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 <linux/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>
33 #if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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);
61 #if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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_crc16_ccitt(struct hash_algo *algo, void **ctxp)
91 uint16_t *ctx = malloc(sizeof(uint16_t));
97 static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx,
98 const void *buf, unsigned int size,
101 *((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size);
105 static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
106 void *dest_buf, int size)
108 if (size < algo->digest_size)
111 *((uint16_t *)dest_buf) = *((uint16_t *)ctx);
116 static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
118 uint32_t *ctx = malloc(sizeof(uint32_t));
124 static int hash_update_crc32(struct hash_algo *algo, void *ctx,
125 const void *buf, unsigned int size, int is_last)
127 *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
131 static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
134 if (size < algo->digest_size)
137 *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
143 * These are the hash algorithms we support. If we have hardware acceleration
144 * is enable we will use that, otherwise a software version of the algorithm.
145 * Note that algorithm names must be in lower case.
147 static struct hash_algo hash_algo[] = {
151 .digest_size = SHA1_SUM_LEN,
152 .chunk_size = CHUNKSZ_SHA1,
153 #ifdef CONFIG_SHA_HW_ACCEL
154 .hash_func_ws = hw_sha1,
156 .hash_func_ws = sha1_csum_wd,
158 #ifdef CONFIG_SHA_PROG_HW_ACCEL
159 .hash_init = hw_sha_init,
160 .hash_update = hw_sha_update,
161 .hash_finish = hw_sha_finish,
163 .hash_init = hash_init_sha1,
164 .hash_update = hash_update_sha1,
165 .hash_finish = hash_finish_sha1,
172 .digest_size = SHA256_SUM_LEN,
173 .chunk_size = CHUNKSZ_SHA256,
174 #ifdef CONFIG_SHA_HW_ACCEL
175 .hash_func_ws = hw_sha256,
177 .hash_func_ws = sha256_csum_wd,
179 #ifdef CONFIG_SHA_PROG_HW_ACCEL
180 .hash_init = hw_sha_init,
181 .hash_update = hw_sha_update,
182 .hash_finish = hw_sha_finish,
184 .hash_init = hash_init_sha256,
185 .hash_update = hash_update_sha256,
186 .hash_finish = hash_finish_sha256,
191 .name = "crc16-ccitt",
193 .chunk_size = CHUNKSZ,
194 .hash_func_ws = crc16_ccitt_wd_buf,
195 .hash_init = hash_init_crc16_ccitt,
196 .hash_update = hash_update_crc16_ccitt,
197 .hash_finish = hash_finish_crc16_ccitt,
202 .chunk_size = CHUNKSZ_CRC32,
203 .hash_func_ws = crc32_wd_buf,
204 .hash_init = hash_init_crc32,
205 .hash_update = hash_update_crc32,
206 .hash_finish = hash_finish_crc32,
210 /* Try to minimize code size for boards that don't want much hashing */
211 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM) || \
212 defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_CMD_HASH)
213 #define multi_hash() 1
215 #define multi_hash() 0
218 int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
222 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
223 if (!strcmp(algo_name, hash_algo[i].name)) {
224 *algop = &hash_algo[i];
229 debug("Unknown hash algorithm '%s'\n", algo_name);
230 return -EPROTONOSUPPORT;
233 int hash_progressive_lookup_algo(const char *algo_name,
234 struct hash_algo **algop)
238 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
239 if (!strcmp(algo_name, hash_algo[i].name)) {
240 if (hash_algo[i].hash_init) {
241 *algop = &hash_algo[i];
247 debug("Unknown hash algorithm '%s'\n", algo_name);
248 return -EPROTONOSUPPORT;
252 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
254 struct hash_algo *algo;
258 ret = hash_lookup_algo(algo_name, &algo);
262 for (i = 0; i < algo->digest_size; i++) {
265 strncpy(chr, &str[i * 2], 2);
266 result[i] = simple_strtoul(chr, NULL, 16);
272 int hash_block(const char *algo_name, const void *data, unsigned int len,
273 uint8_t *output, int *output_size)
275 struct hash_algo *algo;
278 ret = hash_lookup_algo(algo_name, &algo);
282 if (output_size && *output_size < algo->digest_size) {
283 debug("Output buffer size %d too small (need %d bytes)",
284 *output_size, algo->digest_size);
288 *output_size = algo->digest_size;
289 algo->hash_func_ws(data, len, output, algo->chunk_size);
294 #if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
296 * store_result: Store the resulting sum to an address or variable
298 * @algo: Hash algorithm being used
299 * @sum: Hash digest (algo->digest_size bytes)
300 * @dest: Destination, interpreted as a hex address if it starts
301 * with * (or allow_env_vars is 0) or otherwise as an
302 * environment variable.
303 * @allow_env_vars: non-zero to permit storing the result to an
304 * variable environment
306 static void store_result(struct hash_algo *algo, const uint8_t *sum,
307 const char *dest, int allow_env_vars)
313 * If environment variables are allowed, then we assume that 'dest'
314 * is an environment variable, unless it starts with *, in which
315 * case we assume it is an address. If not allowed, it is always an
316 * address. This is to support the crc32 command.
318 if (allow_env_vars) {
326 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
327 char *str_ptr = str_output;
329 for (i = 0; i < algo->digest_size; i++) {
330 sprintf(str_ptr, "%02x", sum[i]);
334 env_set(dest, str_output);
339 addr = simple_strtoul(dest, NULL, 16);
340 buf = map_sysmem(addr, algo->digest_size);
341 memcpy(buf, sum, algo->digest_size);
347 * parse_verify_sum: Parse a hash verification parameter
349 * @algo: Hash algorithm being used
350 * @verify_str: Argument to parse. If it starts with * then it is
351 * interpreted as a hex address containing the hash.
352 * If the length is exactly the right number of hex digits
353 * for the digest size, then we assume it is a hex digest.
354 * Otherwise we assume it is an environment variable, and
355 * look up its value (it must contain a hex digest).
356 * @vsum: Returns binary digest value (algo->digest_size bytes)
357 * @allow_env_vars: non-zero to permit storing the result to an environment
358 * variable. If 0 then verify_str is assumed to be an
359 * address, and the * prefix is not expected.
360 * @return 0 if ok, non-zero on error
362 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
363 uint8_t *vsum, int allow_env_vars)
367 /* See comment above in store_result() */
368 if (allow_env_vars) {
369 if (*verify_str == '*')
379 addr = simple_strtoul(verify_str, NULL, 16);
380 buf = map_sysmem(addr, algo->digest_size);
381 memcpy(vsum, buf, algo->digest_size);
384 int digits = algo->digest_size * 2;
387 * As with the original code from sha1sum.c, we assume that a
388 * string which matches the digest size exactly is a hex
389 * string and not an environment variable.
391 if (strlen(verify_str) == digits)
392 vsum_str = verify_str;
394 vsum_str = env_get(verify_str);
395 if (vsum_str == NULL || strlen(vsum_str) != digits) {
396 printf("Expected %d hex digits in env var\n",
402 hash_parse_string(algo->name, vsum_str, vsum);
407 static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
411 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
412 for (i = 0; i < algo->digest_size; i++)
413 printf("%02x", output[i]);
416 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
417 int argc, char * const argv[])
421 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
422 return CMD_RET_USAGE;
424 addr = simple_strtoul(*argv++, NULL, 16);
425 len = simple_strtoul(*argv++, NULL, 16);
428 struct hash_algo *algo;
430 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
433 if (hash_lookup_algo(algo_name, &algo)) {
434 printf("Unknown hash algorithm '%s'\n", algo_name);
435 return CMD_RET_USAGE;
439 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
440 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
444 output = memalign(ARCH_DMA_MINALIGN,
445 sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
447 buf = map_sysmem(addr, len);
448 algo->hash_func_ws(buf, len, output, algo->chunk_size);
451 /* Try to avoid code bloat when verify is not needed */
452 #if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
453 defined(CONFIG_HASH_VERIFY)
454 if (flags & HASH_FLAG_VERIFY) {
458 if (parse_verify_sum(algo, *argv, vsum,
459 flags & HASH_FLAG_ENV)) {
460 printf("ERROR: %s does not contain a valid "
461 "%s sum\n", *argv, algo->name);
464 if (memcmp(output, vsum, algo->digest_size) != 0) {
467 hash_show(algo, addr, len, output);
469 for (i = 0; i < algo->digest_size; i++)
470 printf("%02x", vsum[i]);
471 puts(" ** ERROR **\n");
475 hash_show(algo, addr, len, output);
479 store_result(algo, output, *argv,
480 flags & HASH_FLAG_ENV);
482 unmap_sysmem(output);
486 /* Horrible code size hack for boards that just want crc32 */
491 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
493 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
494 addr, addr + len - 1, crc);
497 ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
504 #endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
505 #endif /* !USE_HOSTCC */