From patchwork Wed Mar 25 10:47:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 11457453 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 8A18A1668 for ; Wed, 25 Mar 2020 10:49:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73C1A2077D for ; Wed, 25 Mar 2020 10:49:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727383AbgCYKto (ORCPT ); Wed, 25 Mar 2020 06:49:44 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2590 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726103AbgCYKtn (ORCPT ); Wed, 25 Mar 2020 06:49:43 -0400 Received: from lhreml702-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 4567F91104790E47CE1C; Wed, 25 Mar 2020 10:49:42 +0000 (GMT) Received: from roberto-HP-EliteDesk-800-G2-DM-65W.huawei.com (10.204.65.160) by smtpsuk.huawei.com (10.201.108.43) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 25 Mar 2020 10:49:33 +0000 From: Roberto Sassu To: , CC: , , , , Roberto Sassu Subject: [PATCH v4 3/7] ima: Store template digest directly in ima_template_entry Date: Wed, 25 Mar 2020 11:47:08 +0100 Message-ID: <20200325104712.25694-4-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200325104712.25694-1-roberto.sassu@huawei.com> References: <20200325104712.25694-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.65.160] X-CFilter-Loop: Reflected Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: In preparation for the patch that calculates a digest for each allocated PCR bank, this patch passes to ima_calc_field_array_hash() the ima_template_entry structure, so that digests can be directly stored in that structure instead of ima_digest_data. Signed-off-by: Roberto Sassu --- security/integrity/ima/ima.h | 3 +-- security/integrity/ima/ima_api.c | 12 +----------- security/integrity/ima/ima_crypto.c | 18 +++++++----------- 3 files changed, 9 insertions(+), 24 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 64317d95363e..a2dfe24e04c7 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -138,8 +138,7 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash); int ima_calc_buffer_hash(const void *buf, loff_t len, struct ima_digest_data *hash); int ima_calc_field_array_hash(struct ima_field_data *field_data, - struct ima_template_desc *desc, int num_fields, - struct ima_digest_data *hash); + struct ima_template_entry *entry); int __init ima_calc_boot_aggregate(struct ima_digest_data *hash); void ima_add_violation(struct file *file, const unsigned char *filename, struct integrity_iint_cache *iint, diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index f6bc00914aa5..2ef5a40c7ca5 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -96,26 +96,16 @@ int ima_store_template(struct ima_template_entry *entry, static const char audit_cause[] = "hashing_error"; char *template_name = entry->template_desc->name; int result; - struct { - struct ima_digest_data hdr; - char digest[TPM_DIGEST_SIZE]; - } hash; if (!violation) { - int num_fields = entry->template_desc->num_fields; - - /* this function uses default algo */ - hash.hdr.algo = HASH_ALGO_SHA1; result = ima_calc_field_array_hash(&entry->template_data[0], - entry->template_desc, - num_fields, &hash.hdr); + entry); if (result < 0) { integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, template_name, op, audit_cause, result, 0); return result; } - memcpy(entry->digest, hash.hdr.digest, hash.hdr.length); } entry->pcr = pcr; result = ima_add_template_entry(entry, violation, op, inode, filename); diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 8e445a671225..03d73a4009ab 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -464,18 +464,16 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash) * Calculate the hash of template data */ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data, - struct ima_template_desc *td, - int num_fields, - struct ima_digest_data *hash, + struct ima_template_entry *entry, struct crypto_shash *tfm) { SHASH_DESC_ON_STACK(shash, tfm); + struct ima_template_desc *td = entry->template_desc; + int num_fields = entry->template_desc->num_fields; int rc, i; shash->tfm = tfm; - hash->length = crypto_shash_digestsize(tfm); - rc = crypto_shash_init(shash); if (rc != 0) return rc; @@ -504,24 +502,22 @@ static int ima_calc_field_array_hash_tfm(struct ima_field_data *field_data, } if (!rc) - rc = crypto_shash_final(shash, hash->digest); + rc = crypto_shash_final(shash, entry->digest); return rc; } int ima_calc_field_array_hash(struct ima_field_data *field_data, - struct ima_template_desc *desc, int num_fields, - struct ima_digest_data *hash) + struct ima_template_entry *entry) { struct crypto_shash *tfm; int rc; - tfm = ima_alloc_tfm(hash->algo); + tfm = ima_alloc_tfm(HASH_ALGO_SHA1); if (IS_ERR(tfm)) return PTR_ERR(tfm); - rc = ima_calc_field_array_hash_tfm(field_data, desc, num_fields, - hash, tfm); + rc = ima_calc_field_array_hash_tfm(field_data, entry, tfm); ima_free_tfm(tfm);