From patchwork Mon Jul 4 01:52:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 12904565 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 8EDB7C433EF for ; Mon, 4 Jul 2022 01:53:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233187AbiGDBxQ (ORCPT ); Sun, 3 Jul 2022 21:53:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233117AbiGDBxD (ORCPT ); Sun, 3 Jul 2022 21:53:03 -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 8A9E263A0 for ; Sun, 3 Jul 2022 18:52:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656899578; 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=TjkRti3tc7D33SgHckdkCfWPP3RrvKpOIQZ7y944yPQH/yGbnHWig4LYqw02ie1mjKy+Y9 0XefDs5fzk0tfaa/gOnsnUfcnXkjsyfBnpg9AcLC1a/JUG8sF8sGemKdtoJK8LgPtFTpsT UTORJt7UXpIdZtplxw99vpyPXe+hab4= Received: from mail-pj1-f71.google.com (mail-pj1-f71.google.com [209.85.216.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-203-pvv8sdyNNwOoCacsYOy1fw-1; Sun, 03 Jul 2022 21:52:55 -0400 X-MC-Unique: pvv8sdyNNwOoCacsYOy1fw-1 Received: by mail-pj1-f71.google.com with SMTP id t18-20020a17090aba9200b001ef85dba391so1104482pjr.7 for ; Sun, 03 Jul 2022 18:52:54 -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=fxCy0z/nH2rT9/tjEE2aq7m9nR32CzWzinPCLBJWBTqVai4LNgLawlcD1ptm9A7N34 uVNnbsoHSjqnb1DRHWRyiucUN3QwyJw7MMuLHrTOm/3SJ962ykUm0+kG3w9VxBUAsjHT jmgUaHTWttJHnW48nzoWQGmrNvMoCkRhpOJXtWuTKOBPyUqav8+r8sp6LrIwDeMx6jGW MOC69XbxgkPi4ge0jdcXpyuHbaEraliWyUjcyydxk/QxOHZacfxvDrR2C4Vf5ZLo73wI DKBDSS4ceWtYQQM4FLgdkwic2zRZU0e8ee54hurQbHG6axNSmCE2F9rgKqiRb2BBS0HP VDTw== X-Gm-Message-State: AJIora9BXM/2dgy+DGjGVk/faGcPWICnODYi/ArfZPvtDOToY+bd7Qvg CWhKO7hf91xK1JIjPhNkLu6WrwGZiGVFsZHSkYy8I4yLiBpIJ0mKYjkPonNWkms6DaNrUuknuqH I1ZqCM9kNZyZ0jMo0PbCA8DNZp+uA X-Received: by 2002:a17:90a:1485:b0:1ec:788e:a053 with SMTP id k5-20020a17090a148500b001ec788ea053mr31016128pja.16.1656899573984; Sun, 03 Jul 2022 18:52:53 -0700 (PDT) X-Google-Smtp-Source: AGRyM1u8Sm73HYl29mcEbEmk3Z6a37A8y2OdP5f3idLICxDPGrBoxyTSHxhDRsHAFrxMwDkh5wCuzQ== X-Received: by 2002:a17:90a:1485:b0:1ec:788e:a053 with SMTP id k5-20020a17090a148500b001ec788ea053mr31016116pja.16.1656899573776; Sun, 03 Jul 2022 18:52:53 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id p2-20020a1709027ec200b00168f08d0d12sm16841927plb.89.2022.07.03.18.52.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 18:52:53 -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 v9 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Date: Mon, 4 Jul 2022 09:52:01 +0800 Message-Id: <20220704015201.59744-5-coxu@redhat.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220704015201.59744-1-coxu@redhat.com> References: <20220704015201.59744-1-coxu@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@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 */