cmd/hash.c

   1 /*
   2  * Copyright (c) 2012 The Chromium OS Authors.
   3  *
   4  * (C) Copyright 2011
   5  * Joe Hershberger, National Instruments, joe.hershberger@ni.com
   6  *
   7  * (C) Copyright 2000
   8  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <command.h>
  15 #include <hash.h>
  16 #include <linux/ctype.h>
  17
  18 static int do_hash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  19 {
  20         char *s;
  21         int flags = HASH_FLAG_ENV;
  22
  23 #ifdef CONFIG_HASH_VERIFY
  24         if (argc < 4)
  25                 return CMD_RET_USAGE;
  26         if (!strcmp(argv[1], "-v")) {
  27                 flags |= HASH_FLAG_VERIFY;
  28                 argc--;
  29                 argv++;
  30         }
  31 #endif
  32         /* Move forward to 'algorithm' parameter */
  33         argc--;
  34         argv++;
  35         for (s = *argv; *s; s++)
  36                 *s = tolower(*s);
  37         return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
  38 }
  39
  40 #ifdef CONFIG_HASH_VERIFY
  41 #define HARGS 6
  42 #else
  43 #define HARGS 5
  44 #endif
  45
  46 U_BOOT_CMD(
  47         hash,   HARGS,  1,      do_hash,
  48         "compute hash message digest",
  49         "algorithm address count [[*]hash_dest]\n"
  50                 "    - compute message digest [save to env var / *address]"
  51 #ifdef CONFIG_HASH_VERIFY
  52         "\nhash -v algorithm address count [*]hash\n"
  53                 "    - verify message digest of memory area to immediate value, \n"
  54                 "      env var or *address"
  55 #endif
  56 );