265 lines
7.1 KiB
C
265 lines
7.1 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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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 Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Execute arbitrary authenticate commands
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.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/app.h"
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#include "asterisk/astdb.h"
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#include "asterisk/utils.h"
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enum {
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OPT_ACCOUNT = (1 << 0),
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OPT_DATABASE = (1 << 1),
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OPT_MULTIPLE = (1 << 3),
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OPT_REMOVE = (1 << 4),
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};
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AST_APP_OPTIONS(auth_app_options, {
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AST_APP_OPTION('a', OPT_ACCOUNT),
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AST_APP_OPTION('d', OPT_DATABASE),
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AST_APP_OPTION('m', OPT_MULTIPLE),
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AST_APP_OPTION('r', OPT_REMOVE),
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});
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static const char app[] = "Authenticate";
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/*** DOCUMENTATION
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<application name="Authenticate" language="en_US">
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<synopsis>
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Authenticate a user
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</synopsis>
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<syntax>
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<parameter name="password" required="true">
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<para>Password the user should know</para>
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</parameter>
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<parameter name="options" required="false">
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<optionlist>
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<option name="a">
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<para>Set the channels' account code to the password that is entered</para>
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</option>
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<option name="d">
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<para>Interpret the given path as database key, not a literal file</para>
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</option>
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<option name="m">
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<para>Interpret the given path as a file which contains a list of account
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codes and password hashes delimited with <literal>:</literal>, listed one per line in
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the file. When one of the passwords is matched, the channel will have
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its account code set to the corresponding account code in the file.</para>
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</option>
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<option name="r">
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<para>Remove the database key upon successful entry (valid with <literal>d</literal> only)</para>
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</option>
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</optionlist>
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</parameter>
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<parameter name="maxdigits" required="false">
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<para>maximum acceptable number of digits. Stops reading after
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maxdigits have been entered (without requiring the user to press the <literal>#</literal> key).
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Defaults to 0 - no limit - wait for the user press the <literal>#</literal> key.</para>
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</parameter>
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<parameter name="prompt" required="false">
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<para>Override the agent-pass prompt file.</para>
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</parameter>
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</syntax>
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<description>
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<para>This application asks the caller to enter a given password in order to continue dialplan execution.</para>
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<para>If the password begins with the <literal>/</literal> character,
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it is interpreted as a file which contains a list of valid passwords, listed 1 password per line in the file.</para>
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<para>When using a database key, the value associated with the key can be anything.</para>
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<para>Users have three attempts to authenticate before the channel is hung up.</para>
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</description>
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<see-also>
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<ref type="application">VMAuthenticate</ref>
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<ref type="application">DISA</ref>
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</see-also>
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</application>
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***/
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static int auth_exec(struct ast_channel *chan, const char *data)
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{
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int res = 0, retries, maxdigits;
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char passwd[256], *prompt = "agent-pass", *argcopy = NULL;
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struct ast_flags flags = {0};
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AST_DECLARE_APP_ARGS(arglist,
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AST_APP_ARG(password);
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AST_APP_ARG(options);
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AST_APP_ARG(maxdigits);
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AST_APP_ARG(prompt);
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);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Authenticate requires an argument(password)\n");
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return -1;
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}
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if (chan->_state != AST_STATE_UP) {
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if ((res = ast_answer(chan)))
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return -1;
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}
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argcopy = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(arglist, argcopy);
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if (!ast_strlen_zero(arglist.options))
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ast_app_parse_options(auth_app_options, &flags, NULL, arglist.options);
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if (!ast_strlen_zero(arglist.maxdigits)) {
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maxdigits = atoi(arglist.maxdigits);
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if ((maxdigits<1) || (maxdigits>sizeof(passwd)-2))
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maxdigits = sizeof(passwd) - 2;
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} else {
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maxdigits = sizeof(passwd) - 2;
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}
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if (!ast_strlen_zero(arglist.prompt)) {
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prompt = arglist.prompt;
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} else {
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prompt = "agent-pass";
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}
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/* Start asking for password */
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for (retries = 0; retries < 3; retries++) {
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if ((res = ast_app_getdata(chan, prompt, passwd, maxdigits, 0)) < 0)
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break;
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res = 0;
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if (arglist.password[0] != '/') {
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/* Compare against a fixed password */
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if (!strcmp(passwd, arglist.password))
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break;
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} else if (ast_test_flag(&flags,OPT_DATABASE)) {
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char tmp[256];
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/* Compare against a database key */
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if (!ast_db_get(arglist.password + 1, passwd, tmp, sizeof(tmp))) {
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/* It's a good password */
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if (ast_test_flag(&flags,OPT_REMOVE))
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ast_db_del(arglist.password + 1, passwd);
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break;
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}
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} else {
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/* Compare against a file */
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FILE *f;
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char buf[256] = "", md5passwd[33] = "", *md5secret = NULL;
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if (!(f = fopen(arglist.password, "r"))) {
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ast_log(LOG_WARNING, "Unable to open file '%s' for authentication: %s\n", arglist.password, strerror(errno));
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continue;
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}
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for (;;) {
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size_t len;
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if (feof(f))
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break;
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if (!fgets(buf, sizeof(buf), f)) {
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continue;
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}
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if (ast_strlen_zero(buf))
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continue;
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len = strlen(buf) - 1;
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if (buf[len] == '\n')
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buf[len] = '\0';
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if (ast_test_flag(&flags, OPT_MULTIPLE)) {
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md5secret = buf;
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strsep(&md5secret, ":");
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if (!md5secret)
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continue;
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ast_md5_hash(md5passwd, passwd);
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if (!strcmp(md5passwd, md5secret)) {
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if (ast_test_flag(&flags,OPT_ACCOUNT))
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ast_cdr_setaccount(chan, buf);
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break;
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}
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} else {
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if (!strcmp(passwd, buf)) {
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if (ast_test_flag(&flags, OPT_ACCOUNT))
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ast_cdr_setaccount(chan, buf);
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break;
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}
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}
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}
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fclose(f);
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if (!ast_strlen_zero(buf)) {
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if (ast_test_flag(&flags, OPT_MULTIPLE)) {
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if (md5secret && !strcmp(md5passwd, md5secret))
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break;
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} else {
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if (!strcmp(passwd, buf))
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break;
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}
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}
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}
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prompt = "auth-incorrect";
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}
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if ((retries < 3) && !res) {
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if (ast_test_flag(&flags,OPT_ACCOUNT) && !ast_test_flag(&flags,OPT_MULTIPLE))
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ast_cdr_setaccount(chan, passwd);
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if (!(res = ast_streamfile(chan, "auth-thankyou", chan->language)))
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res = ast_waitstream(chan, "");
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} else {
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if (!ast_streamfile(chan, "vm-goodbye", chan->language))
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res = ast_waitstream(chan, "");
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res = -1;
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}
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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if (ast_register_application_xml(app, auth_exec))
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return AST_MODULE_LOAD_FAILURE;
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return AST_MODULE_LOAD_SUCCESS;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Authentication Application");
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