From patchwork Fri Apr 17 14:32:18 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 6233701 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Original-To: patchwork-linux-crypto@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2BC49BF4A6 for ; Fri, 17 Apr 2015 14:33:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A7560202E5 for ; Fri, 17 Apr 2015 14:33:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B907820260 for ; Fri, 17 Apr 2015 14:33:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934546AbbDQOcX (ORCPT ); Fri, 17 Apr 2015 10:32:23 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:42183 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934540AbbDQOcU (ORCPT ); Fri, 17 Apr 2015 10:32:20 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 74C601C809B; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from mailhub1.si.c-s.fr ([192.168.12.234]) by localhost (mailhub1.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RJOv1jYXBJg1; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 5A3041C808B; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 4BCF5C73C8; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id 9Gl4U3OcIgsO; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) Received: from PO10863.localdomain (unknown [10.25.205.191]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 24A4FC73C5; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) Received: by localhost.localdomain (Postfix, from userid 0) id 110F81A242C; Fri, 17 Apr 2015 16:32:18 +0200 (CEST) From: Christophe Leroy Subject: [PATCH v3 15/17] crypto: talitos - SEC1 bugs on 0 data hash To: Kim Phillips , Herbert Xu , David S Miller Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org Message-Id: <20150417143218.110F81A242C@localhost.localdomain> Date: Fri, 17 Apr 2015 16:32:18 +0200 (CEST) Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP SEC1 bugs on 0 data hash, so we submit an already padded block representing 0 data Signed-off-by: Christophe Leroy --- drivers/crypto/talitos.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index dddf4b3..f1406d7b 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1797,6 +1797,27 @@ static void ahash_done(struct device *dev, areq->base.complete(&areq->base, err); } +/* + * SEC1 doesn't like hashing of 0 sized message, so we do the padding + * ourself and submit a padded block + */ +void talitos_handle_buggy_hash(struct talitos_ctx *ctx, + struct talitos_edesc *edesc, + struct talitos_ptr *ptr) +{ + static u8 padded_hash[64] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + }; + + pr_err_once("Bug in SEC1, padding ourself\n"); + edesc->desc.hdr &= ~DESC_HDR_MODE0_MDEU_PAD; + map_single_talitos_ptr(ctx->dev, ptr, sizeof(padded_hash), + (char *)padded_hash, DMA_TO_DEVICE); +} + static int common_nonsnoop_hash(struct talitos_edesc *edesc, struct ahash_request *areq, unsigned int length, void (*callback) (struct device *dev, @@ -1857,6 +1878,9 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, /* last DWORD empty */ desc->ptr[6] = zero_entry; + if (is_sec1 && from_talitos_ptr_len(&desc->ptr[3], true) == 0) + talitos_handle_buggy_hash(ctx, edesc, &desc->ptr[3]); + ret = talitos_submit(dev, ctx->ch, desc, callback, areq); if (ret != -EINPROGRESS) { common_nonsnoop_hash_unmap(dev, edesc, areq);