aboutsummaryrefslogtreecommitdiff
path: root/include/libsec.h
blob: 008a283db5f235ddf4676868f6394488f2f75106 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
#ifndef _LIBSEC_H_
#define _LIBSEC_H_ 1
#if defined(__cplusplus)
extern "C" { 
#endif
/*
#pragma	lib	"libsec.a"
#pragma	src	"/sys/src/libsec"
*/

AUTOLIB(sec)

#ifndef _MPINT
typedef struct mpint mpint;
#endif

/////////////////////////////////////////////////////////
// AES definitions
/////////////////////////////////////////////////////////

enum
{
	AESbsize=	16,
	AESmaxkey=	32,
	AESmaxrounds=	14
};

typedef struct AESstate AESstate;
struct AESstate
{
	ulong	setup;
	int	rounds;
	int	keybytes;
	uchar	key[AESmaxkey];		/* unexpanded key */
	u32int	ekey[4*(AESmaxrounds + 1)];	/* encryption key */
	u32int	dkey[4*(AESmaxrounds + 1)];	/* decryption key */
	uchar	ivec[AESbsize];	/* initialization vector */
};

void	setupAESstate(AESstate *s, uchar key[], int keybytes, uchar *ivec);
void	aesCBCencrypt(uchar *p, int len, AESstate *s);
void	aesCBCdecrypt(uchar *p, int len, AESstate *s);

/////////////////////////////////////////////////////////
// Blowfish Definitions
/////////////////////////////////////////////////////////

enum
{
	BFbsize	= 8,
	BFrounds	= 16
};

// 16-round Blowfish
typedef struct BFstate BFstate;
struct BFstate
{
	ulong	setup;

	uchar	key[56];
	uchar	ivec[8];

	u32int 	pbox[BFrounds+2];
	u32int	sbox[1024];
};

void	setupBFstate(BFstate *s, uchar key[], int keybytes, uchar *ivec);
void	bfCBCencrypt(uchar*, int, BFstate*);
void	bfCBCdecrypt(uchar*, int, BFstate*);
void	bfECBencrypt(uchar*, int, BFstate*);
void	bfECBdecrypt(uchar*, int, BFstate*);

/////////////////////////////////////////////////////////
// DES definitions
/////////////////////////////////////////////////////////

enum
{
	DESbsize=	8
};

// single des
typedef struct DESstate DESstate;
struct DESstate
{
	ulong	setup;
	uchar	key[8];		/* unexpanded key */
	ulong	expanded[32];	/* expanded key */
	uchar	ivec[8];	/* initialization vector */
};

void	setupDESstate(DESstate *s, uchar key[8], uchar *ivec);
void	des_key_setup(uchar[8], ulong[32]);
void	block_cipher(ulong*, uchar*, int);
void	desCBCencrypt(uchar*, int, DESstate*);
void	desCBCdecrypt(uchar*, int, DESstate*);
void	desECBencrypt(uchar*, int, DESstate*);
void	desECBdecrypt(uchar*, int, DESstate*);

// for backward compatibility with 7 byte DES key format
void	des56to64(uchar *k56, uchar *k64);
void	des64to56(uchar *k64, uchar *k56);
void	key_setup(uchar[7], ulong[32]);

// triple des encrypt/decrypt orderings
enum {
	DES3E=		0,
	DES3D=		1,
	DES3EEE=	0,
	DES3EDE=	2,
	DES3DED=	5,
	DES3DDD=	7
};

typedef struct DES3state DES3state;
struct DES3state
{
	ulong	setup;
	uchar	key[3][8];		/* unexpanded key */
	ulong	expanded[3][32];	/* expanded key */
	uchar	ivec[8];		/* initialization vector */
};

void	setupDES3state(DES3state *s, uchar key[3][8], uchar *ivec);
void	triple_block_cipher(ulong keys[3][32], uchar*, int);
void	des3CBCencrypt(uchar*, int, DES3state*);
void	des3CBCdecrypt(uchar*, int, DES3state*);
void	des3ECBencrypt(uchar*, int, DES3state*);
void	des3ECBdecrypt(uchar*, int, DES3state*);

/////////////////////////////////////////////////////////
// digests
/////////////////////////////////////////////////////////

enum
{
	SHA1dlen=	20,	/* SHA digest length */
	MD4dlen=	16,	/* MD4 digest length */
	MD5dlen=	16	/* MD5 digest length */
};

typedef struct DigestState DigestState;
struct DigestState
{
	ulong len;
	u32int state[5];
	uchar buf[128];
	int blen;
	char malloced;
	char seeded;
};
typedef struct DigestState SHAstate;	/* obsolete name */
typedef struct DigestState SHA1state;
typedef struct DigestState MD5state;
typedef struct DigestState MD4state;

DigestState* md4(uchar*, ulong, uchar*, DigestState*);
DigestState* md5(uchar*, ulong, uchar*, DigestState*);
DigestState* sha1(uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_md5(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha1(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
char* sha1pickle(SHA1state*);
SHA1state* sha1unpickle(char*);

/////////////////////////////////////////////////////////
// random number generation
/////////////////////////////////////////////////////////
void	genrandom(uchar *buf, int nbytes);
void	prng(uchar *buf, int nbytes);
ulong	fastrand(void);
ulong	nfastrand(ulong);

/////////////////////////////////////////////////////////
// primes
/////////////////////////////////////////////////////////
void	genprime(mpint *p, int n, int accuracy); // generate an n bit probable prime
void	gensafeprime(mpint *p, mpint *alpha, int n, int accuracy);	// prime and generator
void	genstrongprime(mpint *p, int n, int accuracy);	// generate an n bit strong prime
void	DSAprimes(mpint *q, mpint *p, uchar seed[SHA1dlen]);
int	probably_prime(mpint *n, int nrep);	// miller-rabin test
int	smallprimetest(mpint *p);		// returns -1 if not prime, 0 otherwise

/////////////////////////////////////////////////////////
// rc4
/////////////////////////////////////////////////////////
typedef struct RC4state RC4state;
struct RC4state
{
	 uchar state[256];
	 uchar x;
	 uchar y;
};

void	setupRC4state(RC4state*, uchar*, int);
void	rc4(RC4state*, uchar*, int);
void	rc4skip(RC4state*, int);
void	rc4back(RC4state*, int);

/////////////////////////////////////////////////////////
// rsa
/////////////////////////////////////////////////////////
typedef struct RSApub RSApub;
typedef struct RSApriv RSApriv;
typedef struct PEMChain PEMChain;

// public/encryption key
struct RSApub
{
	mpint	*n;	// modulus
	mpint	*ek;	// exp (encryption key)
};

// private/decryption key
struct RSApriv
{
	RSApub	pub;

	mpint	*dk;	// exp (decryption key)

	// precomputed values to help with chinese remainder theorem calc
	mpint	*p;
	mpint	*q;
	mpint	*kp;	// dk mod p-1
	mpint	*kq;	// dk mod q-1
	mpint	*c2;	// (inv p) mod q
};

struct PEMChain
{
	PEMChain *next;
	uchar *pem;
	int pemlen;
};

RSApriv*	rsagen(int nlen, int elen, int rounds);
mpint*		rsaencrypt(RSApub *k, mpint *in, mpint *out);
mpint*		rsadecrypt(RSApriv *k, mpint *in, mpint *out);
RSApub*		rsapuballoc(void);
void		rsapubfree(RSApub*);
RSApriv*	rsaprivalloc(void);
void		rsaprivfree(RSApriv*);
RSApub*		rsaprivtopub(RSApriv*);
RSApub*		X509toRSApub(uchar*, int, char*, int);
RSApriv*	asn1toRSApriv(uchar*, int);
uchar*		decodepem(char *s, char *type, int *len, char**);
PEMChain*	decodepemchain(char *s, char *type);
uchar*		X509gen(RSApriv *priv, char *subj, ulong valid[2], int *certlen);

/////////////////////////////////////////////////////////
// elgamal
/////////////////////////////////////////////////////////
typedef struct EGpub EGpub;
typedef struct EGpriv EGpriv;
typedef struct EGsig EGsig;

// public/encryption key
struct EGpub
{
	mpint	*p;	// modulus
	mpint	*alpha;	// generator
	mpint	*key;	// (encryption key) alpha**secret mod p
};

// private/decryption key
struct EGpriv
{
	EGpub	pub;
	mpint	*secret; // (decryption key)
};

// signature
struct EGsig
{
	mpint	*r, *s;
};

EGpriv*		eggen(int nlen, int rounds);
mpint*		egencrypt(EGpub *k, mpint *in, mpint *out);
mpint*		egdecrypt(EGpriv *k, mpint *in, mpint *out);
EGsig*		egsign(EGpriv *k, mpint *m);
int		egverify(EGpub *k, EGsig *sig, mpint *m);
EGpub*		egpuballoc(void);
void		egpubfree(EGpub*);
EGpriv*		egprivalloc(void);
void		egprivfree(EGpriv*);
EGsig*		egsigalloc(void);
void		egsigfree(EGsig*);
EGpub*		egprivtopub(EGpriv*);

/////////////////////////////////////////////////////////
// dsa
/////////////////////////////////////////////////////////
typedef struct DSApub DSApub;
typedef struct DSApriv DSApriv;
typedef struct DSAsig DSAsig;

// public/encryption key
struct DSApub
{
	mpint	*p;	// modulus
	mpint	*q;	// group order, q divides p-1
	mpint	*alpha;	// group generator
	mpint	*key;	// (encryption key) alpha**secret mod p
};

// private/decryption key
struct DSApriv
{
	DSApub	pub;
	mpint	*secret; // (decryption key)
};

// signature
struct DSAsig
{
	mpint	*r, *s;
};

DSApriv*	dsagen(DSApub *opub);
DSAsig*		dsasign(DSApriv *k, mpint *m);
int		dsaverify(DSApub *k, DSAsig *sig, mpint *m);
DSApub*		dsapuballoc(void);
void		dsapubfree(DSApub*);
DSApriv*	dsaprivalloc(void);
void		dsaprivfree(DSApriv*);
DSAsig*		dsasigalloc(void);
void		dsasigfree(DSAsig*);
DSApub*		dsaprivtopub(DSApriv*);

/////////////////////////////////////////////////////////
// TLS
/////////////////////////////////////////////////////////
typedef struct Thumbprint{
	struct Thumbprint *next;
	uchar sha1[SHA1dlen];
} Thumbprint;

typedef struct TLSconn{
	char dir[40];  // connection directory
	uchar *cert;   // certificate (local on input, remote on output)
	uchar *sessionID;
	int certlen, sessionIDlen;
	int (*trace)(char*fmt, ...);
	PEMChain *chain;
} TLSconn;

// tlshand.c
extern int tlsClient(int fd, TLSconn *c);
extern int tlsServer(int fd, TLSconn *c);

// thumb.c
extern Thumbprint* initThumbprints(char *ok, char *crl);
extern void freeThumbprints(Thumbprint *ok);
extern int okThumbprint(uchar *sha1, Thumbprint *ok);

// readcert.c
extern uchar *readcert(char *filename, int *pcertlen);
PEMChain *readcertchain(char *filename);

#if defined(__cplusplus)
}
#endif
#endif