evm: crypto hash replaced by shash

Using shash is more efficient, because the algorithm is allocated only
once. Only the descriptor to store the hash state needs to be allocated
for every operation.

Changelog v6:
- check for crypto_shash_setkey failure

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/security/integrity/evm/evm.h b/security/integrity/evm/evm.h
index a45d0d630a30..d320f5197437 100644
--- a/security/integrity/evm/evm.h
+++ b/security/integrity/evm/evm.h
@@ -19,6 +19,8 @@
 extern int evm_initialized;
 extern char *evm_hmac;
 
+extern struct crypto_shash *hmac_tfm;
+
 /* List of EVM protected security xattrs */
 extern char *evm_config_xattrnames[];