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author | rsc <devnull@localhost> | 2004-03-21 14:04:56 +0000 |
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committer | rsc <devnull@localhost> | 2004-03-21 14:04:56 +0000 |
commit | 0fc65b37a1e7585ca2347bf61dcb8bc3a6b146a4 (patch) | |
tree | dd9189a823998f494082adb769451f12be056566 /src/libsec/port/hmac.c | |
parent | 768206abfcf505fb034a0151bf263bc0b1f2380c (diff) | |
download | plan9port-0fc65b37a1e7585ca2347bf61dcb8bc3a6b146a4.tar.gz plan9port-0fc65b37a1e7585ca2347bf61dcb8bc3a6b146a4.tar.bz2 plan9port-0fc65b37a1e7585ca2347bf61dcb8bc3a6b146a4.zip |
Add most of libsec.
Diffstat (limited to 'src/libsec/port/hmac.c')
-rw-r--r-- | src/libsec/port/hmac.c | 56 |
1 files changed, 56 insertions, 0 deletions
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 <libsec.h> + +/* 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<klen; i++) + pad[i] ^= key[i]; + s = (*x)(pad, 64, nil, nil); + if(s == nil) + return nil; + } + + s = (*x)(p, len, nil, s); + if(digest == nil) + return s; + + /* last time through */ + for(i=0; i<64; i++) + pad[i] = 0x5c; + pad[64] = 0; + for(i=0; i<klen; i++) + pad[i] ^= key[i]; + (*x)(nil, 0, innerdigest, s); + s = (*x)(pad, 64, nil, nil); + (*x)(innerdigest, xlen, digest, s); + return nil; +} + +DigestState* +hmac_sha1(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s) +{ + return hmac_x(p, len, key, klen, digest, s, sha1, SHA1dlen); +} + +DigestState* +hmac_md5(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s) +{ + return hmac_x(p, len, key, klen, digest, s, md5, MD5dlen); +} |