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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 EA879C3B186 for ; Mon, 10 Feb 2020 12:53:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C4D6220708 for ; Mon, 10 Feb 2020 12:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581339186; bh=8PhorLcVVruykYZgtpPgsqnyXsagz0RSq9BrUyTTfug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YO8z1D1GJ6UIuchay66+uE83TOGH1k53PhvdsMnMAPFCWlwBaMWmjD9ODPozR+7Ny mfr34/w0TS7697+iuAZbo4lEMZXXxSHHG9/XuSy3BBMyWUWvW6a79tmaZDwR4gKdAo 0IIyv16tfTIzLUWe2wE45iIwzDrnJddYWdTIXM2M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729082AbgBJMwz (ORCPT ); Mon, 10 Feb 2020 07:52:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:46346 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730198AbgBJMmQ (ORCPT ); Mon, 10 Feb 2020 07:42:16 -0500 Received: from localhost (unknown [209.37.97.194]) (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 B111020661; Mon, 10 Feb 2020 12:42:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581338535; bh=8PhorLcVVruykYZgtpPgsqnyXsagz0RSq9BrUyTTfug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kIfxDvlY/cGm3lk9yv3+LWuJ8veRgK3GOevDeQYAY1WMNKTryEQqau/QFbL0ivXAD FydypoJ8fX2vZ7+NJIC95cBqydJjiHaXysqVQ/tbaiMI64XSc8oR3i8SChV8DX5YRI 1pZWdqvFRK019NZe//GsoI2J1ADLOCOEJEL3L3rQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tudor Ambarus , Herbert Xu , Sasha Levin Subject: [PATCH 5.5 363/367] crypto: atmel-aes - Fix saving of IV for CTR mode Date: Mon, 10 Feb 2020 04:34:36 -0800 Message-Id: <20200210122455.849290023@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200210122423.695146547@linuxfoundation.org> References: <20200210122423.695146547@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tudor Ambarus [ Upstream commit 371731ec2179d5810683406e7fc284b41b127df7 ] The req->iv of the skcipher_request is expected to contain the last used IV. Update the req->iv for CTR mode. Fixes: bd3c7b5c2aba ("crypto: atmel - add Atmel AES driver") Signed-off-by: Tudor Ambarus Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/atmel-aes.c | 43 +++++++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 12 deletions(-) diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 7b7079db2e860..ea9dcd7ce799b 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -121,6 +121,7 @@ struct atmel_aes_ctr_ctx { size_t offset; struct scatterlist src[2]; struct scatterlist dst[2]; + u16 blocks; }; struct atmel_aes_gcm_ctx { @@ -513,6 +514,26 @@ static void atmel_aes_set_iv_as_last_ciphertext_block(struct atmel_aes_dev *dd) } } +static inline struct atmel_aes_ctr_ctx * +atmel_aes_ctr_ctx_cast(struct atmel_aes_base_ctx *ctx) +{ + return container_of(ctx, struct atmel_aes_ctr_ctx, base); +} + +static void atmel_aes_ctr_update_req_iv(struct atmel_aes_dev *dd) +{ + struct atmel_aes_ctr_ctx *ctx = atmel_aes_ctr_ctx_cast(dd->ctx); + struct skcipher_request *req = skcipher_request_cast(dd->areq); + struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req); + unsigned int ivsize = crypto_skcipher_ivsize(skcipher); + int i; + + for (i = 0; i < ctx->blocks; i++) + crypto_inc((u8 *)ctx->iv, AES_BLOCK_SIZE); + + memcpy(req->iv, ctx->iv, ivsize); +} + static inline int atmel_aes_complete(struct atmel_aes_dev *dd, int err) { struct skcipher_request *req = skcipher_request_cast(dd->areq); @@ -527,8 +548,12 @@ static inline int atmel_aes_complete(struct atmel_aes_dev *dd, int err) dd->flags &= ~AES_FLAGS_BUSY; if (!dd->ctx->is_aead && - (rctx->mode & AES_FLAGS_OPMODE_MASK) != AES_FLAGS_ECB) - atmel_aes_set_iv_as_last_ciphertext_block(dd); + (rctx->mode & AES_FLAGS_OPMODE_MASK) != AES_FLAGS_ECB) { + if ((rctx->mode & AES_FLAGS_OPMODE_MASK) != AES_FLAGS_CTR) + atmel_aes_set_iv_as_last_ciphertext_block(dd); + else + atmel_aes_ctr_update_req_iv(dd); + } if (dd->is_async) dd->areq->complete(dd->areq, err); @@ -1007,12 +1032,6 @@ static int atmel_aes_start(struct atmel_aes_dev *dd) atmel_aes_transfer_complete); } -static inline struct atmel_aes_ctr_ctx * -atmel_aes_ctr_ctx_cast(struct atmel_aes_base_ctx *ctx) -{ - return container_of(ctx, struct atmel_aes_ctr_ctx, base); -} - static int atmel_aes_ctr_transfer(struct atmel_aes_dev *dd) { struct atmel_aes_ctr_ctx *ctx = atmel_aes_ctr_ctx_cast(dd->ctx); @@ -1020,7 +1039,7 @@ static int atmel_aes_ctr_transfer(struct atmel_aes_dev *dd) struct scatterlist *src, *dst; size_t datalen; u32 ctr; - u16 blocks, start, end; + u16 start, end; bool use_dma, fragmented = false; /* Check for transfer completion. */ @@ -1030,14 +1049,14 @@ static int atmel_aes_ctr_transfer(struct atmel_aes_dev *dd) /* Compute data length. */ datalen = req->cryptlen - ctx->offset; - blocks = DIV_ROUND_UP(datalen, AES_BLOCK_SIZE); + ctx->blocks = DIV_ROUND_UP(datalen, AES_BLOCK_SIZE); ctr = be32_to_cpu(ctx->iv[3]); /* Check 16bit counter overflow. */ start = ctr & 0xffff; - end = start + blocks - 1; + end = start + ctx->blocks - 1; - if (blocks >> 16 || end < start) { + if (ctx->blocks >> 16 || end < start) { ctr |= 0xffff; datalen = AES_BLOCK_SIZE * (0x10000 - start); fragmented = true; -- 2.20.1