[deliverable/linux.git] / security / integrity / ima / ima_template_lib.c

/*
 * Copyright (C) 2013 Politecnico di Torino, Italy
 *                    TORSEC group -- http://security.polito.it
 *
 * Author: Roberto Sassu <roberto.sassu@polito.it>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 *
 * File: ima_template_lib.c
 *      Library of supported template fields.
 */

#include "ima_template_lib.h"

static bool ima_template_hash_algo_allowed(u8 algo)
{
	if (algo == HASH_ALGO_SHA1 || algo == HASH_ALGO_MD5)
		return true;

	return false;
}

enum data_formats {
	DATA_FMT_DIGEST = 0,
	DATA_FMT_DIGEST_WITH_ALGO,
	DATA_FMT_STRING,
	DATA_FMT_HEX
};

static int ima_write_template_field_data(const void *data, const u32 datalen,
					 enum data_formats datafmt,
					 struct ima_field_data *field_data)
{
	u8 *buf, *buf_ptr;
	u32 buflen = datalen;

	if (datafmt == DATA_FMT_STRING)
		buflen = datalen + 1;

	buf = kzalloc(buflen, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	memcpy(buf, data, datalen);

	/*
	 * Replace all space characters with underscore for event names and
	 * strings. This avoid that, during the parsing of a measurements list,
	 * filenames with spaces or that end with the suffix ' (deleted)' are
	 * split into multiple template fields (the space is the delimitator
	 * character for measurements lists in ASCII format).
	 */
	if (datafmt == DATA_FMT_STRING) {
		for (buf_ptr = buf; buf_ptr - buf < datalen; buf_ptr++)
			if (*buf_ptr == ' ')
				*buf_ptr = '_';
	}

	field_data->data = buf;
	field_data->len = buflen;
	return 0;
}

static void ima_show_template_data_ascii(struct seq_file *m,
					 enum ima_show_type show,
					 enum data_formats datafmt,
					 struct ima_field_data *field_data)
{
	u8 *buf_ptr = field_data->data;
	u32 buflen = field_data->len;

	switch (datafmt) {
	case DATA_FMT_DIGEST_WITH_ALGO:
		buf_ptr = strnchr(field_data->data, buflen, ':');
		if (buf_ptr != field_data->data)
			seq_printf(m, "%s", field_data->data);

		/* skip ':' and '\0' */
		buf_ptr += 2;
		buflen -= buf_ptr - field_data->data;
	case DATA_FMT_DIGEST:
	case DATA_FMT_HEX:
		if (!buflen)
			break;
		ima_print_digest(m, buf_ptr, buflen);
		break;
	case DATA_FMT_STRING:
		seq_printf(m, "%s", buf_ptr);
		break;
	default:
		break;
	}
}

static void ima_show_template_data_binary(struct seq_file *m,
					  enum ima_show_type show,
					  enum data_formats datafmt,
					  struct ima_field_data *field_data)
{
	u32 len = (show == IMA_SHOW_BINARY_OLD_STRING_FMT) ?
	    strlen(field_data->data) : field_data->len;

	if (show != IMA_SHOW_BINARY_NO_FIELD_LEN)
		ima_putc(m, &len, sizeof(len));

	if (!len)
		return;

	ima_putc(m, field_data->data, len);
}

static void ima_show_template_field_data(struct seq_file *m,
					 enum ima_show_type show,
					 enum data_formats datafmt,
					 struct ima_field_data *field_data)
{
	switch (show) {
	case IMA_SHOW_ASCII:
		ima_show_template_data_ascii(m, show, datafmt, field_data);
		break;
	case IMA_SHOW_BINARY:
	case IMA_SHOW_BINARY_NO_FIELD_LEN:
	case IMA_SHOW_BINARY_OLD_STRING_FMT:
		ima_show_template_data_binary(m, show, datafmt, field_data);
		break;
	default:
		break;
	}
}

void ima_show_template_digest(struct seq_file *m, enum ima_show_type show,
			      struct ima_field_data *field_data)
{
	ima_show_template_field_data(m, show, DATA_FMT_DIGEST, field_data);
}

void ima_show_template_digest_ng(struct seq_file *m, enum ima_show_type show,
				 struct ima_field_data *field_data)
{
	ima_show_template_field_data(m, show, DATA_FMT_DIGEST_WITH_ALGO,
				     field_data);
}

void ima_show_template_string(struct seq_file *m, enum ima_show_type show,
			      struct ima_field_data *field_data)
{
	ima_show_template_field_data(m, show, DATA_FMT_STRING, field_data);
}

void ima_show_template_sig(struct seq_file *m, enum ima_show_type show,
			   struct ima_field_data *field_data)
{
	ima_show_template_field_data(m, show, DATA_FMT_HEX, field_data);
}

static int ima_eventdigest_init_common(u8 *digest, u32 digestsize, u8 hash_algo,
				       struct ima_field_data *field_data)
{
	/*
	 * digest formats:
	 *  - DATA_FMT_DIGEST: digest
	 *  - DATA_FMT_DIGEST_WITH_ALGO: [<hash algo>] + ':' + '\0' + digest,
	 *    where <hash algo> is provided if the hash algoritm is not
	 *    SHA1 or MD5
	 */
	u8 buffer[CRYPTO_MAX_ALG_NAME + 2 + IMA_MAX_DIGEST_SIZE] = { 0 };
	enum data_formats fmt = DATA_FMT_DIGEST;
	u32 offset = 0;

	if (hash_algo < HASH_ALGO__LAST) {
		fmt = DATA_FMT_DIGEST_WITH_ALGO;
		offset += snprintf(buffer, CRYPTO_MAX_ALG_NAME + 1, "%s",
				   hash_algo_name[hash_algo]);
		buffer[offset] = ':';
		offset += 2;
	}

	if (digest)
		memcpy(buffer + offset, digest, digestsize);
	else
		/*
		 * If digest is NULL, the event being recorded is a violation.
		 * Make room for the digest by increasing the offset of
		 * IMA_DIGEST_SIZE.
		 */
		offset += IMA_DIGEST_SIZE;

	return ima_write_template_field_data(buffer, offset + digestsize,
					     fmt, field_data);
}

/*
 * This function writes the digest of an event (with size limit).
 */
int ima_eventdigest_init(struct ima_event_data *event_data,
			 struct ima_field_data *field_data)
{
	struct {
		struct ima_digest_data hdr;
		char digest[IMA_MAX_DIGEST_SIZE];
	} hash;
	u8 *cur_digest = NULL;
	u32 cur_digestsize = 0;
	struct inode *inode;
	int result;

	memset(&hash, 0, sizeof(hash));

	if (event_data->violation)	/* recording a violation. */
		goto out;

	if (ima_template_hash_algo_allowed(event_data->iint->ima_hash->algo)) {
		cur_digest = event_data->iint->ima_hash->digest;
		cur_digestsize = event_data->iint->ima_hash->length;
		goto out;
	}

	if (!event_data->file)	/* missing info to re-calculate the digest */
		return -EINVAL;

	inode = file_inode(event_data->file);
	hash.hdr.algo = ima_template_hash_algo_allowed(ima_hash_algo) ?
	    ima_hash_algo : HASH_ALGO_SHA1;
	result = ima_calc_file_hash(event_data->file, &hash.hdr);
	if (result) {
		integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
				    event_data->filename, "collect_data",
				    "failed", result, 0);
		return result;
	}
	cur_digest = hash.hdr.digest;
	cur_digestsize = hash.hdr.length;
out:
	return ima_eventdigest_init_common(cur_digest, cur_digestsize,
					   HASH_ALGO__LAST, field_data);
}

/*
 * This function writes the digest of an event (without size limit).
 */
int ima_eventdigest_ng_init(struct ima_event_data *event_data,
			    struct ima_field_data *field_data)
{
	u8 *cur_digest = NULL, hash_algo = HASH_ALGO_SHA1;
	u32 cur_digestsize = 0;

	if (event_data->violation)	/* recording a violation. */
		goto out;

	cur_digest = event_data->iint->ima_hash->digest;
	cur_digestsize = event_data->iint->ima_hash->length;

	hash_algo = event_data->iint->ima_hash->algo;
out:
	return ima_eventdigest_init_common(cur_digest, cur_digestsize,
					   hash_algo, field_data);
}

static int ima_eventname_init_common(struct ima_event_data *event_data,
				     struct ima_field_data *field_data,
				     bool size_limit)
{
	const char *cur_filename = NULL;
	u32 cur_filename_len = 0;

	BUG_ON(event_data->filename == NULL && event_data->file == NULL);

	if (event_data->filename) {
		cur_filename = event_data->filename;
		cur_filename_len = strlen(event_data->filename);

		if (!size_limit || cur_filename_len <= IMA_EVENT_NAME_LEN_MAX)
			goto out;
	}

	if (event_data->file) {
		cur_filename = event_data->file->f_path.dentry->d_name.name;
		cur_filename_len = strlen(cur_filename);
	} else
		/*
		 * Truncate filename if the latter is too long and
		 * the file descriptor is not available.
		 */
		cur_filename_len = IMA_EVENT_NAME_LEN_MAX;
out:
	return ima_write_template_field_data(cur_filename, cur_filename_len,
					     DATA_FMT_STRING, field_data);
}

/*
 * This function writes the name of an event (with size limit).
 */
int ima_eventname_init(struct ima_event_data *event_data,
		       struct ima_field_data *field_data)
{
	return ima_eventname_init_common(event_data, field_data, true);
}

/*
 * This function writes the name of an event (without size limit).
 */
int ima_eventname_ng_init(struct ima_event_data *event_data,
			  struct ima_field_data *field_data)
{
	return ima_eventname_init_common(event_data, field_data, false);
}

/*
 *  ima_eventsig_init - include the file signature as part of the template data
 */
int ima_eventsig_init(struct ima_event_data *event_data,
		      struct ima_field_data *field_data)
{
	enum data_formats fmt = DATA_FMT_HEX;
	struct evm_ima_xattr_data *xattr_value = event_data->xattr_value;
	int xattr_len = event_data->xattr_len;
	int rc = 0;

	if ((!xattr_value) || (xattr_value->type != EVM_IMA_XATTR_DIGSIG))
		goto out;

	rc = ima_write_template_field_data(xattr_value, xattr_len, fmt,
					   field_data);
out:
	return rc;
}
Commit	Line	Data
3ce1217d RS	1	/*
	2	* Copyright (C) 2013 Politecnico di Torino, Italy
	3	* TORSEC group -- http://security.polito.it
	4	*
	5	* Author: Roberto Sassu <roberto.sassu@polito.it>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation, version 2 of the
	10	* License.
	11	*
	12	* File: ima_template_lib.c
	13	* Library of supported template fields.
	14	*/
4d7aeee7	15
3ce1217d RS	16	#include "ima_template_lib.h"
3ce1217d RS	17
4d7aeee7 RS	18	static bool ima_template_hash_algo_allowed(u8 algo)
	19	{
	20	if (algo == HASH_ALGO_SHA1 \|\| algo == HASH_ALGO_MD5)
	21	return true;
	22
	23	return false;
	24	}
	25
	26	enum data_formats {
	27	DATA_FMT_DIGEST = 0,
	28	DATA_FMT_DIGEST_WITH_ALGO,
bcbc9b0c MZ	29	DATA_FMT_STRING,
bcbc9b0c MZ	30	DATA_FMT_HEX
4d7aeee7 RS	31	};
4d7aeee7 RS	32
3ce1217d RS	33	static int ima_write_template_field_data(const void *data, const u32 datalen,
	34	enum data_formats datafmt,
	35	struct ima_field_data *field_data)
	36	{
	37	u8 buf, buf_ptr;
e3b64c26	38	u32 buflen = datalen;
3ce1217d	39
e3b64c26	40	if (datafmt == DATA_FMT_STRING)
3ce1217d	41	buflen = datalen + 1;
3ce1217d RS	42
	43	buf = kzalloc(buflen, GFP_KERNEL);
	44	if (!buf)
	45	return -ENOMEM;
	46
	47	memcpy(buf, data, datalen);
	48
	49	/*
	50	* Replace all space characters with underscore for event names and
	51	* strings. This avoid that, during the parsing of a measurements list,
	52	* filenames with spaces or that end with the suffix ' (deleted)' are
	53	* split into multiple template fields (the space is the delimitator
	54	* character for measurements lists in ASCII format).
	55	*/
e3b64c26	56	if (datafmt == DATA_FMT_STRING) {
3ce1217d RS	57	for (buf_ptr = buf; buf_ptr - buf < datalen; buf_ptr++)
	58	if (*buf_ptr == ' ')
	59	*buf_ptr = '_';
	60	}
	61
	62	field_data->data = buf;
	63	field_data->len = buflen;
	64	return 0;
	65	}
	66
	67	static void ima_show_template_data_ascii(struct seq_file *m,
	68	enum ima_show_type show,
	69	enum data_formats datafmt,
	70	struct ima_field_data *field_data)
	71	{
45b26133 MZ	72	u8 *buf_ptr = field_data->data;
45b26133 MZ	73	u32 buflen = field_data->len;
4d7aeee7	74
3ce1217d	75	switch (datafmt) {
4d7aeee7 RS	76	case DATA_FMT_DIGEST_WITH_ALGO:
	77	buf_ptr = strnchr(field_data->data, buflen, ':');
	78	if (buf_ptr != field_data->data)
	79	seq_printf(m, "%s", field_data->data);
	80
	81	/* skip ':' and '\0' */
	82	buf_ptr += 2;
	83	buflen -= buf_ptr - field_data->data;
3ce1217d	84	case DATA_FMT_DIGEST:
bcbc9b0c MZ	85	case DATA_FMT_HEX:
	86	if (!buflen)
	87	break;
4d7aeee7	88	ima_print_digest(m, buf_ptr, buflen);
3ce1217d RS	89	break;
3ce1217d RS	90	case DATA_FMT_STRING:
4d7aeee7	91	seq_printf(m, "%s", buf_ptr);
3ce1217d RS	92	break;
	93	default:
	94	break;
	95	}
	96	}
	97
	98	static void ima_show_template_data_binary(struct seq_file *m,
	99	enum ima_show_type show,
	100	enum data_formats datafmt,
	101	struct ima_field_data *field_data)
	102	{
c019e307 RS	103	u32 len = (show == IMA_SHOW_BINARY_OLD_STRING_FMT) ?
	104	strlen(field_data->data) : field_data->len;
	105
3e8e5503	106	if (show != IMA_SHOW_BINARY_NO_FIELD_LEN)
c019e307	107	ima_putc(m, &len, sizeof(len));
3e8e5503	108
c019e307	109	if (!len)
3ce1217d	110	return;
3e8e5503	111
c019e307	112	ima_putc(m, field_data->data, len);
3ce1217d RS	113	}
	114
	115	static void ima_show_template_field_data(struct seq_file *m,
	116	enum ima_show_type show,
	117	enum data_formats datafmt,
	118	struct ima_field_data *field_data)
	119	{
	120	switch (show) {
	121	case IMA_SHOW_ASCII:
	122	ima_show_template_data_ascii(m, show, datafmt, field_data);
	123	break;
	124	case IMA_SHOW_BINARY:
3e8e5503	125	case IMA_SHOW_BINARY_NO_FIELD_LEN:
c019e307	126	case IMA_SHOW_BINARY_OLD_STRING_FMT:
3ce1217d RS	127	ima_show_template_data_binary(m, show, datafmt, field_data);
	128	break;
	129	default:
	130	break;
	131	}
	132	}
	133
	134	void ima_show_template_digest(struct seq_file *m, enum ima_show_type show,
	135	struct ima_field_data *field_data)
	136	{
	137	ima_show_template_field_data(m, show, DATA_FMT_DIGEST, field_data);
	138	}
	139
4d7aeee7 RS	140	void ima_show_template_digest_ng(struct seq_file *m, enum ima_show_type show,
	141	struct ima_field_data *field_data)
	142	{
	143	ima_show_template_field_data(m, show, DATA_FMT_DIGEST_WITH_ALGO,
	144	field_data);
	145	}
	146
3ce1217d RS	147	void ima_show_template_string(struct seq_file *m, enum ima_show_type show,
	148	struct ima_field_data *field_data)
	149	{
	150	ima_show_template_field_data(m, show, DATA_FMT_STRING, field_data);
	151	}
	152
bcbc9b0c MZ	153	void ima_show_template_sig(struct seq_file *m, enum ima_show_type show,
	154	struct ima_field_data *field_data)
	155	{
	156	ima_show_template_field_data(m, show, DATA_FMT_HEX, field_data);
	157	}
	158
4d7aeee7	159	static int ima_eventdigest_init_common(u8 *digest, u32 digestsize, u8 hash_algo,
dcf4e392	160	struct ima_field_data *field_data)
4d7aeee7 RS	161	{
	162	/*
	163	* digest formats:
	164	* - DATA_FMT_DIGEST: digest
	165	* - DATA_FMT_DIGEST_WITH_ALGO: [<hash algo>] + ':' + '\0' + digest,
	166	* where <hash algo> is provided if the hash algoritm is not
	167	* SHA1 or MD5
	168	*/
	169	u8 buffer[CRYPTO_MAX_ALG_NAME + 2 + IMA_MAX_DIGEST_SIZE] = { 0 };
	170	enum data_formats fmt = DATA_FMT_DIGEST;
	171	u32 offset = 0;
	172
dcf4e392	173	if (hash_algo < HASH_ALGO__LAST) {
4d7aeee7	174	fmt = DATA_FMT_DIGEST_WITH_ALGO;
dcf4e392 RS	175	offset += snprintf(buffer, CRYPTO_MAX_ALG_NAME + 1, "%s",
dcf4e392 RS	176	hash_algo_name[hash_algo]);
4d7aeee7 RS	177	buffer[offset] = ':';
	178	offset += 2;
	179	}
	180
	181	if (digest)
	182	memcpy(buffer + offset, digest, digestsize);
	183	else
	184	/*
	185	* If digest is NULL, the event being recorded is a violation.
	186	* Make room for the digest by increasing the offset of
	187	* IMA_DIGEST_SIZE.
	188	*/
	189	offset += IMA_DIGEST_SIZE;
	190
	191	return ima_write_template_field_data(buffer, offset + digestsize,
	192	fmt, field_data);
	193	}
	194
3ce1217d	195	/*
4d7aeee7	196	* This function writes the digest of an event (with size limit).
3ce1217d	197	*/
23b57419	198	int ima_eventdigest_init(struct ima_event_data *event_data,
3ce1217d RS	199	struct ima_field_data *field_data)
	200	{
	201	struct {
	202	struct ima_digest_data hdr;
	203	char digest[IMA_MAX_DIGEST_SIZE];
	204	} hash;
4d7aeee7 RS	205	u8 *cur_digest = NULL;
4d7aeee7 RS	206	u32 cur_digestsize = 0;
3ce1217d RS	207	struct inode *inode;
	208	int result;
	209
	210	memset(&hash, 0, sizeof(hash));
	211
8d94eb9b	212	if (event_data->violation) /* recording a violation. */
3ce1217d RS	213	goto out;
3ce1217d RS	214
23b57419 RS	215	if (ima_template_hash_algo_allowed(event_data->iint->ima_hash->algo)) {
	216	cur_digest = event_data->iint->ima_hash->digest;
	217	cur_digestsize = event_data->iint->ima_hash->length;
3ce1217d RS	218	goto out;
	219	}
	220
23b57419	221	if (!event_data->file) /* missing info to re-calculate the digest */
3ce1217d RS	222	return -EINVAL;
3ce1217d RS	223
23b57419	224	inode = file_inode(event_data->file);
4d7aeee7 RS	225	hash.hdr.algo = ima_template_hash_algo_allowed(ima_hash_algo) ?
4d7aeee7 RS	226	ima_hash_algo : HASH_ALGO_SHA1;
23b57419	227	result = ima_calc_file_hash(event_data->file, &hash.hdr);
3ce1217d RS	228	if (result) {
3ce1217d RS	229	integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode,
23b57419	230	event_data->filename, "collect_data",
3ce1217d RS	231	"failed", result, 0);
	232	return result;
	233	}
4d7aeee7 RS	234	cur_digest = hash.hdr.digest;
4d7aeee7 RS	235	cur_digestsize = hash.hdr.length;
3ce1217d	236	out:
712a49bd	237	return ima_eventdigest_init_common(cur_digest, cur_digestsize,
dcf4e392	238	HASH_ALGO__LAST, field_data);
3ce1217d RS	239	}
	240
	241	/*
4d7aeee7	242	* This function writes the digest of an event (without size limit).
3ce1217d	243	*/
23b57419 RS	244	int ima_eventdigest_ng_init(struct ima_event_data *event_data,
23b57419 RS	245	struct ima_field_data *field_data)
4d7aeee7	246	{
c502c78b	247	u8 *cur_digest = NULL, hash_algo = HASH_ALGO_SHA1;
4d7aeee7 RS	248	u32 cur_digestsize = 0;
4d7aeee7 RS	249
8d94eb9b	250	if (event_data->violation) /* recording a violation. */
4d7aeee7 RS	251	goto out;
4d7aeee7 RS	252
23b57419 RS	253	cur_digest = event_data->iint->ima_hash->digest;
23b57419 RS	254	cur_digestsize = event_data->iint->ima_hash->length;
4d7aeee7	255
23b57419	256	hash_algo = event_data->iint->ima_hash->algo;
4d7aeee7 RS	257	out:
4d7aeee7 RS	258	return ima_eventdigest_init_common(cur_digest, cur_digestsize,
dcf4e392	259	hash_algo, field_data);
4d7aeee7 RS	260	}
4d7aeee7 RS	261
23b57419	262	static int ima_eventname_init_common(struct ima_event_data *event_data,
4d7aeee7 RS	263	struct ima_field_data *field_data,
4d7aeee7 RS	264	bool size_limit)
3ce1217d RS	265	{
	266	const char *cur_filename = NULL;
	267	u32 cur_filename_len = 0;
	268
23b57419	269	BUG_ON(event_data->filename == NULL && event_data->file == NULL);
3ce1217d	270
23b57419 RS	271	if (event_data->filename) {
	272	cur_filename = event_data->filename;
	273	cur_filename_len = strlen(event_data->filename);
3ce1217d	274
4d7aeee7	275	if (!size_limit \|\| cur_filename_len <= IMA_EVENT_NAME_LEN_MAX)
3ce1217d RS	276	goto out;
	277	}
	278
23b57419 RS	279	if (event_data->file) {
23b57419 RS	280	cur_filename = event_data->file->f_path.dentry->d_name.name;
3ce1217d RS	281	cur_filename_len = strlen(cur_filename);
	282	} else
	283	/*
	284	* Truncate filename if the latter is too long and
	285	* the file descriptor is not available.
	286	*/
	287	cur_filename_len = IMA_EVENT_NAME_LEN_MAX;
	288	out:
	289	return ima_write_template_field_data(cur_filename, cur_filename_len,
e3b64c26	290	DATA_FMT_STRING, field_data);
4d7aeee7 RS	291	}
	292
	293	/*
	294	* This function writes the name of an event (with size limit).
	295	*/
23b57419	296	int ima_eventname_init(struct ima_event_data *event_data,
4d7aeee7 RS	297	struct ima_field_data *field_data)
4d7aeee7 RS	298	{
23b57419	299	return ima_eventname_init_common(event_data, field_data, true);
4d7aeee7 RS	300	}
	301
	302	/*
	303	* This function writes the name of an event (without size limit).
	304	*/
23b57419	305	int ima_eventname_ng_init(struct ima_event_data *event_data,
4d7aeee7 RS	306	struct ima_field_data *field_data)
4d7aeee7 RS	307	{
23b57419	308	return ima_eventname_init_common(event_data, field_data, false);
3ce1217d	309	}
bcbc9b0c MZ	310
	311	/*
	312	* ima_eventsig_init - include the file signature as part of the template data
	313	*/
23b57419	314	int ima_eventsig_init(struct ima_event_data *event_data,
bcbc9b0c MZ	315	struct ima_field_data *field_data)
	316	{
	317	enum data_formats fmt = DATA_FMT_HEX;
23b57419 RS	318	struct evm_ima_xattr_data *xattr_value = event_data->xattr_value;
23b57419 RS	319	int xattr_len = event_data->xattr_len;
bcbc9b0c MZ	320	int rc = 0;
	321
	322	if ((!xattr_value) \|\| (xattr_value->type != EVM_IMA_XATTR_DIGSIG))
	323	goto out;
	324
	325	rc = ima_write_template_field_data(xattr_value, xattr_len, fmt,
	326	field_data);
	327	out:
	328	return rc;
	329	}