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From: Roberto Sassu <roberto.sassu@huawei.com>
To: <zohar@linux.ibm.com>, <dmitry.kasatkin@huawei.com>, <mjg59@google.com>
Cc: <linux-integrity@vger.kernel.org>,
	<linux-security-module@vger.kernel.org>,
	<linux-fsdevel@vger.kernel.org>, <linux-doc@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <silviu.vlasceanu@huawei.com>,
	Roberto Sassu <roberto.sassu@huawei.com>
Subject: [PATCH v4 02/14] ima: generalize ima_read_policy()
Date: Fri, 14 Jun 2019 19:55:01 +0200
Message-ID: <20190614175513.27097-3-roberto.sassu@huawei.com> (raw)
In-Reply-To: <20190614175513.27097-1-roberto.sassu@huawei.com>

Rename ima_read_policy() to ima_read_file(), and add file_id as a new
parameter. If file_id is equal to READING_POLICY, ima_read_file() behavior
remains unchanged. If file_id will be READING_DIGEST_LIST (not yet
defined), ima_read_file() will read and parse a digest list from a file
whose path is written to securityfs.

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
---
 security/integrity/ima/ima_fs.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 2000e8df0301..02980b55a3f1 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -272,7 +272,7 @@ static const struct file_operations ima_ascii_measurements_ops = {
 	.release = seq_release,
 };
 
-static ssize_t ima_read_policy(char *path)
+static ssize_t ima_read_file(char *path, enum kernel_read_file_id file_id)
 {
 	void *data;
 	char *datap;
@@ -285,16 +285,26 @@ static ssize_t ima_read_policy(char *path)
 	datap = path;
 	strsep(&datap, "\n");
 
-	rc = kernel_read_file_from_path(path, &data, &size, 0, READING_POLICY);
+	rc = kernel_read_file_from_path(path, &data, &size, 0, file_id);
 	if (rc < 0) {
 		pr_err("Unable to open file: %s (%d)", path, rc);
 		return rc;
 	}
 
 	datap = data;
-	while (size > 0 && (p = strsep(&datap, "\n"))) {
-		pr_debug("rule: %s\n", p);
-		rc = ima_parse_add_rule(p);
+	while (size > 0) {
+		switch (file_id) {
+		case READING_POLICY:
+			p = strsep(&datap, "\n");
+			if (p == NULL)
+				break;
+
+			pr_debug("rule: %s\n", p);
+			rc = ima_parse_add_rule(p);
+			break;
+		default:
+			break;
+		}
 		if (rc < 0)
 			break;
 		size -= rc;
@@ -334,7 +344,7 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
 		goto out_free;
 
 	if (data[0] == '/') {
-		result = ima_read_policy(data);
+		result = ima_read_file(data, READING_POLICY);
 	} else if (ima_appraise & IMA_APPRAISE_POLICY) {
 		pr_err("signed policy file (specified as an absolute pathname) required\n");
 		integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL, NULL,
-- 
2.17.1


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 17:54 [PATCH v4 00/14] ima: introduce IMA Digest Lists extension Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 01/14] ima: read hash algorithm from security.ima even if appraisal is not enabled Roberto Sassu
2019-06-14 17:55 ` Roberto Sassu [this message]
2019-06-14 17:55 ` [PATCH v4 03/14] ima: generalize ima_write_policy() and raise uploaded data size limit Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 04/14] ima: generalize policy file operations Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 05/14] ima: use ima_show_htable_value to show violations and hash table data Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 06/14] ima: add parser of compact digest list Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 07/14] ima: restrict upload of converted digest lists Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 08/14] ima: prevent usage of digest lists that are not measured/appraised Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 09/14] ima: introduce new securityfs files Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 10/14] ima: load parser digests and execute the parser at boot time Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 11/14] ima: add support for measurement with digest lists Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 12/14] ima: add support for appraisal " Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 13/14] ima: introduce new policies initrd and appraise_initrd Roberto Sassu
2019-06-14 17:55 ` [PATCH v4 14/14] ima: add Documentation/security/IMA-digest-lists.txt Roberto Sassu
2019-06-17  6:56 ` [PATCH v4 00/14] ima: introduce IMA Digest Lists extension Roberto Sassu
2019-06-25 12:57   ` Roberto Sassu
2019-06-25 17:35     ` Mimi Zohar
2019-06-26 11:38       ` Roberto Sassu

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