From 0fc65b37a1e7585ca2347bf61dcb8bc3a6b146a4 Mon Sep 17 00:00:00 2001 From: rsc Date: Sun, 21 Mar 2004 14:04:56 +0000 Subject: Add most of libsec. --- src/libsec/port/blowfish.c | 579 +++++++++ src/libsec/port/decodepem.c | 61 + src/libsec/port/des3CBC.c | 59 + src/libsec/port/des3ECB.c | 48 + src/libsec/port/desCBC.c | 59 + src/libsec/port/desECB.c | 48 + src/libsec/port/dsaalloc.c | 72 ++ src/libsec/port/dsagen.c | 58 + src/libsec/port/dsaprimes.c | 97 ++ src/libsec/port/dsaprivtopub.c | 16 + src/libsec/port/dsasign.c | 52 + src/libsec/port/dsaverify.c | 46 + src/libsec/port/egalloc.c | 70 ++ src/libsec/port/egdecrypt.c | 28 + src/libsec/port/egencrypt.c | 38 + src/libsec/port/eggen.c | 21 + src/libsec/port/egprivtopub.c | 17 + src/libsec/port/egsign.c | 43 + src/libsec/port/egtest.c | 34 + src/libsec/port/egverify.c | 29 + src/libsec/port/genprime.c | 27 + src/libsec/port/gensafeprime.c | 36 + src/libsec/port/genstrongprime.c | 57 + src/libsec/port/hmac.c | 56 + src/libsec/port/hmactest.c | 19 + src/libsec/port/md4.c | 271 ++++ src/libsec/port/md4test.c | 31 + src/libsec/port/md5pickle.c | 37 + src/libsec/port/nfastrand.c | 23 + src/libsec/port/primetest.c | 41 + src/libsec/port/prng.c | 15 + src/libsec/port/probably_prime.c | 84 ++ src/libsec/port/rc4.c | 104 ++ src/libsec/port/readcert.c | 51 + src/libsec/port/rsaalloc.c | 52 + src/libsec/port/rsadecrypt.c | 37 + src/libsec/port/rsaencrypt.c | 12 + src/libsec/port/rsafill.c | 61 + src/libsec/port/rsagen.c | 70 ++ src/libsec/port/rsaprivtopub.c | 16 + src/libsec/port/rsatest.c | 57 + src/libsec/port/sha1pickle.c | 38 + src/libsec/port/smallprimes.c | 1004 +++++++++++++++ src/libsec/port/smallprimetest.c | 1039 ++++++++++++++++ src/libsec/port/thumb.c | 97 ++ src/libsec/port/tlshand.c | 2291 ++++++++++++++++++++++++++++++++++ src/libsec/port/x509.c | 2524 ++++++++++++++++++++++++++++++++++++++ 47 files changed, 9625 insertions(+) create mode 100644 src/libsec/port/blowfish.c create mode 100644 src/libsec/port/decodepem.c create mode 100644 src/libsec/port/des3CBC.c create mode 100644 src/libsec/port/des3ECB.c create mode 100644 src/libsec/port/desCBC.c create mode 100644 src/libsec/port/desECB.c create mode 100644 src/libsec/port/dsaalloc.c create mode 100644 src/libsec/port/dsagen.c create mode 100644 src/libsec/port/dsaprimes.c create mode 100644 src/libsec/port/dsaprivtopub.c create mode 100644 src/libsec/port/dsasign.c create mode 100644 src/libsec/port/dsaverify.c create mode 100644 src/libsec/port/egalloc.c create mode 100644 src/libsec/port/egdecrypt.c create mode 100644 src/libsec/port/egencrypt.c create mode 100644 src/libsec/port/eggen.c create mode 100644 src/libsec/port/egprivtopub.c create mode 100644 src/libsec/port/egsign.c create mode 100644 src/libsec/port/egtest.c create mode 100644 src/libsec/port/egverify.c create mode 100644 src/libsec/port/genprime.c create mode 100644 src/libsec/port/gensafeprime.c create mode 100644 src/libsec/port/genstrongprime.c create mode 100644 src/libsec/port/hmac.c create mode 100644 src/libsec/port/hmactest.c create mode 100644 src/libsec/port/md4.c create mode 100644 src/libsec/port/md4test.c create mode 100644 src/libsec/port/md5pickle.c create mode 100644 src/libsec/port/nfastrand.c create mode 100644 src/libsec/port/primetest.c create mode 100644 src/libsec/port/prng.c create mode 100644 src/libsec/port/probably_prime.c create mode 100644 src/libsec/port/rc4.c create mode 100644 src/libsec/port/readcert.c create mode 100644 src/libsec/port/rsaalloc.c create mode 100644 src/libsec/port/rsadecrypt.c create mode 100644 src/libsec/port/rsaencrypt.c create mode 100644 src/libsec/port/rsafill.c create mode 100644 src/libsec/port/rsagen.c create mode 100644 src/libsec/port/rsaprivtopub.c create mode 100644 src/libsec/port/rsatest.c create mode 100644 src/libsec/port/sha1pickle.c create mode 100644 src/libsec/port/smallprimes.c create mode 100644 src/libsec/port/smallprimetest.c create mode 100644 src/libsec/port/thumb.c create mode 100644 src/libsec/port/tlshand.c create mode 100644 src/libsec/port/x509.c (limited to 'src/libsec/port') diff --git a/src/libsec/port/blowfish.c b/src/libsec/port/blowfish.c new file mode 100644 index 00000000..5dcc677c --- /dev/null +++ b/src/libsec/port/blowfish.c @@ -0,0 +1,579 @@ +#include "os.h" +#include +#include + +// Blowfish block cipher. See: +// Lecture Notes in Computer Science 809 +// Fast Software Encryption +// Cambridge Security Workshop, Cambridge, England (1993) + +static u32int sbox[1024]; +static u32int pbox[BFrounds+2]; + +static void bfencrypt(u32int *, BFstate *); +static void bfdecrypt(u32int *, BFstate *); + +void +setupBFstate(BFstate *s, uchar key[], int keybytes, uchar *ivec) +{ + int i, j; + u32int n, buf[2]; + + memset(s, 0, sizeof(*s)); + memset(buf, 0, sizeof buf); + + if (keybytes > sizeof(s->key)) + keybytes = sizeof(s->key); + + memmove(s->key, key, keybytes); + + if (ivec != nil) + memmove(s->ivec, ivec, sizeof(s->ivec)); + else + memset(s->ivec, 0, sizeof(s->ivec)); + + memmove(s->pbox, pbox, sizeof(pbox)); + memmove(s->sbox, sbox, sizeof(sbox)); + + if (keybytes > 4*(BFrounds + 2)) + keybytes = 4*(BFrounds + 2); + + for(i=j=0; i < BFrounds+2; i++) { + n = key[j]; + j = (j+1) % keybytes; + + n <<= 8; + n |= key[j]; + j = (j+1) % keybytes; + + n <<= 8; + n |= key[j]; + j = (j+1) % keybytes; + + n <<= 8; + n |= key[j]; + j = (j+1) % keybytes; + + s->pbox[i] ^= n; + } + + for(i=0; i < BFrounds+2; i += 2) { + bfencrypt(buf, s); + s->pbox[i] = buf[0]; + s->pbox[i+1] = buf[1]; + } + + for(i=0; i < 1024; i += 2) { + bfencrypt(buf, s); + s->sbox[i] = buf[0]; + s->sbox[i+1] = buf[1]; + } + + s->setup = 0xcafebabe; +} + +void +bfCBCencrypt(uchar *buf, int n, BFstate *s) +{ + int i; + uchar *p; + u32int bo[2], bi[2], b; + + assert((n & 7) == 0); + + bo[0] = s->ivec[0] | ((u32int) s->ivec[1]<<8) | ((u32int)s->ivec[2]<<16) | ((u32int)s->ivec[3]<<24); + bo[1] = s->ivec[4] | ((u32int) s->ivec[5]<<8) | ((u32int)s->ivec[6]<<16) | ((u32int)s->ivec[7]<<24); + + for(i=0; i < n; i += 8, buf += 8) { + bi[0] = buf[0] | ((u32int) buf[1]<<8) | ((u32int)buf[2]<<16) | ((u32int)buf[3]<<24); + bi[1] = buf[4] | ((u32int) buf[5]<<8) | ((u32int)buf[6]<<16) | ((u32int)buf[7]<<24); + + bi[0] ^= bo[0]; + bi[1] ^= bo[1]; + + bfencrypt(bi, s); + + bo[0] = bi[0]; + bo[1] = bi[1]; + + p = buf; + b = bo[0]; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + + b = bo[1]; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p = b; + } + + s->ivec[7] = bo[1] >> 24; + s->ivec[6] = bo[1] >> 16; + s->ivec[5] = bo[1] >> 8; + s->ivec[4] = bo[1]; + + s->ivec[3] = bo[0] >> 24; + s->ivec[2] = bo[0] >> 16; + s->ivec[1] = bo[0] >> 8; + s->ivec[0] = bo[0]; + + return; +} + +void +bfCBCdecrypt(uchar *buf, int n, BFstate *s) +{ + int i; + uchar *p; + u32int b, bo[2], bi[2], xr[2]; + + assert((n & 7) == 0); + + bo[0] = s->ivec[0] | ((u32int) s->ivec[1]<<8) | ((u32int)s->ivec[2]<<16) | ((u32int)s->ivec[3]<<24); + bo[1] = s->ivec[4] | ((u32int) s->ivec[5]<<8) | ((u32int)s->ivec[6]<<16) | ((u32int)s->ivec[7]<<24); + + for(i=0; i < n; i += 8, buf += 8) { + bi[0] = buf[0] | ((u32int) buf[1]<<8) | ((u32int)buf[2]<<16) | ((u32int)buf[3]<<24); + bi[1] = buf[4] | ((u32int) buf[5]<<8) | ((u32int)buf[6]<<16) | ((u32int)buf[7]<<24); + + xr[0] = bi[0]; + xr[1] = bi[1]; + + bfdecrypt(bi, s); + + bo[0] ^= bi[0]; + bo[1] ^= bi[1]; + + p = buf; + b = bo[0]; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + + b = bo[1]; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p++ = b; + b >>= 8; + *p = b; + + bo[0] = xr[0]; + bo[1] = xr[1]; + } + + s->ivec[7] = bo[1] >> 24; + s->ivec[6] = bo[1] >> 16; + s->ivec[5] = bo[1] >> 8; + s->ivec[4] = bo[1]; + + s->ivec[3] = bo[0] >> 24; + s->ivec[2] = bo[0] >> 16; + s->ivec[1] = bo[0] >> 8; + s->ivec[0] = bo[0]; + + return; +} + +void +bfECBencrypt(uchar *buf, int n, BFstate *s) +{ + int i; + u32int b[2]; + + for(i=0; i < n; i += 8, buf += 8) { + b[0] = buf[0] | ((u32int) buf[1]<<8) | ((u32int)buf[2]<<16) | ((u32int)buf[3]<<24); + b[1] = buf[4] | ((u32int) buf[5]<<8) | ((u32int)buf[6]<<16) | ((u32int)buf[7]<<24); + + bfencrypt(b, s); + + buf[7] = b[1] >> 24; + buf[6] = b[1] >> 16; + buf[5] = b[1] >> 8; + buf[4] = b[1]; + + buf[3] = b[0] >> 24; + buf[2] = b[0] >> 16; + buf[1] = b[0] >> 8; + buf[0] = b[0]; + } + + return; +} + +void +bfECBdecrypt(uchar *buf, int n, BFstate *s) +{ + int i; + u32int b[2]; + + for(i=0; i < n; i += 8, buf += 8) { + b[0] = buf[0] | ((u32int) buf[1]<<8) | ((u32int)buf[2]<<16) | ((u32int)buf[3]<<24); + b[1] = buf[4] | ((u32int) buf[5]<<8) | ((u32int)buf[6]<<16) | ((u32int)buf[7]<<24); + + bfdecrypt(b, s); + + buf[7] = b[1] >> 24; + buf[6] = b[1] >> 16; + buf[5] = b[1] >> 8; + buf[4] = b[1]; + + buf[3] = b[0] >> 24; + buf[2] = b[0] >> 16; + buf[1] = b[0] >> 8; + buf[0] = b[0]; + } + + return; +} + +static void +bfencrypt(u32int *b, BFstate *s) +{ + int i; + u32int l, r; + u32int *pb, *sb; + + l = b[0]; + r = b[1]; + + pb = s->pbox; + sb = s->sbox; + + l ^= pb[0]; + + for(i=1; i<16; i += 2) { + r ^= pb[i]; + r ^= ( (sb[ (uchar) (l>>24)] + sb[256 + ((uchar) (l>>16))]) ^ + sb[512 + ((uchar) (l>>8))]) + sb[768 +((uchar) l)]; + + l ^= pb[i+1]; + l ^= ( (sb[ (uchar) (r>>24)] + sb[256 + ((uchar) (r>>16))]) ^ + sb[512 + ((uchar) (r>>8))]) + sb[768 +((uchar) r)]; + } + + r ^= pb[BFrounds+1]; + + /* sic */ + b[0] = r; + b[1] = l; + + return; +} + +static void +bfdecrypt(u32int *b, BFstate *s) +{ + int i; + u32int l, r; + u32int *pb, *sb; + + l = b[0]; + r = b[1]; + + pb = s->pbox; + sb = s->sbox; + + l ^= pb[BFrounds+1]; + + for(i=16; i > 0; i -= 2) { + r ^= pb[i]; + r ^= ( (sb[ (uchar) (l>>24)] + sb[256 + ((uchar) (l>>16))]) ^ + sb[512 + ((uchar) (l>>8))]) + sb[768 +((uchar) l)]; + + l ^= pb[i-1]; + l ^= ( (sb[ (uchar) (r>>24)] + sb[256 + ((uchar) (r>>16))]) ^ + sb[512 + ((uchar) (r>>8))]) + sb[768 +((uchar) r)]; + } + + r ^= pb[0]; + + /* sic */ + b[0] = r; + b[1] = l; + + return; +} + +static u32int pbox[BFrounds+2] = { + 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, + 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, + 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, + 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, + 0x9216d5d9, 0x8979fb1b +}; + +static u32int sbox[1024] = { + 0xd1310ba6L, 0x98dfb5acL, 0x2ffd72dbL, 0xd01adfb7L, + 0xb8e1afedL, 0x6a267e96L, 0xba7c9045L, 0xf12c7f99L, + 0x24a19947L, 0xb3916cf7L, 0x0801f2e2L, 0x858efc16L, + 0x636920d8L, 0x71574e69L, 0xa458fea3L, 0xf4933d7eL, + 0x0d95748fL, 0x728eb658L, 0x718bcd58L, 0x82154aeeL, + 0x7b54a41dL, 0xc25a59b5L, 0x9c30d539L, 0x2af26013L, + 0xc5d1b023L, 0x286085f0L, 0xca417918L, 0xb8db38efL, + 0x8e79dcb0L, 0x603a180eL, 0x6c9e0e8bL, 0xb01e8a3eL, + 0xd71577c1L, 0xbd314b27L, 0x78af2fdaL, 0x55605c60L, + 0xe65525f3L, 0xaa55ab94L, 0x57489862L, 0x63e81440L, + 0x55ca396aL, 0x2aab10b6L, 0xb4cc5c34L, 0x1141e8ceL, + 0xa15486afL, 0x7c72e993L, 0xb3ee1411L, 0x636fbc2aL, + 0x2ba9c55dL, 0x741831f6L, 0xce5c3e16L, 0x9b87931eL, + 0xafd6ba33L, 0x6c24cf5cL, 0x7a325381L, 0x28958677L, + 0x3b8f4898L, 0x6b4bb9afL, 0xc4bfe81bL, 0x66282193L, + 0x61d809ccL, 0xfb21a991L, 0x487cac60L, 0x5dec8032L, + 0xef845d5dL, 0xe98575b1L, 0xdc262302L, 0xeb651b88L, + 0x23893e81L, 0xd396acc5L, 0x0f6d6ff3L, 0x83f44239L, + 0x2e0b4482L, 0xa4842004L, 0x69c8f04aL, 0x9e1f9b5eL, + 0x21c66842L, 0xf6e96c9aL, 0x670c9c61L, 0xabd388f0L, + 0x6a51a0d2L, 0xd8542f68L, 0x960fa728L, 0xab5133a3L, + 0x6eef0b6cL, 0x137a3be4L, 0xba3bf050L, 0x7efb2a98L, + 0xa1f1651dL, 0x39af0176L, 0x66ca593eL, 0x82430e88L, + 0x8cee8619L, 0x456f9fb4L, 0x7d84a5c3L, 0x3b8b5ebeL, + 0xe06f75d8L, 0x85c12073L, 0x401a449fL, 0x56c16aa6L, + 0x4ed3aa62L, 0x363f7706L, 0x1bfedf72L, 0x429b023dL, + 0x37d0d724L, 0xd00a1248L, 0xdb0fead3L, 0x49f1c09bL, + 0x075372c9L, 0x80991b7bL, 0x25d479d8L, 0xf6e8def7L, + 0xe3fe501aL, 0xb6794c3bL, 0x976ce0bdL, 0x04c006baL, + 0xc1a94fb6L, 0x409f60c4L, 0x5e5c9ec2L, 0x196a2463L, + 0x68fb6fafL, 0x3e6c53b5L, 0x1339b2ebL, 0x3b52ec6fL, + 0x6dfc511fL, 0x9b30952cL, 0xcc814544L, 0xaf5ebd09L, + 0xbee3d004L, 0xde334afdL, 0x660f2807L, 0x192e4bb3L, + 0xc0cba857L, 0x45c8740fL, 0xd20b5f39L, 0xb9d3fbdbL, + 0x5579c0bdL, 0x1a60320aL, 0xd6a100c6L, 0x402c7279L, + 0x679f25feL, 0xfb1fa3ccL, 0x8ea5e9f8L, 0xdb3222f8L, + 0x3c7516dfL, 0xfd616b15L, 0x2f501ec8L, 0xad0552abL, + 0x323db5faL, 0xfd238760L, 0x53317b48L, 0x3e00df82L, + 0x9e5c57bbL, 0xca6f8ca0L, 0x1a87562eL, 0xdf1769dbL, + 0xd542a8f6L, 0x287effc3L, 0xac6732c6L, 0x8c4f5573L, + 0x695b27b0L, 0xbbca58c8L, 0xe1ffa35dL, 0xb8f011a0L, + 0x10fa3d98L, 0xfd2183b8L, 0x4afcb56cL, 0x2dd1d35bL, + 0x9a53e479L, 0xb6f84565L, 0xd28e49bcL, 0x4bfb9790L, + 0xe1ddf2daL, 0xa4cb7e33L, 0x62fb1341L, 0xcee4c6e8L, + 0xef20cadaL, 0x36774c01L, 0xd07e9efeL, 0x2bf11fb4L, + 0x95dbda4dL, 0xae909198L, 0xeaad8e71L, 0x6b93d5a0L, + 0xd08ed1d0L, 0xafc725e0L, 0x8e3c5b2fL, 0x8e7594b7L, + 0x8ff6e2fbL, 0xf2122b64L, 0x8888b812L, 0x900df01cL, + 0x4fad5ea0L, 0x688fc31cL, 0xd1cff191L, 0xb3a8c1adL, + 0x2f2f2218L, 0xbe0e1777L, 0xea752dfeL, 0x8b021fa1L, + 0xe5a0cc0fL, 0xb56f74e8L, 0x18acf3d6L, 0xce89e299L, + 0xb4a84fe0L, 0xfd13e0b7L, 0x7cc43b81L, 0xd2ada8d9L, + 0x165fa266L, 0x80957705L, 0x93cc7314L, 0x211a1477L, + 0xe6ad2065L, 0x77b5fa86L, 0xc75442f5L, 0xfb9d35cfL, + 0xebcdaf0cL, 0x7b3e89a0L, 0xd6411bd3L, 0xae1e7e49L, + 0x00250e2dL, 0x2071b35eL, 0x226800bbL, 0x57b8e0afL, + 0x2464369bL, 0xf009b91eL, 0x5563911dL, 0x59dfa6aaL, + 0x78c14389L, 0xd95a537fL, 0x207d5ba2L, 0x02e5b9c5L, + 0x83260376L, 0x6295cfa9L, 0x11c81968L, 0x4e734a41L, + 0xb3472dcaL, 0x7b14a94aL, 0x1b510052L, 0x9a532915L, + 0xd60f573fL, 0xbc9bc6e4L, 0x2b60a476L, 0x81e67400L, + 0x08ba6fb5L, 0x571be91fL, 0xf296ec6bL, 0x2a0dd915L, + 0xb6636521L, 0xe7b9f9b6L, 0xff34052eL, 0xc5855664L, + 0x53b02d5dL, 0xa99f8fa1L, 0x08ba4799L, 0x6e85076aL, + 0x4b7a70e9L, 0xb5b32944L, 0xdb75092eL, 0xc4192623L, + 0xad6ea6b0L, 0x49a7df7dL, 0x9cee60b8L, 0x8fedb266L, + 0xecaa8c71L, 0x699a17ffL, 0x5664526cL, 0xc2b19ee1L, + 0x193602a5L, 0x75094c29L, 0xa0591340L, 0xe4183a3eL, + 0x3f54989aL, 0x5b429d65L, 0x6b8fe4d6L, 0x99f73fd6L, + 0xa1d29c07L, 0xefe830f5L, 0x4d2d38e6L, 0xf0255dc1L, + 0x4cdd2086L, 0x8470eb26L, 0x6382e9c6L, 0x021ecc5eL, + 0x09686b3fL, 0x3ebaefc9L, 0x3c971814L, 0x6b6a70a1L, + 0x687f3584L, 0x52a0e286L, 0xb79c5305L, 0xaa500737L, + 0x3e07841cL, 0x7fdeae5cL, 0x8e7d44ecL, 0x5716f2b8L, + 0xb03ada37L, 0xf0500c0dL, 0xf01c1f04L, 0x0200b3ffL, + 0xae0cf51aL, 0x3cb574b2L, 0x25837a58L, 0xdc0921bdL, + 0xd19113f9L, 0x7ca92ff6L, 0x94324773L, 0x22f54701L, + 0x3ae5e581L, 0x37c2dadcL, 0xc8b57634L, 0x9af3dda7L, + 0xa9446146L, 0x0fd0030eL, 0xecc8c73eL, 0xa4751e41L, + 0xe238cd99L, 0x3bea0e2fL, 0x3280bba1L, 0x183eb331L, + 0x4e548b38L, 0x4f6db908L, 0x6f420d03L, 0xf60a04bfL, + 0x2cb81290L, 0x24977c79L, 0x5679b072L, 0xbcaf89afL, + 0xde9a771fL, 0xd9930810L, 0xb38bae12L, 0xdccf3f2eL, + 0x5512721fL, 0x2e6b7124L, 0x501adde6L, 0x9f84cd87L, + 0x7a584718L, 0x7408da17L, 0xbc9f9abcL, 0xe94b7d8cL, + 0xec7aec3aL, 0xdb851dfaL, 0x63094366L, 0xc464c3d2L, + 0xef1c1847L, 0x3215d908L, 0xdd433b37L, 0x24c2ba16L, + 0x12a14d43L, 0x2a65c451L, 0x50940002L, 0x133ae4ddL, + 0x71dff89eL, 0x10314e55L, 0x81ac77d6L, 0x5f11199bL, + 0x043556f1L, 0xd7a3c76bL, 0x3c11183bL, 0x5924a509L, + 0xf28fe6edL, 0x97f1fbfaL, 0x9ebabf2cL, 0x1e153c6eL, + 0x86e34570L, 0xeae96fb1L, 0x860e5e0aL, 0x5a3e2ab3L, + 0x771fe71cL, 0x4e3d06faL, 0x2965dcb9L, 0x99e71d0fL, + 0x803e89d6L, 0x5266c825L, 0x2e4cc978L, 0x9c10b36aL, + 0xc6150ebaL, 0x94e2ea78L, 0xa5fc3c53L, 0x1e0a2df4L, + 0xf2f74ea7L, 0x361d2b3dL, 0x1939260fL, 0x19c27960L, + 0x5223a708L, 0xf71312b6L, 0xebadfe6eL, 0xeac31f66L, + 0xe3bc4595L, 0xa67bc883L, 0xb17f37d1L, 0x018cff28L, + 0xc332ddefL, 0xbe6c5aa5L, 0x65582185L, 0x68ab9802L, + 0xeecea50fL, 0xdb2f953bL, 0x2aef7dadL, 0x5b6e2f84L, + 0x1521b628L, 0x29076170L, 0xecdd4775L, 0x619f1510L, + 0x13cca830L, 0xeb61bd96L, 0x0334fe1eL, 0xaa0363cfL, + 0xb5735c90L, 0x4c70a239L, 0xd59e9e0bL, 0xcbaade14L, + 0xeecc86bcL, 0x60622ca7L, 0x9cab5cabL, 0xb2f3846eL, + 0x648b1eafL, 0x19bdf0caL, 0xa02369b9L, 0x655abb50L, + 0x40685a32L, 0x3c2ab4b3L, 0x319ee9d5L, 0xc021b8f7L, + 0x9b540b19L, 0x875fa099L, 0x95f7997eL, 0x623d7da8L, + 0xf837889aL, 0x97e32d77L, 0x11ed935fL, 0x16681281L, + 0x0e358829L, 0xc7e61fd6L, 0x96dedfa1L, 0x7858ba99L, + 0x57f584a5L, 0x1b227263L, 0x9b83c3ffL, 0x1ac24696L, + 0xcdb30aebL, 0x532e3054L, 0x8fd948e4L, 0x6dbc3128L, + 0x58ebf2efL, 0x34c6ffeaL, 0xfe28ed61L, 0xee7c3c73L, + 0x5d4a14d9L, 0xe864b7e3L, 0x42105d14L, 0x203e13e0L, + 0x45eee2b6L, 0xa3aaabeaL, 0xdb6c4f15L, 0xfacb4fd0L, + 0xc742f442L, 0xef6abbb5L, 0x654f3b1dL, 0x41cd2105L, + 0xd81e799eL, 0x86854dc7L, 0xe44b476aL, 0x3d816250L, + 0xcf62a1f2L, 0x5b8d2646L, 0xfc8883a0L, 0xc1c7b6a3L, + 0x7f1524c3L, 0x69cb7492L, 0x47848a0bL, 0x5692b285L, + 0x095bbf00L, 0xad19489dL, 0x1462b174L, 0x23820e00L, + 0x58428d2aL, 0x0c55f5eaL, 0x1dadf43eL, 0x233f7061L, + 0x3372f092L, 0x8d937e41L, 0xd65fecf1L, 0x6c223bdbL, + 0x7cde3759L, 0xcbee7460L, 0x4085f2a7L, 0xce77326eL, + 0xa6078084L, 0x19f8509eL, 0xe8efd855L, 0x61d99735L, + 0xa969a7aaL, 0xc50c06c2L, 0x5a04abfcL, 0x800bcadcL, + 0x9e447a2eL, 0xc3453484L, 0xfdd56705L, 0x0e1e9ec9L, + 0xdb73dbd3L, 0x105588cdL, 0x675fda79L, 0xe3674340L, + 0xc5c43465L, 0x713e38d8L, 0x3d28f89eL, 0xf16dff20L, + 0x153e21e7L, 0x8fb03d4aL, 0xe6e39f2bL, 0xdb83adf7L, + 0xe93d5a68L, 0x948140f7L, 0xf64c261cL, 0x94692934L, + 0x411520f7L, 0x7602d4f7L, 0xbcf46b2eL, 0xd4a20068L, + 0xd4082471L, 0x3320f46aL, 0x43b7d4b7L, 0x500061afL, + 0x1e39f62eL, 0x97244546L, 0x14214f74L, 0xbf8b8840L, + 0x4d95fc1dL, 0x96b591afL, 0x70f4ddd3L, 0x66a02f45L, + 0xbfbc09ecL, 0x03bd9785L, 0x7fac6dd0L, 0x31cb8504L, + 0x96eb27b3L, 0x55fd3941L, 0xda2547e6L, 0xabca0a9aL, + 0x28507825L, 0x530429f4L, 0x0a2c86daL, 0xe9b66dfbL, + 0x68dc1462L, 0xd7486900L, 0x680ec0a4L, 0x27a18deeL, + 0x4f3ffea2L, 0xe887ad8cL, 0xb58ce006L, 0x7af4d6b6L, + 0xaace1e7cL, 0xd3375fecL, 0xce78a399L, 0x406b2a42L, + 0x20fe9e35L, 0xd9f385b9L, 0xee39d7abL, 0x3b124e8bL, + 0x1dc9faf7L, 0x4b6d1856L, 0x26a36631L, 0xeae397b2L, + 0x3a6efa74L, 0xdd5b4332L, 0x6841e7f7L, 0xca7820fbL, + 0xfb0af54eL, 0xd8feb397L, 0x454056acL, 0xba489527L, + 0x55533a3aL, 0x20838d87L, 0xfe6ba9b7L, 0xd096954bL, + 0x55a867bcL, 0xa1159a58L, 0xcca92963L, 0x99e1db33L, + 0xa62a4a56L, 0x3f3125f9L, 0x5ef47e1cL, 0x9029317cL, + 0xfdf8e802L, 0x04272f70L, 0x80bb155cL, 0x05282ce3L, + 0x95c11548L, 0xe4c66d22L, 0x48c1133fL, 0xc70f86dcL, + 0x07f9c9eeL, 0x41041f0fL, 0x404779a4L, 0x5d886e17L, + 0x325f51ebL, 0xd59bc0d1L, 0xf2bcc18fL, 0x41113564L, + 0x257b7834L, 0x602a9c60L, 0xdff8e8a3L, 0x1f636c1bL, + 0x0e12b4c2L, 0x02e1329eL, 0xaf664fd1L, 0xcad18115L, + 0x6b2395e0L, 0x333e92e1L, 0x3b240b62L, 0xeebeb922L, + 0x85b2a20eL, 0xe6ba0d99L, 0xde720c8cL, 0x2da2f728L, + 0xd0127845L, 0x95b794fdL, 0x647d0862L, 0xe7ccf5f0L, + 0x5449a36fL, 0x877d48faL, 0xc39dfd27L, 0xf33e8d1eL, + 0x0a476341L, 0x992eff74L, 0x3a6f6eabL, 0xf4f8fd37L, + 0xa812dc60L, 0xa1ebddf8L, 0x991be14cL, 0xdb6e6b0dL, + 0xc67b5510L, 0x6d672c37L, 0x2765d43bL, 0xdcd0e804L, + 0xf1290dc7L, 0xcc00ffa3L, 0xb5390f92L, 0x690fed0bL, + 0x667b9ffbL, 0xcedb7d9cL, 0xa091cf0bL, 0xd9155ea3L, + 0xbb132f88L, 0x515bad24L, 0x7b9479bfL, 0x763bd6ebL, + 0x37392eb3L, 0xcc115979L, 0x8026e297L, 0xf42e312dL, + 0x6842ada7L, 0xc66a2b3bL, 0x12754cccL, 0x782ef11cL, + 0x6a124237L, 0xb79251e7L, 0x06a1bbe6L, 0x4bfb6350L, + 0x1a6b1018L, 0x11caedfaL, 0x3d25bdd8L, 0xe2e1c3c9L, + 0x44421659L, 0x0a121386L, 0xd90cec6eL, 0xd5abea2aL, + 0x64af674eL, 0xda86a85fL, 0xbebfe988L, 0x64e4c3feL, + 0x9dbc8057L, 0xf0f7c086L, 0x60787bf8L, 0x6003604dL, + 0xd1fd8346L, 0xf6381fb0L, 0x7745ae04L, 0xd736fcccL, + 0x83426b33L, 0xf01eab71L, 0xb0804187L, 0x3c005e5fL, + 0x77a057beL, 0xbde8ae24L, 0x55464299L, 0xbf582e61L, + 0x4e58f48fL, 0xf2ddfda2L, 0xf474ef38L, 0x8789bdc2L, + 0x5366f9c3L, 0xc8b38e74L, 0xb475f255L, 0x46fcd9b9L, + 0x7aeb2661L, 0x8b1ddf84L, 0x846a0e79L, 0x915f95e2L, + 0x466e598eL, 0x20b45770L, 0x8cd55591L, 0xc902de4cL, + 0xb90bace1L, 0xbb8205d0L, 0x11a86248L, 0x7574a99eL, + 0xb77f19b6L, 0xe0a9dc09L, 0x662d09a1L, 0xc4324633L, + 0xe85a1f02L, 0x09f0be8cL, 0x4a99a025L, 0x1d6efe10L, + 0x1ab93d1dL, 0x0ba5a4dfL, 0xa186f20fL, 0x2868f169L, + 0xdcb7da83L, 0x573906feL, 0xa1e2ce9bL, 0x4fcd7f52L, + 0x50115e01L, 0xa70683faL, 0xa002b5c4L, 0x0de6d027L, + 0x9af88c27L, 0x773f8641L, 0xc3604c06L, 0x61a806b5L, + 0xf0177a28L, 0xc0f586e0L, 0x006058aaL, 0x30dc7d62L, + 0x11e69ed7L, 0x2338ea63L, 0x53c2dd94L, 0xc2c21634L, + 0xbbcbee56L, 0x90bcb6deL, 0xebfc7da1L, 0xce591d76L, + 0x6f05e409L, 0x4b7c0188L, 0x39720a3dL, 0x7c927c24L, + 0x86e3725fL, 0x724d9db9L, 0x1ac15bb4L, 0xd39eb8fcL, + 0xed545578L, 0x08fca5b5L, 0xd83d7cd3L, 0x4dad0fc4L, + 0x1e50ef5eL, 0xb161e6f8L, 0xa28514d9L, 0x6c51133cL, + 0x6fd5c7e7L, 0x56e14ec4L, 0x362abfceL, 0xddc6c837L, + 0xd79a3234L, 0x92638212L, 0x670efa8eL, 0x406000e0L, + 0x3a39ce37L, 0xd3faf5cfL, 0xabc27737L, 0x5ac52d1bL, + 0x5cb0679eL, 0x4fa33742L, 0xd3822740L, 0x99bc9bbeL, + 0xd5118e9dL, 0xbf0f7315L, 0xd62d1c7eL, 0xc700c47bL, + 0xb78c1b6bL, 0x21a19045L, 0xb26eb1beL, 0x6a366eb4L, + 0x5748ab2fL, 0xbc946e79L, 0xc6a376d2L, 0x6549c2c8L, + 0x530ff8eeL, 0x468dde7dL, 0xd5730a1dL, 0x4cd04dc6L, + 0x2939bbdbL, 0xa9ba4650L, 0xac9526e8L, 0xbe5ee304L, + 0xa1fad5f0L, 0x6a2d519aL, 0x63ef8ce2L, 0x9a86ee22L, + 0xc089c2b8L, 0x43242ef6L, 0xa51e03aaL, 0x9cf2d0a4L, + 0x83c061baL, 0x9be96a4dL, 0x8fe51550L, 0xba645bd6L, + 0x2826a2f9L, 0xa73a3ae1L, 0x4ba99586L, 0xef5562e9L, + 0xc72fefd3L, 0xf752f7daL, 0x3f046f69L, 0x77fa0a59L, + 0x80e4a915L, 0x87b08601L, 0x9b09e6adL, 0x3b3ee593L, + 0xe990fd5aL, 0x9e34d797L, 0x2cf0b7d9L, 0x022b8b51L, + 0x96d5ac3aL, 0x017da67dL, 0xd1cf3ed6L, 0x7c7d2d28L, + 0x1f9f25cfL, 0xadf2b89bL, 0x5ad6b472L, 0x5a88f54cL, + 0xe029ac71L, 0xe019a5e6L, 0x47b0acfdL, 0xed93fa9bL, + 0xe8d3c48dL, 0x283b57ccL, 0xf8d56629L, 0x79132e28L, + 0x785f0191L, 0xed756055L, 0xf7960e44L, 0xe3d35e8cL, + 0x15056dd4L, 0x88f46dbaL, 0x03a16125L, 0x0564f0bdL, + 0xc3eb9e15L, 0x3c9057a2L, 0x97271aecL, 0xa93a072aL, + 0x1b3f6d9bL, 0x1e6321f5L, 0xf59c66fbL, 0x26dcf319L, + 0x7533d928L, 0xb155fdf5L, 0x03563482L, 0x8aba3cbbL, + 0x28517711L, 0xc20ad9f8L, 0xabcc5167L, 0xccad925fL, + 0x4de81751L, 0x3830dc8eL, 0x379d5862L, 0x9320f991L, + 0xea7a90c2L, 0xfb3e7bceL, 0x5121ce64L, 0x774fbe32L, + 0xa8b6e37eL, 0xc3293d46L, 0x48de5369L, 0x6413e680L, + 0xa2ae0810L, 0xdd6db224L, 0x69852dfdL, 0x09072166L, + 0xb39a460aL, 0x6445c0ddL, 0x586cdecfL, 0x1c20c8aeL, + 0x5bbef7ddL, 0x1b588d40L, 0xccd2017fL, 0x6bb4e3bbL, + 0xdda26a7eL, 0x3a59ff45L, 0x3e350a44L, 0xbcb4cdd5L, + 0x72eacea8L, 0xfa6484bbL, 0x8d6612aeL, 0xbf3c6f47L, + 0xd29be463L, 0x542f5d9eL, 0xaec2771bL, 0xf64e6370L, + 0x740e0d8dL, 0xe75b1357L, 0xf8721671L, 0xaf537d5dL, + 0x4040cb08L, 0x4eb4e2ccL, 0x34d2466aL, 0x0115af84L, + 0xe1b00428L, 0x95983a1dL, 0x06b89fb4L, 0xce6ea048L, + 0x6f3f3b82L, 0x3520ab82L, 0x011a1d4bL, 0x277227f8L, + 0x611560b1L, 0xe7933fdcL, 0xbb3a792bL, 0x344525bdL, + 0xa08839e1L, 0x51ce794bL, 0x2f32c9b7L, 0xa01fbac9L, + 0xe01cc87eL, 0xbcc7d1f6L, 0xcf0111c3L, 0xa1e8aac7L, + 0x1a908749L, 0xd44fbd9aL, 0xd0dadecbL, 0xd50ada38L, + 0x0339c32aL, 0xc6913667L, 0x8df9317cL, 0xe0b12b4fL, + 0xf79e59b7L, 0x43f5bb3aL, 0xf2d519ffL, 0x27d9459cL, + 0xbf97222cL, 0x15e6fc2aL, 0x0f91fc71L, 0x9b941525L, + 0xfae59361L, 0xceb69cebL, 0xc2a86459L, 0x12baa8d1L, + 0xb6c1075eL, 0xe3056a0cL, 0x10d25065L, 0xcb03a442L, + 0xe0ec6e0eL, 0x1698db3bL, 0x4c98a0beL, 0x3278e964L, + 0x9f1f9532L, 0xe0d392dfL, 0xd3a0342bL, 0x8971f21eL, + 0x1b0a7441L, 0x4ba3348cL, 0xc5be7120L, 0xc37632d8L, + 0xdf359f8dL, 0x9b992f2eL, 0xe60b6f47L, 0x0fe3f11dL, + 0xe54cda54L, 0x1edad891L, 0xce6279cfL, 0xcd3e7e6fL, + 0x1618b166L, 0xfd2c1d05L, 0x848fd2c5L, 0xf6fb2299L, + 0xf523f357L, 0xa6327623L, 0x93a83531L, 0x56cccd02L, + 0xacf08162L, 0x5a75ebb5L, 0x6e163697L, 0x88d273ccL, + 0xde966292L, 0x81b949d0L, 0x4c50901bL, 0x71c65614L, + 0xe6c6c7bdL, 0x327a140aL, 0x45e1d006L, 0xc3f27b9aL, + 0xc9aa53fdL, 0x62a80f00L, 0xbb25bfe2L, 0x35bdd2f6L, + 0x71126905L, 0xb2040222L, 0xb6cbcf7cL, 0xcd769c2bL, + 0x53113ec0L, 0x1640e3d3L, 0x38abbd60L, 0x2547adf0L, + 0xba38209cL, 0xf746ce76L, 0x77afa1c5L, 0x20756060L, + 0x85cbfe4eL, 0x8ae88dd8L, 0x7aaaf9b0L, 0x4cf9aa7eL, + 0x1948c25cL, 0x02fb8a8cL, 0x01c36ae4L, 0xd6ebe1f9L, + 0x90d4f869L, 0xa65cdea0L, 0x3f09252dL, 0xc208e69fL, + 0xb74e6132L, 0xce77e25bL, 0x578fdfe3L, 0x3ac372e6L, +}; + + diff --git a/src/libsec/port/decodepem.c b/src/libsec/port/decodepem.c new file mode 100644 index 00000000..194a4558 --- /dev/null +++ b/src/libsec/port/decodepem.c @@ -0,0 +1,61 @@ +#include +#include +#include +#include + +#define STRLEN(s) (sizeof(s)-1) + +uchar* +decodepem(char *s, char *type, int *len) +{ + uchar *d; + char *t, *e, *tt; + int n; + + *len = 0; + + /* + * find the correct section of the file, stripping garbage at the beginning and end. + * the data is delimited by -----BEGIN -----\n and -----END -----\n + */ + n = strlen(type); + e = strchr(s, '\0'); + for(t = s; t != nil && t < e; ){ + tt = t; + t = strchr(tt, '\n'); + if(t != nil) + t++; + if(strncmp(tt, "-----BEGIN ", STRLEN("-----BEGIN ")) == 0 + && strncmp(&tt[STRLEN("-----BEGIN ")], type, n) == 0 + && strncmp(&tt[STRLEN("-----BEGIN ")+n], "-----\n", STRLEN("-----\n")) == 0) + break; + } + for(tt = t; tt != nil && tt < e; tt++){ + if(strncmp(tt, "-----END ", STRLEN("-----END ")) == 0 + && strncmp(&tt[STRLEN("-----END ")], type, n) == 0 + && strncmp(&tt[STRLEN("-----END ")+n], "-----\n", STRLEN("-----\n")) == 0) + break; + tt = strchr(tt, '\n'); + if(tt == nil) + break; + } + if(tt == nil || tt == e){ + werrstr("incorrect .pem file format: bad header or trailer"); + return nil; + } + + n = ((tt - t) * 6 + 7) / 8; + d = malloc(n); + if(d == nil){ + werrstr("out of memory"); + return nil; + } + n = dec64(d, n, t, tt - t); + if(n < 0){ + free(d); + werrstr("incorrect .pem file format: bad base64 encoded data"); + return nil; + } + *len = n; + return d; +} diff --git a/src/libsec/port/des3CBC.c b/src/libsec/port/des3CBC.c new file mode 100644 index 00000000..26329300 --- /dev/null +++ b/src/libsec/port/des3CBC.c @@ -0,0 +1,59 @@ +#include "os.h" +#include +#include + +// Because of the way that non multiple of 8 +// buffers are handled, the decryptor must +// be fed buffers of the same size as the +// encryptor + + +// If the length is not a multiple of 8, I encrypt +// the overflow to be compatible with lacy's cryptlib +void +des3CBCencrypt(uchar *p, int len, DES3state *s) +{ + uchar *p2, *ip, *eip; + + for(; len >= 8; len -= 8){ + p2 = p; + ip = s->ivec; + for(eip = ip+8; ip < eip; ) + *p2++ ^= *ip++; + triple_block_cipher(s->expanded, p, DES3EDE); + memmove(s->ivec, p, 8); + p += 8; + } + + if(len > 0){ + ip = s->ivec; + triple_block_cipher(s->expanded, ip, DES3EDE); + for(eip = ip+len; ip < eip; ) + *p++ ^= *ip++; + } +} + +void +des3CBCdecrypt(uchar *p, int len, DES3state *s) +{ + uchar *ip, *eip, *tp; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + memmove(tmp, p, 8); + triple_block_cipher(s->expanded, p, DES3DED); + tp = tmp; + ip = s->ivec; + for(eip = ip+8; ip < eip; ){ + *p++ ^= *ip; + *ip++ = *tp++; + } + } + + if(len > 0){ + ip = s->ivec; + triple_block_cipher(s->expanded, ip, DES3EDE); + for(eip = ip+len; ip < eip; ) + *p++ ^= *ip++; + } +} diff --git a/src/libsec/port/des3ECB.c b/src/libsec/port/des3ECB.c new file mode 100644 index 00000000..324254b1 --- /dev/null +++ b/src/libsec/port/des3ECB.c @@ -0,0 +1,48 @@ +#include "os.h" +#include +#include + +// I wasn't sure what to do when the buffer was not +// a multiple of 8. I did what lacy's cryptolib did +// to be compatible, but it looks dangerous to me +// since its encrypting plain text with the key. -- presotto + +void +des3ECBencrypt(uchar *p, int len, DES3state *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + triple_block_cipher(s->expanded, p, DES3EDE); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + triple_block_cipher(s->expanded, tmp, DES3EDE); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} + +void +des3ECBdecrypt(uchar *p, int len, DES3state *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + triple_block_cipher(s->expanded, p, DES3DED); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + triple_block_cipher(s->expanded, tmp, DES3EDE); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} diff --git a/src/libsec/port/desCBC.c b/src/libsec/port/desCBC.c new file mode 100644 index 00000000..ecee29e8 --- /dev/null +++ b/src/libsec/port/desCBC.c @@ -0,0 +1,59 @@ +#include "os.h" +#include +#include + +// Because of the way that non multiple of 8 +// buffers are handled, the decryptor must +// be fed buffers of the same size as the +// encryptor + + +// If the length is not a multiple of 8, I encrypt +// the overflow to be compatible with lacy's cryptlib +void +desCBCencrypt(uchar *p, int len, DESstate *s) +{ + uchar *p2, *ip, *eip; + + for(; len >= 8; len -= 8){ + p2 = p; + ip = s->ivec; + for(eip = ip+8; ip < eip; ) + *p2++ ^= *ip++; + block_cipher(s->expanded, p, 0); + memmove(s->ivec, p, 8); + p += 8; + } + + if(len > 0){ + ip = s->ivec; + block_cipher(s->expanded, ip, 0); + for(eip = ip+len; ip < eip; ) + *p++ ^= *ip++; + } +} + +void +desCBCdecrypt(uchar *p, int len, DESstate *s) +{ + uchar *ip, *eip, *tp; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + memmove(tmp, p, 8); + block_cipher(s->expanded, p, 1); + tp = tmp; + ip = s->ivec; + for(eip = ip+8; ip < eip; ){ + *p++ ^= *ip; + *ip++ = *tp++; + } + } + + if(len > 0){ + ip = s->ivec; + block_cipher(s->expanded, ip, 0); + for(eip = ip+len; ip < eip; ) + *p++ ^= *ip++; + } +} diff --git a/src/libsec/port/desECB.c b/src/libsec/port/desECB.c new file mode 100644 index 00000000..a9ad0018 --- /dev/null +++ b/src/libsec/port/desECB.c @@ -0,0 +1,48 @@ +#include "os.h" +#include +#include + +// I wasn't sure what to do when the buffer was not +// a multiple of 8. I did what lacy's cryptolib did +// to be compatible, but it looks dangerous to me +// since its encrypting plain text with the key. -- presotto + +void +desECBencrypt(uchar *p, int len, DESstate *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + block_cipher(s->expanded, p, 0); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + block_cipher(s->expanded, tmp, 0); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} + +void +desECBdecrypt(uchar *p, int len, DESstate *s) +{ + int i; + uchar tmp[8]; + + for(; len >= 8; len -= 8){ + block_cipher(s->expanded, p, 1); + p += 8; + } + + if(len > 0){ + for (i=0; i<8; i++) + tmp[i] = i; + block_cipher(s->expanded, tmp, 0); + for (i = 0; i < len; i++) + p[i] ^= tmp[i]; + } +} diff --git a/src/libsec/port/dsaalloc.c b/src/libsec/port/dsaalloc.c new file mode 100644 index 00000000..d82ab3de --- /dev/null +++ b/src/libsec/port/dsaalloc.c @@ -0,0 +1,72 @@ +#include "os.h" +#include +#include + +DSApub* +dsapuballoc(void) +{ + DSApub *dsa; + + dsa = mallocz(sizeof(*dsa), 1); + if(dsa == nil) + sysfatal("dsapuballoc"); + return dsa; +} + +void +dsapubfree(DSApub *dsa) +{ + if(dsa == nil) + return; + mpfree(dsa->p); + mpfree(dsa->q); + mpfree(dsa->alpha); + mpfree(dsa->key); + free(dsa); +} + + +DSApriv* +dsaprivalloc(void) +{ + DSApriv *dsa; + + dsa = mallocz(sizeof(*dsa), 1); + if(dsa == nil) + sysfatal("dsaprivalloc"); + return dsa; +} + +void +dsaprivfree(DSApriv *dsa) +{ + if(dsa == nil) + return; + mpfree(dsa->pub.p); + mpfree(dsa->pub.q); + mpfree(dsa->pub.alpha); + mpfree(dsa->pub.key); + mpfree(dsa->secret); + free(dsa); +} + +DSAsig* +dsasigalloc(void) +{ + DSAsig *dsa; + + dsa = mallocz(sizeof(*dsa), 1); + if(dsa == nil) + sysfatal("dsasigalloc"); + return dsa; +} + +void +dsasigfree(DSAsig *dsa) +{ + if(dsa == nil) + return; + mpfree(dsa->r); + mpfree(dsa->s); + free(dsa); +} diff --git a/src/libsec/port/dsagen.c b/src/libsec/port/dsagen.c new file mode 100644 index 00000000..46c369e1 --- /dev/null +++ b/src/libsec/port/dsagen.c @@ -0,0 +1,58 @@ +#include "os.h" +#include +#include + +DSApriv* +dsagen(DSApub *opub) +{ + DSApub *pub; + DSApriv *priv; + mpint *exp; + mpint *g; + mpint *r; + int bits; + + priv = dsaprivalloc(); + pub = &priv->pub; + + if(opub != nil){ + pub->p = mpcopy(opub->p); + pub->q = mpcopy(opub->q); + } else { + pub->p = mpnew(0); + pub->q = mpnew(0); + DSAprimes(pub->q, pub->p, nil); + } + bits = Dbits*pub->p->top; + + pub->alpha = mpnew(0); + pub->key = mpnew(0); + priv->secret = mpnew(0); + + // find a generator alpha of the multiplicative + // group Z*p, i.e., of order n = p-1. We use the + // fact that q divides p-1 to reduce the exponent. + exp = mpnew(0); + g = mpnew(0); + r = mpnew(0); + mpsub(pub->p, mpone, exp); + mpdiv(exp, pub->q, exp, r); + if(mpcmp(r, mpzero) != 0) + sysfatal("dsagen foul up"); + while(1){ + mprand(bits, genrandom, g); + mpmod(g, pub->p, g); + mpexp(g, exp, pub->p, pub->alpha); + if(mpcmp(pub->alpha, mpone) != 0) + break; + } + mpfree(g); + mpfree(exp); + + // create the secret key + mprand(bits, genrandom, priv->secret); + mpmod(priv->secret, pub->p, priv->secret); + mpexp(pub->alpha, priv->secret, pub->p, pub->key); + + return priv; +} diff --git a/src/libsec/port/dsaprimes.c b/src/libsec/port/dsaprimes.c new file mode 100644 index 00000000..ff1dd5d8 --- /dev/null +++ b/src/libsec/port/dsaprimes.c @@ -0,0 +1,97 @@ +#include "os.h" +#include +#include + +// NIST algorithm for generating DSA primes +// Menezes et al (1997) Handbook of Applied Cryptography, p.151 +// q is a 160-bit prime; p is a 1024-bit prime; q divides p-1 + +// arithmetic on unsigned ints mod 2**160, represented +// as 20-byte, little-endian uchar array + +static void +Hrand(uchar *s) +{ + ulong *u = (ulong*)s; + *u++ = fastrand(); + *u++ = fastrand(); + *u++ = fastrand(); + *u++ = fastrand(); + *u = fastrand(); +} + +static void +Hincr(uchar *s) +{ + int i; + for(i=0; i<20; i++) + if(++s[i]!=0) + break; +} + +// this can run for quite a while; be patient +void +DSAprimes(mpint *q, mpint *p, uchar seed[SHA1dlen]) +{ + int i, j, k, n = 6, b = 63; + uchar s[SHA1dlen], Hs[SHA1dlen], Hs1[SHA1dlen], sj[SHA1dlen], sjk[SHA1dlen]; + mpint *two1023, *mb, *Vk, *W, *X, *q2; + + two1023 = mpnew(1024); + mpleft(mpone, 1023, two1023); + mb = mpnew(0); + mpleft(mpone, b, mb); + W = mpnew(1024); + Vk = mpnew(1024); + X = mpnew(0); + q2 = mpnew(0); +forever: + do{ + Hrand(s); + memcpy(sj, s, 20); + sha1(s, 20, Hs, 0); + Hincr(sj); + sha1(sj, 20, Hs1, 0); + for(i=0; i<20; i++) + Hs[i] ^= Hs1[i]; + Hs[0] |= 1; + Hs[19] |= 0x80; + letomp(Hs, 20, q); + }while(!probably_prime(q, 18)); + if(seed != nil) // allow skeptics to confirm computation + memmove(seed, s, SHA1dlen); + i = 0; + j = 2; + Hincr(sj); + mpleft(q, 1, q2); + while(i<4096){ + memcpy(sjk, sj, 20); + for(k=0; k <= n; k++){ + sha1(sjk, 20, Hs, 0); + letomp(Hs, 20, Vk); + if(k == n) + mpmod(Vk, mb, Vk); + mpleft(Vk, 160*k, Vk); + mpadd(W, Vk, W); + Hincr(sjk); + } + mpadd(W, two1023, X); + mpmod(X, q2, W); + mpsub(W, mpone, W); + mpsub(X, W, p); + if(mpcmp(p, two1023)>=0 && probably_prime(p, 5)) + goto done; + i += 1; + j += n+1; + for(k=0; k +#include + +DSApub* +dsaprivtopub(DSApriv *priv) +{ + DSApub *pub; + + pub = dsapuballoc(); + pub->p = mpcopy(priv->pub.p); + pub->q = mpcopy(priv->pub.q); + pub->alpha = mpcopy(priv->pub.alpha); + pub->key = mpcopy(priv->pub.key); + return pub; +} diff --git a/src/libsec/port/dsasign.c b/src/libsec/port/dsasign.c new file mode 100644 index 00000000..137134be --- /dev/null +++ b/src/libsec/port/dsasign.c @@ -0,0 +1,52 @@ +#include "os.h" +#include +#include + +DSAsig* +dsasign(DSApriv *priv, mpint *m) +{ + DSApub *pub = &priv->pub; + DSAsig *sig; + mpint *qm1, *k, *kinv, *r, *s; + mpint *q = pub->q, *p = pub->p, *alpha = pub->alpha; + int qlen = mpsignif(q); + + qm1 = mpnew(0); + kinv = mpnew(0); + r = mpnew(0); + s = mpnew(0); + k = mpnew(0); + mpsub(pub->q, mpone, qm1); + + // find a k that has an inverse mod q + while(1){ + mprand(qlen, genrandom, k); + if((mpcmp(mpone, k) > 0) || (mpcmp(k, pub->q) >= 0)) + continue; + mpextendedgcd(k, q, r, kinv, s); + if(mpcmp(r, mpone) != 0) + sysfatal("dsasign: pub->q not prime"); + break; + } + + // make kinv positive + mpmod(kinv, pub->q, kinv); + + // r = ((alpha**k) mod p) mod q + mpexp(alpha, k, p, r); + mpmod(r, q, r); + + // s = (kinv*(m + ar)) mod q + mpmul(r, priv->secret, s); + mpadd(s, m, s); + mpmul(s, kinv, s); + mpmod(s, q, s); + + sig = dsasigalloc(); + sig->r = r; + sig->s = s; + mpfree(qm1); + mpfree(k); + mpfree(kinv); + return sig; +} diff --git a/src/libsec/port/dsaverify.c b/src/libsec/port/dsaverify.c new file mode 100644 index 00000000..70e7f3cb --- /dev/null +++ b/src/libsec/port/dsaverify.c @@ -0,0 +1,46 @@ +#include "os.h" +#include +#include + +int +dsaverify(DSApub *pub, DSAsig *sig, mpint *m) +{ + int rv = -1; + mpint *u1, *u2, *v, *sinv; + + if(mpcmp(sig->r, mpone) < 0 || mpcmp(sig->r, pub->q) >= 0) + return rv; + if(mpcmp(sig->s, mpone) < 0 || mpcmp(sig->s, pub->q) >= 0) + return rv; + u1 = mpnew(0); + u2 = mpnew(0); + v = mpnew(0); + sinv = mpnew(0); + + // find (s**-1) mod q, make sure it exists + mpextendedgcd(sig->s, pub->q, u1, sinv, v); + if(mpcmp(u1, mpone) != 0) + goto out; + + // u1 = (sinv * m) mod q, u2 = (r * sinv) mod q + mpmul(sinv, m, u1); + mpmod(u1, pub->q, u1); + mpmul(sig->r, sinv, u2); + mpmod(u2, pub->q, u2); + + // v = (((alpha**u1)*(key**u2)) mod p) mod q + mpexp(pub->alpha, u1, pub->p, sinv); + mpexp(pub->key, u2, pub->p, v); + mpmul(sinv, v, v); + mpmod(v, pub->p, v); + mpmod(v, pub->q, v); + + if(mpcmp(v, sig->r) == 0) + rv = 0; +out: + mpfree(v); + mpfree(u1); + mpfree(u2); + mpfree(sinv); + return rv; +} diff --git a/src/libsec/port/egalloc.c b/src/libsec/port/egalloc.c new file mode 100644 index 00000000..3f0753da --- /dev/null +++ b/src/libsec/port/egalloc.c @@ -0,0 +1,70 @@ +#include "os.h" +#include +#include + +EGpub* +egpuballoc(void) +{ + EGpub *eg; + + eg = mallocz(sizeof(*eg), 1); + if(eg == nil) + sysfatal("egpuballoc"); + return eg; +} + +void +egpubfree(EGpub *eg) +{ + if(eg == nil) + return; + mpfree(eg->p); + mpfree(eg->alpha); + mpfree(eg->key); + free(eg); +} + + +EGpriv* +egprivalloc(void) +{ + EGpriv *eg; + + eg = mallocz(sizeof(*eg), 1); + if(eg == nil) + sysfatal("egprivalloc"); + return eg; +} + +void +egprivfree(EGpriv *eg) +{ + if(eg == nil) + return; + mpfree(eg->pub.p); + mpfree(eg->pub.alpha); + mpfree(eg->pub.key); + mpfree(eg->secret); + free(eg); +} + +EGsig* +egsigalloc(void) +{ + EGsig *eg; + + eg = mallocz(sizeof(*eg), 1); + if(eg == nil) + sysfatal("egsigalloc"); + return eg; +} + +void +egsigfree(EGsig *eg) +{ + if(eg == nil) + return; + mpfree(eg->r); + mpfree(eg->s); + free(eg); +} diff --git a/src/libsec/port/egdecrypt.c b/src/libsec/port/egdecrypt.c new file mode 100644 index 00000000..24578800 --- /dev/null +++ b/src/libsec/port/egdecrypt.c @@ -0,0 +1,28 @@ +#include "os.h" +#include +#include + +mpint* +egdecrypt(EGpriv *priv, mpint *in, mpint *out) +{ + EGpub *pub = &priv->pub; + mpint *gamma, *delta; + mpint *p = pub->p; + int plen = mpsignif(p)+1; + int shift = ((plen+Dbits-1)/Dbits)*Dbits; + + if(out == nil) + out = mpnew(0); + gamma = mpnew(0); + delta = mpnew(0); + mpright(in, shift, gamma); + mpleft(gamma, shift, delta); + mpsub(in, delta, delta); + mpexp(gamma, priv->secret, p, out); + mpinvert(out, p, gamma); + mpmul(gamma, delta, out); + mpmod(out, p, out); + mpfree(gamma); + mpfree(delta); + return out; +} diff --git a/src/libsec/port/egencrypt.c b/src/libsec/port/egencrypt.c new file mode 100644 index 00000000..9b6b12c6 --- /dev/null +++ b/src/libsec/port/egencrypt.c @@ -0,0 +1,38 @@ +#include "os.h" +#include +#include + +mpint* +egencrypt(EGpub *pub, mpint *in, mpint *out) +{ + mpint *m, *k, *gamma, *delta, *pm1; + mpint *p = pub->p, *alpha = pub->alpha; + int plen = mpsignif(p); + int shift = ((plen+Dbits)/Dbits)*Dbits; + // in libcrypt version, (int)(LENGTH(pub->p)*sizeof(NumType)*CHARBITS); + + if(out == nil) + out = mpnew(0); + pm1 = mpnew(0); + m = mpnew(0); + gamma = mpnew(0); + delta = mpnew(0); + mpmod(in, p, m); + while(1){ + k = mprand(plen, genrandom, nil); + if((mpcmp(mpone, k) <= 0) && (mpcmp(k, pm1) < 0)) + break; + } + mpexp(alpha, k, p, gamma); + mpexp(pub->key, k, p, delta); + mpmul(m, delta, delta); + mpmod(delta, p, delta); + mpleft(gamma, shift, out); + mpadd(delta, out, out); + mpfree(pm1); + mpfree(m); + mpfree(k); + mpfree(gamma); + mpfree(delta); + return out; +} diff --git a/src/libsec/port/eggen.c b/src/libsec/port/eggen.c new file mode 100644 index 00000000..9ea7d998 --- /dev/null +++ b/src/libsec/port/eggen.c @@ -0,0 +1,21 @@ +#include "os.h" +#include +#include + +EGpriv* +eggen(int nlen, int rounds) +{ + EGpub *pub; + EGpriv *priv; + + priv = egprivalloc(); + pub = &priv->pub; + pub->p = mpnew(0); + pub->alpha = mpnew(0); + pub->key = mpnew(0); + priv->secret = mpnew(0); + gensafeprime(pub->p, pub->alpha, nlen, rounds); + mprand(nlen-1, genrandom, priv->secret); + mpexp(pub->alpha, priv->secret, pub->p, pub->key); + return priv; +} diff --git a/src/libsec/port/egprivtopub.c b/src/libsec/port/egprivtopub.c new file mode 100644 index 00000000..e22c5c31 --- /dev/null +++ b/src/libsec/port/egprivtopub.c @@ -0,0 +1,17 @@ +#include "os.h" +#include +#include + +EGpub* +egprivtopub(EGpriv *priv) +{ + EGpub *pub; + + pub = egpuballoc(); + if(pub == nil) + return nil; + pub->p = mpcopy(priv->pub.p); + pub->alpha = mpcopy(priv->pub.alpha); + pub->key = mpcopy(priv->pub.key); + return pub; +} diff --git a/src/libsec/port/egsign.c b/src/libsec/port/egsign.c new file mode 100644 index 00000000..10540041 --- /dev/null +++ b/src/libsec/port/egsign.c @@ -0,0 +1,43 @@ +#include "os.h" +#include +#include + +EGsig* +egsign(EGpriv *priv, mpint *m) +{ + EGpub *pub = &priv->pub; + EGsig *sig; + mpint *pm1, *k, *kinv, *r, *s; + mpint *p = pub->p, *alpha = pub->alpha; + int plen = mpsignif(p); + + pm1 = mpnew(0); + kinv = mpnew(0); + r = mpnew(0); + s = mpnew(0); + k = mpnew(0); + mpsub(p, mpone, pm1); + while(1){ + mprand(plen, genrandom, k); + if((mpcmp(mpone, k) > 0) || (mpcmp(k, pm1) >= 0)) + continue; + mpextendedgcd(k, pm1, r, kinv, s); + if(mpcmp(r, mpone) != 0) + continue; + break; + } + mpmod(kinv, pm1, kinv); // make kinv positive + mpexp(alpha, k, p, r); + mpmul(priv->secret, r, s); + mpmod(s, pm1, s); + mpsub(m, s, s); + mpmul(kinv, s, s); + mpmod(s, pm1, s); + sig = egsigalloc(); + sig->r = r; + sig->s = s; + mpfree(pm1); + mpfree(k); + mpfree(kinv); + return sig; +} diff --git a/src/libsec/port/egtest.c b/src/libsec/port/egtest.c new file mode 100644 index 00000000..41b438dc --- /dev/null +++ b/src/libsec/port/egtest.c @@ -0,0 +1,34 @@ +#include "os.h" +#include +#include + +void +main(void) +{ + EGpriv *sk; + mpint *m, *gamma, *delta, *in, *out; + int plen, shift; + + fmtinstall('B', mpconv); + + sk = egprivalloc(); + sk->pub.p = uitomp(2357, nil); + sk->pub.alpha = uitomp(2, nil); + sk->pub.key = uitomp(1185, nil); + sk->secret = uitomp(1751, nil); + + m = uitomp(2035, nil); + + plen = mpsignif(sk->pub.p)+1; + shift = ((plen+Dbits-1)/Dbits)*Dbits; + gamma = uitomp(1430, nil); + delta = uitomp(697, nil); + out = mpnew(0); + in = mpnew(0); + mpleft(gamma, shift, in); + mpadd(delta, in, in); + egdecrypt(sk, in, out); + + if(mpcmp(m, out) != 0) + print("decrypt failed to recover message\n"); +} diff --git a/src/libsec/port/egverify.c b/src/libsec/port/egverify.c new file mode 100644 index 00000000..29a95156 --- /dev/null +++ b/src/libsec/port/egverify.c @@ -0,0 +1,29 @@ +#include "os.h" +#include +#include + +int +egverify(EGpub *pub, EGsig *sig, mpint *m) +{ + mpint *p = pub->p, *alpha = pub->alpha; + mpint *r = sig->r, *s = sig->s; + mpint *v1, *v2, *rs; + int rv = -1; + + if(mpcmp(r, mpone) < 0 || mpcmp(r, p) >= 0) + return rv; + v1 = mpnew(0); + rs = mpnew(0); + v2 = mpnew(0); + mpexp(pub->key, r, p, v1); + mpexp(r, s, p, rs); + mpmul(v1, rs, v1); + mpmod(v1, p, v1); + mpexp(alpha, m, p, v2); + if(mpcmp(v1, v2) == 0) + rv = 0; + mpfree(v1); + mpfree(rs); + mpfree(v2); + return rv; +} diff --git a/src/libsec/port/genprime.c b/src/libsec/port/genprime.c new file mode 100644 index 00000000..c0e16d92 --- /dev/null +++ b/src/libsec/port/genprime.c @@ -0,0 +1,27 @@ +#include "os.h" +#include +#include + +// generate a probable prime. accuracy is the miller-rabin interations +void +genprime(mpint *p, int n, int accuracy) +{ + mpdigit x; + + // generate n random bits with high and low bits set + mpbits(p, n); + genrandom((uchar*)p->p, (n+7)/8); + p->top = (n+Dbits-1)/Dbits; + x = 1; + x <<= ((n-1)%Dbits); + p->p[p->top-1] &= (x-1); + p->p[p->top-1] |= x; + p->p[0] |= 1; + + // keep icrementing till it looks prime + for(;;){ + if(probably_prime(p, accuracy)) + break; + mpadd(p, mptwo, p); + } +} diff --git a/src/libsec/port/gensafeprime.c b/src/libsec/port/gensafeprime.c new file mode 100644 index 00000000..e95c94c9 --- /dev/null +++ b/src/libsec/port/gensafeprime.c @@ -0,0 +1,36 @@ +#include "os.h" +#include +#include + +// find a prime p of length n and a generator alpha of Z^*_p +// Alg 4.86 Menezes et al () Handbook, p.164 +void +gensafeprime(mpint *p, mpint *alpha, int n, int accuracy) +{ + mpint *q, *b; + + q = mpnew(n-1); + while(1){ + genprime(q, n-1, accuracy); + mpleft(q, 1, p); + mpadd(p, mpone, p); // p = 2*q+1 + if(probably_prime(p, accuracy)) + break; + } + // now find a generator alpha of the multiplicative + // group Z*_p of order p-1=2q + b = mpnew(0); + while(1){ + mprand(n, genrandom, alpha); + mpmod(alpha, p, alpha); + mpmul(alpha, alpha, b); + mpmod(b, p, b); + if(mpcmp(b, mpone) == 0) + continue; + mpexp(alpha, q, p, b); + if(mpcmp(b, mpone) != 0) + break; + } + mpfree(b); + mpfree(q); +} diff --git a/src/libsec/port/genstrongprime.c b/src/libsec/port/genstrongprime.c new file mode 100644 index 00000000..27c43a96 --- /dev/null +++ b/src/libsec/port/genstrongprime.c @@ -0,0 +1,57 @@ +#include "os.h" +#include +#include + +// Gordon's algorithm for generating a strong prime +// Menezes et al () Handbook, p.150 +void +genstrongprime(mpint *p, int n, int accuracy) +{ + mpint *s, *t, *r, *i; + + if(n < 64) + n = 64; + + s = mpnew(n/2); + genprime(s, (n/2)-16, accuracy); + t = mpnew(n/2); + genprime(t, n-mpsignif(s)-32, accuracy); + + // first r = 2it + 1 that's prime + i = mpnew(16); + r = mpnew(0); + itomp(0x8000, i); + mpleft(t, 1, t); // 2t + mpmul(i, t, r); // 2it + mpadd(r, mpone, r); // 2it + 1 + for(;;){ + if(probably_prime(r, 18)) + break; + mpadd(r, t, r); // r += 2t + } + + // p0 = 2(s**(r-2) mod r)s - 1 + itomp(2, p); + mpsub(r, p, p); + mpexp(s, p, r, p); + mpmul(s, p, p); + mpleft(p, 1, p); + mpsub(p, mpone, p); + + // first p = p0 + 2irs that's prime + itomp(0x8000, i); + mpleft(r, 1, r); // 2r + mpmul(r, s, r); // 2rs + mpmul(r, i, i); // 2irs + mpadd(p, i, p); // p0 + 2irs + for(;;){ + if(probably_prime(p, accuracy)) + break; + mpadd(p, r, p); // p += 2rs + } + + mpfree(i); + mpfree(s); + mpfree(r); + mpfree(t); +} diff --git a/src/libsec/port/hmac.c b/src/libsec/port/hmac.c new file mode 100644 index 00000000..c7239738 --- /dev/null +++ b/src/libsec/port/hmac.c @@ -0,0 +1,56 @@ +#include "os.h" +#include + +/* rfc2104 */ +static DigestState* +hmac_x(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s, + DigestState*(*x)(uchar*, ulong, uchar*, DigestState*), int xlen) +{ + int i; + uchar pad[65], innerdigest[256]; + + if(xlen > sizeof(innerdigest)) + return nil; + + if(klen>64) + return nil; + + /* first time through */ + if(s == nil){ + for(i=0; i<64; i++) + pad[i] = 0x36; + pad[64] = 0; + for(i=0; i +#include + +uchar key[] = "Jefe"; +uchar data[] = "what do ya want for nothing?"; + +void +main(void) +{ + int i; + uchar hash[MD5dlen]; + + hmac_md5(data, strlen((char*)data), key, 4, hash, nil); + for(i=0; i + +/* + * This MD4 is implemented from the description in Stinson's Cryptography, + * theory and practice. -- presotto + */ + +/* + * Rotate ammounts used in the algorithm + */ +enum +{ + S11= 3, + S12= 7, + S13= 11, + S14= 19, + + S21= 3, + S22= 5, + S23= 9, + S24= 13, + + S31= 3, + S32= 9, + S33= 11, + S34= 15, +}; + +typedef struct MD4Table MD4Table; +struct MD4Table +{ + uchar x; /* index into data block */ + uchar rot; /* amount to rotate left by */ +}; + +static MD4Table tab[] = +{ + /* round 1 */ +/*[0]*/ { 0, S11}, + { 1, S12}, + { 2, S13}, + { 3, S14}, + { 4, S11}, + { 5, S12}, + { 6, S13}, + { 7, S14}, + { 8, S11}, + { 9, S12}, + { 10, S13}, + { 11, S14}, + { 12, S11}, + { 13, S12}, + { 14, S13}, + { 15, S14}, + + /* round 2 */ +/*[16]*/{ 0, S21}, + { 4, S22}, + { 8, S23}, + { 12, S24}, + { 1, S21}, + { 5, S22}, + { 9, S23}, + { 13, S24}, + { 2, S21}, + { 6, S22}, + { 10, S23}, + { 14, S24}, + { 3, S21}, + { 7, S22}, + { 11, S23}, + { 15, S24}, + + /* round 3 */ +/*[32]*/{ 0, S31}, + { 8, S32}, + { 4, S33}, + { 12, S34}, + { 2, S31}, + { 10, S32}, + { 6, S33}, + { 14, S34}, + { 1, S31}, + { 9, S32}, + { 5, S33}, + { 13, S34}, + { 3, S31}, + { 11, S32}, + { 7, S33}, + { 15, S34}, +}; + +static void encode(uchar*, u32int*, ulong); +static void decode(u32int*, uchar*, ulong); + +static void +md4block(uchar *p, ulong len, MD4state *s) +{ + int i; + u32int a, b, c, d, tmp; + MD4Table *t; + uchar *end; + u32int x[16]; + + for(end = p+len; p < end; p += 64){ + a = s->state[0]; + b = s->state[1]; + c = s->state[2]; + d = s->state[3]; + + decode(x, p, 64); + + for(i = 0; i < 48; i++){ + t = tab + i; + switch(i>>4){ + case 0: + a += (b & c) | (~b & d); + break; + case 1: + a += ((b & c) | (b & d) | (c & d)) + 0x5A827999; + break; + case 2: + a += (b ^ c ^ d) + 0x6ED9EBA1; + break; + } + a += x[t->x]; + a = (a << t->rot) | (a >> (32 - t->rot)); + + /* rotate variables */ + tmp = d; + d = c; + c = b; + b = a; + a = tmp; + } + + s->state[0] += a; + s->state[1] += b; + s->state[2] += c; + s->state[3] += d; + + s->len += 64; + } +} + +MD4state* +md4(uchar *p, ulong len, uchar *digest, MD4state *s) +{ + u32int x[16]; + uchar buf[128]; + int i; + uchar *e; + + if(s == nil){ + s = malloc(sizeof(*s)); + if(s == nil) + return nil; + memset(s, 0, sizeof(*s)); + s->malloced = 1; + } + + if(s->seeded == 0){ + /* seed the state, these constants would look nicer big-endian */ + s->state[0] = 0x67452301; + s->state[1] = 0xefcdab89; + s->state[2] = 0x98badcfe; + s->state[3] = 0x10325476; + s->seeded = 1; + } + + /* fill out the partial 64 byte block from previous calls */ + if(s->blen){ + i = 64 - s->blen; + if(len < i) + i = len; + memmove(s->buf + s->blen, p, i); + len -= i; + s->blen += i; + p += i; + if(s->blen == 64){ + md4block(s->buf, s->blen, s); + s->blen = 0; + } + } + + /* do 64 byte blocks */ + i = len & ~0x3f; + if(i){ + md4block(p, i, s); + len -= i; + p += i; + } + + /* save the left overs if not last call */ + if(digest == 0){ + if(len){ + memmove(s->buf, p, len); + s->blen += len; + } + return s; + } + + /* + * this is the last time through, pad what's left with 0x80, + * 0's, and the input count to create a multiple of 64 bytes + */ + if(s->blen){ + p = s->buf; + len = s->blen; + } else { + memmove(buf, p, len); + p = buf; + } + s->len += len; + e = p + len; + if(len < 56) + i = 56 - len; + else + i = 120 - len; + memset(e, 0, i); + *e = 0x80; + len += i; + + /* append the count */ + x[0] = s->len<<3; + x[1] = s->len>>29; + encode(p+len, x, 8); + + /* digest the last part */ + md4block(p, len+8, s); + + /* return result and free state */ + encode(digest, s->state, MD4dlen); + if(s->malloced == 1) + free(s); + return nil; +} + +/* + * encodes input (u32int) into output (uchar). Assumes len is + * a multiple of 4. + */ +static void +encode(uchar *output, u32int *input, ulong len) +{ + u32int x; + uchar *e; + + for(e = output + len; output < e;) { + x = *input++; + *output++ = x; + *output++ = x >> 8; + *output++ = x >> 16; + *output++ = x >> 24; + } +} + +/* + * decodes input (uchar) into output (u32int). Assumes len is + * a multiple of 4. + */ +static void +decode(u32int *output, uchar *input, ulong len) +{ + uchar *e; + + for(e = input+len; input < e; input += 4) + *output++ = input[0] | (input[1] << 8) | + (input[2] << 16) | (input[3] << 24); +} diff --git a/src/libsec/port/md4test.c b/src/libsec/port/md4test.c new file mode 100644 index 00000000..417cb333 --- /dev/null +++ b/src/libsec/port/md4test.c @@ -0,0 +1,31 @@ +#include "os.h" +#include +#include + +char *tests[] = { + "", + "a", + "abc", + "message digest", + "abcdefghijklmnopqrstuvwxyz", + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", + "12345678901234567890123456789012345678901234567890123456789012345678901234567890", + 0 +}; + +void +main(void) +{ + char **pp; + uchar *p; + int i; + uchar digest[MD5dlen]; + + for(pp = tests; *pp; pp++){ + p = (uchar*)*pp; + md4(p, strlen(*pp), digest, 0); + for(i = 0; i < MD5dlen; i++) + print("%2.2ux", digest[i]); + print("\n"); + } +} diff --git a/src/libsec/port/md5pickle.c b/src/libsec/port/md5pickle.c new file mode 100644 index 00000000..5b353b5a --- /dev/null +++ b/src/libsec/port/md5pickle.c @@ -0,0 +1,37 @@ +#include "os.h" +#include + +char* +md5pickle(MD5state *s) +{ + char *p; + int m, n; + + m = 4*9+4*((s->blen+3)/3); + p = malloc(m); + if(p == nil) + return p; + n = sprint(p, "%8.8ux %8.8ux %8.8ux %8.8ux ", + s->state[0], s->state[1], s->state[2], + s->state[3]); + enc64(p+n, m-n, s->buf, s->blen); + return p; +} + +MD5state* +md5unpickle(char *p) +{ + MD5state *s; + + s = malloc(sizeof(*s)); + if(s == nil) + return nil; + s->state[0] = strtoul(p, &p, 16); + s->state[1] = strtoul(p, &p, 16); + s->state[2] = strtoul(p, &p, 16); + s->state[3] = strtoul(p, &p, 16); + s->blen = dec64(s->buf, sizeof(s->buf), p, strlen(p)); + s->malloced = 1; + s->seeded = 1; + return s; +} diff --git a/src/libsec/port/nfastrand.c b/src/libsec/port/nfastrand.c new file mode 100644 index 00000000..3ba77003 --- /dev/null +++ b/src/libsec/port/nfastrand.c @@ -0,0 +1,23 @@ +#include +#include +#include + +#define Maxrand ((1UL<<31)-1) + +ulong +nfastrand(ulong n) +{ + ulong m, r; + + /* + * set m to the maximum multiple of n <= 2^31-1 + * so we want a random number < m. + */ + if(n > Maxrand) + sysfatal("nfastrand: n too large"); + + m = Maxrand - Maxrand % n; + while((r = fastrand()) >= m) + ; + return r%n; +} diff --git a/src/libsec/port/primetest.c b/src/libsec/port/primetest.c new file mode 100644 index 00000000..2d082e64 --- /dev/null +++ b/src/libsec/port/primetest.c @@ -0,0 +1,41 @@ +#include "os.h" +#include +#include + +void +main(void) +{ + mpint *z = mpnew(0); + mpint *p = mpnew(0); + mpint *q = mpnew(0); + mpint *nine = mpnew(0); + + fmtinstall('B', mpconv); + strtomp("2492491", nil, 16, z); // 38347921 = x*y = (2**28-9)/7, + // an example of 3**(n-1)=1 mod n + strtomp("15662C00E811", nil, 16, p);// 23528569104401, a prime + uitomp(9, nine); + + if(probably_prime(z, 5) == 1) + fprint(2, "tricked primality test\n"); + if(probably_prime(nine, 5) == 1) + fprint(2, "9 passed primality test!\n"); + if(probably_prime(p, 25) == 1) + fprint(2, "ok\n"); + + DSAprimes(q, p, nil); + print("q=%B\np=%B\n", q, p); + + exits(0); +} + +// example output, checked with Maple: +// seed EB7B6E35F7CD37B511D96C67D6688CC4DD440E1E +// q=E0F0EF284E10796C5A2A511E94748BA03C795C13 +// = 1284186945063585093695748280224501481698995297299 +// p=C41CFBE4D4846F67A3DF7DE9921A49D3B42DC33728427AB159CEC8CBBDB12B5F0C244F1A734AEB9840804EA3C25036AD1B61AFF3ABBC247CD4B384224567A863A6F020E7EE9795554BCD08ABAD7321AF27E1E92E3DB1C6E7E94FAAE590AE9C48F96D93D178E809401ABE8A534A1EC44359733475A36A70C7B425125062B1142D +// = 137715385439333164327584575331308277462546592976152006175830654712456008630139443747529133857837818585400418619916530061955288983751958831927807888408309879880101870216437711393638413509484569804814373511469405934988856674935304074081350525593807908358867354528898618574659752879015380013845760006721861915693 +// r=DF310F4E54A5FEC5D86D3E14863921E834113E060F90052AD332B3241CEF2497EFA0303D6344F7C819691A0F9C4A773815AF8EAECFB7EC1D98F039F17A32A7E887D97251A927D093F44A55577F4D70444AEBD06B9B45695EC23962B175F266895C67D21C4656848614D888A4 +// = 107239359478548771267308764204625458348785444483302647285245969203446101233421655396874997253111222983406676955642093641709149748793954493558324738441197139556917622937892491175016280660608595599724194374948056515856812347094848443460715881455884639869144172708 +// g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diff --git a/src/libsec/port/prng.c b/src/libsec/port/prng.c new file mode 100644 index 00000000..fc2e508a --- /dev/null +++ b/src/libsec/port/prng.c @@ -0,0 +1,15 @@ +#include "os.h" +#include +#include + +// +// just use the libc prng to fill a buffer +// +void +prng(uchar *p, int n) +{ + uchar *e; + + for(e = p+n; p < e; p++) + *p = rand(); +} diff --git a/src/libsec/port/probably_prime.c b/src/libsec/port/probably_prime.c new file mode 100644 index 00000000..4eaccbad --- /dev/null +++ b/src/libsec/port/probably_prime.c @@ -0,0 +1,84 @@ +#include "os.h" +#include +#include + +// Miller-Rabin probabilistic primality testing +// Knuth (1981) Seminumerical Algorithms, p.379 +// Menezes et al () Handbook, p.39 +// 0 if composite; 1 if almost surely prime, Pr(err)<1/4**nrep +int +probably_prime(mpint *n, int nrep) +{ + int j, k, rep, nbits, isprime = 1; + mpint *nm1, *q, *x, *y, *r; + + if(n->sign < 0) + sysfatal("negative prime candidate"); + + if(nrep <= 0) + nrep = 18; + + k = mptoi(n); + if(k == 2) // 2 is prime + return 1; + if(k < 2) // 1 is not prime + return 0; + if((n->p[0] & 1) == 0) // even is not prime + return 0; + + // test against small prime numbers + if(smallprimetest(n) < 0) + return 0; + + // fermat test, 2^n mod n == 2 if p is prime + x = uitomp(2, nil); + y = mpnew(0); + mpexp(x, n, n, y); + k = mptoi(y); + if(k != 2){ + mpfree(x); + mpfree(y); + return 0; + } + + nbits = mpsignif(n); + nm1 = mpnew(nbits); + mpsub(n, mpone, nm1); // nm1 = n - 1 */ + k = mplowbits0(nm1); + q = mpnew(0); + mpright(nm1, k, q); // q = (n-1)/2**k + + for(rep = 0; rep < nrep; rep++){ + + // x = random in [2, n-2] + r = mprand(nbits, prng, nil); + mpmod(r, nm1, x); + mpfree(r); + if(mpcmp(x, mpone) <= 0) + continue; + + // y = x**q mod n + mpexp(x, q, n, y); + + if(mpcmp(y, mpone) == 0 || mpcmp(y, nm1) == 0) + goto done; + + for(j = 1; j < k; j++){ + mpmul(y, y, x); + mpmod(x, n, y); // y = y*y mod n + if(mpcmp(y, nm1) == 0) + goto done; + if(mpcmp(y, mpone) == 0){ + isprime = 0; + goto done; + } + } + isprime = 0; + } +done: + mpfree(y); + mpfree(x); + mpfree(q); + mpfree(nm1); + return isprime; +} diff --git a/src/libsec/port/rc4.c b/src/libsec/port/rc4.c new file mode 100644 index 00000000..beafa486 --- /dev/null +++ b/src/libsec/port/rc4.c @@ -0,0 +1,104 @@ +#include "os.h" +#include + +void +setupRC4state(RC4state *key, uchar *start, int n) +{ + int t; + int index2; + uchar *state; + uchar *p, *e, *sp, *se; + + state = key->state; + se = &state[256]; + for(sp = state; sp < se; sp++) + *sp = sp - state; + + key->x = 0; + key->y = 0; + index2 = 0; + e = start + n; + p = start; + for(sp = state; sp < se; sp++) + { + t = *sp; + index2 = (*p + t + index2) & 255; + *sp = state[index2]; + state[index2] = t; + if(++p >= e) + p = start; + } +} + +void +rc4(RC4state *key, uchar *p, int len) +{ + int tx, ty; + int x, y; + uchar *state; + uchar *e; + + x = key->x; + y = key->y; + state = &key->state[0]; + for(e = p + len; p < e; p++) + { + x = (x+1)&255; + tx = state[x]; + y = (y+tx)&255; + ty = state[y]; + state[x] = ty; + state[y] = tx; + *p ^= state[(tx+ty)&255]; + } + key->x = x; + key->y = y; +} + +void +rc4skip(RC4state *key, int len) +{ + int tx, ty; + int x, y; + uchar *state; + int i; + + x = key->x; + y = key->y; + state = &key->state[0]; + for(i=0; ix = x; + key->y = y; +} + +void +rc4back(RC4state *key, int len) +{ + int tx, ty; + int x, y; + uchar *state; + int i; + + x = key->x; + y = key->y; + state = &key->state[0]; + for(i=0; ix = x; + key->y = y; +} diff --git a/src/libsec/port/readcert.c b/src/libsec/port/readcert.c new file mode 100644 index 00000000..9ba801f1 --- /dev/null +++ b/src/libsec/port/readcert.c @@ -0,0 +1,51 @@ +#include +#include +#include +#include +#include + +static char* +readfile(char *name) +{ + int fd; + char *s; + Dir *d; + + fd = open(name, OREAD); + if(fd < 0) + return nil; + if((d = dirfstat(fd)) == nil) + return nil; + s = malloc(d->length + 1); + if(s == nil || readn(fd, s, d->length) != d->length){ + free(s); + free(d); + close(fd); + return nil; + } + close(fd); + s[d->length] = '\0'; + free(d); + return s; +} + +uchar* +readcert(char *filename, int *pcertlen) +{ + char *pem; + uchar *binary; + + pem = readfile(filename); + if(pem == nil){ + werrstr("can't read %s", filename); + return nil; + } + binary = decodepem(pem, "CERTIFICATE", pcertlen); + free(pem); + if(binary == nil){ + werrstr("can't parse %s", filename); + return nil; + } + return binary; +} + diff --git a/src/libsec/port/rsaalloc.c b/src/libsec/port/rsaalloc.c new file mode 100644 index 00000000..0caa96d5 --- /dev/null +++ b/src/libsec/port/rsaalloc.c @@ -0,0 +1,52 @@ +#include "os.h" +#include +#include + +RSApub* +rsapuballoc(void) +{ + RSApub *rsa; + + rsa = mallocz(sizeof(*rsa), 1); + if(rsa == nil) + sysfatal("rsapuballoc"); + return rsa; +} + +void +rsapubfree(RSApub *rsa) +{ + if(rsa == nil) + return; + mpfree(rsa->ek); + mpfree(rsa->n); + free(rsa); +} + + +RSApriv* +rsaprivalloc(void) +{ + RSApriv *rsa; + + rsa = mallocz(sizeof(*rsa), 1); + if(rsa == nil) + sysfatal("rsaprivalloc"); + return rsa; +} + +void +rsaprivfree(RSApriv *rsa) +{ + if(rsa == nil) + return; + mpfree(rsa->pub.ek); + mpfree(rsa->pub.n); + mpfree(rsa->dk); + mpfree(rsa->p); + mpfree(rsa->q); + mpfree(rsa->kp); + mpfree(rsa->kq); + mpfree(rsa->c2); + free(rsa); +} diff --git a/src/libsec/port/rsadecrypt.c b/src/libsec/port/rsadecrypt.c new file mode 100644 index 00000000..1e937bec --- /dev/null +++ b/src/libsec/port/rsadecrypt.c @@ -0,0 +1,37 @@ +#include "os.h" +#include +#include + +// decrypt rsa using garner's algorithm for the chinese remainder theorem +// seminumerical algorithms, knuth, pp 253-254 +// applied cryptography, menezes et al, pg 612 +mpint* +rsadecrypt(RSApriv *rsa, mpint *in, mpint *out) +{ + mpint *v1, *v2; + + if(out == nil) + out = mpnew(0); + + // convert in to modular representation + v1 = mpnew(0); + mpmod(in, rsa->p, v1); + v2 = mpnew(0); + mpmod(in, rsa->q, v2); + + // exponentiate the modular rep + mpexp(v1, rsa->kp, rsa->p, v1); + mpexp(v2, rsa->kq, rsa->q, v2); + + // out = v1 + p*((v2-v1)*c2 mod q) + mpsub(v2, v1, v2); + mpmul(v2, rsa->c2, v2); + mpmod(v2, rsa->q, v2); + mpmul(v2, rsa->p, out); + mpadd(v1, out, out); + + mpfree(v1); + mpfree(v2); + + return out; +} diff --git a/src/libsec/port/rsaencrypt.c b/src/libsec/port/rsaencrypt.c new file mode 100644 index 00000000..ade686dc --- /dev/null +++ b/src/libsec/port/rsaencrypt.c @@ -0,0 +1,12 @@ +#include "os.h" +#include +#include + +mpint* +rsaencrypt(RSApub *rsa, mpint *in, mpint *out) +{ + if(out == nil) + out = mpnew(0); + mpexp(in, rsa->ek, rsa->n, out); + return out; +} diff --git a/src/libsec/port/rsafill.c b/src/libsec/port/rsafill.c new file mode 100644 index 00000000..f514b073 --- /dev/null +++ b/src/libsec/port/rsafill.c @@ -0,0 +1,61 @@ +#include "os.h" +#include +#include + +RSApriv* +rsafill(mpint *n, mpint *e, mpint *d, mpint *p, mpint *q) +{ + mpint *c2, *kq, *kp, *x; + RSApriv *rsa; + + // make sure we're not being hoodwinked + if(!probably_prime(p, 10) || !probably_prime(q, 10)){ + werrstr("rsafill: p or q not prime"); + return nil; + } + x = mpnew(0); + mpmul(p, q, x); + if(mpcmp(n, x) != 0){ + werrstr("rsafill: n != p*q"); + mpfree(x); + return nil; + } + c2 = mpnew(0); + mpsub(p, mpone, c2); + mpsub(q, mpone, x); + mpmul(c2, x, x); + mpmul(e, d, c2); + mpmod(c2, x, x); + if(mpcmp(x, mpone) != 0){ + werrstr("rsafill: e*d != 1 mod (p-1)*(q-1)"); + mpfree(x); + mpfree(c2); + return nil; + } + + // compute chinese remainder coefficient + mpinvert(p, q, c2); + + // for crt a**k mod p == (a**(k mod p-1)) mod p + kq = mpnew(0); + kp = mpnew(0); + mpsub(p, mpone, x); + mpmod(d, x, kp); + mpsub(q, mpone, x); + mpmod(d, x, kq); + + rsa = rsaprivalloc(); + rsa->pub.ek = mpcopy(e); + rsa->pub.n = mpcopy(n); + rsa->dk = mpcopy(d); + rsa->kp = kp; + rsa->kq = kq; + rsa->p = mpcopy(p); + rsa->q = mpcopy(q); + rsa->c2 = c2; + + mpfree(x); + + return rsa; +} + diff --git a/src/libsec/port/rsagen.c b/src/libsec/port/rsagen.c new file mode 100644 index 00000000..ebe1079d --- /dev/null +++ b/src/libsec/port/rsagen.c @@ -0,0 +1,70 @@ +#include "os.h" +#include +#include + +RSApriv* +rsagen(int nlen, int elen, int rounds) +{ + mpint *p, *q, *e, *d, *phi, *n, *t1, *t2, *kp, *kq, *c2; + RSApriv *rsa; + + p = mpnew(nlen/2); + q = mpnew(nlen/2); + n = mpnew(nlen); + e = mpnew(elen); + d = mpnew(0); + phi = mpnew(nlen); + + // create the prime factors and euclid's function + genprime(p, nlen/2, rounds); + genprime(q, nlen - mpsignif(p) + 1, rounds); + mpmul(p, q, n); + mpsub(p, mpone, e); + mpsub(q, mpone, d); + mpmul(e, d, phi); + + // find an e relatively prime to phi + t1 = mpnew(0); + t2 = mpnew(0); + mprand(elen, genrandom, e); + if(mpcmp(e,mptwo) <= 0) + itomp(3, e); + // See Menezes et al. p.291 "8.8 Note (selecting primes)" for discussion + // of the merits of various choices of primes and exponents. e=3 is a + // common and recommended exponent, but doesn't necessarily work here + // because we chose strong rather than safe primes. + for(;;){ + mpextendedgcd(e, phi, t1, d, t2); + if(mpcmp(t1, mpone) == 0) + break; + mpadd(mpone, e, e); + } + mpfree(t1); + mpfree(t2); + + // compute chinese remainder coefficient + c2 = mpnew(0); + mpinvert(p, q, c2); + + // for crt a**k mod p == (a**(k mod p-1)) mod p + kq = mpnew(0); + kp = mpnew(0); + mpsub(p, mpone, phi); + mpmod(d, phi, kp); + mpsub(q, mpone, phi); + mpmod(d, phi, kq); + + rsa = rsaprivalloc(); + rsa->pub.ek = e; + rsa->pub.n = n; + rsa->dk = d; + rsa->kp = kp; + rsa->kq = kq; + rsa->p = p; + rsa->q = q; + rsa->c2 = c2; + + mpfree(phi); + + return rsa; +} diff --git a/src/libsec/port/rsaprivtopub.c b/src/libsec/port/rsaprivtopub.c new file mode 100644 index 00000000..d464c87f --- /dev/null +++ b/src/libsec/port/rsaprivtopub.c @@ -0,0 +1,16 @@ +#include "os.h" +#include +#include + +RSApub* +rsaprivtopub(RSApriv *priv) +{ + RSApub *pub; + + pub = rsapuballoc(); + if(pub == nil) + return nil; + pub->n = mpcopy(priv->pub.n); + pub->ek = mpcopy(priv->pub.ek); + return pub; +} diff --git a/src/libsec/port/rsatest.c b/src/libsec/port/rsatest.c new file mode 100644 index 00000000..9ff66b5c --- /dev/null +++ b/src/libsec/port/rsatest.c @@ -0,0 +1,57 @@ +#include "os.h" +#include +#include +#include + +void +main(void) +{ + RSApriv *rsa; + Biobuf b; + char *p; + int n; + mpint *clr, *enc, *clr2; + uchar buf[4096]; + uchar *e; + vlong start; + + fmtinstall('B', mpconv); + + rsa = rsagen(1024, 16, 0); + if(rsa == nil) + sysfatal("rsagen"); + Binit(&b, 0, OREAD); + clr = mpnew(0); + clr2 = mpnew(0); + enc = mpnew(0); + + strtomp("123456789abcdef123456789abcdef123456789abcdef123456789abcdef", nil, 16, clr); + rsaencrypt(&rsa->pub, clr, enc); + + start = nsec(); + for(n = 0; n < 10; n++) + rsadecrypt(rsa, enc, clr); + print("%lld\n", nsec()-start); + + start = nsec(); + for(n = 0; n < 10; n++) + mpexp(enc, rsa->dk, rsa->pub.n, clr2); + print("%lld\n", nsec()-start); + + if(mpcmp(clr, clr2) != 0) + print("%B != %B\n", clr, clr2); + + print("> "); + while(p = Brdline(&b, '\n')){ + n = Blinelen(&b); + letomp((uchar*)p, n, clr); + print("clr %B\n", clr); + rsaencrypt(&rsa->pub, clr, enc); + print("enc %B\n", enc); + rsadecrypt(rsa, enc, clr); + print("clr %B\n", clr); + n = mptole(clr, buf, sizeof(buf), nil); + write(1, buf, n); + print("> "); + } +} diff --git a/src/libsec/port/sha1pickle.c b/src/libsec/port/sha1pickle.c new file mode 100644 index 00000000..6139567b --- /dev/null +++ b/src/libsec/port/sha1pickle.c @@ -0,0 +1,38 @@ +#include "os.h" +#include + +char* +sha1pickle(SHA1state *s) +{ + char *p; + int m, n; + + m = 5*9+4*((s->blen+3)/3); + p = malloc(m); + if(p == nil) + return p; + n = sprint(p, "%8.8ux %8.8ux %8.8ux %8.8ux %8.8ux ", + s->state[0], s->state[1], s->state[2], + s->state[3], s->state[4]); + enc64(p+n, m-n, s->buf, s->blen); + return p; +} + +SHA1state* +sha1unpickle(char *p) +{ + SHA1state *s; + + s = malloc(sizeof(*s)); + if(s == nil) + return nil; + s->state[0] = strtoul(p, &p, 16); + s->state[1] = strtoul(p, &p, 16); + s->state[2] = strtoul(p, &p, 16); + s->state[3] = strtoul(p, &p, 16); + s->state[4] = strtoul(p, &p, 16); + s->blen = dec64(s->buf, sizeof(s->buf), p, strlen(p)); + s->malloced = 1; + s->seeded = 1; + return s; +} diff --git a/src/libsec/port/smallprimes.c b/src/libsec/port/smallprimes.c new file mode 100644 index 00000000..ac23a2f0 --- /dev/null +++ b/src/libsec/port/smallprimes.c @@ -0,0 +1,1004 @@ +#include "os.h" + +ulong smallprimes[1000] = { + 2, + 3, + 5, + 7, + 11, + 13, + 17, + 19, + 23, + 29, + 31, + 37, + 41, + 43, + 47, + 53, + 59, + 61, + 67, + 71, + 73, + 79, + 83, + 89, + 97, + 101, + 103, + 107, + 109, + 113, + 127, + 131, + 137, + 139, + 149, + 151, + 157, + 163, + 167, + 173, + 179, + 181, + 191, + 193, + 197, + 199, + 211, + 223, + 227, + 229, + 233, + 239, + 241, + 251, + 257, + 263, + 269, + 271, + 277, + 281, + 283, + 293, + 307, + 311, + 313, + 317, + 331, + 337, + 347, + 349, + 353, + 359, + 367, + 373, + 379, + 383, + 389, + 397, + 401, + 409, + 419, + 421, + 431, + 433, + 439, + 443, + 449, + 457, + 461, + 463, + 467, + 479, + 487, + 491, + 499, + 503, + 509, + 521, + 523, + 541, + 547, + 557, + 563, + 569, + 571, + 577, + 587, + 593, + 599, + 601, + 607, + 613, + 617, + 619, + 631, + 641, + 643, + 647, + 653, + 659, + 661, + 673, + 677, + 683, + 691, + 701, + 709, + 719, + 727, + 733, + 739, + 743, + 751, + 757, + 761, + 769, + 773, + 787, + 797, + 809, + 811, + 821, + 823, + 827, + 829, + 839, + 853, + 857, + 859, + 863, + 877, + 881, + 883, + 887, + 907, + 911, + 919, + 929, + 937, + 941, + 947, + 953, + 967, + 971, + 977, + 983, + 991, + 997, + 1009, + 1013, + 1019, + 1021, + 1031, + 1033, + 1039, + 1049, + 1051, + 1061, + 1063, + 1069, + 1087, + 1091, + 1093, + 1097, + 1103, + 1109, + 1117, + 1123, + 1129, + 1151, + 1153, + 1163, + 1171, + 1181, + 1187, + 1193, + 1201, + 1213, + 1217, + 1223, + 1229, + 1231, + 1237, + 1249, + 1259, + 1277, + 1279, + 1283, + 1289, + 1291, + 1297, + 1301, + 1303, + 1307, + 1319, + 1321, + 1327, + 1361, + 1367, + 1373, + 1381, + 1399, + 1409, + 1423, + 1427, + 1429, + 1433, + 1439, + 1447, + 1451, + 1453, + 1459, + 1471, + 1481, + 1483, + 1487, + 1489, + 1493, + 1499, + 1511, + 1523, + 1531, + 1543, + 1549, + 1553, + 1559, + 1567, + 1571, + 1579, + 1583, + 1597, + 1601, + 1607, + 1609, + 1613, + 1619, + 1621, + 1627, + 1637, + 1657, + 1663, + 1667, + 1669, + 1693, + 1697, + 1699, + 1709, + 1721, + 1723, + 1733, + 1741, + 1747, + 1753, + 1759, + 1777, + 1783, + 1787, + 1789, + 1801, + 1811, + 1823, + 1831, + 1847, + 1861, + 1867, + 1871, + 1873, + 1877, + 1879, + 1889, + 1901, + 1907, + 1913, + 1931, + 1933, + 1949, + 1951, + 1973, + 1979, + 1987, + 1993, + 1997, + 1999, + 2003, + 2011, + 2017, + 2027, + 2029, + 2039, + 2053, + 2063, + 2069, + 2081, + 2083, + 2087, + 2089, + 2099, + 2111, + 2113, + 2129, + 2131, + 2137, + 2141, + 2143, + 2153, + 2161, + 2179, + 2203, + 2207, + 2213, + 2221, + 2237, + 2239, + 2243, + 2251, + 2267, + 2269, + 2273, + 2281, + 2287, + 2293, + 2297, + 2309, + 2311, + 2333, + 2339, + 2341, + 2347, + 2351, + 2357, + 2371, + 2377, + 2381, + 2383, + 2389, + 2393, + 2399, + 2411, + 2417, + 2423, + 2437, + 2441, + 2447, + 2459, + 2467, + 2473, + 2477, + 2503, + 2521, + 2531, + 2539, + 2543, + 2549, + 2551, + 2557, + 2579, + 2591, + 2593, + 2609, + 2617, + 2621, + 2633, + 2647, + 2657, + 2659, + 2663, + 2671, + 2677, + 2683, + 2687, + 2689, + 2693, + 2699, + 2707, + 2711, + 2713, + 2719, + 2729, + 2731, + 2741, + 2749, + 2753, + 2767, + 2777, + 2789, + 2791, + 2797, + 2801, + 2803, + 2819, + 2833, + 2837, + 2843, + 2851, + 2857, + 2861, + 2879, + 2887, + 2897, + 2903, + 2909, + 2917, + 2927, + 2939, + 2953, + 2957, + 2963, + 2969, + 2971, + 2999, + 3001, + 3011, + 3019, + 3023, + 3037, + 3041, + 3049, + 3061, + 3067, + 3079, + 3083, + 3089, + 3109, + 3119, + 3121, + 3137, + 3163, + 3167, + 3169, + 3181, + 3187, + 3191, + 3203, + 3209, + 3217, + 3221, + 3229, + 3251, + 3253, + 3257, + 3259, + 3271, + 3299, + 3301, + 3307, + 3313, + 3319, + 3323, + 3329, + 3331, + 3343, + 3347, + 3359, + 3361, + 3371, + 3373, + 3389, + 3391, + 3407, + 3413, + 3433, + 3449, + 3457, + 3461, + 3463, + 3467, + 3469, + 3491, + 3499, + 3511, + 3517, + 3527, + 3529, + 3533, + 3539, + 3541, + 3547, + 3557, + 3559, + 3571, + 3581, + 3583, + 3593, + 3607, + 3613, + 3617, + 3623, + 3631, + 3637, + 3643, + 3659, + 3671, + 3673, + 3677, + 3691, + 3697, + 3701, + 3709, + 3719, + 3727, + 3733, + 3739, + 3761, + 3767, + 3769, + 3779, + 3793, + 3797, + 3803, + 3821, + 3823, + 3833, + 3847, + 3851, + 3853, + 3863, + 3877, + 3881, + 3889, + 3907, + 3911, + 3917, + 3919, + 3923, + 3929, + 3931, + 3943, + 3947, + 3967, + 3989, + 4001, + 4003, + 4007, + 4013, + 4019, + 4021, + 4027, + 4049, + 4051, + 4057, + 4073, + 4079, + 4091, + 4093, + 4099, + 4111, + 4127, + 4129, + 4133, + 4139, + 4153, + 4157, + 4159, + 4177, + 4201, + 4211, + 4217, + 4219, + 4229, + 4231, + 4241, + 4243, + 4253, + 4259, + 4261, + 4271, + 4273, + 4283, + 4289, + 4297, + 4327, + 4337, + 4339, + 4349, + 4357, + 4363, + 4373, + 4391, + 4397, + 4409, + 4421, + 4423, + 4441, + 4447, + 4451, + 4457, + 4463, + 4481, + 4483, + 4493, + 4507, + 4513, + 4517, + 4519, + 4523, + 4547, + 4549, + 4561, + 4567, + 4583, + 4591, + 4597, + 4603, + 4621, + 4637, + 4639, + 4643, + 4649, + 4651, + 4657, + 4663, + 4673, + 4679, + 4691, + 4703, + 4721, + 4723, + 4729, + 4733, + 4751, + 4759, + 4783, + 4787, + 4789, + 4793, + 4799, + 4801, + 4813, + 4817, + 4831, + 4861, + 4871, + 4877, + 4889, + 4903, + 4909, + 4919, + 4931, + 4933, + 4937, + 4943, + 4951, + 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7127, + 7129, + 7151, + 7159, + 7177, + 7187, + 7193, + 7207, + 7211, + 7213, + 7219, + 7229, + 7237, + 7243, + 7247, + 7253, + 7283, + 7297, + 7307, + 7309, + 7321, + 7331, + 7333, + 7349, + 7351, + 7369, + 7393, + 7411, + 7417, + 7433, + 7451, + 7457, + 7459, + 7477, + 7481, + 7487, + 7489, + 7499, + 7507, + 7517, + 7523, + 7529, + 7537, + 7541, + 7547, + 7549, + 7559, + 7561, + 7573, + 7577, + 7583, + 7589, + 7591, + 7603, + 7607, + 7621, + 7639, + 7643, + 7649, + 7669, + 7673, + 7681, + 7687, + 7691, + 7699, + 7703, + 7717, + 7723, + 7727, + 7741, + 7753, + 7757, + 7759, + 7789, + 7793, + 7817, + 7823, + 7829, + 7841, + 7853, + 7867, + 7873, + 7877, + 7879, + 7883, + 7901, + 7907, + 7919, +}; diff --git a/src/libsec/port/smallprimetest.c b/src/libsec/port/smallprimetest.c new file mode 100644 index 00000000..cf94dac2 --- /dev/null +++ b/src/libsec/port/smallprimetest.c @@ -0,0 +1,1039 @@ +#include "os.h" +#include +#include + +static ulong smallprimes[] = { + 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, + 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, + 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, + 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, + 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, + 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, + 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, + 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, + 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, + 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, + 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, + 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, + 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, + 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, + 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, + 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, + 947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013, + 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, + 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, + 1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, + 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, + 1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373, + 1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451, + 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511, + 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, + 1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, + 1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733, + 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, + 1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889, + 1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987, + 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053, + 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, + 2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213, + 2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287, + 2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357, + 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423, + 2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531, + 2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617, + 2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687, + 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741, + 2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819, + 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903, + 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, + 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079, + 3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181, + 3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257, + 3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331, + 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413, + 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, + 3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, + 3581, 3583, 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643, + 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709, 3719, 3727, + 3733, 3739, 3761, 3767, 3769, 3779, 3793, 3797, 3803, 3821, + 3823, 3833, 3847, 3851, 3853, 3863, 3877, 3881, 3889, 3907, + 3911, 3917, 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989, + 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, + 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, + 4153, 4157, 4159, 4177, 4201, 4211, 4217, 4219, 4229, 4231, + 4241, 4243, 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297, + 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397, 4409, + 4421, 4423, 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, + 4507, 4513, 4517, 4519, 4523, 4547, 4549, 4561, 4567, 4583, + 4591, 4597, 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657, + 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729, 4733, 4751, + 4759, 4783, 4787, 4789, 4793, 4799, 4801, 4813, 4817, 4831, + 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, 4933, 4937, + 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999, 5003, + 5009, 5011, 5021, 5023, 5039, 5051, 5059, 5077, 5081, 5087, + 5099, 5101, 5107, 5113, 5119, 5147, 5153, 5167, 5171, 5179, + 5189, 5197, 5209, 5227, 5231, 5233, 5237, 5261, 5273, 5279, + 5281, 5297, 5303, 5309, 5323, 5333, 5347, 5351, 5381, 5387, + 5393, 5399, 5407, 5413, 5417, 5419, 5431, 5437, 5441, 5443, + 5449, 5471, 5477, 5479, 5483, 5501, 5503, 5507, 5519, 5521, + 5527, 5531, 5557, 5563, 5569, 5573, 5581, 5591, 5623, 5639, + 5641, 5647, 5651, 5653, 5657, 5659, 5669, 5683, 5689, 5693, + 5701, 5711, 5717, 5737, 5741, 5743, 5749, 5779, 5783, 5791, + 5801, 5807, 5813, 5821, 5827, 5839, 5843, 5849, 5851, 5857, + 5861, 5867, 5869, 5879, 5881, 5897, 5903, 5923, 5927, 5939, + 5953, 5981, 5987, 6007, 6011, 6029, 6037, 6043, 6047, 6053, + 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, + 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, + 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, + 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, + 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, + 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, + 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, + 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, + 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, + 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, + 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997, + 7001, 7013, 7019, 7027, 7039, 7043, 7057, 7069, 7079, 7103, + 7109, 7121, 7127, 7129, 7151, 7159, 7177, 7187, 7193, 7207, + 7211, 7213, 7219, 7229, 7237, 7243, 7247, 7253, 7283, 7297, + 7307, 7309, 7321, 7331, 7333, 7349, 7351, 7369, 7393, 7411, + 7417, 7433, 7451, 7457, 7459, 7477, 7481, 7487, 7489, 7499, + 7507, 7517, 7523, 7529, 7537, 7541, 7547, 7549, 7559, 7561, + 7573, 7577, 7583, 7589, 7591, 7603, 7607, 7621, 7639, 7643, + 7649, 7669, 7673, 7681, 7687, 7691, 7699, 7703, 7717, 7723, + 7727, 7741, 7753, 7757, 7759, 7789, 7793, 7817, 7823, 7829, + 7841, 7853, 7867, 7873, 7877, 7879, 7883, 7901, 7907, 7919, + 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009, 8011, 8017, + 8039, 8053, 8059, 8069, 8081, 8087, 8089, 8093, 8101, 8111, + 8117, 8123, 8147, 8161, 8167, 8171, 8179, 8191, 8209, 8219, + 8221, 8231, 8233, 8237, 8243, 8263, 8269, 8273, 8287, 8291, + 8293, 8297, 8311, 8317, 8329, 8353, 8363, 8369, 8377, 8387, + 8389, 8419, 8423, 8429, 8431, 8443, 8447, 8461, 8467, 8501, + 8513, 8521, 8527, 8537, 8539, 8543, 8563, 8573, 8581, 8597, + 8599, 8609, 8623, 8627, 8629, 8641, 8647, 8663, 8669, 8677, + 8681, 8689, 8693, 8699, 8707, 8713, 8719, 8731, 8737, 8741, + 8747, 8753, 8761, 8779, 8783, 8803, 8807, 8819, 8821, 8831, + 8837, 8839, 8849, 8861, 8863, 8867, 8887, 8893, 8923, 8929, + 8933, 8941, 8951, 8963, 8969, 8971, 8999, 9001, 9007, 9011, + 9013, 9029, 9041, 9043, 9049, 9059, 9067, 9091, 9103, 9109, + 9127, 9133, 9137, 9151, 9157, 9161, 9173, 9181, 9187, 9199, + 9203, 9209, 9221, 9227, 9239, 9241, 9257, 9277, 9281, 9283, + 9293, 9311, 9319, 9323, 9337, 9341, 9343, 9349, 9371, 9377, + 9391, 9397, 9403, 9413, 9419, 9421, 9431, 9433, 9437, 9439, + 9461, 9463, 9467, 9473, 9479, 9491, 9497, 9511, 9521, 9533, + 9539, 9547, 9551, 9587, 9601, 9613, 9619, 9623, 9629, 9631, + 9643, 9649, 9661, 9677, 9679, 9689, 9697, 9719, 9721, 9733, + 9739, 9743, 9749, 9767, 9769, 9781, 9787, 9791, 9803, 9811, + 9817, 9829, 9833, 9839, 9851, 9857, 9859, 9871, 9883, 9887, + 9901, 9907, 9923, 9929, 9931, 9941, 9949, 9967, 9973, 10007, + 10009, 10037, 10039, 10061, 10067, 10069, 10079, 10091, 10093, 10099, + 10103, 10111, 10133, 10139, 10141, 10151, 10159, 10163, 10169, 10177, + 10181, 10193, 10211, 10223, 10243, 10247, 10253, 10259, 10267, 10271, + 10273, 10289, 10301, 10303, 10313, 10321, 10331, 10333, 10337, 10343, + 10357, 10369, 10391, 10399, 10427, 10429, 10433, 10453, 10457, 10459, + 10463, 10477, 10487, 10499, 10501, 10513, 10529, 10531, 10559, 10567, + 10589, 10597, 10601, 10607, 10613, 10627, 10631, 10639, 10651, 10657, + 10663, 10667, 10687, 10691, 10709, 10711, 10723, 10729, 10733, 10739, + 10753, 10771, 10781, 10789, 10799, 10831, 10837, 10847, 10853, 10859, + 10861, 10867, 10883, 10889, 10891, 10903, 10909, 10937, 10939, 10949, + 10957, 10973, 10979, 10987, 10993, 11003, 11027, 11047, 11057, 11059, + 11069, 11071, 11083, 11087, 11093, 11113, 11117, 11119, 11131, 11149, + 11159, 11161, 11171, 11173, 11177, 11197, 11213, 11239, 11243, 11251, + 11257, 11261, 11273, 11279, 11287, 11299, 11311, 11317, 11321, 11329, + 11351, 11353, 11369, 11383, 11393, 11399, 11411, 11423, 11437, 11443, + 11447, 11467, 11471, 11483, 11489, 11491, 11497, 11503, 11519, 11527, + 11549, 11551, 11579, 11587, 11593, 11597, 11617, 11621, 11633, 11657, + 11677, 11681, 11689, 11699, 11701, 11717, 11719, 11731, 11743, 11777, + 11779, 11783, 11789, 11801, 11807, 11813, 11821, 11827, 11831, 11833, + 11839, 11863, 11867, 11887, 11897, 11903, 11909, 11923, 11927, 11933, + 11939, 11941, 11953, 11959, 11969, 11971, 11981, 11987, 12007, 12011, + 12037, 12041, 12043, 12049, 12071, 12073, 12097, 12101, 12107, 12109, + 12113, 12119, 12143, 12149, 12157, 12161, 12163, 12197, 12203, 12211, + 12227, 12239, 12241, 12251, 12253, 12263, 12269, 12277, 12281, 12289, + 12301, 12323, 12329, 12343, 12347, 12373, 12377, 12379, 12391, 12401, + 12409, 12413, 12421, 12433, 12437, 12451, 12457, 12473, 12479, 12487, + 12491, 12497, 12503, 12511, 12517, 12527, 12539, 12541, 12547, 12553, + 12569, 12577, 12583, 12589, 12601, 12611, 12613, 12619, 12637, 12641, + 12647, 12653, 12659, 12671, 12689, 12697, 12703, 12713, 12721, 12739, + 12743, 12757, 12763, 12781, 12791, 12799, 12809, 12821, 12823, 12829, + 12841, 12853, 12889, 12893, 12899, 12907, 12911, 12917, 12919, 12923, + 12941, 12953, 12959, 12967, 12973, 12979, 12983, 13001, 13003, 13007, + 13009, 13033, 13037, 13043, 13049, 13063, 13093, 13099, 13103, 13109, + 13121, 13127, 13147, 13151, 13159, 13163, 13171, 13177, 13183, 13187, + 13217, 13219, 13229, 13241, 13249, 13259, 13267, 13291, 13297, 13309, + 13313, 13327, 13331, 13337, 13339, 13367, 13381, 13397, 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99083, 99089, 99103, 99109, 99119, 99131, 99133, 99137, 99139, + 99149, 99173, 99181, 99191, 99223, 99233, 99241, 99251, 99257, 99259, + 99277, 99289, 99317, 99347, 99349, 99367, 99371, 99377, 99391, 99397, + 99401, 99409, 99431, 99439, 99469, 99487, 99497, 99523, 99527, 99529, + 99551, 99559, 99563, 99571, 99577, 99581, 99607, 99611, 99623, 99643, + 99661, 99667, 99679, 99689, 99707, 99709, 99713, 99719, 99721, 99733, + 99761, 99767, 99787, 99793, 99809, 99817, 99823, 99829, 99833, 99839, + 99859, 99871, 99877, 99881, 99901, 99907, 99923, 99929, 99961, 99971, + 99989, 99991, 100003, 100019, 100043, 100049, 100057, 100069, 100103, 100109, + 100129, 100151, 100153, 100169, 100183, 100189, 100193, 100207, 100213, 100237, + 100267, 100271, 100279, 100291, 100297, 100313, 100333, 100343, 100357, 100361, + 100363, 100379, 100391, 100393, 100403, 100411, 100417, 100447, 100459, 100469, + 100483, 100493, 100501, 100511, 100517, 100519, 100523, 100537, 100547, 100549, + 100559, 100591, 100609, 100613, 100621, 100649, 100669, 100673, 100693, 100699, + 100703, 100733, 100741, 100747, 100769, 100787, 100799, 100801, 100811, 100823, + 100829, 100847, 100853, 100907, 100913, 100927, 100931, 100937, 100943, 100957, + 100981, 100987, 100999, 101009, 101021, 101027, 101051, 101063, 101081, 101089, + 101107, 101111, 101113, 101117, 101119, 101141, 101149, 101159, 101161, 101173, + 101183, 101197, 101203, 101207, 101209, 101221, 101267, 101273, 101279, 101281, + 101287, 101293, 101323, 101333, 101341, 101347, 101359, 101363, 101377, 101383, + 101399, 101411, 101419, 101429, 101449, 101467, 101477, 101483, 101489, 101501, + 101503, 101513, 101527, 101531, 101533, 101537, 101561, 101573, 101581, 101599, + 101603, 101611, 101627, 101641, 101653, 101663, 101681, 101693, 101701, 101719, + 101723, 101737, 101741, 101747, 101749, 101771, 101789, 101797, 101807, 101833, + 101837, 101839, 101863, 101869, 101873, 101879, 101891, 101917, 101921, 101929, + 101939, 101957, 101963, 101977, 101987, 101999, 102001, 102013, 102019, 102023, + 102031, 102043, 102059, 102061, 102071, 102077, 102079, 102101, 102103, 102107, + 102121, 102139, 102149, 102161, 102181, 102191, 102197, 102199, 102203, 102217, + 102229, 102233, 102241, 102251, 102253, 102259, 102293, 102299, 102301, 102317, + 102329, 102337, 102359, 102367, 102397, 102407, 102409, 102433, 102437, 102451, + 102461, 102481, 102497, 102499, 102503, 102523, 102533, 102539, 102547, 102551, + 102559, 102563, 102587, 102593, 102607, 102611, 102643, 102647, 102653, 102667, + 102673, 102677, 102679, 102701, 102761, 102763, 102769, 102793, 102797, 102811, + 102829, 102841, 102859, 102871, 102877, 102881, 102911, 102913, 102929, 102931, + 102953, 102967, 102983, 103001, 103007, 103043, 103049, 103067, 103069, 103079, + 103087, 103091, 103093, 103099, 103123, 103141, 103171, 103177, 103183, 103217, + 103231, 103237, 103289, 103291, 103307, 103319, 103333, 103349, 103357, 103387, + 103391, 103393, 103399, 103409, 103421, 103423, 103451, 103457, 103471, 103483, + 103511, 103529, 103549, 103553, 103561, 103567, 103573, 103577, 103583, 103591, + 103613, 103619, 103643, 103651, 103657, 103669, 103681, 103687, 103699, 103703, + 103723, 103769, 103787, 103801, 103811, 103813, 103837, 103841, 103843, 103867, + 103889, 103903, 103913, 103919, 103951, 103963, 103967, 103969, 103979, 103981, + 103991, 103993, 103997, 104003, 104009, 104021, 104033, 104047, 104053, 104059, + 104087, 104089, 104107, 104113, 104119, 104123, 104147, 104149, 104161, 104173, + 104179, 104183, 104207, 104231, 104233, 104239, 104243, 104281, 104287, 104297, + 104309, 104311, 104323, 104327, 104347, 104369, 104381, 104383, 104393, 104399, + 104417, 104459, 104471, 104473, 104479, 104491, 104513, 104527, 104537, 104543, + 104549, 104551, 104561, 104579, 104593, 104597, 104623, 104639, 104651, 104659, + 104677, 104681, 104683, 104693, 104701, 104707, 104711, 104717, 104723, 104729, +}; + +// return 1 if p is divisable by sp, 0 otherwise +static int +divides(mpint *dividend, ulong divisor) +{ + mpdigit d[2], q; + int i; + + d[1] = 0; + for(i = dividend->top-1; i >= 0; i--){ + d[0] = dividend->p[i]; + mpdigdiv(d, divisor, &q); + d[1] = d[0] - divisor*q; + } + return d[1] == 0; +} + +// return -1 if p is divisable by one of the small primes, 0 otherwise +int +smallprimetest(mpint *p) +{ + int i; + ulong sp; + + for(i = 0; i < nelem(smallprimes); i++){ + sp = smallprimes[i]; + if(p->top == 1 && p->p[0] <= sp) + break; + if(divides(p, sp)) + return -1; + } + return 0; +} diff --git a/src/libsec/port/thumb.c b/src/libsec/port/thumb.c new file mode 100644 index 00000000..cac95a43 --- /dev/null +++ b/src/libsec/port/thumb.c @@ -0,0 +1,97 @@ +#include +#include +#include +#include +#include +#include + +enum{ ThumbTab = 1<<10 }; + +static void * +emalloc(int n) +{ + void *p; + if(n==0) + n=1; + p = malloc(n); + if(p == nil){ + exits("out of memory"); + } + memset(p, 0, n); + return p; +} + +void +freeThumbprints(Thumbprint *table) +{ + Thumbprint *hd, *p, *q; + for(hd = table; hd < table+ThumbTab; hd++){ + for(p = hd->next; p; p = q){ + q = p->next; + free(p); + } + } + free(table); +} + +int +okThumbprint(uchar *sum, Thumbprint *table) +{ + Thumbprint *p; + int i = ((sum[0]<<8) + sum[1]) & (ThumbTab-1); + + for(p = table[i].next; p; p = p->next) + if(memcmp(sum, p->sha1, SHA1dlen) == 0) + return 1; + return 0; +} + +static void +loadThumbprints(char *file, Thumbprint *table, Thumbprint *crltab) +{ + Thumbprint *entry; + Biobuf *bin; + char *line, *field[50]; + uchar sum[SHA1dlen]; + int i; + + bin = Bopen(file, OREAD); + if(bin == nil) + return; + for(; (line = Brdstr(bin, '\n', 1)) != 0; free(line)){ + if(tokenize(line, field, nelem(field)) < 2) + continue; + if(strcmp(field[0], "#include") == 0){ + loadThumbprints(field[1], table, crltab); + continue; + } + if(strcmp(field[0], "x509") != 0 || strncmp(field[1], "sha1=", strlen("sha1=")) != 0) + continue; + field[1] += strlen("sha1="); + dec16(sum, sizeof(sum), field[1], strlen(field[1])); + if(crltab && okThumbprint(sum, crltab)) + continue; + entry = (Thumbprint*)emalloc(sizeof(*entry)); + memcpy(entry->sha1, sum, SHA1dlen); + i = ((sum[0]<<8) + sum[1]) & (ThumbTab-1); + entry->next = table[i].next; + table[i].next = entry; + } + Bterm(bin); +} + +Thumbprint * +initThumbprints(char *ok, char *crl) +{ + Thumbprint *table, *crltab = nil; + + if(crl){ + crltab = emalloc(ThumbTab * sizeof(*table)); + loadThumbprints(crl, crltab, nil); + } + table = emalloc(ThumbTab * sizeof(*table)); + loadThumbprints(ok, table, crltab); + free(crltab); + return table; +} + diff --git a/src/libsec/port/tlshand.c b/src/libsec/port/tlshand.c new file mode 100644 index 00000000..68c98084 --- /dev/null +++ b/src/libsec/port/tlshand.c @@ -0,0 +1,2291 @@ +#include +#include +#include +#include +#include +#include + +// The main groups of functions are: +// client/server - main handshake protocol definition +// message functions - formating handshake messages +// cipher choices - catalog of digest and encrypt algorithms +// security functions - PKCS#1, sslHMAC, session keygen +// general utility functions - malloc, serialization +// The handshake protocol builds on the TLS/SSL3 record layer protocol, +// which is implemented in kernel device #a. See also /lib/rfc/rfc2246. + +enum { + TLSFinishedLen = 12, + SSL3FinishedLen = MD5dlen+SHA1dlen, + MaxKeyData = 104, // amount of secret we may need + MaxChunk = 1<<14, + RandomSize = 32, + SidSize = 32, + MasterSecretSize = 48, + AQueue = 0, + AFlush = 1, +}; + +typedef struct TlsSec TlsSec; + +typedef struct Bytes{ + int len; + uchar data[1]; // [len] +} Bytes; + +typedef struct Ints{ + int len; + int data[1]; // [len] +} Ints; + +typedef struct Algs{ + char *enc; + char *digest; + int nsecret; + int tlsid; + int ok; +} Algs; + +typedef struct Finished{ + uchar verify[SSL3FinishedLen]; + int n; +} Finished; + +typedef struct TlsConnection{ + TlsSec *sec; // security management goo + int hand, ctl; // record layer file descriptors + int erred; // set when tlsError called + int (*trace)(char*fmt, ...); // for debugging + int version; // protocol we are speaking + int verset; // version has been set + int ver2hi; // server got a version 2 hello + int isClient; // is this the client or server? + Bytes *sid; // SessionID + Bytes *cert; // only last - no chain + + Lock statelk; + int state; // must be set using setstate + + // input buffer for handshake messages + uchar buf[MaxChunk+2048]; + uchar *rp, *ep; + + uchar crandom[RandomSize]; // client random + uchar srandom[RandomSize]; // server random + int clientVersion; // version in ClientHello + char *digest; // name of digest algorithm to use + char *enc; // name of encryption algorithm to use + int nsecret; // amount of secret data to init keys + + // for finished messages + MD5state hsmd5; // handshake hash + SHAstate hssha1; // handshake hash + Finished finished; +} TlsConnection; + +typedef struct Msg{ + int tag; + union { + struct { + int version; + uchar random[RandomSize]; + Bytes* sid; + Ints* ciphers; + Bytes* compressors; + } clientHello; + struct { + int version; + uchar random[RandomSize]; + Bytes* sid; + int cipher; + int compressor; + } serverHello; + struct { + int ncert; + Bytes **certs; + } certificate; + struct { + Bytes *types; + int nca; + Bytes **cas; + } certificateRequest; + struct { + Bytes *key; + } clientKeyExchange; + Finished finished; + } u; +} Msg; + +struct TlsSec{ + char *server; // name of remote; nil for server + int ok; // <0 killed; ==0 in progress; >0 reusable + RSApub *rsapub; + AuthRpc *rpc; // factotum for rsa private key + uchar sec[MasterSecretSize]; // master secret + uchar crandom[RandomSize]; // client random + uchar srandom[RandomSize]; // server random + int clientVers; // version in ClientHello + int vers; // final version + // byte generation and handshake checksum + void (*prf)(uchar*, int, uchar*, int, char*, uchar*, int, uchar*, int); + void (*setFinished)(TlsSec*, MD5state, SHAstate, uchar*, int); + int nfin; +}; + + +enum { + TLSVersion = 0x0301, + SSL3Version = 0x0300, + ProtocolVersion = 0x0301, // maximum version we speak + MinProtoVersion = 0x0300, // limits on version we accept + MaxProtoVersion = 0x03ff, +}; + +// handshake type +enum { + HHelloRequest, + HClientHello, + HServerHello, + HSSL2ClientHello = 9, /* local convention; see devtls.c */ + HCertificate = 11, + HServerKeyExchange, + HCertificateRequest, + HServerHelloDone, + HCertificateVerify, + HClientKeyExchange, + HFinished = 20, + HMax +}; + +// alerts +enum { + ECloseNotify = 0, + EUnexpectedMessage = 10, + EBadRecordMac = 20, + EDecryptionFailed = 21, + ERecordOverflow = 22, + EDecompressionFailure = 30, + EHandshakeFailure = 40, + ENoCertificate = 41, + EBadCertificate = 42, + EUnsupportedCertificate = 43, + ECertificateRevoked = 44, + ECertificateExpired = 45, + ECertificateUnknown = 46, + EIllegalParameter = 47, + EUnknownCa = 48, + EAccessDenied = 49, + EDecodeError = 50, + EDecryptError = 51, + EExportRestriction = 60, + EProtocolVersion = 70, + EInsufficientSecurity = 71, + EInternalError = 80, + EUserCanceled = 90, + ENoRenegotiation = 100, + EMax = 256 +}; + +// cipher suites +enum { + TLS_NULL_WITH_NULL_NULL = 0x0000, + TLS_RSA_WITH_NULL_MD5 = 0x0001, + TLS_RSA_WITH_NULL_SHA = 0x0002, + TLS_RSA_EXPORT_WITH_RC4_40_MD5 = 0x0003, + TLS_RSA_WITH_RC4_128_MD5 = 0x0004, + TLS_RSA_WITH_RC4_128_SHA = 0x0005, + TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 = 0X0006, + TLS_RSA_WITH_IDEA_CBC_SHA = 0X0007, + TLS_RSA_EXPORT_WITH_DES40_CBC_SHA = 0X0008, + TLS_RSA_WITH_DES_CBC_SHA = 0X0009, + TLS_RSA_WITH_3DES_EDE_CBC_SHA = 0X000A, + TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA = 0X000B, + TLS_DH_DSS_WITH_DES_CBC_SHA = 0X000C, + TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA = 0X000D, + TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA = 0X000E, + TLS_DH_RSA_WITH_DES_CBC_SHA = 0X000F, + TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA = 0X0010, + TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA = 0X0011, + TLS_DHE_DSS_WITH_DES_CBC_SHA = 0X0012, + TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA = 0X0013, // ZZZ must be implemented for tls1.0 compliance + TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA = 0X0014, + TLS_DHE_RSA_WITH_DES_CBC_SHA = 0X0015, + TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA = 0X0016, + TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 = 0x0017, + TLS_DH_anon_WITH_RC4_128_MD5 = 0x0018, + TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA = 0X0019, + TLS_DH_anon_WITH_DES_CBC_SHA = 0X001A, + TLS_DH_anon_WITH_3DES_EDE_CBC_SHA = 0X001B, + + TLS_RSA_WITH_AES_128_CBC_SHA = 0X002f, // aes, aka rijndael with 128 bit blocks + TLS_DH_DSS_WITH_AES_128_CBC_SHA = 0X0030, + TLS_DH_RSA_WITH_AES_128_CBC_SHA = 0X0031, + TLS_DHE_DSS_WITH_AES_128_CBC_SHA = 0X0032, + TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0X0033, + TLS_DH_anon_WITH_AES_128_CBC_SHA = 0X0034, + TLS_RSA_WITH_AES_256_CBC_SHA = 0X0035, + TLS_DH_DSS_WITH_AES_256_CBC_SHA = 0X0036, + TLS_DH_RSA_WITH_AES_256_CBC_SHA = 0X0037, + TLS_DHE_DSS_WITH_AES_256_CBC_SHA = 0X0038, + TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0X0039, + TLS_DH_anon_WITH_AES_256_CBC_SHA = 0X003A, + CipherMax +}; + +// compression methods +enum { + CompressionNull = 0, + CompressionMax +}; + +static Algs cipherAlgs[] = { + {"rc4_128", "md5", 2 * (16 + MD5dlen), TLS_RSA_WITH_RC4_128_MD5}, + {"rc4_128", "sha1", 2 * (16 + SHA1dlen), TLS_RSA_WITH_RC4_128_SHA}, + {"3des_ede_cbc","sha1",2*(4*8+SHA1dlen), TLS_RSA_WITH_3DES_EDE_CBC_SHA}, +}; + +static uchar compressors[] = { + CompressionNull, +}; + +static TlsConnection *tlsServer2(int ctl, int hand, uchar *cert, int ncert, int (*trace)(char*fmt, ...)); +static TlsConnection *tlsClient2(int ctl, int hand, uchar *csid, int ncsid, int (*trace)(char*fmt, ...)); + +static void msgClear(Msg *m); +static char* msgPrint(char *buf, int n, Msg *m); +static int msgRecv(TlsConnection *c, Msg *m); +static int msgSend(TlsConnection *c, Msg *m, int act); +static void tlsError(TlsConnection *c, int err, char *msg, ...); +/* #pragma varargck argpos tlsError 3*/ +static int setVersion(TlsConnection *c, int version); +static int finishedMatch(TlsConnection *c, Finished *f); +static void tlsConnectionFree(TlsConnection *c); + +static int setAlgs(TlsConnection *c, int a); +static int okCipher(Ints *cv); +static int okCompression(Bytes *cv); +static int initCiphers(void); +static Ints* makeciphers(void); + +static TlsSec* tlsSecInits(int cvers, uchar *csid, int ncsid, uchar *crandom, uchar *ssid, int *nssid, uchar *srandom); +static int tlsSecSecrets(TlsSec *sec, int vers, uchar *epm, int nepm, uchar *kd, int nkd); +static TlsSec* tlsSecInitc(int cvers, uchar *crandom); +static int tlsSecSecretc(TlsSec *sec, uchar *sid, int nsid, uchar *srandom, uchar *cert, int ncert, int vers, uchar **epm, int *nepm, uchar *kd, int nkd); +static int tlsSecFinished(TlsSec *sec, MD5state md5, SHAstate sha1, uchar *fin, int nfin, int isclient); +static void tlsSecOk(TlsSec *sec); +static void tlsSecKill(TlsSec *sec); +static void tlsSecClose(TlsSec *sec); +static void setMasterSecret(TlsSec *sec, Bytes *pm); +static void serverMasterSecret(TlsSec *sec, uchar *epm, int nepm); +static void setSecrets(TlsSec *sec, uchar *kd, int nkd); +static int clientMasterSecret(TlsSec *sec, RSApub *pub, uchar **epm, int *nepm); +static Bytes *pkcs1_encrypt(Bytes* data, RSApub* key, int blocktype); +static Bytes *pkcs1_decrypt(TlsSec *sec, uchar *epm, int nepm); +static void tlsSetFinished(TlsSec *sec, MD5state hsmd5, SHAstate hssha1, uchar *finished, int isClient); +static void sslSetFinished(TlsSec *sec, MD5state hsmd5, SHAstate hssha1, uchar *finished, int isClient); +static void sslPRF(uchar *buf, int nbuf, uchar *key, int nkey, char *label, + uchar *seed0, int nseed0, uchar *seed1, int nseed1); +static int setVers(TlsSec *sec, int version); + +static AuthRpc* factotum_rsa_open(uchar *cert, int certlen); +static mpint* factotum_rsa_decrypt(AuthRpc *rpc, mpint *cipher); +static void factotum_rsa_close(AuthRpc*rpc); + +static void* emalloc(int); +static void* erealloc(void*, int); +static void put32(uchar *p, u32int); +static void put24(uchar *p, int); +static void put16(uchar *p, int); +static u32int get32(uchar *p); +static int get24(uchar *p); +static int get16(uchar *p); +static Bytes* newbytes(int len); +static Bytes* makebytes(uchar* buf, int len); +static void freebytes(Bytes* b); +static Ints* newints(int len); +static Ints* makeints(int* buf, int len); +static void freeints(Ints* b); + +//================= client/server ======================== + +// push TLS onto fd, returning new (application) file descriptor +// or -1 if error. +int +tlsServer(int fd, TLSconn *conn) +{ + char buf[8]; + char dname[64]; + int n, data, ctl, hand; + TlsConnection *tls; + + if(conn == nil) + return -1; + ctl = open("#a/tls/clone", ORDWR); + if(ctl < 0) + return -1; + n = read(ctl, buf, sizeof(buf)-1); + if(n < 0){ + close(ctl); + return -1; + } + buf[n] = 0; + sprint(conn->dir, "#a/tls/%s", buf); + sprint(dname, "#a/tls/%s/hand", buf); + hand = open(dname, ORDWR); + if(hand < 0){ + close(ctl); + return -1; + } + fprint(ctl, "fd %d 0x%x", fd, ProtocolVersion); + tls = tlsServer2(ctl, hand, conn->cert, conn->certlen, conn->trace); + sprint(dname, "#a/tls/%s/data", buf); + data = open(dname, ORDWR); + close(fd); + close(hand); + close(ctl); + if(data < 0){ + return -1; + } + if(tls == nil){ + close(data); + return -1; + } + if(conn->cert) + free(conn->cert); + conn->cert = 0; // client certificates are not yet implemented + conn->certlen = 0; + conn->sessionIDlen = tls->sid->len; + conn->sessionID = emalloc(conn->sessionIDlen); + memcpy(conn->sessionID, tls->sid->data, conn->sessionIDlen); + tlsConnectionFree(tls); + return data; +} + +// push TLS onto fd, returning new (application) file descriptor +// or -1 if error. +int +tlsClient(int fd, TLSconn *conn) +{ + char buf[8]; + char dname[64]; + int n, data, ctl, hand; + TlsConnection *tls; + + if(!conn) + return -1; + ctl = open("#a/tls/clone", ORDWR); + if(ctl < 0) + return -1; + n = read(ctl, buf, sizeof(buf)-1); + if(n < 0){ + close(ctl); + return -1; + } + buf[n] = 0; + sprint(conn->dir, "#a/tls/%s", buf); + sprint(dname, "#a/tls/%s/hand", buf); + hand = open(dname, ORDWR); + if(hand < 0){ + close(ctl); + return -1; + } + sprint(dname, "#a/tls/%s/data", buf); + data = open(dname, ORDWR); + if(data < 0) + return -1; + fprint(ctl, "fd %d 0x%x", fd, ProtocolVersion); + tls = tlsClient2(ctl, hand, conn->sessionID, conn->sessionIDlen, conn->trace); + close(fd); + close(hand); + close(ctl); + if(tls == nil){ + close(data); + return -1; + } + conn->certlen = tls->cert->len; + conn->cert = emalloc(conn->certlen); + memcpy(conn->cert, tls->cert->data, conn->certlen); + conn->sessionIDlen = tls->sid->len; + conn->sessionID = emalloc(conn->sessionIDlen); + memcpy(conn->sessionID, tls->sid->data, conn->sessionIDlen); + tlsConnectionFree(tls); + return data; +} + +static TlsConnection * +tlsServer2(int ctl, int hand, uchar *cert, int ncert, int (*trace)(char*fmt, ...)) +{ + TlsConnection *c; + Msg m; + Bytes *csid; + uchar sid[SidSize], kd[MaxKeyData]; + char *secrets; + int cipher, compressor, nsid, rv; + + if(trace) + trace("tlsServer2\n"); + if(!initCiphers()) + return nil; + c = emalloc(sizeof(TlsConnection)); + c->ctl = ctl; + c->hand = hand; + c->trace = trace; + c->version = ProtocolVersion; + + memset(&m, 0, sizeof(m)); + if(!msgRecv(c, &m)){ + if(trace) + trace("initial msgRecv failed\n"); + goto Err; + } + if(m.tag != HClientHello) { + tlsError(c, EUnexpectedMessage, "expected a client hello"); + goto Err; + } + c->clientVersion = m.u.clientHello.version; + if(trace) + trace("ClientHello version %x\n", c->clientVersion); + if(setVersion(c, m.u.clientHello.version) < 0) { + tlsError(c, EIllegalParameter, "incompatible version"); + goto Err; + } + + memmove(c->crandom, m.u.clientHello.random, RandomSize); + cipher = okCipher(m.u.clientHello.ciphers); + if(cipher < 0) { + // reply with EInsufficientSecurity if we know that's the case + if(cipher == -2) + tlsError(c, EInsufficientSecurity, "cipher suites too weak"); + else + tlsError(c, EHandshakeFailure, "no matching cipher suite"); + goto Err; + } + if(!setAlgs(c, cipher)){ + tlsError(c, EHandshakeFailure, "no matching cipher suite"); + goto Err; + } + compressor = okCompression(m.u.clientHello.compressors); + if(compressor < 0) { + tlsError(c, EHandshakeFailure, "no matching compressor"); + goto Err; + } + + csid = m.u.clientHello.sid; + if(trace) + trace(" cipher %d, compressor %d, csidlen %d\n", cipher, compressor, csid->len); + c->sec = tlsSecInits(c->clientVersion, csid->data, csid->len, c->crandom, sid, &nsid, c->srandom); + if(c->sec == nil){ + tlsError(c, EHandshakeFailure, "can't initialize security: %r"); + goto Err; + } + c->sec->rpc = factotum_rsa_open(cert, ncert); + if(c->sec->rpc == nil){ + tlsError(c, EHandshakeFailure, "factotum_rsa_open: %r"); + goto Err; + } + c->sec->rsapub = X509toRSApub(cert, ncert, nil, 0); + msgClear(&m); + + m.tag = HServerHello; + m.u.serverHello.version = c->version; + memmove(m.u.serverHello.random, c->srandom, RandomSize); + m.u.serverHello.cipher = cipher; + m.u.serverHello.compressor = compressor; + c->sid = makebytes(sid, nsid); + m.u.serverHello.sid = makebytes(c->sid->data, c->sid->len); + if(!msgSend(c, &m, AQueue)) + goto Err; + msgClear(&m); + + m.tag = HCertificate; + m.u.certificate.ncert = 1; + m.u.certificate.certs = emalloc(m.u.certificate.ncert * sizeof(Bytes)); + m.u.certificate.certs[0] = makebytes(cert, ncert); + if(!msgSend(c, &m, AQueue)) + goto Err; + msgClear(&m); + + m.tag = HServerHelloDone; + if(!msgSend(c, &m, AFlush)) + goto Err; + msgClear(&m); + + if(!msgRecv(c, &m)) + goto Err; + if(m.tag != HClientKeyExchange) { + tlsError(c, EUnexpectedMessage, "expected a client key exchange"); + goto Err; + } + if(tlsSecSecrets(c->sec, c->version, m.u.clientKeyExchange.key->data, m.u.clientKeyExchange.key->len, kd, c->nsecret) < 0){ + tlsError(c, EHandshakeFailure, "couldn't set secrets: %r"); + goto Err; + } + if(trace) + trace("tls secrets\n"); + secrets = (char*)emalloc(2*c->nsecret); + enc64(secrets, 2*c->nsecret, kd, c->nsecret); + rv = fprint(c->ctl, "secret %s %s 0 %s", c->digest, c->enc, secrets); + memset(secrets, 0, 2*c->nsecret); + free(secrets); + memset(kd, 0, c->nsecret); + if(rv < 0){ + tlsError(c, EHandshakeFailure, "can't set keys: %r"); + goto Err; + } + msgClear(&m); + + /* no CertificateVerify; skip to Finished */ + if(tlsSecFinished(c->sec, c->hsmd5, c->hssha1, c->finished.verify, c->finished.n, 1) < 0){ + tlsError(c, EInternalError, "can't set finished: %r"); + goto Err; + } + if(!msgRecv(c, &m)) + goto Err; + if(m.tag != HFinished) { + tlsError(c, EUnexpectedMessage, "expected a finished"); + goto Err; + } + if(!finishedMatch(c, &m.u.finished)) { + tlsError(c, EHandshakeFailure, "finished verification failed"); + goto Err; + } + msgClear(&m); + + /* change cipher spec */ + if(fprint(c->ctl, "changecipher") < 0){ + tlsError(c, EInternalError, "can't enable cipher: %r"); + goto Err; + } + + if(tlsSecFinished(c->sec, c->hsmd5, c->hssha1, c->finished.verify, c->finished.n, 0) < 0){ + tlsError(c, EInternalError, "can't set finished: %r"); + goto Err; + } + m.tag = HFinished; + m.u.finished = c->finished; + if(!msgSend(c, &m, AFlush)) + goto Err; + msgClear(&m); + if(trace) + trace("tls finished\n"); + + if(fprint(c->ctl, "opened") < 0) + goto Err; + tlsSecOk(c->sec); + return c; + +Err: + msgClear(&m); + tlsConnectionFree(c); + return 0; +} + +static TlsConnection * +tlsClient2(int ctl, int hand, uchar *csid, int ncsid, int (*trace)(char*fmt, ...)) +{ + TlsConnection *c; + Msg m; + uchar kd[MaxKeyData], *epm; + char *secrets; + int creq, nepm, rv; + + if(!initCiphers()) + return nil; + epm = nil; + c = emalloc(sizeof(TlsConnection)); + c->version = ProtocolVersion; + c->ctl = ctl; + c->hand = hand; + c->trace = trace; + c->isClient = 1; + c->clientVersion = c->version; + + c->sec = tlsSecInitc(c->clientVersion, c->crandom); + if(c->sec == nil) + goto Err; + + /* client hello */ + memset(&m, 0, sizeof(m)); + m.tag = HClientHello; + m.u.clientHello.version = c->clientVersion; + memmove(m.u.clientHello.random, c->crandom, RandomSize); + m.u.clientHello.sid = makebytes(csid, ncsid); + m.u.clientHello.ciphers = makeciphers(); + m.u.clientHello.compressors = makebytes(compressors,sizeof(compressors)); + if(!msgSend(c, &m, AFlush)) + goto Err; + msgClear(&m); + + /* server hello */ + if(!msgRecv(c, &m)) + goto Err; + if(m.tag != HServerHello) { + tlsError(c, EUnexpectedMessage, "expected a server hello"); + goto Err; + } + if(setVersion(c, m.u.serverHello.version) < 0) { + tlsError(c, EIllegalParameter, "incompatible version %r"); + goto Err; + } + memmove(c->srandom, m.u.serverHello.random, RandomSize); + c->sid = makebytes(m.u.serverHello.sid->data, m.u.serverHello.sid->len); + if(c->sid->len != 0 && c->sid->len != SidSize) { + tlsError(c, EIllegalParameter, "invalid server session identifier"); + goto Err; + } + if(!setAlgs(c, m.u.serverHello.cipher)) { + tlsError(c, EIllegalParameter, "invalid cipher suite"); + goto Err; + } + if(m.u.serverHello.compressor != CompressionNull) { + tlsError(c, EIllegalParameter, "invalid compression"); + goto Err; + } + msgClear(&m); + + /* certificate */ + if(!msgRecv(c, &m) || m.tag != HCertificate) { + tlsError(c, EUnexpectedMessage, "expected a certificate"); + goto Err; + } + if(m.u.certificate.ncert < 1) { + tlsError(c, EIllegalParameter, "runt certificate"); + goto Err; + } + c->cert = makebytes(m.u.certificate.certs[0]->data, m.u.certificate.certs[0]->len); + msgClear(&m); + + /* server key exchange (optional) */ + if(!msgRecv(c, &m)) + goto Err; + if(m.tag == HServerKeyExchange) { + tlsError(c, EUnexpectedMessage, "got an server key exchange"); + goto Err; + // If implementing this later, watch out for rollback attack + // described in Wagner Schneier 1996, section 4.4. + } + + /* certificate request (optional) */ + creq = 0; + if(m.tag == HCertificateRequest) { + creq = 1; + msgClear(&m); + if(!msgRecv(c, &m)) + goto Err; + } + + if(m.tag != HServerHelloDone) { + tlsError(c, EUnexpectedMessage, "expected a server hello done"); + goto Err; + } + msgClear(&m); + + if(tlsSecSecretc(c->sec, c->sid->data, c->sid->len, c->srandom, + c->cert->data, c->cert->len, c->version, &epm, &nepm, + kd, c->nsecret) < 0){ + tlsError(c, EBadCertificate, "invalid x509/rsa certificate"); + goto Err; + } + secrets = (char*)emalloc(2*c->nsecret); + enc64(secrets, 2*c->nsecret, kd, c->nsecret); + rv = fprint(c->ctl, "secret %s %s 1 %s", c->digest, c->enc, secrets); + memset(secrets, 0, 2*c->nsecret); + free(secrets); + memset(kd, 0, c->nsecret); + if(rv < 0){ + tlsError(c, EHandshakeFailure, "can't set keys: %r"); + goto Err; + } + + if(creq) { + /* send a zero length certificate */ + m.tag = HCertificate; + if(!msgSend(c, &m, AFlush)) + goto Err; + msgClear(&m); + } + + /* client key exchange */ + m.tag = HClientKeyExchange; + m.u.clientKeyExchange.key = makebytes(epm, nepm); + free(epm); + epm = nil; + if(m.u.clientKeyExchange.key == nil) { + tlsError(c, EHandshakeFailure, "can't set secret: %r"); + goto Err; + } + if(!msgSend(c, &m, AFlush)) + goto Err; + msgClear(&m); + + /* change cipher spec */ + if(fprint(c->ctl, "changecipher") < 0){ + tlsError(c, EInternalError, "can't enable cipher: %r"); + goto Err; + } + + // Cipherchange must occur immediately before Finished to avoid + // potential hole; see section 4.3 of Wagner Schneier 1996. + if(tlsSecFinished(c->sec, c->hsmd5, c->hssha1, c->finished.verify, c->finished.n, 1) < 0){ + tlsError(c, EInternalError, "can't set finished 1: %r"); + goto Err; + } + m.tag = HFinished; + m.u.finished = c->finished; + + if(!msgSend(c, &m, AFlush)) { + fprint(2, "tlsClient nepm=%d\n", nepm); + tlsError(c, EInternalError, "can't flush after client Finished: %r"); + goto Err; + } + msgClear(&m); + + if(tlsSecFinished(c->sec, c->hsmd5, c->hssha1, c->finished.verify, c->finished.n, 0) < 0){ + fprint(2, "tlsClient nepm=%d\n", nepm); + tlsError(c, EInternalError, "can't set finished 0: %r"); + goto Err; + } + if(!msgRecv(c, &m)) { + fprint(2, "tlsClient nepm=%d\n", nepm); + tlsError(c, EInternalError, "can't read server Finished: %r"); + goto Err; + } + if(m.tag != HFinished) { + fprint(2, "tlsClient nepm=%d\n", nepm); + tlsError(c, EUnexpectedMessage, "expected a Finished msg from server"); + goto Err; + } + + if(!finishedMatch(c, &m.u.finished)) { + tlsError(c, EHandshakeFailure, "finished verification failed"); + goto Err; + } + msgClear(&m); + + if(fprint(c->ctl, "opened") < 0){ + if(trace) + trace("unable to do final open: %r\n"); + goto Err; + } + tlsSecOk(c->sec); + return c; + +Err: + free(epm); + msgClear(&m); + tlsConnectionFree(c); + return 0; +} + + +//================= message functions ======================== + +static uchar sendbuf[9000], *sendp; + +static int +msgSend(TlsConnection *c, Msg *m, int act) +{ + uchar *p; // sendp = start of new message; p = write pointer + int nn, n, i; + + if(sendp == nil) + sendp = sendbuf; + p = sendp; + if(c->trace) + c->trace("send %s", msgPrint((char*)p, (sizeof sendbuf) - (p-sendbuf), m)); + + p[0] = m->tag; // header - fill in size later + p += 4; + + switch(m->tag) { + default: + tlsError(c, EInternalError, "can't encode a %d", m->tag); + goto Err; + case HClientHello: + // version + put16(p, m->u.clientHello.version); + p += 2; + + // random + memmove(p, m->u.clientHello.random, RandomSize); + p += RandomSize; + + // sid + n = m->u.clientHello.sid->len; + assert(n < 256); + p[0] = n; + memmove(p+1, m->u.clientHello.sid->data, n); + p += n+1; + + n = m->u.clientHello.ciphers->len; + assert(n > 0 && n < 200); + put16(p, n*2); + p += 2; + for(i=0; iu.clientHello.ciphers->data[i]); + p += 2; + } + + n = m->u.clientHello.compressors->len; + assert(n > 0); + p[0] = n; + memmove(p+1, m->u.clientHello.compressors->data, n); + p += n+1; + break; + case HServerHello: + put16(p, m->u.serverHello.version); + p += 2; + + // random + memmove(p, m->u.serverHello.random, RandomSize); + p += RandomSize; + + // sid + n = m->u.serverHello.sid->len; + assert(n < 256); + p[0] = n; + memmove(p+1, m->u.serverHello.sid->data, n); + p += n+1; + + put16(p, m->u.serverHello.cipher); + p += 2; + p[0] = m->u.serverHello.compressor; + p += 1; + break; + case HServerHelloDone: + break; + case HCertificate: + nn = 0; + for(i = 0; i < m->u.certificate.ncert; i++) + nn += 3 + m->u.certificate.certs[i]->len; + if(p + 3 + nn - sendbuf > sizeof(sendbuf)) { + tlsError(c, EInternalError, "output buffer too small for certificate"); + goto Err; + } + put24(p, nn); + p += 3; + for(i = 0; i < m->u.certificate.ncert; i++){ + put24(p, m->u.certificate.certs[i]->len); + p += 3; + memmove(p, m->u.certificate.certs[i]->data, m->u.certificate.certs[i]->len); + p += m->u.certificate.certs[i]->len; + } + break; + case HClientKeyExchange: + n = m->u.clientKeyExchange.key->len; + if(c->version != SSL3Version){ + put16(p, n); + p += 2; + } + memmove(p, m->u.clientKeyExchange.key->data, n); + p += n; + break; + case HFinished: + memmove(p, m->u.finished.verify, m->u.finished.n); + p += m->u.finished.n; + break; + } + + // go back and fill in size + n = p-sendp; + assert(p <= sendbuf+sizeof(sendbuf)); + put24(sendp+1, n-4); + + // remember hash of Handshake messages + if(m->tag != HHelloRequest) { + md5(sendp, n, 0, &c->hsmd5); + sha1(sendp, n, 0, &c->hssha1); + } + + sendp = p; + if(act == AFlush){ + sendp = sendbuf; + if(write(c->hand, sendbuf, p-sendbuf) < 0){ + fprint(2, "write error: %r\n"); + goto Err; + } + } + msgClear(m); + return 1; +Err: + msgClear(m); + return 0; +} + +static uchar* +tlsReadN(TlsConnection *c, int n) +{ + uchar *p; + int nn, nr; + + nn = c->ep - c->rp; + if(nn < n){ + if(c->rp != c->buf){ + memmove(c->buf, c->rp, nn); + c->rp = c->buf; + c->ep = &c->buf[nn]; + } + for(; nn < n; nn += nr) { + nr = read(c->hand, &c->rp[nn], n - nn); + if(nr <= 0) + return nil; + c->ep += nr; + } + } + p = c->rp; + c->rp += n; + return p; +} + +static int +msgRecv(TlsConnection *c, Msg *m) +{ + uchar *p; + int type, n, nn, i, nsid, nrandom, nciph; + + for(;;) { + p = tlsReadN(c, 4); + if(p == nil) + return 0; + type = p[0]; + n = get24(p+1); + + if(type != HHelloRequest) + break; + if(n != 0) { + tlsError(c, EDecodeError, "invalid hello request during handshake"); + return 0; + } + } + + if(n > sizeof(c->buf)) { + tlsError(c, EDecodeError, "handshake message too long %d %d", n, sizeof(c->buf)); + return 0; + } + + if(type == HSSL2ClientHello){ + /* Cope with an SSL3 ClientHello expressed in SSL2 record format. + This is sent by some clients that we must interoperate + with, such as Java's JSSE and Microsoft's Internet Explorer. */ + p = tlsReadN(c, n); + if(p == nil) + return 0; + md5(p, n, 0, &c->hsmd5); + sha1(p, n, 0, &c->hssha1); + m->tag = HClientHello; + if(n < 22) + goto Short; + m->u.clientHello.version = get16(p+1); + p += 3; + n -= 3; + nn = get16(p); /* cipher_spec_len */ + nsid = get16(p + 2); + nrandom = get16(p + 4); + p += 6; + n -= 6; + if(nsid != 0 /* no sid's, since shouldn't restart using ssl2 header */ + || nrandom < 16 || nn % 3) + goto Err; + if(c->trace && (n - nrandom != nn)) + c->trace("n-nrandom!=nn: n=%d nrandom=%d nn=%d\n", n, nrandom, nn); + /* ignore ssl2 ciphers and look for {0x00, ssl3 cipher} */ + nciph = 0; + for(i = 0; i < nn; i += 3) + if(p[i] == 0) + nciph++; + m->u.clientHello.ciphers = newints(nciph); + nciph = 0; + for(i = 0; i < nn; i += 3) + if(p[i] == 0) + m->u.clientHello.ciphers->data[nciph++] = get16(&p[i + 1]); + p += nn; + m->u.clientHello.sid = makebytes(nil, 0); + if(nrandom > RandomSize) + nrandom = RandomSize; + memset(m->u.clientHello.random, 0, RandomSize - nrandom); + memmove(&m->u.clientHello.random[RandomSize - nrandom], p, nrandom); + m->u.clientHello.compressors = newbytes(1); + m->u.clientHello.compressors->data[0] = CompressionNull; + goto Ok; + } + + md5(p, 4, 0, &c->hsmd5); + sha1(p, 4, 0, &c->hssha1); + + p = tlsReadN(c, n); + if(p == nil) + return 0; + + md5(p, n, 0, &c->hsmd5); + sha1(p, n, 0, &c->hssha1); + + m->tag = type; + + switch(type) { + default: + tlsError(c, EUnexpectedMessage, "can't decode a %d", type); + goto Err; + case HClientHello: + if(n < 2) + goto Short; + m->u.clientHello.version = get16(p); + p += 2; + n -= 2; + + if(n < RandomSize) + goto Short; + memmove(m->u.clientHello.random, p, RandomSize); + p += RandomSize; + n -= RandomSize; + if(n < 1 || n < p[0]+1) + goto Short; + m->u.clientHello.sid = makebytes(p+1, p[0]); + p += m->u.clientHello.sid->len+1; + n -= m->u.clientHello.sid->len+1; + + if(n < 2) + goto Short; + nn = get16(p); + p += 2; + n -= 2; + + if((nn & 1) || n < nn || nn < 2) + goto Short; + m->u.clientHello.ciphers = newints(nn >> 1); + for(i = 0; i < nn; i += 2) + m->u.clientHello.ciphers->data[i >> 1] = get16(&p[i]); + p += nn; + n -= nn; + + if(n < 1 || n < p[0]+1 || p[0] == 0) + goto Short; + nn = p[0]; + m->u.clientHello.compressors = newbytes(nn); + memmove(m->u.clientHello.compressors->data, p+1, nn); + n -= nn + 1; + break; + case HServerHello: + if(n < 2) + goto Short; + m->u.serverHello.version = get16(p); + p += 2; + n -= 2; + + if(n < RandomSize) + goto Short; + memmove(m->u.serverHello.random, p, RandomSize); + p += RandomSize; + n -= RandomSize; + + if(n < 1 || n < p[0]+1) + goto Short; + m->u.serverHello.sid = makebytes(p+1, p[0]); + p += m->u.serverHello.sid->len+1; + n -= m->u.serverHello.sid->len+1; + + if(n < 3) + goto Short; + m->u.serverHello.cipher = get16(p); + m->u.serverHello.compressor = p[2]; + n -= 3; + break; + case HCertificate: + if(n < 3) + goto Short; + nn = get24(p); + p += 3; + n -= 3; + if(n != nn) + goto Short; + /* certs */ + i = 0; + while(n > 0) { + if(n < 3) + goto Short; + nn = get24(p); + p += 3; + n -= 3; + if(nn > n) + goto Short; + m->u.certificate.ncert = i+1; + m->u.certificate.certs = erealloc(m->u.certificate.certs, (i+1)*sizeof(Bytes)); + m->u.certificate.certs[i] = makebytes(p, nn); + p += nn; + n -= nn; + i++; + } + break; + case HCertificateRequest: + if(n < 2) + goto Short; + nn = get16(p); + p += 2; + n -= 2; + if(nn < 1 || nn > n) + goto Short; + m->u.certificateRequest.types = makebytes(p, nn); + nn = get24(p); + p += 3; + n -= 3; + if(nn == 0 || n != nn) + goto Short; + /* cas */ + i = 0; + while(n > 0) { + if(n < 2) + goto Short; + nn = get16(p); + p += 2; + n -= 2; + if(nn < 1 || nn > n) + goto Short; + m->u.certificateRequest.nca = i+1; + m->u.certificateRequest.cas = erealloc(m->u.certificateRequest.cas, (i+1)*sizeof(Bytes)); + m->u.certificateRequest.cas[i] = makebytes(p, nn); + p += nn; + n -= nn; + i++; + } + break; + case HServerHelloDone: + break; + case HClientKeyExchange: + /* + * this message depends upon the encryption selected + * assume rsa. + */ + if(c->version == SSL3Version) + nn = n; + else{ + if(n < 2) + goto Short; + nn = get16(p); + p += 2; + n -= 2; + } + if(n < nn) + goto Short; + m->u.clientKeyExchange.key = makebytes(p, nn); + n -= nn; + break; + case HFinished: + m->u.finished.n = c->finished.n; + if(n < m->u.finished.n) + goto Short; + memmove(m->u.finished.verify, p, m->u.finished.n); + n -= m->u.finished.n; + break; + } + + if(type != HClientHello && n != 0) + goto Short; +Ok: + if(c->trace){ + char buf[8000]; + c->trace("recv %s", msgPrint(buf, sizeof buf, m)); + } + return 1; +Short: + tlsError(c, EDecodeError, "handshake message has invalid length"); +Err: + msgClear(m); + return 0; +} + +static void +msgClear(Msg *m) +{ + int i; + + switch(m->tag) { + default: + sysfatal("msgClear: unknown message type: %d\n", m->tag); + case HHelloRequest: + break; + case HClientHello: + freebytes(m->u.clientHello.sid); + freeints(m->u.clientHello.ciphers); + freebytes(m->u.clientHello.compressors); + break; + case HServerHello: + freebytes(m->u.clientHello.sid); + break; + case HCertificate: + for(i=0; iu.certificate.ncert; i++) + freebytes(m->u.certificate.certs[i]); + free(m->u.certificate.certs); + break; + case HCertificateRequest: + freebytes(m->u.certificateRequest.types); + for(i=0; iu.certificateRequest.nca; i++) + freebytes(m->u.certificateRequest.cas[i]); + free(m->u.certificateRequest.cas); + break; + case HServerHelloDone: + break; + case HClientKeyExchange: + freebytes(m->u.clientKeyExchange.key); + break; + case HFinished: + break; + } + memset(m, 0, sizeof(Msg)); +} + +static char * +bytesPrint(char *bs, char *be, char *s0, Bytes *b, char *s1) +{ + int i; + + if(s0) + bs = seprint(bs, be, "%s", s0); + bs = seprint(bs, be, "["); + if(b == nil) + bs = seprint(bs, be, "nil"); + else + for(i=0; ilen; i++) + bs = seprint(bs, be, "%.2x ", b->data[i]); + bs = seprint(bs, be, "]"); + if(s1) + bs = seprint(bs, be, "%s", s1); + return bs; +} + +static char * +intsPrint(char *bs, char *be, char *s0, Ints *b, char *s1) +{ + int i; + + if(s0) + bs = seprint(bs, be, "%s", s0); + bs = seprint(bs, be, "["); + if(b == nil) + bs = seprint(bs, be, "nil"); + else + for(i=0; ilen; i++) + bs = seprint(bs, be, "%x ", b->data[i]); + bs = seprint(bs, be, "]"); + if(s1) + bs = seprint(bs, be, "%s", s1); + return bs; +} + +static char* +msgPrint(char *buf, int n, Msg *m) +{ + int i; + char *bs = buf, *be = buf+n; + + switch(m->tag) { + default: + bs = seprint(bs, be, "unknown %d\n", m->tag); + break; + case HClientHello: + bs = seprint(bs, be, "ClientHello\n"); + bs = seprint(bs, be, "\tversion: %.4x\n", m->u.clientHello.version); + bs = seprint(bs, be, "\trandom: "); + for(i=0; iu.clientHello.random[i]); + bs = seprint(bs, be, "\n"); + bs = bytesPrint(bs, be, "\tsid: ", m->u.clientHello.sid, "\n"); + bs = intsPrint(bs, be, "\tciphers: ", m->u.clientHello.ciphers, "\n"); + bs = bytesPrint(bs, be, "\tcompressors: ", m->u.clientHello.compressors, "\n"); + break; + case HServerHello: + bs = seprint(bs, be, "ServerHello\n"); + bs = seprint(bs, be, "\tversion: %.4x\n", m->u.serverHello.version); + bs = seprint(bs, be, "\trandom: "); + for(i=0; iu.serverHello.random[i]); + bs = seprint(bs, be, "\n"); + bs = bytesPrint(bs, be, "\tsid: ", m->u.serverHello.sid, "\n"); + bs = seprint(bs, be, "\tcipher: %.4x\n", m->u.serverHello.cipher); + bs = seprint(bs, be, "\tcompressor: %.2x\n", m->u.serverHello.compressor); + break; + case HCertificate: + bs = seprint(bs, be, "Certificate\n"); + for(i=0; iu.certificate.ncert; i++) + bs = bytesPrint(bs, be, "\t", m->u.certificate.certs[i], "\n"); + break; + case HCertificateRequest: + bs = seprint(bs, be, "CertificateRequest\n"); + bs = bytesPrint(bs, be, "\ttypes: ", m->u.certificateRequest.types, "\n"); + bs = seprint(bs, be, "\tcertificateauthorities\n"); + for(i=0; iu.certificateRequest.nca; i++) + bs = bytesPrint(bs, be, "\t\t", m->u.certificateRequest.cas[i], "\n"); + break; + case HServerHelloDone: + bs = seprint(bs, be, "ServerHelloDone\n"); + break; + case HClientKeyExchange: + bs = seprint(bs, be, "HClientKeyExchange\n"); + bs = bytesPrint(bs, be, "\tkey: ", m->u.clientKeyExchange.key, "\n"); + break; + case HFinished: + bs = seprint(bs, be, "HFinished\n"); + for(i=0; iu.finished.n; i++) + bs = seprint(bs, be, "%.2x", m->u.finished.verify[i]); + bs = seprint(bs, be, "\n"); + break; + } + USED(bs); + return buf; +} + +static void +tlsError(TlsConnection *c, int err, char *fmt, ...) +{ + char msg[512]; + va_list arg; + + va_start(arg, fmt); + vseprint(msg, msg+sizeof(msg), fmt, arg); + va_end(arg); + if(c->trace) + c->trace("tlsError: %s\n", msg); + else if(c->erred) + fprint(2, "double error: %r, %s", msg); + else + werrstr("tls: local %s", msg); + c->erred = 1; + fprint(c->ctl, "alert %d", err); +} + +// commit to specific version number +static int +setVersion(TlsConnection *c, int version) +{ + if(c->verset || version > MaxProtoVersion || version < MinProtoVersion) + return -1; + if(version > c->version) + version = c->version; + if(version == SSL3Version) { + c->version = version; + c->finished.n = SSL3FinishedLen; + }else if(version == TLSVersion){ + c->version = version; + c->finished.n = TLSFinishedLen; + }else + return -1; + c->verset = 1; + return fprint(c->ctl, "version 0x%x", version); +} + +// confirm that received Finished message matches the expected value +static int +finishedMatch(TlsConnection *c, Finished *f) +{ + return memcmp(f->verify, c->finished.verify, f->n) == 0; +} + +// free memory associated with TlsConnection struct +// (but don't close the TLS channel itself) +static void +tlsConnectionFree(TlsConnection *c) +{ + tlsSecClose(c->sec); + freebytes(c->sid); + freebytes(c->cert); + memset(c, 0, sizeof(c)); + free(c); +} + + +//================= cipher choices ======================== + +static int weakCipher[CipherMax] = +{ + 1, /* TLS_NULL_WITH_NULL_NULL */ + 1, /* TLS_RSA_WITH_NULL_MD5 */ + 1, /* TLS_RSA_WITH_NULL_SHA */ + 1, /* TLS_RSA_EXPORT_WITH_RC4_40_MD5 */ + 0, /* TLS_RSA_WITH_RC4_128_MD5 */ + 0, /* TLS_RSA_WITH_RC4_128_SHA */ + 1, /* TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 */ + 0, /* TLS_RSA_WITH_IDEA_CBC_SHA */ + 1, /* TLS_RSA_EXPORT_WITH_DES40_CBC_SHA */ + 0, /* TLS_RSA_WITH_DES_CBC_SHA */ + 0, /* TLS_RSA_WITH_3DES_EDE_CBC_SHA */ + 1, /* TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA */ + 0, /* TLS_DH_DSS_WITH_DES_CBC_SHA */ + 0, /* TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA */ + 1, /* TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA */ + 0, /* TLS_DH_RSA_WITH_DES_CBC_SHA */ + 0, /* TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA */ + 1, /* TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA */ + 0, /* TLS_DHE_DSS_WITH_DES_CBC_SHA */ + 0, /* TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA */ + 1, /* TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA */ + 0, /* TLS_DHE_RSA_WITH_DES_CBC_SHA */ + 0, /* TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA */ + 1, /* TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 */ + 1, /* TLS_DH_anon_WITH_RC4_128_MD5 */ + 1, /* TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA */ + 1, /* TLS_DH_anon_WITH_DES_CBC_SHA */ + 1, /* TLS_DH_anon_WITH_3DES_EDE_CBC_SHA */ +}; + +static int +setAlgs(TlsConnection *c, int a) +{ + int i; + + for(i = 0; i < nelem(cipherAlgs); i++){ + if(cipherAlgs[i].tlsid == a){ + c->enc = cipherAlgs[i].enc; + c->digest = cipherAlgs[i].digest; + c->nsecret = cipherAlgs[i].nsecret; + if(c->nsecret > MaxKeyData) + return 0; + return 1; + } + } + return 0; +} + +static int +okCipher(Ints *cv) +{ + int weak, i, j, c; + + weak = 1; + for(i = 0; i < cv->len; i++) { + c = cv->data[i]; + if(c >= CipherMax) + weak = 0; + else + weak &= weakCipher[c]; + for(j = 0; j < nelem(cipherAlgs); j++) + if(cipherAlgs[j].ok && cipherAlgs[j].tlsid == c) + return c; + } + if(weak) + return -2; + return -1; +} + +static int +okCompression(Bytes *cv) +{ + int i, j, c; + + for(i = 0; i < cv->len; i++) { + c = cv->data[i]; + for(j = 0; j < nelem(compressors); j++) { + if(compressors[j] == c) + return c; + } + } + return -1; +} + +static Lock ciphLock; +static int nciphers; + +static int +initCiphers(void) +{ + enum {MaxAlgF = 1024, MaxAlgs = 10}; + char s[MaxAlgF], *flds[MaxAlgs]; + int i, j, n, ok; + + lock(&ciphLock); + if(nciphers){ + unlock(&ciphLock); + return nciphers; + } + j = open("#a/tls/encalgs", OREAD); + if(j < 0){ + werrstr("can't open #a/tls/encalgs: %r"); + return 0; + } + n = read(j, s, MaxAlgF-1); + close(j); + if(n <= 0){ + werrstr("nothing in #a/tls/encalgs: %r"); + return 0; + } + s[n] = 0; + n = getfields(s, flds, MaxAlgs, 1, " \t\r\n"); + for(i = 0; i < nelem(cipherAlgs); i++){ + ok = 0; + for(j = 0; j < n; j++){ + if(strcmp(cipherAlgs[i].enc, flds[j]) == 0){ + ok = 1; + break; + } + } + cipherAlgs[i].ok = ok; + } + + j = open("#a/tls/hashalgs", OREAD); + if(j < 0){ + werrstr("can't open #a/tls/hashalgs: %r"); + return 0; + } + n = read(j, s, MaxAlgF-1); + close(j); + if(n <= 0){ + werrstr("nothing in #a/tls/hashalgs: %r"); + return 0; + } + s[n] = 0; + n = getfields(s, flds, MaxAlgs, 1, " \t\r\n"); + for(i = 0; i < nelem(cipherAlgs); i++){ + ok = 0; + for(j = 0; j < n; j++){ + if(strcmp(cipherAlgs[i].digest, flds[j]) == 0){ + ok = 1; + break; + } + } + cipherAlgs[i].ok &= ok; + if(cipherAlgs[i].ok) + nciphers++; + } + unlock(&ciphLock); + return nciphers; +} + +static Ints* +makeciphers(void) +{ + Ints *is; + int i, j; + + is = newints(nciphers); + j = 0; + for(i = 0; i < nelem(cipherAlgs); i++){ + if(cipherAlgs[i].ok) + is->data[j++] = cipherAlgs[i].tlsid; + } + return is; +} + + + +//================= security functions ======================== + +// given X.509 certificate, set up connection to factotum +// for using corresponding private key +static AuthRpc* +factotum_rsa_open(uchar *cert, int certlen) +{ + int afd; + char *s; + mpint *pub = nil; + RSApub *rsapub; + AuthRpc *rpc; + + // start talking to factotum + if((afd = open("/mnt/factotum/rpc", ORDWR)) < 0) + return nil; + if((rpc = auth_allocrpc(afd)) == nil){ + close(afd); + return nil; + } + s = "proto=rsa service=tls role=client"; + if(auth_rpc(rpc, "start", s, strlen(s)) != ARok){ + factotum_rsa_close(rpc); + return nil; + } + + // roll factotum keyring around to match certificate + rsapub = X509toRSApub(cert, certlen, nil, 0); + while(1){ + if(auth_rpc(rpc, "read", nil, 0) != ARok){ + factotum_rsa_close(rpc); + rpc = nil; + goto done; + } + pub = strtomp(rpc->arg, nil, 16, nil); + assert(pub != nil); + if(mpcmp(pub,rsapub->n) == 0) + break; + } +done: + mpfree(pub); + rsapubfree(rsapub); + return rpc; +} + +static mpint* +factotum_rsa_decrypt(AuthRpc *rpc, mpint *cipher) +{ + char *p; + int rv; + + if((p = mptoa(cipher, 16, nil, 0)) == nil) + return nil; + rv = auth_rpc(rpc, "write", p, strlen(p)); + free(p); + if(rv != ARok || auth_rpc(rpc, "read", nil, 0) != ARok) + return nil; + mpfree(cipher); + return strtomp(rpc->arg, nil, 16, nil); +} + +static void +factotum_rsa_close(AuthRpc*rpc) +{ + if(!rpc) + return; + close(rpc->afd); + auth_freerpc(rpc); +} + +static void +tlsPmd5(uchar *buf, int nbuf, uchar *key, int nkey, uchar *label, int nlabel, uchar *seed0, int nseed0, uchar *seed1, int nseed1) +{ + uchar ai[MD5dlen], tmp[MD5dlen]; + int i, n; + MD5state *s; + + // generate a1 + s = hmac_md5(label, nlabel, key, nkey, nil, nil); + s = hmac_md5(seed0, nseed0, key, nkey, nil, s); + hmac_md5(seed1, nseed1, key, nkey, ai, s); + + while(nbuf > 0) { + s = hmac_md5(ai, MD5dlen, key, nkey, nil, nil); + s = hmac_md5(label, nlabel, key, nkey, nil, s); + s = hmac_md5(seed0, nseed0, key, nkey, nil, s); + hmac_md5(seed1, nseed1, key, nkey, tmp, s); + n = MD5dlen; + if(n > nbuf) + n = nbuf; + for(i = 0; i < n; i++) + buf[i] ^= tmp[i]; + buf += n; + nbuf -= n; + hmac_md5(ai, MD5dlen, key, nkey, tmp, nil); + memmove(ai, tmp, MD5dlen); + } +} + +static void +tlsPsha1(uchar *buf, int nbuf, uchar *key, int nkey, uchar *label, int nlabel, uchar *seed0, int nseed0, uchar *seed1, int nseed1) +{ + uchar ai[SHA1dlen], tmp[SHA1dlen]; + int i, n; + SHAstate *s; + + // generate a1 + s = hmac_sha1(label, nlabel, key, nkey, nil, nil); + s = hmac_sha1(seed0, nseed0, key, nkey, nil, s); + hmac_sha1(seed1, nseed1, key, nkey, ai, s); + + while(nbuf > 0) { + s = hmac_sha1(ai, SHA1dlen, key, nkey, nil, nil); + s = hmac_sha1(label, nlabel, key, nkey, nil, s); + s = hmac_sha1(seed0, nseed0, key, nkey, nil, s); + hmac_sha1(seed1, nseed1, key, nkey, tmp, s); + n = SHA1dlen; + if(n > nbuf) + n = nbuf; + for(i = 0; i < n; i++) + buf[i] ^= tmp[i]; + buf += n; + nbuf -= n; + hmac_sha1(ai, SHA1dlen, key, nkey, tmp, nil); + memmove(ai, tmp, SHA1dlen); + } +} + +// fill buf with md5(args)^sha1(args) +static void +tlsPRF(uchar *buf, int nbuf, uchar *key, int nkey, char *label, uchar *seed0, int nseed0, uchar *seed1, int nseed1) +{ + int i; + int nlabel = strlen(label); + int n = (nkey + 1) >> 1; + + for(i = 0; i < nbuf; i++) + buf[i] = 0; + tlsPmd5(buf, nbuf, key, n, (uchar*)label, nlabel, seed0, nseed0, seed1, nseed1); + tlsPsha1(buf, nbuf, key+nkey-n, n, (uchar*)label, nlabel, seed0, nseed0, seed1, nseed1); +} + +/* + * for setting server session id's + */ +static Lock sidLock; +static long maxSid = 1; + +/* the keys are verified to have the same public components + * and to function correctly with pkcs 1 encryption and decryption. */ +static TlsSec* +tlsSecInits(int cvers, uchar *csid, int ncsid, uchar *crandom, uchar *ssid, int *nssid, uchar *srandom) +{ + TlsSec *sec = emalloc(sizeof(*sec)); + + USED(csid); USED(ncsid); // ignore csid for now + + memmove(sec->crandom, crandom, RandomSize); + sec->clientVers = cvers; + + put32(sec->srandom, time(0)); + genrandom(sec->srandom+4, RandomSize-4); + memmove(srandom, sec->srandom, RandomSize); + + /* + * make up a unique sid: use our pid, and and incrementing id + * can signal no sid by setting nssid to 0. + */ + memset(ssid, 0, SidSize); + put32(ssid, getpid()); + lock(&sidLock); + put32(ssid+4, maxSid++); + unlock(&sidLock); + *nssid = SidSize; + return sec; +} + +static int +tlsSecSecrets(TlsSec *sec, int vers, uchar *epm, int nepm, uchar *kd, int nkd) +{ + if(epm != nil){ + if(setVers(sec, vers) < 0) + goto Err; + serverMasterSecret(sec, epm, nepm); + }else if(sec->vers != vers){ + werrstr("mismatched session versions"); + goto Err; + } + setSecrets(sec, kd, nkd); + return 0; +Err: + sec->ok = -1; + return -1; +} + +static TlsSec* +tlsSecInitc(int cvers, uchar *crandom) +{ + TlsSec *sec = emalloc(sizeof(*sec)); + sec->clientVers = cvers; + put32(sec->crandom, time(0)); + genrandom(sec->crandom+4, RandomSize-4); + memmove(crandom, sec->crandom, RandomSize); + return sec; +} + +static int +tlsSecSecretc(TlsSec *sec, uchar *sid, int nsid, uchar *srandom, uchar *cert, int ncert, int vers, uchar **epm, int *nepm, uchar *kd, int nkd) +{ + RSApub *pub; + + pub = nil; + + USED(sid); + USED(nsid); + + memmove(sec->srandom, srandom, RandomSize); + + if(setVers(sec, vers) < 0) + goto Err; + + pub = X509toRSApub(cert, ncert, nil, 0); + if(pub == nil){ + werrstr("invalid x509/rsa certificate"); + goto Err; + } + if(clientMasterSecret(sec, pub, epm, nepm) < 0) + goto Err; + rsapubfree(pub); + setSecrets(sec, kd, nkd); + return 0; + +Err: + if(pub != nil) + rsapubfree(pub); + sec->ok = -1; + return -1; +} + +static int +tlsSecFinished(TlsSec *sec, MD5state md5, SHAstate sha1, uchar *fin, int nfin, int isclient) +{ + if(sec->nfin != nfin){ + sec->ok = -1; + werrstr("invalid finished exchange"); + return -1; + } + md5.malloced = 0; + sha1.malloced = 0; + (*sec->setFinished)(sec, md5, sha1, fin, isclient); + return 1; +} + +static void +tlsSecOk(TlsSec *sec) +{ + if(sec->ok == 0) + sec->ok = 1; +} + +static void +tlsSecKill(TlsSec *sec) +{ + if(!sec) + return; + factotum_rsa_close(sec->rpc); + sec->ok = -1; +} + +static void +tlsSecClose(TlsSec *sec) +{ + if(!sec) + return; + factotum_rsa_close(sec->rpc); + free(sec->server); + free(sec); +} + +static int +setVers(TlsSec *sec, int v) +{ + if(v == SSL3Version){ + sec->setFinished = sslSetFinished; + sec->nfin = SSL3FinishedLen; + sec->prf = sslPRF; + }else if(v == TLSVersion){ + sec->setFinished = tlsSetFinished; + sec->nfin = TLSFinishedLen; + sec->prf = tlsPRF; + }else{ + werrstr("invalid version"); + return -1; + } + sec->vers = v; + return 0; +} + +/* + * generate secret keys from the master secret. + * + * different crypto selections will require different amounts + * of key expansion and use of key expansion data, + * but it's all generated using the same function. + */ +static void +setSecrets(TlsSec *sec, uchar *kd, int nkd) +{ + (*sec->prf)(kd, nkd, sec->sec, MasterSecretSize, "key expansion", + sec->srandom, RandomSize, sec->crandom, RandomSize); +} + +/* + * set the master secret from the pre-master secret. + */ +static void +setMasterSecret(TlsSec *sec, Bytes *pm) +{ + (*sec->prf)(sec->sec, MasterSecretSize, pm->data, MasterSecretSize, "master secret", + sec->crandom, RandomSize, sec->srandom, RandomSize); +} + +static void +serverMasterSecret(TlsSec *sec, uchar *epm, int nepm) +{ + Bytes *pm; + + pm = pkcs1_decrypt(sec, epm, nepm); + + // if the client messed up, just continue as if everything is ok, + // to prevent attacks to check for correctly formatted messages. + // Hence the fprint(2,) can't be replaced by tlsError(), which sends an Alert msg to the client. + if(sec->ok < 0 || pm == nil || get16(pm->data) != sec->clientVers){ + fprint(2, "serverMasterSecret failed ok=%d pm=%p pmvers=%x cvers=%x nepm=%d\n", + sec->ok, pm, pm ? get16(pm->data) : -1, sec->clientVers, nepm); + sec->ok = -1; + if(pm != nil) + freebytes(pm); + pm = newbytes(MasterSecretSize); + genrandom(pm->data, MasterSecretSize); + } + setMasterSecret(sec, pm); + memset(pm->data, 0, pm->len); + freebytes(pm); +} + +static int +clientMasterSecret(TlsSec *sec, RSApub *pub, uchar **epm, int *nepm) +{ + Bytes *pm, *key; + + pm = newbytes(MasterSecretSize); + put16(pm->data, sec->clientVers); + genrandom(pm->data+2, MasterSecretSize - 2); + + setMasterSecret(sec, pm); + + key = pkcs1_encrypt(pm, pub, 2); + memset(pm->data, 0, pm->len); + freebytes(pm); + if(key == nil){ + werrstr("tls pkcs1_encrypt failed"); + return -1; + } + + *nepm = key->len; + *epm = malloc(*nepm); + if(*epm == nil){ + freebytes(key); + werrstr("out of memory"); + return -1; + } + memmove(*epm, key->data, *nepm); + + freebytes(key); + + return 1; +} + +static void +sslSetFinished(TlsSec *sec, MD5state hsmd5, SHAstate hssha1, uchar *finished, int isClient) +{ + DigestState *s; + uchar h0[MD5dlen], h1[SHA1dlen], pad[48]; + char *label; + + if(isClient) + label = "CLNT"; + else + label = "SRVR"; + + md5((uchar*)label, 4, nil, &hsmd5); + md5(sec->sec, MasterSecretSize, nil, &hsmd5); + memset(pad, 0x36, 48); + md5(pad, 48, nil, &hsmd5); + md5(nil, 0, h0, &hsmd5); + memset(pad, 0x5C, 48); + s = md5(sec->sec, MasterSecretSize, nil, nil); + s = md5(pad, 48, nil, s); + md5(h0, MD5dlen, finished, s); + + sha1((uchar*)label, 4, nil, &hssha1); + sha1(sec->sec, MasterSecretSize, nil, &hssha1); + memset(pad, 0x36, 40); + sha1(pad, 40, nil, &hssha1); + sha1(nil, 0, h1, &hssha1); + memset(pad, 0x5C, 40); + s = sha1(sec->sec, MasterSecretSize, nil, nil); + s = sha1(pad, 40, nil, s); + sha1(h1, SHA1dlen, finished + MD5dlen, s); +} + +// fill "finished" arg with md5(args)^sha1(args) +static void +tlsSetFinished(TlsSec *sec, MD5state hsmd5, SHAstate hssha1, uchar *finished, int isClient) +{ + uchar h0[MD5dlen], h1[SHA1dlen]; + char *label; + + // get current hash value, but allow further messages to be hashed in + md5(nil, 0, h0, &hsmd5); + sha1(nil, 0, h1, &hssha1); + + if(isClient) + label = "client finished"; + else + label = "server finished"; + tlsPRF(finished, TLSFinishedLen, sec->sec, MasterSecretSize, label, h0, MD5dlen, h1, SHA1dlen); +} + +static void +sslPRF(uchar *buf, int nbuf, uchar *key, int nkey, char *label, uchar *seed0, int nseed0, uchar *seed1, int nseed1) +{ + DigestState *s; + uchar sha1dig[SHA1dlen], md5dig[MD5dlen], tmp[26]; + int i, n, len; + + USED(label); + len = 1; + while(nbuf > 0){ + if(len > 26) + return; + for(i = 0; i < len; i++) + tmp[i] = 'A' - 1 + len; + s = sha1(tmp, len, nil, nil); + s = sha1(key, nkey, nil, s); + s = sha1(seed0, nseed0, nil, s); + sha1(seed1, nseed1, sha1dig, s); + s = md5(key, nkey, nil, nil); + md5(sha1dig, SHA1dlen, md5dig, s); + n = MD5dlen; + if(n > nbuf) + n = nbuf; + memmove(buf, md5dig, n); + buf += n; + nbuf -= n; + len++; + } +} + +static mpint* +bytestomp(Bytes* bytes) +{ + mpint* ans; + + ans = betomp(bytes->data, bytes->len, nil); + return ans; +} + +/* + * Convert mpint* to Bytes, putting high order byte first. + */ +static Bytes* +mptobytes(mpint* big) +{ + int n, m; + uchar *a; + Bytes* ans; + + n = (mpsignif(big)+7)/8; + m = mptobe(big, nil, n, &a); + ans = makebytes(a, m); + return ans; +} + +// Do RSA computation on block according to key, and pad +// result on left with zeros to make it modlen long. +static Bytes* +rsacomp(Bytes* block, RSApub* key, int modlen) +{ + mpint *x, *y; + Bytes *a, *ybytes; + int ylen; + + x = bytestomp(block); + y = rsaencrypt(key, x, nil); + mpfree(x); + ybytes = mptobytes(y); + ylen = ybytes->len; + + if(ylen < modlen) { + a = newbytes(modlen); + memset(a->data, 0, modlen-ylen); + memmove(a->data+modlen-ylen, ybytes->data, ylen); + freebytes(ybytes); + ybytes = a; + } + else if(ylen > modlen) { + // assume it has leading zeros (mod should make it so) + a = newbytes(modlen); + memmove(a->data, ybytes->data, modlen); + freebytes(ybytes); + ybytes = a; + } + mpfree(y); + return ybytes; +} + +// encrypt data according to PKCS#1, /lib/rfc/rfc2437 9.1.2.1 +static Bytes* +pkcs1_encrypt(Bytes* data, RSApub* key, int blocktype) +{ + Bytes *pad, *eb, *ans; + int i, dlen, padlen, modlen; + + modlen = (mpsignif(key->n)+7)/8; + dlen = data->len; + if(modlen < 12 || dlen > modlen - 11) + return nil; + padlen = modlen - 3 - dlen; + pad = newbytes(padlen); + genrandom(pad->data, padlen); + for(i = 0; i < padlen; i++) { + if(blocktype == 0) + pad->data[i] = 0; + else if(blocktype == 1) + pad->data[i] = 255; + else if(pad->data[i] == 0) + pad->data[i] = 1; + } + eb = newbytes(modlen); + eb->data[0] = 0; + eb->data[1] = blocktype; + memmove(eb->data+2, pad->data, padlen); + eb->data[padlen+2] = 0; + memmove(eb->data+padlen+3, data->data, dlen); + ans = rsacomp(eb, key, modlen); + freebytes(eb); + freebytes(pad); + return ans; +} + +// decrypt data according to PKCS#1, with given key. +// expect a block type of 2. +static Bytes* +pkcs1_decrypt(TlsSec *sec, uchar *epm, int nepm) +{ + Bytes *eb, *ans = nil; + int i, modlen; + mpint *x, *y; + + modlen = (mpsignif(sec->rsapub->n)+7)/8; + if(nepm != modlen) + return nil; + x = betomp(epm, nepm, nil); + y = factotum_rsa_decrypt(sec->rpc, x); + if(y == nil) + return nil; + eb = mptobytes(y); + if(eb->len < modlen){ // pad on left with zeros + ans = newbytes(modlen); + memset(ans->data, 0, modlen-eb->len); + memmove(ans->data+modlen-eb->len, eb->data, eb->len); + freebytes(eb); + eb = ans; + } + if(eb->data[0] == 0 && eb->data[1] == 2) { + for(i = 2; i < modlen; i++) + if(eb->data[i] == 0) + break; + if(i < modlen - 1) + ans = makebytes(eb->data+i+1, modlen-(i+1)); + } + freebytes(eb); + return ans; +} + + +//================= general utility functions ======================== + +static void * +emalloc(int n) +{ + void *p; + if(n==0) + n=1; + p = malloc(n); + if(p == nil){ + exits("out of memory"); + } + memset(p, 0, n); + return p; +} + +static void * +erealloc(void *ReallocP, int ReallocN) +{ + if(ReallocN == 0) + ReallocN = 1; + if(!ReallocP) + ReallocP = emalloc(ReallocN); + else if(!(ReallocP = realloc(ReallocP, ReallocN))){ + exits("out of memory"); + } + return(ReallocP); +} + +static void +put32(uchar *p, u32int x) +{ + p[0] = x>>24; + p[1] = x>>16; + p[2] = x>>8; + p[3] = x; +} + +static void +put24(uchar *p, int x) +{ + p[0] = x>>16; + p[1] = x>>8; + p[2] = x; +} + +static void +put16(uchar *p, int x) +{ + p[0] = x>>8; + p[1] = x; +} + +static u32int +get32(uchar *p) +{ + return (p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3]; +} + +static int +get24(uchar *p) +{ + return (p[0]<<16)|(p[1]<<8)|p[2]; +} + +static int +get16(uchar *p) +{ + return (p[0]<<8)|p[1]; +} + +/* ANSI offsetof() */ +#define OFFSET(x, s) ((int)(&(((s*)0)->x))) + +/* + * malloc and return a new Bytes structure capable of + * holding len bytes. (len >= 0) + * Used to use crypt_malloc, which aborts if malloc fails. + */ +static Bytes* +newbytes(int len) +{ + Bytes* ans; + + ans = (Bytes*)malloc(OFFSET(data[0], Bytes) + len); + ans->len = len; + return ans; +} + +/* + * newbytes(len), with data initialized from buf + */ +static Bytes* +makebytes(uchar* buf, int len) +{ + Bytes* ans; + + ans = newbytes(len); + memmove(ans->data, buf, len); + return ans; +} + +static void +freebytes(Bytes* b) +{ + if(b != nil) + free(b); +} + +/* len is number of ints */ +static Ints* +newints(int len) +{ + Ints* ans; + + ans = (Ints*)malloc(OFFSET(data[0], Ints) + len*sizeof(int)); + ans->len = len; + return ans; +} + +static Ints* +makeints(int* buf, int len) +{ + Ints* ans; + + ans = newints(len); + if(len > 0) + memmove(ans->data, buf, len*sizeof(int)); + return ans; +} + +static void +freeints(Ints* b) +{ + if(b != nil) + free(b); +} diff --git a/src/libsec/port/x509.c b/src/libsec/port/x509.c new file mode 100644 index 00000000..7aa0dd70 --- /dev/null +++ b/src/libsec/port/x509.c @@ -0,0 +1,2524 @@ +#include +#include +#include +#include + +typedef DigestState*(*DigestFun)(uchar*,ulong,uchar*,DigestState*); + +/* ANSI offsetof, backwards. */ +#define OFFSETOF(a, b) offsetof(b, a) + +/*=============================================================*/ +/* general ASN1 declarations and parsing + * + * For now, this is used only for extracting the key from an + * X509 certificate, so the entire collection is hidden. But + * someday we should probably make the functions visible and + * give them their own man page. + */ +typedef struct Elem Elem; +typedef struct Tag Tag; +typedef struct Value Value; +typedef struct Bytes Bytes; +typedef struct Ints Ints; +typedef struct Bits Bits; +typedef struct Elist Elist; + +/* tag classes */ +#define Universal 0 +#define Context 0x80 + +/* universal tags */ +#define BOOLEAN 1 +#define INTEGER 2 +#define BIT_STRING 3 +#define OCTET_STRING 4 +#define NULLTAG 5 +#define OBJECT_ID 6 +#define ObjectDescriptor 7 +#define EXTERNAL 8 +#define REAL 9 +#define ENUMERATED 10 +#define EMBEDDED_PDV 11 +#define SEQUENCE 16 /* also SEQUENCE OF */ +#define SETOF 17 /* also SETOF OF */ +#define NumericString 18 +#define PrintableString 19 +#define TeletexString 20 +#define VideotexString 21 +#define IA5String 22 +#define UTCTime 23 +#define GeneralizedTime 24 +#define GraphicString 25 +#define VisibleString 26 +#define GeneralString 27 +#define UniversalString 28 +#define BMPString 30 + +struct Bytes { + int len; + uchar data[1]; +}; + +struct Ints { + int len; + int data[1]; +}; + +struct Bits { + int len; /* number of bytes */ + int unusedbits; /* unused bits in last byte */ + uchar data[1]; /* most-significant bit first */ +}; + +struct Tag { + int class; + int num; +}; + +enum { VBool, VInt, VOctets, VBigInt, VReal, VOther, + VBitString, VNull, VEOC, VObjId, VString, VSeq, VSet }; +struct Value { + int tag; /* VBool, etc. */ + union { + int boolval; + int intval; + Bytes* octetsval; + Bytes* bigintval; + Bytes* realval; /* undecoded; hardly ever used */ + Bytes* otherval; + Bits* bitstringval; + Ints* objidval; + char* stringval; + Elist* seqval; + Elist* setval; + } u; /* (Don't use anonymous unions, for ease of porting) */ +}; + +struct Elem { + Tag tag; + Value val; +}; + +struct Elist { + Elist* tl; + Elem hd; +}; + +/* decoding errors */ +enum { ASN_OK, ASN_ESHORT, ASN_ETOOBIG, ASN_EVALLEN, + ASN_ECONSTR, ASN_EPRIM, ASN_EINVAL, ASN_EUNIMPL }; + + +/* here are the functions to consider making extern someday */ +static Bytes* newbytes(int len); +static Bytes* makebytes(uchar* buf, int len); +static void freebytes(Bytes* b); +static Bytes* catbytes(Bytes* b1, Bytes* b2); +static Ints* newints(int len); +static Ints* makeints(int* buf, int len); +static void freeints(Ints* b); +static Bits* newbits(int len); +static Bits* makebits(uchar* buf, int len, int unusedbits); +static void freebits(Bits* b); +static Elist* mkel(Elem e, Elist* tail); +static void freeelist(Elist* el); +static int elistlen(Elist* el); +static int is_seq(Elem* pe, Elist** pseq); +static int is_set(Elem* pe, Elist** pset); +static int is_int(Elem* pe, int* pint); +static int is_bigint(Elem* pe, Bytes** pbigint); +static int is_bitstring(Elem* pe, Bits** pbits); +static int is_octetstring(Elem* pe, Bytes** poctets); +static int is_oid(Elem* pe, Ints** poid); +static int is_string(Elem* pe, char** pstring); +static int is_time(Elem* pe, char** ptime); +static int decode(uchar* a, int alen, Elem* pelem); +static int decode_seq(uchar* a, int alen, Elist** pelist); +static int decode_value(uchar* a, int alen, int kind, int isconstr, Value* pval); +static int encode(Elem e, Bytes** pbytes); +static int oid_lookup(Ints* o, Ints** tab); +static void freevalfields(Value* v); +static mpint *asn1mpint(Elem *e); + + + +#define TAG_MASK 0x1F +#define CONSTR_MASK 0x20 +#define CLASS_MASK 0xC0 +#define MAXOBJIDLEN 20 + +static int ber_decode(uchar** pp, uchar* pend, Elem* pelem); +static int tag_decode(uchar** pp, uchar* pend, Tag* ptag, int* pisconstr); +static int length_decode(uchar** pp, uchar* pend, int* plength); +static int value_decode(uchar** pp, uchar* pend, int length, int kind, int isconstr, Value* pval); +static int int_decode(uchar** pp, uchar* pend, int count, int unsgned, int* pint); +static int uint7_decode(uchar** pp, uchar* pend, int* pint); +static int octet_decode(uchar** pp, uchar* pend, int length, int isconstr, Bytes** pbytes); +static int seq_decode(uchar** pp, uchar* pend, int length, int isconstr, Elist** pelist); +static int enc(uchar** pp, Elem e, int lenonly); +static int val_enc(uchar** pp, Elem e, int *pconstr, int lenonly); +static void uint7_enc(uchar** pp, int num, int lenonly); +static void int_enc(uchar** pp, int num, int unsgned, int lenonly); + +static void * +emalloc(int n) +{ + void *p; + if(n==0) + n=1; + p = malloc(n); + if(p == nil){ + exits("out of memory"); + } + memset(p, 0, n); + return p; +} + +static char* +estrdup(char *s) +{ + char *d, *d0; + + if(!s) + return 0; + d = d0 = emalloc(strlen(s)+1); + while(*d++ = *s++) + ; + return d0; +} + + +/* + * Decode a[0..len] as a BER encoding of an ASN1 type. + * The return value is one of ASN_OK, etc. + * Depending on the error, the returned elem may or may not + * be nil. + */ +static int +decode(uchar* a, int alen, Elem* pelem) +{ + uchar* p = a; + + return ber_decode(&p, &a[alen], pelem); +} + +/* + * Like decode, but continue decoding after first element + * of array ends. + */ +static int +decode_seq(uchar* a, int alen, Elist** pelist) +{ + uchar* p = a; + + return seq_decode(&p, &a[alen], -1, 1, pelist); +} + +/* + * Decode the whole array as a BER encoding of an ASN1 value, + * (i.e., the part after the tag and length). + * Assume the value is encoded as universal tag "kind". + * The constr arg is 1 if the value is constructed, 0 if primitive. + * If there's an error, the return string will contain the error. + * Depending on the error, the returned value may or may not + * be nil. + */ +static int +decode_value(uchar* a, int alen, int kind, int isconstr, Value* pval) +{ + uchar* p = a; + + return value_decode(&p, &a[alen], alen, kind, isconstr, pval); +} + +/* + * All of the following decoding routines take arguments: + * uchar **pp; + * uchar *pend; + * Where parsing is supposed to start at **pp, and when parsing + * is done, *pp is updated to point at next char to be parsed. + * The pend pointer is just past end of string; an error should + * be returned parsing hasn't finished by then. + * + * The returned int is ASN_OK if all went fine, else ASN_ESHORT, etc. + * The remaining argument(s) are pointers to where parsed entity goes. + */ + +/* Decode an ASN1 'Elem' (tag, length, value) */ +static int +ber_decode(uchar** pp, uchar* pend, Elem* pelem) +{ + int err; + int isconstr; + int length; + Tag tag; + Value val; + + err = tag_decode(pp, pend, &tag, &isconstr); + if(err == ASN_OK) { + err = length_decode(pp, pend, &length); + if(err == ASN_OK) { + if(tag.class == Universal) + err = value_decode(pp, pend, length, tag.num, isconstr, &val); + else + err = value_decode(pp, pend, length, OCTET_STRING, 0, &val); + if(err == ASN_OK) { + pelem->tag = tag; + pelem->val = val; + } + } + } + return err; +} + +/* Decode a tag field */ +static int +tag_decode(uchar** pp, uchar* pend, Tag* ptag, int* pisconstr) +{ + int err; + int v; + uchar* p; + + err = ASN_OK; + p = *pp; + if(pend-p >= 2) { + v = *p++; + ptag->class = v&CLASS_MASK; + if(v&CONSTR_MASK) + *pisconstr = 1; + else + *pisconstr = 0; + v &= TAG_MASK; + if(v == TAG_MASK) + err = uint7_decode(&p, pend, &v); + ptag->num = v; + } + else + err = ASN_ESHORT; + *pp = p; + return err; +} + +/* Decode a length field */ +static int +length_decode(uchar** pp, uchar* pend, int* plength) +{ + int err; + int num; + int v; + uchar* p; + + err = ASN_OK; + num = 0; + p = *pp; + if(p < pend) { + v = *p++; + if(v&0x80) + err = int_decode(&p, pend, v&0x7F, 1, &num); + else + num = v; + } + else + err = ASN_ESHORT; + *pp = p; + *plength = num; + return err; +} + +/* Decode a value field */ +static int +value_decode(uchar** pp, uchar* pend, int length, int kind, int isconstr, Value* pval) +{ + int err; + Bytes* va; + int num; + int bitsunused; + int subids[MAXOBJIDLEN]; + int isubid; + Elist* vl; + uchar* p; + uchar* pe; + + err = ASN_OK; + p = *pp; + if(length == -1) { /* "indefinite" length spec */ + if(!isconstr) + err = ASN_EINVAL; + } + else if(p + length > pend) + err = ASN_EVALLEN; + if(err != ASN_OK) + return err; + + switch(kind) { + case 0: + /* marker for end of indefinite constructions */ + if(length == 0) + pval->tag = VNull; + else + err = ASN_EINVAL; + break; + + case BOOLEAN: + if(isconstr) + err = ASN_ECONSTR; + else if(length != 1) + err = ASN_EVALLEN; + else { + pval->tag = VBool; + pval->u.boolval = (*p++ != 0); + } + break; + + case INTEGER: + case ENUMERATED: + if(isconstr) + err = ASN_ECONSTR; + else if(length <= 4) { + err = int_decode(&p, pend, length, 0, &num); + if(err == ASN_OK) { + pval->tag = VInt; + pval->u.intval = num; + } + } + else { + pval->tag = VBigInt; + pval->u.bigintval = makebytes(p, length); + p += length; + } + break; + + case BIT_STRING: + pval->tag = VBitString; + if(isconstr) { + if(length == -1 && p + 2 <= pend && *p == 0 && *(p+1) ==0) { + pval->u.bitstringval = makebits(0, 0, 0); + p += 2; + } + else + /* TODO: recurse and concat results */ + err = ASN_EUNIMPL; + } + else { + if(length < 2) { + if(length == 1 && *p == 0) { + pval->u.bitstringval = makebits(0, 0, 0); + p++; + } + else + err = ASN_EINVAL; + } + else { + bitsunused = *p; + if(bitsunused > 7) + err = ASN_EINVAL; + else if(length > 0x0FFFFFFF) + err = ASN_ETOOBIG; + else { + pval->u.bitstringval = makebits(p+1, length-1, bitsunused); + p += length; + } + } + } + break; + + case OCTET_STRING: + case ObjectDescriptor: + err = octet_decode(&p, pend, length, isconstr, &va); + if(err == ASN_OK) { + pval->tag = VOctets; + pval->u.octetsval = va; + } + break; + + case NULLTAG: + if(isconstr) + err = ASN_ECONSTR; + else if(length != 0) + err = ASN_EVALLEN; + else + pval->tag = VNull; + break; + + case OBJECT_ID: + if(isconstr) + err = ASN_ECONSTR; + else if(length == 0) + err = ASN_EVALLEN; + else { + isubid = 0; + pe = p+length; + while(p < pe && isubid < MAXOBJIDLEN) { + err = uint7_decode(&p, pend, &num); + if(err != ASN_OK) + break; + if(isubid == 0) { + subids[isubid++] = num / 40; + subids[isubid++] = num % 40; + } + else + subids[isubid++] = num; + } + if(err == ASN_OK) { + if(p != pe) + err = ASN_EVALLEN; + else { + pval->tag = VObjId; + pval->u.objidval = makeints(subids, isubid); + } + } + } + break; + + case EXTERNAL: + case EMBEDDED_PDV: + /* TODO: parse this internally */ + if(p+length > pend) + err = ASN_EVALLEN; + else { + pval->tag = VOther; + pval->u.otherval = makebytes(p, length); + p += length; + } + break; + + case REAL: + /* Let the application decode */ + if(isconstr) + err = ASN_ECONSTR; + else if(p+length > pend) + err = ASN_EVALLEN; + else { + pval->tag = VReal; + pval->u.realval = makebytes(p, length); + p += length; + } + break; + + case SEQUENCE: + err = seq_decode(&p, pend, length, isconstr, &vl); + if(err == ASN_OK) { + pval->tag = VSeq ; + pval->u.seqval = vl; + } + break; + + case SETOF: + err = seq_decode(&p, pend, length, isconstr, &vl); + if(err == ASN_OK) { + pval->tag = VSet; + pval->u.setval = vl; + } + break; + + case NumericString: + case PrintableString: + case TeletexString: + case VideotexString: + case IA5String: + case UTCTime: + case GeneralizedTime: + case GraphicString: + case VisibleString: + case GeneralString: + case UniversalString: + case BMPString: + /* TODO: figure out when character set conversion is necessary */ + err = octet_decode(&p, pend, length, isconstr, &va); + if(err == ASN_OK) { + pval->tag = VString; + pval->u.stringval = (char*)emalloc(va->len+1); + memmove(pval->u.stringval, va->data, va->len); + pval->u.stringval[va->len] = 0; + free(va); + } + break; + + default: + if(p+length > pend) + err = ASN_EVALLEN; + else { + pval->tag = VOther; + pval->u.otherval = makebytes(p, length); + p += length; + } + break; + } + *pp = p; + return err; +} + +/* + * Decode an int in format where count bytes are + * concatenated to form value. + * Although ASN1 allows any size integer, we return + * an error if the result doesn't fit in a 32-bit int. + * If unsgned is not set, make sure to propagate sign bit. + */ +static int +int_decode(uchar** pp, uchar* pend, int count, int unsgned, int* pint) +{ + int err; + int num; + uchar* p; + + p = *pp; + err = ASN_OK; + num = 0; + if(p+count <= pend) { + if((count > 4) || (unsgned && count == 4 && (*p&0x80))) + err = ASN_ETOOBIG; + else { + if(!unsgned && count > 0 && count < 4 && (*p&0x80)) + num = -1; // set all bits, initially + while(count--) + num = (num << 8)|(*p++); + } + } + else + err = ASN_ESHORT; + *pint = num; + *pp = p; + return err; +} + +/* + * Decode an unsigned int in format where each + * byte except last has high bit set, and remaining + * seven bits of each byte are concatenated to form value. + * Although ASN1 allows any size integer, we return + * an error if the result doesn't fit in a 32 bit int. + */ +static int +uint7_decode(uchar** pp, uchar* pend, int* pint) +{ + int err; + int num; + int more; + int v; + uchar* p; + + p = *pp; + err = ASN_OK; + num = 0; + more = 1; + while(more && p < pend) { + v = *p++; + if(num&0x7F000000) { + err = ASN_ETOOBIG; + break; + } + num <<= 7; + more = v&0x80; + num |= (v&0x7F); + } + if(p == pend) + err = ASN_ESHORT; + *pint = num; + *pp = p; + return err; +} + +/* + * Decode an octet string, recursively if isconstr. + * We've already checked that length==-1 implies isconstr==1, + * and otherwise that specified length fits within (*pp..pend) + */ +static int +octet_decode(uchar** pp, uchar* pend, int length, int isconstr, Bytes** pbytes) +{ + int err; + uchar* p; + Bytes* ans; + Bytes* newans; + uchar* pstart; + uchar* pold; + Elem elem; + + err = ASN_OK; + p = *pp; + ans = nil; + if(length >= 0 && !isconstr) { + ans = makebytes(p, length); + p += length; + } + else { + /* constructed, either definite or indefinite length */ + pstart = p; + for(;;) { + if(length >= 0 && p >= pstart + length) { + if(p != pstart + length) + err = ASN_EVALLEN; + break; + } + pold = p; + err = ber_decode(&p, pend, &elem); + if(err != ASN_OK) + break; + switch(elem.val.tag) { + case VOctets: + newans = catbytes(ans, elem.val.u.octetsval); + freebytes(ans); + ans = newans; + break; + + case VEOC: + if(length != -1) { + p = pold; + err = ASN_EINVAL; + } + goto cloop_done; + + default: + p = pold; + err = ASN_EINVAL; + goto cloop_done; + } + } +cloop_done: + ; + } + *pp = p; + *pbytes = ans; + return err; +} + +/* + * Decode a sequence or set. + * We've already checked that length==-1 implies isconstr==1, + * and otherwise that specified length fits within (*p..pend) + */ +static int +seq_decode(uchar** pp, uchar* pend, int length, int isconstr, Elist** pelist) +{ + int err; + uchar* p; + uchar* pstart; + uchar* pold; + Elist* ans; + Elem elem; + Elist* lve; + Elist* lveold; + + err = ASN_OK; + ans = nil; + p = *pp; + if(!isconstr) + err = ASN_EPRIM; + else { + /* constructed, either definite or indefinite length */ + lve = nil; + pstart = p; + for(;;) { + if(length >= 0 && p >= pstart + length) { + if(p != pstart + length) + err = ASN_EVALLEN; + break; + } + pold = p; + err = ber_decode(&p, pend, &elem); + if(err != ASN_OK) + break; + if(elem.val.tag == VEOC) { + if(length != -1) { + p = pold; + err = ASN_EINVAL; + } + break; + } + else + lve = mkel(elem, lve); + } + if(err == ASN_OK) { + /* reverse back to original order */ + while(lve != nil) { + lveold = lve; + lve = lve->tl; + lveold->tl = ans; + ans = lveold; + } + } + } + *pp = p; + *pelist = ans; + return err; +} + +/* + * Encode e by BER rules, putting answer in *pbytes. + * This is done by first calling enc with lenonly==1 + * to get the length of the needed buffer, + * then allocating the buffer and using enc again to fill it up. + */ +static int +encode(Elem e, Bytes** pbytes) +{ + uchar* p; + Bytes* ans; + int err; + uchar uc; + + p = &uc; + err = enc(&p, e, 1); + if(err == ASN_OK) { + ans = newbytes(p-&uc); + p = ans->data; + err = enc(&p, e, 0); + *pbytes = ans; + } + return err; +} + +/* + * The various enc functions take a pointer to a pointer + * into a buffer, and encode their entity starting there, + * updating the pointer afterwards. + * If lenonly is 1, only the pointer update is done, + * allowing enc to be called first to calculate the needed + * buffer length. + * If lenonly is 0, it is assumed that the answer will fit. + */ + +static int +enc(uchar** pp, Elem e, int lenonly) +{ + int err; + int vlen; + int constr; + Tag tag; + int v; + int ilen; + uchar* p; + uchar* psave; + + p = *pp; + err = val_enc(&p, e, &constr, 1); + if(err != ASN_OK) + return err; + vlen = p - *pp; + p = *pp; + tag = e.tag; + v = tag.class|constr; + if(tag.num < 31) { + if(!lenonly) + *p = (v|tag.num); + p++; + } + else { + if(!lenonly) + *p = (v|31); + p++; + if(tag.num < 0) + return ASN_EINVAL; + uint7_enc(&p, tag.num, lenonly); + } + if(vlen < 0x80) { + if(!lenonly) + *p = vlen; + p++; + } + else { + psave = p; + int_enc(&p, vlen, 1, 1); + ilen = p-psave; + p = psave; + if(!lenonly) { + *p++ = (0x80 | ilen); + int_enc(&p, vlen, 1, 0); + } + else + p += 1 + ilen; + } + if(!lenonly) + val_enc(&p, e, &constr, 0); + else + p += vlen; + *pp = p; + return err; +} + +static int +val_enc(uchar** pp, Elem e, int *pconstr, int lenonly) +{ + int err; + uchar* p; + int kind; + int cl; + int v; + Bytes* bb = nil; + Bits* bits; + Ints* oid; + int k; + Elist* el; + char* s; + + p = *pp; + err = ASN_OK; + kind = e.tag.num; + cl = e.tag.class; + *pconstr = 0; + if(cl != Universal) { + switch(e.val.tag) { + case VBool: + kind = BOOLEAN; + break; + case VInt: + kind = INTEGER; + break; + case VBigInt: + kind = INTEGER; + break; + case VOctets: + kind = OCTET_STRING; + break; + case VReal: + kind = REAL; + break; + case VOther: + kind = OCTET_STRING; + break; + case VBitString: + kind = BIT_STRING; + break; + case VNull: + kind = NULLTAG; + break; + case VObjId: + kind = OBJECT_ID; + break; + case VString: + kind = UniversalString; + break; + case VSeq: + kind = SEQUENCE; + break; + case VSet: + kind = SETOF; + break; + } + } + switch(kind) { + case BOOLEAN: + if(is_int(&e, &v)) { + if(v != 0) + v = 255; + int_enc(&p, v, 1, lenonly); + } + else + err = ASN_EINVAL; + break; + + case INTEGER: + case ENUMERATED: + if(is_int(&e, &v)) + int_enc(&p, v, 0, lenonly); + else { + if(is_bigint(&e, &bb)) { + if(!lenonly) + memmove(p, bb->data, bb->len); + p += bb->len; + } + else + err = ASN_EINVAL; + } + break; + + case BIT_STRING: + if(is_bitstring(&e, &bits)) { + if(bits->len == 0) { + if(!lenonly) + *p = 0; + p++; + } + else { + v = bits->unusedbits; + if(v < 0 || v > 7) + err = ASN_EINVAL; + else { + if(!lenonly) { + *p = v; + memmove(p+1, bits->data, bits->len); + } + p += 1 + bits->len; + } + } + } + else + err = ASN_EINVAL; + break; + + case OCTET_STRING: + case ObjectDescriptor: + case EXTERNAL: + case REAL: + case EMBEDDED_PDV: + bb = nil; + switch(e.val.tag) { + case VOctets: + bb = e.val.u.octetsval; + break; + case VReal: + bb = e.val.u.realval; + break; + case VOther: + bb = e.val.u.otherval; + break; + } + if(bb != nil) { + if(!lenonly) + memmove(p, bb->data, bb->len); + p += bb->len; + } + else + err = ASN_EINVAL; + break; + + case NULLTAG: + break; + + case OBJECT_ID: + if(is_oid(&e, &oid)) { + for(k = 0; k < oid->len; k++) { + v = oid->data[k]; + if(k == 0) { + v *= 40; + if(oid->len > 1) + v += oid->data[++k]; + } + uint7_enc(&p, v, lenonly); + } + } + else + err = ASN_EINVAL; + break; + + case SEQUENCE: + case SETOF: + el = nil; + if(e.val.tag == VSeq) + el = e.val.u.seqval; + else if(e.val.tag == VSet) + el = e.val.u.setval; + else + err = ASN_EINVAL; + if(el != nil) { + *pconstr = CONSTR_MASK; + for(; el != nil; el = el->tl) { + err = enc(&p, el->hd, lenonly); + if(err != ASN_OK) + break; + } + } + break; + + case NumericString: + case PrintableString: + case TeletexString: + case VideotexString: + case IA5String: + case UTCTime: + case GeneralizedTime: + case GraphicString: + case VisibleString: + case GeneralString: + case UniversalString: + case BMPString: + if(e.val.tag == VString) { + s = e.val.u.stringval; + if(s != nil) { + v = strlen(s); + if(!lenonly) + memmove(p, s, v); + p += v; + } + } + else + err = ASN_EINVAL; + break; + + default: + err = ASN_EINVAL; + } + *pp = p; + return err; +} + +/* + * Encode num as unsigned 7 bit values with top bit 1 on all bytes + * except last, only putting in bytes if !lenonly. + */ +static void +uint7_enc(uchar** pp, int num, int lenonly) +{ + int n; + int v; + int k; + uchar* p; + + p = *pp; + n = 1; + v = num >> 7; + while(v > 0) { + v >>= 7; + n++; + } + if(lenonly) + p += n; + else { + for(k = (n - 1)*7; k > 0; k -= 7) + *p++= ((num >> k)|0x80); + *p++ = (num&0x7F); + } + *pp = p; +} + +/* + * Encode num as unsigned or signed integer, + * only putting in bytes if !lenonly. + * Encoding is length followed by bytes to concatenate. + */ +static void +int_enc(uchar** pp, int num, int unsgned, int lenonly) +{ + int v; + int n; + int prevv; + int k; + uchar* p; + + p = *pp; + v = num; + if(v < 0) + v = -(v + 1); + n = 1; + prevv = v; + v >>= 8; + while(v > 0) { + prevv = v; + v >>= 8; + n++; + } + if(!unsgned && (prevv&0x80)) + n++; + if(lenonly) + p += n; + else { + for(k = (n - 1)*8; k >= 0; k -= 8) + *p++ = (num >> k); + } + *pp = p; +} + +static int +ints_eq(Ints* a, Ints* b) +{ + int alen; + int i; + + alen = a->len; + if(alen != b->len) + return 0; + for(i = 0; i < alen; i++) + if(a->data[i] != b->data[i]) + return 0; + return 1; +} + +/* + * Look up o in tab (which must have nil entry to terminate). + * Return index of matching entry, or -1 if none. + */ +static int +oid_lookup(Ints* o, Ints** tab) +{ + int i; + + for(i = 0; tab[i] != nil; i++) + if(ints_eq(o, tab[i])) + return i; + return -1; +} + +/* + * Return true if *pe is a SEQUENCE, and set *pseq to + * the value of the sequence if so. + */ +static int +is_seq(Elem* pe, Elist** pseq) +{ + if(pe->tag.class == Universal && pe->tag.num == SEQUENCE && pe->val.tag == VSeq) { + *pseq = pe->val.u.seqval; + return 1; + } + return 0; +} + +static int +is_set(Elem* pe, Elist** pset) +{ + if(pe->tag.class == Universal && pe->tag.num == SETOF && pe->val.tag == VSet) { + *pset = pe->val.u.setval; + return 1; + } + return 0; +} + +static int +is_int(Elem* pe, int* pint) +{ + if(pe->tag.class == Universal) { + if(pe->tag.num == INTEGER && pe->val.tag == VInt) { + *pint = pe->val.u.intval; + return 1; + } + else if(pe->tag.num == BOOLEAN && pe->val.tag == VBool) { + *pint = pe->val.u.boolval; + return 1; + } + } + return 0; +} + +/* + * for convience, all VInt's are readable via this routine, + * as well as all VBigInt's + */ +static int +is_bigint(Elem* pe, Bytes** pbigint) +{ + int v, n, i; + + if(pe->tag.class == Universal && pe->tag.num == INTEGER) { + if(pe->val.tag == VBigInt) + *pbigint = pe->val.u.bigintval; + else if(pe->val.tag == VInt){ + v = pe->val.u.intval; + for(n = 1; n < 4; n++) + if((1 << (8 * n)) > v) + break; + *pbigint = newbytes(n); + for(i = 0; i < n; i++) + (*pbigint)->data[i] = (v >> ((n - 1 - i) * 8)); + }else + return 0; + return 1; + } + return 0; +} + +static int +is_bitstring(Elem* pe, Bits** pbits) +{ + if(pe->tag.class == Universal && pe->tag.num == BIT_STRING && pe->val.tag == VBitString) { + *pbits = pe->val.u.bitstringval; + return 1; + } + return 0; +} + +static int +is_octetstring(Elem* pe, Bytes** poctets) +{ + if(pe->tag.class == Universal && pe->tag.num == OCTET_STRING && pe->val.tag == VOctets) { + *poctets = pe->val.u.octetsval; + return 1; + } + return 0; +} + +static int +is_oid(Elem* pe, Ints** poid) +{ + if(pe->tag.class == Universal && pe->tag.num == OBJECT_ID && pe->val.tag == VObjId) { + *poid = pe->val.u.objidval; + return 1; + } + return 0; +} + +static int +is_string(Elem* pe, char** pstring) +{ + if(pe->tag.class == Universal) { + switch(pe->tag.num) { + case NumericString: + case PrintableString: + case TeletexString: + case VideotexString: + case IA5String: + case GraphicString: + case VisibleString: + case GeneralString: + case UniversalString: + case BMPString: + if(pe->val.tag == VString) { + *pstring = pe->val.u.stringval; + return 1; + } + } + } + return 0; +} + +static int +is_time(Elem* pe, char** ptime) +{ + if(pe->tag.class == Universal + && (pe->tag.num == UTCTime || pe->tag.num == GeneralizedTime) + && pe->val.tag == VString) { + *ptime = pe->val.u.stringval; + return 1; + } + return 0; +} + + +/* + * malloc and return a new Bytes structure capable of + * holding len bytes. (len >= 0) + */ +static Bytes* +newbytes(int len) +{ + Bytes* ans; + + ans = (Bytes*)emalloc(OFFSETOF(data[0], Bytes) + len); + ans->len = len; + return ans; +} + +/* + * newbytes(len), with data initialized from buf + */ +static Bytes* +makebytes(uchar* buf, int len) +{ + Bytes* ans; + + ans = newbytes(len); + memmove(ans->data, buf, len); + return ans; +} + +static void +freebytes(Bytes* b) +{ + if(b != nil) + free(b); +} + +/* + * Make a new Bytes, containing bytes of b1 followed by those of b2. + * Either b1 or b2 or both can be nil. + */ +static Bytes* +catbytes(Bytes* b1, Bytes* b2) +{ + Bytes* ans; + int n; + + if(b1 == nil) { + if(b2 == nil) + ans = newbytes(0); + else + ans = makebytes(b2->data, b2->len); + } + else if(b2 == nil) { + ans = makebytes(b1->data, b1->len); + } + else { + n = b1->len + b2->len; + ans = newbytes(n); + ans->len = n; + memmove(ans->data, b1->data, b1->len); + memmove(ans->data+b1->len, b2->data, b2->len); + } + return ans; +} + +/* len is number of ints */ +static Ints* +newints(int len) +{ + Ints* ans; + + ans = (Ints*)emalloc(OFFSETOF(data[0], Ints) + len*sizeof(int)); + ans->len = len; + return ans; +} + +static Ints* +makeints(int* buf, int len) +{ + Ints* ans; + + ans = newints(len); + if(len > 0) + memmove(ans->data, buf, len*sizeof(int)); + return ans; +} + +static void +freeints(Ints* b) +{ + if(b != nil) + free(b); +} + +/* len is number of bytes */ +static Bits* +newbits(int len) +{ + Bits* ans; + + ans = (Bits*)emalloc(OFFSETOF(data[0], Bits) + len); + ans->len = len; + ans->unusedbits = 0; + return ans; +} + +static Bits* +makebits(uchar* buf, int len, int unusedbits) +{ + Bits* ans; + + ans = newbits(len); + memmove(ans->data, buf, len); + ans->unusedbits = unusedbits; + return ans; +} + +static void +freebits(Bits* b) +{ + if(b != nil) + free(b); +} + +static Elist* +mkel(Elem e, Elist* tail) +{ + Elist* el; + + el = (Elist*)emalloc(sizeof(Elist)); + el->hd = e; + el->tl = tail; + return el; +} + +static int +elistlen(Elist* el) +{ + int ans = 0; + while(el != nil) { + ans++; + el = el->tl; + } + return ans; +} + +/* Frees elist, but not fields inside values of constituent elems */ +static void +freeelist(Elist* el) +{ + Elist* next; + + while(el != nil) { + next = el->tl; + free(el); + el = next; + } +} + +/* free any allocated structures inside v (recursively freeing Elists) */ +static void +freevalfields(Value* v) +{ + Elist* el; + Elist* l; + if(v == nil) + return; + switch(v->tag) { + case VOctets: + freebytes(v->u.octetsval); + break; + case VBigInt: + freebytes(v->u.bigintval); + break; + case VReal: + freebytes(v->u.realval); + break; + case VOther: + freebytes(v->u.otherval); + break; + case VBitString: + freebits(v->u.bitstringval); + break; + case VObjId: + freeints(v->u.objidval); + break; + case VString: + if (v->u.stringval) + free(v->u.stringval); + break; + case VSeq: + el = v->u.seqval; + for(l = el; l != nil; l = l->tl) + freevalfields(&l->hd.val); + if (el) + freeelist(el); + break; + case VSet: + el = v->u.setval; + for(l = el; l != nil; l = l->tl) + freevalfields(&l->hd.val); + if (el) + freeelist(el); + break; + } +} + +/* end of general ASN1 functions */ + + + + + +/*=============================================================*/ +/* + * Decode and parse an X.509 Certificate, defined by this ASN1: + * Certificate ::= SEQUENCE { + * certificateInfo CertificateInfo, + * signatureAlgorithm AlgorithmIdentifier, + * signature BIT STRING } + * + * CertificateInfo ::= SEQUENCE { + * version [0] INTEGER DEFAULT v1 (0), + * serialNumber INTEGER, + * signature AlgorithmIdentifier, + * issuer Name, + * validity Validity, + * subject Name, + * subjectPublicKeyInfo SubjectPublicKeyInfo } + * (version v2 has two more fields, optional unique identifiers for + * issuer and subject; since we ignore these anyway, we won't parse them) + * + * Validity ::= SEQUENCE { + * notBefore UTCTime, + * notAfter UTCTime } + * + * SubjectPublicKeyInfo ::= SEQUENCE { + * algorithm AlgorithmIdentifier, + * subjectPublicKey BIT STRING } + * + * AlgorithmIdentifier ::= SEQUENCE { + * algorithm OBJECT IDENTIFER, + * parameters ANY DEFINED BY ALGORITHM OPTIONAL } + * + * Name ::= SEQUENCE OF RelativeDistinguishedName + * + * RelativeDistinguishedName ::= SETOF SIZE(1..MAX) OF AttributeTypeAndValue + * + * AttributeTypeAndValue ::= SEQUENCE { + * type OBJECT IDENTIFER, + * value DirectoryString } + * (selected attributes have these Object Ids: + * commonName {2 5 4 3} + * countryName {2 5 4 6} + * localityName {2 5 4 7} + * stateOrProvinceName {2 5 4 8} + * organizationName {2 5 4 10} + * organizationalUnitName {2 5 4 11} + * ) + * + * DirectoryString ::= CHOICE { + * teletexString TeletexString, + * printableString PrintableString, + * universalString UniversalString } + * + * See rfc1423, rfc2437 for AlgorithmIdentifier, subjectPublicKeyInfo, signature. + * + * Not yet implemented: + * CertificateRevocationList ::= SIGNED SEQUENCE{ + * signature AlgorithmIdentifier, + * issuer Name, + * lastUpdate UTCTime, + * nextUpdate UTCTime, + * revokedCertificates + * SEQUENCE OF CRLEntry OPTIONAL} + * CRLEntry ::= SEQUENCE{ + * userCertificate SerialNumber, + * revocationDate UTCTime} + */ + +typedef struct CertX509 { + int serial; + char* issuer; + char* validity_start; + char* validity_end; + char* subject; + int publickey_alg; + Bytes* publickey; + int signature_alg; + Bytes* signature; +} CertX509; + +/* Algorithm object-ids */ +enum { + ALG_rsaEncryption, + ALG_md2WithRSAEncryption, + ALG_md4WithRSAEncryption, + ALG_md5WithRSAEncryption, + ALG_sha1WithRSAEncryption, + ALG_md5, + NUMALGS +}; +typedef struct Ints7 { + int len; + int data[7]; +} Ints7; +static Ints7 oid_rsaEncryption = {7, 1, 2, 840, 113549, 1, 1, 1 }; +static Ints7 oid_md2WithRSAEncryption = {7, 1, 2, 840, 113549, 1, 1, 2 }; +static Ints7 oid_md4WithRSAEncryption = {7, 1, 2, 840, 113549, 1, 1, 3 }; +static Ints7 oid_md5WithRSAEncryption = {7, 1, 2, 840, 113549, 1, 1, 4 }; +static Ints7 oid_sha1WithRSAEncryption ={7, 1, 2, 840, 113549, 1, 1, 5 }; +static Ints7 oid_md5 ={6, 1, 2, 840, 113549, 2, 5, 0 }; +static Ints *alg_oid_tab[NUMALGS+1] = { + (Ints*)&oid_rsaEncryption, + (Ints*)&oid_md2WithRSAEncryption, + (Ints*)&oid_md4WithRSAEncryption, + (Ints*)&oid_md5WithRSAEncryption, + (Ints*)&oid_sha1WithRSAEncryption, + (Ints*)&oid_md5, + nil +}; +static DigestFun digestalg[NUMALGS+1] = { md5, md5, md5, md5, sha1, md5, nil }; + +static void +freecert(CertX509* c) +{ + if (!c) return; + if(c->issuer != nil) + free(c->issuer); + if(c->validity_start != nil) + free(c->validity_start); + if(c->validity_end != nil) + free(c->validity_end); + if(c->subject != nil) + free(c->subject); + freebytes(c->publickey); + freebytes(c->signature); +} + +/* + * Parse the Name ASN1 type. + * The sequence of RelativeDistinguishedName's gives a sort of pathname, + * from most general to most specific. Each element of the path can be + * one or more (but usually just one) attribute-value pair, such as + * countryName="US". + * We'll just form a "postal-style" address string by concatenating the elements + * from most specific to least specific, separated by commas. + * Return name-as-string (which must be freed by caller). + */ +static char* +parse_name(Elem* e) +{ + Elist* el; + Elem* es; + Elist* esetl; + Elem* eat; + Elist* eatl; + char* s; + enum { MAXPARTS = 100 }; + char* parts[MAXPARTS]; + int i; + int plen; + char* ans = nil; + + if(!is_seq(e, &el)) + goto errret; + i = 0; + plen = 0; + while(el != nil) { + es = &el->hd; + if(!is_set(es, &esetl)) + goto errret; + while(esetl != nil) { + eat = &esetl->hd; + if(!is_seq(eat, &eatl) || elistlen(eatl) != 2) + goto errret; + if(!is_string(&eatl->tl->hd, &s) || i>=MAXPARTS) + goto errret; + parts[i++] = s; + plen += strlen(s) + 2; /* room for ", " after */ + esetl = esetl->tl; + } + el = el->tl; + } + if(i > 0) { + ans = (char*)emalloc(plen); + *ans = '\0'; + while(--i >= 0) { + s = parts[i]; + strcat(ans, s); + if(i > 0) + strcat(ans, ", "); + } + } + +errret: + return ans; +} + +/* + * Parse an AlgorithmIdentifer ASN1 type. + * Look up the oid in oid_tab and return one of OID_rsaEncryption, etc.., + * or -1 if not found. + * For now, ignore parameters, since none of our algorithms need them. + */ +static int +parse_alg(Elem* e) +{ + Elist* el; + Ints* oid; + + if(!is_seq(e, &el) || el == nil || !is_oid(&el->hd, &oid)) + return -1; + return oid_lookup(oid, alg_oid_tab); +} + +static CertX509* +decode_cert(Bytes* a) +{ + int ok = 0; + int n; + CertX509* c = nil; + Elem ecert; + Elem* ecertinfo; + Elem* esigalg; + Elem* esig; + Elem* eserial; + Elem* eissuer; + Elem* evalidity; + Elem* esubj; + Elem* epubkey; + Elist* el; + Elist* elcert = nil; + Elist* elcertinfo = nil; + Elist* elvalidity = nil; + Elist* elpubkey = nil; + Bits* bits = nil; + Bytes* b; + Elem* e; + + if(decode(a->data, a->len, &ecert) != ASN_OK) + goto errret; + + c = (CertX509*)emalloc(sizeof(CertX509)); + c->serial = -1; + c->issuer = nil; + c->validity_start = nil; + c->validity_end = nil; + c->subject = nil; + c->publickey_alg = -1; + c->publickey = nil; + c->signature_alg = -1; + c->signature = nil; + + /* Certificate */ + if(!is_seq(&ecert, &elcert) || elistlen(elcert) !=3) + goto errret; + ecertinfo = &elcert->hd; + el = elcert->tl; + esigalg = &el->hd; + c->signature_alg = parse_alg(esigalg); + el = el->tl; + esig = &el->hd; + + /* Certificate Info */ + if(!is_seq(ecertinfo, &elcertinfo)) + goto errret; + n = elistlen(elcertinfo); + if(n < 6) + goto errret; + eserial =&elcertinfo->hd; + el = elcertinfo->tl; + /* check for optional version, marked by explicit context tag 0 */ + if(eserial->tag.class == Context && eserial->tag.num == 0) { + eserial = &el->hd; + if(n < 7) + goto errret; + el = el->tl; + } + + if(parse_alg(&el->hd) != c->signature_alg) + goto errret; + el = el->tl; + eissuer = &el->hd; + el = el->tl; + evalidity = &el->hd; + el = el->tl; + esubj = &el->hd; + el = el->tl; + epubkey = &el->hd; + if(!is_int(eserial, &c->serial)) { + if(!is_bigint(eserial, &b)) + goto errret; + c->serial = -1; /* else we have to change cert struct */ + } + c->issuer = parse_name(eissuer); + if(c->issuer == nil) + goto errret; + /* Validity */ + if(!is_seq(evalidity, &elvalidity)) + goto errret; + if(elistlen(elvalidity) != 2) + goto errret; + e = &elvalidity->hd; + if(!is_time(e, &c->validity_start)) + goto errret; + e->val.u.stringval = nil; /* string ownership transfer */ + e = &elvalidity->tl->hd; + if(!is_time(e, &c->validity_end)) + goto errret; + e->val.u.stringval = nil; /* string ownership transfer */ + + /* resume CertificateInfo */ + c->subject = parse_name(esubj); + if(c->subject == nil) + goto errret; + + /* SubjectPublicKeyInfo */ + if(!is_seq(epubkey, &elpubkey)) + goto errret; + if(elistlen(elpubkey) != 2) + goto errret; + + c->publickey_alg = parse_alg(&elpubkey->hd); + if(c->publickey_alg < 0) + goto errret; + if(!is_bitstring(&elpubkey->tl->hd, &bits)) + goto errret; + if(bits->unusedbits != 0) + goto errret; + c->publickey = makebytes(bits->data, bits->len); + + /*resume Certificate */ + if(c->signature_alg < 0) + goto errret; + if(!is_bitstring(esig, &bits)) + goto errret; + c->signature = makebytes(bits->data, bits->len); + ok = 1; + +errret: + freevalfields(&ecert.val); /* recurses through lists, too */ + if(!ok){ + freecert(c); + c = nil; + } + return c; +} + +/* + * RSAPublickKey :: SEQUENCE { + * modulus INTEGER, + * publicExponent INTEGER + * } + */ +static RSApub* +decode_rsapubkey(Bytes* a) +{ + Elem e; + Elist *el; + mpint *mp; + RSApub* key; + + key = rsapuballoc(); + if(decode(a->data, a->len, &e) != ASN_OK) + goto errret; + if(!is_seq(&e, &el) || elistlen(el) != 2) + goto errret; + + key->n = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->ek = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + return key; +errret: + rsapubfree(key); + return nil; +} + +/* + * RSAPrivateKey ::= SEQUENCE { + * version Version, + * modulus INTEGER, -- n + * publicExponent INTEGER, -- e + * privateExponent INTEGER, -- d + * prime1 INTEGER, -- p + * prime2 INTEGER, -- q + * exponent1 INTEGER, -- d mod (p-1) + * exponent2 INTEGER, -- d mod (q-1) + * coefficient INTEGER -- (inverse of q) mod p } + */ +static RSApriv* +decode_rsaprivkey(Bytes* a) +{ + int version; + Elem e; + Elist *el; + mpint *mp; + RSApriv* key; + + key = rsaprivalloc(); + if(decode(a->data, a->len, &e) != ASN_OK) + goto errret; + if(!is_seq(&e, &el) || elistlen(el) != 9) + goto errret; + if(!is_int(&el->hd, &version) || version != 0) + goto errret; + + el = el->tl; + key->pub.n = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->pub.ek = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->dk = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->q = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->p = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->kq = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->kp = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + el = el->tl; + key->c2 = mp = asn1mpint(&el->hd); + if(mp == nil) + goto errret; + + return key; +errret: + rsaprivfree(key); + return nil; +} + +static mpint* +asn1mpint(Elem *e) +{ + Bytes *b; + mpint *mp; + int v; + + if(is_int(e, &v)) + return itomp(v, nil); + if(is_bigint(e, &b)) { + mp = betomp(b->data, b->len, nil); + freebytes(b); + return mp; + } + return nil; +} + +static mpint* +pkcs1pad(Bytes *b, mpint *modulus) +{ + int n = (mpsignif(modulus)+7)/8; + int pm1, i; + uchar *p; + mpint *mp; + + pm1 = n - 1 - b->len; + p = (uchar*)emalloc(n); + p[0] = 0; + p[1] = 1; + for(i = 2; i < pm1; i++) + p[i] = 0xFF; + p[pm1] = 0; + memcpy(&p[pm1+1], b->data, b->len); + mp = betomp(p, n, nil); + free(p); + return mp; +} + +RSApriv* +asn1toRSApriv(uchar *kd, int kn) +{ + Bytes *b; + RSApriv *key; + + b = makebytes(kd, kn); + key = decode_rsaprivkey(b); + freebytes(b); + return key; +} + +/* + * digest(CertificateInfo) + * Our ASN.1 library doesn't return pointers into the original + * data array, so we need to do a little hand decoding. + */ +static void +digest_certinfo(Bytes *cert, DigestFun digestfun, uchar *digest) +{ + uchar *info, *p, *pend; + ulong infolen; + int isconstr, length; + Tag tag; + Elem elem; + + p = cert->data; + pend = cert->data + cert->len; + if(tag_decode(&p, pend, &tag, &isconstr) != ASN_OK || + tag.class != Universal || tag.num != SEQUENCE || + length_decode(&p, pend, &length) != ASN_OK || + p+length > pend || + p+length < p) + return; + info = p; + if(ber_decode(&p, pend, &elem) != ASN_OK || elem.tag.num != SEQUENCE) + return; + infolen = p - info; + (*digestfun)(info, infolen, digest, nil); +} + +static char* +verify_signature(Bytes* signature, RSApub *pk, uchar *edigest, Elem **psigalg) +{ + Elem e; + Elist *el; + Bytes *digest; + uchar *pkcs1buf, *buf; + int buflen; + mpint *pkcs1; + int nlen; + + /* one less than the byte length of the modulus */ + nlen = (mpsignif(pk->n)-1)/8; + + /* see 9.2.1 of rfc2437 */ + pkcs1 = betomp(signature->data, signature->len, nil); + mpexp(pkcs1, pk->ek, pk->n, pkcs1); + pkcs1buf = nil; + buflen = mptobe(pkcs1, nil, 0, &pkcs1buf); + buf = pkcs1buf; + if(buflen != nlen || buf[0] != 1) + return "expected 1"; + buf++; + while(buf[0] == 0xff) + buf++; + if(buf[0] != 0) + return "expected 0"; + buf++; + buflen -= buf-pkcs1buf; + if(decode(buf, buflen, &e) != ASN_OK || !is_seq(&e, &el) || elistlen(el) != 2 || + !is_octetstring(&el->tl->hd, &digest)) + return "signature parse error"; + *psigalg = &el->hd; + if(memcmp(digest->data, edigest, digest->len) == 0) + return nil; + return "digests did not match"; +} + +RSApub* +X509toRSApub(uchar *cert, int ncert, char *name, int nname) +{ + char *e; + Bytes *b; + CertX509 *c; + RSApub *pk; + + b = makebytes(cert, ncert); + c = decode_cert(b); + freebytes(b); + if(c == nil) + return nil; + if(name != nil && c->subject != nil){ + e = strchr(c->subject, ','); + if(e != nil) + *e = 0; // take just CN part of Distinguished Name + strncpy(name, c->subject, nname); + } + pk = decode_rsapubkey(c->publickey); + freecert(c); + return pk; +} + +char* +X509verify(uchar *cert, int ncert, RSApub *pk) +{ + char *e; + Bytes *b; + CertX509 *c; + uchar digest[SHA1dlen]; + Elem *sigalg; + + b = makebytes(cert, ncert); + c = decode_cert(b); + if(c != nil) + digest_certinfo(b, digestalg[c->signature_alg], digest); + freebytes(b); + if(c == nil) + return "cannot decode cert"; + e = verify_signature(c->signature, pk, digest, &sigalg); + freecert(c); + return e; +} + +/* ------- Elem constructors ---------- */ +static Elem +Null(void) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = NULLTAG; + e.val.tag = VNull; + return e; +} + +static Elem +mkint(int j) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = INTEGER; + e.val.tag = VInt; + e.val.u.intval = j; + return e; +} + +static Elem +mkbigint(mpint *p) +{ + Elem e; + uchar *buf; + int buflen; + + e.tag.class = Universal; + e.tag.num = INTEGER; + e.val.tag = VBigInt; + buflen = mptobe(p, nil, 0, &buf); + e.val.u.bigintval = makebytes(buf, buflen); + free(buf); + return e; +} + +static Elem +mkstring(char *s) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = IA5String; + e.val.tag = VString; + e.val.u.stringval = estrdup(s); + return e; +} + +static Elem +mkoctet(uchar *buf, int buflen) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = OCTET_STRING; + e.val.tag = VOctets; + e.val.u.octetsval = makebytes(buf, buflen); + return e; +} + +static Elem +mkbits(uchar *buf, int buflen) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = BIT_STRING; + e.val.tag = VBitString; + e.val.u.bitstringval = makebits(buf, buflen, 0); + return e; +} + +static Elem +mkutc(long t) +{ + Elem e; + char utc[50]; + Tm *tm = gmtime(t); + + e.tag.class = Universal; + e.tag.num = UTCTime; + e.val.tag = VString; + snprint(utc, 50, "%.2d%.2d%.2d%.2d%.2d%.2dZ", + tm->year % 100, tm->mon+1, tm->mday, tm->hour, tm->min, tm->sec); + e.val.u.stringval = estrdup(utc); + return e; +} + +static Elem +mkoid(Ints *oid) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = OBJECT_ID; + e.val.tag = VObjId; + e.val.u.objidval = makeints(oid->data, oid->len); + return e; +} + +static Elem +mkseq(Elist *el) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = SEQUENCE; + e.val.tag = VSeq; + e.val.u.seqval = el; + return e; +} + +static Elem +mkset(Elist *el) +{ + Elem e; + + e.tag.class = Universal; + e.tag.num = SETOF; + e.val.tag = VSet; + e.val.u.setval = el; + return e; +} + +static Elem +mkalg(int alg) +{ + return mkseq(mkel(mkoid(alg_oid_tab[alg]), mkel(Null(), nil))); +} + +typedef struct Ints7pref { + int len; + int data[7]; + char prefix[4]; +} Ints7pref; +Ints7pref DN_oid[] = { + {4, 2, 5, 4, 6, 0, 0, 0, "C="}, + {4, 2, 5, 4, 8, 0, 0, 0, "ST="}, + {4, 2, 5, 4, 7, 0, 0, 0, "L="}, + {4, 2, 5, 4, 10, 0, 0, 0, "O="}, + {4, 2, 5, 4, 11, 0, 0, 0, "OU="}, + {4, 2, 5, 4, 3, 0, 0, 0, "CN="}, + {7, 1,2,840,113549,1,9,1, "E="}, +}; + +static Elem +mkname(Ints7pref *oid, char *subj) +{ + return mkset(mkel(mkseq(mkel(mkoid((Ints*)oid), mkel(mkstring(subj), nil))), nil)); +} + +static Elem +mkDN(char *dn) +{ + int i, j, nf; + char *f[20], *prefix, *d2 = estrdup(dn); + Elist* el = nil; + + nf = tokenize(d2, f, nelem(f)); + for(i=nf-1; i>=0; i--){ + for(j=0; jn),mkel(mkint(mptoi(pk->ek)),nil))); + if(encode(pubkey, &pkbytes) != ASN_OK) + goto errret; + freevalfields(&pubkey.val); + pubkey = mkseq( + mkel(mkalg(ALG_rsaEncryption), + mkel(mkbits(pkbytes->data, pkbytes->len), + nil))); + freebytes(pkbytes); + validity = mkseq( + mkel(mkutc(valid[0]), + mkel(mkutc(valid[1]), + nil))); + certinfo = mkseq( + mkel(mkint(serial), + mkel(mkalg(ALG_md5WithRSAEncryption), + mkel(issuer, + mkel(validity, + mkel(subject, + mkel(pubkey, + nil))))))); + if(encode(certinfo, &certinfobytes) != ASN_OK) + goto errret; + md5(certinfobytes->data, certinfobytes->len, digest, 0); + freebytes(certinfobytes); + sig = mkseq( + mkel(mkalg(ALG_md5), + mkel(mkoctet(digest, MD5dlen), + nil))); + if(encode(sig, &sigbytes) != ASN_OK) + goto errret; + pkcs1 = pkcs1pad(sigbytes, pk->n); + freebytes(sigbytes); + rsadecrypt(priv, pkcs1, pkcs1); + buflen = mptobe(pkcs1, nil, 0, &buf); + mpfree(pkcs1); + e = mkseq( + mkel(certinfo, + mkel(mkalg(ALG_md5WithRSAEncryption), + mkel(mkbits(buf, buflen), + nil)))); + free(buf); + if(encode(e, &certbytes) != ASN_OK) + goto errret; + if(certlen) + *certlen = certbytes->len; + cert = certbytes->data; +errret: + freevalfields(&e.val); + return cert; +} + +uchar* +X509req(RSApriv *priv, char *subj, int *certlen) +{ + /* RFC 2314, PKCS #10 Certification Request Syntax */ + int version = 0; + uchar *cert = nil; + RSApub *pk = rsaprivtopub(priv); + Bytes *certbytes, *pkbytes, *certinfobytes, *sigbytes; + Elem e, certinfo, subject, pubkey, sig; + uchar digest[MD5dlen], *buf; + int buflen; + mpint *pkcs1; + + e.val.tag = VInt; /* so freevalfields at errret is no-op */ + subject = mkDN(subj); + pubkey = mkseq(mkel(mkbigint(pk->n),mkel(mkint(mptoi(pk->ek)),nil))); + if(encode(pubkey, &pkbytes) != ASN_OK) + goto errret; + freevalfields(&pubkey.val); + pubkey = mkseq( + mkel(mkalg(ALG_rsaEncryption), + mkel(mkbits(pkbytes->data, pkbytes->len), + nil))); + freebytes(pkbytes); + certinfo = mkseq( + mkel(mkint(version), + mkel(subject, + mkel(pubkey, + nil)))); + if(encode(certinfo, &certinfobytes) != ASN_OK) + goto errret; + md5(certinfobytes->data, certinfobytes->len, digest, 0); + freebytes(certinfobytes); + sig = mkseq( + mkel(mkalg(ALG_md5), + mkel(mkoctet(digest, MD5dlen), + nil))); + if(encode(sig, &sigbytes) != ASN_OK) + goto errret; + pkcs1 = pkcs1pad(sigbytes, pk->n); + freebytes(sigbytes); + rsadecrypt(priv, pkcs1, pkcs1); + buflen = mptobe(pkcs1, nil, 0, &buf); + mpfree(pkcs1); + e = mkseq( + mkel(certinfo, + mkel(mkalg(ALG_md5), + mkel(mkbits(buf, buflen), + nil)))); + free(buf); + if(encode(e, &certbytes) != ASN_OK) + goto errret; + if(certlen) + *certlen = certbytes->len; + cert = certbytes->data; +errret: + freevalfields(&e.val); + return cert; +} + +static char* +tagdump(Tag tag) +{ + if(tag.class != Universal) + return smprint("class%d,num%d", tag.class, tag.num); + switch(tag.num){ + case BOOLEAN: return "BOOLEAN"; break; + case INTEGER: return "INTEGER"; break; + case BIT_STRING: return "BIT STRING"; break; + case OCTET_STRING: return "OCTET STRING"; break; + case NULLTAG: return "NULLTAG"; break; + case OBJECT_ID: return "OID"; break; + case ObjectDescriptor: return "OBJECT_DES"; break; + case EXTERNAL: return "EXTERNAL"; break; + case REAL: return "REAL"; break; + case ENUMERATED: return "ENUMERATED"; break; + case EMBEDDED_PDV: return "EMBEDDED PDV"; break; + case SEQUENCE: return "SEQUENCE"; break; + case SETOF: return "SETOF"; break; + case NumericString: return "NumericString"; break; + case PrintableString: return "PrintableString"; break; + case TeletexString: return "TeletexString"; break; + case VideotexString: return "VideotexString"; break; + case IA5String: return "IA5String"; break; + case UTCTime: return "UTCTime"; break; + case GeneralizedTime: return "GeneralizedTime"; break; + case GraphicString: return "GraphicString"; break; + case VisibleString: return "VisibleString"; break; + case GeneralString: return "GeneralString"; break; + case UniversalString: return "UniversalString"; break; + case BMPString: return "BMPString"; break; + default: + return smprint("Universal,num%d", tag.num); + } +} + +static void +edump(Elem e) +{ + Value v; + Elist *el; + int i; + + print("%s{", tagdump(e.tag)); + v = e.val; + switch(v.tag){ + case VBool: print("Bool %d",v.u.boolval); break; + case VInt: print("Int %d",v.u.intval); break; + case VOctets: print("Octets[%d] %.2x%.2x...",v.u.octetsval->len,v.u.octetsval->data[0],v.u.octetsval->data[1]); break; + case VBigInt: print("BigInt[%d] %.2x%.2x...",v.u.bigintval->len,v.u.bigintval->data[0],v.u.bigintval->data[1]); break; + case VReal: print("Real..."); break; + case VOther: print("Other..."); break; + case VBitString: print("BitString..."); break; + case VNull: print("Null"); break; + case VEOC: print("EOC..."); break; + case VObjId: print("ObjId"); + for(i = 0; ilen; i++) + print(" %d", v.u.objidval->data[i]); + break; + case VString: print("String \"%s\"",v.u.stringval); break; + case VSeq: print("Seq\n"); + for(el = v.u.seqval; el!=nil; el = el->tl) + edump(el->hd); + break; + case VSet: print("Set\n"); + for(el = v.u.setval; el!=nil; el = el->tl) + edump(el->hd); + break; + } + print("}\n"); +} + +void +asn1dump(uchar *der, int len) +{ + Elem e; + + if(decode(der, len, &e) != ASN_OK){ + print("didn't parse\n"); + exits("didn't parse"); + } + edump(e); +} + +void +X509dump(uchar *cert, int ncert) +{ + char *e; + Bytes *b; + CertX509 *c; + RSApub *pk; + uchar digest[SHA1dlen]; + Elem *sigalg; + + print("begin X509dump\n"); + b = makebytes(cert, ncert); + c = decode_cert(b); + if(c != nil) + digest_certinfo(b, digestalg[c->signature_alg], digest); + freebytes(b); + if(c == nil){ + print("cannot decode cert"); + return; + } + + print("serial %d\n", c->serial); + print("issuer %s\n", c->issuer); + print("validity %s %s\n", c->validity_start, c->validity_end); + print("subject %s\n", c->subject); + pk = decode_rsapubkey(c->publickey); + print("pubkey e=%B n(%d)=%B\n", pk->ek, mpsignif(pk->n), pk->n); + + print("sigalg=%d digest=%.*H\n", c->signature_alg, MD5dlen, digest); + e = verify_signature(c->signature, pk, digest, &sigalg); + if(e==nil){ + e = "nil (meaning ok)"; + print("sigalg=\n"); + if(sigalg) + edump(*sigalg); + } + print("self-signed verify_signature returns: %s\n", e); + + rsapubfree(pk); + freecert(c); + print("end X509dump\n"); +} -- cgit v1.2.3