diff options
Diffstat (limited to 'crypto/dh/dh_check.c')
-rw-r--r-- | crypto/dh/dh_check.c | 37 |
1 files changed, 11 insertions, 26 deletions
diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c index c7e1dbf4ac0f..d13d8206ce50 100644 --- a/crypto/dh/dh_check.c +++ b/crypto/dh/dh_check.c @@ -24,7 +24,8 @@ int DH_check_params_ex(const DH *dh) { int errflags = 0; - (void)DH_check_params(dh, &errflags); + if (!DH_check_params(dh, &errflags)) + return 0; if ((errflags & DH_CHECK_P_NOT_PRIME) != 0) DHerr(DH_F_DH_CHECK_PARAMS_EX, DH_R_CHECK_P_NOT_PRIME); @@ -67,18 +68,14 @@ int DH_check_params(const DH *dh, int *ret) /*- * Check that p is a safe prime and - * if g is 2, 3 or 5, check that it is a suitable generator - * where - * for 2, p mod 24 == 11 - * for 3, p mod 12 == 5 - * for 5, p mod 10 == 3 or 7 - * should hold. + * g is a suitable generator. */ int DH_check_ex(const DH *dh) { int errflags = 0; - (void)DH_check(dh, &errflags); + if (!DH_check(dh, &errflags)) + return 0; if ((errflags & DH_NOT_SUITABLE_GENERATOR) != 0) DHerr(DH_F_DH_CHECK_EX, DH_R_NOT_SUITABLE_GENERATOR); @@ -102,10 +99,11 @@ int DH_check(const DH *dh, int *ret) { int ok = 0, r; BN_CTX *ctx = NULL; - BN_ULONG l; BIGNUM *t1 = NULL, *t2 = NULL; - *ret = 0; + if (!DH_check_params(dh, ret)) + return 0; + ctx = BN_CTX_new(); if (ctx == NULL) goto err; @@ -139,21 +137,7 @@ int DH_check(const DH *dh, int *ret) *ret |= DH_CHECK_INVALID_Q_VALUE; if (dh->j && BN_cmp(dh->j, t1)) *ret |= DH_CHECK_INVALID_J_VALUE; - - } else if (BN_is_word(dh->g, DH_GENERATOR_2)) { - l = BN_mod_word(dh->p, 24); - if (l == (BN_ULONG)-1) - goto err; - if (l != 11) - *ret |= DH_NOT_SUITABLE_GENERATOR; - } else if (BN_is_word(dh->g, DH_GENERATOR_5)) { - l = BN_mod_word(dh->p, 10); - if (l == (BN_ULONG)-1) - goto err; - if ((l != 3) && (l != 7)) - *ret |= DH_NOT_SUITABLE_GENERATOR; - } else - *ret |= DH_UNABLE_TO_CHECK_GENERATOR; + } r = BN_is_prime_ex(dh->p, DH_NUMBER_ITERATIONS_FOR_PRIME, ctx, NULL); if (r < 0) @@ -180,7 +164,8 @@ int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key) { int errflags = 0; - (void)DH_check(dh, &errflags); + if (!DH_check_pub_key(dh, pub_key, &errflags)) + return 0; if ((errflags & DH_CHECK_PUBKEY_TOO_SMALL) != 0) DHerr(DH_F_DH_CHECK_PUB_KEY_EX, DH_R_CHECK_PUBKEY_TOO_SMALL); |