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  * 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 #ifdef CONFIG_HASH_VERIFY
  22         int flags = HASH_FLAG_ENV;
  23
  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 #else
  32         const int flags = HASH_FLAG_ENV;
  33 #endif
  34         /* Move forward to 'algorithm' parameter */
  35         argc--;
  36         argv++;
  37         for (s = *argv; *s; s++)
  38                 *s = tolower(*s);
  39         return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
  40 }
  41
  42 #ifdef CONFIG_HASH_VERIFY
  43 U_BOOT_CMD(
  44         hash,   6,      1,      do_hash,
  45         "compute hash message digest",
  46         "algorithm address count [[*]sum_dest]\n"
  47                 "    - compute message digest [save to env var / *address]\n"
  48         "hash -v algorithm address count [*]sum\n"
  49                 "    - verify hash of memory area with env var / *address"
  50 );
  51 #else
  52 U_BOOT_CMD(
  53         hash,   5,      1,      do_hash,
  54         "compute message digest",
  55         "algorithm address count [[*]sum_dest]\n"
  56                 "    - compute message digest [save to env var / *address]"
  57 );
  58 #endif