tree f638837277d65abd82370e7749b3aecac569df99
parent 5318c53d5b4bbf097ccba2e74831d67e4d63b1a1
author Stephan Mueller <smueller@chronox.de> 1464693117 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> 1464863941 +0800

crypto: drbg - reduce number of setkey calls

The CTR DRBG code always set the key for each sym cipher invocation even
though the key has not been changed.

The patch ensures that the setkey is only invoked when a new key is
generated by the DRBG.

With this patch, the CTR DRBG performance increases by more than 150%.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>