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X.509: fix comparisons of ->pkey_algo 

->pkey_algo used to be an enum, but was changed to a string by commit
4e8ae72a75 ("X.509: Make algo identifiers text instead of enum").  But
two comparisons were not updated.  Fix them to use strcmp().

This bug broke signature verification in certain configurations,
depending on whether the string constants were deduplicated or not.

Fixes: 4e8ae72a75 ("X.509: Make algo identifiers text instead of enum")
Cc: <stable@vger.kernel.org> # v4.6+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
Eric Biggers 2017-12-08 15:13:29 +00:00 committed by David Howells
parent 18026d8668
commit 54c1fb39fe
2 changed files with 2 additions and 2 deletions
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2
crypto/asymmetric_keys/pkcs7_verify.c
View File

@ -147,7 +147,7 @@ static int pkcs7_find_key(struct pkcs7_message *pkcs7,
pr_devel("Sig %u: Found cert serial match X.509[%u]\n",
sinfo->index, certix);
if (x509->pub->pkey_algo != sinfo->sig->pkey_algo) {
if (strcmp(x509->pub->pkey_algo, sinfo->sig->pkey_algo) != 0) {
pr_warn("Sig %u: X.509 algo and PKCS#7 sig algo don't match\n",
sinfo->index);
continue;

2
crypto/asymmetric_keys/x509_public_key.c
View File

@ -131,7 +131,7 @@ int x509_check_for_self_signed(struct x509_certificate *cert)
}
ret = -EKEYREJECTED;
if (cert->pub->pkey_algo != cert->sig->pkey_algo)
if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0)
goto out;
ret = public_key_verify_signature(cert->pub, cert->sig);