From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6643AC32750 for ; Fri, 2 Aug 2019 09:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 357922064A for ; Fri, 2 Aug 2019 09:51:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564739489; bh=MJtsPeYNZsKq49rZtkuN6dD8y6BQyFpESZtcOqsy/lo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sJll7avIZamFPzQx+kQrcjgBNPBflKVY6TLhAbqEhN563Co/Y2iLyoTZZRrzXk2uQ JxfcmPwZZEXZeSVSD2yjgteYTeuzcyNGyF61sDw+n8YLPgUqEZI9Fgs8Y7VU7k94Go 2zog+4YwdxdlX8SlI4vwsekZ3/7gZkSJbLF0fCDw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405809AbfHBJv2 (ORCPT ); Fri, 2 Aug 2019 05:51:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:48116 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404070AbfHBJol (ORCPT ); Fri, 2 Aug 2019 05:44:41 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1D66A2171F; Fri, 2 Aug 2019 09:44:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564739080; bh=MJtsPeYNZsKq49rZtkuN6dD8y6BQyFpESZtcOqsy/lo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O9Bjhxo1Yqix4fbdkznM9p1Bc3Ffaa/xjO20X/2lWWmd+mqzq3bz1yKBJac7glwT9 +zGIPuRathZM88miCfz/MT0dxZvOLsXguwCJ8Ij9ihVwGhZhsCDk6RVr2d4Npkh7IX 3XXNTntOY9gtQHylU6uyiIUI1NuZEBI0rFApkptI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Elena Petrova , Ard Biesheuvel , Herbert Xu Subject: [PATCH 4.9 080/223] crypto: arm64/sha2-ce - correct digest for empty data in finup Date: Fri, 2 Aug 2019 11:35:05 +0200 Message-Id: <20190802092244.096277859@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190802092238.692035242@linuxfoundation.org> References: <20190802092238.692035242@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Elena Petrova commit 6bd934de1e393466b319d29c4427598fda096c57 upstream. The sha256-ce finup implementation for ARM64 produces wrong digest for empty input (len=0). Expected: the actual digest, result: initial value of SHA internal state. The error is in sha256_ce_finup: for empty data `finalize` will be 1, so the code is relying on sha2_ce_transform to make the final round. However, in sha256_base_do_update, the block function will not be called when len == 0. Fix it by setting finalize to 0 if data is empty. Fixes: 03802f6a80b3a ("crypto: arm64/sha2-ce - move SHA-224/256 ARMv8 implementation to base layer") Cc: stable@vger.kernel.org Signed-off-by: Elena Petrova Reviewed-by: Ard Biesheuvel Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- arch/arm64/crypto/sha2-ce-glue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm64/crypto/sha2-ce-glue.c +++ b/arch/arm64/crypto/sha2-ce-glue.c @@ -52,7 +52,7 @@ static int sha256_ce_finup(struct shash_ unsigned int len, u8 *out) { struct sha256_ce_state *sctx = shash_desc_ctx(desc); - bool finalize = !sctx->sst.count && !(len % SHA256_BLOCK_SIZE); + bool finalize = !sctx->sst.count && !(len % SHA256_BLOCK_SIZE) && len; /* * Allow the asm code to perform the finalization if there is no