Mercurial > dropbear

comparison dss.c @ 118:5312ca05ed48 private-rez

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propagate of 717950f4061f1123659ee87c7c168805af920ab7 and 839f98f136788cc1466e4641bf796f96040a085d from branch 'matt.dbclient.authpam' to 'matt.dbclient.rez'
author Matt Johnston <matt@ucc.asn.au>
date Sun, 12 Sep 2004 04:56:50 +0000
parents 29a5c7c62350
children 82fcf3185616
comparison
equal deleted inserted replaced
57:3b2a5a1c4347 118:5312ca05ed48
162 unsigned int len) { 162 unsigned int len) {
163 163
164 unsigned char msghash[SHA1_HASH_SIZE]; 164 unsigned char msghash[SHA1_HASH_SIZE];
165 hash_state hs; 165 hash_state hs;
166 int ret = DROPBEAR_FAILURE; 166 int ret = DROPBEAR_FAILURE;
167 mp_int val1, val2, val3, val4; 167 DEF_MP_INT(val1);
168 DEF_MP_INT(val2);
169 DEF_MP_INT(val3);
170 DEF_MP_INT(val4);
168 char * string = NULL; 171 char * string = NULL;
169 int stringlen; 172 int stringlen;
170 173
171 TRACE(("enter buf_dss_verify")); 174 TRACE(("enter buf_dss_verify"));
172 assert(key != NULL); 175 assert(key != NULL);
176
177 m_mp_init_multi(&val1, &val2, &val3, &val4, NULL);
173 178
174 /* get blob, check length */ 179 /* get blob, check length */
175 string = buf_getstring(buf, &stringlen); 180 string = buf_getstring(buf, &stringlen);
176 if (stringlen != 2*SHA1_HASH_SIZE) { 181 if (stringlen != 2*SHA1_HASH_SIZE) {
177 goto out; 182 goto out;
179 184
180 /* hash the data */ 185 /* hash the data */
181 sha1_init(&hs); 186 sha1_init(&hs);
182 sha1_process(&hs, data, len); 187 sha1_process(&hs, data, len);
183 sha1_done(&hs, msghash); 188 sha1_done(&hs, msghash);
184
185 m_mp_init_multi(&val1, &val2, &val3, &val4, NULL);
186 189
187 /* create the signature - s' and r' are the received signatures in buf */ 190 /* create the signature - s' and r' are the received signatures in buf */
188 /* w = (s')-1 mod q */ 191 /* w = (s')-1 mod q */
189 /* let val1 = s' */ 192 /* let val1 = s' */
190 if (mp_read_unsigned_bin(&val1, &string[SHA1_HASH_SIZE], SHA1_HASH_SIZE) 193 if (mp_read_unsigned_bin(&val1, &string[SHA1_HASH_SIZE], SHA1_HASH_SIZE)
279 unsigned int i; 282 unsigned int i;
280 #ifdef DSS_PROTOK 283 #ifdef DSS_PROTOK
281 unsigned char privkeyhash[SHA512_HASH_SIZE]; 284 unsigned char privkeyhash[SHA512_HASH_SIZE];
282 unsigned char *privkeytmp; 285 unsigned char *privkeytmp;
283 unsigned char proto_k[SHA512_HASH_SIZE]; 286 unsigned char proto_k[SHA512_HASH_SIZE];
284 mp_int dss_protok; 287 DEF_MP_INT(dss_protok);
285 #else 288 #else
286 unsigned char kbuf[SHA1_HASH_SIZE]; 289 unsigned char kbuf[SHA1_HASH_SIZE];
287 #endif 290 #endif
288 mp_int dss_k, dss_m; 291 DEF_MP_INT(dss_k);
289 mp_int dss_temp1, dss_temp2; 292 DEF_MP_INT(dss_m);
290 mp_int dss_r, dss_s; 293 DEF_MP_INT(dss_temp1);
294 DEF_MP_INT(dss_temp2);
295 DEF_MP_INT(dss_r);
296 DEF_MP_INT(dss_s);
291 hash_state hs; 297 hash_state hs;
292 298
293 TRACE(("enter buf_put_dss_sign")); 299 TRACE(("enter buf_put_dss_sign"));
294 assert(key != NULL); 300 assert(key != NULL);
295 301