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  */
  23
  24 #include "asterisk.h"
  25
  26 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/types.h>
  32
  33 #include "asterisk/module.h"
  34 #include "asterisk/channel.h"
  35 #include "asterisk/pbx.h"
  36 #include "asterisk/logger.h"
  37 #include "asterisk/utils.h"
  38 #include "asterisk/app.h"
  39
  40 static int base64_encode(struct ast_channel *chan, char *cmd, char *data,
  41                          char *buf, size_t len)
  42 {
  43         if (ast_strlen_zero(data)) {
  44                 ast_log(LOG_WARNING, "Syntax: BASE64_ENCODE(<data>) - missing argument!\n");
  45                 return -1;
  46         }
  47
  48         ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
  49
  50         return 0;
  51 }
  52
  53 static int base64_decode(struct ast_channel *chan, char *cmd, char *data,
  54                          char *buf, size_t len)
  55 {
  56         if (ast_strlen_zero(data)) {
  57                 ast_log(LOG_WARNING, "Syntax: BASE64_DECODE(<base_64 string>) - missing argument!\n");
  58                 return -1;
  59         }
  60
  61         ast_base64decode((unsigned char *) buf, data, len);
  62
  63         return 0;
  64 }
  65
  66 static struct ast_custom_function base64_encode_function = {
  67         .name = "BASE64_ENCODE",
  68         .synopsis = "Encode a string in base64",
  69         .desc = "Returns the base64 string\n",
  70         .syntax = "BASE64_ENCODE(<string>)",
  71         .read = base64_encode,
  72 };
  73
  74 static struct ast_custom_function base64_decode_function = {
  75         .name = "BASE64_DECODE",
  76         .synopsis = "Decode a base64 string",
  77         .desc = "Returns the plain text string\n",
  78         .syntax = "BASE64_DECODE(<base64_string>)",
  79         .read = base64_decode,
  80 };
  81
  82 static int unload_module(void)
  83 {
  84         return ast_custom_function_unregister(&base64_encode_function) |
  85                 ast_custom_function_unregister(&base64_decode_function);
  86 }
  87
  88 static int load_module(void)
  89 {
  90         return ast_custom_function_register(&base64_encode_function) |
  91                 ast_custom_function_register(&base64_decode_function);
  92 }
  93
  94 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");