From patchwork Thu Jul 14 13:40:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 12917988 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 26EC7C43334 for ; Thu, 14 Jul 2022 13:41:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239850AbiGNNlQ (ORCPT ); Thu, 14 Jul 2022 09:41:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238596AbiGNNlP (ORCPT ); Thu, 14 Jul 2022 09:41:15 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E25AE6170B for ; Thu, 14 Jul 2022 06:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657806072; h=from:from:reply-to:subject:subject: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=Sd8cjBSOdeaVjyH4f3lxl+0xYw15nzSjwpJw6bzSgLk=; b=EdoWZW1O21sk5vnk3LhHyFWTeiiH6/nWAVYrzs4C3JdM0CzXovkeF68cdBENcmx9gcyzi4 Uf4z4Tv51dX1jSkAdqCP+MGFZ++Wf28syeeYkLanGNScJyAdNhXSYQuX2jLFUkkBQ1kaFB ipacCzb8crAy9FM5Is7JdDPNZerq/RM= Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-267-O7zbYb7BNACznFRkuUz4Qw-1; Thu, 14 Jul 2022 09:41:12 -0400 X-MC-Unique: O7zbYb7BNACznFRkuUz4Qw-1 Received: by mail-pl1-f200.google.com with SMTP id o5-20020a170902d4c500b0016c643623e8so241509plg.13 for ; Thu, 14 Jul 2022 06:41:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Sd8cjBSOdeaVjyH4f3lxl+0xYw15nzSjwpJw6bzSgLk=; b=SJc9JuiKtbAnr6oMwzRgo7UIlP3PW9U/bDGZuhhYq1SjcpgJaoh6F0k0OcDBw1Bi+n kPhmUfVQUN++oRlKUTiCOdr1SZ4pWJj9JobO1UzS4P4LxqU3xovNrrN6w+M9zhSv0Peg XgWoDUu4rD3rNEwl7Kc6nzHNqJsWWQIZeozAysWjB1wNvkB1kyzRfPudC4DOP4pFNBMC dvnVgLOeNh3FkRLuysnxeOgYJuT0Lujqjhf2asDBJHUVhkZ4YUYppsMFFbhoC3WPyQ9H OTgD3lFf3IsHVCI7zn4DoHhg8i96pjo2P0Q8UNgvytgzMubwRJBDdPlFxkO6U6XqBtw2 J+tw== X-Gm-Message-State: AJIora+0kfLpypVuzb/Urbew45a2YwvwhKqvWjxSBfAKcgTAFqv1PcGz o1tjIKeF3wvYHr8RF/9oXo94G57UyyxGph4pTdyt566ptj+e6hNOJt1Qmck2Ybmnm0dS0tfDhQx SfCSONIuZm7Fb4h0FHDU= X-Received: by 2002:a17:90b:4b82:b0:1f0:196d:4204 with SMTP id lr2-20020a17090b4b8200b001f0196d4204mr16396525pjb.194.1657806070932; Thu, 14 Jul 2022 06:41:10 -0700 (PDT) X-Google-Smtp-Source: AGRyM1v6W73kkND0lzdShUq0XCk7I59w6K6H/HhxbM9LJ4h4Bhv+gs6tfqbnzg5qbuZf1Ex6YUHUFA== X-Received: by 2002:a17:90b:4b82:b0:1f0:196d:4204 with SMTP id lr2-20020a17090b4b8200b001f0196d4204mr16396483pjb.194.1657806070591; Thu, 14 Jul 2022 06:41:10 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id h10-20020aa79f4a000000b00528d880a32fsm1663006pfr.78.2022.07.14.06.41.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jul 2022 06:41:10 -0700 (PDT) From: Coiby Xu To: kexec@lists.infradead.org, linux-integrity@vger.kernel.org Cc: Mimi Zohar , linux-arm-kernel@lists.infradead.org, Michal Suchanek , Baoquan He , Dave Young , Will Deacon , "Eric W . Biederman" , Chun-Yi Lee , stable@vger.kernel.org, Philipp Rudo , keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Martin Schwidefsky , linux-s390@vger.kernel.org (open list:S390), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v10 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Date: Thu, 14 Jul 2022 21:40:27 +0800 Message-Id: <20220714134027.394370-5-coxu@redhat.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220714134027.394370-1-coxu@redhat.com> References: <20220714134027.394370-1-coxu@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org From: Michal Suchanek commit e23a8020ce4e ("s390/kexec_file: Signature verification prototype") adds support for KEXEC_SIG verification with keys from platform keyring but the built-in keys and secondary keyring are not used. Add support for the built-in keys and secondary keyring as x86 does. Fixes: e23a8020ce4e ("s390/kexec_file: Signature verification prototype") Cc: stable@vger.kernel.org Cc: Philipp Rudo Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Signed-off-by: Michal Suchanek Reviewed-by: "Lee, Chun-Yi" Acked-by: Baoquan He Signed-off-by: Coiby Xu --- arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index 8f43575a4dd3..fc6d5f58debe 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -31,6 +31,7 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) const unsigned long marker_len = sizeof(MODULE_SIG_STRING) - 1; struct module_signature *ms; unsigned long sig_len; + int ret; /* Skip signature verification when not secure IPLed. */ if (!ipl_secure_flag) @@ -65,11 +66,18 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) return -EBADMSG; } - return verify_pkcs7_signature(kernel, kernel_len, - kernel + kernel_len, sig_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_MODULE_SIGNATURE, - NULL, NULL); + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + return ret; } #endif /* CONFIG_KEXEC_SIG */