/*
* install user and user session keyrings for a particular UID
*/
-static int install_user_keyrings(struct task_struct *tsk)
+int install_user_keyrings(void)
{
- struct user_struct *user = tsk->user;
+ struct user_struct *user = current->cred->user;
struct key *uid_keyring, *session_keyring;
char buf[20];
int ret;
uid_keyring = find_keyring_by_name(buf, true);
if (IS_ERR(uid_keyring)) {
uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1,
- tsk, KEY_ALLOC_IN_QUOTA,
+ current, KEY_ALLOC_IN_QUOTA,
NULL);
if (IS_ERR(uid_keyring)) {
ret = PTR_ERR(uid_keyring);
if (IS_ERR(session_keyring)) {
session_keyring =
keyring_alloc(buf, user->uid, (gid_t) -1,
- tsk, KEY_ALLOC_IN_QUOTA, NULL);
+ current, KEY_ALLOC_IN_QUOTA,
+ NULL);
if (IS_ERR(session_keyring)) {
ret = PTR_ERR(session_keyring);
goto error_release;
/*
* install a fresh thread keyring, discarding the old one
*/
-int install_thread_keyring(struct task_struct *tsk)
+int install_thread_keyring(void)
{
+ struct task_struct *tsk = current;
struct key *keyring, *old;
char buf[20];
int ret;
sprintf(buf, "_tid.%u", tsk->pid);
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ keyring = keyring_alloc(buf, tsk->cred->uid, tsk->cred->gid, tsk,
KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
}
task_lock(tsk);
- old = tsk->thread_keyring;
- tsk->thread_keyring = keyring;
+ old = tsk->cred->thread_keyring;
+ tsk->cred->thread_keyring = keyring;
task_unlock(tsk);
ret = 0;
/*
* make sure a process keyring is installed
*/
-int install_process_keyring(struct task_struct *tsk)
+int install_process_keyring(void)
{
+ struct task_struct *tsk = current;
struct key *keyring;
char buf[20];
int ret;
if (!tsk->signal->process_keyring) {
sprintf(buf, "_pid.%u", tsk->tgid);
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ keyring = keyring_alloc(buf, tsk->cred->uid, tsk->cred->gid, tsk,
KEY_ALLOC_QUOTA_OVERRUN, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
* install a session keyring, discarding the old one
* - if a keyring is not supplied, an empty one is invented
*/
-static int install_session_keyring(struct task_struct *tsk,
- struct key *keyring)
+static int install_session_keyring(struct key *keyring)
{
+ struct task_struct *tsk = current;
unsigned long flags;
struct key *old;
char buf[20];
if (tsk->signal->session_keyring)
flags = KEY_ALLOC_IN_QUOTA;
- keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
+ keyring = keyring_alloc(buf, tsk->cred->uid, tsk->cred->gid, tsk,
flags, NULL);
if (IS_ERR(keyring))
return PTR_ERR(keyring);
*/
int copy_keys(unsigned long clone_flags, struct task_struct *tsk)
{
- key_check(tsk->thread_keyring);
- key_check(tsk->request_key_auth);
+ key_check(tsk->cred->thread_keyring);
+ key_check(tsk->cred->request_key_auth);
/* no thread keyring yet */
- tsk->thread_keyring = NULL;
+ tsk->cred->thread_keyring = NULL;
/* copy the request_key() authorisation for this thread */
- key_get(tsk->request_key_auth);
+ key_get(tsk->cred->request_key_auth);
return 0;
*/
void exit_keys(struct task_struct *tsk)
{
- key_put(tsk->thread_keyring);
- key_put(tsk->request_key_auth);
+ key_put(tsk->cred->thread_keyring);
+ key_put(tsk->cred->request_key_auth);
} /* end exit_keys() */
/* newly exec'd tasks don't get a thread keyring */
task_lock(tsk);
- old = tsk->thread_keyring;
- tsk->thread_keyring = NULL;
+ old = tsk->cred->thread_keyring;
+ tsk->cred->thread_keyring = NULL;
task_unlock(tsk);
key_put(old);
void key_fsuid_changed(struct task_struct *tsk)
{
/* update the ownership of the thread keyring */
- if (tsk->thread_keyring) {
- down_write(&tsk->thread_keyring->sem);
- tsk->thread_keyring->uid = tsk->fsuid;
- up_write(&tsk->thread_keyring->sem);
+ BUG_ON(!tsk->cred);
+ if (tsk->cred->thread_keyring) {
+ down_write(&tsk->cred->thread_keyring->sem);
+ tsk->cred->thread_keyring->uid = tsk->cred->fsuid;
+ up_write(&tsk->cred->thread_keyring->sem);
}
} /* end key_fsuid_changed() */
void key_fsgid_changed(struct task_struct *tsk)
{
/* update the ownership of the thread keyring */
- if (tsk->thread_keyring) {
- down_write(&tsk->thread_keyring->sem);
- tsk->thread_keyring->gid = tsk->fsgid;
- up_write(&tsk->thread_keyring->sem);
+ BUG_ON(!tsk->cred);
+ if (tsk->cred->thread_keyring) {
+ down_write(&tsk->cred->thread_keyring->sem);
+ tsk->cred->thread_keyring->gid = tsk->cred->fsgid;
+ up_write(&tsk->cred->thread_keyring->sem);
}
} /* end key_fsgid_changed() */
err = ERR_PTR(-EAGAIN);
/* search the thread keyring first */
- if (context->thread_keyring) {
+ if (context->cred->thread_keyring) {
key_ref = keyring_search_aux(
- make_key_ref(context->thread_keyring, 1),
+ make_key_ref(context->cred->thread_keyring, 1),
context, type, description, match);
if (!IS_ERR(key_ref))
goto found;
}
}
/* or search the user-session keyring */
- else if (context->user->session_keyring) {
+ else if (context->cred->user->session_keyring) {
key_ref = keyring_search_aux(
- make_key_ref(context->user->session_keyring, 1),
+ make_key_ref(context->cred->user->session_keyring, 1),
context, type, description, match);
if (!IS_ERR(key_ref))
goto found;
* search the keyrings of the process mentioned there
* - we don't permit access to request_key auth keys via this method
*/
- if (context->request_key_auth &&
+ if (context->cred->request_key_auth &&
context == current &&
type != &key_type_request_key_auth
) {
/* defend against the auth key being revoked */
- down_read(&context->request_key_auth->sem);
+ down_read(&context->cred->request_key_auth->sem);
- if (key_validate(context->request_key_auth) == 0) {
- rka = context->request_key_auth->payload.data;
+ if (key_validate(context->cred->request_key_auth) == 0) {
+ rka = context->cred->request_key_auth->payload.data;
key_ref = search_process_keyrings(type, description,
match, rka->context);
- up_read(&context->request_key_auth->sem);
+ up_read(&context->cred->request_key_auth->sem);
if (!IS_ERR(key_ref))
goto found;
break;
}
} else {
- up_read(&context->request_key_auth->sem);
+ up_read(&context->cred->request_key_auth->sem);
}
}
* - don't create special keyrings unless so requested
* - partially constructed keys aren't found unless requested
*/
-key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
- int create, int partial, key_perm_t perm)
+key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
+ key_perm_t perm)
{
- key_ref_t key_ref, skey_ref;
+ struct request_key_auth *rka;
+ struct task_struct *t = current;
+ struct cred *cred = t->cred;
struct key *key;
+ key_ref_t key_ref, skey_ref;
int ret;
- if (!context)
- context = current;
-
key_ref = ERR_PTR(-ENOKEY);
switch (id) {
case KEY_SPEC_THREAD_KEYRING:
- if (!context->thread_keyring) {
+ if (!cred->thread_keyring) {
if (!create)
goto error;
- ret = install_thread_keyring(context);
+ ret = install_thread_keyring();
if (ret < 0) {
key = ERR_PTR(ret);
goto error;
}
}
- key = context->thread_keyring;
+ key = cred->thread_keyring;
atomic_inc(&key->usage);
key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_PROCESS_KEYRING:
- if (!context->signal->process_keyring) {
+ if (!t->signal->process_keyring) {
if (!create)
goto error;
- ret = install_process_keyring(context);
+ ret = install_process_keyring();
if (ret < 0) {
key = ERR_PTR(ret);
goto error;
}
}
- key = context->signal->process_keyring;
+ key = t->signal->process_keyring;
atomic_inc(&key->usage);
key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_SESSION_KEYRING:
- if (!context->signal->session_keyring) {
+ if (!t->signal->session_keyring) {
/* always install a session keyring upon access if one
* doesn't exist yet */
- ret = install_user_keyrings(context);
+ ret = install_user_keyrings();
if (ret < 0)
goto error;
ret = install_session_keyring(
- context, context->user->session_keyring);
+ cred->user->session_keyring);
if (ret < 0)
goto error;
}
rcu_read_lock();
- key = rcu_dereference(context->signal->session_keyring);
+ key = rcu_dereference(t->signal->session_keyring);
atomic_inc(&key->usage);
rcu_read_unlock();
key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_USER_KEYRING:
- if (!context->user->uid_keyring) {
- ret = install_user_keyrings(context);
+ if (!cred->user->uid_keyring) {
+ ret = install_user_keyrings();
if (ret < 0)
goto error;
}
- key = context->user->uid_keyring;
+ key = cred->user->uid_keyring;
atomic_inc(&key->usage);
key_ref = make_key_ref(key, 1);
break;
case KEY_SPEC_USER_SESSION_KEYRING:
- if (!context->user->session_keyring) {
- ret = install_user_keyrings(context);
+ if (!cred->user->session_keyring) {
+ ret = install_user_keyrings();
if (ret < 0)
goto error;
}
- key = context->user->session_keyring;
+ key = cred->user->session_keyring;
atomic_inc(&key->usage);
key_ref = make_key_ref(key, 1);
break;
goto error;
case KEY_SPEC_REQKEY_AUTH_KEY:
- key = context->request_key_auth;
+ key = cred->request_key_auth;
if (!key)
goto error;
key_ref = make_key_ref(key, 1);
break;
+ case KEY_SPEC_REQUESTOR_KEYRING:
+ if (!cred->request_key_auth)
+ goto error;
+
+ down_read(&cred->request_key_auth->sem);
+ if (cred->request_key_auth->flags & KEY_FLAG_REVOKED) {
+ key_ref = ERR_PTR(-EKEYREVOKED);
+ key = NULL;
+ } else {
+ rka = cred->request_key_auth->payload.data;
+ key = rka->dest_keyring;
+ atomic_inc(&key->usage);
+ }
+ up_read(&cred->request_key_auth->sem);
+ if (!key)
+ goto error;
+ key_ref = make_key_ref(key, 1);
+ break;
+
default:
key_ref = ERR_PTR(-EINVAL);
if (id < 1)
goto invalid_key;
/* check the permissions */
- ret = key_task_permission(key_ref, context, perm);
+ ret = key_task_permission(key_ref, t, perm);
if (ret < 0)
goto invalid_key;
/* if no name is provided, install an anonymous keyring */
if (!name) {
- ret = install_session_keyring(tsk, NULL);
+ ret = install_session_keyring(NULL);
if (ret < 0)
goto error;
keyring = find_keyring_by_name(name, false);
if (PTR_ERR(keyring) == -ENOKEY) {
/* not found - try and create a new one */
- keyring = keyring_alloc(name, tsk->uid, tsk->gid, tsk,
+ keyring = keyring_alloc(name, tsk->cred->uid, tsk->cred->gid, tsk,
KEY_ALLOC_IN_QUOTA, NULL);
if (IS_ERR(keyring)) {
ret = PTR_ERR(keyring);
}
/* we've got a keyring - now to install it */
- ret = install_session_keyring(tsk, keyring);
+ ret = install_session_keyring(keyring);
if (ret < 0)
goto error2;
projects / linux-2.6-block.git / blobdiff