Mercurial > dropbear

comparison rsa.c @ 340:454a34b2dfd1

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Fixes from Erik Hovland: cli-authpubkey.c: fix leak of keybuf cli-kex.c: fix leak of fingerprint fp cli-service.c: remove commented out code dropbearkey.c: don't attepmt to free NULL key on failure common-kex.c: only free key if it is initialised keyimport.c: remove dead encrypted-key code don't leak a FILE* loading OpenSSH keys rsa.c, dss.c: check return values for some libtommath functions svr-kex.c: check return value retrieving DH kex mpint svr-tcpfwd.c: fix null-dereference if remote tcp forward request fails tcp-accept.c: don't incorrectly free the tcpinfo var
author Matt Johnston <matt@ucc.asn.au>
date Fri, 07 Jul 2006 09:17:18 +0000
parents 3cea9d789cca
children ed24dfc44904 a124aff0cbf1
comparison
equal deleted inserted replaced
339:31743c9bdf78 340:454a34b2dfd1
283 gen_random_mpint(key->n, &rsa_tmp2); 283 gen_random_mpint(key->n, &rsa_tmp2);
284 284
285 /* rsa_tmp1 is em */ 285 /* rsa_tmp1 is em */
286 /* em' = em * r^e mod n */ 286 /* em' = em * r^e mod n */
287 287
288 mp_exptmod(&rsa_tmp2, key->e, key->n, &rsa_s); /* rsa_s used as a temp var*/ 288 /* rsa_s used as a temp var*/
289 mp_invmod(&rsa_tmp2, key->n, &rsa_tmp3); 289 if (mp_exptmod(&rsa_tmp2, key->e, key->n, &rsa_s) != MP_OKAY) {
290 mp_mulmod(&rsa_tmp1, &rsa_s, key->n, &rsa_tmp2); 290 dropbear_exit("rsa error");
291 }
292 if (mp_invmod(&rsa_tmp2, key->n, &rsa_tmp3) != MP_OKAY) {
293 dropbear_exit("rsa error");
294 }
295 if (mp_mulmod(&rsa_tmp1, &rsa_s, key->n, &rsa_tmp2) != MP_OKAY) {
296 dropbear_exit("rsa error");
297 }
291 298
292 /* rsa_tmp2 is em' */ 299 /* rsa_tmp2 is em' */
293 /* s' = (em')^d mod n */ 300 /* s' = (em')^d mod n */
294 mp_exptmod(&rsa_tmp2, key->d, key->n, &rsa_tmp1); 301 if (mp_exptmod(&rsa_tmp2, key->d, key->n, &rsa_tmp1) != MP_OKAY) {
302 dropbear_exit("rsa error");
303 }
295 304
296 /* rsa_tmp1 is s' */ 305 /* rsa_tmp1 is s' */
297 /* rsa_tmp3 is r^(-1) mod n */ 306 /* rsa_tmp3 is r^(-1) mod n */
298 /* s = (s')r^(-1) mod n */ 307 /* s = (s')r^(-1) mod n */
299 mp_mulmod(&rsa_tmp1, &rsa_tmp3, key->n, &rsa_s); 308 if (mp_mulmod(&rsa_tmp1, &rsa_tmp3, key->n, &rsa_s) != MP_OKAY) {
309 dropbear_exit("rsa error");
310 }
300 311
301 #else 312 #else
302 313
303 /* s = em^d mod n */ 314 /* s = em^d mod n */
304 /* rsa_tmp1 is em */ 315 /* rsa_tmp1 is em */