diff options
Diffstat (limited to 'security/keys/keyctl.c')
| -rw-r--r-- | security/keys/keyctl.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index b7a468fabdf9..299f0ae11cf0 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -967,6 +967,46 @@ long keyctl_set_reqkey_keyring(int reqkey_defl) /*****************************************************************************/ /* + * set or clear the timeout for a key + */ +long keyctl_set_timeout(key_serial_t id, unsigned timeout) +{ + struct timespec now; + struct key *key; + key_ref_t key_ref; + time_t expiry; + long ret; + + key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR); + if (IS_ERR(key_ref)) { + ret = PTR_ERR(key_ref); + goto error; + } + + key = key_ref_to_ptr(key_ref); + + /* make the changes with the locks held to prevent races */ + down_write(&key->sem); + + expiry = 0; + if (timeout > 0) { + now = current_kernel_time(); + expiry = now.tv_sec + timeout; + } + + key->expiry = expiry; + + up_write(&key->sem); + key_put(key); + + ret = 0; +error: + return ret; + +} /* end keyctl_set_timeout() */ + +/*****************************************************************************/ +/* * the key control system call */ asmlinkage long sys_keyctl(int option, unsigned long arg2, unsigned long arg3, @@ -1038,6 +1078,10 @@ asmlinkage long sys_keyctl(int option, unsigned long arg2, unsigned long arg3, case KEYCTL_SET_REQKEY_KEYRING: return keyctl_set_reqkey_keyring(arg2); + case KEYCTL_SET_TIMEOUT: + return keyctl_set_timeout((key_serial_t) arg2, + (unsigned) arg3); + default: return -EOPNOTSUPP; } |