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-rw-r--r--net/ceph/crypto.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c
index 7b505b0c983..5a8009c9e0c 100644
--- a/net/ceph/crypto.c
+++ b/net/ceph/crypto.c
@@ -5,10 +5,23 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <crypto/hash.h>
+#include <linux/key-type.h>
+#include <keys/ceph-type.h>
#include <linux/ceph/decode.h>
#include "crypto.h"
+int ceph_crypto_key_clone(struct ceph_crypto_key *dst,
+ const struct ceph_crypto_key *src)
+{
+ memcpy(dst, src, sizeof(struct ceph_crypto_key));
+ dst->key = kmalloc(src->len, GFP_NOFS);
+ if (!dst->key)
+ return -ENOMEM;
+ memcpy(dst->key, src->key, src->len);
+ return 0;
+}
+
int ceph_crypto_key_encode(struct ceph_crypto_key *key, void **p, void *end)
{
if (*p + sizeof(u16) + sizeof(key->created) +
@@ -410,3 +423,63 @@ int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
return -EINVAL;
}
}
+
+int ceph_key_instantiate(struct key *key, const void *data, size_t datalen)
+{
+ struct ceph_crypto_key *ckey;
+ int ret;
+ void *p;
+
+ ret = -EINVAL;
+ if (datalen <= 0 || datalen > 32767 || !data)
+ goto err;
+
+ ret = key_payload_reserve(key, datalen);
+ if (ret < 0)
+ goto err;
+
+ ret = -ENOMEM;
+ ckey = kmalloc(sizeof(*ckey), GFP_KERNEL);
+ if (!ckey)
+ goto err;
+
+ /* TODO ceph_crypto_key_decode should really take const input */
+ p = (void*)data;
+ ret = ceph_crypto_key_decode(ckey, &p, (char*)data+datalen);
+ if (ret < 0)
+ goto err_ckey;
+
+ key->payload.data = ckey;
+ return 0;
+
+err_ckey:
+ kfree(ckey);
+err:
+ return ret;
+}
+
+int ceph_key_match(const struct key *key, const void *description)
+{
+ return strcmp(key->description, description) == 0;
+}
+
+void ceph_key_destroy(struct key *key) {
+ struct ceph_crypto_key *ckey = key->payload.data;
+
+ ceph_crypto_key_destroy(ckey);
+}
+
+struct key_type key_type_ceph = {
+ .name = "ceph",
+ .instantiate = ceph_key_instantiate,
+ .match = ceph_key_match,
+ .destroy = ceph_key_destroy,
+};
+
+int ceph_crypto_init(void) {
+ return register_key_type(&key_type_ceph);
+}
+
+void ceph_crypto_shutdown(void) {
+ unregister_key_type(&key_type_ceph);
+}