cmd_md5sum.c
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/*
* (C) Copyright 2011
* Joe Hershberger, National Instruments, joe.hershberger@ni.com
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <u-boot/md5.h>
#include <asm/io.h>
/*
* Store the resulting sum to an address or variable
*/
static void store_result(const u8 *sum, const char *dest)
{
unsigned int i;
if (*dest == '*') {
u8 *ptr;
ptr = (u8 *)simple_strtoul(dest + 1, NULL, 16);
for (i = 0; i < 16; i++)
*ptr++ = sum[i];
} else {
char str_output[33];
char *str_ptr = str_output;
for (i = 0; i < 16; i++) {
sprintf(str_ptr, "%02x", sum[i]);
str_ptr += 2;
}
setenv(dest, str_output);
}
}
#ifdef CONFIG_MD5SUM_VERIFY
static int parse_verify_sum(char *verify_str, u8 *vsum)
{
if (*verify_str == '*') {
u8 *ptr;
ptr = (u8 *)simple_strtoul(verify_str + 1, NULL, 16);
memcpy(vsum, ptr, 16);
} else {
unsigned int i;
char *vsum_str;
if (strlen(verify_str) == 32)
vsum_str = verify_str;
else {
vsum_str = getenv(verify_str);
if (vsum_str == NULL || strlen(vsum_str) != 32)
return 1;
}
for (i = 0; i < 16; i++) {
char *nullp = vsum_str + (i + 1) * 2;
char end = *nullp;
*nullp = '\0';
*(u8 *)(vsum + i) =
simple_strtoul(vsum_str + (i * 2), NULL, 16);
*nullp = end;
}
}
return 0;
}
int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
ulong addr, len;
unsigned int i;
u8 output[16];
u8 vsum[16];
int verify = 0;
int ac;
char * const *av;
void *buf;
if (argc < 3)
return CMD_RET_USAGE;
av = argv + 1;
ac = argc - 1;
if (strcmp(*av, "-v") == 0) {
verify = 1;
av++;
ac--;
if (ac < 3)
return CMD_RET_USAGE;
}
addr = simple_strtoul(*av++, NULL, 16);
len = simple_strtoul(*av++, NULL, 16);
buf = map_sysmem(addr, len);
md5_wd(buf, len, output, CHUNKSZ_MD5);
unmap_sysmem(buf);
if (!verify) {
printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
for (i = 0; i < 16; i++)
printf("%02x", output[i]);
printf("\n");
if (ac > 2)
store_result(output, *av);
} else {
char *verify_str = *av++;
if (parse_verify_sum(verify_str, vsum)) {
printf("ERROR: %s does not contain a valid md5 sum\n",
verify_str);
return 1;
}
if (memcmp(output, vsum, 16) != 0) {
printf("md5 for %08lx ... %08lx ==> ", addr,
addr + len - 1);
for (i = 0; i < 16; i++)
printf("%02x", output[i]);
printf(" != ");
for (i = 0; i < 16; i++)
printf("%02x", vsum[i]);
printf(" ** ERROR **\n");
return 1;
}
}
return 0;
}
#else
static int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned long addr, len;
unsigned int i;
u8 output[16];
void *buf;
if (argc < 3)
return CMD_RET_USAGE;
addr = simple_strtoul(argv[1], NULL, 16);
len = simple_strtoul(argv[2], NULL, 16);
buf = map_sysmem(addr, len);
md5_wd(buf, len, output, CHUNKSZ_MD5);
unmap_sysmem(buf);
printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
for (i = 0; i < 16; i++)
printf("%02x", output[i]);
printf("\n");
if (argc > 3)
store_result(output, argv[3]);
return 0;
}
#endif
#ifdef CONFIG_MD5SUM_VERIFY
U_BOOT_CMD(
md5sum, 5, 1, do_md5sum,
"compute MD5 message digest",
"address count [[*]sum]\n"
" - compute MD5 message digest [save to sum]\n"
"md5sum -v address count [*]sum\n"
" - verify md5sum of memory area"
);
#else
U_BOOT_CMD(
md5sum, 4, 1, do_md5sum,
"compute MD5 message digest",
"address count [[*]sum]\n"
" - compute MD5 message digest [save to sum]"
);
#endif