From 5859bc62f3dc79aea2844f0349cfa9dcbd570dfb Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Sat, 1 Aug 2015 15:38:11 +0100 Subject: [PATCH] Return error for unsupported modes. PR#3974 PR#3975 Reviewed-by: Matt Caswell --- crypto/evp/evp_lib.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/crypto/evp/evp_lib.c b/crypto/evp/evp_lib.c index a53a27ca0c..d2c9ae4d59 100644 --- a/crypto/evp/evp_lib.c +++ b/crypto/evp/evp_lib.c @@ -72,11 +72,21 @@ int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type) if (c->cipher->set_asn1_parameters != NULL) ret = c->cipher->set_asn1_parameters(c, type); else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) { - if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) { + switch (EVP_CIPHER_CTX_mode(c)) { + case EVP_CIPH_WRAP_MODE: ASN1_TYPE_set(type, V_ASN1_NULL, NULL); ret = 1; - } else + break; + + case EVP_CIPH_GCM_MODE: + case EVP_CIPH_CCM_MODE: + case EVP_CIPH_XTS_MODE: + ret = -1; + break; + + default: ret = EVP_CIPHER_set_asn1_iv(c, type); + } } else ret = -1; return (ret); @@ -89,9 +99,22 @@ int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type) if (c->cipher->get_asn1_parameters != NULL) ret = c->cipher->get_asn1_parameters(c, type); else if (c->cipher->flags & EVP_CIPH_FLAG_DEFAULT_ASN1) { - if (EVP_CIPHER_CTX_mode(c) == EVP_CIPH_WRAP_MODE) - return 1; - ret = EVP_CIPHER_get_asn1_iv(c, type); + switch (EVP_CIPHER_CTX_mode(c)) { + + case EVP_CIPH_WRAP_MODE: + ret = 1; + break; + + case EVP_CIPH_GCM_MODE: + case EVP_CIPH_CCM_MODE: + case EVP_CIPH_XTS_MODE: + ret = -1; + break; + + default: + ret = EVP_CIPHER_get_asn1_iv(c, type); + break; + } } else ret = -1; return (ret); -- 2.34.1