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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2005, Olle E. Johansson, Edvina.net
*
* 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 MD5 checksum application
*
* \todo Remove this deprecated application in 1.3dev
* \ingroup applications
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/options.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
static char *tdesc_md5 = "MD5 checksum applications";
static char *app_md5 = "MD5";
static char *desc_md5 = "Calculate MD5 checksum";
static char *synopsis_md5 =
" MD5(<var>=<string>): Calculates a MD5 checksum on <string>.\n"
"Returns hash value in a channel variable. \n";
static char *app_md5check = "MD5Check";
static char *desc_md5check = "Check MD5 checksum";
static char *synopsis_md5check =
" MD5Check(<md5hash>|<string>[|options]): Calculates a MD5 checksum on <string>\n"
"and compares it with the hash. Returns 0 if <md5hash> is correct for <string>.\n"
"The option string may contain zero or more of the following characters:\n"
" 'j' -- jump to priority n+101 if the hash and string do not match \n"
"This application sets the following channel variable upon completion:\n"
" CHECKMD5STATUS The status of the MD5 check, one of the following\n"
" MATCH | NOMATCH\n";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
/*--- md5_exec: Calculate MD5 checksum (hash) on given string and
return it in channel variable ---*/
static int md5_exec(struct ast_channel *chan, void *data)
{
int res=0;
struct localuser *u;
char *varname= NULL; /* Variable to set */
char *string = NULL; /* String to calculate on */
char retvar[50]; /* Return value */
static int dep_warning = 0;
if (!dep_warning) {
ast_log(LOG_WARNING, "This application has been deprecated, please use the MD5 function instead.\n");
dep_warning = 1;
}
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
return -1;
}
LOCAL_USER_ADD(u);
memset(retvar,0, sizeof(retvar));
string = ast_strdupa(data);
varname = strsep(&string,"=");
if (ast_strlen_zero(varname)) {
ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
LOCAL_USER_REMOVE(u);
return -1;
}
ast_md5_hash(retvar, string);
pbx_builtin_setvar_helper(chan, varname, retvar);
LOCAL_USER_REMOVE(u);
return res;
}
/*--- md5check_exec: Calculate MD5 checksum and compare it with
existing checksum. ---*/
static int md5check_exec(struct ast_channel *chan, void *data)
{
int res=0;
struct localuser *u;
char *string = NULL; /* String to calculate on */
char newhash[50]; /* Return value */
static int dep_warning = 0;
int priority_jump = 0;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(md5hash);
AST_APP_ARG(string);
AST_APP_ARG(options);
);
if (!dep_warning) {
ast_log(LOG_WARNING, "This application has been deprecated, please use the CHECK_MD5 function instead.\n");
dep_warning = 1;
}
LOCAL_USER_ADD(u);
if (!(string = ast_strdupa(data))) {
ast_log(LOG_WARNING, "Memory Error!\n");
LOCAL_USER_REMOVE(u);
return -1;
}
AST_STANDARD_APP_ARGS(args, string);
if (args.options) {
if (strchr(args.options, 'j'))
priority_jump = 1;
}
if (ast_strlen_zero(args.md5hash) || ast_strlen_zero(args.string)) {
ast_log(LOG_WARNING, "Syntax: MD5Check(<md5hash>|<string>[|options]) - missing argument!\n");
LOCAL_USER_REMOVE(u);
return -1;
}
memset(newhash,0, sizeof(newhash));
ast_md5_hash(newhash, args.string);
if (!strcmp(newhash, args.md5hash)) { /* Verification ok */
if (option_debug > 2)
ast_log(LOG_DEBUG, "MD5 verified ok: %s -- %s\n", args.md5hash, args.string);
pbx_builtin_setvar_helper(chan, "CHECKMD5STATUS", "MATCH");
LOCAL_USER_REMOVE(u);
return 0;
}
if (option_debug > 2)
ast_log(LOG_DEBUG, "ERROR: MD5 not verified: %s -- %s\n", args.md5hash, args.string);
pbx_builtin_setvar_helper(chan, "CHECKMD5STATUS", "NOMATCH");
if (priority_jump || option_priority_jumping) {
if (ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101))
if (option_debug > 2)
ast_log(LOG_DEBUG, "Can't jump to exten+101 (e%s,p%d), sorry\n", chan->exten,chan->priority+101);
}
LOCAL_USER_REMOVE(u);
return res;
}
int unload_module(void)
{
int res;
res = ast_unregister_application(app_md5);
res |= ast_unregister_application(app_md5check);
STANDARD_HANGUP_LOCALUSERS;
return res;
}
int load_module(void)
{
int res;
res = ast_register_application(app_md5check, md5check_exec, desc_md5check, synopsis_md5check);
res |= ast_register_application(app_md5, md5_exec, desc_md5, synopsis_md5);
return res;
}
char *description(void)
{
return tdesc_md5;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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