diff options
| author | Jung-uk Kim <jkim@FreeBSD.org> | 2016-09-22 13:05:59 +0000 |
|---|---|---|
| committer | Jung-uk Kim <jkim@FreeBSD.org> | 2016-09-22 13:05:59 +0000 |
| commit | 2c14c598c3061ac2533f997352aa06a2266f44d9 (patch) | |
| tree | 470894a14935f308eeac93c6cbf6cf25632e1cb1 /crypto/srp/srp_lib.c | |
| parent | 47b11f985b9e0ff561a67e19674de6fbcf79281d (diff) | |
Notes
Diffstat (limited to 'crypto/srp/srp_lib.c')
| -rw-r--r-- | crypto/srp/srp_lib.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/crypto/srp/srp_lib.c b/crypto/srp/srp_lib.c index e9a2e058f6877..e310946e073bc 100644 --- a/crypto/srp/srp_lib.c +++ b/crypto/srp/srp_lib.c @@ -159,8 +159,7 @@ BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, if (u == NULL || A == NULL || v == NULL || b == NULL || N == NULL) return NULL; - if ((bn_ctx = BN_CTX_new()) == NULL || - (tmp = BN_new()) == NULL || (S = BN_new()) == NULL) + if ((bn_ctx = BN_CTX_new()) == NULL || (tmp = BN_new()) == NULL) goto err; /* S = (A*v**u) ** b */ @@ -169,8 +168,12 @@ BIGNUM *SRP_Calc_server_key(BIGNUM *A, BIGNUM *v, BIGNUM *u, BIGNUM *b, goto err; if (!BN_mod_mul(tmp, A, tmp, N, bn_ctx)) goto err; - if (!BN_mod_exp(S, tmp, b, N, bn_ctx)) - goto err; + + S = BN_new(); + if (S != NULL && !BN_mod_exp(S, tmp, b, N, bn_ctx)) { + BN_free(S); + S = NULL; + } err: BN_CTX_free(bn_ctx); BN_clear_free(tmp); @@ -267,7 +270,7 @@ BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, if ((tmp = BN_new()) == NULL || (tmp2 = BN_new()) == NULL || - (tmp3 = BN_new()) == NULL || (K = BN_new()) == NULL) + (tmp3 = BN_new()) == NULL) goto err; if (!BN_mod_exp(tmp, g, x, N, bn_ctx)) @@ -283,8 +286,11 @@ BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x, goto err; if (!BN_mod_add(tmp2, a, tmp3, N, bn_ctx)) goto err; - if (!BN_mod_exp(K, tmp, tmp2, N, bn_ctx)) - goto err; + K = BN_new(); + if (K != NULL && !BN_mod_exp(K, tmp, tmp2, N, bn_ctx)) { + BN_free(K); + K = NULL; + } err: BN_CTX_free(bn_ctx); |