From patchwork Wed May 17 10:38:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 9730817 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.web.codeaurora.org (Postfix) with ESMTP id 1175960363 for ; Wed, 17 May 2017 10:39:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0785028689 for ; Wed, 17 May 2017 10:39:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F08DD286E7; Wed, 17 May 2017 10:39:04 +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=-6.9 required=2.0 tests=BAYES_00,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 5C64D28689 for ; Wed, 17 May 2017 10:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753464AbdEQKjD (ORCPT ); Wed, 17 May 2017 06:39:03 -0400 Received: from esa3.microchip.iphmx.com ([68.232.153.233]:34402 "EHLO esa3.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752974AbdEQKjD (ORCPT ); Wed, 17 May 2017 06:39:03 -0400 X-IronPort-AV: E=Sophos;i="5.38,353,1491289200"; d="scan'208";a="2918620" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 17 May 2017 03:38:57 -0700 Received: from rob-ult-M18064.microchip.com (10.10.76.4) by chn-sv-exch06.mchp-main.com (10.10.76.107) with Microsoft SMTP Server id 14.3.181.6; Wed, 17 May 2017 03:38:56 -0700 From: Tudor Ambarus To: CC: , , , , Tudor Ambarus Subject: [RFC PATCH 2/4] crypto: ecdh - allow user to provide NULL privkey Date: Wed, 17 May 2017 13:38:34 +0300 Message-ID: <1495017516-10048-3-git-send-email-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1495017516-10048-1-git-send-email-tudor.ambarus@microchip.com> References: <1495017516-10048-1-git-send-email-tudor.ambarus@microchip.com> MIME-Version: 1.0 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 If the user provides a NULL ecc private key, the kernel will generate it and further use it for ecdh. Signed-off-by: Tudor Ambarus --- crypto/ecdh.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/crypto/ecdh.c b/crypto/ecdh.c index 63ca337..f28f5b5 100644 --- a/crypto/ecdh.c +++ b/crypto/ecdh.c @@ -55,6 +55,10 @@ static int ecdh_set_secret(struct crypto_kpp *tfm, const void *buf, ctx->curve_id = params.curve_id; ctx->ndigits = ndigits; + if (!params.key || !params.key_size) + return ecc_gen_privkey(ctx->curve_id, ctx->ndigits, + ctx->private_key); + if (ecc_is_key_valid(ctx->curve_id, ctx->ndigits, (const u8 *)params.key, params.key_size) < 0) return -EINVAL;