[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 <mapmem.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,
#ifdef CONFIG_SHA_PROG_HW_ACCEL
		hw_sha_init,
		hw_sha_update,
		hw_sha_finish,
#endif
	}, {
		"sha256",
		SHA256_SUM_LEN,
		hw_sha256,
		CHUNKSZ_SHA256,
#ifdef CONFIG_SHA_PROG_HW_ACCEL
		hw_sha_init,
		hw_sha_update,
		hw_sha_finish,
#endif
	},
#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
int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
{
	struct hash_algo *algo;
	int ret;
	int i;

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

	for (i = 0; i < algo->digest_size; i++) {
		char chr[3];

		strncpy(chr, &str[i * 2], 2);
		result[i] = simple_strtoul(chr, NULL, 16);
	}

	return 0;
}

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;
}

#if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
/**
 * 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 {
		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;
			}
		}

		hash_parse_string(algo->name, vsum_str, vsum);
	}
	return 0;
}

static 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_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
#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>
0eb25b61	17	#include <mapmem.h>
1f9c9280	18	#include <hw_sha.h>
2dd90027 RG	19	#include <asm/io.h>
	20	#include <asm/errno.h>
	21	#else
	22	#include "mkimage.h"
	23	#include <time.h>
	24	#include <image.h>
	25	#endif /* !USE_HOSTCC*/
	26
460408ef	27	#include <hash.h>
2dd90027	28	#include <u-boot/crc.h>
2b9912e6 JH	29	#include <u-boot/sha1.h>
2b9912e6 JH	30	#include <u-boot/sha256.h>
2dd90027	31	#include <u-boot/md5.h>
460408ef	32
46fe2c04	33	#ifdef CONFIG_SHA1
bf007ebb HT	34	static int hash_init_sha1(struct hash_algo algo, void *ctxp)
	35	{
	36	sha1_context *ctx = malloc(sizeof(sha1_context));
	37	sha1_starts(ctx);
	38	*ctxp = ctx;
	39	return 0;
	40	}
	41
	42	static int hash_update_sha1(struct hash_algo algo, void ctx, const void *buf,
	43	unsigned int size, int is_last)
	44	{
	45	sha1_update((sha1_context *)ctx, buf, size);
	46	return 0;
	47	}
	48
	49	static int hash_finish_sha1(struct hash_algo algo, void ctx, void *dest_buf,
	50	int size)
	51	{
	52	if (size < algo->digest_size)
	53	return -1;
	54
	55	sha1_finish((sha1_context *)ctx, dest_buf);
	56	free(ctx);
	57	return 0;
	58	}
	59	#endif
	60
	61	#ifdef CONFIG_SHA256
	62	static int hash_init_sha256(struct hash_algo algo, void *ctxp)
	63	{
	64	sha256_context *ctx = malloc(sizeof(sha256_context));
	65	sha256_starts(ctx);
	66	*ctxp = ctx;
	67	return 0;
	68	}
	69
	70	static int hash_update_sha256(struct hash_algo algo, void ctx,
	71	const void *buf, unsigned int size, int is_last)
	72	{
	73	sha256_update((sha256_context *)ctx, buf, size);
	74	return 0;
	75	}
	76
	77	static int hash_finish_sha256(struct hash_algo algo, void ctx, void
	78	*dest_buf, int size)
	79	{
	80	if (size < algo->digest_size)
	81	return -1;
	82
	83	sha256_finish((sha256_context *)ctx, dest_buf);
	84	free(ctx);
	85	return 0;
	86	}
	87	#endif
	88
	89	static int hash_init_crc32(struct hash_algo algo, void *ctxp)
	90	{
	91	uint32_t *ctx = malloc(sizeof(uint32_t));
	92	*ctx = 0;
	93	*ctxp = ctx;
	94	return 0;
	95	}
	96
	97	static int hash_update_crc32(struct hash_algo algo, void ctx,
98	const void *buf, unsigned int size, int is_last)
99	{
100	((uint32_t )ctx) = crc32(((uint32_t )ctx), buf, size);
101	return 0;
102	}
103
104	static int hash_finish_crc32(struct hash_algo algo, void ctx, void *dest_buf,
105	int size)
106	{
107	if (size < algo->digest_size)
108	return -1;
109
110	((uint32_t )dest_buf) = ((uint32_t )ctx);
111	free(ctx);
112	return 0;
113	}
114
460408ef SG	115	/*
460408ef SG	116	* These are the hash algorithms we support. Chips which support accelerated
218da0f3 SG	117	* crypto could perhaps add named version of these algorithms here. Note that
218da0f3 SG	118	* algorithm names must be in lower case.
460408ef SG	119	*/
460408ef SG	120	static struct hash_algo hash_algo[] = {
1f9c9280 AS	121	/*
	122	* CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
	123	* available.
	124	*/
	125	#ifdef CONFIG_SHA_HW_ACCEL
	126	{
	127	"sha1",
	128	SHA1_SUM_LEN,
	129	hw_sha1,
	130	CHUNKSZ_SHA1,
94e3c8c4	131	#ifdef CONFIG_SHA_PROG_HW_ACCEL
	132	hw_sha_init,
	133	hw_sha_update,
	134	hw_sha_finish,
	135	#endif
1f9c9280 AS	136	}, {
	137	"sha256",
	138	SHA256_SUM_LEN,
	139	hw_sha256,
	140	CHUNKSZ_SHA256,
94e3c8c4	141	#ifdef CONFIG_SHA_PROG_HW_ACCEL
	142	hw_sha_init,
	143	hw_sha_update,
	144	hw_sha_finish,
	145	#endif
1f9c9280 AS	146	},
1f9c9280 AS	147	#endif
46fe2c04	148	#ifdef CONFIG_SHA1
460408ef	149	{
218da0f3	150	"sha1",
460408ef SG	151	SHA1_SUM_LEN,
	152	sha1_csum_wd,
	153	CHUNKSZ_SHA1,
bf007ebb HT	154	hash_init_sha1,
	155	hash_update_sha1,
	156	hash_finish_sha1,
460408ef SG	157	},
	158	#endif
	159	#ifdef CONFIG_SHA256
	160	{
218da0f3	161	"sha256",
460408ef SG	162	SHA256_SUM_LEN,
	163	sha256_csum_wd,
	164	CHUNKSZ_SHA256,
bf007ebb HT	165	hash_init_sha256,
	166	hash_update_sha256,
	167	hash_finish_sha256,
460408ef SG	168	},
460408ef SG	169	#endif
d20a40de	170	{
218da0f3	171	"crc32",
d20a40de SG	172	4,
	173	crc32_wd_buf,
	174	CHUNKSZ_CRC32,
bf007ebb HT	175	hash_init_crc32,
	176	hash_update_crc32,
	177	hash_finish_crc32,
d20a40de	178	},
460408ef SG	179	};
460408ef SG	180
46fe2c04 RG	181	#if defined(CONFIG_SHA256) \|\| defined(CONFIG_CMD_SHA1SUM)
	182	#define MULTI_HASH
	183	#endif
	184
d20a40de SG	185	#if defined(CONFIG_HASH_VERIFY) \|\| defined(CONFIG_CMD_HASH)
	186	#define MULTI_HASH
	187	#endif
	188
	189	/* Try to minimize code size for boards that don't want much hashing */
	190	#ifdef MULTI_HASH
	191	#define multi_hash() 1
	192	#else
	193	#define multi_hash() 0
	194	#endif
	195
2dd90027 RG	196	int hash_lookup_algo(const char algo_name, struct hash_algo *algop)
	197	{
	198	int i;
	199
	200	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	201	if (!strcmp(algo_name, hash_algo[i].name)) {
	202	*algop = &hash_algo[i];
	203	return 0;
	204	}
	205	}
	206
	207	debug("Unknown hash algorithm '%s'\n", algo_name);
	208	return -EPROTONOSUPPORT;
	209	}
	210
	211	int hash_progressive_lookup_algo(const char *algo_name,
	212	struct hash_algo **algop)
	213	{
	214	int i;
	215
	216	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	217	if (!strcmp(algo_name, hash_algo[i].name)) {
	218	if (hash_algo[i].hash_init) {
	219	*algop = &hash_algo[i];
	220	return 0;
	221	}
	222	}
	223	}
	224
	225	debug("Unknown hash algorithm '%s'\n", algo_name);
	226	return -EPROTONOSUPPORT;
	227	}
	228
	229	#ifndef USE_HOSTCC
8f0b1e24 SR	230	int hash_parse_string(const char algo_name, const char str, uint8_t *result)
	231	{
	232	struct hash_algo *algo;
	233	int ret;
	234	int i;
	235
	236	ret = hash_lookup_algo(algo_name, &algo);
	237	if (ret)
	238	return ret;
	239
	240	for (i = 0; i < algo->digest_size; i++) {
	241	char chr[3];
	242
	243	strncpy(chr, &str[i * 2], 2);
	244	result[i] = simple_strtoul(chr, NULL, 16);
	245	}
	246
	247	return 0;
	248	}
	249
48ad68de TR	250	int hash_block(const char algo_name, const void data, unsigned int len,
	251	uint8_t output, int output_size)
	252	{
	253	struct hash_algo *algo;
	254	int ret;
	255
	256	ret = hash_lookup_algo(algo_name, &algo);
	257	if (ret)
	258	return ret;
	259
	260	if (output_size && *output_size < algo->digest_size) {
	261	debug("Output buffer size %d too small (need %d bytes)",
	262	*output_size, algo->digest_size);
	263	return -ENOSPC;
	264	}
	265	if (output_size)
	266	*output_size = algo->digest_size;
	267	algo->hash_func_ws(data, len, output, algo->chunk_size);
	268
	269	return 0;
	270	}
	271
	272	#if defined(CONFIG_CMD_HASH) \|\| defined(CONFIG_CMD_SHA1SUM) \|\| defined(CONFIG_CMD_CRC32)
460408ef SG	273	/**
	274	* store_result: Store the resulting sum to an address or variable
	275	*
	276	* @algo: Hash algorithm being used
	277	* @sum: Hash digest (algo->digest_size bytes)
	278	* @dest: Destination, interpreted as a hex address if it starts
d5b76673 SG	279	* with * (or allow_env_vars is 0) or otherwise as an
	280	* environment variable.
	281	* @allow_env_vars: non-zero to permit storing the result to an
	282	* variable environment
460408ef	283	*/
04819a4f	284	static void store_result(struct hash_algo algo, const uint8_t sum,
d5b76673	285	const char *dest, int allow_env_vars)
460408ef SG	286	{
460408ef SG	287	unsigned int i;
d5b76673	288	int env_var = 0;
460408ef	289
d5b76673 SG	290	/*
	291	* If environment variables are allowed, then we assume that 'dest'
	292	* is an environment variable, unless it starts with *, in which
	293	* case we assume it is an address. If not allowed, it is always an
	294	* address. This is to support the crc32 command.
	295	*/
	296	if (allow_env_vars) {
	297	if (dest == '')
	298	dest++;
	299	else
	300	env_var = 1;
	301	}
460408ef	302
d5b76673	303	if (env_var) {
460408ef SG	304	char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
	305	char *str_ptr = str_output;
	306
	307	for (i = 0; i < algo->digest_size; i++) {
	308	sprintf(str_ptr, "%02x", sum[i]);
	309	str_ptr += 2;
	310	}
8b9cc866	311	*str_ptr = '\0';
460408ef	312	setenv(dest, str_output);
d5b76673	313	} else {
bd091b67 SG	314	ulong addr;
bd091b67 SG	315	void *buf;
d5b76673	316
bd091b67 SG	317	addr = simple_strtoul(dest, NULL, 16);
	318	buf = map_sysmem(addr, algo->digest_size);
	319	memcpy(buf, sum, algo->digest_size);
	320	unmap_sysmem(buf);
460408ef SG	321	}
	322	}
	323
	324	/**
	325	* parse_verify_sum: Parse a hash verification parameter
	326	*
	327	* @algo: Hash algorithm being used
	328	* @verify_str: Argument to parse. If it starts with * then it is
	329	* interpreted as a hex address containing the hash.
	330	* If the length is exactly the right number of hex digits
	331	* for the digest size, then we assume it is a hex digest.
	332	* Otherwise we assume it is an environment variable, and
	333	* look up its value (it must contain a hex digest).
	334	* @vsum: Returns binary digest value (algo->digest_size bytes)
d5b76673 SG	335	* @allow_env_vars: non-zero to permit storing the result to an environment
	336	* variable. If 0 then verify_str is assumed to be an
	337	* address, and the * prefix is not expected.
460408ef SG	338	* @return 0 if ok, non-zero on error
460408ef SG	339	*/
04819a4f SG	340	static int parse_verify_sum(struct hash_algo algo, char verify_str,
04819a4f SG	341	uint8_t *vsum, int allow_env_vars)
460408ef	342	{
d5b76673 SG	343	int env_var = 0;
	344
	345	/* See comment above in store_result() */
	346	if (allow_env_vars) {
	347	if (verify_str == '')
	348	verify_str++;
	349	else
	350	env_var = 1;
	351	}
	352
3ef46a99	353	if (!env_var) {
bd091b67 SG	354	ulong addr;
bd091b67 SG	355	void *buf;
460408ef	356
bd091b67 SG	357	addr = simple_strtoul(verify_str, NULL, 16);
	358	buf = map_sysmem(addr, algo->digest_size);
	359	memcpy(vsum, buf, algo->digest_size);
460408ef	360	} else {
460408ef SG	361	char *vsum_str;
	362	int digits = algo->digest_size * 2;
	363
	364	/*
	365	* As with the original code from sha1sum.c, we assume that a
	366	* string which matches the digest size exactly is a hex
	367	* string and not an environment variable.
	368	*/
	369	if (strlen(verify_str) == digits)
	370	vsum_str = verify_str;
	371	else {
	372	vsum_str = getenv(verify_str);
	373	if (vsum_str == NULL \|\| strlen(vsum_str) != digits) {
	374	printf("Expected %d hex digits in env var\n",
	375	digits);
	376	return 1;
	377	}
	378	}
	379
8f0b1e24	380	hash_parse_string(algo->name, vsum_str, vsum);
460408ef SG	381	}
	382	return 0;
	383	}
	384
48ad68de	385	static void hash_show(struct hash_algo algo, ulong addr, ulong len, uint8_t output)
460408ef SG	386	{
	387	int i;
	388
	389	printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
	390	for (i = 0; i < algo->digest_size; i++)
	391	printf("%02x", output[i]);
	392	}
	393
d5b76673	394	int hash_command(const char algo_name, int flags, cmd_tbl_t cmdtp, int flag,
460408ef SG	395	int argc, char * const argv[])
460408ef SG	396	{
460408ef	397	ulong addr, len;
460408ef	398
3ef46a99	399	if ((argc < 2) \|\| ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
460408ef SG	400	return CMD_RET_USAGE;
460408ef SG	401
d5b76673 SG	402	addr = simple_strtoul(*argv++, NULL, 16);
	403	len = simple_strtoul(*argv++, NULL, 16);
	404
d20a40de SG	405	if (multi_hash()) {
d20a40de SG	406	struct hash_algo *algo;
04819a4f SG	407	uint8_t output[HASH_MAX_DIGEST_SIZE];
04819a4f SG	408	uint8_t vsum[HASH_MAX_DIGEST_SIZE];
bd091b67	409	void *buf;
460408ef	410
bf007ebb	411	if (hash_lookup_algo(algo_name, &algo)) {
d20a40de SG	412	printf("Unknown hash algorithm '%s'\n", algo_name);
	413	return CMD_RET_USAGE;
	414	}
	415	argc -= 2;
	416
	417	if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
	418	puts("HASH_MAX_DIGEST_SIZE exceeded\n");
	419	return 1;
	420	}
460408ef	421
bd091b67 SG	422	buf = map_sysmem(addr, len);
	423	algo->hash_func_ws(buf, len, output, algo->chunk_size);
	424	unmap_sysmem(buf);
460408ef	425
d20a40de	426	/* Try to avoid code bloat when verify is not needed */
460408ef	427	#ifdef CONFIG_HASH_VERIFY
d20a40de	428	if (flags & HASH_FLAG_VERIFY) {
460408ef	429	#else
d20a40de	430	if (0) {
460408ef	431	#endif
d20a40de	432	if (parse_verify_sum(algo, *argv, vsum,
d5b76673	433	flags & HASH_FLAG_ENV)) {
d20a40de SG	434	printf("ERROR: %s does not contain a valid "
	435	"%s sum\n", *argv, algo->name);
	436	return 1;
	437	}
	438	if (memcmp(output, vsum, algo->digest_size) != 0) {
	439	int i;
460408ef	440
31890ae2	441	hash_show(algo, addr, len, output);
d20a40de SG	442	printf(" != ");
	443	for (i = 0; i < algo->digest_size; i++)
	444	printf("%02x", vsum[i]);
	445	puts(" ERROR \n");
	446	return 1;
	447	}
	448	} else {
31890ae2	449	hash_show(algo, addr, len, output);
d20a40de SG	450	printf("\n");
	451
	452	if (argc) {
	453	store_result(algo, output, *argv,
	454	flags & HASH_FLAG_ENV);
	455	}
460408ef	456	}
d20a40de SG	457
d20a40de SG	458	/* Horrible code size hack for boards that just want crc32 */
460408ef	459	} else {
d20a40de SG	460	ulong crc;
	461	ulong *ptr;
	462
	463	crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
	464
	465	printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
	466	addr, addr + len - 1, crc);
460408ef	467
4b756b01 TR	468	if (argc >= 3) {
4b756b01 TR	469	ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
d20a40de	470	*ptr = crc;
d5b76673	471	}
460408ef SG	472	}
	473
	474	return 0;
	475	}
2dd90027	476	#endif
48ad68de	477	#endif