[people/ms/u-boot.git] / tools / image-host.c

/*
 * Copyright (c) 2013, Google Inc.
 *
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include "mkimage.h"
#include <bootstage.h>
#include <image.h>
#include <sha1.h>
#include <time.h>
#include <u-boot/crc.h>
#include <u-boot/md5.h>

/**
 * fit_set_hashes - process FIT component image nodes and calculate hashes
 * @fit: pointer to the FIT format image header
 *
 * fit_set_hashes() adds hash values for all component images in the FIT blob.
 * Hashes are calculated for all component images which have hash subnodes
 * with algorithm property set to one of the supported hash algorithms.
 *
 * returns
 *     0, on success
 *     libfdt error code, on failure
 */
int fit_set_hashes(void *fit)
{
	int images_noffset;
	int noffset;
	int ndepth;
	int ret;

	/* Find images parent node offset */
	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
	if (images_noffset < 0) {
		printf("Can't find images parent node '%s' (%s)\n",
		       FIT_IMAGES_PATH, fdt_strerror(images_noffset));
		return images_noffset;
	}

	/* Process its subnodes, print out component images details */
	for (ndepth = 0, noffset = fdt_next_node(fit, images_noffset, &ndepth);
	     (noffset >= 0) && (ndepth > 0);
	     noffset = fdt_next_node(fit, noffset, &ndepth)) {
		if (ndepth == 1) {
			/*
			 * Direct child node of the images parent node,
			 * i.e. component image node.
			 */
			ret = fit_image_set_hashes(fit, noffset);
			if (ret)
				return ret;
		}
	}

	return 0;
}

/**
 * fit_image_process_hash - Process a single subnode of the images/ node
 *
 * Check each subnode and process accordingly. For hash nodes we generate
 * a hash of the supplised data and store it in the node.
 *
 * @fit:	pointer to the FIT format image header
 * @image_name:	name of image being processes (used to display errors)
 * @noffset:	subnode offset
 * @data:	data to process
 * @size:	size of data in bytes
 * @return 0 if ok, -1 on error
 */
static int fit_image_process_hash(void *fit, const char *image_name,
		int noffset, const void *data, size_t size)
{
	uint8_t value[FIT_MAX_HASH_LEN];
	int value_len;
	char *algo;

	/*
	 * Check subnode name, must be equal to "hash".
	 * Multiple hash nodes require unique unit node
	 * names, e.g. hash@1, hash@2, etc.
	 */
	if (strncmp(fit_get_name(fit, noffset, NULL),
		    FIT_HASH_NODENAME, strlen(FIT_HASH_NODENAME)) != 0)
		return 0;

	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
		printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
		       fit_get_name(fit, noffset, NULL), image_name);
		return -1;
	}

	if (calculate_hash(data, size, algo, value, &value_len)) {
		printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
		       algo, fit_get_name(fit, noffset, NULL), image_name);
		return -1;
	}

	if (fit_image_hash_set_value(fit, noffset, value, value_len)) {
		printf("Can't set hash value for '%s' hash node in '%s' image node\n",
		       fit_get_name(fit, noffset, NULL), image_name);
		return -1;
	}

	return 0;
}

/**
 * fit_image_set_hashes - calculate/set hashes for given component image node
 * @fit: pointer to the FIT format image header
 * @image_noffset: requested component image node
 *
 * fit_image_set_hashes() adds hash values for an component image node. All
 * existing hash subnodes are checked, if algorithm property is set to one of
 * the supported hash algorithms, hash value is computed and corresponding
 * hash node property is set, for example:
 *
 * Input component image node structure:
 *
 * o image@1 (at image_noffset)
 *   | - data = [binary data]
 *   o hash@1
 *     |- algo = "sha1"
 *
 * Output component image node structure:
 *
 * o image@1 (at image_noffset)
 *   | - data = [binary data]
 *   o hash@1
 *     |- algo = "sha1"
 *     |- value = sha1(data)
 *
 * returns:
 *     0 on sucess
 *    <0 on failure
 */
int fit_image_set_hashes(void *fit, int image_noffset)
{
	const void *data;
	size_t size;
	int noffset;
	int ndepth;
	const char *image_name;

	/* Get image data and data length */
	if (fit_image_get_data(fit, image_noffset, &data, &size)) {
		printf("Can't get image data/size\n");
		return -1;
	}

	image_name = fit_get_name(fit, image_noffset, NULL);

	/* Process all hash subnodes of the component image node */
	for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth);
			(noffset >= 0) && (ndepth > 0);
			noffset = fdt_next_node(fit, noffset, &ndepth)) {
		if (ndepth == 1) {
			/* Direct child node of the component image node */
			if (fit_image_process_hash(fit, image_name, noffset,
						   data, size))
				return -1;
		}
	}

	return 0;
}

/**
 * fit_image_hash_set_value - set hash value in requested has node
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @value: hash value to be set
 * @value_len: hash value length
 *
 * fit_image_hash_set_value() attempts to set hash value in a node at offset
 * given and returns operation status to the caller.
 *
 * returns
 *     0, on success
 *     -1, on failure
 */
int fit_image_hash_set_value(void *fit, int noffset, uint8_t *value,
				int value_len)
{
	int ret;

	ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
	if (ret) {
		printf("Can't set hash '%s' property for '%s' node(%s)\n",
		       FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
		       fdt_strerror(ret));
		return -1;
	}

	return 0;
}
Commit	Line	Data
604f23dd SG	1	/*
	2	* Copyright (c) 2013, Google Inc.
	3	*
	4	* (C) Copyright 2008 Semihalf
	5	*
	6	* (C) Copyright 2000-2006
	7	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	8	*
	9	* See file CREDITS for list of people who contributed to this
	10	* project.
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License as
	14	* published by the Free Software Foundation; either version 2 of
	15	* the License, or (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	25	* MA 02111-1307 USA
	26	*/
	27
	28	#include "mkimage.h"
	29	#include <bootstage.h>
	30	#include <image.h>
	31	#include <sha1.h>
	32	#include <time.h>
	33	#include <u-boot/crc.h>
	34	#include <u-boot/md5.h>
	35
	36	/**
	37	* fit_set_hashes - process FIT component image nodes and calculate hashes
	38	* @fit: pointer to the FIT format image header
	39	*
	40	* fit_set_hashes() adds hash values for all component images in the FIT blob.
	41	* Hashes are calculated for all component images which have hash subnodes
	42	* with algorithm property set to one of the supported hash algorithms.
	43	*
	44	* returns
	45	* 0, on success
	46	* libfdt error code, on failure
	47	*/
	48	int fit_set_hashes(void *fit)
	49	{
	50	int images_noffset;
	51	int noffset;
	52	int ndepth;
	53	int ret;
	54
	55	/* Find images parent node offset */
	56	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
	57	if (images_noffset < 0) {
	58	printf("Can't find images parent node '%s' (%s)\n",
	59	FIT_IMAGES_PATH, fdt_strerror(images_noffset));
	60	return images_noffset;
	61	}
	62
	63	/* Process its subnodes, print out component images details */
	64	for (ndepth = 0, noffset = fdt_next_node(fit, images_noffset, &ndepth);
65	(noffset >= 0) && (ndepth > 0);
66	noffset = fdt_next_node(fit, noffset, &ndepth)) {
67	if (ndepth == 1) {
68	/*
69	* Direct child node of the images parent node,
70	* i.e. component image node.
71	*/
72	ret = fit_image_set_hashes(fit, noffset);
73	if (ret)
74	return ret;
75	}
76	}
77
78	return 0;
79	}
80
94e5fa46 SG	81	/**
	82	* fit_image_process_hash - Process a single subnode of the images/ node
	83	*
	84	* Check each subnode and process accordingly. For hash nodes we generate
	85	* a hash of the supplised data and store it in the node.
	86	*
	87	* @fit: pointer to the FIT format image header
	88	* @image_name: name of image being processes (used to display errors)
	89	* @noffset: subnode offset
	90	* @data: data to process
	91	* @size: size of data in bytes
	92	* @return 0 if ok, -1 on error
	93	*/
	94	static int fit_image_process_hash(void fit, const char image_name,
	95	int noffset, const void *data, size_t size)
	96	{
	97	uint8_t value[FIT_MAX_HASH_LEN];
	98	int value_len;
	99	char *algo;
	100
	101	/*
	102	* Check subnode name, must be equal to "hash".
	103	* Multiple hash nodes require unique unit node
	104	* names, e.g. hash@1, hash@2, etc.
	105	*/
	106	if (strncmp(fit_get_name(fit, noffset, NULL),
	107	FIT_HASH_NODENAME, strlen(FIT_HASH_NODENAME)) != 0)
	108	return 0;
	109
	110	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
	111	printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
	112	fit_get_name(fit, noffset, NULL), image_name);
	113	return -1;
	114	}
	115
	116	if (calculate_hash(data, size, algo, value, &value_len)) {
	117	printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
	118	algo, fit_get_name(fit, noffset, NULL), image_name);
	119	return -1;
	120	}
	121
	122	if (fit_image_hash_set_value(fit, noffset, value, value_len)) {
	123	printf("Can't set hash value for '%s' hash node in '%s' image node\n",
	124	fit_get_name(fit, noffset, NULL), image_name);
	125	return -1;
	126	}
	127
	128	return 0;
	129	}
	130
604f23dd SG	131	/**
	132	* fit_image_set_hashes - calculate/set hashes for given component image node
	133	* @fit: pointer to the FIT format image header
	134	* @image_noffset: requested component image node
	135	*
	136	* fit_image_set_hashes() adds hash values for an component image node. All
	137	* existing hash subnodes are checked, if algorithm property is set to one of
	138	* the supported hash algorithms, hash value is computed and corresponding
	139	* hash node property is set, for example:
	140	*
	141	* Input component image node structure:
	142	*
	143	* o image@1 (at image_noffset)
	144	* \| - data = [binary data]
	145	* o hash@1
	146	* \|- algo = "sha1"
	147	*
	148	* Output component image node structure:
	149	*
	150	* o image@1 (at image_noffset)
	151	* \| - data = [binary data]
	152	* o hash@1
	153	* \|- algo = "sha1"
	154	* \|- value = sha1(data)
	155	*
	156	* returns:
	157	* 0 on sucess
	158	* <0 on failure
	159	*/
	160	int fit_image_set_hashes(void *fit, int image_noffset)
	161	{
	162	const void *data;
	163	size_t size;
604f23dd SG	164	int noffset;
604f23dd SG	165	int ndepth;
94e5fa46	166	const char *image_name;
604f23dd SG	167
	168	/* Get image data and data length */
	169	if (fit_image_get_data(fit, image_noffset, &data, &size)) {
	170	printf("Can't get image data/size\n");
	171	return -1;
	172	}
	173
94e5fa46 SG	174	image_name = fit_get_name(fit, image_noffset, NULL);
94e5fa46 SG	175
604f23dd SG	176	/* Process all hash subnodes of the component image node */
604f23dd SG	177	for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth);
94e5fa46 SG	178	(noffset >= 0) && (ndepth > 0);
94e5fa46 SG	179	noffset = fdt_next_node(fit, noffset, &ndepth)) {
604f23dd SG	180	if (ndepth == 1) {
604f23dd SG	181	/* Direct child node of the component image node */
94e5fa46 SG	182	if (fit_image_process_hash(fit, image_name, noffset,
94e5fa46 SG	183	data, size))
604f23dd	184	return -1;
604f23dd SG	185	}
	186	}
	187
	188	return 0;
	189	}
	190
	191	/**
	192	* fit_image_hash_set_value - set hash value in requested has node
	193	* @fit: pointer to the FIT format image header
	194	* @noffset: hash node offset
	195	* @value: hash value to be set
	196	* @value_len: hash value length
	197	*
	198	* fit_image_hash_set_value() attempts to set hash value in a node at offset
	199	* given and returns operation status to the caller.
	200	*
	201	* returns
	202	* 0, on success
	203	* -1, on failure
	204	*/
	205	int fit_image_hash_set_value(void fit, int noffset, uint8_t value,
	206	int value_len)
	207	{
	208	int ret;
	209
	210	ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
	211	if (ret) {
	212	printf("Can't set hash '%s' property for '%s' node(%s)\n",
	213	FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
	214	fdt_strerror(ret));
	215	return -1;
	216	}
	217
	218	return 0;
	219	}