From patchwork Tue May 21 13:34:17 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 10953715 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E597C933 for ; Tue, 21 May 2019 13:34:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D4AA028830 for ; Tue, 21 May 2019 13:34:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C8134289B8; Tue, 21 May 2019 13:34:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63AD828830 for ; Tue, 21 May 2019 13:34:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728495AbfEUNeU (ORCPT ); Tue, 21 May 2019 09:34:20 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:63477 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728478AbfEUNeT (ORCPT ); Tue, 21 May 2019 09:34:19 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 457cDm1T9Qz9v2XY; Tue, 21 May 2019 15:34:16 +0200 (CEST) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=ticG2/lY; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id dFK9IUwmY9LA; Tue, 21 May 2019 15:34:16 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 457cDm0Ny0z9v2Xf; Tue, 21 May 2019 15:34:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1558445656; bh=TWP1VL/ELSGNgIfJBuTbhQmJ3wF1WuIsfR7TTEfE+Ck=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=ticG2/lYg1espekUAkEJFsXFcLbBLGHJsk0y6ZjFxLJV5QNXHcxLI0Jo9NmWT4pT/ oZdWkClzWbCeXr0+h/cctB5zw3doknGT5aMeOTG46B/o9PEx0v5/0bpwkmGFxI4FYf Ayadr9BiIZk5+enBTdZfCpxlUa2YTy3hTbUV9028= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 723088B803; Tue, 21 May 2019 15:34:17 +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 6LPi8hhLSWRl; Tue, 21 May 2019 15:34:17 +0200 (CEST) Received: from po16846vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 2D7AB8B80D; Tue, 21 May 2019 15:34:17 +0200 (CEST) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 060A968479; Tue, 21 May 2019 13:34:17 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v1 10/15] crypto: talitos - properly handle split ICV. To: Herbert Xu , "David S. Miller" , horia.geanta@nxp.com Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Date: Tue, 21 May 2019 13:34:17 +0000 (UTC) Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The driver assumes that the ICV is as a single piece in the last element of the scatterlist. This assumption is wrong. This patch ensures that the ICV is properly handled regardless of the scatterlist layout. Fixes: 9c4a79653b35 ("crypto: talitos - Freescale integrated security engine (SEC) driver") Signed-off-by: Christophe Leroy --- drivers/crypto/talitos.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index e35581d67315..7c8a3a717b91 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1069,7 +1069,6 @@ static void ipsec_esp_encrypt_done(struct device *dev, unsigned int authsize = crypto_aead_authsize(authenc); unsigned int ivsize = crypto_aead_ivsize(authenc); struct talitos_edesc *edesc; - struct scatterlist *sg; void *icvdata; edesc = container_of(desc, struct talitos_edesc, desc); @@ -1083,9 +1082,8 @@ static void ipsec_esp_encrypt_done(struct device *dev, else icvdata = &edesc->link_tbl[edesc->src_nents + edesc->dst_nents + 2]; - sg = sg_last(areq->dst, edesc->dst_nents); - memcpy((char *)sg_virt(sg) + sg->length - authsize, - icvdata, authsize); + sg_pcopy_from_buffer(areq->dst, edesc->dst_nents ? : 1, icvdata, + authsize, areq->assoclen + areq->cryptlen); } dma_unmap_single(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE); @@ -1103,7 +1101,6 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, struct crypto_aead *authenc = crypto_aead_reqtfm(req); unsigned int authsize = crypto_aead_authsize(authenc); struct talitos_edesc *edesc; - struct scatterlist *sg; char *oicv, *icv; struct talitos_private *priv = dev_get_drvdata(dev); bool is_sec1 = has_ftr_sec1(priv); @@ -1113,9 +1110,18 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, ipsec_esp_unmap(dev, edesc, req, false); if (!err) { + char icvdata[SHA512_DIGEST_SIZE]; + int nents = edesc->dst_nents ? : 1; + unsigned int len = req->assoclen + req->cryptlen; + /* auth check */ - sg = sg_last(req->dst, edesc->dst_nents ? : 1); - icv = (char *)sg_virt(sg) + sg->length - authsize; + if (nents > 1) { + sg_pcopy_to_buffer(req->dst, nents, icvdata, authsize, + len - authsize); + icv = icvdata; + } else { + icv = (char *)sg_virt(req->dst) + len - authsize; + } if (edesc->dma_len) { if (is_sec1) @@ -1537,7 +1543,6 @@ static int aead_decrypt(struct aead_request *req) struct talitos_ctx *ctx = crypto_aead_ctx(authenc); struct talitos_private *priv = dev_get_drvdata(ctx->dev); struct talitos_edesc *edesc; - struct scatterlist *sg; void *icvdata; /* allocate extended descriptor */ @@ -1571,9 +1576,8 @@ static int aead_decrypt(struct aead_request *req) else icvdata = &edesc->link_tbl[0]; - sg = sg_last(req->src, edesc->src_nents ? : 1); - - memcpy(icvdata, (char *)sg_virt(sg) + sg->length - authsize, authsize); + sg_pcopy_to_buffer(req->src, edesc->src_nents ? : 1, icvdata, authsize, + req->assoclen + req->cryptlen - authsize); return ipsec_esp(edesc, req, false, ipsec_esp_decrypt_swauth_done); }