147 lines
3.8 KiB
C
Executable File
147 lines
3.8 KiB
C
Executable File
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* MD5 checksum application
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*
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* Copyright (C) 2005, Olle E. Johansson, Edvina.net
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*/
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#include <asterisk/file.h>
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#include <asterisk/logger.h>
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#include <asterisk/utils.h>
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#include <asterisk/options.h>
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#include <asterisk/channel.h>
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#include <asterisk/pbx.h>
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#include <asterisk/module.h>
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#include <asterisk/lock.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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static char *tdesc_md5 = "MD5 checksum applications";
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static char *app_md5 = "MD5";
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static char *desc_md5 = "Calculate MD5 checksum";
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static char *synopsis_md5 =
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" MD5(<var>=<string>): Calculates a MD5 checksum on <string>.\n"
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"Returns hash value in a channel variable. Always return 0\n";
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static char *app_md5check = "MD5Check";
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static char *desc_md5check = "Check MD5 checksum";
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static char *synopsis_md5check =
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" MD5Check(<md5hash>,<string>): Calculates a MD5 checksum on <string>\n"
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"and compares it with the hash. Returns 0 if <md5hash> is correct for <string>.\n"
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"Jumps to priority+101 if incorrect.\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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/*--- md5_exec: Calculate MD5 checksum (hash) on given string and
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return it in channel variable ---*/
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static int md5_exec(struct ast_channel *chan, void *data)
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{
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int res=0;
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struct localuser *u;
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char *varname= NULL; /* Variable to set */
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char *string = NULL; /* String to calculate on */
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char retvar[50]; /* Return value */
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if (!data) {
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ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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memset(retvar,0, sizeof(retvar));
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string = ast_strdupa(data);
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varname = strsep(&string,"=");
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if (ast_strlen_zero(varname)) {
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ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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ast_md5_hash(retvar, string);
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pbx_builtin_setvar_helper(chan, varname, retvar);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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/*--- md5check_exec: Calculate MD5 checksum and compare it with
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existing checksum. ---*/
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static int md5check_exec(struct ast_channel *chan, void *data)
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{
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int res=0;
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struct localuser *u;
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char *hash= NULL; /* Hash to compare with */
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char *string = NULL; /* String to calculate on */
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char newhash[50]; /* Return value */
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if (!data) {
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ast_log(LOG_WARNING, "Syntax: MD5Check(<md5hash>,<string>) - missing argument!\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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memset(newhash,0, sizeof(newhash));
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string = ast_strdupa(data);
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hash = strsep(&string,"|");
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if (ast_strlen_zero(hash)) {
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ast_log(LOG_WARNING, "Syntax: MD5Check(<md5hash>,<string>) - missing argument!\n");
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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ast_md5_hash(newhash, string);
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if (!strcmp(newhash, hash)) { /* Verification ok */
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if (option_debug > 2)
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ast_log(LOG_DEBUG, "MD5 verified ok: %s -- %s\n", hash, string);
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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if (option_debug > 2)
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ast_log(LOG_DEBUG, "ERROR: MD5 not verified: %s -- %s\n", hash, string);
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if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->cid.cid_num))
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chan->priority += 100;
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else if (option_debug > 2)
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ast_log(LOG_DEBUG, "ERROR: Can't jump to exten+101 (e%s,p%d), sorry\n", chan->exten,chan->priority+101);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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int unload_module(void)
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{
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int res;
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STANDARD_HANGUP_LOCALUSERS;
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res =ast_unregister_application(app_md5);
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res |= ast_unregister_application(app_md5check);
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return res;
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}
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int load_module(void)
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{
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int res;
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res = ast_register_application(app_md5check, md5check_exec, desc_md5check, synopsis_md5check);
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res |= ast_register_application(app_md5, md5_exec, desc_md5, synopsis_md5);
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return res;
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}
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char *description(void)
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{
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return tdesc_md5;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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