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.
19 #include <linux/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>
32 #if defined(CONFIG_SHA1) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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);
60 #if defined(CONFIG_SHA256) && !defined(CONFIG_SHA_PROG_HW_ACCEL)
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_crc16_ccitt(struct hash_algo *algo, void **ctxp)
90 uint16_t *ctx = malloc(sizeof(uint16_t));
96 static int hash_update_crc16_ccitt(struct hash_algo *algo, void *ctx,
97 const void *buf, unsigned int size,
100 *((uint16_t *)ctx) = crc16_ccitt(*((uint16_t *)ctx), buf, size);
104 static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
105 void *dest_buf, int size)
107 if (size < algo->digest_size)
110 *((uint16_t *)dest_buf) = *((uint16_t *)ctx);
115 static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
117 uint32_t *ctx = malloc(sizeof(uint32_t));
123 static int hash_update_crc32(struct hash_algo *algo, void *ctx,
124 const void *buf, unsigned int size, int is_last)
126 *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
130 static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
133 if (size < algo->digest_size)
136 *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
142 * These are the hash algorithms we support. If we have hardware acceleration
143 * is enable we will use that, otherwise a software version of the algorithm.
144 * Note that algorithm names must be in lower case.
146 static struct hash_algo hash_algo[] = {
150 .digest_size = SHA1_SUM_LEN,
151 .chunk_size = CHUNKSZ_SHA1,
152 #ifdef CONFIG_SHA_HW_ACCEL
153 .hash_func_ws = hw_sha1,
155 .hash_func_ws = sha1_csum_wd,
157 #ifdef CONFIG_SHA_PROG_HW_ACCEL
158 .hash_init = hw_sha_init,
159 .hash_update = hw_sha_update,
160 .hash_finish = hw_sha_finish,
162 .hash_init = hash_init_sha1,
163 .hash_update = hash_update_sha1,
164 .hash_finish = hash_finish_sha1,
171 .digest_size = SHA256_SUM_LEN,
172 .chunk_size = CHUNKSZ_SHA256,
173 #ifdef CONFIG_SHA_HW_ACCEL
174 .hash_func_ws = hw_sha256,
176 .hash_func_ws = sha256_csum_wd,
178 #ifdef CONFIG_SHA_PROG_HW_ACCEL
179 .hash_init = hw_sha_init,
180 .hash_update = hw_sha_update,
181 .hash_finish = hw_sha_finish,
183 .hash_init = hash_init_sha256,
184 .hash_update = hash_update_sha256,
185 .hash_finish = hash_finish_sha256,
190 .name = "crc16-ccitt",
192 .chunk_size = CHUNKSZ,
193 .hash_func_ws = crc16_ccitt_wd_buf,
194 .hash_init = hash_init_crc16_ccitt,
195 .hash_update = hash_update_crc16_ccitt,
196 .hash_finish = hash_finish_crc16_ccitt,
201 .chunk_size = CHUNKSZ_CRC32,
202 .hash_func_ws = crc32_wd_buf,
203 .hash_init = hash_init_crc32,
204 .hash_update = hash_update_crc32,
205 .hash_finish = hash_finish_crc32,
209 /* Try to minimize code size for boards that don't want much hashing */
210 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM) || \
211 defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_CMD_HASH)
212 #define multi_hash() 1
214 #define multi_hash() 0
217 int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
221 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
222 if (!strcmp(algo_name, hash_algo[i].name)) {
223 *algop = &hash_algo[i];
228 debug("Unknown hash algorithm '%s'\n", algo_name);
229 return -EPROTONOSUPPORT;
232 int hash_progressive_lookup_algo(const char *algo_name,
233 struct hash_algo **algop)
237 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
238 if (!strcmp(algo_name, hash_algo[i].name)) {
239 if (hash_algo[i].hash_init) {
240 *algop = &hash_algo[i];
246 debug("Unknown hash algorithm '%s'\n", algo_name);
247 return -EPROTONOSUPPORT;
251 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
253 struct hash_algo *algo;
257 ret = hash_lookup_algo(algo_name, &algo);
261 for (i = 0; i < algo->digest_size; i++) {
264 strncpy(chr, &str[i * 2], 2);
265 result[i] = simple_strtoul(chr, NULL, 16);
271 int hash_block(const char *algo_name, const void *data, unsigned int len,
272 uint8_t *output, int *output_size)
274 struct hash_algo *algo;
277 ret = hash_lookup_algo(algo_name, &algo);
281 if (output_size && *output_size < algo->digest_size) {
282 debug("Output buffer size %d too small (need %d bytes)",
283 *output_size, algo->digest_size);
287 *output_size = algo->digest_size;
288 algo->hash_func_ws(data, len, output, algo->chunk_size);
293 #if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
295 * store_result: Store the resulting sum to an address or variable
297 * @algo: Hash algorithm being used
298 * @sum: Hash digest (algo->digest_size bytes)
299 * @dest: Destination, interpreted as a hex address if it starts
300 * with * (or allow_env_vars is 0) or otherwise as an
301 * environment variable.
302 * @allow_env_vars: non-zero to permit storing the result to an
303 * variable environment
305 static void store_result(struct hash_algo *algo, const uint8_t *sum,
306 const char *dest, int allow_env_vars)
312 * If environment variables are allowed, then we assume that 'dest'
313 * is an environment variable, unless it starts with *, in which
314 * case we assume it is an address. If not allowed, it is always an
315 * address. This is to support the crc32 command.
317 if (allow_env_vars) {
325 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
326 char *str_ptr = str_output;
328 for (i = 0; i < algo->digest_size; i++) {
329 sprintf(str_ptr, "%02x", sum[i]);
333 env_set(dest, str_output);
338 addr = simple_strtoul(dest, NULL, 16);
339 buf = map_sysmem(addr, algo->digest_size);
340 memcpy(buf, sum, algo->digest_size);
346 * parse_verify_sum: Parse a hash verification parameter
348 * @algo: Hash algorithm being used
349 * @verify_str: Argument to parse. If it starts with * then it is
350 * interpreted as a hex address containing the hash.
351 * If the length is exactly the right number of hex digits
352 * for the digest size, then we assume it is a hex digest.
353 * Otherwise we assume it is an environment variable, and
354 * look up its value (it must contain a hex digest).
355 * @vsum: Returns binary digest value (algo->digest_size bytes)
356 * @allow_env_vars: non-zero to permit storing the result to an environment
357 * variable. If 0 then verify_str is assumed to be an
358 * address, and the * prefix is not expected.
359 * @return 0 if ok, non-zero on error
361 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
362 uint8_t *vsum, int allow_env_vars)
366 /* See comment above in store_result() */
367 if (allow_env_vars) {
368 if (*verify_str == '*')
378 addr = simple_strtoul(verify_str, NULL, 16);
379 buf = map_sysmem(addr, algo->digest_size);
380 memcpy(vsum, buf, algo->digest_size);
383 int digits = algo->digest_size * 2;
386 * As with the original code from sha1sum.c, we assume that a
387 * string which matches the digest size exactly is a hex
388 * string and not an environment variable.
390 if (strlen(verify_str) == digits)
391 vsum_str = verify_str;
393 vsum_str = env_get(verify_str);
394 if (vsum_str == NULL || strlen(vsum_str) != digits) {
395 printf("Expected %d hex digits in env var\n",
401 hash_parse_string(algo->name, vsum_str, vsum);
406 static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
410 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
411 for (i = 0; i < algo->digest_size; i++)
412 printf("%02x", output[i]);
415 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
416 int argc, char * const argv[])
420 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
421 return CMD_RET_USAGE;
423 addr = simple_strtoul(*argv++, NULL, 16);
424 len = simple_strtoul(*argv++, NULL, 16);
427 struct hash_algo *algo;
429 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
432 if (hash_lookup_algo(algo_name, &algo)) {
433 printf("Unknown hash algorithm '%s'\n", algo_name);
434 return CMD_RET_USAGE;
438 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
439 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
443 output = memalign(ARCH_DMA_MINALIGN,
444 sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
446 buf = map_sysmem(addr, len);
447 algo->hash_func_ws(buf, len, output, algo->chunk_size);
450 /* Try to avoid code bloat when verify is not needed */
451 #if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
452 defined(CONFIG_HASH_VERIFY)
453 if (flags & HASH_FLAG_VERIFY) {
457 if (parse_verify_sum(algo, *argv, vsum,
458 flags & HASH_FLAG_ENV)) {
459 printf("ERROR: %s does not contain a valid "
460 "%s sum\n", *argv, algo->name);
463 if (memcmp(output, vsum, algo->digest_size) != 0) {
466 hash_show(algo, addr, len, output);
468 for (i = 0; i < algo->digest_size; i++)
469 printf("%02x", vsum[i]);
470 puts(" ** ERROR **\n");
474 hash_show(algo, addr, len, output);
478 store_result(algo, output, *argv,
479 flags & HASH_FLAG_ENV);
481 unmap_sysmem(output);
485 /* Horrible code size hack for boards that just want crc32 */
490 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
492 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
493 addr, addr + len - 1, crc);
496 ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
503 #endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
504 #endif /* !USE_HOSTCC */