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bootloader/u-boot_2015_04/common/cmd_hash.c 1.21 KB
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  /*
   * Copyright (c) 2012 The Chromium OS Authors.
   *
   * (C) Copyright 2011
   * Joe Hershberger, National Instruments, joe.hershberger@ni.com
   *
   * (C) Copyright 2000
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <command.h>
  #include <hash.h>
  #include <linux/ctype.h>
  
  static int do_hash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	char *s;
  	int flags = HASH_FLAG_ENV;
  
  #ifdef CONFIG_HASH_VERIFY
  	if (argc < 4)
  		return CMD_RET_USAGE;
  	if (!strcmp(argv[1], "-v")) {
  		flags |= HASH_FLAG_VERIFY;
  		argc--;
  		argv++;
  	}
  #endif
  	/* Move forward to 'algorithm' parameter */
  	argc--;
  	argv++;
  	for (s = *argv; *s; s++)
  		*s = tolower(*s);
  	return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
  }
  
  #ifdef CONFIG_HASH_VERIFY
  #define HARGS 6
  #else
  #define HARGS 5
  #endif
  
  U_BOOT_CMD(
  	hash,	HARGS,	1,	do_hash,
  	"compute hash message digest",
  	"algorithm address count [[*]hash_dest]
  "
  		"    - compute message digest [save to env var / *address]"
  #ifdef CONFIG_HASH_VERIFY
  	"
  hash -v algorithm address count [*]hash
  "
  		"    - verify message digest of memory area to immediate value, 
  "
  		"      env var or *address"
  #endif
  );