Commit 1252cc3b authored by Roberto Sassu's avatar Roberto Sassu Committed by Mimi Zohar

eCryptfs: added support for the encrypted key type

The function ecryptfs_keyring_auth_tok_for_sig() has been modified in order
to search keys of both 'user' and 'encrypted' types.
Signed-off-by: default avatarRoberto Sassu <roberto.sassu@polito.it>
Acked-by: default avatarGianluca Ramunno <ramunno@polito.it>
Acked-by: default avatarTyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
parent 79a73d18
......@@ -29,6 +29,7 @@
#define ECRYPTFS_KERNEL_H
#include <keys/user-type.h>
#include <keys/encrypted-type.h>
#include <linux/fs.h>
#include <linux/fs_stack.h>
#include <linux/namei.h>
......@@ -78,11 +79,47 @@ struct ecryptfs_page_crypt_context {
} param;
};
#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
static inline struct ecryptfs_auth_tok *
ecryptfs_get_encrypted_key_payload_data(struct key *key)
{
if (key->type == &key_type_encrypted)
return (struct ecryptfs_auth_tok *)
(&((struct encrypted_key_payload *)key->payload.data)->payload_data);
else
return NULL;
}
static inline struct key *ecryptfs_get_encrypted_key(char *sig)
{
return request_key(&key_type_encrypted, sig, NULL);
}
#else
static inline struct ecryptfs_auth_tok *
ecryptfs_get_encrypted_key_payload_data(struct key *key)
{
return NULL;
}
static inline struct key *ecryptfs_get_encrypted_key(char *sig)
{
return ERR_PTR(-ENOKEY);
}
#endif /* CONFIG_ENCRYPTED_KEYS */
static inline struct ecryptfs_auth_tok *
ecryptfs_get_key_payload_data(struct key *key)
{
struct ecryptfs_auth_tok *auth_tok;
auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
if (!auth_tok)
return (struct ecryptfs_auth_tok *)
(((struct user_key_payload*)key->payload.data)->data);
(((struct user_key_payload *)key->payload.data)->data);
else
return auth_tok;
}
#define ECRYPTFS_MAX_KEYSET_SIZE 1024
......
......@@ -1634,6 +1634,8 @@ int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
int rc = 0;
(*auth_tok_key) = request_key(&key_type_user, sig, NULL);
if (!(*auth_tok_key) || IS_ERR(*auth_tok_key)) {
(*auth_tok_key) = ecryptfs_get_encrypted_key(sig);
if (!(*auth_tok_key) || IS_ERR(*auth_tok_key)) {
printk(KERN_ERR "Could not find key with description: [%s]\n",
sig);
......@@ -1641,6 +1643,7 @@ int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
(*auth_tok_key) = NULL;
goto out;
}
}
down_write(&(*auth_tok_key)->sem);
rc = ecryptfs_verify_auth_tok_from_key(*auth_tok_key, auth_tok);
if (rc) {
......
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