2012-12-05 07:46:36 -07:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2012 The Chromium OS Authors.
|
|
|
|
*
|
|
|
|
* (C) Copyright 2011
|
|
|
|
* Joe Hershberger, National Instruments, joe.hershberger@ni.com
|
|
|
|
*
|
|
|
|
* (C) Copyright 2000
|
|
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License as
|
|
|
|
* published by the Free Software Foundation; either version 2 of
|
|
|
|
* the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
|
|
* MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <common.h>
|
|
|
|
#include <command.h>
|
|
|
|
#include <hash.h>
|
|
|
|
#include <sha1.h>
|
|
|
|
#include <sha256.h>
|
2013-02-24 10:33:31 -07:00
|
|
|
#include <asm/io.h>
|
2012-12-05 07:46:36 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* These are the hash algorithms we support. Chips which support accelerated
|
2013-02-24 10:33:32 -07:00
|
|
|
* crypto could perhaps add named version of these algorithms here. Note that
|
|
|
|
* algorithm names must be in lower case.
|
2012-12-05 07:46:36 -07:00
|
|
|
*/
|
|
|
|
static struct hash_algo hash_algo[] = {
|
2013-02-24 13:30:22 -07:00
|
|
|
/*
|
|
|
|
* This is CONFIG_CMD_SHA1SUM instead of CONFIG_SHA1 since otherwise
|
|
|
|
* it bloats the code for boards which use SHA1 but not the 'hash'
|
|
|
|
* or 'sha1sum' commands.
|
|
|
|
*/
|
|
|
|
#ifdef CONFIG_CMD_SHA1SUM
|
2012-12-05 07:46:36 -07:00
|
|
|
{
|
2013-02-24 10:33:32 -07:00
|
|
|
"sha1",
|
2012-12-05 07:46:36 -07:00
|
|
|
SHA1_SUM_LEN,
|
|
|
|
sha1_csum_wd,
|
|
|
|
CHUNKSZ_SHA1,
|
|
|
|
},
|
2013-02-24 13:30:22 -07:00
|
|
|
#define MULTI_HASH
|
2012-12-05 07:46:36 -07:00
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SHA256
|
|
|
|
{
|
2013-02-24 10:33:32 -07:00
|
|
|
"sha256",
|
2012-12-05 07:46:36 -07:00
|
|
|
SHA256_SUM_LEN,
|
|
|
|
sha256_csum_wd,
|
|
|
|
CHUNKSZ_SHA256,
|
|
|
|
},
|
2013-02-24 13:30:22 -07:00
|
|
|
#define MULTI_HASH
|
2012-12-05 07:46:36 -07:00
|
|
|
#endif
|
2013-02-24 13:30:22 -07:00
|
|
|
{
|
2013-02-24 10:33:32 -07:00
|
|
|
"crc32",
|
2013-02-24 13:30:22 -07:00
|
|
|
4,
|
|
|
|
crc32_wd_buf,
|
|
|
|
CHUNKSZ_CRC32,
|
|
|
|
},
|
2012-12-05 07:46:36 -07:00
|
|
|
};
|
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
#if defined(CONFIG_HASH_VERIFY) || defined(CONFIG_CMD_HASH)
|
|
|
|
#define MULTI_HASH
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Try to minimize code size for boards that don't want much hashing */
|
|
|
|
#ifdef MULTI_HASH
|
|
|
|
#define multi_hash() 1
|
|
|
|
#else
|
|
|
|
#define multi_hash() 0
|
|
|
|
#endif
|
|
|
|
|
2012-12-05 07:46:36 -07:00
|
|
|
/**
|
|
|
|
* store_result: Store the resulting sum to an address or variable
|
|
|
|
*
|
|
|
|
* @algo: Hash algorithm being used
|
|
|
|
* @sum: Hash digest (algo->digest_size bytes)
|
|
|
|
* @dest: Destination, interpreted as a hex address if it starts
|
2013-02-24 10:33:26 -07:00
|
|
|
* with * (or allow_env_vars is 0) or otherwise as an
|
|
|
|
* environment variable.
|
|
|
|
* @allow_env_vars: non-zero to permit storing the result to an
|
|
|
|
* variable environment
|
2012-12-05 07:46:36 -07:00
|
|
|
*/
|
|
|
|
static void store_result(struct hash_algo *algo, const u8 *sum,
|
2013-02-24 10:33:26 -07:00
|
|
|
const char *dest, int allow_env_vars)
|
2012-12-05 07:46:36 -07:00
|
|
|
{
|
|
|
|
unsigned int i;
|
2013-02-24 10:33:26 -07:00
|
|
|
int env_var = 0;
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 10:33:26 -07:00
|
|
|
/*
|
|
|
|
* If environment variables are allowed, then we assume that 'dest'
|
|
|
|
* is an environment variable, unless it starts with *, in which
|
|
|
|
* case we assume it is an address. If not allowed, it is always an
|
|
|
|
* address. This is to support the crc32 command.
|
|
|
|
*/
|
|
|
|
if (allow_env_vars) {
|
|
|
|
if (*dest == '*')
|
|
|
|
dest++;
|
|
|
|
else
|
|
|
|
env_var = 1;
|
|
|
|
}
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 10:33:26 -07:00
|
|
|
if (env_var) {
|
2012-12-05 07:46:36 -07:00
|
|
|
char str_output[HASH_MAX_DIGEST_SIZE * 2 + 1];
|
|
|
|
char *str_ptr = str_output;
|
|
|
|
|
|
|
|
for (i = 0; i < algo->digest_size; i++) {
|
|
|
|
sprintf(str_ptr, "%02x", sum[i]);
|
|
|
|
str_ptr += 2;
|
|
|
|
}
|
|
|
|
str_ptr = '\0';
|
|
|
|
setenv(dest, str_output);
|
2013-02-24 10:33:26 -07:00
|
|
|
} else {
|
2013-02-24 10:33:31 -07:00
|
|
|
ulong addr;
|
|
|
|
void *buf;
|
2013-02-24 10:33:26 -07:00
|
|
|
|
2013-02-24 10:33:31 -07:00
|
|
|
addr = simple_strtoul(dest, NULL, 16);
|
|
|
|
buf = map_sysmem(addr, algo->digest_size);
|
|
|
|
memcpy(buf, sum, algo->digest_size);
|
|
|
|
unmap_sysmem(buf);
|
2012-12-05 07:46:36 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* parse_verify_sum: Parse a hash verification parameter
|
|
|
|
*
|
|
|
|
* @algo: Hash algorithm being used
|
|
|
|
* @verify_str: Argument to parse. If it starts with * then it is
|
|
|
|
* interpreted as a hex address containing the hash.
|
|
|
|
* If the length is exactly the right number of hex digits
|
|
|
|
* for the digest size, then we assume it is a hex digest.
|
|
|
|
* Otherwise we assume it is an environment variable, and
|
|
|
|
* look up its value (it must contain a hex digest).
|
|
|
|
* @vsum: Returns binary digest value (algo->digest_size bytes)
|
2013-02-24 10:33:26 -07:00
|
|
|
* @allow_env_vars: non-zero to permit storing the result to an environment
|
|
|
|
* variable. If 0 then verify_str is assumed to be an
|
|
|
|
* address, and the * prefix is not expected.
|
2012-12-05 07:46:36 -07:00
|
|
|
* @return 0 if ok, non-zero on error
|
|
|
|
*/
|
2013-02-24 10:33:26 -07:00
|
|
|
static int parse_verify_sum(struct hash_algo *algo, char *verify_str, u8 *vsum,
|
|
|
|
int allow_env_vars)
|
2012-12-05 07:46:36 -07:00
|
|
|
{
|
2013-02-24 10:33:26 -07:00
|
|
|
int env_var = 0;
|
|
|
|
|
|
|
|
/* See comment above in store_result() */
|
|
|
|
if (allow_env_vars) {
|
|
|
|
if (*verify_str == '*')
|
|
|
|
verify_str++;
|
|
|
|
else
|
|
|
|
env_var = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (env_var) {
|
2013-02-24 10:33:31 -07:00
|
|
|
ulong addr;
|
|
|
|
void *buf;
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 10:33:31 -07:00
|
|
|
addr = simple_strtoul(verify_str, NULL, 16);
|
|
|
|
buf = map_sysmem(addr, algo->digest_size);
|
|
|
|
memcpy(vsum, buf, algo->digest_size);
|
2012-12-05 07:46:36 -07:00
|
|
|
} else {
|
|
|
|
unsigned int i;
|
|
|
|
char *vsum_str;
|
|
|
|
int digits = algo->digest_size * 2;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* As with the original code from sha1sum.c, we assume that a
|
|
|
|
* string which matches the digest size exactly is a hex
|
|
|
|
* string and not an environment variable.
|
|
|
|
*/
|
|
|
|
if (strlen(verify_str) == digits)
|
|
|
|
vsum_str = verify_str;
|
|
|
|
else {
|
|
|
|
vsum_str = getenv(verify_str);
|
|
|
|
if (vsum_str == NULL || strlen(vsum_str) != digits) {
|
|
|
|
printf("Expected %d hex digits in env var\n",
|
|
|
|
digits);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < algo->digest_size; i++) {
|
|
|
|
char *nullp = vsum_str + (i + 1) * 2;
|
|
|
|
char end = *nullp;
|
|
|
|
|
|
|
|
*nullp = '\0';
|
|
|
|
vsum[i] = simple_strtoul(vsum_str + (i * 2), NULL, 16);
|
|
|
|
*nullp = end;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct hash_algo *find_hash_algo(const char *name)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
|
2013-02-24 10:33:32 -07:00
|
|
|
if (!strcmp(name, hash_algo[i].name))
|
2012-12-05 07:46:36 -07:00
|
|
|
return &hash_algo[i];
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void show_hash(struct hash_algo *algo, ulong addr, ulong len,
|
|
|
|
u8 *output)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
printf("%s for %08lx ... %08lx ==> ", algo->name, addr, addr + len - 1);
|
|
|
|
for (i = 0; i < algo->digest_size; i++)
|
|
|
|
printf("%02x", output[i]);
|
|
|
|
}
|
|
|
|
|
2013-02-24 10:33:26 -07:00
|
|
|
int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
|
2012-12-05 07:46:36 -07:00
|
|
|
int argc, char * const argv[])
|
|
|
|
{
|
|
|
|
ulong addr, len;
|
|
|
|
|
|
|
|
if (argc < 2)
|
|
|
|
return CMD_RET_USAGE;
|
|
|
|
|
2013-02-24 10:33:26 -07:00
|
|
|
addr = simple_strtoul(*argv++, NULL, 16);
|
|
|
|
len = simple_strtoul(*argv++, NULL, 16);
|
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
if (multi_hash()) {
|
|
|
|
struct hash_algo *algo;
|
|
|
|
u8 output[HASH_MAX_DIGEST_SIZE];
|
|
|
|
u8 vsum[HASH_MAX_DIGEST_SIZE];
|
2013-02-24 10:33:31 -07:00
|
|
|
void *buf;
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
algo = find_hash_algo(algo_name);
|
|
|
|
if (!algo) {
|
|
|
|
printf("Unknown hash algorithm '%s'\n", algo_name);
|
|
|
|
return CMD_RET_USAGE;
|
|
|
|
}
|
|
|
|
argc -= 2;
|
|
|
|
|
|
|
|
if (algo->digest_size > HASH_MAX_DIGEST_SIZE) {
|
|
|
|
puts("HASH_MAX_DIGEST_SIZE exceeded\n");
|
|
|
|
return 1;
|
|
|
|
}
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 10:33:31 -07:00
|
|
|
buf = map_sysmem(addr, len);
|
|
|
|
algo->hash_func_ws(buf, len, output, algo->chunk_size);
|
|
|
|
unmap_sysmem(buf);
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
/* Try to avoid code bloat when verify is not needed */
|
2012-12-05 07:46:36 -07:00
|
|
|
#ifdef CONFIG_HASH_VERIFY
|
2013-02-24 13:30:22 -07:00
|
|
|
if (flags & HASH_FLAG_VERIFY) {
|
2012-12-05 07:46:36 -07:00
|
|
|
#else
|
2013-02-24 13:30:22 -07:00
|
|
|
if (0) {
|
2012-12-05 07:46:36 -07:00
|
|
|
#endif
|
2013-02-24 13:30:22 -07:00
|
|
|
if (!argc)
|
|
|
|
return CMD_RET_USAGE;
|
|
|
|
if (parse_verify_sum(algo, *argv, vsum,
|
2013-02-24 10:33:26 -07:00
|
|
|
flags & HASH_FLAG_ENV)) {
|
2013-02-24 13:30:22 -07:00
|
|
|
printf("ERROR: %s does not contain a valid "
|
|
|
|
"%s sum\n", *argv, algo->name);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
if (memcmp(output, vsum, algo->digest_size) != 0) {
|
|
|
|
int i;
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
show_hash(algo, addr, len, output);
|
|
|
|
printf(" != ");
|
|
|
|
for (i = 0; i < algo->digest_size; i++)
|
|
|
|
printf("%02x", vsum[i]);
|
|
|
|
puts(" ** ERROR **\n");
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
} else {
|
2012-12-05 07:46:36 -07:00
|
|
|
show_hash(algo, addr, len, output);
|
2013-02-24 13:30:22 -07:00
|
|
|
printf("\n");
|
|
|
|
|
|
|
|
if (argc) {
|
|
|
|
store_result(algo, output, *argv,
|
|
|
|
flags & HASH_FLAG_ENV);
|
|
|
|
}
|
2012-12-05 07:46:36 -07:00
|
|
|
}
|
2013-02-24 13:30:22 -07:00
|
|
|
|
|
|
|
/* Horrible code size hack for boards that just want crc32 */
|
2012-12-05 07:46:36 -07:00
|
|
|
} else {
|
2013-02-24 13:30:22 -07:00
|
|
|
ulong crc;
|
|
|
|
ulong *ptr;
|
|
|
|
|
|
|
|
crc = crc32_wd(0, (const uchar *)addr, len, CHUNKSZ_CRC32);
|
|
|
|
|
|
|
|
printf("CRC32 for %08lx ... %08lx ==> %08lx\n",
|
|
|
|
addr, addr + len - 1, crc);
|
2012-12-05 07:46:36 -07:00
|
|
|
|
2013-02-24 13:30:22 -07:00
|
|
|
if (argc > 3) {
|
|
|
|
ptr = (ulong *)simple_strtoul(argv[3], NULL, 16);
|
|
|
|
*ptr = crc;
|
2013-02-24 10:33:26 -07:00
|
|
|
}
|
2012-12-05 07:46:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|