xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KEYS: Convert KEYCTL_DH_COMPUTE to use the crypto KPP API

Browse Source 
The initial Diffie-Hellman computation made direct use of the MPI
library because the crypto module did not support DH at the time. Now
that KPP is implemented, KEYCTL_DH_COMPUTE should use it to get rid of
duplicate code and leverage possible hardware acceleration.

This fixes an issue whereby the input to the KDF computation would
include additional uninitialized memory when the result of the
Diffie-Hellman computation was shorter than the input prime number.

Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
This commit is contained in:
Mat Martineau
2017-06-08 14:50:11 +01:00
committed by James Morris
parent da7798a7b6
commit 7cbe0932c2
2 changed files with 177 additions and 109 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
security/keys/Kconfig
View File

@@ -93,9 +93,9 @@ config ENCRYPTED_KEYS
config KEY_DH_OPERATIONS
bool "Diffie-Hellman operations on retained keys"
depends on KEYS
select MPILIB
select CRYPTO
select CRYPTO_HASH
select CRYPTO_DH
help
This option provides support for calculating Diffie-Hellman
public keys and shared secrets using values stored as keys