[J-u-boot.git] / common / hash.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2012 The Chromium OS Authors.
 *
 * (C) Copyright 2011
 * Joe Hershberger, National Instruments, [email protected]
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <mapmem.h>
#include <hw_sha.h>
#include <asm/io.h>
#include <linux/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>

#if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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

#if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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_crc16_ccitt(struct hash_algo *algo, void **ctxp)
{
	uint16_t *ctx = malloc(sizeof(uint16_t));
	*ctx = 0;
	*ctxp = ctx;
	return 0;
}

static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx,
				   const void *buf, unsigned int size,
				   int is_last)
{
	*((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size);
	return 0;
}

static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
				   void *dest_buf, int size)
{
	if (size < algo->digest_size)
		return -1;

	*((uint16_t *)dest_buf) = *((uint16_t *)ctx);
	free(ctx);
	return 0;
}

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.  If we have hardware acceleration
 * is enable we will use that, otherwise a software version of the algorithm.
 * Note that algorithm names must be in lower case.
 */
static struct hash_algo hash_algo[] = {
#ifdef CONFIG_SHA1
	{
		.name 		= "sha1",
		.digest_size	= SHA1_SUM_LEN,
		.chunk_size	= CHUNKSZ_SHA1,
#ifdef CONFIG_SHA_HW_ACCEL
		.hash_func_ws	= hw_sha1,
#else
		.hash_func_ws	= sha1_csum_wd,
#endif
#ifdef CONFIG_SHA_PROG_HW_ACCEL
		.hash_init	= hw_sha_init,
		.hash_update	= hw_sha_update,
		.hash_finish	= hw_sha_finish,
#else
		.hash_init	= hash_init_sha1,
		.hash_update	= hash_update_sha1,
		.hash_finish	= hash_finish_sha1,
#endif
	},
#endif
#ifdef CONFIG_SHA256
	{
		.name		= "sha256",
		.digest_size	= SHA256_SUM_LEN,
		.chunk_size	= CHUNKSZ_SHA256,
#ifdef CONFIG_SHA_HW_ACCEL
		.hash_func_ws	= hw_sha256,
#else
		.hash_func_ws	= sha256_csum_wd,
#endif
#ifdef CONFIG_SHA_PROG_HW_ACCEL
		.hash_init	= hw_sha_init,
		.hash_update	= hw_sha_update,
		.hash_finish	= hw_sha_finish,
#else
		.hash_init	= hash_init_sha256,
		.hash_update	= hash_update_sha256,
		.hash_finish	= hash_finish_sha256,
#endif
	},
#endif
	{
		.name		= "crc16-ccitt",
		.digest_size	= 2,
		.chunk_size	= CHUNKSZ,
		.hash_func_ws	= crc16_ccitt_wd_buf,
		.hash_init	= hash_init_crc16_ccitt,
		.hash_update	= hash_update_crc16_ccitt,
		.hash_finish	= hash_finish_crc16_ccitt,
	},
	{
		.name		= "crc32",
		.digest_size	= 4,
		.chunk_size	= CHUNKSZ_CRC32,
		.hash_func_ws	= crc32_wd_buf,
		.hash_init	= hash_init_crc32,
		.hash_update	= hash_update_crc32,
		.hash_finish	= hash_finish_crc32,
	},
};

/* Try to minimize code size for boards that don't want much hashing */
#if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM) || \
	defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_CMD_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';
		env_set(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 = env_get(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;
		u8 *output;
		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;
		}

		output = memalign(ARCH_DMA_MINALIGN,
				  sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);

		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 */
#if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
	defined(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);
			}
		unmap_sysmem(output);

		}

	/* 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 /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
#endif /* !USE_HOSTCC */
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
460408ef SG	2	/*
	3	* Copyright (c) 2012 The Chromium OS Authors.
	4	*
	5	* (C) Copyright 2011
	6	* Joe Hershberger, National Instruments, [email protected]
	7	*
	8	* (C) Copyright 2000
	9	* Wolfgang Denk, DENX Software Engineering, [email protected].
460408ef SG	10	*/
460408ef SG	11
2dd90027	12	#ifndef USE_HOSTCC
460408ef SG	13	#include <common.h>
460408ef SG	14	#include <command.h>
bf007ebb	15	#include <malloc.h>
0eb25b61	16	#include <mapmem.h>
1f9c9280	17	#include <hw_sha.h>
2dd90027	18	#include <asm/io.h>
1221ce45	19	#include <linux/errno.h>
2dd90027 RG	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
78eda89e	32	#if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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
78eda89e	60	#if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
bf007ebb HT	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
51c2345b PT	88	static int hash_init_crc16_ccitt(struct hash_algo algo, void *ctxp)
	89	{
	90	uint16_t *ctx = malloc(sizeof(uint16_t));
	91	*ctx = 0;
	92	*ctxp = ctx;
	93	return 0;
	94	}
	95
	96	static int hash_update_crc16_ccitt(struct hash_algo algo, void ctx,
	97	const void *buf, unsigned int size,
	98	int is_last)
	99	{
	100	((uint16_t )ctx) = crc16_ccitt(((uint16_t )ctx), buf, size);
	101	return 0;
	102	}
	103
	104	static int hash_finish_crc16_ccitt(struct hash_algo algo, void ctx,
	105	void *dest_buf, int size)
	106	{
	107	if (size < algo->digest_size)
	108	return -1;
	109
	110	((uint16_t )dest_buf) = ((uint16_t )ctx);
	111	free(ctx);
	112	return 0;
	113	}
	114
bf007ebb HT	115	static int hash_init_crc32(struct hash_algo algo, void *ctxp)
	116	{
	117	uint32_t *ctx = malloc(sizeof(uint32_t));
	118	*ctx = 0;
	119	*ctxp = ctx;
	120	return 0;
	121	}
	122
	123	static int hash_update_crc32(struct hash_algo algo, void ctx,
	124	const void *buf, unsigned int size, int is_last)
	125	{
	126	((uint32_t )ctx) = crc32(((uint32_t )ctx), buf, size);
	127	return 0;
	128	}
	129
	130	static int hash_finish_crc32(struct hash_algo algo, void ctx, void *dest_buf,
	131	int size)
	132	{
	133	if (size < algo->digest_size)
	134	return -1;
	135
	136	((uint32_t )dest_buf) = ((uint32_t )ctx);
	137	free(ctx);
	138	return 0;
	139	}
	140
460408ef	141	/*
78eda89e TR	142	* These are the hash algorithms we support. If we have hardware acceleration
	143	* is enable we will use that, otherwise a software version of the algorithm.
	144	* Note that algorithm names must be in lower case.
460408ef SG	145	*/
460408ef SG	146	static struct hash_algo hash_algo[] = {
78eda89e	147	#ifdef CONFIG_SHA1
1f9c9280	148	{
78eda89e TR	149	.name = "sha1",
	150	.digest_size = SHA1_SUM_LEN,
	151	.chunk_size = CHUNKSZ_SHA1,
	152	#ifdef CONFIG_SHA_HW_ACCEL
	153	.hash_func_ws = hw_sha1,
	154	#else
	155	.hash_func_ws = sha1_csum_wd,
94e3c8c4	156	#endif
94e3c8c4	157	#ifdef CONFIG_SHA_PROG_HW_ACCEL
78eda89e TR	158	.hash_init = hw_sha_init,
	159	.hash_update = hw_sha_update,
	160	.hash_finish = hw_sha_finish,
	161	#else
	162	.hash_init = hash_init_sha1,
	163	.hash_update = hash_update_sha1,
	164	.hash_finish = hash_finish_sha1,
1f9c9280	165	#endif
460408ef SG	166	},
	167	#endif
	168	#ifdef CONFIG_SHA256
	169	{
78eda89e TR	170	.name = "sha256",
	171	.digest_size = SHA256_SUM_LEN,
	172	.chunk_size = CHUNKSZ_SHA256,
	173	#ifdef CONFIG_SHA_HW_ACCEL
	174	.hash_func_ws = hw_sha256,
	175	#else
	176	.hash_func_ws = sha256_csum_wd,
	177	#endif
	178	#ifdef CONFIG_SHA_PROG_HW_ACCEL
	179	.hash_init = hw_sha_init,
	180	.hash_update = hw_sha_update,
	181	.hash_finish = hw_sha_finish,
	182	#else
	183	.hash_init = hash_init_sha256,
	184	.hash_update = hash_update_sha256,
	185	.hash_finish = hash_finish_sha256,
	186	#endif
460408ef SG	187	},
460408ef SG	188	#endif
51c2345b PT	189	{
	190	.name = "crc16-ccitt",
	191	.digest_size = 2,
	192	.chunk_size = CHUNKSZ,
	193	.hash_func_ws = crc16_ccitt_wd_buf,
	194	.hash_init = hash_init_crc16_ccitt,
	195	.hash_update = hash_update_crc16_ccitt,
	196	.hash_finish = hash_finish_crc16_ccitt,
	197	},
d20a40de	198	{
78eda89e TR	199	.name = "crc32",
	200	.digest_size = 4,
	201	.chunk_size = CHUNKSZ_CRC32,
	202	.hash_func_ws = crc32_wd_buf,
	203	.hash_init = hash_init_crc32,
	204	.hash_update = hash_update_crc32,
	205	.hash_finish = hash_finish_crc32,
d20a40de	206	},
460408ef SG	207	};
460408ef SG	208
d20a40de	209	/* Try to minimize code size for boards that don't want much hashing */
221a949e DT	210	#if defined(CONFIG_SHA256) \|\| defined(CONFIG_CMD_SHA1SUM) \|\| \
221a949e DT	211	defined(CONFIG_CRC32_VERIFY) \|\| defined(CONFIG_CMD_HASH)
d20a40de SG	212	#define multi_hash() 1
	213	#else
	214	#define multi_hash() 0
	215	#endif
	216
2dd90027 RG	217	int hash_lookup_algo(const char algo_name, struct hash_algo *algop)
	218	{
	219	int i;
	220
	221	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	222	if (!strcmp(algo_name, hash_algo[i].name)) {
	223	*algop = &hash_algo[i];
	224	return 0;
	225	}
	226	}
	227
	228	debug("Unknown hash algorithm '%s'\n", algo_name);
	229	return -EPROTONOSUPPORT;
	230	}
	231
	232	int hash_progressive_lookup_algo(const char *algo_name,
	233	struct hash_algo **algop)
	234	{
	235	int i;
	236
	237	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	238	if (!strcmp(algo_name, hash_algo[i].name)) {
	239	if (hash_algo[i].hash_init) {
	240	*algop = &hash_algo[i];
	241	return 0;
	242	}
	243	}
	244	}
	245
	246	debug("Unknown hash algorithm '%s'\n", algo_name);
	247	return -EPROTONOSUPPORT;
	248	}
	249
	250	#ifndef USE_HOSTCC
8f0b1e24 SR	251	int hash_parse_string(const char algo_name, const char str, uint8_t *result)
	252	{
	253	struct hash_algo *algo;
	254	int ret;
	255	int i;
	256
	257	ret = hash_lookup_algo(algo_name, &algo);
	258	if (ret)
	259	return ret;
	260
	261	for (i = 0; i < algo->digest_size; i++) {
	262	char chr[3];
	263
	264	strncpy(chr, &str[i * 2], 2);
	265	result[i] = simple_strtoul(chr, NULL, 16);
	266	}
	267
	268	return 0;
	269	}
	270
48ad68de TR	271	int hash_block(const char algo_name, const void data, unsigned int len,
	272	uint8_t output, int output_size)
	273	{
	274	struct hash_algo *algo;
	275	int ret;
	276
	277	ret = hash_lookup_algo(algo_name, &algo);
	278	if (ret)
	279	return ret;
	280
	281	if (output_size && *output_size < algo->digest_size) {
	282	debug("Output buffer size %d too small (need %d bytes)",
	283	*output_size, algo->digest_size);
	284	return -ENOSPC;
	285	}
	286	if (output_size)
	287	*output_size = algo->digest_size;
	288	algo->hash_func_ws(data, len, output, algo->chunk_size);
	289
	290	return 0;
	291	}
	292
	293	#if defined(CONFIG_CMD_HASH) \|\| defined(CONFIG_CMD_SHA1SUM) \|\| defined(CONFIG_CMD_CRC32)
460408ef SG	294	/**
	295	* store_result: Store the resulting sum to an address or variable
	296	*
	297	* @algo: Hash algorithm being used
	298	* @sum: Hash digest (algo->digest_size bytes)
	299	* @dest: Destination, interpreted as a hex address if it starts
d5b76673 SG	300	* with * (or allow_env_vars is 0) or otherwise as an
	301	* environment variable.
	302	* @allow_env_vars: non-zero to permit storing the result to an
	303	* variable environment
460408ef	304	*/
04819a4f	305	static void store_result(struct hash_algo algo, const uint8_t sum,
d5b76673	306	const char *dest, int allow_env_vars)
460408ef SG	307	{
460408ef SG	308	unsigned int i;
d5b76673	309	int env_var = 0;
460408ef	310
d5b76673 SG	311	/*
	312	* If environment variables are allowed, then we assume that 'dest'
	313	* is an environment variable, unless it starts with *, in which
	314	* case we assume it is an address. If not allowed, it is always an
	315	* address. This is to support the crc32 command.
	316	*/
	317	if (allow_env_vars) {
	318	if (dest == '')
	319	dest++;
	320	else
	321	env_var = 1;
	322	}
460408ef	323
d5b76673	324	if (env_var) {
460408ef SG	325	char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
	326	char *str_ptr = str_output;
	327
	328	for (i = 0; i < algo->digest_size; i++) {
	329	sprintf(str_ptr, "%02x", sum[i]);
	330	str_ptr += 2;
	331	}
8b9cc866	332	*str_ptr = '\0';
382bee57	333	env_set(dest, str_output);
d5b76673	334	} else {
bd091b67 SG	335	ulong addr;
bd091b67 SG	336	void *buf;
d5b76673	337
bd091b67 SG	338	addr = simple_strtoul(dest, NULL, 16);
	339	buf = map_sysmem(addr, algo->digest_size);
	340	memcpy(buf, sum, algo->digest_size);
	341	unmap_sysmem(buf);
460408ef SG	342	}
	343	}
	344
	345	/**
	346	* parse_verify_sum: Parse a hash verification parameter
	347	*
	348	* @algo: Hash algorithm being used
	349	* @verify_str: Argument to parse. If it starts with * then it is
	350	* interpreted as a hex address containing the hash.
	351	* If the length is exactly the right number of hex digits
	352	* for the digest size, then we assume it is a hex digest.
	353	* Otherwise we assume it is an environment variable, and
	354	* look up its value (it must contain a hex digest).
	355	* @vsum: Returns binary digest value (algo->digest_size bytes)
d5b76673 SG	356	* @allow_env_vars: non-zero to permit storing the result to an environment
	357	* variable. If 0 then verify_str is assumed to be an
	358	* address, and the * prefix is not expected.
460408ef SG	359	* @return 0 if ok, non-zero on error
460408ef SG	360	*/
04819a4f SG	361	static int parse_verify_sum(struct hash_algo algo, char verify_str,
04819a4f SG	362	uint8_t *vsum, int allow_env_vars)
460408ef	363	{
d5b76673 SG	364	int env_var = 0;
	365
	366	/* See comment above in store_result() */
	367	if (allow_env_vars) {
	368	if (verify_str == '')
	369	verify_str++;
	370	else
	371	env_var = 1;
	372	}
	373
3ef46a99	374	if (!env_var) {
bd091b67 SG	375	ulong addr;
bd091b67 SG	376	void *buf;
460408ef	377
bd091b67 SG	378	addr = simple_strtoul(verify_str, NULL, 16);
	379	buf = map_sysmem(addr, algo->digest_size);
	380	memcpy(vsum, buf, algo->digest_size);
460408ef	381	} else {
460408ef SG	382	char *vsum_str;
	383	int digits = algo->digest_size * 2;
	384
	385	/*
	386	* As with the original code from sha1sum.c, we assume that a
	387	* string which matches the digest size exactly is a hex
	388	* string and not an environment variable.
	389	*/
	390	if (strlen(verify_str) == digits)
	391	vsum_str = verify_str;
	392	else {
00caae6d	393	vsum_str = env_get(verify_str);
460408ef SG	394	if (vsum_str == NULL \|\| strlen(vsum_str) != digits) {
	395	printf("Expected %d hex digits in env var\n",
	396	digits);
	397	return 1;
	398	}
	399	}
	400
8f0b1e24	401	hash_parse_string(algo->name, vsum_str, vsum);
460408ef SG	402	}
	403	return 0;
	404	}
	405
48ad68de	406	static void hash_show(struct hash_algo algo, ulong addr, ulong len, uint8_t output)
460408ef SG	407	{
	408	int i;
	409
	410	printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
	411	for (i = 0; i < algo->digest_size; i++)
	412	printf("%02x", output[i]);
	413	}
	414
d5b76673	415	int hash_command(const char algo_name, int flags, cmd_tbl_t cmdtp, int flag,
460408ef SG	416	int argc, char * const argv[])
460408ef SG	417	{
460408ef	418	ulong addr, len;
460408ef	419
3ef46a99	420	if ((argc < 2) \|\| ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
460408ef SG	421	return CMD_RET_USAGE;
460408ef SG	422
d5b76673 SG	423	addr = simple_strtoul(*argv++, NULL, 16);
	424	len = simple_strtoul(*argv++, NULL, 16);
	425
d20a40de SG	426	if (multi_hash()) {
d20a40de SG	427	struct hash_algo *algo;
d7af2baa	428	u8 *output;
04819a4f	429	uint8_t vsum[HASH_MAX_DIGEST_SIZE];
bd091b67	430	void *buf;
460408ef	431
bf007ebb	432	if (hash_lookup_algo(algo_name, &algo)) {
d20a40de SG	433	printf("Unknown hash algorithm '%s'\n", algo_name);
	434	return CMD_RET_USAGE;
	435	}
	436	argc -= 2;
	437
	438	if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
	439	puts("HASH_MAX_DIGEST_SIZE exceeded\n");
	440	return 1;
	441	}
460408ef	442
d7af2baa BL	443	output = memalign(ARCH_DMA_MINALIGN,
	444	sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
	445
bd091b67 SG	446	buf = map_sysmem(addr, len);
	447	algo->hash_func_ws(buf, len, output, algo->chunk_size);
	448	unmap_sysmem(buf);
460408ef	449
d20a40de	450	/* Try to avoid code bloat when verify is not needed */
221a949e DT	451	#if defined(CONFIG_CRC32_VERIFY) \|\| defined(CONFIG_SHA1SUM_VERIFY) \|\| \
221a949e DT	452	defined(CONFIG_HASH_VERIFY)
d20a40de	453	if (flags & HASH_FLAG_VERIFY) {
460408ef	454	#else
d20a40de	455	if (0) {
460408ef	456	#endif
d20a40de	457	if (parse_verify_sum(algo, *argv, vsum,
d5b76673	458	flags & HASH_FLAG_ENV)) {
d20a40de SG	459	printf("ERROR: %s does not contain a valid "
	460	"%s sum\n", *argv, algo->name);
	461	return 1;
	462	}
	463	if (memcmp(output, vsum, algo->digest_size) != 0) {
	464	int i;
460408ef	465
31890ae2	466	hash_show(algo, addr, len, output);
d20a40de SG	467	printf(" != ");
	468	for (i = 0; i < algo->digest_size; i++)
	469	printf("%02x", vsum[i]);
	470	puts(" ERROR \n");
	471	return 1;
	472	}
	473	} else {
31890ae2	474	hash_show(algo, addr, len, output);
d20a40de SG	475	printf("\n");
	476
	477	if (argc) {
	478	store_result(algo, output, *argv,
	479	flags & HASH_FLAG_ENV);
	480	}
d7af2baa BL	481	unmap_sysmem(output);
d7af2baa BL	482
460408ef	483	}
d20a40de SG	484
d20a40de SG	485	/* Horrible code size hack for boards that just want crc32 */
460408ef	486	} else {
d20a40de SG	487	ulong crc;
	488	ulong *ptr;
	489
	490	crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
	491
	492	printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
	493	addr, addr + len - 1, crc);
460408ef	494
4b756b01 TR	495	if (argc >= 3) {
4b756b01 TR	496	ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
d20a40de	497	*ptr = crc;
d5b76673	498	}
460408ef SG	499	}
	500
	501	return 0;
	502	}
d70f919e SG	503	#endif /* CONFIG_CMD_HASH \|\| CONFIG_CMD_SHA1SUM \|\| CONFIG_CMD_CRC32) */
d70f919e SG	504	#endif /* !USE_HOSTCC */