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Check method before access and release ctx in error paths

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- In error paths, EVP_MD_CTX allocated by the callee is not released.
- Checking method before accessing

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
J Mohan Rao Arisankala 2016-02-23 22:33:28 +05:30 committed by Rich Salz
parent 2d51c28ff7
commit 2c91b3f5bf
1 changed files with 8 additions and 4 deletions
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12
crypto/asn1/a_sign.c
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@ -245,7 +245,12 @@ int ASN1_item_sign_ctx(const ASN1_ITEM *it,
if (!type || !pkey) { if (!type || !pkey) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED); ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
return 0; goto err;
}
if (!pkey->ameth) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
goto err;
} }
if (pkey->ameth->item_sign) { if (pkey->ameth->item_sign) {
@ -267,13 +272,12 @@ int ASN1_item_sign_ctx(const ASN1_ITEM *it,
rv = 2; rv = 2;
if (rv == 2) { if (rv == 2) {
if (!pkey->ameth || if (!OBJ_find_sigid_by_algs(&signid,
!OBJ_find_sigid_by_algs(&signid,
EVP_MD_nid(type), EVP_MD_nid(type),
pkey->ameth->pkey_id)) { pkey->ameth->pkey_id)) {
ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
return 0; goto err;
} }
if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)