X.509: fix comparisons of ->pkey_algo

commit 54c1fb39fe0495f846539ab765925b008f86801c upstream.

->pkey_algo used to be an enum, but was changed to a string by commit
4e8ae72a75aa ("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: 4e8ae72a75aa ("X.509: Make algo identifiers text instead of enum")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index 2d93d9e..986033e 100644 (file)
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -150,7 +150,7 @@ 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;

diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index eea71dc..1bd0cf7 100644 (file)
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -135,7 +135,7 @@ 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);