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| author | David Howells <dhowells@redhat.com> | 2006-01-08 01:02:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:13:53 -0800 |
| commit | 017679c4d45783158dba1dd6f79e712c22bb3d9a (patch) | |
| tree | a536f0b581eacd88a64077f5ff15b29d23fc6405 /security/keys | |
| parent | cd140a5c1f456f50897af4a2e9a23d228a5fe719 (diff) | |
| download | linux-3.10-017679c4d45783158dba1dd6f79e712c22bb3d9a.tar.gz linux-3.10-017679c4d45783158dba1dd6f79e712c22bb3d9a.tar.bz2 linux-3.10-017679c4d45783158dba1dd6f79e712c22bb3d9a.zip | |
[PATCH] keys: Permit key expiry time to be set
Add a new keyctl function that allows the expiry time to be set on a key or
removed from a key, provided the caller has attribute modification access.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Alexander Zangerl <az@bond.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security/keys')
| -rw-r--r-- | security/keys/compat.c | 3 | ||||
| -rw-r--r-- | security/keys/internal.h | 1 | ||||
| -rw-r--r-- | security/keys/keyctl.c | 44 |
3 files changed, 48 insertions, 0 deletions
diff --git a/security/keys/compat.c b/security/keys/compat.c index 3303673c636..e8e7ef4a290 100644 --- a/security/keys/compat.c +++ b/security/keys/compat.c @@ -74,6 +74,9 @@ asmlinkage long compat_sys_keyctl(u32 option, case KEYCTL_SET_REQKEY_KEYRING: return keyctl_set_reqkey_keyring(arg2); + case KEYCTL_SET_TIMEOUT: + return keyctl_set_timeout(arg2, arg3); + default: return -EOPNOTSUPP; } diff --git a/security/keys/internal.h b/security/keys/internal.h index 39cba97c5eb..51f37c0bdb3 100644 --- a/security/keys/internal.h +++ b/security/keys/internal.h @@ -136,6 +136,7 @@ extern long keyctl_instantiate_key(key_serial_t, const void __user *, size_t, key_serial_t); extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t); extern long keyctl_set_reqkey_keyring(int); +extern long keyctl_set_timeout(key_serial_t, unsigned); /* diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index b7a468fabdf..299f0ae11cf 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; } |