cmd/hash.c

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