common/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  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <hash.h>
  29 #include <linux/ctype.h>
  30
  31 static int do_hash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  32 {
  33         char *s;
  34 #ifdef CONFIG_HASH_VERIFY
  35         int flags = HASH_FLAG_ENV;
  36
  37         if (argc < 4)
  38                 return CMD_RET_USAGE;
  39         if (!strcmp(argv[1], "-v")) {
  40                 flags |= HASH_FLAG_VERIFY;
  41                 argc--;
  42                 argv++;
  43         }
  44 #else
  45         const int flags = HASH_FLAG_ENV;
  46 #endif
  47         /* Move forward to 'algorithm' parameter */
  48         argc--;
  49         argv++;
  50         for (s = *argv; *s; s++)
  51                 *s = tolower(*s);
  52         return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
  53 }
  54
  55 #ifdef CONFIG_HASH_VERIFY
  56 U_BOOT_CMD(
  57         hash,   6,      1,      do_hash,
  58         "compute hash message digest",
  59         "algorithm address count [[*]sum_dest]\n"
  60                 "    - compute message digest [save to env var / *address]\n"
  61         "hash -v algorithm address count [*]sum\n"
  62                 "    - verify hash of memory area with env var / *address"
  63 );
  64 #else
  65 U_BOOT_CMD(
  66         hash,   5,      1,      do_hash,
  67         "compute message digest",
  68         "algorithm address count [[*]sum_dest]\n"
  69                 "    - compute message digest [save to env var / *address]"
  70 );
  71 #endif