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authorStephan Mueller <smueller@chronox.de>2016-08-19 21:39:09 +0300
committerDavid Howells <dhowells@redhat.com>2017-04-05 00:33:38 +0300
commitf1c316a3ab9d24df6022682422fe897492f2c0c8 (patch)
tree369b53c45d1f0c2bbd4c6f745cb9a694e1b28cbe /security/keys/Makefile
parentf0df90cd7cf2f4a8195c3fff0d2f4c85088fd39c (diff)
downloadlinux-f1c316a3ab9d24df6022682422fe897492f2c0c8.tar.xz
KEYS: add SP800-56A KDF support for DH
SP800-56A defines the use of DH with key derivation function based on a counter. The input to the KDF is defined as (DH shared secret || other information). The value for the "other information" is to be provided by the caller. The KDF is implemented using the hash support from the kernel crypto API. The implementation uses the symmetric hash support as the input to the hash operation is usually very small. The caller is allowed to specify the hash name that he wants to use to derive the key material allowing the use of all supported hashes provided with the kernel crypto API. As the KDF implements the proper truncation of the DH shared secret to the requested size, this patch fills the caller buffer up to its size. The patch is tested with a new test added to the keyutils user space code which uses a CAVS test vector testing the compliance with SP800-56A. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'security/keys/Makefile')
-rw-r--r--security/keys/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/security/keys/Makefile b/security/keys/Makefile
index 1fd4a16e6daf..57dff0c15809 100644
--- a/security/keys/Makefile
+++ b/security/keys/Makefile
@@ -15,7 +15,8 @@ obj-y := \
request_key.o \
request_key_auth.o \
user_defined.o
-obj-$(CONFIG_KEYS_COMPAT) += compat.o
+compat-obj-$(CONFIG_KEY_DH_OPERATIONS) += compat_dh.o
+obj-$(CONFIG_KEYS_COMPAT) += compat.o $(compat-obj-y)
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_SYSCTL) += sysctl.o
obj-$(CONFIG_PERSISTENT_KEYRINGS) += persistent.o