aboutsummaryrefslogtreecommitdiff
path: root/crypto
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2014-07-28 14:11:32 +0100
committerDavid Howells <dhowells@redhat.com>2014-07-29 13:07:58 +0100
commit5ce43ad28262115a1eab866392f8cfb985094160 (patch)
treeb89fbce6bb60fcd4dcb2102a11cf084fa6375552 /crypto
parent185de09c6aa9d38ec04e34b2d9a996561963f895 (diff)
downloadlinux-stericsson-5ce43ad28262115a1eab866392f8cfb985094160.tar.gz
PKCS#7: Use x509_request_asymmetric_key()
pkcs7_request_asymmetric_key() and x509_request_asymmetric_key() do the same thing, the latter being a copy of the former created by the IMA folks, so drop the PKCS#7 version as the X.509 location is more general. Whilst we're at it, rename the arguments of x509_request_asymmetric_key() to better reflect what the values being passed in are intended to match on an X.509 cert. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/asymmetric_keys/pkcs7_trust.c61
-rw-r--r--crypto/asymmetric_keys/x509_public_key.c36
2 files changed, 25 insertions, 72 deletions
diff --git a/crypto/asymmetric_keys/pkcs7_trust.c b/crypto/asymmetric_keys/pkcs7_trust.c
index b6b045131403..e666eb011a85 100644
--- a/crypto/asymmetric_keys/pkcs7_trust.c
+++ b/crypto/asymmetric_keys/pkcs7_trust.c
@@ -20,55 +20,6 @@
#include "public_key.h"
#include "pkcs7_parser.h"
-/*
- * Request an asymmetric key.
- */
-static struct key *pkcs7_request_asymmetric_key(
- struct key *keyring,
- const char *signer, size_t signer_len,
- const char *authority, size_t auth_len)
-{
- key_ref_t key;
- char *id;
-
- kenter(",%zu,,%zu", signer_len, auth_len);
-
- /* Construct an identifier. */
- id = kmalloc(signer_len + 2 + auth_len + 1, GFP_KERNEL);
- if (!id)
- return ERR_PTR(-ENOMEM);
-
- memcpy(id, signer, signer_len);
- id[signer_len + 0] = ':';
- id[signer_len + 1] = ' ';
- memcpy(id + signer_len + 2, authority, auth_len);
- id[signer_len + 2 + auth_len] = 0;
-
- pr_debug("Look up: \"%s\"\n", id);
-
- key = keyring_search(make_key_ref(keyring, 1),
- &key_type_asymmetric, id);
- if (IS_ERR(key))
- pr_debug("Request for module key '%s' err %ld\n",
- id, PTR_ERR(key));
- kfree(id);
-
- if (IS_ERR(key)) {
- switch (PTR_ERR(key)) {
- /* Hide some search errors */
- case -EACCES:
- case -ENOTDIR:
- case -EAGAIN:
- return ERR_PTR(-ENOKEY);
- default:
- return ERR_CAST(key);
- }
- }
-
- pr_devel("<==%s() = 0 [%x]\n", __func__, key_serial(key_ref_to_ptr(key)));
- return key_ref_to_ptr(key);
-}
-
/**
* Check the trust on one PKCS#7 SignedInfo block.
*/
@@ -98,10 +49,8 @@ int pkcs7_validate_trust_one(struct pkcs7_message *pkcs7,
/* Look to see if this certificate is present in the trusted
* keys.
*/
- key = pkcs7_request_asymmetric_key(
- trust_keyring,
- x509->subject, strlen(x509->subject),
- x509->fingerprint, strlen(x509->fingerprint));
+ key = x509_request_asymmetric_key(trust_keyring, x509->subject,
+ x509->fingerprint);
if (!IS_ERR(key))
/* One of the X.509 certificates in the PKCS#7 message
* is apparently the same as one we already trust.
@@ -133,10 +82,8 @@ int pkcs7_validate_trust_one(struct pkcs7_message *pkcs7,
return -ENOKEY;
}
- key = pkcs7_request_asymmetric_key(
- trust_keyring,
- last->issuer, strlen(last->issuer),
- last->authority, strlen(last->authority));
+ key = x509_request_asymmetric_key(trust_keyring, last->issuer,
+ last->authority);
if (IS_ERR(key))
return PTR_ERR(key) == -ENOMEM ? -ENOMEM : -ENOKEY;
x509 = last;
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index 4ae982234d78..da1e5fc85346 100644
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -43,35 +43,41 @@ static int __init ca_keys_setup(char *str)
__setup("ca_keys=", ca_keys_setup);
#endif
-/*
- * Find a key in the given keyring by issuer and authority.
+/**
+ * x509_request_asymmetric_key - Request a key by X.509 certificate params.
+ * @keyring: The keys to search.
+ * @subject: The name of the subject to whom the key belongs.
+ * @key_id: The subject key ID as a hex string.
+ *
+ * Find a key in the given keyring by subject name and key ID. These might,
+ * for instance, be the issuer name and the authority key ID of an X.509
+ * certificate that needs to be verified.
*/
-static struct key *x509_request_asymmetric_key(struct key *keyring,
- const char *signer,
- const char *authority)
+struct key *x509_request_asymmetric_key(struct key *keyring,
+ const char *subject,
+ const char *key_id)
{
key_ref_t key;
- size_t signer_len = strlen(signer), auth_len = strlen(authority);
+ size_t subject_len = strlen(subject), key_id_len = strlen(key_id);
char *id;
- /* Construct an identifier. */
- id = kmalloc(signer_len + 2 + auth_len + 1, GFP_KERNEL);
+ /* Construct an identifier "<subjname>:<keyid>". */
+ id = kmalloc(subject_len + 2 + key_id_len + 1, GFP_KERNEL);
if (!id)
return ERR_PTR(-ENOMEM);
- memcpy(id, signer, signer_len);
- id[signer_len + 0] = ':';
- id[signer_len + 1] = ' ';
- memcpy(id + signer_len + 2, authority, auth_len);
- id[signer_len + 2 + auth_len] = 0;
+ memcpy(id, subject, subject_len);
+ id[subject_len + 0] = ':';
+ id[subject_len + 1] = ' ';
+ memcpy(id + subject_len + 2, key_id, key_id_len);
+ id[subject_len + 2 + key_id_len] = 0;
pr_debug("Look up: \"%s\"\n", id);
key = keyring_search(make_key_ref(keyring, 1),
&key_type_asymmetric, id);
if (IS_ERR(key))
- pr_debug("Request for module key '%s' err %ld\n",
- id, PTR_ERR(key));
+ pr_debug("Request for key '%s' err %ld\n", id, PTR_ERR(key));
kfree(id);
if (IS_ERR(key)) {