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=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 1AD87C43142 for ; Thu, 2 Aug 2018 21:51:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADA872159F for ; Thu, 2 Aug 2018 21:51:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="P6LB+vxj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ADA872159F Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732248AbeHBXo1 (ORCPT ); Thu, 2 Aug 2018 19:44:27 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:41580 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731070AbeHBXo1 (ORCPT ); Thu, 2 Aug 2018 19:44:27 -0400 Received: by mail-pf1-f193.google.com with SMTP id y10-v6so2063364pfn.8 for ; Thu, 02 Aug 2018 14:51:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=4IeB5RudLojmcqsM5aWtIarfYxOSvqZFxbzNfxpLrPA=; b=P6LB+vxjUgvuKs7Dac2UEiqHtGIFVDSQQA6Zu5Ijsc3fC6f4QDKz9jBqoCHwGx5G02 5GW839forCJ+d/3LlH0BWMsP5f5gn00608hPG8nP2UO9o8TA9nfLqy70fTqLi2BizE2M bXcTIaE8zmjFhEVLtu/j3Dh2FiqVddrukQlWA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=4IeB5RudLojmcqsM5aWtIarfYxOSvqZFxbzNfxpLrPA=; b=RKn567gUM2PMPWyuS5GfhxSXFH0vHCBrbw5yEDYSLjSYGIP/H0lnS6tTXPXO75xveu ixxSeb+bHUE3mN7ypv7b0ioNEXHS8n0Tfpmbb5l/CD08PB6kMvd4rnWJVs9ZQ39ks1tQ ufLyC6lCECQ3DmsnZgbxYoLEEcylhzqpb4X68QcZQliaOkn2k0UZHumvvrUbmk0yZKo5 iqPlKh1lSlUZtFlwPEg4dsFzv0/2FnTZByf17twoPupU4Hv1nlptCInBwu5XcQC6Fc0y RaQ0oxV1HqZ5kEr1MS1HVm1MOAJjXAzsxSajbeyiyEJa1/QfXhLp6rVRmSmCCt3vwZia Rojw== X-Gm-Message-State: AOUpUlHYWoW47Z97JvryOcLNd4msuy13iNkntdnG+Fag/xmcizzgwWyX EDPXI+Psz+VWWGGTQD1BvwADaA== X-Google-Smtp-Source: AAOMgpflYt0nYuPF+0HLVgNIydMlXkG7Cn7o5nEUBtTmqR9OrCbNTGrXrRLTe9f8r4L48y2SaWR26g== X-Received: by 2002:a62:d34a:: with SMTP id q71-v6mr1278749pfg.17.1533246684829; Thu, 02 Aug 2018 14:51:24 -0700 (PDT) Received: from www.outflux.net (173-164-112-133-Oregon.hfc.comcastbusiness.net. [173.164.112.133]) by smtp.gmail.com with ESMTPSA id a191-v6sm4866503pge.45.2018.08.02.14.51.22 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 02 Aug 2018 14:51:23 -0700 (PDT) From: Kees Cook To: Herbert Xu Cc: Kees Cook , Geliang Tang , Arnd Bergmann , Haren Myneni , Anton Vorontsov , Colin Cross , Tony Luck , Zhou Wang , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/9] crypto, null: Implement zbufsize() Date: Thu, 2 Aug 2018 14:51:12 -0700 Message-Id: <20180802215118.17752-4-keescook@chromium.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180802215118.17752-1-keescook@chromium.org> References: <20180802215118.17752-1-keescook@chromium.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This implements the worst-case compression size querying interface for the "null" compression implementation (i.e. no change in size). Signed-off-by: Kees Cook --- crypto/crypto_null.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/crypto/crypto_null.c b/crypto/crypto_null.c index 20ff2c746e0b..d1b6107f8443 100644 --- a/crypto/crypto_null.c +++ b/crypto/crypto_null.c @@ -39,6 +39,13 @@ static int null_compress(struct crypto_tfm *tfm, const u8 *src, return 0; } +static int null_zbufsize(struct crypto_tfm *tfm, unsigned int slen, + unsigned int *dlen) +{ + *dlen = slen; + return 0; +} + static int null_init(struct shash_desc *desc) { return 0; @@ -146,7 +153,8 @@ static struct crypto_alg null_algs[3] = { { .cra_module = THIS_MODULE, .cra_u = { .compress = { .coa_compress = null_compress, - .coa_decompress = null_compress } } + .coa_decompress = null_compress, + .coa_zbufsize = null_zbufsize } } } }; MODULE_ALIAS_CRYPTO("compress_null"); -- 2.17.1