1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2012 The Chromium OS Authors.
6 * Joe Hershberger, National Instruments, joe.hershberger@ni.com
9 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
20 #include <asm/cache.h>
21 #include <asm/global_data.h>
23 #include <linux/errno.h>
24 #include <u-boot/crc.h>
28 #endif /* !USE_HOSTCC*/
32 #include <u-boot/crc.h>
33 #include <u-boot/sha1.h>
34 #include <u-boot/sha256.h>
35 #include <u-boot/sha512.h>
36 #include <u-boot/md5.h>
38 #if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
39 DECLARE_GLOBAL_DATA_PTR;
42 static void reloc_update(void);
44 #if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
45 static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
47 sha1_context *ctx = malloc(sizeof(sha1_context));
53 static int hash_update_sha1(struct hash_algo *algo, void *ctx, const void *buf,
54 unsigned int size, int is_last)
56 sha1_update((sha1_context *)ctx, buf, size);
60 static int hash_finish_sha1(struct hash_algo *algo, void *ctx, void *dest_buf,
63 if (size < algo->digest_size)
66 sha1_finish((sha1_context *)ctx, dest_buf);
72 #if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
73 static int hash_init_sha256(struct hash_algo *algo, void **ctxp)
75 sha256_context *ctx = malloc(sizeof(sha256_context));
81 static int hash_update_sha256(struct hash_algo *algo, void *ctx,
82 const void *buf, unsigned int size, int is_last)
84 sha256_update((sha256_context *)ctx, buf, size);
88 static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
91 if (size < algo->digest_size)
94 sha256_finish((sha256_context *)ctx, dest_buf);
100 #if defined(CONFIG_SHA384) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
101 static int hash_init_sha384(struct hash_algo *algo, void **ctxp)
103 sha512_context *ctx = malloc(sizeof(sha512_context));
109 static int hash_update_sha384(struct hash_algo *algo, void *ctx,
110 const void *buf, unsigned int size, int is_last)
112 sha384_update((sha512_context *)ctx, buf, size);
116 static int hash_finish_sha384(struct hash_algo *algo, void *ctx, void
119 if (size < algo->digest_size)
122 sha384_finish((sha512_context *)ctx, dest_buf);
128 #if defined(CONFIG_SHA512) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
129 static int hash_init_sha512(struct hash_algo *algo, void **ctxp)
131 sha512_context *ctx = malloc(sizeof(sha512_context));
137 static int hash_update_sha512(struct hash_algo *algo, void *ctx,
138 const void *buf, unsigned int size, int is_last)
140 sha512_update((sha512_context *)ctx, buf, size);
144 static int hash_finish_sha512(struct hash_algo *algo, void *ctx, void
147 if (size < algo->digest_size)
150 sha512_finish((sha512_context *)ctx, dest_buf);
157 static int hash_init_crc16_ccitt(struct hash_algo *algo, void **ctxp)
159 uint16_t *ctx = malloc(sizeof(uint16_t));
165 static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx,
166 const void *buf, unsigned int size,
169 *((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size);
173 static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
174 void *dest_buf, int size)
176 if (size < algo->digest_size)
179 *((uint16_t *)dest_buf) = *((uint16_t *)ctx);
184 static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
186 uint32_t *ctx = malloc(sizeof(uint32_t));
192 static int hash_update_crc32(struct hash_algo *algo, void *ctx,
193 const void *buf, unsigned int size, int is_last)
195 *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
199 static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
202 if (size < algo->digest_size)
205 *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
211 * These are the hash algorithms we support. If we have hardware acceleration
212 * is enable we will use that, otherwise a software version of the algorithm.
213 * Note that algorithm names must be in lower case.
215 static struct hash_algo hash_algo[] = {
219 .digest_size = SHA1_SUM_LEN,
220 .chunk_size = CHUNKSZ_SHA1,
221 #ifdef CONFIG_SHA_HW_ACCEL
222 .hash_func_ws = hw_sha1,
224 .hash_func_ws = sha1_csum_wd,
226 #ifdef CONFIG_SHA_PROG_HW_ACCEL
227 .hash_init = hw_sha_init,
228 .hash_update = hw_sha_update,
229 .hash_finish = hw_sha_finish,
231 .hash_init = hash_init_sha1,
232 .hash_update = hash_update_sha1,
233 .hash_finish = hash_finish_sha1,
240 .digest_size = SHA256_SUM_LEN,
241 .chunk_size = CHUNKSZ_SHA256,
242 #ifdef CONFIG_SHA_HW_ACCEL
243 .hash_func_ws = hw_sha256,
245 .hash_func_ws = sha256_csum_wd,
247 #ifdef CONFIG_SHA_PROG_HW_ACCEL
248 .hash_init = hw_sha_init,
249 .hash_update = hw_sha_update,
250 .hash_finish = hw_sha_finish,
252 .hash_init = hash_init_sha256,
253 .hash_update = hash_update_sha256,
254 .hash_finish = hash_finish_sha256,
261 .digest_size = SHA384_SUM_LEN,
262 .chunk_size = CHUNKSZ_SHA384,
263 #ifdef CONFIG_SHA512_HW_ACCEL
264 .hash_func_ws = hw_sha384,
266 .hash_func_ws = sha384_csum_wd,
268 #if defined(CONFIG_SHA512_HW_ACCEL) && defined(CONFIG_SHA_PROG_HW_ACCEL)
269 .hash_init = hw_sha_init,
270 .hash_update = hw_sha_update,
271 .hash_finish = hw_sha_finish,
273 .hash_init = hash_init_sha384,
274 .hash_update = hash_update_sha384,
275 .hash_finish = hash_finish_sha384,
282 .digest_size = SHA512_SUM_LEN,
283 .chunk_size = CHUNKSZ_SHA512,
284 #ifdef CONFIG_SHA512_HW_ACCEL
285 .hash_func_ws = hw_sha512,
287 .hash_func_ws = sha512_csum_wd,
289 #if defined(CONFIG_SHA512_HW_ACCEL) && defined(CONFIG_SHA_PROG_HW_ACCEL)
290 .hash_init = hw_sha_init,
291 .hash_update = hw_sha_update,
292 .hash_finish = hw_sha_finish,
294 .hash_init = hash_init_sha512,
295 .hash_update = hash_update_sha512,
296 .hash_finish = hash_finish_sha512,
301 .name = "crc16-ccitt",
303 .chunk_size = CHUNKSZ,
304 .hash_func_ws = crc16_ccitt_wd_buf,
305 .hash_init = hash_init_crc16_ccitt,
306 .hash_update = hash_update_crc16_ccitt,
307 .hash_finish = hash_finish_crc16_ccitt,
312 .chunk_size = CHUNKSZ_CRC32,
313 .hash_func_ws = crc32_wd_buf,
314 .hash_init = hash_init_crc32,
315 .hash_update = hash_update_crc32,
316 .hash_finish = hash_finish_crc32,
320 /* Try to minimize code size for boards that don't want much hashing */
321 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM) || \
322 defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_CMD_HASH) || \
323 defined(CONFIG_SHA384) || defined(CONFIG_SHA512)
324 #define multi_hash() 1
326 #define multi_hash() 0
329 static void reloc_update(void)
331 #if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
337 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
338 hash_algo[i].name += gd->reloc_off;
339 hash_algo[i].hash_func_ws += gd->reloc_off;
340 hash_algo[i].hash_init += gd->reloc_off;
341 hash_algo[i].hash_update += gd->reloc_off;
342 hash_algo[i].hash_finish += gd->reloc_off;
348 int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
354 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
355 if (!strcmp(algo_name, hash_algo[i].name)) {
356 *algop = &hash_algo[i];
361 debug("Unknown hash algorithm '%s'\n", algo_name);
362 return -EPROTONOSUPPORT;
365 int hash_progressive_lookup_algo(const char *algo_name,
366 struct hash_algo **algop)
372 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
373 if (!strcmp(algo_name, hash_algo[i].name)) {
374 if (hash_algo[i].hash_init) {
375 *algop = &hash_algo[i];
381 debug("Unknown hash algorithm '%s'\n", algo_name);
382 return -EPROTONOSUPPORT;
386 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
388 struct hash_algo *algo;
392 ret = hash_lookup_algo(algo_name, &algo);
396 for (i = 0; i < algo->digest_size; i++) {
399 strlcpy(chr, &str[i * 2], 3);
400 result[i] = hextoul(chr, NULL);
406 int hash_block(const char *algo_name, const void *data, unsigned int len,
407 uint8_t *output, int *output_size)
409 struct hash_algo *algo;
412 ret = hash_lookup_algo(algo_name, &algo);
416 if (output_size && *output_size < algo->digest_size) {
417 debug("Output buffer size %d too small (need %d bytes)",
418 *output_size, algo->digest_size);
422 *output_size = algo->digest_size;
423 algo->hash_func_ws(data, len, output, algo->chunk_size);
428 #if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
430 * store_result: Store the resulting sum to an address or variable
432 * @algo: Hash algorithm being used
433 * @sum: Hash digest (algo->digest_size bytes)
434 * @dest: Destination, interpreted as a hex address if it starts
435 * with * (or allow_env_vars is 0) or otherwise as an
436 * environment variable.
437 * @allow_env_vars: non-zero to permit storing the result to an
438 * variable environment
440 static void store_result(struct hash_algo *algo, const uint8_t *sum,
441 const char *dest, int allow_env_vars)
447 * If environment variables are allowed, then we assume that 'dest'
448 * is an environment variable, unless it starts with *, in which
449 * case we assume it is an address. If not allowed, it is always an
450 * address. This is to support the crc32 command.
452 if (allow_env_vars) {
460 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
461 char *str_ptr = str_output;
463 for (i = 0; i < algo->digest_size; i++) {
464 sprintf(str_ptr, "%02x", sum[i]);
468 env_set(dest, str_output);
473 addr = hextoul(dest, NULL);
474 buf = map_sysmem(addr, algo->digest_size);
475 memcpy(buf, sum, algo->digest_size);
481 * parse_verify_sum: Parse a hash verification parameter
483 * @algo: Hash algorithm being used
484 * @verify_str: Argument to parse. If it starts with * then it is
485 * interpreted as a hex address containing the hash.
486 * If the length is exactly the right number of hex digits
487 * for the digest size, then we assume it is a hex digest.
488 * Otherwise we assume it is an environment variable, and
489 * look up its value (it must contain a hex digest).
490 * @vsum: Returns binary digest value (algo->digest_size bytes)
491 * @allow_env_vars: non-zero to permit storing the result to an environment
492 * variable. If 0 then verify_str is assumed to be an
493 * address, and the * prefix is not expected.
494 * @return 0 if ok, non-zero on error
496 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
497 uint8_t *vsum, int allow_env_vars)
501 /* See comment above in store_result() */
502 if (allow_env_vars) {
503 if (*verify_str == '*')
513 addr = hextoul(verify_str, NULL);
514 buf = map_sysmem(addr, algo->digest_size);
515 memcpy(vsum, buf, algo->digest_size);
518 int digits = algo->digest_size * 2;
521 * As with the original code from sha1sum.c, we assume that a
522 * string which matches the digest size exactly is a hex
523 * string and not an environment variable.
525 if (strlen(verify_str) == digits)
526 vsum_str = verify_str;
528 vsum_str = env_get(verify_str);
529 if (vsum_str == NULL || strlen(vsum_str) != digits) {
530 printf("Expected %d hex digits in env var\n",
536 hash_parse_string(algo->name, vsum_str, vsum);
541 static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
545 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
546 for (i = 0; i < algo->digest_size; i++)
547 printf("%02x", output[i]);
550 int hash_command(const char *algo_name, int flags, struct cmd_tbl *cmdtp,
551 int flag, int argc, char *const argv[])
555 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
556 return CMD_RET_USAGE;
558 addr = hextoul(*argv++, NULL);
559 len = hextoul(*argv++, NULL);
562 struct hash_algo *algo;
564 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
567 if (hash_lookup_algo(algo_name, &algo)) {
568 printf("Unknown hash algorithm '%s'\n", algo_name);
569 return CMD_RET_USAGE;
573 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
574 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
578 output = memalign(ARCH_DMA_MINALIGN,
579 sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
581 buf = map_sysmem(addr, len);
582 algo->hash_func_ws(buf, len, output, algo->chunk_size);
585 /* Try to avoid code bloat when verify is not needed */
586 #if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
587 defined(CONFIG_HASH_VERIFY)
588 if (flags & HASH_FLAG_VERIFY) {
592 if (parse_verify_sum(algo, *argv, vsum,
593 flags & HASH_FLAG_ENV)) {
594 printf("ERROR: %s does not contain a valid "
595 "%s sum\n", *argv, algo->name);
598 if (memcmp(output, vsum, algo->digest_size) != 0) {
601 hash_show(algo, addr, len, output);
603 for (i = 0; i < algo->digest_size; i++)
604 printf("%02x", vsum[i]);
605 puts(" ** ERROR **\n");
609 hash_show(algo, addr, len, output);
613 store_result(algo, output, *argv,
614 flags & HASH_FLAG_ENV);
616 unmap_sysmem(output);
620 /* Horrible code size hack for boards that just want crc32 */
625 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
627 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
628 addr, addr + len - 1, crc);
631 ptr = (ulong *)hextoul(argv[0], NULL);
638 #endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
639 #endif /* !USE_HOSTCC */