/* key.c: basic authentication token and access key management
*
- * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/security.h>
#include <linux/workqueue.h>
#include <linux/err.h>
#include "internal.h"
found:
atomic_inc(&user->usage);
spin_unlock(&key_user_lock);
- if (candidate)
- kfree(candidate);
+ kfree(candidate);
out:
return user;
struct key_user *user = NULL;
struct key *key;
size_t desclen, quotalen;
+ int ret;
key = ERR_PTR(-EINVAL);
if (!desc || !*desc)
key->flags = 0;
key->expiry = 0;
key->payload.data = NULL;
+ key->security = NULL;
if (!not_in_quota)
key->flags |= 1 << KEY_FLAG_IN_QUOTA;
key->magic = KEY_DEBUG_MAGIC;
#endif
+ /* let the security module know about the key */
+ ret = security_key_alloc(key);
+ if (ret < 0)
+ goto security_error;
+
/* publish the key by giving it a serial number */
atomic_inc(&user->nkeys);
key_alloc_serial(key);
- error:
+error:
return key;
- no_memory_3:
+security_error:
+ kfree(key->description);
kmem_cache_free(key_jar, key);
- no_memory_2:
if (!not_in_quota) {
spin_lock(&user->lock);
user->qnkeys--;
spin_unlock(&user->lock);
}
key_user_put(user);
- no_memory_1:
+ key = ERR_PTR(ret);
+ goto error;
+
+no_memory_3:
+ kmem_cache_free(key_jar, key);
+no_memory_2:
+ if (!not_in_quota) {
+ spin_lock(&user->lock);
+ user->qnkeys--;
+ user->qnbytes -= quotalen;
+ spin_unlock(&user->lock);
+ }
+ key_user_put(user);
+no_memory_1:
key = ERR_PTR(-ENOMEM);
goto error;
- no_quota:
+no_quota:
spin_unlock(&user->lock);
key_user_put(user);
key = ERR_PTR(-EDQUOT);
key_check(key);
+ security_key_free(key);
+
/* deal with the user's key tracking and quota */
if (test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) {
spin_lock(&key->user->lock);
* - the key has an incremented refcount
* - we need to put the key if we get an error
*/
-static inline struct key *__key_update(struct key *key, const void *payload,
- size_t plen)
+static inline key_ref_t __key_update(key_ref_t key_ref,
+ const void *payload, size_t plen)
{
+ struct key *key = key_ref_to_ptr(key_ref);
int ret;
/* need write permission on the key to update it */
- ret = -EACCES;
- if (!key_permission(key, KEY_WRITE))
+ ret = key_permission(key_ref, KEY_WRITE);
+ if (ret < 0)
goto error;
ret = -EEXIST;
down_write(&key->sem);
ret = key->type->update(key, payload, plen);
-
if (ret == 0)
/* updating a negative key instantiates it */
clear_bit(KEY_FLAG_NEGATIVE, &key->flags);
if (ret < 0)
goto error;
- out:
- return key;
+out:
+ return key_ref;
- error:
+error:
key_put(key);
- key = ERR_PTR(ret);
+ key_ref = ERR_PTR(ret);
goto out;
} /* end __key_update() */
* search the specified keyring for a key of the same description; if one is
* found, update it, otherwise add a new one
*/
-struct key *key_create_or_update(struct key *keyring,
- const char *type,
- const char *description,
- const void *payload,
- size_t plen,
- int not_in_quota)
+key_ref_t key_create_or_update(key_ref_t keyring_ref,
+ const char *type,
+ const char *description,
+ const void *payload,
+ size_t plen,
+ int not_in_quota)
{
struct key_type *ktype;
- struct key *key = NULL;
+ struct key *keyring, *key = NULL;
key_perm_t perm;
+ key_ref_t key_ref;
int ret;
- key_check(keyring);
-
/* look up the key type to see if it's one of the registered kernel
* types */
ktype = key_type_lookup(type);
if (IS_ERR(ktype)) {
- key = ERR_PTR(-ENODEV);
+ key_ref = ERR_PTR(-ENODEV);
goto error;
}
- ret = -EINVAL;
+ key_ref = ERR_PTR(-EINVAL);
if (!ktype->match || !ktype->instantiate)
goto error_2;
+ keyring = key_ref_to_ptr(keyring_ref);
+
+ key_check(keyring);
+
+ down_write(&keyring->sem);
+
+ /* if we're going to allocate a new key, we're going to have
+ * to modify the keyring */
+ ret = key_permission(keyring_ref, KEY_WRITE);
+ if (ret < 0) {
+ key_ref = ERR_PTR(ret);
+ goto error_3;
+ }
+
/* search for an existing key of the same type and description in the
* destination keyring
*/
- down_write(&keyring->sem);
-
- key = __keyring_search_one(keyring, ktype, description, 0);
- if (!IS_ERR(key))
+ key_ref = __keyring_search_one(keyring_ref, ktype, description, 0);
+ if (!IS_ERR(key_ref))
goto found_matching_key;
- /* if we're going to allocate a new key, we're going to have to modify
- * the keyring */
- ret = -EACCES;
- if (!key_permission(keyring, KEY_WRITE))
- goto error_3;
-
/* decide on the permissions we want */
- perm = KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK;
+ perm = KEY_POS_VIEW | KEY_POS_SEARCH | KEY_POS_LINK | KEY_POS_SETATTR;
+ perm |= KEY_USR_VIEW | KEY_USR_SEARCH | KEY_USR_LINK | KEY_USR_SETATTR;
if (ktype->read)
- perm |= KEY_USR_READ;
+ perm |= KEY_POS_READ | KEY_USR_READ;
if (ktype == &key_type_keyring || ktype->update)
perm |= KEY_USR_WRITE;
key = key_alloc(ktype, description, current->fsuid, current->fsgid,
perm, not_in_quota);
if (IS_ERR(key)) {
- ret = PTR_ERR(key);
+ key_ref = ERR_PTR(PTR_ERR(key));
goto error_3;
}
ret = __key_instantiate_and_link(key, payload, plen, keyring, NULL);
if (ret < 0) {
key_put(key);
- key = ERR_PTR(ret);
+ key_ref = ERR_PTR(ret);
+ goto error_3;
}
+ key_ref = make_key_ref(key, is_key_possessed(keyring_ref));
+
error_3:
up_write(&keyring->sem);
error_2:
key_type_put(ktype);
error:
- return key;
+ return key_ref;
found_matching_key:
/* we found a matching key, so we're going to try to update it
up_write(&keyring->sem);
key_type_put(ktype);
- key = __key_update(key, payload, plen);
+ key_ref = __key_update(key_ref, payload, plen);
goto error;
} /* end key_create_or_update() */
/*
* update a key
*/
-int key_update(struct key *key, const void *payload, size_t plen)
+int key_update(key_ref_t key_ref, const void *payload, size_t plen)
{
+ struct key *key = key_ref_to_ptr(key_ref);
int ret;
key_check(key);
/* the key must be writable */
- ret = -EACCES;
- if (!key_permission(key, KEY_WRITE))
+ ret = key_permission(key_ref, KEY_WRITE);
+ if (ret < 0)
goto error;
/* attempt to update it if supported */
ret = -EOPNOTSUPP;
if (key->type->update) {
down_write(&key->sem);
- ret = key->type->update(key, payload, plen);
+ ret = key->type->update(key, payload, plen);
if (ret == 0)
/* updating a negative key instantiates it */
clear_bit(KEY_FLAG_NEGATIVE, &key->flags);
projects / powerpc.git / blobdiff