cmd/md5sum.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011
   4  * Joe Hershberger, National Instruments, joe.hershberger@ni.com
   5  *
   6  * (C) Copyright 2000
   7  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <mapmem.h>
  15 #include <u-boot/md5.h>
  16 #include <asm/io.h>
  17
  18 /*
  19  * Store the resulting sum to an address or variable
  20  */
  21 static void store_result(const u8 *sum, const char *dest)
  22 {
  23         unsigned int i;
  24
  25         if (*dest == '*') {
  26                 u8 *ptr;
  27
  28                 ptr = (u8 *)simple_strtoul(dest + 1, NULL, 16);
  29                 for (i = 0; i < 16; i++)
  30                         *ptr++ = sum[i];
  31         } else {
  32                 char str_output[33];
  33                 char *str_ptr = str_output;
  34
  35                 for (i = 0; i < 16; i++) {
  36                         sprintf(str_ptr, "%02x", sum[i]);
  37                         str_ptr += 2;
  38                 }
  39                 env_set(dest, str_output);
  40         }
  41 }
  42
  43 #ifdef CONFIG_MD5SUM_VERIFY
  44 static int parse_verify_sum(char *verify_str, u8 *vsum)
  45 {
  46         if (*verify_str == '*') {
  47                 u8 *ptr;
  48
  49                 ptr = (u8 *)simple_strtoul(verify_str + 1, NULL, 16);
  50                 memcpy(vsum, ptr, 16);
  51         } else {
  52                 unsigned int i;
  53                 char *vsum_str;
  54
  55                 if (strlen(verify_str) == 32)
  56                         vsum_str = verify_str;
  57                 else {
  58                         vsum_str = env_get(verify_str);
  59                         if (vsum_str == NULL || strlen(vsum_str) != 32)
  60                                 return 1;
  61                 }
  62
  63                 for (i = 0; i < 16; i++) {
  64                         char *nullp = vsum_str + (i + 1) * 2;
  65                         char end = *nullp;
  66
  67                         *nullp = '\0';
  68                         *(u8 *)(vsum + i) =
  69                                 simple_strtoul(vsum_str + (i * 2), NULL, 16);
  70                         *nullp = end;
  71                 }
  72         }
  73         return 0;
  74 }
  75
  76 int do_md5sum(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  77 {
  78         ulong addr, len;
  79         unsigned int i;
  80         u8 output[16];
  81         u8 vsum[16];
  82         int verify = 0;
  83         int ac;
  84         char * const *av;
  85         void *buf;
  86
  87         if (argc < 3)
  88                 return CMD_RET_USAGE;
  89
  90         av = argv + 1;
  91         ac = argc - 1;
  92         if (strcmp(*av, "-v") == 0) {
  93                 verify = 1;
  94                 av++;
  95                 ac--;
  96                 if (ac < 3)
  97                         return CMD_RET_USAGE;
  98         }
  99
 100         addr = simple_strtoul(*av++, NULL, 16);
 101         len = simple_strtoul(*av++, NULL, 16);
 102
 103         buf = map_sysmem(addr, len);
 104         md5_wd(buf, len, output, CHUNKSZ_MD5);
 105         unmap_sysmem(buf);
 106
 107         if (!verify) {
 108                 printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
 109                 for (i = 0; i < 16; i++)
 110                         printf("%02x", output[i]);
 111                 printf("\n");
 112
 113                 if (ac > 2)
 114                         store_result(output, *av);
 115         } else {
 116                 char *verify_str = *av++;
 117
 118                 if (parse_verify_sum(verify_str, vsum)) {
 119                         printf("ERROR: %s does not contain a valid md5 sum\n",
 120                                 verify_str);
 121                         return 1;
 122                 }
 123                 if (memcmp(output, vsum, 16) != 0) {
 124                         printf("md5 for %08lx ... %08lx ==> ", addr,
 125                                 addr + len - 1);
 126                         for (i = 0; i < 16; i++)
 127                                 printf("%02x", output[i]);
 128                         printf(" != ");
 129                         for (i = 0; i < 16; i++)
 130                                 printf("%02x", vsum[i]);
 131                         printf(" ** ERROR **\n");
 132                         return 1;
 133                 }
 134         }
 135
 136         return 0;
 137 }
 138 #else
 139 static int do_md5sum(struct cmd_tbl *cmdtp, int flag, int argc,
 140                      char *const argv[])
 141 {
 142         unsigned long addr, len;
 143         unsigned int i;
 144         u8 output[16];
 145         void *buf;
 146
 147         if (argc < 3)
 148                 return CMD_RET_USAGE;
 149
 150         addr = simple_strtoul(argv[1], NULL, 16);
 151         len = simple_strtoul(argv[2], NULL, 16);
 152
 153         buf = map_sysmem(addr, len);
 154         md5_wd(buf, len, output, CHUNKSZ_MD5);
 155         unmap_sysmem(buf);
 156
 157         printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
 158         for (i = 0; i < 16; i++)
 159                 printf("%02x", output[i]);
 160         printf("\n");
 161
 162         if (argc > 3)
 163                 store_result(output, argv[3]);
 164
 165         return 0;
 166 }
 167 #endif
 168
 169 #ifdef CONFIG_MD5SUM_VERIFY
 170 U_BOOT_CMD(
 171         md5sum, 5,      1,      do_md5sum,
 172         "compute MD5 message digest",
 173         "address count [[*]sum]\n"
 174                 "    - compute MD5 message digest [save to sum]\n"
 175         "md5sum -v address count [*]sum\n"
 176                 "    - verify md5sum of memory area"
 177 );
 178 #else
 179 U_BOOT_CMD(
 180         md5sum, 4,      1,      do_md5sum,
 181         "compute MD5 message digest",
 182         "address count [[*]sum]\n"
 183                 "    - compute MD5 message digest [save to sum]"
 184 );
 185 #endif