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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2005 - 2006, Digium, Inc.
* Copyright (C) 2005, Claude Patry
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Use the base64 as functions
*
* \ingroup functions
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/pbx.h" /* function register/unregister */
#include "asterisk/utils.h"
/*** DOCUMENTATION
<function name="BASE64_ENCODE" language="en_US">
<synopsis>
Encode a string in base64.
</synopsis>
<syntax>
<parameter name="string" required="true">
<para>Input string</para>
</parameter>
</syntax>
<description>
<para>Returns the base64 string.</para>
</description>
<see-also>
<ref type="application">BASE64_DECODE</ref>
<ref type="application">AES_DECRYPT</ref>
<ref type="application">AES_ENCRYPT</ref>
</see-also>
</function>
<function name="BASE64_DECODE" language="en_US">
<synopsis>
Decode a base64 string.
</synopsis>
<syntax>
<parameter name="string" required="true">
<para>Input string.</para>
</parameter>
</syntax>
<description>
<para>Returns the plain text string.</para>
</description>
<see-also>
<ref type="application">BASE64_ENCODE</ref>
<ref type="application">AES_DECRYPT</ref>
<ref type="application">AES_ENCRYPT</ref>
</see-also>
</function>
***/
static int base64_encode(struct ast_channel *chan, const char *cmd, char *data,
char *buf, size_t len)
{
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "Syntax: BASE64_ENCODE(<data>) - missing argument!\n");
return -1;
}
ast_base64encode(buf, (unsigned char *) data, strlen(data), len);
return 0;
}
static int base64_decode(struct ast_channel *chan, const char *cmd, char *data,
char *buf, size_t len)
{
int decoded_len;
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "Syntax: BASE64_DECODE(<base_64 string>) - missing argument!\n");
return -1;
}
decoded_len = ast_base64decode((unsigned char *) buf, data, len);
if (decoded_len <= (len - 1)) { /* if not truncated, */
buf[decoded_len] = '\0';
} else {
buf[len - 1] = '\0';
}
return 0;
}
static struct ast_custom_function base64_encode_function = {
.name = "BASE64_ENCODE",
.read = base64_encode,
};
static struct ast_custom_function base64_decode_function = {
.name = "BASE64_DECODE",
.read = base64_decode,
};
static int unload_module(void)
{
return ast_custom_function_unregister(&base64_encode_function) |
ast_custom_function_unregister(&base64_decode_function);
}
static int load_module(void)
{
return ast_custom_function_register(&base64_encode_function) |
ast_custom_function_register(&base64_decode_function);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "base64 encode/decode dialplan functions");
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