[thirdparty/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, joe.hershberger@ni.com
 *
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */

#ifndef USE_HOSTCC
#include <common.h>
#include <command.h>
#include <env.h>
#include <malloc.h>
#include <mapmem.h>
#include <hw_sha.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <u-boot/crc.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(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
DECLARE_GLOBAL_DATA_PTR;
#endif

static void reloc_update(void);

#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

static void reloc_update(void)
{
#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
	int i;
	static bool done;

	if (!done) {
		done = true;
		for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
			hash_algo[i].name += gd->reloc_off;
			hash_algo[i].hash_func_ws += gd->reloc_off;
			hash_algo[i].hash_init += gd->reloc_off;
			hash_algo[i].hash_update += gd->reloc_off;
			hash_algo[i].hash_finish += gd->reloc_off;
		}
	}
#endif
}

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

	reloc_update();

	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;

	reloc_update();

	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, joe.hershberger@ni.com
	7	*
	8	* (C) Copyright 2000
	9	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
460408ef SG	10	*/
460408ef SG	11
2dd90027	12	#ifndef USE_HOSTCC
460408ef SG	13	#include <common.h>
460408ef SG	14	#include <command.h>
9fb625ce	15	#include <env.h>
bf007ebb	16	#include <malloc.h>
0eb25b61	17	#include <mapmem.h>
1f9c9280	18	#include <hw_sha.h>
90526e9f	19	#include <asm/cache.h>
2dd90027	20	#include <asm/io.h>
1221ce45	21	#include <linux/errno.h>
3db71108	22	#include <u-boot/crc.h>
2dd90027 RG	23	#else
	24	#include "mkimage.h"
	25	#include <time.h>
	26	#include <image.h>
	27	#endif /* !USE_HOSTCC*/
	28
460408ef	29	#include <hash.h>
2dd90027	30	#include <u-boot/crc.h>
2b9912e6 JH	31	#include <u-boot/sha1.h>
2b9912e6 JH	32	#include <u-boot/sha256.h>
2dd90027	33	#include <u-boot/md5.h>
460408ef	34
10088fb0 KR	35	#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
	36	DECLARE_GLOBAL_DATA_PTR;
	37	#endif
	38
	39	static void reloc_update(void);
	40
78eda89e	41	#if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
bf007ebb HT	42	static int hash_init_sha1(struct hash_algo algo, void *ctxp)
	43	{
	44	sha1_context *ctx = malloc(sizeof(sha1_context));
	45	sha1_starts(ctx);
	46	*ctxp = ctx;
	47	return 0;
	48	}
	49
	50	static int hash_update_sha1(struct hash_algo algo, void ctx, const void *buf,
	51	unsigned int size, int is_last)
	52	{
	53	sha1_update((sha1_context *)ctx, buf, size);
	54	return 0;
	55	}
	56
	57	static int hash_finish_sha1(struct hash_algo algo, void ctx, void *dest_buf,
	58	int size)
	59	{
	60	if (size < algo->digest_size)
	61	return -1;
	62
	63	sha1_finish((sha1_context *)ctx, dest_buf);
	64	free(ctx);
	65	return 0;
	66	}
	67	#endif
	68
78eda89e	69	#if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
bf007ebb HT	70	static int hash_init_sha256(struct hash_algo algo, void *ctxp)
	71	{
	72	sha256_context *ctx = malloc(sizeof(sha256_context));
	73	sha256_starts(ctx);
	74	*ctxp = ctx;
	75	return 0;
	76	}
	77
	78	static int hash_update_sha256(struct hash_algo algo, void ctx,
	79	const void *buf, unsigned int size, int is_last)
	80	{
	81	sha256_update((sha256_context *)ctx, buf, size);
	82	return 0;
	83	}
	84
	85	static int hash_finish_sha256(struct hash_algo algo, void ctx, void
	86	*dest_buf, int size)
	87	{
	88	if (size < algo->digest_size)
	89	return -1;
	90
	91	sha256_finish((sha256_context *)ctx, dest_buf);
	92	free(ctx);
	93	return 0;
	94	}
	95	#endif
	96
51c2345b PT	97	static int hash_init_crc16_ccitt(struct hash_algo algo, void *ctxp)
	98	{
	99	uint16_t *ctx = malloc(sizeof(uint16_t));
	100	*ctx = 0;
	101	*ctxp = ctx;
	102	return 0;
	103	}
	104
	105	static int hash_update_crc16_ccitt(struct hash_algo algo, void ctx,
	106	const void *buf, unsigned int size,
	107	int is_last)
	108	{
	109	((uint16_t )ctx) = crc16_ccitt(((uint16_t )ctx), buf, size);
	110	return 0;
	111	}
	112
	113	static int hash_finish_crc16_ccitt(struct hash_algo algo, void ctx,
	114	void *dest_buf, int size)
	115	{
	116	if (size < algo->digest_size)
	117	return -1;
	118
	119	((uint16_t )dest_buf) = ((uint16_t )ctx);
	120	free(ctx);
	121	return 0;
	122	}
	123
bf007ebb HT	124	static int hash_init_crc32(struct hash_algo algo, void *ctxp)
	125	{
	126	uint32_t *ctx = malloc(sizeof(uint32_t));
	127	*ctx = 0;
	128	*ctxp = ctx;
	129	return 0;
	130	}
	131
	132	static int hash_update_crc32(struct hash_algo algo, void ctx,
	133	const void *buf, unsigned int size, int is_last)
	134	{
	135	((uint32_t )ctx) = crc32(((uint32_t )ctx), buf, size);
	136	return 0;
	137	}
	138
	139	static int hash_finish_crc32(struct hash_algo algo, void ctx, void *dest_buf,
	140	int size)
	141	{
	142	if (size < algo->digest_size)
	143	return -1;
	144
	145	((uint32_t )dest_buf) = ((uint32_t )ctx);
	146	free(ctx);
	147	return 0;
	148	}
	149
460408ef	150	/*
78eda89e TR	151	* These are the hash algorithms we support. If we have hardware acceleration
	152	* is enable we will use that, otherwise a software version of the algorithm.
	153	* Note that algorithm names must be in lower case.
460408ef SG	154	*/
460408ef SG	155	static struct hash_algo hash_algo[] = {
78eda89e	156	#ifdef CONFIG_SHA1
1f9c9280	157	{
78eda89e TR	158	.name = "sha1",
	159	.digest_size = SHA1_SUM_LEN,
	160	.chunk_size = CHUNKSZ_SHA1,
	161	#ifdef CONFIG_SHA_HW_ACCEL
	162	.hash_func_ws = hw_sha1,
	163	#else
	164	.hash_func_ws = sha1_csum_wd,
94e3c8c4	165	#endif
94e3c8c4	166	#ifdef CONFIG_SHA_PROG_HW_ACCEL
78eda89e TR	167	.hash_init = hw_sha_init,
	168	.hash_update = hw_sha_update,
	169	.hash_finish = hw_sha_finish,
	170	#else
	171	.hash_init = hash_init_sha1,
	172	.hash_update = hash_update_sha1,
	173	.hash_finish = hash_finish_sha1,
1f9c9280	174	#endif
460408ef SG	175	},
	176	#endif
	177	#ifdef CONFIG_SHA256
	178	{
78eda89e TR	179	.name = "sha256",
	180	.digest_size = SHA256_SUM_LEN,
	181	.chunk_size = CHUNKSZ_SHA256,
	182	#ifdef CONFIG_SHA_HW_ACCEL
	183	.hash_func_ws = hw_sha256,
	184	#else
	185	.hash_func_ws = sha256_csum_wd,
	186	#endif
	187	#ifdef CONFIG_SHA_PROG_HW_ACCEL
	188	.hash_init = hw_sha_init,
	189	.hash_update = hw_sha_update,
	190	.hash_finish = hw_sha_finish,
	191	#else
	192	.hash_init = hash_init_sha256,
	193	.hash_update = hash_update_sha256,
	194	.hash_finish = hash_finish_sha256,
	195	#endif
460408ef SG	196	},
460408ef SG	197	#endif
51c2345b PT	198	{
	199	.name = "crc16-ccitt",
	200	.digest_size = 2,
	201	.chunk_size = CHUNKSZ,
	202	.hash_func_ws = crc16_ccitt_wd_buf,
	203	.hash_init = hash_init_crc16_ccitt,
	204	.hash_update = hash_update_crc16_ccitt,
	205	.hash_finish = hash_finish_crc16_ccitt,
	206	},
d20a40de	207	{
78eda89e TR	208	.name = "crc32",
	209	.digest_size = 4,
	210	.chunk_size = CHUNKSZ_CRC32,
	211	.hash_func_ws = crc32_wd_buf,
	212	.hash_init = hash_init_crc32,
	213	.hash_update = hash_update_crc32,
	214	.hash_finish = hash_finish_crc32,
d20a40de	215	},
460408ef SG	216	};
460408ef SG	217
d20a40de	218	/* Try to minimize code size for boards that don't want much hashing */
221a949e DT	219	#if defined(CONFIG_SHA256) \|\| defined(CONFIG_CMD_SHA1SUM) \|\| \
221a949e DT	220	defined(CONFIG_CRC32_VERIFY) \|\| defined(CONFIG_CMD_HASH)
d20a40de SG	221	#define multi_hash() 1
	222	#else
	223	#define multi_hash() 0
	224	#endif
	225
10088fb0 KR	226	static void reloc_update(void)
	227	{
	228	#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
	229	int i;
	230	static bool done;
	231
	232	if (!done) {
	233	done = true;
	234	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	235	hash_algo[i].name += gd->reloc_off;
	236	hash_algo[i].hash_func_ws += gd->reloc_off;
	237	hash_algo[i].hash_init += gd->reloc_off;
	238	hash_algo[i].hash_update += gd->reloc_off;
	239	hash_algo[i].hash_finish += gd->reloc_off;
	240	}
	241	}
	242	#endif
	243	}
	244
2dd90027 RG	245	int hash_lookup_algo(const char algo_name, struct hash_algo *algop)
	246	{
	247	int i;
	248
10088fb0 KR	249	reloc_update();
10088fb0 KR	250
2dd90027 RG	251	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	252	if (!strcmp(algo_name, hash_algo[i].name)) {
	253	*algop = &hash_algo[i];
	254	return 0;
	255	}
	256	}
	257
	258	debug("Unknown hash algorithm '%s'\n", algo_name);
	259	return -EPROTONOSUPPORT;
	260	}
	261
	262	int hash_progressive_lookup_algo(const char *algo_name,
	263	struct hash_algo **algop)
	264	{
	265	int i;
	266
10088fb0 KR	267	reloc_update();
10088fb0 KR	268
2dd90027 RG	269	for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
	270	if (!strcmp(algo_name, hash_algo[i].name)) {
	271	if (hash_algo[i].hash_init) {
	272	*algop = &hash_algo[i];
	273	return 0;
	274	}
	275	}
	276	}
	277
	278	debug("Unknown hash algorithm '%s'\n", algo_name);
	279	return -EPROTONOSUPPORT;
	280	}
	281
	282	#ifndef USE_HOSTCC
8f0b1e24 SR	283	int hash_parse_string(const char algo_name, const char str, uint8_t *result)
	284	{
	285	struct hash_algo *algo;
	286	int ret;
	287	int i;
	288
	289	ret = hash_lookup_algo(algo_name, &algo);
	290	if (ret)
	291	return ret;
	292
	293	for (i = 0; i < algo->digest_size; i++) {
	294	char chr[3];
	295
	296	strncpy(chr, &str[i * 2], 2);
	297	result[i] = simple_strtoul(chr, NULL, 16);
	298	}
	299
	300	return 0;
	301	}
	302
48ad68de TR	303	int hash_block(const char algo_name, const void data, unsigned int len,
	304	uint8_t output, int output_size)
	305	{
	306	struct hash_algo *algo;
	307	int ret;
	308
	309	ret = hash_lookup_algo(algo_name, &algo);
	310	if (ret)
	311	return ret;
	312
	313	if (output_size && *output_size < algo->digest_size) {
	314	debug("Output buffer size %d too small (need %d bytes)",
	315	*output_size, algo->digest_size);
	316	return -ENOSPC;
	317	}
	318	if (output_size)
	319	*output_size = algo->digest_size;
	320	algo->hash_func_ws(data, len, output, algo->chunk_size);
	321
	322	return 0;
	323	}
	324
	325	#if defined(CONFIG_CMD_HASH) \|\| defined(CONFIG_CMD_SHA1SUM) \|\| defined(CONFIG_CMD_CRC32)
460408ef SG	326	/**
	327	* store_result: Store the resulting sum to an address or variable
	328	*
	329	* @algo: Hash algorithm being used
	330	* @sum: Hash digest (algo->digest_size bytes)
	331	* @dest: Destination, interpreted as a hex address if it starts
d5b76673 SG	332	* with * (or allow_env_vars is 0) or otherwise as an
	333	* environment variable.
	334	* @allow_env_vars: non-zero to permit storing the result to an
	335	* variable environment
460408ef	336	*/
04819a4f	337	static void store_result(struct hash_algo algo, const uint8_t sum,
d5b76673	338	const char *dest, int allow_env_vars)
460408ef SG	339	{
460408ef SG	340	unsigned int i;
d5b76673	341	int env_var = 0;
460408ef	342
d5b76673 SG	343	/*
	344	* If environment variables are allowed, then we assume that 'dest'
	345	* is an environment variable, unless it starts with *, in which
	346	* case we assume it is an address. If not allowed, it is always an
	347	* address. This is to support the crc32 command.
	348	*/
	349	if (allow_env_vars) {
	350	if (dest == '')
	351	dest++;
	352	else
	353	env_var = 1;
	354	}
460408ef	355
d5b76673	356	if (env_var) {
460408ef SG	357	char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
	358	char *str_ptr = str_output;
	359
	360	for (i = 0; i < algo->digest_size; i++) {
	361	sprintf(str_ptr, "%02x", sum[i]);
	362	str_ptr += 2;
	363	}
8b9cc866	364	*str_ptr = '\0';
382bee57	365	env_set(dest, str_output);
d5b76673	366	} else {
bd091b67 SG	367	ulong addr;
bd091b67 SG	368	void *buf;
d5b76673	369
bd091b67 SG	370	addr = simple_strtoul(dest, NULL, 16);
	371	buf = map_sysmem(addr, algo->digest_size);
	372	memcpy(buf, sum, algo->digest_size);
	373	unmap_sysmem(buf);
460408ef SG	374	}
	375	}
	376
	377	/**
	378	* parse_verify_sum: Parse a hash verification parameter
	379	*
	380	* @algo: Hash algorithm being used
	381	* @verify_str: Argument to parse. If it starts with * then it is
	382	* interpreted as a hex address containing the hash.
	383	* If the length is exactly the right number of hex digits
	384	* for the digest size, then we assume it is a hex digest.
	385	* Otherwise we assume it is an environment variable, and
	386	* look up its value (it must contain a hex digest).
	387	* @vsum: Returns binary digest value (algo->digest_size bytes)
d5b76673 SG	388	* @allow_env_vars: non-zero to permit storing the result to an environment
	389	* variable. If 0 then verify_str is assumed to be an
	390	* address, and the * prefix is not expected.
460408ef SG	391	* @return 0 if ok, non-zero on error
460408ef SG	392	*/
04819a4f SG	393	static int parse_verify_sum(struct hash_algo algo, char verify_str,
04819a4f SG	394	uint8_t *vsum, int allow_env_vars)
460408ef	395	{
d5b76673 SG	396	int env_var = 0;
	397
	398	/* See comment above in store_result() */
	399	if (allow_env_vars) {
	400	if (verify_str == '')
	401	verify_str++;
	402	else
	403	env_var = 1;
	404	}
	405
3ef46a99	406	if (!env_var) {
bd091b67 SG	407	ulong addr;
bd091b67 SG	408	void *buf;
460408ef	409
bd091b67 SG	410	addr = simple_strtoul(verify_str, NULL, 16);
	411	buf = map_sysmem(addr, algo->digest_size);
	412	memcpy(vsum, buf, algo->digest_size);
460408ef	413	} else {
460408ef SG	414	char *vsum_str;
	415	int digits = algo->digest_size * 2;
	416
	417	/*
	418	* As with the original code from sha1sum.c, we assume that a
	419	* string which matches the digest size exactly is a hex
	420	* string and not an environment variable.
	421	*/
	422	if (strlen(verify_str) == digits)
	423	vsum_str = verify_str;
	424	else {
00caae6d	425	vsum_str = env_get(verify_str);
460408ef SG	426	if (vsum_str == NULL \|\| strlen(vsum_str) != digits) {
	427	printf("Expected %d hex digits in env var\n",
	428	digits);
	429	return 1;
	430	}
	431	}
	432
8f0b1e24	433	hash_parse_string(algo->name, vsum_str, vsum);
460408ef SG	434	}
	435	return 0;
	436	}
	437
48ad68de	438	static void hash_show(struct hash_algo algo, ulong addr, ulong len, uint8_t output)
460408ef SG	439	{
	440	int i;
	441
	442	printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
	443	for (i = 0; i < algo->digest_size; i++)
	444	printf("%02x", output[i]);
	445	}
	446
d5b76673	447	int hash_command(const char algo_name, int flags, cmd_tbl_t cmdtp, int flag,
460408ef SG	448	int argc, char * const argv[])
460408ef SG	449	{
460408ef	450	ulong addr, len;
460408ef	451
3ef46a99	452	if ((argc < 2) \|\| ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
460408ef SG	453	return CMD_RET_USAGE;
460408ef SG	454
d5b76673 SG	455	addr = simple_strtoul(*argv++, NULL, 16);
	456	len = simple_strtoul(*argv++, NULL, 16);
	457
d20a40de SG	458	if (multi_hash()) {
d20a40de SG	459	struct hash_algo *algo;
d7af2baa	460	u8 *output;
04819a4f	461	uint8_t vsum[HASH_MAX_DIGEST_SIZE];
bd091b67	462	void *buf;
460408ef	463
bf007ebb	464	if (hash_lookup_algo(algo_name, &algo)) {
d20a40de SG	465	printf("Unknown hash algorithm '%s'\n", algo_name);
	466	return CMD_RET_USAGE;
	467	}
	468	argc -= 2;
	469
	470	if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
	471	puts("HASH_MAX_DIGEST_SIZE exceeded\n");
	472	return 1;
	473	}
460408ef	474
d7af2baa BL	475	output = memalign(ARCH_DMA_MINALIGN,
	476	sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
	477
bd091b67 SG	478	buf = map_sysmem(addr, len);
	479	algo->hash_func_ws(buf, len, output, algo->chunk_size);
	480	unmap_sysmem(buf);
460408ef	481
d20a40de	482	/* Try to avoid code bloat when verify is not needed */
221a949e DT	483	#if defined(CONFIG_CRC32_VERIFY) \|\| defined(CONFIG_SHA1SUM_VERIFY) \|\| \
221a949e DT	484	defined(CONFIG_HASH_VERIFY)
d20a40de	485	if (flags & HASH_FLAG_VERIFY) {
460408ef	486	#else
d20a40de	487	if (0) {
460408ef	488	#endif
d20a40de	489	if (parse_verify_sum(algo, *argv, vsum,
d5b76673	490	flags & HASH_FLAG_ENV)) {
d20a40de SG	491	printf("ERROR: %s does not contain a valid "
	492	"%s sum\n", *argv, algo->name);
	493	return 1;
	494	}
	495	if (memcmp(output, vsum, algo->digest_size) != 0) {
	496	int i;
460408ef	497
31890ae2	498	hash_show(algo, addr, len, output);
d20a40de SG	499	printf(" != ");
	500	for (i = 0; i < algo->digest_size; i++)
	501	printf("%02x", vsum[i]);
	502	puts(" ERROR \n");
	503	return 1;
	504	}
	505	} else {
31890ae2	506	hash_show(algo, addr, len, output);
d20a40de SG	507	printf("\n");
	508
	509	if (argc) {
	510	store_result(algo, output, *argv,
	511	flags & HASH_FLAG_ENV);
	512	}
d7af2baa BL	513	unmap_sysmem(output);
d7af2baa BL	514
460408ef	515	}
d20a40de SG	516
d20a40de SG	517	/* Horrible code size hack for boards that just want crc32 */
460408ef	518	} else {
d20a40de SG	519	ulong crc;
	520	ulong *ptr;
	521
	522	crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
	523
	524	printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
	525	addr, addr + len - 1, crc);
460408ef	526
4b756b01 TR	527	if (argc >= 3) {
4b756b01 TR	528	ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
d20a40de	529	*ptr = crc;
d5b76673	530	}
460408ef SG	531	}
	532
	533	return 0;
	534	}
d70f919e SG	535	#endif /* CONFIG_CMD_HASH \|\| CONFIG_CMD_SHA1SUM \|\| CONFIG_CMD_CRC32) */
d70f919e SG	536	#endif /* !USE_HOSTCC */