From patchwork Thu Apr 16 13:24:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 227601 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 4D590C352BE for ; Thu, 16 Apr 2020 15:37:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 288DB214AF for ; Thu, 16 Apr 2020 15:37:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587051435; bh=HgRYTwaT0K3i6R4yyE0ffxtTm8sNUE/pRjIWBN7QiJ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=f8qglrzh8SjDkVfNi1bojnT3cRbhtWkNPsNBCtC1USo9daxc8EwL3LqtTzOcIXQBf ExpQTs3h8d+4z1+YbEljOxzM3TxnFHmWEO8qgZ64WGAVQLPV3ql+Z+iwqGfbE9ZdbA hbKsMcdfCbnC2tYYQEtou287aC8BbroNYWjCUtko= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2897978AbgDPNjf (ORCPT ); Thu, 16 Apr 2020 09:39:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:51938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2897976AbgDPNjd (ORCPT ); Thu, 16 Apr 2020 09:39:33 -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 67A5D20786; Thu, 16 Apr 2020 13:39:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044372; bh=HgRYTwaT0K3i6R4yyE0ffxtTm8sNUE/pRjIWBN7QiJ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YHMphaOCJALqXRA6HM7daI6AK6I7WQKSM90RJhZaDY0Ou0en40X8vo1uyIZ2Uibgo ndGB/9sLCgru1o28UGryKZrp+6huTPXKBANg4NI9/G8ATAaSQ0zZRbQ7fFZvEY+BhD G7GbtISTM4PrVHr24AXQKw6juqvxil021MRqQrnM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?Horia_Geant=C4=83?= , Valentin Ciocoi Radulescu , Herbert Xu Subject: [PATCH 5.5 190/257] crypto: caam/qi2 - fix chacha20 data size error Date: Thu, 16 Apr 2020 15:24:01 +0200 Message-Id: <20200416131350.027267421@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131325.891903893@linuxfoundation.org> References: <20200416131325.891903893@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Horia Geantă commit 3a5a9e1ef37b030b836d92df8264f840988f4a38 upstream. HW generates a Data Size error for chacha20 requests that are not a multiple of 64B, since algorithm state (AS) does not have the FINAL bit set. Since updating req->iv (for chaining) is not required, modify skcipher descriptors to set the FINAL bit for chacha20. [Note that for skcipher decryption we know that ctx1_iv_off is 0, which allows for an optimization by not checking algorithm type, since append_dec_op1() sets FINAL bit for all algorithms except AES.] Also drop the descriptor operations that save the IV. However, in order to keep code logic simple, things like S/G tables generation etc. are not touched. Cc: # v5.3+ Fixes: 334d37c9e263 ("crypto: caam - update IV using HW support") Signed-off-by: Horia Geantă Tested-by: Valentin Ciocoi Radulescu Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/caam/caamalg_desc.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) --- a/drivers/crypto/caam/caamalg_desc.c +++ b/drivers/crypto/caam/caamalg_desc.c @@ -1379,6 +1379,9 @@ void cnstr_shdsc_skcipher_encap(u32 * co const u32 ctx1_iv_off) { u32 *key_jump_cmd; + u32 options = cdata->algtype | OP_ALG_AS_INIT | OP_ALG_ENCRYPT; + bool is_chacha20 = ((cdata->algtype & OP_ALG_ALGSEL_MASK) == + OP_ALG_ALGSEL_CHACHA20); init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ @@ -1417,14 +1420,15 @@ void cnstr_shdsc_skcipher_encap(u32 * co LDST_OFFSET_SHIFT)); /* Load operation */ - append_operation(desc, cdata->algtype | OP_ALG_AS_INIT | - OP_ALG_ENCRYPT); + if (is_chacha20) + options |= OP_ALG_AS_FINALIZE; + append_operation(desc, options); /* Perform operation */ skcipher_append_src_dst(desc); /* Store IV */ - if (ivsize) + if (!is_chacha20 && ivsize) append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT)); @@ -1451,6 +1455,8 @@ void cnstr_shdsc_skcipher_decap(u32 * co const u32 ctx1_iv_off) { u32 *key_jump_cmd; + bool is_chacha20 = ((cdata->algtype & OP_ALG_ALGSEL_MASK) == + OP_ALG_ALGSEL_CHACHA20); init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX); /* Skip if already shared */ @@ -1499,7 +1505,7 @@ void cnstr_shdsc_skcipher_decap(u32 * co skcipher_append_src_dst(desc); /* Store IV */ - if (ivsize) + if (!is_chacha20 && ivsize) append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT | LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));