Fri Jun 19 12:09:44 2009

Asterisk developer's documentation


func_base64.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 2005 - 2006, Digium, Inc.
00005  * Copyright (C) 2005, Claude Patry
00006  *
00007  * See http://www.asterisk.org for more information about
00008  * the Asterisk project. Please do not directly contact
00009  * any of the maintainers of this project for assistance;
00010  * the project provides a web site, mailing lists and IRC
00011  * channels for your use.
00012  *
00013  * This program is free software, distributed under the terms of
00014  * the GNU General Public License Version 2. See the LICENSE file
00015  * at the top of the source tree.
00016  */
00017 
00018 /*! \file
00019  *
00020  * \brief Use the base64 as functions
00021  * 
00022  * \ingroup functions
00023  */
00024 
00025 #include "asterisk.h"
00026 
00027 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 89430 $")
00028 
00029 #include "asterisk/module.h"
00030 #include "asterisk/pbx.h"  /* function register/unregister */
00031 #include "asterisk/utils.h"
00032 
00033 static int base64_encode(struct ast_channel *chan, const char *cmd, char *data,
00034           char *buf, size_t len)
00035 {
00036    if (ast_strlen_zero(data)) {
00037       ast_log(LOG_WARNING, "Syntax: BASE64_ENCODE(<data>) - missing argument!\n");
00038       return -1;
00039    }
00040 
00041    ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
00042 
00043    return 0;
00044 }
00045 
00046 static int base64_decode(struct ast_channel *chan, const char *cmd, char *data,
00047           char *buf, size_t len)
00048 {
00049    if (ast_strlen_zero(data)) {
00050       ast_log(LOG_WARNING, "Syntax: BASE64_DECODE(<base_64 string>) - missing argument!\n");
00051       return -1;
00052    }
00053 
00054    ast_base64decode((unsigned char *) buf, data, len);
00055 
00056    return 0;
00057 }
00058 
00059 static struct ast_custom_function base64_encode_function = {
00060    .name = "BASE64_ENCODE",
00061    .synopsis = "Encode a string in base64",
00062    .desc = "Returns the base64 string\n",
00063    .syntax = "BASE64_ENCODE(<string>)",
00064    .read = base64_encode,
00065 };
00066 
00067 static struct ast_custom_function base64_decode_function = {
00068    .name = "BASE64_DECODE",
00069    .synopsis = "Decode a base64 string",
00070    .desc = "Returns the plain text string\n",
00071    .syntax = "BASE64_DECODE(<base64_string>)",
00072    .read = base64_decode,
00073 };
00074 
00075 static int unload_module(void)
00076 {
00077    return ast_custom_function_unregister(&base64_encode_function) |
00078       ast_custom_function_unregister(&base64_decode_function);
00079 }
00080 
00081 static int load_module(void)
00082 {
00083    return ast_custom_function_register(&base64_encode_function) |
00084       ast_custom_function_register(&base64_decode_function);
00085 }
00086 
00087 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");

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