From ed0ac5c7ec3763e3261c48e3c5d4b7528b60fd85 Mon Sep 17 00:00:00 2001 From: David Howells Date: Mon, 20 May 2019 21:51:50 +0100 Subject: keys: Add a keyctl to move a key between keyrings Add a keyctl to atomically move a link to a key from one keyring to another. The key must exist in "from" keyring and a flag can be given to cause the operation to fail if there's a matching key already in the "to" keyring. This can be done with: keyctl(KEYCTL_MOVE, key_serial_t key, key_serial_t from_keyring, key_serial_t to_keyring, unsigned int flags); The key being moved must grant Link permission and both keyrings must grant Write permission. flags should be 0 or KEYCTL_MOVE_EXCL, with the latter preventing displacement of a matching key from the "to" keyring. Signed-off-by: David Howells --- security/keys/compat.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'security/keys/compat.c') diff --git a/security/keys/compat.c b/security/keys/compat.c index 9482df601dc3..b326bc4f84d7 100644 --- a/security/keys/compat.c +++ b/security/keys/compat.c @@ -159,6 +159,9 @@ COMPAT_SYSCALL_DEFINE5(keyctl, u32, option, return keyctl_pkey_verify(compat_ptr(arg2), compat_ptr(arg3), compat_ptr(arg4), compat_ptr(arg5)); + case KEYCTL_MOVE: + return keyctl_keyring_move(arg2, arg3, arg4, arg5); + default: return -EOPNOTSUPP; } -- cgit v1.2.3