From patchwork Mon Nov 18 22:38:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 11250407 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 B64B514C0 for ; Mon, 18 Nov 2019 22:38:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 971A22230F for ; Mon, 18 Nov 2019 22:38:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="bhxRpbub" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726822AbfKRWii (ORCPT ); Mon, 18 Nov 2019 17:38:38 -0500 Received: from linux.microsoft.com ([13.77.154.182]:50938 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726909AbfKRWiZ (ORCPT ); Mon, 18 Nov 2019 17:38:25 -0500 Received: from nramas-ThinkStation-P520.corp.microsoft.com (unknown [131.107.174.108]) by linux.microsoft.com (Postfix) with ESMTPSA id 8CD9F20BBF29; Mon, 18 Nov 2019 14:38:24 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8CD9F20BBF29 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1574116704; bh=6fT84HQtmgssUIHiqprsdXnwaoFEPuDfnilSFBVgCag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bhxRpbubDoxZZNMwD/nPiDdS7Nq93sFgCWNTNFa6ggQycD9EDgzzueR/0godo8+1p U5PAOIlhW3+1ophunycD9SJXMDiloHw7Sn5u/V15bwQjM4WTdN1lSshnJEYrI01w4w r+eUVBw1jMsnpGMvYQlGnNBnDhV3q1Hs2MIQDecM= From: Lakshmi Ramasubramanian To: zohar@linux.ibm.com, linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, keyrings@vger.kernel.org Subject: [PATCH v8 5/5] IMA: Read keyrings= option from the IMA policy Date: Mon, 18 Nov 2019 14:38:18 -0800 Message-Id: <20191118223818.3353-6-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191118223818.3353-1-nramas@linux.microsoft.com> References: <20191118223818.3353-1-nramas@linux.microsoft.com> Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Read "keyrings=" option, if specified in the IMA policy, and store in the list of IMA rules when the configured IMA policy is read. This patch defines a new policy token enum namely Opt_keyrings and an option flag IMA_KEYRINGS for reading "keyrings=" option from the IMA policy. Updated ima_parse_rule() to parse "keyrings=" option in the policy. Updated ima_policy_show() to display "keyrings=" option. Signed-off-by: Lakshmi Ramasubramanian Cc: Sasha Levin Cc: James Morris --- security/integrity/ima/ima_policy.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index d9400585fcda..78b25f083fe1 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -34,6 +34,7 @@ #define IMA_EUID 0x0080 #define IMA_PCR 0x0100 #define IMA_FSNAME 0x0200 +#define IMA_KEYRINGS 0x0400 #define UNKNOWN 0 #define MEASURE 0x0001 /* same as IMA_MEASURE */ @@ -825,7 +826,8 @@ enum { Opt_uid_gt, Opt_euid_gt, Opt_fowner_gt, Opt_uid_lt, Opt_euid_lt, Opt_fowner_lt, Opt_appraise_type, Opt_appraise_flag, - Opt_permit_directio, Opt_pcr, Opt_template, Opt_err + Opt_permit_directio, Opt_pcr, Opt_template, Opt_keyrings, + Opt_err }; static const match_table_t policy_tokens = { @@ -861,6 +863,7 @@ static const match_table_t policy_tokens = { {Opt_permit_directio, "permit_directio"}, {Opt_pcr, "pcr=%s"}, {Opt_template, "template=%s"}, + {Opt_keyrings, "keyrings=%s"}, {Opt_err, NULL} }; @@ -1110,6 +1113,23 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) result = 0; entry->flags |= IMA_FSNAME; break; + case Opt_keyrings: + ima_log_string(ab, "keyrings", args[0].from); + + if ((entry->keyrings) || + (entry->action != MEASURE) || + (entry->func != KEY_CHECK)) { + result = -EINVAL; + break; + } + entry->keyrings = kstrdup(args[0].from, GFP_KERNEL); + if (!entry->keyrings) { + result = -ENOMEM; + break; + } + result = 0; + entry->flags |= IMA_KEYRINGS; + break; case Opt_fsuuid: ima_log_string(ab, "fsuuid", args[0].from); @@ -1485,6 +1505,13 @@ int ima_policy_show(struct seq_file *m, void *v) seq_puts(m, " "); } + if (entry->flags & IMA_KEYRINGS) { + if (entry->keyrings != NULL) + snprintf(tbuf, sizeof(tbuf), "%s", entry->keyrings); + seq_printf(m, pt(Opt_keyrings), tbuf); + seq_puts(m, " "); + } + if (entry->flags & IMA_PCR) { snprintf(tbuf, sizeof(tbuf), "%d", entry->pcr); seq_printf(m, pt(Opt_pcr), tbuf);