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authorStephan Mueller <smueller@chronox.de>2016-05-26 23:38:12 +0200
committerJames Morris <james.l.morris@oracle.com>2016-06-03 16:14:34 +1000
commit4693fc734d675c5518ea9bd4c9623db45bc37402 (patch)
tree54dcf2388f5868c5d5a8ab4faf3b64a8e2fa4f79 /security/keys/keyctl.c
parent4340fa55298d17049e71c7a34e04647379c269f3 (diff)
KEYS: Add placeholder for KDF usage with DH
The values computed during Diffie-Hellman key exchange are often used in combination with key derivation functions to create cryptographic keys. Add a placeholder for a later implementation to configure a key derivation function that will transform the Diffie-Hellman result returned by the KEYCTL_DH_COMPUTE command. [This patch was stripped down from a patch produced by Mat Martineau that had a bug in the compat code - so for the moment Stephan's patch simply requires that the placeholder argument must be NULL] Original-signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security/keys/keyctl.c')
-rw-r--r--security/keys/keyctl.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 3b135a0af344..d580ad06b792 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1688,8 +1688,8 @@ SYSCALL_DEFINE5(keyctl, int, option, unsigned long, arg2, unsigned long, arg3,
case KEYCTL_DH_COMPUTE:
return keyctl_dh_compute((struct keyctl_dh_params __user *) arg2,
- (char __user *) arg3,
- (size_t) arg4);
+ (char __user *) arg3, (size_t) arg4,
+ (void __user *) arg5);
default:
return -EOPNOTSUPP;