Mercurial > dropbear

annotate src/pk/dsa/dsa_sign_hash.c @ 230:809b681a9af5 libtomcrypt

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
- check for generic AES/TWOFISH settings from Dropbear, not AES128 etc
author Matt Johnston <matt@ucc.asn.au>
date Tue, 30 Aug 2005 17:40:30 +0000
parents 39d5d58461d6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 * LibTomCrypt is a library that provides various cryptographic
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 * algorithms in a highly modular and flexible manner.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 * The library is free for all purposes without any express
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 * guarantee it works.
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 *
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * Tom St Denis, [email protected], http://libtomcrypt.org
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 #include "tomcrypt.h"
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 @file dsa_sign_hash.c
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 DSA implementation, sign a hash, Tom St Denis
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 #ifdef MDSA
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 /**
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 Sign a hash with DSA
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 @param in The hash to sign
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 @param inlen The length of the hash to sign
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
24 @param r The "r" integer of the signature (caller must initialize with mp_init() first)
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
25 @param s The "s" integer of the signature (caller must initialize with mp_init() first)
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 @param prng An active PRNG state
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 @param wprng The index of the PRNG desired
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 @param key A private DSA key
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 @return CRYPT_OK if successful
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 */
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
31 int dsa_sign_hash_raw(const unsigned char *in, unsigned long inlen,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
32 mp_int *r, mp_int *s,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
33 prng_state *prng, int wprng, dsa_key *key)
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 {
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
35 mp_int k, kinv, tmp;
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
36 unsigned char *buf;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37 int err;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
38
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
39 LTC_ARGCHK(in != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
40 LTC_ARGCHK(r != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
41 LTC_ARGCHK(s != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
42 LTC_ARGCHK(key != NULL);
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 return err;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 if (key->type != PK_PRIVATE) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48 return CRYPT_PK_NOT_PRIVATE;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51 /* check group order size */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 if (key->qord >= MDSA_MAX_GROUP) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 return CRYPT_INVALID_ARG;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 buf = XMALLOC(MDSA_MAX_GROUP);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 if (buf == NULL) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 return CRYPT_MEM;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 /* Init our temps */
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
62 if ((err = mp_init_multi(&k, &kinv, &tmp, NULL)) != MP_OKAY) { goto error; }
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 retry:
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 do {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 /* gen random k */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 if (prng_descriptor[wprng].read(buf, key->qord, prng) != (unsigned long)key->qord) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 err = CRYPT_ERROR_READPRNG;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 goto LBL_ERR;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 /* read k */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 if ((err = mp_read_unsigned_bin(&k, buf, key->qord)) != MP_OKAY) { goto error; }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 /* k > 1 ? */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 if (mp_cmp_d(&k, 1) != MP_GT) { goto retry; }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 /* test gcd */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 if ((err = mp_gcd(&k, &key->q, &tmp)) != MP_OKAY) { goto error; }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81 } while (mp_cmp_d(&tmp, 1) != MP_EQ);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 /* now find 1/k mod q */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 if ((err = mp_invmod(&k, &key->q, &kinv)) != MP_OKAY) { goto error; }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 /* now find r = g^k mod p mod q */
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
87 if ((err = mp_exptmod(&key->g, &k, &key->p, r)) != MP_OKAY) { goto error; }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
88 if ((err = mp_mod(r, &key->q, r)) != MP_OKAY) { goto error; }
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
90 if (mp_iszero(r) == MP_YES) { goto retry; }
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 /* now find s = (in + xr)/k mod q */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 if ((err = mp_read_unsigned_bin(&tmp, (unsigned char *)in, inlen)) != MP_OKAY) { goto error; }
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
94 if ((err = mp_mul(&key->x, r, s)) != MP_OKAY) { goto error; }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
95 if ((err = mp_add(s, &tmp, s)) != MP_OKAY) { goto error; }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
96 if ((err = mp_mulmod(s, &kinv, &key->q, s)) != MP_OKAY) { goto error; }
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
98 if (mp_iszero(s) == MP_YES) { goto retry; }
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
100 err = CRYPT_OK;
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 goto LBL_ERR;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 error:
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 err = mpi_to_ltc_error(err);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 LBL_ERR:
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
106 mp_clear_multi(&k, &kinv, &tmp, NULL);
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 #ifdef LTC_CLEAN_STACK
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 zeromem(buf, MDSA_MAX_GROUP);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 #endif
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110 XFREE(buf);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 return err;
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
114 /**
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
115 Sign a hash with DSA
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
116 @param in The hash to sign
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
117 @param inlen The length of the hash to sign
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
118 @param out [out] Where to store the signature
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
119 @param outlen [in/out] The max size and resulting size of the signature
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
120 @param prng An active PRNG state
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
121 @param wprng The index of the PRNG desired
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
122 @param key A private DSA key
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
123 @return CRYPT_OK if successful
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
124 */
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
125 int dsa_sign_hash(const unsigned char *in, unsigned long inlen,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
126 unsigned char *out, unsigned long *outlen,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
127 prng_state *prng, int wprng, dsa_key *key)
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
128 {
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
129 mp_int r, s;
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
130 int err;
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
131
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
132 LTC_ARGCHK(in != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
133 LTC_ARGCHK(out != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
134 LTC_ARGCHK(outlen != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
135 LTC_ARGCHK(key != NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
136
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
137 if (mp_init_multi(&r, &s, NULL) != MP_OKAY) {
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
138 return CRYPT_MEM;
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
139 }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
140
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
141 if ((err = dsa_sign_hash_raw(in, inlen, &r, &s, prng, wprng, key)) != CRYPT_OK) {
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
142 goto LBL_ERR;
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
143 }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
144
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
145 err = der_encode_sequence_multi(out, outlen,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
146 LTC_ASN1_INTEGER, 1UL, &r,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
147 LTC_ASN1_INTEGER, 1UL, &s,
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
148 LTC_ASN1_EOL, 0UL, NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
149
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
150 LBL_ERR:
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
151 mp_clear_multi(&r, &s, NULL);
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
152 return err;
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
153 }
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
154
191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
155 #endif
209
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
156
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
157 /* $Source: /cvs/libtom/libtomcrypt/src/pk/dsa/dsa_sign_hash.c,v $ */
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
158 /* $Revision: 1.6 $ */
39d5d58461d6 Import of libtomcrypt 1.05
Matt Johnston <matt@ucc.asn.au>
parents: 191
diff changeset
159 /* $Date: 2005/05/15 21:48:59 $ */