From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751262AbaGFAfa (ORCPT ); Sat, 5 Jul 2014 20:35:30 -0400 Received: from mail.eperm.de ([89.247.134.16]:53334 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750948AbaGFAf3 (ORCPT ); Sat, 5 Jul 2014 20:35:29 -0400 X-AuthUser: sm@eperm.de From: Stephan Mueller To: herbert@gondor.apana.org.au Cc: joe@perches.com, dan.carpenter@oracle.com, Stephen Rothwell , fengguang.wu@intel.com, Randy Dunlap , linux-crypto@vger.kernel.org, linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Rafael Aquini , aris@redhat.com Subject: [PATCH 6/6] DRBG: HMAC-SHA1 DRBG has crypto strength of 128 bits Date: Sun, 06 Jul 2014 02:26:37 +0200 Message-ID: <2038501.NQxD5ZZc1H@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: <2266932.bfVPMOTOeI@myon.chronox.de> References: <2266932.bfVPMOTOeI@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 a76b3cb..84478cb 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, -- 1.9.3