]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/hash.c
2 * Copyright (c) 2012 The Chromium OS Authors.
5 * Joe Hershberger, National Instruments, joe.hershberger@ni.com
8 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
10 * SPDX-License-Identifier: GPL-2.0+
20 #include <asm/errno.h>
25 #endif /* !USE_HOSTCC*/
28 #include <u-boot/crc.h>
29 #include <u-boot/sha1.h>
30 #include <u-boot/sha256.h>
31 #include <u-boot/md5.h>
34 static int hash_init_sha1(struct hash_algo
*algo
, void **ctxp
)
36 sha1_context
*ctx
= malloc(sizeof(sha1_context
));
42 static int hash_update_sha1(struct hash_algo
*algo
, void *ctx
, const void *buf
,
43 unsigned int size
, int is_last
)
45 sha1_update((sha1_context
*)ctx
, buf
, size
);
49 static int hash_finish_sha1(struct hash_algo
*algo
, void *ctx
, void *dest_buf
,
52 if (size
< algo
->digest_size
)
55 sha1_finish((sha1_context
*)ctx
, dest_buf
);
62 static int hash_init_sha256(struct hash_algo
*algo
, void **ctxp
)
64 sha256_context
*ctx
= malloc(sizeof(sha256_context
));
70 static int hash_update_sha256(struct hash_algo
*algo
, void *ctx
,
71 const void *buf
, unsigned int size
, int is_last
)
73 sha256_update((sha256_context
*)ctx
, buf
, size
);
77 static int hash_finish_sha256(struct hash_algo
*algo
, void *ctx
, void
80 if (size
< algo
->digest_size
)
83 sha256_finish((sha256_context
*)ctx
, dest_buf
);
89 static int hash_init_crc32(struct hash_algo
*algo
, void **ctxp
)
91 uint32_t *ctx
= malloc(sizeof(uint32_t));
97 static int hash_update_crc32(struct hash_algo
*algo
, void *ctx
,
98 const void *buf
, unsigned int size
, int is_last
)
100 *((uint32_t *)ctx
) = crc32(*((uint32_t *)ctx
), buf
, size
);
104 static int hash_finish_crc32(struct hash_algo
*algo
, void *ctx
, void *dest_buf
,
107 if (size
< algo
->digest_size
)
110 *((uint32_t *)dest_buf
) = *((uint32_t *)ctx
);
116 * These are the hash algorithms we support. Chips which support accelerated
117 * crypto could perhaps add named version of these algorithms here. Note that
118 * algorithm names must be in lower case.
120 static struct hash_algo hash_algo
[] = {
122 * CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
125 #ifdef CONFIG_SHA_HW_ACCEL
131 #ifdef CONFIG_SHA_PROG_HW_ACCEL
141 #ifdef CONFIG_SHA_PROG_HW_ACCEL
181 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM)
185 #if defined(CONFIG_HASH_VERIFY) || defined(CONFIG_CMD_HASH)
189 /* Try to minimize code size for boards that don't want much hashing */
191 #define multi_hash() 1
193 #define multi_hash() 0
196 int hash_lookup_algo(const char *algo_name
, struct hash_algo
**algop
)
200 for (i
= 0; i
< ARRAY_SIZE(hash_algo
); i
++) {
201 if (!strcmp(algo_name
, hash_algo
[i
].name
)) {
202 *algop
= &hash_algo
[i
];
207 debug("Unknown hash algorithm '%s'\n", algo_name
);
208 return -EPROTONOSUPPORT
;
211 int hash_progressive_lookup_algo(const char *algo_name
,
212 struct hash_algo
**algop
)
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
];
225 debug("Unknown hash algorithm '%s'\n", algo_name
);
226 return -EPROTONOSUPPORT
;
230 int hash_parse_string(const char *algo_name
, const char *str
, uint8_t *result
)
232 struct hash_algo
*algo
;
236 ret
= hash_lookup_algo(algo_name
, &algo
);
240 for (i
= 0; i
< algo
->digest_size
; i
++) {
243 strncpy(chr
, &str
[i
* 2], 2);
244 result
[i
] = simple_strtoul(chr
, NULL
, 16);
250 int hash_block(const char *algo_name
, const void *data
, unsigned int len
,
251 uint8_t *output
, int *output_size
)
253 struct hash_algo
*algo
;
256 ret
= hash_lookup_algo(algo_name
, &algo
);
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
);
266 *output_size
= algo
->digest_size
;
267 algo
->hash_func_ws(data
, len
, output
, algo
->chunk_size
);
272 #if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
274 * store_result: Store the resulting sum to an address or variable
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
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
284 static void store_result(struct hash_algo
*algo
, const uint8_t *sum
,
285 const char *dest
, int allow_env_vars
)
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.
296 if (allow_env_vars
) {
304 char str_output
[HASH_MAX_DIGEST_SIZE
* 2 + 1];
305 char *str_ptr
= str_output
;
307 for (i
= 0; i
< algo
->digest_size
; i
++) {
308 sprintf(str_ptr
, "%02x", sum
[i
]);
312 setenv(dest
, str_output
);
317 addr
= simple_strtoul(dest
, NULL
, 16);
318 buf
= map_sysmem(addr
, algo
->digest_size
);
319 memcpy(buf
, sum
, algo
->digest_size
);
325 * parse_verify_sum: Parse a hash verification parameter
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)
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.
338 * @return 0 if ok, non-zero on error
340 static int parse_verify_sum(struct hash_algo
*algo
, char *verify_str
,
341 uint8_t *vsum
, int allow_env_vars
)
345 /* See comment above in store_result() */
346 if (allow_env_vars
) {
347 if (*verify_str
== '*')
357 addr
= simple_strtoul(verify_str
, NULL
, 16);
358 buf
= map_sysmem(addr
, algo
->digest_size
);
359 memcpy(vsum
, buf
, algo
->digest_size
);
362 int digits
= algo
->digest_size
* 2;
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.
369 if (strlen(verify_str
) == digits
)
370 vsum_str
= verify_str
;
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",
380 hash_parse_string(algo
->name
, vsum_str
, vsum
);
385 static void hash_show(struct hash_algo
*algo
, ulong addr
, ulong len
, uint8_t *output
)
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
]);
394 int hash_command(const char *algo_name
, int flags
, cmd_tbl_t
*cmdtp
, int flag
,
395 int argc
, char * const argv
[])
399 if ((argc
< 2) || ((flags
& HASH_FLAG_VERIFY
) && (argc
< 3)))
400 return CMD_RET_USAGE
;
402 addr
= simple_strtoul(*argv
++, NULL
, 16);
403 len
= simple_strtoul(*argv
++, NULL
, 16);
406 struct hash_algo
*algo
;
407 uint8_t output
[HASH_MAX_DIGEST_SIZE
];
408 uint8_t vsum
[HASH_MAX_DIGEST_SIZE
];
411 if (hash_lookup_algo(algo_name
, &algo
)) {
412 printf("Unknown hash algorithm '%s'\n", algo_name
);
413 return CMD_RET_USAGE
;
417 if (algo
->digest_size
> HASH_MAX_DIGEST_SIZE
) {
418 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
422 buf
= map_sysmem(addr
, len
);
423 algo
->hash_func_ws(buf
, len
, output
, algo
->chunk_size
);
426 /* Try to avoid code bloat when verify is not needed */
427 #ifdef CONFIG_HASH_VERIFY
428 if (flags
& HASH_FLAG_VERIFY
) {
432 if (parse_verify_sum(algo
, *argv
, vsum
,
433 flags
& HASH_FLAG_ENV
)) {
434 printf("ERROR: %s does not contain a valid "
435 "%s sum\n", *argv
, algo
->name
);
438 if (memcmp(output
, vsum
, algo
->digest_size
) != 0) {
441 hash_show(algo
, addr
, len
, output
);
443 for (i
= 0; i
< algo
->digest_size
; i
++)
444 printf("%02x", vsum
[i
]);
445 puts(" ** ERROR **\n");
449 hash_show(algo
, addr
, len
, output
);
453 store_result(algo
, output
, *argv
,
454 flags
& HASH_FLAG_ENV
);
458 /* Horrible code size hack for boards that just want crc32 */
463 crc
= crc32_wd(0, (const uchar
*)addr
, len
, CHUNKSZ_CRC32
);
465 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
466 addr
, addr
+ len
- 1, crc
);
469 ptr
= (ulong
*)simple_strtoul(argv
[0], NULL
, 16);