From patchwork Tue Jun 26 17:23:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 10489825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D756D601A0 for ; Tue, 26 Jun 2018 17:24:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA63D26E75 for ; Tue, 26 Jun 2018 17:24:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AF2FB284AA; Tue, 26 Jun 2018 17:24:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D331526E75 for ; Tue, 26 Jun 2018 17:24:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932449AbeFZRYX (ORCPT ); Tue, 26 Jun 2018 13:24:23 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:49082 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932078AbeFZRXr (ORCPT ); Tue, 26 Jun 2018 13:23:47 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w5QHIlUr085269 for ; Tue, 26 Jun 2018 13:23:47 -0400 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0a-001b2d01.pphosted.com with ESMTP id 2juqgey0cd-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 26 Jun 2018 13:23:46 -0400 Received: from localhost by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 26 Jun 2018 11:23:43 -0600 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w5QHNgxw10551566 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 26 Jun 2018 10:23:42 -0700 Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1240C78063; Tue, 26 Jun 2018 11:23:42 -0600 (MDT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7C8C278064; Tue, 26 Jun 2018 11:23:41 -0600 (MDT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 26 Jun 2018 11:23:41 -0600 (MDT) From: Stefan Berger To: linux-integrity@vger.kernel.org, jarkko.sakkinen@linux.intel.com, zohar@linux.vnet.ibm.com Cc: jgg@ziepe.ca, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Stefan Berger Subject: [PATCH v6 4/5] ima: Use tpm_default_chip() and call TPM functions with a tpm_chip Date: Tue, 26 Jun 2018 13:23:30 -0400 X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180626172331.2505541-1-stefanb@linux.vnet.ibm.com> References: <20180626172331.2505541-1-stefanb@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18062617-0004-0000-0000-0000145A6378 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009259; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01052673; UDB=6.00539671; IPR=6.00830598; MB=3.00021864; MTD=3.00000008; XFM=3.00000015; UTC=2018-06-26 17:23:44 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18062617-0005-0000-0000-000087E05448 Message-Id: <20180626172331.2505541-5-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-06-26_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1806260195 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Rather than accessing the TPM functions by passing a NULL pointer for the tpm_chip, which causes a lookup for a suitable chip every time, get a hold of a tpm_chip and access the TPM functions using it. Signed-off-by: Stefan Berger Acked-by: Jarkko Sakkinen --- security/integrity/ima/ima.h | 1 + security/integrity/ima/ima_crypto.c | 2 +- security/integrity/ima/ima_init.c | 11 ++++------- security/integrity/ima/ima_queue.c | 2 +- 4 files changed, 7 insertions(+), 9 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 354bb5716ce3..35409461a3f2 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -56,6 +56,7 @@ extern int ima_policy_flag; extern int ima_used_chip; extern int ima_hash_algo; extern int ima_appraise; +extern struct tpm_chip *ima_tpm_chip; /* IMA event related data */ struct ima_event_data { diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 4e085a17124f..88082f35adb2 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -634,7 +634,7 @@ static void __init ima_pcrread(int idx, u8 *pcr) if (!ima_used_chip) return; - if (tpm_pcr_read(NULL, idx, pcr) != 0) + if (tpm_pcr_read(ima_tpm_chip, idx, pcr) != 0) pr_err("Error Communicating to TPM chip\n"); } diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c index 29b72cd2502e..1437ed3dbccc 100644 --- a/security/integrity/ima/ima_init.c +++ b/security/integrity/ima/ima_init.c @@ -27,6 +27,7 @@ /* name for boot aggregate entry */ static const char *boot_aggregate_name = "boot_aggregate"; int ima_used_chip; +struct tpm_chip *ima_tpm_chip; /* Add the boot aggregate to the IMA measurement list and extend * the PCR register. @@ -106,17 +107,13 @@ void __init ima_load_x509(void) int __init ima_init(void) { - u8 pcr_i[TPM_DIGEST_SIZE]; int rc; - ima_used_chip = 0; - rc = tpm_pcr_read(NULL, 0, pcr_i); - if (rc == 0) - ima_used_chip = 1; + ima_tpm_chip = tpm_default_chip(); + ima_used_chip = ima_tpm_chip != NULL; if (!ima_used_chip) - pr_info("No TPM chip found, activating TPM-bypass! (rc=%d)\n", - rc); + pr_info("No TPM chip found, activating TPM-bypass!\n"); rc = integrity_init_keyring(INTEGRITY_KEYRING_IMA); if (rc) diff --git a/security/integrity/ima/ima_queue.c b/security/integrity/ima/ima_queue.c index 418f35e38015..c6303fa19a49 100644 --- a/security/integrity/ima/ima_queue.c +++ b/security/integrity/ima/ima_queue.c @@ -145,7 +145,7 @@ static int ima_pcr_extend(const u8 *hash, int pcr) if (!ima_used_chip) return result; - result = tpm_pcr_extend(NULL, pcr, hash); + result = tpm_pcr_extend(ima_tpm_chip, pcr, hash); if (result != 0) pr_err("Error Communicating to TPM chip, result: %d\n", result); return result;