funcs/func_sha1.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2006, Digium, Inc.
   5  * Copyright (C) 2006, Claude Patry
   6  *
   7  * See http://www.asterisk.org for more information about
   8  * the Asterisk project. Please do not directly contact
   9  * any of the maintainers of this project for assistance;
  10  * the project provides a web site, mailing lists and IRC
  11  * channels for your use.
  12  *
  13  * This program is free software, distributed under the terms of
  14  * the GNU General Public License Version 2. See the LICENSE file
  15  * at the top of the source tree.
  16  */
  17
  18 /*! \file
  19  *
  20  * \brief SHA1 digest related dialplan functions
  21  *
  22  * \author Claude Patry <cpatry@gmail.com>
  23  */
  24
  25 #include "asterisk.h"
  26
  27 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33
  34 #include "asterisk/module.h"
  35 #include "asterisk/channel.h"
  36 #include "asterisk/pbx.h"
  37 #include "asterisk/logger.h"
  38 #include "asterisk/utils.h"
  39 #include "asterisk/app.h"
  40
  41 static int sha1(struct ast_channel *chan, char *cmd, char *data,
  42                 char *buf, size_t len)
  43 {
  44         *buf = '\0';
  45
  46         if (ast_strlen_zero(data)) {
  47                 ast_log(LOG_WARNING, "Syntax: SHA1(<data>) - missing argument!\n");
  48                 return -1;
  49         }
  50
  51         if (len >= 41)
  52                 ast_sha1_hash(buf, data);
  53         else {
  54                 ast_log(LOG_ERROR,
  55                                 "Insufficient space to produce SHA1 hash result (%d < 41)\n",
  56                                 (int) len);
  57         }
  58
  59         return 0;
  60 }
  61
  62 static struct ast_custom_function sha1_function = {
  63         .name = "SHA1",
  64         .synopsis = "Computes a SHA1 digest",
  65         .syntax = "SHA1(<data>)",
  66         .read = sha1,
  67         .desc = "Generate a SHA1 digest via the SHA1 algorythm.\n"
  68                 " Example:  Set(sha1hash=${SHA1(junky)})\n"
  69                 " Sets the asterisk variable sha1hash to the string '60fa5675b9303eb62f99a9cd47f9f5837d18f9a0'\n"
  70                 " which is known as his hash\n",
  71 };
  72
  73 static int unload_module(void)
  74 {
  75         return ast_custom_function_unregister(&sha1_function);
  76 }
  77
  78 static int load_module(void)
  79 {
  80         return ast_custom_function_register(&sha1_function);
  81 }
  82
  83 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "SHA-1 computation dialplan function");