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authorDavid Howells <dhowells@redhat.com>2016-04-06 16:13:33 +0100
committerDavid Howells <dhowells@redhat.com>2016-04-06 16:13:33 +0100
commit3b764563177c1e435ef3e2608271c07955f73ea6 (patch)
tree6c2c109d6fdde374e9a514976f49e236f79459f4 /crypto
parent864e7a816a0646a6d9aecbd59a8e366c39b8ad2d (diff)
downloadlinux-3b764563177c1e435ef3e2608271c07955f73ea6.tar.gz
KEYS: Allow authentication data to be stored in an asymmetric key
Allow authentication data to be stored in an asymmetric key in the 4th element of the key payload and provide a way for it to be destroyed. For the public key subtype, this will be a public_key_signature struct. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/asymmetric_keys/asymmetric_type.c7
-rw-r--r--crypto/asymmetric_keys/public_key.c20
-rw-r--r--crypto/asymmetric_keys/signature.c14
-rw-r--r--crypto/asymmetric_keys/x509_cert_parser.c2
4 files changed, 34 insertions, 9 deletions
diff --git a/crypto/asymmetric_keys/asymmetric_type.c b/crypto/asymmetric_keys/asymmetric_type.c
index 9f2165b27d52..a79d30128821 100644
--- a/crypto/asymmetric_keys/asymmetric_type.c
+++ b/crypto/asymmetric_keys/asymmetric_type.c
@@ -331,7 +331,8 @@ static void asymmetric_key_free_preparse(struct key_preparsed_payload *prep)
pr_devel("==>%s()\n", __func__);
if (subtype) {
- subtype->destroy(prep->payload.data[asym_crypto]);
+ subtype->destroy(prep->payload.data[asym_crypto],
+ prep->payload.data[asym_auth]);
module_put(subtype->owner);
}
asymmetric_key_free_kids(kids);
@@ -346,13 +347,15 @@ static void asymmetric_key_destroy(struct key *key)
struct asymmetric_key_subtype *subtype = asymmetric_key_subtype(key);
struct asymmetric_key_ids *kids = key->payload.data[asym_key_ids];
void *data = key->payload.data[asym_crypto];
+ void *auth = key->payload.data[asym_auth];
key->payload.data[asym_crypto] = NULL;
key->payload.data[asym_subtype] = NULL;
key->payload.data[asym_key_ids] = NULL;
+ key->payload.data[asym_auth] = NULL;
if (subtype) {
- subtype->destroy(data);
+ subtype->destroy(data, auth);
module_put(subtype->owner);
}
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 0f8b264b3961..fd76b5fc3b3a 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -39,15 +39,23 @@ static void public_key_describe(const struct key *asymmetric_key,
/*
* Destroy a public key algorithm key.
*/
-void public_key_destroy(void *payload)
+void public_key_free(struct public_key *key)
{
- struct public_key *key = payload;
-
- if (key)
+ if (key) {
kfree(key->key);
- kfree(key);
+ kfree(key);
+ }
+}
+EXPORT_SYMBOL_GPL(public_key_free);
+
+/*
+ * Destroy a public key algorithm key.
+ */
+static void public_key_destroy(void *payload0, void *payload3)
+{
+ public_key_free(payload0);
+ public_key_signature_free(payload3);
}
-EXPORT_SYMBOL_GPL(public_key_destroy);
struct public_key_completion {
struct completion completion;
diff --git a/crypto/asymmetric_keys/signature.c b/crypto/asymmetric_keys/signature.c
index 004d5fc8e56b..3beee3976ed5 100644
--- a/crypto/asymmetric_keys/signature.c
+++ b/crypto/asymmetric_keys/signature.c
@@ -15,9 +15,23 @@
#include <keys/asymmetric-subtype.h>
#include <linux/export.h>
#include <linux/err.h>
+#include <linux/slab.h>
#include <crypto/public_key.h>
#include "asymmetric_keys.h"
+/*
+ * Destroy a public key signature.
+ */
+void public_key_signature_free(struct public_key_signature *sig)
+{
+ if (sig) {
+ kfree(sig->s);
+ kfree(sig->digest);
+ kfree(sig);
+ }
+}
+EXPORT_SYMBOL_GPL(public_key_signature_free);
+
/**
* verify_signature - Initiate the use of an asymmetric key to verify a signature
* @key: The asymmetric key to verify against
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 4a29bac70060..05251c7f9a03 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -47,7 +47,7 @@ struct x509_parse_context {
void x509_free_certificate(struct x509_certificate *cert)
{
if (cert) {
- public_key_destroy(cert->pub);
+ public_key_free(cert->pub);
kfree(cert->issuer);
kfree(cert->subject);
kfree(cert->id);