From 5b635e280efce5b735042c7ffa2487c4ba8fb4bf Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Sun, 6 Jul 2014 02:26:37 +0200 Subject: [PATCH] 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 Signed-off-by: Herbert Xu --- crypto/drbg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/drbg.c b/crypto/drbg.c index a76b3cb03cf4..84478cb8d02a 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -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, -- 2.34.1