[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_set_hash_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_set_hash_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
 */
static int fit_set_hash_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;
}

/**
 * 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_set_hash_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;
}
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
b7260910 SG	81	/**
	82	* fit_set_hash_value - set hash value in requested has node
	83	* @fit: pointer to the FIT format image header
	84	* @noffset: hash node offset
	85	* @value: hash value to be set
	86	* @value_len: hash value length
	87	*
	88	* fit_set_hash_value() attempts to set hash value in a node at offset
	89	* given and returns operation status to the caller.
	90	*
	91	* returns
	92	* 0, on success
	93	* -1, on failure
	94	*/
	95	static int fit_set_hash_value(void fit, int noffset, uint8_t value,
	96	int value_len)
	97	{
	98	int ret;
	99
	100	ret = fdt_setprop(fit, noffset, FIT_VALUE_PROP, value, value_len);
	101	if (ret) {
	102	printf("Can't set hash '%s' property for '%s' node(%s)\n",
	103	FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
	104	fdt_strerror(ret));
	105	return -1;
	106	}
	107
	108	return 0;
	109	}
	110
94e5fa46 SG	111	/**
	112	* fit_image_process_hash - Process a single subnode of the images/ node
	113	*
	114	* Check each subnode and process accordingly. For hash nodes we generate
	115	* a hash of the supplised data and store it in the node.
	116	*
	117	* @fit: pointer to the FIT format image header
	118	* @image_name: name of image being processes (used to display errors)
	119	* @noffset: subnode offset
	120	* @data: data to process
	121	* @size: size of data in bytes
	122	* @return 0 if ok, -1 on error
	123	*/
	124	static int fit_image_process_hash(void fit, const char image_name,
	125	int noffset, const void *data, size_t size)
	126	{
	127	uint8_t value[FIT_MAX_HASH_LEN];
	128	int value_len;
	129	char *algo;
	130
	131	/*
	132	* Check subnode name, must be equal to "hash".
	133	* Multiple hash nodes require unique unit node
	134	* names, e.g. hash@1, hash@2, etc.
	135	*/
	136	if (strncmp(fit_get_name(fit, noffset, NULL),
	137	FIT_HASH_NODENAME, strlen(FIT_HASH_NODENAME)) != 0)
	138	return 0;
	139
	140	if (fit_image_hash_get_algo(fit, noffset, &algo)) {
	141	printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
	142	fit_get_name(fit, noffset, NULL), image_name);
	143	return -1;
	144	}
	145
	146	if (calculate_hash(data, size, algo, value, &value_len)) {
	147	printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
	148	algo, fit_get_name(fit, noffset, NULL), image_name);
	149	return -1;
	150	}
	151
b7260910	152	if (fit_set_hash_value(fit, noffset, value, value_len)) {
94e5fa46 SG	153	printf("Can't set hash value for '%s' hash node in '%s' image node\n",
	154	fit_get_name(fit, noffset, NULL), image_name);
	155	return -1;
	156	}
	157
	158	return 0;
	159	}
	160
604f23dd SG	161	/**
	162	* fit_image_set_hashes - calculate/set hashes for given component image node
	163	* @fit: pointer to the FIT format image header
	164	* @image_noffset: requested component image node
	165	*
	166	* fit_image_set_hashes() adds hash values for an component image node. All
	167	* existing hash subnodes are checked, if algorithm property is set to one of
	168	* the supported hash algorithms, hash value is computed and corresponding
	169	* hash node property is set, for example:
	170	*
	171	* Input component image node structure:
	172	*
	173	* o image@1 (at image_noffset)
	174	* \| - data = [binary data]
	175	* o hash@1
	176	* \|- algo = "sha1"
	177	*
	178	* Output component image node structure:
	179	*
	180	* o image@1 (at image_noffset)
	181	* \| - data = [binary data]
	182	* o hash@1
	183	* \|- algo = "sha1"
	184	* \|- value = sha1(data)
	185	*
	186	* returns:
	187	* 0 on sucess
	188	* <0 on failure
	189	*/
	190	int fit_image_set_hashes(void *fit, int image_noffset)
	191	{
	192	const void *data;
	193	size_t size;
604f23dd SG	194	int noffset;
604f23dd SG	195	int ndepth;
94e5fa46	196	const char *image_name;
604f23dd SG	197
	198	/* Get image data and data length */
	199	if (fit_image_get_data(fit, image_noffset, &data, &size)) {
	200	printf("Can't get image data/size\n");
	201	return -1;
	202	}
	203
94e5fa46 SG	204	image_name = fit_get_name(fit, image_noffset, NULL);
94e5fa46 SG	205
604f23dd SG	206	/* Process all hash subnodes of the component image node */
604f23dd SG	207	for (ndepth = 0, noffset = fdt_next_node(fit, image_noffset, &ndepth);
94e5fa46 SG	208	(noffset >= 0) && (ndepth > 0);
94e5fa46 SG	209	noffset = fdt_next_node(fit, noffset, &ndepth)) {
604f23dd SG	210	if (ndepth == 1) {
604f23dd SG	211	/* Direct child node of the component image node */
94e5fa46 SG	212	if (fit_image_process_hash(fit, image_name, noffset,
94e5fa46 SG	213	data, size))
604f23dd	214	return -1;
604f23dd SG	215	}
	216	}
	217
	218	return 0;
	219	}