From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, UNWANTED_LANGUAGE_BODY,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 BE9D6C43441 for ; Fri, 16 Nov 2018 20:38:14 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 43D572086C for ; Fri, 16 Nov 2018 20:38:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 43D572086C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42xVRm2JhmzF3LS for ; Sat, 17 Nov 2018 07:38:12 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=bauerman@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42xTpg2jmKzF3nH for ; Sat, 17 Nov 2018 07:09:31 +1100 (AEDT) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wAGK8vpj116342 for ; Fri, 16 Nov 2018 15:09:29 -0500 Received: from e14.ny.us.ibm.com (e14.ny.us.ibm.com [129.33.205.204]) by mx0a-001b2d01.pphosted.com with ESMTP id 2nt4970yf8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 16 Nov 2018 15:09:29 -0500 Received: from localhost by e14.ny.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) Fri, 16 Nov 2018 20:09:21 -0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wAGK9Kca66715868 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 16 Nov 2018 20:09:20 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C363AAC059; Fri, 16 Nov 2018 20:09:20 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8FF90AC05E; Fri, 16 Nov 2018 20:09:16 +0000 (GMT) Received: from morokweng.localdomain.com (unknown [9.80.224.199]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Fri, 16 Nov 2018 20:09:16 +0000 (GMT) From: Thiago Jung Bauermann To: linux-integrity@vger.kernel.org Subject: [PATCH v8 13/14] ima: Write modsig to the measurement list Date: Fri, 16 Nov 2018 18:07:11 -0200 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20181116200712.14154-1-bauerman@linux.ibm.com> References: <20181116200712.14154-1-bauerman@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18111620-0052-0000-0000-000003576A27 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010063; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000270; SDB=6.01118417; UDB=6.00580177; IPR=6.00898525; MB=3.00024196; MTD=3.00000008; XFM=3.00000015; UTC=2018-11-16 20:09:26 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18111620-0053-0000-0000-00005EC974CF Message-Id: <20181116200712.14154-14-bauerman@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-11-16_11:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=3 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=8.0.1-1810050000 definitions=main-1811160179 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , linux-doc@vger.kernel.org, Dmitry Kasatkin , "David S. Miller" , Jonathan Corbet , linux-kernel@vger.kernel.org, Mimi Zohar , James Morris , David Howells , "AKASHI, Takahiro" , linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, Jessica Yu , linuxppc-dev@lists.ozlabs.org, David Woodhouse , Thiago Jung Bauermann , "Serge E. Hallyn" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add modsig support to the "sig" template field, allowing the the contents of the modsig to be included in the measurement list. Suggested-by: Mimi Zohar Signed-off-by: Thiago Jung Bauermann --- security/integrity/ima/ima.h | 7 +++++++ security/integrity/ima/ima_modsig.c | 13 +++++++++++++ security/integrity/ima/ima_template_lib.c | 15 ++++++++++++++- 3 files changed, 34 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 7f88e4b86156..8e1b1ddbe14f 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -315,6 +315,7 @@ int ima_read_modsig(enum ima_hooks func, const void *buf, loff_t buf_len, int *xattr_len); int ima_get_modsig_hash(struct evm_ima_xattr_data *hdr, enum hash_algo *algo, const u8 **hash, u8 *len); +int ima_modsig_serialize_data(struct evm_ima_xattr_data **data, int *data_len); int ima_modsig_verify(const unsigned int keyring_id, struct evm_ima_xattr_data *hdr); void ima_free_xattr_data(struct evm_ima_xattr_data *hdr); @@ -339,6 +340,12 @@ static inline int ima_get_modsig_hash(struct evm_ima_xattr_data *hdr, return -EOPNOTSUPP; } +static inline int ima_modsig_serialize_data(struct evm_ima_xattr_data **data, + int *data_len) +{ + return -EOPNOTSUPP; +} + static inline int ima_modsig_verify(const unsigned int keyring_id, struct evm_ima_xattr_data *hdr) { diff --git a/security/integrity/ima/ima_modsig.c b/security/integrity/ima/ima_modsig.c index 584d9d77b2c4..e31ab7dc11db 100644 --- a/security/integrity/ima/ima_modsig.c +++ b/security/integrity/ima/ima_modsig.c @@ -167,6 +167,19 @@ int ima_get_modsig_hash(struct evm_ima_xattr_data *hdr, enum hash_algo *algo, return pkcs7_get_digest(modsig->pkcs7_msg, hash, len); } +int ima_modsig_serialize_data(struct evm_ima_xattr_data **data, int *data_len) +{ + struct modsig_hdr *modsig = (struct modsig_hdr *) *data; + + if (!*data || (*data)->type != IMA_MODSIG) + return -EINVAL; + + *data = &modsig->raw_pkcs7; + *data_len = modsig->raw_pkcs7_len; + + return 0; +} + int ima_modsig_verify(const unsigned int keyring_id, struct evm_ima_xattr_data *hdr) { diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c index 36d175816894..417cd153ba60 100644 --- a/security/integrity/ima/ima_template_lib.c +++ b/security/integrity/ima/ima_template_lib.c @@ -411,10 +411,23 @@ int ima_eventsig_init(struct ima_event_data *event_data, struct ima_field_data *field_data) { struct evm_ima_xattr_data *xattr_value = event_data->xattr_value; + int xattr_len = event_data->xattr_len; if (!is_signed(xattr_value)) return 0; - return ima_write_template_field_data(xattr_value, event_data->xattr_len, + /* + * The xattr_value for IMA_MODSIG is a runtime structure containing + * pointers. Get its raw data instead. + */ + if (xattr_value->type == IMA_MODSIG) { + int rc; + + rc = ima_modsig_serialize_data(&xattr_value, &xattr_len); + if (rc) + return rc; + } + + return ima_write_template_field_data(xattr_value, xattr_len, DATA_FMT_HEX, field_data); }