Fri Aug 24 02:22:15 2007

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__, "$Revision$")
00028 
00029 #include <stdio.h>
00030 #include <stdlib.h>
00031 #include <string.h>
00032 #include <sys/types.h>
00033 
00034 #include "asterisk/module.h"
00035 #include "asterisk/channel.h"
00036 #include "asterisk/pbx.h"
00037 #include "asterisk/logger.h"
00038 #include "asterisk/utils.h"
00039 #include "asterisk/app.h"
00040 
00041 static int base64_encode(struct ast_channel *chan, char *cmd, char *data,
00042           char *buf, size_t len)
00043 {
00044    if (ast_strlen_zero(data)) {
00045       ast_log(LOG_WARNING, "Syntax: BASE64_ENCODE(<data>) - missing argument!\n");
00046       return -1;
00047    }
00048 
00049    ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
00050 
00051    return 0;
00052 }
00053 
00054 static int base64_decode(struct ast_channel *chan, char *cmd, char *data,
00055           char *buf, size_t len)
00056 {
00057    if (ast_strlen_zero(data)) {
00058       ast_log(LOG_WARNING, "Syntax: BASE64_DECODE(<base_64 string>) - missing argument!\n");
00059       return -1;
00060    }
00061 
00062    ast_base64decode((unsigned char *) buf, data, len);
00063 
00064    return 0;
00065 }
00066 
00067 static struct ast_custom_function base64_encode_function = {
00068    .name = "BASE64_ENCODE",
00069    .synopsis = "Encode a string in base64",
00070    .desc = "Returns the base64 string\n",
00071    .syntax = "BASE64_ENCODE(<string>)",
00072    .read = base64_encode,
00073 };
00074 
00075 static struct ast_custom_function base64_decode_function = {
00076    .name = "BASE64_DECODE",
00077    .synopsis = "Decode a base64 string",
00078    .desc = "Returns the plain text string\n",
00079    .syntax = "BASE64_DECODE(<base64_string>)",
00080    .read = base64_decode,
00081 };
00082 
00083 static int unload_module(void)
00084 {
00085    return ast_custom_function_unregister(&base64_encode_function) |
00086       ast_custom_function_unregister(&base64_decode_function);
00087 }
00088 
00089 static int load_module(void)
00090 {
00091    return ast_custom_function_register(&base64_encode_function) |
00092       ast_custom_function_register(&base64_decode_function);
00093 }
00094 
00095 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");

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