From patchwork Wed Nov 6 19:01:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 11230875 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 32D2B1599 for ; Wed, 6 Nov 2019 19:02:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 12AED21D7E for ; Wed, 6 Nov 2019 19:02:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="JRWAv8jY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732259AbfKFTCD (ORCPT ); Wed, 6 Nov 2019 14:02:03 -0500 Received: from linux.microsoft.com ([13.77.154.182]:36136 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732217AbfKFTB1 (ORCPT ); Wed, 6 Nov 2019 14:01:27 -0500 Received: from nramas-ThinkStation-P520.corp.microsoft.com (unknown [131.107.174.108]) by linux.microsoft.com (Postfix) with ESMTPSA id A63CF20B4902; Wed, 6 Nov 2019 11:01:26 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com A63CF20B4902 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1573066886; bh=emQkMogDPg+7vZ3mbA++3IrBI+JG/p38LRyTUkrJ4qw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=JRWAv8jY0lkvRKSxRG0bkY8whJhlPyPo/gc5HddtERuoEfQ9x15MTs0QxvR9oMD3d EhvM9F14J3BHtK890ZG87YQUwDc11huOBlzAwURe/bXzC97l6JSerE+lhuUVRo9pti Sh2WbaoVCxs8rOrpBHomgCpnPdvx7hWd4Z0v4+dg= From: Lakshmi Ramasubramanian To: zohar@linux.ibm.com, dhowells@redhat.com, matthewgarrett@google.com, sashal@kernel.org, jamorris@linux.microsoft.com, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 02/10] IMA: Added KEYRING_CHECK func in IMA policy to measure keys Date: Wed, 6 Nov 2019 11:01:08 -0800 Message-Id: <20191106190116.2578-3-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191106190116.2578-1-nramas@linux.microsoft.com> References: <20191106190116.2578-1-nramas@linux.microsoft.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: IMA policy needs to support a func to enable measurement of asymmetric keys. This patch defines a new IMA policy func namely KEYRING_CHECK to measure asymmetric keys. Signed-off-by: Lakshmi Ramasubramanian --- Documentation/ABI/testing/ima_policy | 6 ++++++ security/integrity/ima/ima.h | 1 + security/integrity/ima/ima_policy.c | 2 +- 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy index 29aaedf33246..341df49b5ad1 100644 --- a/Documentation/ABI/testing/ima_policy +++ b/Documentation/ABI/testing/ima_policy @@ -30,6 +30,7 @@ Description: [FIRMWARE_CHECK] [KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK] [KEXEC_CMDLINE] + [KEYRING_CHECK] mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND] [[^]MAY_EXEC] fsmagic:= hex value @@ -113,3 +114,8 @@ Description: Example of appraise rule allowing modsig appended signatures: appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig + + Example of measure rule using KEYRING_CHECK to measure + all keys: + + measure func=KEYRING_CHECK diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index df4ca482fb53..7f23405b2718 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -193,6 +193,7 @@ static inline unsigned long ima_hash_key(u8 *digest) hook(KEXEC_INITRAMFS_CHECK) \ hook(POLICY_CHECK) \ hook(KEXEC_CMDLINE) \ + hook(KEYRING_CHECK) \ hook(MAX_CHECK) #define __ima_hook_enumify(ENUM) ENUM, diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index f19a895ad7cd..4344b7354fc5 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -373,7 +373,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, { int i; - if (func == KEXEC_CMDLINE) { + if ((func == KEXEC_CMDLINE) || (func == KEYRING_CHECK)) { if ((rule->flags & IMA_FUNC) && (rule->func == func)) return true; return false;