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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 2 Jul 2018 09:24:58 -0600 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w62FOv6S9568582 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 2 Jul 2018 08:24:57 -0700 Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 822EAC6057; Mon, 2 Jul 2018 09:24:57 -0600 (MDT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E6BBCC605A; Mon, 2 Jul 2018 09:24:56 -0600 (MDT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 2 Jul 2018 09:24:56 -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] ima: Use tpm_default_chip() and call TPM functions with a tpm_chip Date: Mon, 2 Jul 2018 11:24:49 -0400 X-Mailer: git-send-email 2.14.4 X-TM-AS-GCONF: 00 x-cbid: 18070215-0004-0000-0000-0000145D78B3 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009295; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01055513; UDB=6.00541375; IPR=6.00833436; MB=3.00021964; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-02 15:25:00 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18070215-0005-0000-0000-000087F18D0C Message-Id: <20180702152449.3219288-1-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-07-02_05:, , 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-1807020176 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org 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. Also get rid of the ima_used_chip variable and use the new ima_tpm_chip variable instead for determining whether to call TPM functions. Signed-off-by: Stefan Berger Acked-by: Jarkko Sakkinen Signed-off-by: Mimi Zohar --- security/integrity/ima/ima.h | 2 +- security/integrity/ima/ima_crypto.c | 4 ++-- security/integrity/ima/ima_init.c | 16 +++++----------- security/integrity/ima/ima_queue.c | 4 ++-- 4 files changed, 10 insertions(+), 16 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 354bb5716ce3..2ab1affffa36 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -53,9 +53,9 @@ enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8 }; extern int ima_policy_flag; /* set during initialization */ -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..7e7e7e7c250a 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -631,10 +631,10 @@ int ima_calc_buffer_hash(const void *buf, loff_t len, static void __init ima_pcrread(int idx, u8 *pcr) { - if (!ima_used_chip) + if (!ima_tpm_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..faac9ecaa0ae 100644 --- a/security/integrity/ima/ima_init.c +++ b/security/integrity/ima/ima_init.c @@ -26,7 +26,7 @@ /* 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. @@ -64,7 +64,7 @@ static int __init ima_add_boot_aggregate(void) iint->ima_hash->algo = HASH_ALGO_SHA1; iint->ima_hash->length = SHA1_DIGEST_SIZE; - if (ima_used_chip) { + if (ima_tpm_chip) { result = ima_calc_boot_aggregate(&hash.hdr); if (result < 0) { audit_cause = "hashing_error"; @@ -106,17 +106,11 @@ 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; - - if (!ima_used_chip) - pr_info("No TPM chip found, activating TPM-bypass! (rc=%d)\n", - rc); + ima_tpm_chip = tpm_default_chip(); + if (!ima_tpm_chip) + 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..b186819bd5aa 100644 --- a/security/integrity/ima/ima_queue.c +++ b/security/integrity/ima/ima_queue.c @@ -142,10 +142,10 @@ static int ima_pcr_extend(const u8 *hash, int pcr) { int result = 0; - if (!ima_used_chip) + if (!ima_tpm_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;