1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2012 The Chromium OS Authors.
20 #include <asm/cache.h>
21 #include <asm/global_data.h>
23 #include <linux/errno.h>
26 #include <linux/compiler_attributes.h>
28 #include <linux/kconfig.h>
29 #endif /* !USE_HOSTCC*/
33 #include <u-boot/crc.h>
34 #include <u-boot/sha1.h>
35 #include <u-boot/sha256.h>
36 #include <u-boot/sha512.h>
37 #include <u-boot/md5.h>
39 static int __maybe_unused hash_init_sha1(struct hash_algo *algo, void **ctxp)
41 sha1_context *ctx = malloc(sizeof(sha1_context));
47 static int __maybe_unused hash_update_sha1(struct hash_algo *algo, void *ctx,
48 const void *buf, unsigned int size,
51 sha1_update((sha1_context *)ctx, buf, size);
55 static int __maybe_unused hash_finish_sha1(struct hash_algo *algo, void *ctx,
56 void *dest_buf, int size)
58 if (size < algo->digest_size)
61 sha1_finish((sha1_context *)ctx, dest_buf);
66 static int __maybe_unused hash_init_sha256(struct hash_algo *algo, void **ctxp)
68 sha256_context *ctx = malloc(sizeof(sha256_context));
74 static int __maybe_unused hash_update_sha256(struct hash_algo *algo, void *ctx,
75 const void *buf, uint size,
78 sha256_update((sha256_context *)ctx, buf, size);
82 static int __maybe_unused hash_finish_sha256(struct hash_algo *algo, void *ctx,
83 void *dest_buf, int size)
85 if (size < algo->digest_size)
88 sha256_finish((sha256_context *)ctx, dest_buf);
93 static int __maybe_unused hash_init_sha384(struct hash_algo *algo, void **ctxp)
95 sha512_context *ctx = malloc(sizeof(sha512_context));
101 static int __maybe_unused hash_update_sha384(struct hash_algo *algo, void *ctx,
102 const void *buf, uint size,
105 sha384_update((sha512_context *)ctx, buf, size);
109 static int __maybe_unused hash_finish_sha384(struct hash_algo *algo, void *ctx,
110 void *dest_buf, int size)
112 if (size < algo->digest_size)
115 sha384_finish((sha512_context *)ctx, dest_buf);
120 static int __maybe_unused hash_init_sha512(struct hash_algo *algo, void **ctxp)
122 sha512_context *ctx = malloc(sizeof(sha512_context));
128 static int __maybe_unused hash_update_sha512(struct hash_algo *algo, void *ctx,
129 const void *buf, uint size,
132 sha512_update((sha512_context *)ctx, buf, size);
136 static int __maybe_unused hash_finish_sha512(struct hash_algo *algo, void *ctx,
137 void *dest_buf, int size)
139 if (size < algo->digest_size)
142 sha512_finish((sha512_context *)ctx, dest_buf);
147 static int hash_init_crc16_ccitt(struct hash_algo *algo, void **ctxp)
149 uint16_t *ctx = malloc(sizeof(uint16_t));
155 static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx,
156 const void *buf, unsigned int size,
159 *((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size);
163 static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
164 void *dest_buf, int size)
166 if (size < algo->digest_size)
169 *((uint16_t *)dest_buf) = *((uint16_t *)ctx);
174 static int __maybe_unused hash_init_crc32(struct hash_algo *algo, void **ctxp)
176 uint32_t *ctx = malloc(sizeof(uint32_t));
182 static int __maybe_unused hash_update_crc32(struct hash_algo *algo, void *ctx,
183 const void *buf, unsigned int size,
186 *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
190 static int __maybe_unused hash_finish_crc32(struct hash_algo *algo, void *ctx,
191 void *dest_buf, int size)
193 if (size < algo->digest_size)
196 *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
202 * These are the hash algorithms we support. If we have hardware acceleration
203 * is enable we will use that, otherwise a software version of the algorithm.
204 * Note that algorithm names must be in lower case.
206 static struct hash_algo hash_algo[] = {
207 #if CONFIG_IS_ENABLED(MD5)
210 .digest_size = MD5_SUM_LEN,
211 .chunk_size = CHUNKSZ_MD5,
212 .hash_func_ws = md5_wd,
215 #if CONFIG_IS_ENABLED(SHA1)
218 .digest_size = SHA1_SUM_LEN,
219 .chunk_size = CHUNKSZ_SHA1,
220 #if CONFIG_IS_ENABLED(SHA_HW_ACCEL)
221 .hash_func_ws = hw_sha1,
223 .hash_func_ws = sha1_csum_wd,
225 #if CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
226 .hash_init = hw_sha_init,
227 .hash_update = hw_sha_update,
228 .hash_finish = hw_sha_finish,
230 .hash_init = hash_init_sha1,
231 .hash_update = hash_update_sha1,
232 .hash_finish = hash_finish_sha1,
236 #if CONFIG_IS_ENABLED(SHA256)
239 .digest_size = SHA256_SUM_LEN,
240 .chunk_size = CHUNKSZ_SHA256,
241 #if CONFIG_IS_ENABLED(SHA_HW_ACCEL)
242 .hash_func_ws = hw_sha256,
244 .hash_func_ws = sha256_csum_wd,
246 #if CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
247 .hash_init = hw_sha_init,
248 .hash_update = hw_sha_update,
249 .hash_finish = hw_sha_finish,
251 .hash_init = hash_init_sha256,
252 .hash_update = hash_update_sha256,
253 .hash_finish = hash_finish_sha256,
257 #if CONFIG_IS_ENABLED(SHA384)
260 .digest_size = SHA384_SUM_LEN,
261 .chunk_size = CHUNKSZ_SHA384,
262 #if CONFIG_IS_ENABLED(SHA512_HW_ACCEL)
263 .hash_func_ws = hw_sha384,
265 .hash_func_ws = sha384_csum_wd,
267 #if CONFIG_IS_ENABLED(SHA512_HW_ACCEL) && CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
268 .hash_init = hw_sha_init,
269 .hash_update = hw_sha_update,
270 .hash_finish = hw_sha_finish,
272 .hash_init = hash_init_sha384,
273 .hash_update = hash_update_sha384,
274 .hash_finish = hash_finish_sha384,
278 #if CONFIG_IS_ENABLED(SHA512)
281 .digest_size = SHA512_SUM_LEN,
282 .chunk_size = CHUNKSZ_SHA512,
283 #if CONFIG_IS_ENABLED(SHA512_HW_ACCEL)
284 .hash_func_ws = hw_sha512,
286 .hash_func_ws = sha512_csum_wd,
288 #if CONFIG_IS_ENABLED(SHA512_HW_ACCEL) && CONFIG_IS_ENABLED(SHA_PROG_HW_ACCEL)
289 .hash_init = hw_sha_init,
290 .hash_update = hw_sha_update,
291 .hash_finish = hw_sha_finish,
293 .hash_init = hash_init_sha512,
294 .hash_update = hash_update_sha512,
295 .hash_finish = hash_finish_sha512,
300 .name = "crc16-ccitt",
302 .chunk_size = CHUNKSZ,
303 .hash_func_ws = crc16_ccitt_wd_buf,
304 .hash_init = hash_init_crc16_ccitt,
305 .hash_update = hash_update_crc16_ccitt,
306 .hash_finish = hash_finish_crc16_ccitt,
308 #if CONFIG_IS_ENABLED(CRC32)
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,
321 /* Try to minimize code size for boards that don't want much hashing */
322 #if CONFIG_IS_ENABLED(SHA256) || IS_ENABLED(CONFIG_CMD_SHA1SUM) || \
323 CONFIG_IS_ENABLED(CRC32_VERIFY) || IS_ENABLED(CONFIG_CMD_HASH) || \
324 CONFIG_IS_ENABLED(SHA384) || CONFIG_IS_ENABLED(SHA512)
325 #define multi_hash() 1
327 #define multi_hash() 0
330 int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
334 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
335 if (!strcmp(algo_name, hash_algo[i].name)) {
336 *algop = &hash_algo[i];
341 debug("Unknown hash algorithm '%s'\n", algo_name);
342 return -EPROTONOSUPPORT;
345 int hash_progressive_lookup_algo(const char *algo_name,
346 struct hash_algo **algop)
350 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
351 if (!strcmp(algo_name, hash_algo[i].name)) {
352 if (hash_algo[i].hash_init) {
353 *algop = &hash_algo[i];
359 debug("Unknown hash algorithm '%s'\n", algo_name);
360 return -EPROTONOSUPPORT;
364 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
366 struct hash_algo *algo;
370 ret = hash_lookup_algo(algo_name, &algo);
374 for (i = 0; i < algo->digest_size; i++) {
377 strlcpy(chr, &str[i * 2], 3);
378 result[i] = hextoul(chr, NULL);
384 int hash_block(const char *algo_name, const void *data, unsigned int len,
385 uint8_t *output, int *output_size)
387 struct hash_algo *algo;
390 ret = hash_lookup_algo(algo_name, &algo);
394 if (output_size && *output_size < algo->digest_size) {
395 debug("Output buffer size %d too small (need %d bytes)",
396 *output_size, algo->digest_size);
400 *output_size = algo->digest_size;
401 algo->hash_func_ws(data, len, output, algo->chunk_size);
406 #if !defined(CONFIG_SPL_BUILD) && (defined(CONFIG_CMD_HASH) || \
407 defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32))
409 * store_result: Store the resulting sum to an address or variable
411 * @algo: Hash algorithm being used
412 * @sum: Hash digest (algo->digest_size bytes)
413 * @dest: Destination, interpreted as a hex address if it starts
414 * with * (or allow_env_vars is 0) or otherwise as an
415 * environment variable.
416 * @allow_env_vars: non-zero to permit storing the result to an
417 * variable environment
419 static void store_result(struct hash_algo *algo, const uint8_t *sum,
420 const char *dest, int allow_env_vars)
426 * If environment variables are allowed, then we assume that 'dest'
427 * is an environment variable, unless it starts with *, in which
428 * case we assume it is an address. If not allowed, it is always an
429 * address. This is to support the crc32 command.
431 if (allow_env_vars) {
439 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
440 char *str_ptr = str_output;
442 for (i = 0; i < algo->digest_size; i++) {
443 sprintf(str_ptr, "%02x", sum[i]);
447 env_set(dest, str_output);
452 addr = hextoul(dest, NULL);
453 buf = map_sysmem(addr, algo->digest_size);
454 memcpy(buf, sum, algo->digest_size);
460 * parse_verify_sum: Parse a hash verification parameter
462 * @algo: Hash algorithm being used
463 * @verify_str: Argument to parse. If it starts with * then it is
464 * interpreted as a hex address containing the hash.
465 * If the length is exactly the right number of hex digits
466 * for the digest size, then we assume it is a hex digest.
467 * Otherwise we assume it is an environment variable, and
468 * look up its value (it must contain a hex digest).
469 * @vsum: Returns binary digest value (algo->digest_size bytes)
470 * @allow_env_vars: non-zero to permit storing the result to an environment
471 * variable. If 0 then verify_str is assumed to be an
472 * address, and the * prefix is not expected.
473 * Return: 0 if ok, non-zero on error
475 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
476 uint8_t *vsum, int allow_env_vars)
480 /* See comment above in store_result() */
481 if (allow_env_vars) {
482 if (*verify_str == '*')
492 addr = hextoul(verify_str, NULL);
493 buf = map_sysmem(addr, algo->digest_size);
494 memcpy(vsum, buf, algo->digest_size);
497 int digits = algo->digest_size * 2;
500 * As with the original code from sha1sum.c, we assume that a
501 * string which matches the digest size exactly is a hex
502 * string and not an environment variable.
504 if (strlen(verify_str) == digits)
505 vsum_str = verify_str;
507 vsum_str = env_get(verify_str);
508 if (vsum_str == NULL || strlen(vsum_str) != digits) {
509 printf("Expected %d hex digits in env var\n",
515 hash_parse_string(algo->name, vsum_str, vsum);
520 static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
524 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
525 for (i = 0; i < algo->digest_size; i++)
526 printf("%02x", output[i]);
529 int hash_command(const char *algo_name, int flags, struct cmd_tbl *cmdtp,
530 int flag, int argc, char *const argv[])
534 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
535 return CMD_RET_USAGE;
537 addr = hextoul(*argv++, NULL);
538 len = hextoul(*argv++, NULL);
541 struct hash_algo *algo;
543 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
546 if (hash_lookup_algo(algo_name, &algo)) {
547 printf("Unknown hash algorithm '%s'\n", algo_name);
548 return CMD_RET_USAGE;
552 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
553 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
557 output = memalign(ARCH_DMA_MINALIGN,
558 sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
560 return CMD_RET_FAILURE;
562 buf = map_sysmem(addr, len);
563 algo->hash_func_ws(buf, len, output, algo->chunk_size);
566 /* Try to avoid code bloat when verify is not needed */
567 #if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
568 defined(CONFIG_HASH_VERIFY)
569 if (flags & HASH_FLAG_VERIFY) {
573 if (parse_verify_sum(algo, *argv, vsum,
574 flags & HASH_FLAG_ENV)) {
575 printf("ERROR: %s does not contain a valid "
576 "%s sum\n", *argv, algo->name);
580 if (memcmp(output, vsum, algo->digest_size) != 0) {
583 hash_show(algo, addr, len, output);
585 for (i = 0; i < algo->digest_size; i++)
586 printf("%02x", vsum[i]);
587 puts(" ** ERROR **\n");
592 hash_show(algo, addr, len, output);
596 store_result(algo, output, *argv,
597 flags & HASH_FLAG_ENV);
603 /* Horrible code size hack for boards that just want crc32 */
608 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
610 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
611 addr, addr + len - 1, crc);
614 ptr = (ulong *)hextoul(argv[0], NULL);
621 #endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
622 #endif /* !USE_HOSTCC */