LXR uboot/common/cmd

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