From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758088AbaGAPLg (ORCPT ); Tue, 1 Jul 2014 11:11:36 -0400 Received: from mail.eperm.de ([89.247.134.16]:52680 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758056AbaGAPLe (ORCPT ); Tue, 1 Jul 2014 11:11:34 -0400 X-AuthUser: sm@eperm.de From: Stephan Mueller To: herbert@gondor.apana.org.au Cc: Rafael Aquini , aris@redhat.com, Fengguang Wu , Jet Chen , Su Tao , Yuanhan Liu , LKP , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] DRBG: HMAC-SHA1 DRBG has crypto strength of 128 bits Date: Tue, 01 Jul 2014 17:09:23 +0200 Message-ID: <3541308.zCk9jgdY1p@myon.chronox.de> User-Agent: KMail/4.12.5 (Linux/3.14.9-200.fc20.x86_64; KDE/4.12.5; x86_64; ; ) In-Reply-To: <36957559.tbJt1gJF6I@myon.chronox.de> References: <36957559.tbJt1gJF6I@myon.chronox.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- crypto/drbg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/drbg.c b/crypto/drbg.c index c2f02b7..e6c52e0 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -195,7 +195,7 @@ 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, -- 1.9.3