From patchwork Wed Dec 1 00:48:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolai Stange X-Patchwork-Id: 12648819 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90F55C433F5 for ; Wed, 1 Dec 2021 00:50:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346061AbhLAAxh (ORCPT ); Tue, 30 Nov 2021 19:53:37 -0500 Received: from smtp-out2.suse.de ([195.135.220.29]:58162 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345919AbhLAAww (ORCPT ); Tue, 30 Nov 2021 19:52:52 -0500 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id C75781FD5E; Wed, 1 Dec 2021 00:49:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1638319771; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sp/R9+kBR6D1FAdvAU6tn+Xwz7vKBiFmqDWtMficmP0=; b=VUhkB0GP+7zxJC0t7g0sDQ1NYB89AGD6plDaiLYYvEDMqO1hQkEIIGxe9gtfogH8Vj35WU uQ3owCAEAmFht4mm2ZoioxqTddVJcrGXAmgNGRyrg4+fU9KKf94MAzLZj5jglHHV7TyS5D sT0ut1NA+76ZwXo+3mQ8yKZNY+ktoeQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1638319771; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sp/R9+kBR6D1FAdvAU6tn+Xwz7vKBiFmqDWtMficmP0=; b=NR6SShUdfcOKUDX7fHsPVdQVRoli93DG3OUM6ZAuWovO0AIgIt3Dy+loWNEg2Y/HwFuV7+ 9QjBbWp2XY2RtRCw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B1EA413C10; Wed, 1 Dec 2021 00:49:31 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id j7bJKZvGpmH6KAAAMHmgww (envelope-from ); Wed, 01 Dec 2021 00:49:31 +0000 From: Nicolai Stange To: Herbert Xu , "David S. Miller" Cc: =?utf-8?q?Stephan_M=C3=BCller?= , Hannes Reinecke , Torsten Duwe , Zaibo Xu , Giovanni Cabiddu , David Howells , Jarkko Sakkinen , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, qat-linux@intel.com, keyrings@vger.kernel.org, Nicolai Stange Subject: [PATCH 11/18] crypto: dh - introduce support for ephemeral key generation to hpre driver Date: Wed, 1 Dec 2021 01:48:51 +0100 Message-Id: <20211201004858.19831-12-nstange@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20211201004858.19831-1-nstange@suse.de> References: <20211201004858.19831-1-nstange@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org A previous patch made the dh-generic implementation's ->set_secret() to generate an ephemeral key in case the input ->key_size is zero, just in analogy with ecdh. Make the hpre crypto driver's DH implementation to behave consistently by doing the same. Signed-off-by: Nicolai Stange Reviewed-by: Hannes Reinecke --- drivers/crypto/hisilicon/hpre/hpre_crypto.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c index a032c192ef1d..02ca79e263f1 100644 --- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c +++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c @@ -701,11 +701,20 @@ static int hpre_dh_set_secret(struct crypto_kpp *tfm, const void *buf, { struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); struct dh params; + char key[CRYPTO_DH_MAX_PRIVKEY_SIZE]; int ret; if (crypto_dh_decode_key(buf, len, ¶ms) < 0) return -EINVAL; + if (!params.key_size) { + ret = crypto_dh_gen_privkey(params.group_id, key, + ¶ms.key_size); + if (ret) + return ret; + params.key = key; + } + /* Free old secret if any */ hpre_dh_clear_ctx(ctx, false); @@ -716,6 +725,8 @@ static int hpre_dh_set_secret(struct crypto_kpp *tfm, const void *buf, memcpy(ctx->dh.xa_p + (ctx->key_sz - params.key_size), params.key, params.key_size); + memzero_explicit(key, sizeof(key)); + return 0; err_clear_ctx: