From patchwork Wed Apr 7 03:49:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongbo Li X-Patchwork-Id: 12186771 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 2B59DC433B4 for ; Wed, 7 Apr 2021 03:50:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 03FB0613C6 for ; Wed, 7 Apr 2021 03:50:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348453AbhDGDuv (ORCPT ); Tue, 6 Apr 2021 23:50:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348503AbhDGDuO (ORCPT ); Tue, 6 Apr 2021 23:50:14 -0400 Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CBCBC06174A; Tue, 6 Apr 2021 20:50:05 -0700 (PDT) Received: by mail-pf1-x430.google.com with SMTP id v10so11930783pfn.5; Tue, 06 Apr 2021 20:50:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=OnoshHT7kOoHWmdZSKOnaWYfp7XXeFLdosqxj5qpzjw=; b=STPtszXRctw9+TT+8la68Rw7DOYaMtI0tX6b8mngOAGmS1T6mKx0a4cHotreGlXe6V 18OTdoQ0kuH07dofW/hHJ0EPEeQ3NSNPFXlnozpugT+8gU2CoSG4Pj/3yYR/843dxE5B dG8uOypKWrfITGmTatSA/usQbXqaYeTuinYPVsOCx0jbjwxH/5+pgU0ZM1z+sghvk+99 OXCYYdawNMl4Lb7f7HzogMVVmdtbOKQeEfnPai4G/u+XRqfbAFfIYjJAFIv2sbFwp8M+ 5RgWjN1M8zIPMCKy/enAamjffecFK8hbBCd1uiB4NyKoCjQMn57gzmH8GVftt4KF2sqN JhdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=OnoshHT7kOoHWmdZSKOnaWYfp7XXeFLdosqxj5qpzjw=; b=JSu8rj0Dvq/1DB2LaGP0liC0d12PmF5Dtnfi55O6Iq6jQMx0Prg7DUi/+omkrS5qPr XZK0/yIisE9eNHM+Eqe80nNyVSJZgWZ3clFawhsasPEtpYLAvdCgAjR99A1+JTCxVvyi 0/pfQ3BW+RXWjxowdsn74bRlLea7+gjvNqbdVH8vcq8RCtbf+bhE4sV2uxJ76w6U0dVK dTRDcE2BekOwzXKyJBpCUn+nEQx9d07aruO2flvjVus7L7rWkT75FkLwkIaiF5OAKu06 Wmvn4fFiEB8nKtjvrvoz3cBW3RCwZEhOxgysKPmDyK/0lRD+CwRt+naXl7B6PfJ6Ghf0 qUAw== X-Gm-Message-State: AOAM533QkLOAW8xAhENjiK3tsG4AeYj00tv9jsnwQYIMwYZ9M1TsSx4W bOr13LtAtgwZVB8w2zjvUIgbbfEAr7Wujw== X-Google-Smtp-Source: ABdhPJxwUwf+Ht4SscvgaZ4jjMxxQAp1ebQInQIU8paP0SN8akViV9uKyJSfo+sAOtjokY76YKlI6g== X-Received: by 2002:aa7:8756:0:b029:242:3e63:87da with SMTP id g22-20020aa787560000b02902423e6387damr602819pfo.66.1617767404663; Tue, 06 Apr 2021 20:50:04 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.39]) by smtp.gmail.com with ESMTPSA id s21sm6000922pgl.36.2021.04.06.20.50.02 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Apr 2021 20:50:04 -0700 (PDT) From: Hongbo Li To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au, dhowells@redhat.com, zohar@linux.ibm.com, jarkko@kernel.org, herberthbli@tencent.com Cc: linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org, Hongbo Li Subject: [PATCH v3 4/4] ima: add support for rsa pss verification Date: Wed, 7 Apr 2021 11:49:18 +0800 Message-Id: <1617767358-25279-5-git-send-email-herbert.tencent@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1617767358-25279-1-git-send-email-herbert.tencent@gmail.com> References: <1617767358-25279-1-git-send-email-herbert.tencent@gmail.com> Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org This patch adds support for ima verification for rsa with pss encoding. And a patch for ima-evm-utils will be sent later. Signed-off-by: Hongbo Li --- security/integrity/digsig_asymmetric.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index 23240d7..ef7a51a 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -85,6 +85,7 @@ int asymmetric_verify(struct key *keyring, const char *sig, struct public_key_signature pks; struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig; const struct public_key *pk; + struct public_key_signature *cert_sig; struct key *key; int ret; @@ -109,16 +110,21 @@ int asymmetric_verify(struct key *keyring, const char *sig, pk = asymmetric_key_public_key(key); pks.pkey_algo = pk->pkey_algo; - if (!strcmp(pk->pkey_algo, "rsa")) - pks.encoding = "pkcs1"; - else if (!strncmp(pk->pkey_algo, "ecdsa-", 6)) + if (!strcmp(pk->pkey_algo, "rsa")) { + cert_sig = key->payload.data[asym_auth]; + if (cert_sig) + pks.encoding = cert_sig->encoding; + else + pks.encoding = "pkcs1"; + } else if (!strncmp(pk->pkey_algo, "ecdsa-", 6)) { /* edcsa-nist-p192 etc. */ pks.encoding = "x962"; - else if (!strcmp(pk->pkey_algo, "ecrdsa") || - !strcmp(pk->pkey_algo, "sm2")) + } else if (!strcmp(pk->pkey_algo, "ecrdsa") || + !strcmp(pk->pkey_algo, "sm2")) { pks.encoding = "raw"; - else + } else { return -ENOPKG; + } pks.digest = (u8 *)data; pks.digest_size = datalen;