From patchwork Thu Mar 5 16:46:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 446812 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 75D841400B6 for ; Fri, 6 Mar 2015 04:06:42 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45B891A0B7E for ; Fri, 6 Mar 2015 04:06:42 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mailhub1.si.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by lists.ozlabs.org (Postfix) with ESMTP id 672A71A0310 for ; Fri, 6 Mar 2015 03:46:24 +1100 (AEDT) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id BE2781C833C; Thu, 5 Mar 2015 17:46:22 +0100 (CET) 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 lrnh84rzpXNA; Thu, 5 Mar 2015 17:46:22 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 81C651C833E; Thu, 5 Mar 2015 17:46:22 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id C8440C73C8; Thu, 5 Mar 2015 17:46:21 +0100 (CET) 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 hKb_IdTzvj73; Thu, 5 Mar 2015 17:46:21 +0100 (CET) Received: from PO10863.localdomain (unknown [172.25.231.75]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 3BCB0C73C4; Thu, 5 Mar 2015 17:46:16 +0100 (CET) Received: by localhost.localdomain (Postfix, from userid 0) id 554531A242A; Thu, 5 Mar 2015 17:46:07 +0100 (CET) From: Christophe Leroy To: Kim Phillips , Herbert Xu , "David S. Miller" Subject: [PATCH 16/17] crypto: talitos - SEC1 bugs on 0 data hash Message-Id: <20150305164607.554531A242A@localhost.localdomain> Date: Thu, 5 Mar 2015 17:46:07 +0100 (CET) Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 | 3 +++ drivers/crypto/talitos1.c | 21 +++++++++++++++++++++ drivers/crypto/talitos1.h | 4 ++++ drivers/crypto/talitos2.h | 6 ++++++ 4 files changed, 34 insertions(+) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 112a25a..464338c 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -817,6 +817,9 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, to_talitos_next_desc_clear(desc); + if (desc->ptr[3].len == 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); diff --git a/drivers/crypto/talitos1.c b/drivers/crypto/talitos1.c index c1a8e9e..1edaa68 100644 --- a/drivers/crypto/talitos1.c +++ b/drivers/crypto/talitos1.c @@ -174,3 +174,24 @@ void talitos_error(struct device *dev, u32 isr, u32 isr_lo) talitos_init_device(dev); } } + +/* + * 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, 0, DMA_TO_DEVICE); +} diff --git a/drivers/crypto/talitos1.h b/drivers/crypto/talitos1.h index f78d89d..a9e0619 100644 --- a/drivers/crypto/talitos1.h +++ b/drivers/crypto/talitos1.h @@ -277,6 +277,10 @@ static inline void ahash_process_chain(struct scatterlist *src, int nbytes, } } +extern void talitos_handle_buggy_hash(struct talitos_ctx *ctx, + struct talitos_edesc *edesc, + struct talitos_ptr *ptr); + #define DEF_TALITOS_DONE(name, ch_done_mask) \ static void talitos_done_##name(unsigned long data) \ { \ diff --git a/drivers/crypto/talitos2.h b/drivers/crypto/talitos2.h index 2715c72..de0c8f4 100644 --- a/drivers/crypto/talitos2.h +++ b/drivers/crypto/talitos2.h @@ -266,6 +266,12 @@ static inline void ahash_process_chain(struct scatterlist *src, int nbytes, req_ctx->psrc = src; } +static inline void talitos_handle_buggy_hash(struct talitos_ctx *ctx, + struct talitos_edesc *edesc, + struct talitos_ptr *ptr) +{ +} + #define DEF_TALITOS_DONE(name, ch_done_mask) \ static void talitos_done_##name(unsigned long data) \ { \