From patchwork Mon Nov 11 19:33:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lakshmi Ramasubramanian X-Patchwork-Id: 11237533 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 2D27A17E6 for ; Mon, 11 Nov 2019 19:33:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0BA4C21E6F for ; Mon, 11 Nov 2019 19:33:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="cTNKNJhT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727673AbfKKTdT (ORCPT ); Mon, 11 Nov 2019 14:33:19 -0500 Received: from linux.microsoft.com ([13.77.154.182]:44852 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727102AbfKKTdK (ORCPT ); Mon, 11 Nov 2019 14:33:10 -0500 Received: from nramas-ThinkStation-P520.corp.microsoft.com (unknown [131.107.174.108]) by linux.microsoft.com (Postfix) with ESMTPSA id D27BF20B4907; Mon, 11 Nov 2019 11:33:09 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D27BF20B4907 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1573500789; bh=OgU4RosYDDili/HfJXIWfaINwd/GWDYvrkC5K+otw4Y=; h=From:To:Subject:Date:In-Reply-To:References:From; b=cTNKNJhTeUXNjcjVGnZR/7EC273kOm68YCZvSbJmNSbAjeOCar8Or2XFhHLBVCdLV exDFMLjazMfDsJ2PUNOGwaIwjlg7dpIB0+20PIf6jamCsLTXpvqyzSHgWNEO4XxU23 qYQuHvl1QjFxF0rQkGXdE7aj+0ymzszd0D6fMR00= 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 v5 07/10] KEYS: Call the IMA hook to measure key when a new key is created or an existing key is updated Date: Mon, 11 Nov 2019 11:33:00 -0800 Message-Id: <20191111193303.12781-8-nramas@linux.microsoft.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191111193303.12781-1-nramas@linux.microsoft.com> References: <20191111193303.12781-1-nramas@linux.microsoft.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: key_create_or_update function needs to call the IMA hook to measure the key when a new key is created or an existing key is updated. This patch adds the call to the IMA hook from key_create_or_update function. Signed-off-by: Lakshmi Ramasubramanian --- include/linux/ima.h | 13 +++++++++++++ security/keys/key.c | 9 +++++++++ 2 files changed, 22 insertions(+) diff --git a/include/linux/ima.h b/include/linux/ima.h index 6d904754d858..ec5afe319ab7 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -25,6 +25,12 @@ extern int ima_post_read_file(struct file *file, void *buf, loff_t size, extern void ima_post_path_mknod(struct dentry *dentry); extern void ima_kexec_cmdline(const void *buf, int size); +#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS +extern void ima_post_key_create_or_update(struct key *keyring, + struct key *key, + unsigned long flags, bool create); +#endif + #ifdef CONFIG_IMA_KEXEC extern void ima_add_kexec_buffer(struct kimage *image); #endif @@ -101,6 +107,13 @@ static inline void ima_add_kexec_buffer(struct kimage *image) {} #endif +#ifndef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS +static inline void ima_post_key_create_or_update(struct key *keyring, + struct key *key, + unsigned long flags, + bool create) {} +#endif + #ifdef CONFIG_IMA_APPRAISE extern bool is_ima_appraise_enabled(void); extern void ima_inode_post_setattr(struct dentry *dentry); diff --git a/security/keys/key.c b/security/keys/key.c index 764f4c57913e..9782d4d046fd 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include "internal.h" @@ -936,6 +937,9 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, goto error_link_end; } + /* let the ima module know about the created key. */ + ima_post_key_create_or_update(keyring, key, flags, true); + key_ref = make_key_ref(key, is_key_possessed(keyring_ref)); error_link_end: @@ -965,6 +969,11 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, } key_ref = __key_update(key_ref, &prep); + + /* let the ima module know about the updated key. */ + if (!IS_ERR(key_ref)) + ima_post_key_create_or_update(keyring, key, flags, false); + goto error_free_prep; } EXPORT_SYMBOL(key_create_or_update);