cmd/md5sum.c

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