[people/ms/u-boot.git] / common / hash.c

/*
 * Copyright (c) 2012 The Chromium OS Authors.
 *
 * (C) Copyright 2011
 * Joe Hershberger, National Instruments, joe.hershberger@ni.com
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <hw_sha.h>
#include <asm/io.h>
#include <asm/errno.h>
#else
#include "mkimage.h"
#include <time.h>
#include <image.h>
#endif /* !USE_HOSTCC*/

#include <hash.h>
#include <u-boot/crc.h>
#include <u-boot/sha1.h>
#include <u-boot/sha256.h>
#include <u-boot/md5.h>

#ifdef CONFIG_SHA1
static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
{
	sha1_context *ctx = malloc(sizeof(sha1_context));
	sha1_starts(ctx);
	*ctxp = ctx;
	return 0;
}

static int hash_update_sha1(struct hash_algo *algo, void *ctx, const void *buf,
			    unsigned int size, int is_last)
{
	sha1_update((sha1_context *)ctx, buf, size);
	return 0;
}

static int hash_finish_sha1(struct hash_algo *algo, void *ctx, void *dest_buf,
			    int size)
{
	if (size < algo->digest_size)
		return -1;

	sha1_finish((sha1_context *)ctx, dest_buf);
	free(ctx);
	return 0;
}
#endif

#ifdef CONFIG_SHA256
static int hash_init_sha256(struct hash_algo *algo, void **ctxp)
{
	sha256_context *ctx = malloc(sizeof(sha256_context));
	sha256_starts(ctx);
	*ctxp = ctx;
	return 0;
}

static int hash_update_sha256(struct hash_algo *algo, void *ctx,
			      const void *buf, unsigned int size, int is_last)
{
	sha256_update((sha256_context *)ctx, buf, size);
	return 0;
}

static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
			      *dest_buf, int size)
{
	if (size < algo->digest_size)
		return -1;

	sha256_finish((sha256_context *)ctx, dest_buf);
	free(ctx);
	return 0;
}
#endif

static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
{
	uint32_t *ctx = malloc(sizeof(uint32_t));
	*ctx = 0;
	*ctxp = ctx;
	return 0;
}

static int hash_update_crc32(struct hash_algo *algo, void *ctx,
			     const void *buf, unsigned int size, int is_last)
{
	*((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
	return 0;
}

static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
			     int size)
{
	if (size < algo->digest_size)
		return -1;

	*((uint32_t *)dest_buf) = *((uint32_t *)ctx);
	free(ctx);
	return 0;
}

/*
 * These are the hash algorithms we support. Chips which support accelerated
 * crypto could perhaps add named version of these algorithms here. Note that
 * algorithm names must be in lower case.
 */
static struct hash_algo hash_algo[] = {
	/*
	 * CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
	 * available.
	 */
#ifdef CONFIG_SHA_HW_ACCEL
	{
		"sha1",
		SHA1_SUM_LEN,
		hw_sha1,
		CHUNKSZ_SHA1,
	}, {
		"sha256",
		SHA256_SUM_LEN,
		hw_sha256,
		CHUNKSZ_SHA256,
	},
#endif
#ifdef CONFIG_SHA1
	{
		"sha1",
		SHA1_SUM_LEN,
		sha1_csum_wd,
		CHUNKSZ_SHA1,
		hash_init_sha1,
		hash_update_sha1,
		hash_finish_sha1,
	},
#endif
#ifdef CONFIG_SHA256
	{
		"sha256",
		SHA256_SUM_LEN,
		sha256_csum_wd,
		CHUNKSZ_SHA256,
		hash_init_sha256,
		hash_update_sha256,
		hash_finish_sha256,
	},
#endif
	{
		"crc32",
		4,
		crc32_wd_buf,
		CHUNKSZ_CRC32,
		hash_init_crc32,
		hash_update_crc32,
		hash_finish_crc32,
	},
};

#if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM)
#define MULTI_HASH
#endif

#if defined(CONFIG_HASH_VERIFY) || defined(CONFIG_CMD_HASH)
#define MULTI_HASH
#endif

/* Try to minimize code size for boards that don't want much hashing */
#ifdef MULTI_HASH
#define multi_hash()	1
#else
#define multi_hash()	0
#endif

int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
		if (!strcmp(algo_name, hash_algo[i].name)) {
			*algop = &hash_algo[i];
			return 0;
		}
	}

	debug("Unknown hash algorithm '%s'\n", algo_name);
	return -EPROTONOSUPPORT;
}

int hash_progressive_lookup_algo(const char *algo_name,
				 struct hash_algo **algop)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
		if (!strcmp(algo_name, hash_algo[i].name)) {
			if (hash_algo[i].hash_init) {
				*algop = &hash_algo[i];
				return 0;
			}
		}
	}

	debug("Unknown hash algorithm '%s'\n", algo_name);
	return -EPROTONOSUPPORT;
}

#ifndef USE_HOSTCC
/**
 * store_result: Store the resulting sum to an address or variable
 *
 * @algo:		Hash algorithm being used
 * @sum:		Hash digest (algo->digest_size bytes)
 * @dest:		Destination, interpreted as a hex address if it starts
 *			with * (or allow_env_vars is 0) or otherwise as an
 *			environment variable.
 * @allow_env_vars:	non-zero to permit storing the result to an
 *			variable environment
 */
static void store_result(struct hash_algo *algo, const uint8_t *sum,
			 const char *dest, int allow_env_vars)
{
	unsigned int i;
	int env_var = 0;

	/*
	 * If environment variables are allowed, then we assume that 'dest'
	 * is an environment variable, unless it starts with *, in which
	 * case we assume it is an address. If not allowed, it is always an
	 * address. This is to support the crc32 command.
	 */
	if (allow_env_vars) {
		if (*dest == '*')
			dest++;
		else
			env_var = 1;
	}

	if (env_var) {
		char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
		char *str_ptr = str_output;

		for (i = 0; i < algo->digest_size; i++) {
			sprintf(str_ptr, "%02x", sum[i]);
			str_ptr += 2;
		}
		*str_ptr = '\0';
		setenv(dest, str_output);
	} else {
		ulong addr;
		void *buf;

		addr = simple_strtoul(dest, NULL, 16);
		buf = map_sysmem(addr, algo->digest_size);
		memcpy(buf, sum, algo->digest_size);
		unmap_sysmem(buf);
	}
}

/**
 * parse_verify_sum: Parse a hash verification parameter
 *
 * @algo:		Hash algorithm being used
 * @verify_str:		Argument to parse. If it starts with * then it is
 *			interpreted as a hex address containing the hash.
 *			If the length is exactly the right number of hex digits
 *			for the digest size, then we assume it is a hex digest.
 *			Otherwise we assume it is an environment variable, and
 *			look up its value (it must contain a hex digest).
 * @vsum:		Returns binary digest value (algo->digest_size bytes)
 * @allow_env_vars:	non-zero to permit storing the result to an environment
 *			variable. If 0 then verify_str is assumed to be an
 *			address, and the * prefix is not expected.
 * @return 0 if ok, non-zero on error
 */
static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
			    uint8_t *vsum, int allow_env_vars)
{
	int env_var = 0;

	/* See comment above in store_result() */
	if (allow_env_vars) {
		if (*verify_str == '*')
			verify_str++;
		else
			env_var = 1;
	}

	if (!env_var) {
		ulong addr;
		void *buf;

		addr = simple_strtoul(verify_str, NULL, 16);
		buf = map_sysmem(addr, algo->digest_size);
		memcpy(vsum, buf, algo->digest_size);
	} else {
		unsigned int i;
		char *vsum_str;
		int digits = algo->digest_size * 2;

		/*
		 * As with the original code from sha1sum.c, we assume that a
		 * string which matches the digest size exactly is a hex
		 * string and not an environment variable.
		 */
		if (strlen(verify_str) == digits)
			vsum_str = verify_str;
		else {
			vsum_str = getenv(verify_str);
			if (vsum_str == NULL || strlen(vsum_str) != digits) {
				printf("Expected %d hex digits in env var\n",
				       digits);
				return 1;
			}
		}

		for (i = 0; i < algo->digest_size; i++) {
			char *nullp = vsum_str + (i + 1) * 2;
			char end = *nullp;

			*nullp = '\0';
			vsum[i] = simple_strtoul(vsum_str + (i * 2), NULL, 16);
			*nullp = end;
		}
	}
	return 0;
}

void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
{
	int i;

	printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
	for (i = 0; i < algo->digest_size; i++)
		printf("%02x", output[i]);
}

int hash_block(const char *algo_name, const void *data, unsigned int len,
	       uint8_t *output, int *output_size)
{
	struct hash_algo *algo;
	int ret;

	ret = hash_lookup_algo(algo_name, &algo);
	if (ret)
		return ret;

	if (output_size && *output_size < algo->digest_size) {
		debug("Output buffer size %d too small (need %d bytes)",
		      *output_size, algo->digest_size);
		return -ENOSPC;
	}
	if (output_size)
		*output_size = algo->digest_size;
	algo->hash_func_ws(data, len, output, algo->chunk_size);

	return 0;
}

int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
		 int argc, char * const argv[])
{
	ulong addr, len;

	if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
		return CMD_RET_USAGE;

	addr = simple_strtoul(*argv++, NULL, 16);
	len = simple_strtoul(*argv++, NULL, 16);

	if (multi_hash()) {
		struct hash_algo *algo;
		uint8_t output[HASH_MAX_DIGEST_SIZE];
		uint8_t vsum[HASH_MAX_DIGEST_SIZE];
		void *buf;

		if (hash_lookup_algo(algo_name, &algo)) {
			printf("Unknown hash algorithm '%s'\n", algo_name);
			return CMD_RET_USAGE;
		}
		argc -= 2;

		if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
			puts("HASH_MAX_DIGEST_SIZE exceeded\n");
			return 1;
		}

		buf = map_sysmem(addr, len);
		algo->hash_func_ws(buf, len, output, algo->chunk_size);
		unmap_sysmem(buf);

		/* Try to avoid code bloat when verify is not needed */
#ifdef CONFIG_HASH_VERIFY
		if (flags & HASH_FLAG_VERIFY) {
#else
		if (0) {
#endif
			if (parse_verify_sum(algo, *argv, vsum,
					flags & HASH_FLAG_ENV)) {
				printf("ERROR: %s does not contain a valid "
					"%s sum\n", *argv, algo->name);
				return 1;
			}
			if (memcmp(output, vsum, algo->digest_size) != 0) {
				int i;

				hash_show(algo, addr, len, output);
				printf(" != ");
				for (i = 0; i < algo->digest_size; i++)
					printf("%02x", vsum[i]);
				puts(" ** ERROR **\n");
				return 1;
			}
		} else {
			hash_show(algo, addr, len, output);
			printf("\n");

			if (argc) {
				store_result(algo, output, *argv,
					flags & HASH_FLAG_ENV);
			}
		}

	/* Horrible code size hack for boards that just want crc32 */
	} else {
		ulong crc;
		ulong *ptr;

		crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);

		printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
				addr, addr + len - 1, crc);

		if (argc >= 3) {
			ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
			*ptr = crc;
		}
	}

	return 0;
}
#endif
Commit	Line	Data
460408ef SG	1	/*
	2	* Copyright (c) 2012 The Chromium OS Authors.
	3	*
	4	* (C) Copyright 2011
	5	* Joe Hershberger, National Instruments, joe.hershberger@ni.com
	6	*
	7	* (C) Copyright 2000
	8	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	9	*
1a459660	10	* SPDX-License-Identifier: GPL-2.0+
460408ef SG	11	*/
460408ef SG	12
2dd90027	13	#ifndef USE_HOSTCC
460408ef SG	14	#include <common.h>
460408ef SG	15	#include <command.h>
bf007ebb	16	#include <malloc.h>
1f9c9280	17	#include <hw_sha.h>
2dd90027 RG	18	#include <asm/io.h>
	19	#include <asm/errno.h>
	20	#else
	21	#include "mkimage.h"
	22	#include <time.h>
	23	#include <image.h>
	24	#endif /* !USE_HOSTCC*/
	25
460408ef	26	#include <hash.h>
2dd90027	27	#include <u-boot/crc.h>
2b9912e6 JH	28	#include <u-boot/sha1.h>
2b9912e6 JH	29	#include <u-boot/sha256.h>
2dd90027	30	#include <u-boot/md5.h>
460408ef	31
46fe2c04	32	#ifdef CONFIG_SHA1
bf007ebb HT	33	static int hash_init_sha1(struct hash_algo algo, void *ctxp)
	34	{
	35	sha1_context *ctx = malloc(sizeof(sha1_context));
	36	sha1_starts(ctx);
	37	*ctxp = ctx;
	38	return 0;
	39	}
	40
	41	static int hash_update_sha1(struct hash_algo algo, void ctx, const void *buf,
	42	unsigned int size, int is_last)
	43	{
	44	sha1_update((sha1_context *)ctx, buf, size);
	45	return 0;
	46	}
	47
	48	static int hash_finish_sha1(struct hash_algo algo, void ctx, void *dest_buf,
	49	int size)
	50	{
	51	if (size < algo->digest_size)
	52	return -1;
	53
	54	sha1_finish((sha1_context *)ctx, dest_buf);
	55	free(ctx);
	56	return 0;
	57	}
	58	#endif
	59
	60	#ifdef CONFIG_SHA256
	61	static int hash_init_sha256(struct hash_algo algo, void *ctxp)
	62	{
	63	sha256_context *ctx = malloc(sizeof(sha256_context));
	64	sha256_starts(ctx);
	65	*ctxp = ctx;
	66	return 0;
	67	}
	68
	69	static int hash_update_sha256(struct hash_algo algo, void ctx,
	70	const void *buf, unsigned int size, int is_last)
	71	{
	72	sha256_update((sha256_context *)ctx, buf, size);
	73	return 0;
	74	}
	75
	76	static int hash_finish_sha256(struct hash_algo algo, void ctx, void
	77	*dest_buf, int size)
	78	{
	79	if (size < algo->digest_size)
	80	return -1;
	81
	82	sha256_finish((sha256_context *)ctx, dest_buf);
	83	free(ctx);
	84	return 0;
	85	}
	86	#endif
	87
	88	static int hash_init_crc32(struct hash_algo algo, void *ctxp)
	89	{
	90	uint32_t *ctx = malloc(sizeof(uint32_t));
	91	*ctx = 0;
	92	*ctxp = ctx;
	93	return 0;
	94	}
	95
	96	static int hash_update_crc32(struct hash_algo algo, void ctx,
97	const void *buf, unsigned int size, int is_last)
98	{
99	((uint32_t )ctx) = crc32(((uint32_t )ctx), buf, size);
100	return 0;
101	}
102
103	static int hash_finish_crc32(struct hash_algo algo, void ctx, void *dest_buf,
104	int size)
105	{
106	if (size < algo->digest_size)
107	return -1;
108
109	((uint32_t )dest_buf) = ((uint32_t )ctx);
110	free(ctx);
111	return 0;
112	}
113
460408ef SG	114	/*
460408ef SG	115	* These are the hash algorithms we support. Chips which support accelerated
218da0f3 SG	116	* crypto could perhaps add named version of these algorithms here. Note that
218da0f3 SG	117	* algorithm names must be in lower case.
460408ef SG	118	*/
460408ef SG	119	static struct hash_algo hash_algo[] = {
1f9c9280 AS	120	/*
	121	* CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
	122	* available.
	123	*/
	124	#ifdef CONFIG_SHA_HW_ACCEL
	125	{
	126	"sha1",
	127	SHA1_SUM_LEN,
	128	hw_sha1,
	129	CHUNKSZ_SHA1,
	130	}, {
	131	"sha256",
	132	SHA256_SUM_LEN,
	133	hw_sha256,
	134	CHUNKSZ_SHA256,
	135	},
	136	#endif
46fe2c04	137	#ifdef CONFIG_SHA1
460408ef	138	{
218da0f3	139	"sha1",
460408ef SG	140	SHA1_SUM_LEN,
	141	sha1_csum_wd,
	142	CHUNKSZ_SHA1,
bf007ebb HT	143	hash_init_sha1,
	144	hash_update_sha1,
	145	hash_finish_sha1,
460408ef SG	146	},
	147	#endif
	148	#ifdef CONFIG_SHA256
	149	{
218da0f3	150	"sha256",
460408ef SG	151	SHA256_SUM_LEN,
	152	sha256_csum_wd,
	153	CHUNKSZ_SHA256,
bf007ebb HT	154	hash_init_sha256,
	155	hash_update_sha256,
	156	hash_finish_sha256,
460408ef SG	157	},
460408ef SG	158	#endif
d20a40de	159	{
218da0f3	160	"crc32",
d20a40de SG	161	4,
	162	crc32_wd_buf,
	163	CHUNKSZ_CRC32,
bf007ebb HT	164	hash_init_crc32,
	165	hash_update_crc32,
	166	hash_finish_crc32,
d20a40de	167	},
460408ef SG	168	};
460408ef SG	169
46fe2c04 RG	170	#if defined(CONFIG_SHA256) \|\| defined(CONFIG_CMD_SHA1SUM)
	171	#define MULTI_HASH
	172	#endif
	173
d20a40de SG	174	#if defined(CONFIG_HASH_VERIFY) \|\| defined(CONFIG_CMD_HASH)
	175	#define MULTI_HASH
	176	#endif
	177
	178	/* Try to minimize code size for boards that don't want much hashing */
	179	#ifdef MULTI_HASH
	180	#define multi_hash() 1
	181	#else
	182	#define multi_hash() 0
	183	#endif
	184
2dd90027 RG	185	int hash_lookup_algo(const char algo_name, struct hash_algo *algop)
	186	{
	187	int i;
	188
	189	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	190	if (!strcmp(algo_name, hash_algo[i].name)) {
	191	*algop = &hash_algo[i];
	192	return 0;
	193	}
	194	}
	195
	196	debug("Unknown hash algorithm '%s'\n", algo_name);
	197	return -EPROTONOSUPPORT;
	198	}
	199
	200	int hash_progressive_lookup_algo(const char *algo_name,
	201	struct hash_algo **algop)
	202	{
	203	int i;
	204
	205	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	206	if (!strcmp(algo_name, hash_algo[i].name)) {
	207	if (hash_algo[i].hash_init) {
	208	*algop = &hash_algo[i];
	209	return 0;
	210	}
	211	}
	212	}
	213
	214	debug("Unknown hash algorithm '%s'\n", algo_name);
	215	return -EPROTONOSUPPORT;
	216	}
	217
	218	#ifndef USE_HOSTCC
460408ef SG	219	/**
	220	* store_result: Store the resulting sum to an address or variable
	221	*
	222	* @algo: Hash algorithm being used
	223	* @sum: Hash digest (algo->digest_size bytes)
	224	* @dest: Destination, interpreted as a hex address if it starts
d5b76673 SG	225	* with * (or allow_env_vars is 0) or otherwise as an
	226	* environment variable.
	227	* @allow_env_vars: non-zero to permit storing the result to an
	228	* variable environment
460408ef	229	*/
04819a4f	230	static void store_result(struct hash_algo algo, const uint8_t sum,
d5b76673	231	const char *dest, int allow_env_vars)
460408ef SG	232	{
460408ef SG	233	unsigned int i;
d5b76673	234	int env_var = 0;
460408ef	235
d5b76673 SG	236	/*
	237	* If environment variables are allowed, then we assume that 'dest'
	238	* is an environment variable, unless it starts with *, in which
	239	* case we assume it is an address. If not allowed, it is always an
	240	* address. This is to support the crc32 command.
	241	*/
	242	if (allow_env_vars) {
	243	if (dest == '')
	244	dest++;
	245	else
	246	env_var = 1;
	247	}
460408ef	248
d5b76673	249	if (env_var) {
460408ef SG	250	char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
	251	char *str_ptr = str_output;
	252
	253	for (i = 0; i < algo->digest_size; i++) {
	254	sprintf(str_ptr, "%02x", sum[i]);
	255	str_ptr += 2;
	256	}
8b9cc866	257	*str_ptr = '\0';
460408ef	258	setenv(dest, str_output);
d5b76673	259	} else {
bd091b67 SG	260	ulong addr;
bd091b67 SG	261	void *buf;
d5b76673	262
bd091b67 SG	263	addr = simple_strtoul(dest, NULL, 16);
	264	buf = map_sysmem(addr, algo->digest_size);
	265	memcpy(buf, sum, algo->digest_size);
	266	unmap_sysmem(buf);
460408ef SG	267	}
	268	}
	269
	270	/**
	271	* parse_verify_sum: Parse a hash verification parameter
	272	*
	273	* @algo: Hash algorithm being used
	274	* @verify_str: Argument to parse. If it starts with * then it is
	275	* interpreted as a hex address containing the hash.
	276	* If the length is exactly the right number of hex digits
	277	* for the digest size, then we assume it is a hex digest.
	278	* Otherwise we assume it is an environment variable, and
	279	* look up its value (it must contain a hex digest).
	280	* @vsum: Returns binary digest value (algo->digest_size bytes)
d5b76673 SG	281	* @allow_env_vars: non-zero to permit storing the result to an environment
	282	* variable. If 0 then verify_str is assumed to be an
	283	* address, and the * prefix is not expected.
460408ef SG	284	* @return 0 if ok, non-zero on error
460408ef SG	285	*/
04819a4f SG	286	static int parse_verify_sum(struct hash_algo algo, char verify_str,
04819a4f SG	287	uint8_t *vsum, int allow_env_vars)
460408ef	288	{
d5b76673 SG	289	int env_var = 0;
	290
	291	/* See comment above in store_result() */
	292	if (allow_env_vars) {
	293	if (verify_str == '')
	294	verify_str++;
	295	else
	296	env_var = 1;
	297	}
	298
3ef46a99	299	if (!env_var) {
bd091b67 SG	300	ulong addr;
bd091b67 SG	301	void *buf;
460408ef	302
bd091b67 SG	303	addr = simple_strtoul(verify_str, NULL, 16);
	304	buf = map_sysmem(addr, algo->digest_size);
	305	memcpy(vsum, buf, algo->digest_size);
460408ef SG	306	} else {
	307	unsigned int i;
	308	char *vsum_str;
	309	int digits = algo->digest_size * 2;
	310
	311	/*
	312	* As with the original code from sha1sum.c, we assume that a
	313	* string which matches the digest size exactly is a hex
	314	* string and not an environment variable.
	315	*/
	316	if (strlen(verify_str) == digits)
	317	vsum_str = verify_str;
	318	else {
	319	vsum_str = getenv(verify_str);
	320	if (vsum_str == NULL \|\| strlen(vsum_str) != digits) {
	321	printf("Expected %d hex digits in env var\n",
	322	digits);
	323	return 1;
	324	}
	325	}
	326
	327	for (i = 0; i < algo->digest_size; i++) {
	328	char nullp = vsum_str + (i + 1) 2;
	329	char end = *nullp;
	330
	331	*nullp = '\0';
	332	vsum[i] = simple_strtoul(vsum_str + (i * 2), NULL, 16);
	333	*nullp = end;
	334	}
	335	}
	336	return 0;
	337	}
	338
04819a4f	339	void hash_show(struct hash_algo algo, ulong addr, ulong len, uint8_t output)
460408ef SG	340	{
	341	int i;
	342
	343	printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
	344	for (i = 0; i < algo->digest_size; i++)
	345	printf("%02x", output[i]);
	346	}
	347
6f907b42 SG	348	int hash_block(const char algo_name, const void data, unsigned int len,
	349	uint8_t output, int output_size)
	350	{
	351	struct hash_algo *algo;
bf007ebb HT	352	int ret;
	353
	354	ret = hash_lookup_algo(algo_name, &algo);
	355	if (ret)
	356	return ret;
6f907b42	357
6f907b42 SG	358	if (output_size && *output_size < algo->digest_size) {
	359	debug("Output buffer size %d too small (need %d bytes)",
	360	*output_size, algo->digest_size);
	361	return -ENOSPC;
	362	}
	363	if (output_size)
	364	*output_size = algo->digest_size;
	365	algo->hash_func_ws(data, len, output, algo->chunk_size);
	366
	367	return 0;
	368	}
	369
d5b76673	370	int hash_command(const char algo_name, int flags, cmd_tbl_t cmdtp, int flag,
460408ef SG	371	int argc, char * const argv[])
460408ef SG	372	{
460408ef	373	ulong addr, len;
460408ef	374
3ef46a99	375	if ((argc < 2) \|\| ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
460408ef SG	376	return CMD_RET_USAGE;
460408ef SG	377
d5b76673 SG	378	addr = simple_strtoul(*argv++, NULL, 16);
	379	len = simple_strtoul(*argv++, NULL, 16);
	380
d20a40de SG	381	if (multi_hash()) {
d20a40de SG	382	struct hash_algo *algo;
04819a4f SG	383	uint8_t output[HASH_MAX_DIGEST_SIZE];
04819a4f SG	384	uint8_t vsum[HASH_MAX_DIGEST_SIZE];
bd091b67	385	void *buf;
460408ef	386
bf007ebb	387	if (hash_lookup_algo(algo_name, &algo)) {
d20a40de SG	388	printf("Unknown hash algorithm '%s'\n", algo_name);
	389	return CMD_RET_USAGE;
	390	}
	391	argc -= 2;
	392
	393	if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
	394	puts("HASH_MAX_DIGEST_SIZE exceeded\n");
	395	return 1;
	396	}
460408ef	397
bd091b67 SG	398	buf = map_sysmem(addr, len);
	399	algo->hash_func_ws(buf, len, output, algo->chunk_size);
	400	unmap_sysmem(buf);
460408ef	401
d20a40de	402	/* Try to avoid code bloat when verify is not needed */
460408ef	403	#ifdef CONFIG_HASH_VERIFY
d20a40de	404	if (flags & HASH_FLAG_VERIFY) {
460408ef	405	#else
d20a40de	406	if (0) {
460408ef	407	#endif
d20a40de	408	if (parse_verify_sum(algo, *argv, vsum,
d5b76673	409	flags & HASH_FLAG_ENV)) {
d20a40de SG	410	printf("ERROR: %s does not contain a valid "
	411	"%s sum\n", *argv, algo->name);
	412	return 1;
	413	}
	414	if (memcmp(output, vsum, algo->digest_size) != 0) {
	415	int i;
460408ef	416
31890ae2	417	hash_show(algo, addr, len, output);
d20a40de SG	418	printf(" != ");
	419	for (i = 0; i < algo->digest_size; i++)
	420	printf("%02x", vsum[i]);
	421	puts(" ERROR \n");
	422	return 1;
	423	}
	424	} else {
31890ae2	425	hash_show(algo, addr, len, output);
d20a40de SG	426	printf("\n");
	427
	428	if (argc) {
	429	store_result(algo, output, *argv,
	430	flags & HASH_FLAG_ENV);
	431	}
460408ef	432	}
d20a40de SG	433
d20a40de SG	434	/* Horrible code size hack for boards that just want crc32 */
460408ef	435	} else {
d20a40de SG	436	ulong crc;
	437	ulong *ptr;
	438
	439	crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
	440
	441	printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
	442	addr, addr + len - 1, crc);
460408ef	443
4b756b01 TR	444	if (argc >= 3) {
4b756b01 TR	445	ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
d20a40de	446	*ptr = crc;
d5b76673	447	}
460408ef SG	448	}
	449
	450	return 0;
	451	}
2dd90027	452	#endif