funcs/func_base64.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2005 - 2006, Digium, Inc.
   5  * Copyright (C) 2005, 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 Use the base64 as functions
  21  *
  22  * \ingroup functions
  23  */
  24
  25 #include "asterisk.h"
  26
  27 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  28
  29 #include "asterisk/module.h"
  30 #include "asterisk/pbx.h"       /* function register/unregister */
  31 #include "asterisk/utils.h"
  32
  33 static int base64_encode(struct ast_channel *chan, const char *cmd, char *data,
  34                          char *buf, size_t len)
  35 {
  36         if (ast_strlen_zero(data)) {
  37                 ast_log(LOG_WARNING, "Syntax: BASE64_ENCODE(<data>) - missing argument!\n");
  38                 return -1;
  39         }
  40
  41         ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
  42
  43         return 0;
  44 }
  45
  46 static int base64_decode(struct ast_channel *chan, const char *cmd, char *data,
  47                          char *buf, size_t len)
  48 {
  49         if (ast_strlen_zero(data)) {
  50                 ast_log(LOG_WARNING, "Syntax: BASE64_DECODE(<base_64 string>) - missing argument!\n");
  51                 return -1;
  52         }
  53
  54         ast_base64decode((unsigned char *) buf, data, len);
  55
  56         return 0;
  57 }
  58
  59 static struct ast_custom_function base64_encode_function = {
  60         .name = "BASE64_ENCODE",
  61         .synopsis = "Encode a string in base64",
  62         .desc = "Returns the base64 string\n",
  63         .syntax = "BASE64_ENCODE(<string>)",
  64         .read = base64_encode,
  65 };
  66
  67 static struct ast_custom_function base64_decode_function = {
  68         .name = "BASE64_DECODE",
  69         .synopsis = "Decode a base64 string",
  70         .desc = "Returns the plain text string\n",
  71         .syntax = "BASE64_DECODE(<base64_string>)",
  72         .read = base64_decode,
  73 };
  74
  75 static int unload_module(void)
  76 {
  77         return ast_custom_function_unregister(&base64_encode_function) |
  78                 ast_custom_function_unregister(&base64_decode_function);
  79 }
  80
  81 static int load_module(void)
  82 {
  83         return ast_custom_function_register(&base64_encode_function) |
  84                 ast_custom_function_register(&base64_decode_function);
  85 }
  86
  87 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");