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                str_ptr = '\0';
  37                setenv(dest, str_output);
  38        }
  39}
  40
  41#ifdef CONFIG_MD5SUM_VERIFY
  42static int parse_verify_sum(char *verify_str, u8 *vsum)
  43{
  44        if (*verify_str == '*') {
  45                u8 *ptr;
  46
  47                ptr = (u8 *)simple_strtoul(verify_str + 1, NULL, 16);
  48                memcpy(vsum, ptr, 16);
  49        } else {
  50                unsigned int i;
  51                char *vsum_str;
  52
  53                if (strlen(verify_str) == 32)
  54                        vsum_str = verify_str;
  55                else {
  56                        vsum_str = getenv(verify_str);
  57                        if (vsum_str == NULL || strlen(vsum_str) != 32)
  58                                return 1;
  59                }
  60
  61                for (i = 0; i < 16; i++) {
  62                        char *nullp = vsum_str + (i + 1) * 2;
  63                        char end = *nullp;
  64
  65                        *nullp = '\0';
  66                        *(u8 *)(vsum + i) =
  67                                simple_strtoul(vsum_str + (i * 2), NULL, 16);
  68                        *nullp = end;
  69                }
  70        }
  71        return 0;
  72}
  73
  74int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  75{
  76        ulong addr, len;
  77        unsigned int i;
  78        u8 output[16];
  79        u8 vsum[16];
  80        int verify = 0;
  81        int ac;
  82        char * const *av;
  83
  84        if (argc < 3)
  85                return CMD_RET_USAGE;
  86
  87        av = argv + 1;
  88        ac = argc - 1;
  89        if (strcmp(*av, "-v") == 0) {
  90                verify = 1;
  91                av++;
  92                ac--;
  93                if (ac < 3)
  94                        return CMD_RET_USAGE;
  95        }
  96
  97        addr = simple_strtoul(*av++, NULL, 16);
  98        len = simple_strtoul(*av++, NULL, 16);
  99
 100        md5_wd((unsigned char *) addr, len, output, CHUNKSZ_MD5);
 101
 102        if (!verify) {
 103                printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
 104                for (i = 0; i < 16; i++)
 105                        printf("%02x", output[i]);
 106                printf("\n");
 107
 108                if (ac > 2)
 109                        store_result(output, *av);
 110        } else {
 111                char *verify_str = *av++;
 112
 113                if (parse_verify_sum(verify_str, vsum)) {
 114                        printf("ERROR: %s does not contain a valid md5 sum\n",
 115                                verify_str);
 116                        return 1;
 117                }
 118                if (memcmp(output, vsum, 16) != 0) {
 119                        printf("md5 for %08lx ... %08lx ==> ", addr,
 120                                addr + len - 1);
 121                        for (i = 0; i < 16; i++)
 122                                printf("%02x", output[i]);
 123                        printf(" != ");
 124                        for (i = 0; i < 16; i++)
 125                                printf("%02x", vsum[i]);
 126                        printf(" ** ERROR **\n");
 127                        return 1;
 128                }
 129        }
 130
 131        return 0;
 132}
 133#else
 134static int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 135{
 136        unsigned long addr, len;
 137        unsigned int i;
 138        u8 output[16];
 139
 140        if (argc < 3)
 141                return CMD_RET_USAGE;
 142
 143        addr = simple_strtoul(argv[1], NULL, 16);
 144        len = simple_strtoul(argv[2], NULL, 16);
 145
 146        md5_wd((unsigned char *) addr, len, output, CHUNKSZ_MD5);
 147        printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
 148        for (i = 0; i < 16; i++)
 149                printf("%02x", output[i]);
 150        printf("\n");
 151
 152        if (argc > 3)
 153                store_result(output, argv[3]);
 154
 155        return 0;
 156}
 157#endif
 158
 159#ifdef CONFIG_MD5SUM_VERIFY
 160U_BOOT_CMD(
 161        md5sum, 5,      1,      do_md5sum,
 162        "compute MD5 message digest",
 163        "address count [[*]sum]\n"
 164                "    - compute MD5 message digest [save to sum]\n"
 165        "md5sum -v address count [*]sum\n"
 166                "    - verify md5sum of memory area"
 167);
 168#else
 169U_BOOT_CMD(
 170        md5sum, 4,      1,      do_md5sum,
 171        "compute MD5 message digest",
 172        "address count [[*]sum]\n"
 173                "    - compute MD5 message digest [save to sum]"
 174);
 175#endif
 176