Commit 5b635e28 authored Jul 06, 2014 by Stephan Mueller Committed by Herbert Xu Jul 08, 2014

crypto: drbg - HMAC-SHA1 DRBG has crypto strength of 128 bits



The patch corrects the security strength of the HMAC-SHA1 DRBG to 128
bits. This strength defines the size of the seed required for the DRBG.
Thus, the patch lowers the seeding requirement from 256 bits to 128 bits
for HMAC-SHA1.

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

parent 27e4de2b

crypto/drbg.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -184,7 +184,7 @@ static const struct drbg_core drbg_cores[] = {
		#endif /* CONFIG_CRYPTO_DRBG_HASH */
		#ifdef CONFIG_CRYPTO_DRBG_HMAC
		{
		.flags = DRBG_HMAC \| DRBG_STRENGTH256,
		.flags = DRBG_HMAC \| DRBG_STRENGTH128,
		.statelen = 20, /* block length of cipher */
		.max_addtllen = 35,
		.max_bits = 19,