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);
251 * store_result: Store the resulting sum to an address or variable
253 * @algo: Hash algorithm being used
254 * @sum: Hash digest (algo->digest_size bytes)
255 * @dest: Destination, interpreted as a hex address if it starts
256 * with * (or allow_env_vars is 0) or otherwise as an
257 * environment variable.
258 * @allow_env_vars: non-zero to permit storing the result to an
259 * variable environment
261 static void store_result(struct hash_algo *algo, const uint8_t *sum,
262 const char *dest, int allow_env_vars)
268 * If environment variables are allowed, then we assume that 'dest'
269 * is an environment variable, unless it starts with *, in which
270 * case we assume it is an address. If not allowed, it is always an
271 * address. This is to support the crc32 command.
273 if (allow_env_vars) {
281 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
282 char *str_ptr = str_output;
284 for (i = 0; i < algo->digest_size; i++) {
285 sprintf(str_ptr, "%02x", sum[i]);
289 setenv(dest, str_output);
294 addr = simple_strtoul(dest, NULL, 16);
295 buf = map_sysmem(addr, algo->digest_size);
296 memcpy(buf, sum, algo->digest_size);
302 * parse_verify_sum: Parse a hash verification parameter
304 * @algo: Hash algorithm being used
305 * @verify_str: Argument to parse. If it starts with * then it is
306 * interpreted as a hex address containing the hash.
307 * If the length is exactly the right number of hex digits
308 * for the digest size, then we assume it is a hex digest.
309 * Otherwise we assume it is an environment variable, and
310 * look up its value (it must contain a hex digest).
311 * @vsum: Returns binary digest value (algo->digest_size bytes)
312 * @allow_env_vars: non-zero to permit storing the result to an environment
313 * variable. If 0 then verify_str is assumed to be an
314 * address, and the * prefix is not expected.
315 * @return 0 if ok, non-zero on error
317 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
318 uint8_t *vsum, int allow_env_vars)
322 /* See comment above in store_result() */
323 if (allow_env_vars) {
324 if (*verify_str == '*')
334 addr = simple_strtoul(verify_str, NULL, 16);
335 buf = map_sysmem(addr, algo->digest_size);
336 memcpy(vsum, buf, algo->digest_size);
339 int digits = algo->digest_size * 2;
342 * As with the original code from sha1sum.c, we assume that a
343 * string which matches the digest size exactly is a hex
344 * string and not an environment variable.
346 if (strlen(verify_str) == digits)
347 vsum_str = verify_str;
349 vsum_str = getenv(verify_str);
350 if (vsum_str == NULL || strlen(vsum_str) != digits) {
351 printf("Expected %d hex digits in env var\n",
357 hash_parse_string(algo->name, vsum_str, vsum);
362 void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
366 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
367 for (i = 0; i < algo->digest_size; i++)
368 printf("%02x", output[i]);
371 int hash_block(const char *algo_name, const void *data, unsigned int len,
372 uint8_t *output, int *output_size)
374 struct hash_algo *algo;
377 ret = hash_lookup_algo(algo_name, &algo);
381 if (output_size && *output_size < algo->digest_size) {
382 debug("Output buffer size %d too small (need %d bytes)",
383 *output_size, algo->digest_size);
387 *output_size = algo->digest_size;
388 algo->hash_func_ws(data, len, output, algo->chunk_size);
393 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
394 int argc, char * const argv[])
398 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
399 return CMD_RET_USAGE;
401 addr = simple_strtoul(*argv++, NULL, 16);
402 len = simple_strtoul(*argv++, NULL, 16);
405 struct hash_algo *algo;
406 uint8_t output[HASH_MAX_DIGEST_SIZE];
407 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
410 if (hash_lookup_algo(algo_name, &algo)) {
411 printf("Unknown hash algorithm '%s'\n", algo_name);
412 return CMD_RET_USAGE;
416 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
417 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
421 buf = map_sysmem(addr, len);
422 algo->hash_func_ws(buf, len, output, algo->chunk_size);
425 /* Try to avoid code bloat when verify is not needed */
426 #ifdef CONFIG_HASH_VERIFY
427 if (flags & HASH_FLAG_VERIFY) {
431 if (parse_verify_sum(algo, *argv, vsum,
432 flags & HASH_FLAG_ENV)) {
433 printf("ERROR: %s does not contain a valid "
434 "%s sum\n", *argv, algo->name);
437 if (memcmp(output, vsum, algo->digest_size) != 0) {
440 hash_show(algo, addr, len, output);
442 for (i = 0; i < algo->digest_size; i++)
443 printf("%02x", vsum[i]);
444 puts(" ** ERROR **\n");
448 hash_show(algo, addr, len, output);
452 store_result(algo, output, *argv,
453 flags & HASH_FLAG_ENV);
457 /* Horrible code size hack for boards that just want crc32 */
462 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
464 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
465 addr, addr + len - 1, crc);
468 ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);