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_crc32(struct hash_algo *algo, void **ctxp)
90 uint32_t *ctx = malloc(sizeof(uint32_t));
96 static int hash_update_crc32(struct hash_algo *algo, void *ctx,
97 const void *buf, unsigned int size, int is_last)
99 *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
103 static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
106 if (size < algo->digest_size)
109 *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
115 * These are the hash algorithms we support. If we have hardware acceleration
116 * is enable we will use that, otherwise a software version of the algorithm.
117 * Note that algorithm names must be in lower case.
119 static struct hash_algo hash_algo[] = {
123 .digest_size = SHA1_SUM_LEN,
124 .chunk_size = CHUNKSZ_SHA1,
125 #ifdef CONFIG_SHA_HW_ACCEL
126 .hash_func_ws = hw_sha1,
128 .hash_func_ws = sha1_csum_wd,
130 #ifdef CONFIG_SHA_PROG_HW_ACCEL
131 .hash_init = hw_sha_init,
132 .hash_update = hw_sha_update,
133 .hash_finish = hw_sha_finish,
135 .hash_init = hash_init_sha1,
136 .hash_update = hash_update_sha1,
137 .hash_finish = hash_finish_sha1,
144 .digest_size = SHA256_SUM_LEN,
145 .chunk_size = CHUNKSZ_SHA256,
146 #ifdef CONFIG_SHA_HW_ACCEL
147 .hash_func_ws = hw_sha256,
149 .hash_func_ws = sha256_csum_wd,
151 #ifdef CONFIG_SHA_PROG_HW_ACCEL
152 .hash_init = hw_sha_init,
153 .hash_update = hw_sha_update,
154 .hash_finish = hw_sha_finish,
156 .hash_init = hash_init_sha256,
157 .hash_update = hash_update_sha256,
158 .hash_finish = hash_finish_sha256,
165 .chunk_size = CHUNKSZ_CRC32,
166 .hash_func_ws = crc32_wd_buf,
167 .hash_init = hash_init_crc32,
168 .hash_update = hash_update_crc32,
169 .hash_finish = hash_finish_crc32,
173 /* Try to minimize code size for boards that don't want much hashing */
174 #if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM) || \
175 defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_CMD_HASH)
176 #define multi_hash() 1
178 #define multi_hash() 0
181 int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
185 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
186 if (!strcmp(algo_name, hash_algo[i].name)) {
187 *algop = &hash_algo[i];
192 debug("Unknown hash algorithm '%s'\n", algo_name);
193 return -EPROTONOSUPPORT;
196 int hash_progressive_lookup_algo(const char *algo_name,
197 struct hash_algo **algop)
201 for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
202 if (!strcmp(algo_name, hash_algo[i].name)) {
203 if (hash_algo[i].hash_init) {
204 *algop = &hash_algo[i];
210 debug("Unknown hash algorithm '%s'\n", algo_name);
211 return -EPROTONOSUPPORT;
215 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result)
217 struct hash_algo *algo;
221 ret = hash_lookup_algo(algo_name, &algo);
225 for (i = 0; i < algo->digest_size; i++) {
228 strncpy(chr, &str[i * 2], 2);
229 result[i] = simple_strtoul(chr, NULL, 16);
235 int hash_block(const char *algo_name, const void *data, unsigned int len,
236 uint8_t *output, int *output_size)
238 struct hash_algo *algo;
241 ret = hash_lookup_algo(algo_name, &algo);
245 if (output_size && *output_size < algo->digest_size) {
246 debug("Output buffer size %d too small (need %d bytes)",
247 *output_size, algo->digest_size);
251 *output_size = algo->digest_size;
252 algo->hash_func_ws(data, len, output, algo->chunk_size);
257 #if defined(CONFIG_CMD_HASH) || defined(CONFIG_CMD_SHA1SUM) || defined(CONFIG_CMD_CRC32)
259 * store_result: Store the resulting sum to an address or variable
261 * @algo: Hash algorithm being used
262 * @sum: Hash digest (algo->digest_size bytes)
263 * @dest: Destination, interpreted as a hex address if it starts
264 * with * (or allow_env_vars is 0) or otherwise as an
265 * environment variable.
266 * @allow_env_vars: non-zero to permit storing the result to an
267 * variable environment
269 static void store_result(struct hash_algo *algo, const uint8_t *sum,
270 const char *dest, int allow_env_vars)
276 * If environment variables are allowed, then we assume that 'dest'
277 * is an environment variable, unless it starts with *, in which
278 * case we assume it is an address. If not allowed, it is always an
279 * address. This is to support the crc32 command.
281 if (allow_env_vars) {
289 char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
290 char *str_ptr = str_output;
292 for (i = 0; i < algo->digest_size; i++) {
293 sprintf(str_ptr, "%02x", sum[i]);
297 env_set(dest, str_output);
302 addr = simple_strtoul(dest, NULL, 16);
303 buf = map_sysmem(addr, algo->digest_size);
304 memcpy(buf, sum, algo->digest_size);
310 * parse_verify_sum: Parse a hash verification parameter
312 * @algo: Hash algorithm being used
313 * @verify_str: Argument to parse. If it starts with * then it is
314 * interpreted as a hex address containing the hash.
315 * If the length is exactly the right number of hex digits
316 * for the digest size, then we assume it is a hex digest.
317 * Otherwise we assume it is an environment variable, and
318 * look up its value (it must contain a hex digest).
319 * @vsum: Returns binary digest value (algo->digest_size bytes)
320 * @allow_env_vars: non-zero to permit storing the result to an environment
321 * variable. If 0 then verify_str is assumed to be an
322 * address, and the * prefix is not expected.
323 * @return 0 if ok, non-zero on error
325 static int parse_verify_sum(struct hash_algo *algo, char *verify_str,
326 uint8_t *vsum, int allow_env_vars)
330 /* See comment above in store_result() */
331 if (allow_env_vars) {
332 if (*verify_str == '*')
342 addr = simple_strtoul(verify_str, NULL, 16);
343 buf = map_sysmem(addr, algo->digest_size);
344 memcpy(vsum, buf, algo->digest_size);
347 int digits = algo->digest_size * 2;
350 * As with the original code from sha1sum.c, we assume that a
351 * string which matches the digest size exactly is a hex
352 * string and not an environment variable.
354 if (strlen(verify_str) == digits)
355 vsum_str = verify_str;
357 vsum_str = env_get(verify_str);
358 if (vsum_str == NULL || strlen(vsum_str) != digits) {
359 printf("Expected %d hex digits in env var\n",
365 hash_parse_string(algo->name, vsum_str, vsum);
370 static void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
374 printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
375 for (i = 0; i < algo->digest_size; i++)
376 printf("%02x", output[i]);
379 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
380 int argc, char * const argv[])
384 if ((argc < 2) || ((flags & HASH_FLAG_VERIFY) && (argc < 3)))
385 return CMD_RET_USAGE;
387 addr = simple_strtoul(*argv++, NULL, 16);
388 len = simple_strtoul(*argv++, NULL, 16);
391 struct hash_algo *algo;
393 uint8_t vsum[HASH_MAX_DIGEST_SIZE];
396 if (hash_lookup_algo(algo_name, &algo)) {
397 printf("Unknown hash algorithm '%s'\n", algo_name);
398 return CMD_RET_USAGE;
402 if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
403 puts("HASH_MAX_DIGEST_SIZE exceeded\n");
407 output = memalign(ARCH_DMA_MINALIGN,
408 sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
410 buf = map_sysmem(addr, len);
411 algo->hash_func_ws(buf, len, output, algo->chunk_size);
414 /* Try to avoid code bloat when verify is not needed */
415 #if defined(CONFIG_CRC32_VERIFY) || defined(CONFIG_SHA1SUM_VERIFY) || \
416 defined(CONFIG_HASH_VERIFY)
417 if (flags & HASH_FLAG_VERIFY) {
421 if (parse_verify_sum(algo, *argv, vsum,
422 flags & HASH_FLAG_ENV)) {
423 printf("ERROR: %s does not contain a valid "
424 "%s sum\n", *argv, algo->name);
427 if (memcmp(output, vsum, algo->digest_size) != 0) {
430 hash_show(algo, addr, len, output);
432 for (i = 0; i < algo->digest_size; i++)
433 printf("%02x", vsum[i]);
434 puts(" ** ERROR **\n");
438 hash_show(algo, addr, len, output);
442 store_result(algo, output, *argv,
443 flags & HASH_FLAG_ENV);
445 unmap_sysmem(output);
449 /* Horrible code size hack for boards that just want crc32 */
454 crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
456 printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
457 addr, addr + len - 1, crc);
460 ptr = (ulong *)simple_strtoul(argv[0], NULL, 16);
467 #endif /* CONFIG_CMD_HASH || CONFIG_CMD_SHA1SUM || CONFIG_CMD_CRC32) */
468 #endif /* !USE_HOSTCC */