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git.ipfire.org Git - people/ms/u-boot.git/blob - common/hash.c
d154d029e9c32466979bdc93116b70778402bb78
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+
19 #include <asm/errno.h>
24 #endif /* !USE_HOSTCC*/
27 #include <u-boot/crc.h>
28 #include <u-boot/sha1.h>
29 #include <u-boot/sha256.h>
30 #include <u-boot/md5.h>
33 static int hash_init_sha1(struct hash_algo
*algo
, void **ctxp
)
35 sha1_context
*ctx
= malloc(sizeof(sha1_context
));
41 static int hash_update_sha1(struct hash_algo
*algo
, void *ctx
, const void *buf
,
42 unsigned int size
, int is_last
)
44 sha1_update((sha1_context
*)ctx
, buf
, size
);
48 static int hash_finish_sha1(struct hash_algo
*algo
, void *ctx
, void *dest_buf
,
51 if (size
< algo
->digest_size
)
54 sha1_finish((sha1_context
*)ctx
, dest_buf
);
61 static int hash_init_sha256(struct hash_algo
*algo
, void **ctxp
)
63 sha256_context
*ctx
= malloc(sizeof(sha256_context
));
69 static int hash_update_sha256(struct hash_algo
*algo
, void *ctx
,
70 const void *buf
, unsigned int size
, int is_last
)
72 sha256_update((sha256_context
*)ctx
, buf
, size
);
76 static int hash_finish_sha256(struct hash_algo
*algo
, void *ctx
, void
79 if (size
< algo
->digest_size
)
82 sha256_finish((sha256_context
*)ctx
, dest_buf
);
88 static int hash_init_crc32(struct hash_algo
*algo
, void **ctxp
)
90 uint32_t *ctx
= malloc(sizeof(uint32_t));
96 static int hash_update_crc32(struct hash_algo
*algo
, void *ctx
,
97 const void *buf
, unsigned int size
, int is_last
)
99 *((uint32_t *)ctx
) = crc32(*((uint32_t *)ctx
), buf
, size
);
103 static int hash_finish_crc32(struct hash_algo
*algo
, void *ctx
, void *dest_buf
,
106 if (size
< algo
->digest_size
)
109 *((uint32_t *)dest_buf
) = *((uint32_t *)ctx
);
115 * These are the hash algorithms we support. Chips which support accelerated
116 * crypto could perhaps add named version of these algorithms here. Note that
117 * algorithm names must be in lower case.
119 static struct hash_algo hash_algo
[] = {
121 * CONFIG_SHA_HW_ACCEL is defined if hardware acceleration is
124 #ifdef CONFIG_SHA_HW_ACCEL
170 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM)
174 #if defined(CONFIG_HASH_VERIFY) || defined(CONFIG_CMD_HASH)
178 /* Try to minimize code size for boards that don't want much hashing */
180 #define multi_hash() 1
182 #define multi_hash() 0
185 int hash_lookup_algo(const char *algo_name
, struct hash_algo
**algop
)
189 for (i
= 0; i
< ARRAY_SIZE(hash_algo
); i
++) {
190 if (!strcmp(algo_name
, hash_algo
[i
].name
)) {
191 *algop
= &hash_algo
[i
];
196 debug("Unknown hash algorithm '%s'\n", algo_name
);
197 return -EPROTONOSUPPORT
;
200 int hash_progressive_lookup_algo(const char *algo_name
,
201 struct hash_algo
**algop
)
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
];
214 debug("Unknown hash algorithm '%s'\n", algo_name
);
215 return -EPROTONOSUPPORT
;
220 * store_result: Store the resulting sum to an address or variable
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
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
230 static void store_result(struct hash_algo
*algo
, const uint8_t *sum
,
231 const char *dest
, int allow_env_vars
)
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.
242 if (allow_env_vars
) {
250 char str_output
[HASH_MAX_DIGEST_SIZE
* 2 + 1];
251 char *str_ptr
= str_output
;
253 for (i
= 0; i
< algo
->digest_size
; i
++) {
254 sprintf(str_ptr
, "%02x", sum
[i
]);
258 setenv(dest
, str_output
);
263 addr
= simple_strtoul(dest
, NULL
, 16);
264 buf
= map_sysmem(addr
, algo
->digest_size
);
265 memcpy(buf
, sum
, algo
->digest_size
);
271 * parse_verify_sum: Parse a hash verification parameter
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)
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.
284 * @return 0 if ok, non-zero on error
286 static int parse_verify_sum(struct hash_algo
*algo
, char *verify_str
,
287 uint8_t *vsum
, int allow_env_vars
)
291 /* See comment above in store_result() */
292 if (allow_env_vars
) {
293 if (*verify_str
== '*')
303 addr
= simple_strtoul(verify_str
, NULL
, 16);
304 buf
= map_sysmem(addr
, algo
->digest_size
);
305 memcpy(vsum
, buf
, algo
->digest_size
);
309 int digits
= algo
->digest_size
* 2;
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.
316 if (strlen(verify_str
) == digits
)
317 vsum_str
= verify_str
;
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",
327 for (i
= 0; i
< algo
->digest_size
; i
++) {
328 char *nullp
= vsum_str
+ (i
+ 1) * 2;
332 vsum
[i
] = simple_strtoul(vsum_str
+ (i
* 2), NULL
, 16);
339 void hash_show(struct hash_algo
*algo
, ulong addr
, ulong len
, uint8_t *output
)
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
]);
348 int hash_block(const char *algo_name
, const void *data
, unsigned int len
,
349 uint8_t *output
, int *output_size
)
351 struct hash_algo
*algo
;
354 ret
= hash_lookup_algo(algo_name
, &algo
);
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
);
364 *output_size
= algo
->digest_size
;
365 algo
->hash_func_ws(data
, len
, output
, algo
->chunk_size
);
370 int hash_command(const char *algo_name
, int flags
, cmd_tbl_t
*cmdtp
, int flag
,
371 int argc
, char * const argv
[])
375 if ((argc
< 2) || ((flags
& HASH_FLAG_VERIFY
) && (argc
< 3)))
376 return CMD_RET_USAGE
;
378 addr
= simple_strtoul(*argv
++, NULL
, 16);
379 len
= simple_strtoul(*argv
++, NULL
, 16);
382 struct hash_algo
*algo
;
383 uint8_t output
[HASH_MAX_DIGEST_SIZE
];
384 uint8_t vsum
[HASH_MAX_DIGEST_SIZE
];
387 if (hash_lookup_algo(algo_name
, &algo
)) {
388 printf("Unknown hash algorithm '%s'\n", algo_name
);
389 return CMD_RET_USAGE
;
393 if (algo
->digest_size
> HASH_MAX_DIGEST_SIZE
) {
394 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
398 buf
= map_sysmem(addr
, len
);
399 algo
->hash_func_ws(buf
, len
, output
, algo
->chunk_size
);
402 /* Try to avoid code bloat when verify is not needed */
403 #ifdef CONFIG_HASH_VERIFY
404 if (flags
& HASH_FLAG_VERIFY
) {
408 if (parse_verify_sum(algo
, *argv
, vsum
,
409 flags
& HASH_FLAG_ENV
)) {
410 printf("ERROR: %s does not contain a valid "
411 "%s sum\n", *argv
, algo
->name
);
414 if (memcmp(output
, vsum
, algo
->digest_size
) != 0) {
417 hash_show(algo
, addr
, len
, output
);
419 for (i
= 0; i
< algo
->digest_size
; i
++)
420 printf("%02x", vsum
[i
]);
421 puts(" ** ERROR **\n");
425 hash_show(algo
, addr
, len
, output
);
429 store_result(algo
, output
, *argv
,
430 flags
& HASH_FLAG_ENV
);
434 /* Horrible code size hack for boards that just want crc32 */
439 crc
= crc32_wd(0, (const uchar
*)addr
, len
, CHUNKSZ_CRC32
);
441 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
442 addr
, addr
+ len
- 1, crc
);
445 ptr
= (ulong
*)simple_strtoul(argv
[0], NULL
, 16);