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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,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 96F43C169C4 for ; Tue, 29 Jan 2019 13:26:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 60CF82147A for ; Tue, 29 Jan 2019 13:26:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XsJK42ei" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726390AbfA2N0k (ORCPT ); Tue, 29 Jan 2019 08:26:40 -0500 Received: from mail-ed1-f44.google.com ([209.85.208.44]:42925 "EHLO mail-ed1-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726060AbfA2N0j (ORCPT ); Tue, 29 Jan 2019 08:26:39 -0500 Received: by mail-ed1-f44.google.com with SMTP id y20so15940736edw.9 for ; Tue, 29 Jan 2019 05:26:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=lkAak8YkVJhMqmBbCroxFOGLIBlfK/xui5S8VQTp+Bw=; b=XsJK42eiwbirM4N2BMpweZZjVOJzWH2IQxkGm9GS0bjEGf9OKNHGyuZyBN7wc3+hmM CaQH8sQc823b6z8IodAIo4LGuGhDy/umotQwO7Vl/N8apovf196jPy+cNvFIqLR3Ar3I c2CUI3WD6EBEFdi13GM1vM5s1uoqnMaFCaWllKNM7GZ98N6qkRUmLuEBnm4+kfiCx11Q D2kAQNYBmimX5p3l5OVpF+MBVkbrd3zNezwM5/jd7fRRqrsiqyOkUsJmoxElxFuOq8WQ Bx0wikBoCGBLbEE7zzM4Wv8K1Ah3H1hs39HXQtHCWbQiykms3ls4pLIHoI7Kb3t6GVNl 3IzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=lkAak8YkVJhMqmBbCroxFOGLIBlfK/xui5S8VQTp+Bw=; b=PxqvqGfByFoin8Hz1BohgL9rXb9Tj8Os9BroaTyM47YDNCvFAECyD8fKXIves3NPB2 iGWyHfQvMcU6qmyabbxPZ0b2TWTMWU5WLqnoDx15ZEykUMKs9giQ9iEbeFHVoOAmFUzt RwSOP6HlmM4e51Kr8LrytL9b9MhThYEOYZ/29pgqU6EmcSSuloHTr4HgyNMp0coS0ckj RkF+BmJfEblO5ez7xlkyMfNTw5WNOtXaxa2dKpiMmqUu6VactECLxIl5IAWxKCV37wpg SDnoh15PxGDpHzS1Z41XzdAX34SNQMo1lQxSSknE9YM5vhZF9mVa7SqFkJDtVHGIjtV1 S04w== X-Gm-Message-State: AJcUukeW95Qf0iWqQ3pr9JZLD1DuK3bvhyUwpTwtMvg5sjk+A+YTOmpE c5kfZFzBNApOu1eZMw5kV0+ARxx2 X-Google-Smtp-Source: ALg8bN4oSbuClcGiDx9mxgXUpAf/8eQNHNLdGQuvAI3WL92fiUUGR7fIgAb1zn7KQU/dyaJNWjuMVw== X-Received: by 2002:a17:906:78c6:: with SMTP id r6mr22818417ejn.123.1548768397454; Tue, 29 Jan 2019 05:26:37 -0800 (PST) Received: from localhost.localdomain ([192.198.151.62]) by smtp.gmail.com with ESMTPSA id i14-v6sm8179964ejy.40.2019.01.29.05.26.35 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 29 Jan 2019 05:26:36 -0800 (PST) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH BlueZ 01/15] shared/crypto: Add bt_crypto_gatt_hash Date: Tue, 29 Jan 2019 15:26:20 +0200 Message-Id: <20190129132634.28786-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.17.2 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz The bt_crypto_gatt_hash uses AES-CCM to create a hash with the contents stored in the iovec. Note: The spec disregards the byte order so both the key, msg and res are not swapped. --- src/shared/crypto.c | 31 +++++++++++++++++++++++++++++++ src/shared/crypto.h | 3 +++ 2 files changed, 34 insertions(+) diff --git a/src/shared/crypto.c b/src/shared/crypto.c index ce0dcd638..5c5e1217d 100644 --- a/src/shared/crypto.c +++ b/src/shared/crypto.c @@ -688,3 +688,34 @@ bool bt_crypto_h6(struct bt_crypto *crypto, const uint8_t w[16], return true; } + +bool bt_crypto_gatt_hash(struct bt_crypto *crypto, struct iovec *iov, + size_t iov_len, uint8_t res[16]) +{ + const uint8_t key[16] = {}; + ssize_t len; + int fd; + + if (!crypto) + return false; + + fd = alg_new(crypto->cmac_aes, key, 16); + if (fd < 0) + return false; + + len = writev(fd, iov, iov_len); + if (len < 0) { + close(fd); + return false; + } + + len = read(fd, res, 16); + if (len < 0) { + close(fd); + return false; + } + + close(fd); + + return true; +} diff --git a/src/shared/crypto.h b/src/shared/crypto.h index 1e1b4836d..c58d2e104 100644 --- a/src/shared/crypto.h +++ b/src/shared/crypto.h @@ -23,6 +23,7 @@ #include #include +#include struct bt_crypto; @@ -61,3 +62,5 @@ bool bt_crypto_h6(struct bt_crypto *crypto, const uint8_t w[16], bool bt_crypto_sign_att(struct bt_crypto *crypto, const uint8_t key[16], const uint8_t *m, uint16_t m_len, uint32_t sign_cnt, uint8_t signature[12]); +bool bt_crypto_gatt_hash(struct bt_crypto *crypto, struct iovec *iov, + size_t iov_len, uint8_t res[16]); -- 2.17.2