linux-kernel - [RFC PATCH 06/12] X.509: Use verify_signature() if we have a struct key * to use [ver #4]

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Message-ID: <20160407085839.29311.79768.stgit@warthog.procyon.org.uk>
Date:	Thu, 07 Apr 2016 09:58:39 +0100
From:	David Howells <dhowells@...hat.com>
To:	zohar@...ux.vnet.ibm.com
Cc:	dhowells@...hat.com, linux-security-module@...r.kernel.org,
	keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 06/12] X.509: Use verify_signature() if we have a struct
 key * to use [ver #4]

We should call verify_signature() rather than directly calling
public_key_verify_signature() if we have a struct key to use as we
shouldn't be poking around in the private data of the key struct as that's
subtype dependent.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 crypto/asymmetric_keys/x509_public_key.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index 9c8483ef1cfe..117a6ee71a4d 100644
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -220,8 +220,7 @@ static int x509_validate_trust(struct x509_certificate *cert,
 
 	if (!use_builtin_keys ||
 	    test_bit(KEY_FLAG_BUILTIN, &key->flags)) {
-		ret = public_key_verify_signature(
-			key->payload.data[asym_crypto], cert->sig);
+		ret = verify_signature(key, cert->sig);
 		if (ret == -ENOPKG)
 			cert->unsupported_sig = true;
 	}