[RFC PATCH 3/7] KEYS: Add identifier pointers to public_key_signature struct

[David Howells <dhowells@redhat.com>]

Add key identifier pointers to public_key_signature struct so that they can
be used to retain the identifier of the key to be used to verify the
signature in both PKCS#7 and X.509.

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

 crypto/asymmetric_keys/signature.c |    4 ++++
 include/crypto/public_key.h        |    1 +
 2 files changed, 5 insertions(+)

diff --git a/crypto/asymmetric_keys/signature.c b/crypto/asymmetric_keys/signature.c
index 3beee3976ed5..11b7ba170904 100644
--- a/crypto/asymmetric_keys/signature.c
+++ b/crypto/asymmetric_keys/signature.c
@@ -24,7 +24,11 @@
  */
 void public_key_signature_free(struct public_key_signature *sig)
 {
+	int i;
+
 	if (sig) {
+		for (i = 0; i < ARRAY_SIZE(sig->auth_ids); i++)
+			kfree(sig->auth_ids[i]);
 		kfree(sig->s);
 		kfree(sig->digest);
 		kfree(sig);
diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
index 19f557ca50ba..2f5de5c1a3a0 100644
--- a/include/crypto/public_key.h
+++ b/include/crypto/public_key.h
@@ -47,6 +47,7 @@ extern void public_key_free(struct public_key *key);
  * Public key cryptography signature data
  */
 struct public_key_signature {
+	struct asymmetric_key_id *auth_ids[2];
 	u8 *s;			/* Signature */
 	u32 s_size;		/* Number of bytes in signature */
 	u8 *digest;