mirror of
https://github.com/webmin/webmin.git
synced 2026-02-09 00:39:57 +00:00
4493 lines
116 KiB
Perl
Executable File
4493 lines
116 KiB
Perl
Executable File
#!/usr/local/bin/perl
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# A very simple perl web server used by Webmin
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# Require basic libraries
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package miniserv;
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use Socket;
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use POSIX;
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use Time::Local;
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# Find and read config file
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if (@ARGV != 1) {
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die "Usage: miniserv.pl <config file>";
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}
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if ($ARGV[0] =~ /^([a-z]:)?\//i) {
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$config_file = $ARGV[0];
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}
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else {
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chop($pwd = `pwd`);
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$config_file = "$pwd/$ARGV[0]";
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}
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%config = &read_config_file($config_file);
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# Check is SSL is enabled and available
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if ($config{'ssl'}) {
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eval "use Net::SSLeay";
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if (!$@) {
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$use_ssl = 1;
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# These functions only exist for SSLeay 1.0
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eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
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eval "Net::SSLeay::load_error_strings()";
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if ($config{'no_ssl2'}) {
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eval "Net::SSLeay::CTX_set_options($ctx,&Net::SSLeay::OP_NO_SSLv2)";
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}
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if (defined(&Net::SSLeay::X509_STORE_CTX_get_current_cert) &&
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defined(&Net::SSLeay::CTX_load_verify_locations) &&
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defined(&Net::SSLeay::CTX_set_verify)) {
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$client_certs = 1;
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}
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}
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}
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# Check if the syslog module is available to log hacking attempts
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if ($config{'syslog'} && !$config{'inetd'}) {
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eval "use Sys::Syslog qw(:DEFAULT setlogsock)";
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if (!$@) {
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$use_syslog = 1;
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}
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}
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# check if the TCP-wrappers module is available
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if ($config{'libwrap'}) {
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eval "use Authen::Libwrap qw(hosts_ctl STRING_UNKNOWN)";
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if (!$@) {
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$use_libwrap = 1;
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}
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}
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# Get miniserv's perl path and location
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$miniserv_path = $0;
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open(SOURCE, $miniserv_path);
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<SOURCE> =~ /^#!(\S+)/;
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$perl_path = $1;
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close(SOURCE);
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if (!-x $perl_path) {
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$perl_path = $^X;
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}
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if (-l $perl_path) {
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$linked_perl_path = readlink($perl_path);
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}
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@miniserv_argv = @ARGV;
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# Check vital config options
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&update_vital_config();
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$sidname = $config{'sidname'};
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die "Session authentication cannot be used in inetd mode"
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if ($config{'inetd'} && $config{'session'});
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# check if the PAM module is available to authenticate
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if (!$config{'no_pam'}) {
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eval "use Authen::PAM;";
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if (!$@) {
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# check if the PAM authentication can be used by opening a
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# PAM handle
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local $pamh;
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if (ref($pamh = new Authen::PAM($config{'pam'}, "root",
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\&pam_conv_func))) {
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# Now test a login to see if /etc/pam.d/XXX is set
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# up properly.
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$pam_conv_func_called = 0;
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$pam_username = "test";
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$pam_password = "test";
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$pamh->pam_authenticate();
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if ($pam_conv_func_called) {
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$pam_msg = "PAM authentication enabled";
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$use_pam = 1;
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}
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else {
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$pam_msg = "PAM test failed - maybe /etc/pam.d/$config{'pam'} does not exist";
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}
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}
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else {
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$pam_msg = "PAM initialization of Authen::PAM failed";
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}
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}
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else {
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$pam_msg = "Perl module Authen::PAM needed for PAM is not installed : $@";
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}
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}
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if ($config{'pam_only'} && !$use_pam) {
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$pam_msg2 = "PAM use is mandatory, but could not be enabled!";
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}
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# Check if the User::Utmp perl module is installed
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if ($config{'utmp'}) {
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eval "use User::Utmp;";
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if (!$@) {
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$write_utmp = 1;
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$utmp_msg = "UTMP logging enabled";
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}
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else {
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$utmp_msg = "Perl module User::Utmp needed for Utmp logging is not installed : $@";
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}
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}
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# See if the crypt function fails
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eval "crypt('foo', 'xx')";
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if ($@) {
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eval "use Crypt::UnixCrypt";
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if (!$@) {
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$use_perl_crypt = 1;
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$crypt_msg = "Using Crypt::UnixCrypt for password encryption\n";
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}
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else {
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$crypt_msg = "crypt() function un-implemented, and Crypt::UnixCrypt not installed - password authentication will probably fail\n";
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}
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}
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# Check if /dev/urandom really generates random IDs, by calling it twice
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local $rand1 = &generate_random_id("foo", 1);
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local $rand2 = &generate_random_id("foo", 2);
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local $rand_msg;
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if ($rand1 eq $rand2) {
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$bad_urandom = 1;
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$rand_msg = "Random number generator file /dev/urandom is not reliable";
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}
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# Check if we can call sudo
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if ($config{'sudo'} && &has_command("sudo")) {
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eval "use IO::Pty";
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if (!$@) {
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$use_sudo = 1;
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}
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else {
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$sudo_msg = "Perl module IO::Pty needed for calling sudo is not installed : $@";
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}
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}
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# init days and months for http_date
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@weekday = ( "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" );
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@month = ( "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" );
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# Change dir to the server root
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@roots = ( $config{'root'} );
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for($i=0; defined($config{"extraroot_$i"}); $i++) {
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push(@roots, $config{"extraroot_$i"});
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}
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chdir($roots[0]);
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eval { $user_homedir = (getpwuid($<))[7]; };
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if ($@) {
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# getpwuid doesn't work on windows
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$user_homedir = $ENV{"HOME"} || $ENV{"USERPROFILE"} || "/";
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$on_windows = 1;
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}
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# Read users file
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&read_users_file();
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# Setup SSL if possible and if requested
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if (!-r $config{'keyfile'} ||
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$config{'certfile'} && !-r $config{'certfile'}) {
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# Key file doesn't exist!
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$use_ssl = 0;
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}
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@ipkeys = &get_ipkeys(\%config);
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if ($use_ssl) {
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if ($config{'ssl_version'}) {
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# Force an SSL version
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$Net::SSLeay::version = $config{'ssl_version'};
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$Net::SSLeay::ssl_version = $config{'ssl_version'};
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}
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$client_certs = 0 if (!-r $config{'ca'} || !%certs);
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$ssl_contexts{"*"} = &create_ssl_context($config{'keyfile'},
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$config{'certfile'});
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foreach $ipkey (@ipkeys) {
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$ctx = &create_ssl_context($ipkey->{'key'}, $ipkey->{'cert'});
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foreach $ip (@{$ipkey->{'ips'}}) {
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$ssl_contexts{$ip} = $ctx;
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}
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}
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}
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# Setup syslog support if possible and if requested
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if ($use_syslog) {
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open(ERRDUP, ">&STDERR");
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open(STDERR, ">/dev/null");
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$log_socket = $config{"logsock"} || "unix";
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eval 'openlog($config{"pam"}, "cons,pid,ndelay", "authpriv"); setlogsock($log_socket)';
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if ($@) {
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$use_syslog = 0;
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}
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else {
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local $msg = ucfirst($config{'pam'})." starting";
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eval { syslog("info", "%s", $msg); };
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if ($@) {
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eval {
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setlogsock("inet");
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syslog("info", "%s", $msg);
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};
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if ($@) {
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# All attempts to use syslog have failed..
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$use_syslog = 0;
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}
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}
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}
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open(STDERR, ">&ERRDUP");
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close(ERRDUP);
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}
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# Read MIME types file and add extra types
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&read_mime_types();
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# get the time zone
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if ($config{'log'}) {
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local(@gmt, @lct, $days, $hours, $mins);
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@gmt = gmtime(time());
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@lct = localtime(time());
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$days = $lct[3] - $gmt[3];
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$hours = ($days < -1 ? 24 : 1 < $days ? -24 : $days * 24) +
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$lct[2] - $gmt[2];
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$mins = $hours * 60 + $lct[1] - $gmt[1];
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$timezone = ($mins < 0 ? "-" : "+"); $mins = abs($mins);
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$timezone .= sprintf "%2.2d%2.2d", $mins/60, $mins%60;
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}
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# Build various maps from the config files
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&build_config_mappings();
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# start up external authentication program, if needed
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if ($config{'extauth'}) {
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socketpair(EXTAUTH, EXTAUTH2, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
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if (!($extauth = fork())) {
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close(EXTAUTH);
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close(STDIN);
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close(STDOUT);
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open(STDIN, "<&EXTAUTH2");
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open(STDOUT, ">&EXTAUTH2");
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exec($config{'extauth'}) or die "exec failed : $!\n";
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}
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close(EXTAUTH2);
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local $os = select(EXTAUTH);
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$| = 1; select($os);
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}
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# Pre-load any libraries
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foreach $pl (split(/\s+/, $config{'preload'})) {
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($pkg, $lib) = split(/=/, $pl);
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$pkg =~ s/[^A-Za-z0-9]/_/g;
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eval "package $pkg; do '$config{'root'}/$lib'";
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if ($@) {
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print STDERR "Failed to pre-load $pkg/$lib : $@\n";
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}
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else {
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print STDERR "Pre-loading $pkg/$lib\n";
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}
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}
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# Open debug log if set
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if ($config{'debuglog'}) {
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open(DEBUG, ">>$config{'debuglog'}");
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chmod(0700, $config{'debuglog'});
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select(DEBUG); $| = 1; select(STDOUT);
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print DEBUG "miniserv.pl starting ..\n";
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}
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# Write out (empty) blocked hosts file
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&write_blocked_file();
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# Re-direct STDERR to a log file
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if ($config{'errorlog'} ne '-') {
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open(STDERR, ">>$config{'errorlog'}") || die "failed to open $config{'errorlog'} : $!";
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if ($config{'logperms'}) {
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chmod(oct($config{'logperms'}), $config{'errorlog'});
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}
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}
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select(STDERR); $| = 1; select(STDOUT);
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if ($config{'inetd'}) {
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# We are being run from inetd - go direct to handling the request
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$SIG{'HUP'} = 'IGNORE';
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$SIG{'TERM'} = 'DEFAULT';
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$SIG{'PIPE'} = 'DEFAULT';
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open(SOCK, "+>&STDIN");
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# Check if it is time for the logfile to be cleared
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if ($config{'logclear'}) {
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local $write_logtime = 0;
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local @st = stat("$config{'logfile'}.time");
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if (@st) {
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if ($st[9]+$config{'logtime'}*60*60 < time()){
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# need to clear log
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$write_logtime = 1;
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unlink($config{'logfile'});
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}
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}
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else { $write_logtime = 1; }
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if ($write_logtime) {
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open(LOGTIME, ">$config{'logfile'}.time");
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print LOGTIME time(),"\n";
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close(LOGTIME);
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}
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}
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# Initialize SSL for this connection
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if ($use_ssl) {
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$ssl_con = &ssl_connection_for_ip(SOCK);
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$ssl_con || exit;
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}
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# Work out the hostname for this web server
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$host = &get_socket_name(SOCK);
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$host || exit;
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$port = $config{'port'};
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$acptaddr = getpeername(SOCK);
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$acptaddr || exit;
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print DEBUG "main: Starting handle_request loop pid=$$\n";
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while(&handle_request($acptaddr, getsockname(SOCK))) { }
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print DEBUG "main: Done handle_request loop pid=$$\n";
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close(SOCK);
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exit;
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}
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# Build list of sockets to listen on
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if ($config{"bind"} && $config{"bind"} ne "*") {
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push(@sockets, [ inet_aton($config{'bind'}), $config{'port'} ]);
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}
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else {
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push(@sockets, [ INADDR_ANY, $config{'port'} ]);
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}
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foreach $s (split(/\s+/, $config{'sockets'})) {
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if ($s =~ /^(\d+)$/) {
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# Just listen on another port on the main IP
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push(@sockets, [ $sockets[0]->[0], $s ]);
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}
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elsif ($s =~ /^(\S+):(\d+)$/) {
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# Listen on a specific port and IP
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push(@sockets, [ $1 eq "*" ? INADDR_ANY : inet_aton($1), $2 ]);
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}
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elsif ($s =~ /^([0-9\.]+):\*$/ || $s =~ /^([0-9\.]+)$/) {
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# Listen on the main port on another IP
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push(@sockets, [ inet_aton($1), $sockets[0]->[1] ]);
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}
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}
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# Open all the sockets
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$proto = getprotobyname('tcp');
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@sockerrs = ( );
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$tried_inaddr_any = 0;
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for($i=0; $i<@sockets; $i++) {
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$fh = "MAIN$i";
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socket($fh, PF_INET, SOCK_STREAM, $proto) ||
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die "Failed to open socket : $!";
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setsockopt($fh, SOL_SOCKET, SO_REUSEADDR, pack("l", 1));
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for($j=0; $j<5; $j++) {
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last if (bind($fh, pack_sockaddr_in($sockets[$i]->[1],
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$sockets[$i]->[0])));
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sleep(1);
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}
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if ($j == 5) {
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# All attempts failed .. give up
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if ($sockets[$i]->[0] eq INADDR_ANY) {
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push(@sockerrs, "Failed to bind to port $sockets[$i]->[1] : $!");
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$tried_inaddr_any = 1;
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}
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else {
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$ip = inet_ntoa($sockets[$i]->[0]);
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push(@sockerrs, "Failed to bind to IP $ip port $sockets[$i]->[1] : $!");
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}
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}
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else {
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listen($fh, SOMAXCONN);
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push(@socketfhs, $fh);
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}
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}
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foreach $se (@sockerrs) {
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print STDERR $se,"\n";
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}
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# If all binds failed, try binding to any address
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if (!@socketfhs && !$tried_inaddr_any) {
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print STDERR "Falling back to listening on any address\n";
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$fh = "MAIN";
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socket($fh, PF_INET, SOCK_STREAM, $proto) ||
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die "Failed to open socket : $!";
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setsockopt($fh, SOL_SOCKET, SO_REUSEADDR, pack("l", 1));
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bind($fh, pack_sockaddr_in($sockets[0]->[1], INADDR_ANY)) ||
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die "Failed to bind to port $sockets[0]->[1] : $!";
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listen($fh, SOMAXCONN);
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push(@socketfhs, $fh);
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}
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elsif (!@socketfhs && $tried_inaddr_any) {
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die "Could not listen on any ports";
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}
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if ($config{'listen'}) {
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# Open the socket that allows other webmin servers to find this one
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$proto = getprotobyname('udp');
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if (socket(LISTEN, PF_INET, SOCK_DGRAM, $proto)) {
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setsockopt(LISTEN, SOL_SOCKET, SO_REUSEADDR, pack("l", 1));
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bind(LISTEN, pack_sockaddr_in($config{'listen'}, INADDR_ANY));
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listen(LISTEN, SOMAXCONN);
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}
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else {
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$config{'listen'} = 0;
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}
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}
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# Split from the controlling terminal, unless configured not to
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if (!$config{'nofork'}) {
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if (fork()) { exit; }
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}
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eval { setsid(); }; # may not work on Windows
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# Close standard file handles
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open(STDIN, "</dev/null");
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open(STDOUT, ">/dev/null");
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&log_error("miniserv.pl started");
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&log_error($pam_msg) if ($pam_msg);
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&log_error($pam_msg2) if ($pam_msg2);
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&log_error($utmp_msg) if ($utmp_msg);
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&log_error($crypt_msg) if ($crypt_msg);
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&log_error($sudo_msg) if ($sudo_msg);
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&log_error($rand_msg) if ($rand_msg);
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# write out the PID file
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&write_pid_file();
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# Start the log-clearing process, if needed. This checks every minute
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# to see if the log has passed its reset time, and if so clears it
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if ($config{'logclear'}) {
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if (!($logclearer = fork())) {
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&close_all_sockets();
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close(LISTEN);
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while(1) {
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local $write_logtime = 0;
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local @st = stat("$config{'logfile'}.time");
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if (@st) {
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if ($st[9]+$config{'logtime'}*60*60 < time()){
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# need to clear log
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$write_logtime = 1;
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unlink($config{'logfile'});
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}
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}
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else { $write_logtime = 1; }
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if ($write_logtime) {
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open(LOGTIME, ">$config{'logfile'}.time");
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print LOGTIME time(),"\n";
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close(LOGTIME);
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}
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sleep(5*60);
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}
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exit;
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}
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push(@childpids, $logclearer);
|
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}
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# Setup the logout time dbm if needed
|
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if ($config{'session'}) {
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eval "use SDBM_File";
|
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dbmopen(%sessiondb, $config{'sessiondb'}, 0700);
|
|
eval "\$sessiondb{'1111111111'} = 'foo bar';";
|
|
if ($@) {
|
|
dbmclose(%sessiondb);
|
|
eval "use NDBM_File";
|
|
dbmopen(%sessiondb, $config{'sessiondb'}, 0700);
|
|
}
|
|
else {
|
|
delete($sessiondb{'1111111111'});
|
|
}
|
|
}
|
|
|
|
# Run the main loop
|
|
$SIG{'HUP'} = 'miniserv::trigger_restart';
|
|
$SIG{'TERM'} = 'miniserv::term_handler';
|
|
$SIG{'USR1'} = 'miniserv::trigger_reload';
|
|
$SIG{'PIPE'} = 'IGNORE';
|
|
local $remove_session_count = 0;
|
|
$need_pipes = $config{'passdelay'} || $config{'session'};
|
|
$last_pid_time = time();
|
|
while(1) {
|
|
# wait for a new connection, or a message from a child process
|
|
local ($i, $rmask);
|
|
if (@childpids <= $config{'maxconns'}) {
|
|
# Only accept new main socket connects when ready
|
|
local $s;
|
|
foreach $s (@socketfhs) {
|
|
vec($rmask, fileno($s), 1) = 1;
|
|
}
|
|
}
|
|
else {
|
|
printf STDERR "too many children (%d > %d)\n",
|
|
scalar(@childpids), $config{'maxconns'};
|
|
}
|
|
if ($need_pipes) {
|
|
for($i=0; $i<@passin; $i++) {
|
|
vec($rmask, fileno($passin[$i]), 1) = 1;
|
|
}
|
|
}
|
|
vec($rmask, fileno(LISTEN), 1) = 1 if ($config{'listen'});
|
|
|
|
# Wait for a connection
|
|
local $sel = select($rmask, undef, undef, 10);
|
|
|
|
# Check the flag files
|
|
if ($config{'restartflag'} && -r $config{'restartflag'}) {
|
|
print STDERR "restart flag file detected\n";
|
|
unlink($config{'restartflag'});
|
|
$need_restart = 1;
|
|
}
|
|
if ($config{'reloadflag'} && -r $config{'reloadflag'}) {
|
|
unlink($config{'reloadflag'});
|
|
$need_reload = 1;
|
|
}
|
|
|
|
if ($need_restart) {
|
|
# Got a HUP signal while in select() .. restart now
|
|
&restart_miniserv();
|
|
}
|
|
if ($need_reload) {
|
|
# Got a USR1 signal while in select() .. re-read config
|
|
$need_reload = 0;
|
|
&reload_config_file();
|
|
}
|
|
local $time_now = time();
|
|
|
|
# Write the PID every 10 seconds
|
|
if ($time_now - $last_pid_time > 10) {
|
|
&write_pid_file();
|
|
$last_pid_time = $time_now;
|
|
}
|
|
|
|
# Clean up finished processes
|
|
local $pid;
|
|
do { $pid = waitpid(-1, WNOHANG);
|
|
@childpids = grep { $_ != $pid } @childpids;
|
|
} while($pid != 0 && $pid != -1);
|
|
|
|
# run the unblocking procedure to check if enough time has passed to
|
|
# unblock hosts that heve been blocked because of password failures
|
|
$unblocked = 0;
|
|
if ($config{'blockhost_failures'}) {
|
|
$i = 0;
|
|
while ($i <= $#deny) {
|
|
if ($blockhosttime{$deny[$i]} &&
|
|
$config{'blockhost_time'} != 0 &&
|
|
($time_now - $blockhosttime{$deny[$i]}) >=
|
|
$config{'blockhost_time'}) {
|
|
# the host can be unblocked now
|
|
$hostfail{$deny[$i]} = 0;
|
|
splice(@deny, $i, 1);
|
|
$unblocked = 1;
|
|
}
|
|
$i++;
|
|
}
|
|
}
|
|
|
|
# Do the same for blocked users
|
|
if ($config{'blockuser_failures'}) {
|
|
$i = 0;
|
|
while ($i <= $#deny) {
|
|
if ($blockusertime{$deny[$i]} &&
|
|
$config{'blockuser_time'} != 0 &&
|
|
($time_now - $blockusertime{$deny[$i]}) >=
|
|
$config{'blockuser_time'}) {
|
|
# the user can be unblocked now
|
|
$userfail{$deny[$i]} = 0;
|
|
splice(@denyusers, $i, 1);
|
|
$unblocked = 1;
|
|
}
|
|
$i++;
|
|
}
|
|
}
|
|
if ($unblocked) {
|
|
&write_blocked_file();
|
|
}
|
|
|
|
if ($config{'session'} && (++$remove_session_count%50) == 0) {
|
|
# Remove sessions with more than 7 days of inactivity,
|
|
local $s;
|
|
foreach $s (keys %sessiondb) {
|
|
local ($user, $ltime, $lip) = split(/\s+/, $sessiondb{$s});
|
|
if ($time_now - $ltime > 7*24*60*60) {
|
|
&run_logout_script($s, $user);
|
|
&write_logout_utmp($user, $lip);
|
|
delete($sessiondb{$s});
|
|
if ($use_syslog) {
|
|
syslog("info", "%s",
|
|
"Timeout of session for $user");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($use_pam && $config{'pam_conv'}) {
|
|
# Remove PAM sessions with more than 5 minutes of inactivity
|
|
local $c;
|
|
foreach $c (values %conversations) {
|
|
if ($time_now - $c->{'time'} > 5*60) {
|
|
&end_pam_conversation($c);
|
|
if ($use_syslog) {
|
|
syslog("info", "%s", "Timeout of PAM ".
|
|
"session for $c->{'user'}");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Don't check any sockets if there is no activity
|
|
next if ($sel <= 0);
|
|
|
|
# Check if any of the main sockets have received a new connection
|
|
local $sn = 0;
|
|
foreach $s (@socketfhs) {
|
|
if (vec($rmask, fileno($s), 1)) {
|
|
# got new connection
|
|
$acptaddr = accept(SOCK, $s);
|
|
if (!$acptaddr) { next; }
|
|
binmode(SOCK); # turn off any Perl IO stuff
|
|
|
|
# create pipes
|
|
local ($PASSINr, $PASSINw, $PASSOUTr, $PASSOUTw);
|
|
if ($need_pipes) {
|
|
($PASSINr, $PASSINw, $PASSOUTr, $PASSOUTw) =
|
|
&allocate_pipes();
|
|
}
|
|
|
|
# Check username of connecting user
|
|
local ($peerp, $peera) = unpack_sockaddr_in($acptaddr);
|
|
$localauth_user = undef;
|
|
if ($config{'localauth'} && inet_ntoa($peera) eq "127.0.0.1") {
|
|
if (open(TCP, "/proc/net/tcp")) {
|
|
# Get the info direct from the kernel
|
|
while(<TCP>) {
|
|
s/^\s+//;
|
|
local @t = split(/[\s:]+/, $_);
|
|
if ($t[1] eq '0100007F' &&
|
|
$t[2] eq sprintf("%4.4X", $peerp)) {
|
|
$localauth_user = getpwuid($t[11]);
|
|
last;
|
|
}
|
|
}
|
|
close(TCP);
|
|
}
|
|
else {
|
|
# Call lsof for the info
|
|
local $lsofpid = open(LSOF,
|
|
"$config{'localauth'} -i TCP\@127.0.0.1:$peerp |");
|
|
while(<LSOF>) {
|
|
if (/^(\S+)\s+(\d+)\s+(\S+)/ &&
|
|
$2 != $$ && $2 != $lsofpid) {
|
|
$localauth_user = $3;
|
|
}
|
|
}
|
|
close(LSOF);
|
|
}
|
|
}
|
|
|
|
# Work out the hostname for this web server
|
|
$host = &get_socket_name(SOCK);
|
|
if (!$host) {
|
|
print STDERR "Failed to get local socket name : $!\n";
|
|
close(SOCK);
|
|
next;
|
|
}
|
|
$port = $sockets[$sn]->[1];
|
|
|
|
# fork the subprocess
|
|
local $handpid;
|
|
if (!($handpid = fork())) {
|
|
# setup signal handlers
|
|
$SIG{'TERM'} = 'DEFAULT';
|
|
$SIG{'PIPE'} = 'DEFAULT';
|
|
#$SIG{'CHLD'} = 'IGNORE';
|
|
$SIG{'HUP'} = 'IGNORE';
|
|
$SIG{'USR1'} = 'IGNORE';
|
|
|
|
# Initialize SSL for this connection
|
|
if ($use_ssl) {
|
|
$ssl_con = &ssl_connection_for_ip(SOCK);
|
|
$ssl_con || exit;
|
|
}
|
|
|
|
# Close the file handle for the session DBM
|
|
dbmclose(%sessiondb);
|
|
|
|
# close useless pipes
|
|
if ($need_pipes) {
|
|
&close_all_pipes();
|
|
close($PASSINr); close($PASSOUTw);
|
|
}
|
|
&close_all_sockets();
|
|
close(LISTEN);
|
|
|
|
print DEBUG
|
|
"main: Starting handle_request loop pid=$$\n";
|
|
while(&handle_request($acptaddr,
|
|
getsockname(SOCK))) { }
|
|
print DEBUG
|
|
"main: Done handle_request loop pid=$$\n";
|
|
shutdown(SOCK, 1);
|
|
close(SOCK);
|
|
close($PASSINw); close($PASSOUTw);
|
|
exit;
|
|
}
|
|
push(@childpids, $handpid);
|
|
if ($need_pipes) {
|
|
close($PASSINw); close($PASSOUTr);
|
|
push(@passin, $PASSINr);
|
|
push(@passout, $PASSOUTw);
|
|
}
|
|
close(SOCK);
|
|
}
|
|
$sn++;
|
|
}
|
|
|
|
if ($config{'listen'} && vec($rmask, fileno(LISTEN), 1)) {
|
|
# Got UDP packet from another webmin server
|
|
local $rcvbuf;
|
|
local $from = recv(LISTEN, $rcvbuf, 1024, 0);
|
|
next if (!$from);
|
|
local $fromip = inet_ntoa((unpack_sockaddr_in($from))[1]);
|
|
local $toip = inet_ntoa((unpack_sockaddr_in(
|
|
getsockname(LISTEN)))[1]);
|
|
if ((!@deny || !&ip_match($fromip, $toip, @deny)) &&
|
|
(!@allow || &ip_match($fromip, $toip, @allow))) {
|
|
local $listenhost = &get_socket_name(LISTEN);
|
|
send(LISTEN, "$listenhost:$config{'port'}:".
|
|
($use_ssl || $config{'inetd_ssl'} ? 1 : 0).":".
|
|
($config{'listenhost'} ?
|
|
&get_system_hostname() : ""),
|
|
0, $from)
|
|
if ($listenhost);
|
|
}
|
|
}
|
|
|
|
# check for session, password-timeout and PAM messages from subprocesses
|
|
for($i=0; $i<@passin; $i++) {
|
|
if (vec($rmask, fileno($passin[$i]), 1)) {
|
|
# this sub-process is asking about a password
|
|
local $infd = $passin[$i];
|
|
local $outfd = $passout[$i];
|
|
#local $inline = <$infd>;
|
|
local $inline = &sysread_line($infd);
|
|
if ($inline) {
|
|
print DEBUG "main: inline $inline";
|
|
}
|
|
else {
|
|
print DEBUG "main: inline EOF\n";
|
|
}
|
|
if ($inline =~ /^delay\s+(\S+)\s+(\S+)\s+(\d+)/) {
|
|
# Got a delay request from a subprocess.. for
|
|
# valid logins, there is no delay (to prevent
|
|
# denial of service attacks), but for invalid
|
|
# logins the delay increases with each failed
|
|
# attempt.
|
|
if ($3) {
|
|
# login OK.. no delay
|
|
print $outfd "0 0\n";
|
|
$wasblocked = $hostfail{$2} ||
|
|
$userfail{$1};
|
|
$hostfail{$2} = 0;
|
|
$userfail{$1} = 0;
|
|
if ($wasblocked) {
|
|
&write_blocked_file();
|
|
}
|
|
}
|
|
else {
|
|
# login failed..
|
|
$hostfail{$2}++;
|
|
$userfail{$1}++;
|
|
$blocked = 0;
|
|
|
|
# add the host to the block list,
|
|
# if configured
|
|
if ($config{'blockhost_failures'} &&
|
|
$hostfail{$2} >=
|
|
$config{'blockhost_failures'}) {
|
|
push(@deny, $2);
|
|
$blockhosttime{$2} = $time_now;
|
|
$blocked = 1;
|
|
if ($use_syslog) {
|
|
local $logtext = "Security alert: Host $2 blocked after $config{'blockhost_failures'} failed logins for user $1";
|
|
syslog("crit", "%s",
|
|
$logtext);
|
|
}
|
|
}
|
|
|
|
# add the user to the user block list,
|
|
# if configured
|
|
if ($config{'blockuser_failures'} &&
|
|
$userfail{$1} >=
|
|
$config{'blockuser_failures'}) {
|
|
push(@denyusers, $1);
|
|
$blockusertime{$1} = $time_now;
|
|
$blocked = 2;
|
|
if ($use_syslog) {
|
|
local $logtext = "Security alert: User $1 blocked after $config{'blockuser_failures'} failed logins";
|
|
syslog("crit", "%s",
|
|
$logtext);
|
|
}
|
|
}
|
|
|
|
# Send back a delay
|
|
$dl = $userdlay{$1} -
|
|
int(($time_now - $userlast{$1})/50);
|
|
$dl = $dl < 0 ? 0 : $dl+1;
|
|
print $outfd "$dl $blocked\n";
|
|
$userdlay{$1} = $dl;
|
|
|
|
# Write out blocked status file
|
|
if ($blocked) {
|
|
&write_blocked_file();
|
|
}
|
|
}
|
|
$userlast{$1} = $time_now;
|
|
}
|
|
elsif ($inline =~ /^verify\s+(\S+)\s+(\S+)/) {
|
|
# Verifying a session ID
|
|
local $session_id = $1;
|
|
local $notimeout = $2;
|
|
if (!defined($sessiondb{$session_id})) {
|
|
# Session doesn't exist
|
|
print $outfd "0 0\n";
|
|
}
|
|
else {
|
|
local ($user, $ltime) =
|
|
split(/\s+/, $sessiondb{$session_id});
|
|
local $lot = &get_logout_time($user, $session_id);
|
|
if ($lot &&
|
|
$time_now - $ltime > $lot*60 &&
|
|
!$notimeout) {
|
|
# Session has timed out
|
|
print $outfd "1 ",$time_now - $ltime,"\n";
|
|
#delete($sessiondb{$session_id});
|
|
}
|
|
else {
|
|
# Session is OK
|
|
print $outfd "2 $user\n";
|
|
if ($lot &&
|
|
$time_now - $ltime >
|
|
($lot*60)/2) {
|
|
$sessiondb{$session_id} = "$user $time_now";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
elsif ($inline =~ /^new\s+(\S+)\s+(\S+)\s+(\S+)/) {
|
|
# Creating a new session
|
|
$sessiondb{$1} = "$2 $time_now $3";
|
|
}
|
|
elsif ($inline =~ /^delete\s+(\S+)/) {
|
|
# Logging out a session
|
|
local $sid = $1;
|
|
local @sdb = split(/\s+/, $sessiondb{$sid});
|
|
print $outfd $sdb[0],"\n";
|
|
delete($sessiondb{$sid});
|
|
}
|
|
elsif ($inline =~ /^pamstart\s+(\S+)\s+(\S+)\s+(.*)/) {
|
|
# Starting a new PAM conversation
|
|
local ($cid, $host, $user) = ($1, $2, $3);
|
|
|
|
# Does this user even need PAM?
|
|
local ($realuser, $canlogin) =
|
|
&can_user_login($user, undef, $host);
|
|
local $conv;
|
|
if ($canlogin == 0) {
|
|
# Cannot even login!
|
|
print $outfd "0 Invalid username\n";
|
|
}
|
|
elsif ($canlogin != 2) {
|
|
# Not using PAM .. so just ask for
|
|
# the password.
|
|
$conv = { 'user' => $realuser,
|
|
'host' => $host,
|
|
'step' => 0,
|
|
'cid' => $cid,
|
|
'time' => time() };
|
|
print $outfd "3 Password\n";
|
|
}
|
|
else {
|
|
# Start the PAM conversation
|
|
# sub-process, and get a question
|
|
$conv = { 'user' => $realuser,
|
|
'host' => $host,
|
|
'cid' => $cid,
|
|
'time' => time() };
|
|
local ($PAMINr, $PAMINw, $PAMOUTr,
|
|
$PAMOUTw) = &allocate_pipes();
|
|
local $pampid = fork();
|
|
if (!$pampid) {
|
|
close($PAMOUTr); close($PAMINw);
|
|
&pam_conversation_process(
|
|
$realuser,
|
|
$PAMOUTw, $PAMINr);
|
|
}
|
|
close($PAMOUTw); close($PAMINr);
|
|
$conv->{'pid'} = $pampid;
|
|
$conv->{'PAMOUTr'} = $PAMOUTr;
|
|
$conv->{'PAMINw'} = $PAMINw;
|
|
push(@childpids, $pampid);
|
|
|
|
# Get the first PAM question
|
|
local $pok = &recv_pam_question(
|
|
$conv, $outfd);
|
|
if (!$pok) {
|
|
&end_pam_conversation($conv);
|
|
}
|
|
}
|
|
|
|
$conversations{$cid} = $conv if ($conv);
|
|
}
|
|
elsif ($inline =~ /^pamanswer\s+(\S+)\s+(.*)/) {
|
|
# A response to a PAM question
|
|
local ($cid, $answer) = ($1, $2);
|
|
local $conv = $conversations{$cid};
|
|
if (!$conv) {
|
|
# No such conversation?
|
|
print $outfd "0 Bad login session\n";
|
|
}
|
|
elsif ($conv->{'pid'}) {
|
|
# Send the PAM response and get
|
|
# the next question
|
|
&send_pam_answer($conv, $answer);
|
|
local $pok = &recv_pam_question($conv, $outfd);
|
|
if (!$pok) {
|
|
&end_pam_conversation($conv);
|
|
}
|
|
}
|
|
else {
|
|
# This must be the password .. try it
|
|
# and send back the results
|
|
local ($vu, $expired, $nonexist) =
|
|
&validate_user($conv->{'user'},
|
|
$answer,
|
|
$conf->{'host'});
|
|
local $ok = $vu ? 1 : 0;
|
|
print $outfd "2 $conv->{'user'} $ok $expired $notexist\n";
|
|
&end_pam_conversation($conv);
|
|
}
|
|
}
|
|
elsif ($inline =~ /^writesudo\s+(\S+)\s+(\d+)/) {
|
|
# Store the fact that some user can sudo to root
|
|
local ($user, $ok) = ($1, $2);
|
|
$sudocache{$user} = $ok." ".time();
|
|
}
|
|
elsif ($inline =~ /^readsudo\s+(\S+)/) {
|
|
# Query the user sudo cache (valid for 1 minute)
|
|
local $user = $1;
|
|
local ($ok, $last) =
|
|
split(/\s+/, $sudocache{$user});
|
|
if ($last < time()-60) {
|
|
# Cache too old
|
|
print $outfd "2\n";
|
|
}
|
|
else {
|
|
# Tell client OK or not
|
|
print $outfd "$ok\n";
|
|
}
|
|
}
|
|
elsif ($inline =~ /\S/) {
|
|
# Unknown line from pipe?
|
|
print DEBUG "main: Unknown line from pipe $inline\n";
|
|
print STDERR "Unknown line from pipe $inline\n";
|
|
}
|
|
else {
|
|
# close pipe
|
|
close($infd); close($outfd);
|
|
$passin[$i] = $passout[$i] = undef;
|
|
}
|
|
}
|
|
}
|
|
@passin = grep { defined($_) } @passin;
|
|
@passout = grep { defined($_) } @passout;
|
|
}
|
|
|
|
# handle_request(remoteaddress, localaddress)
|
|
# Where the real work is done
|
|
sub handle_request
|
|
{
|
|
$acptip = inet_ntoa((unpack_sockaddr_in($_[0]))[1]);
|
|
$localip = $_[1] ? inet_ntoa((unpack_sockaddr_in($_[1]))[1]) : undef;
|
|
print DEBUG "handle_request: from $acptip to $localip\n";
|
|
if ($config{'loghost'}) {
|
|
$acpthost = gethostbyaddr(inet_aton($acptip), AF_INET);
|
|
$acpthost = $acptip if (!$acpthost);
|
|
}
|
|
else {
|
|
$acpthost = $acptip;
|
|
}
|
|
$datestr = &http_date(time());
|
|
$ok_code = 200;
|
|
$ok_message = "Document follows";
|
|
$logged_code = undef;
|
|
$reqline = $request_uri = $page = undef;
|
|
$authuser = undef;
|
|
$validated = undef;
|
|
|
|
# check address against access list
|
|
if (@deny && &ip_match($acptip, $localip, @deny) ||
|
|
@allow && !&ip_match($acptip, $localip, @allow)) {
|
|
&http_error(403, "Access denied for $acptip");
|
|
return 0;
|
|
}
|
|
|
|
if ($use_libwrap) {
|
|
# Check address with TCP-wrappers
|
|
if (!hosts_ctl($config{'pam'}, STRING_UNKNOWN,
|
|
$acptip, STRING_UNKNOWN)) {
|
|
&http_error(403, "Access denied for $acptip");
|
|
return 0;
|
|
}
|
|
}
|
|
print DEBUG "handle_request: passed IP checks\n";
|
|
|
|
# Compute a timeout for the start of headers, based on the number of
|
|
# child processes. As this increases, we use a shorter timeout to avoid
|
|
# an attacker overloading the system.
|
|
local $header_timeout = 60 + ($config{'maxconns'} - @childpids) * 10;
|
|
|
|
# Wait at most 60 secs for start of headers for initial requests, or
|
|
# 10 minutes for kept-alive connections
|
|
local $rmask;
|
|
vec($rmask, fileno(SOCK), 1) = 1;
|
|
local $to = $checked_timeout ? 10*60 : $header_timeout;
|
|
local $sel = select($rmask, undef, undef, $to);
|
|
if (!$sel) {
|
|
if ($checked_timeout) {
|
|
print DEBUG "handle_request: exiting due to timeout of $to\n";
|
|
exit;
|
|
}
|
|
else {
|
|
&http_error(400, "Timeout",
|
|
"Waited for that $to seconds for start of headers");
|
|
}
|
|
}
|
|
$checked_timeout++;
|
|
print DEBUG "handle_request: passed timeout check\n";
|
|
|
|
# Read the HTTP request and headers
|
|
local $origreqline = &read_line();
|
|
($reqline = $origreqline) =~ s/\r|\n//g;
|
|
$method = $page = $request_uri = undef;
|
|
print DEBUG "handle_request reqline=$reqline\n";
|
|
if (!$reqline && (!$use_ssl || $checked_timeout > 1)) {
|
|
# An empty request .. just close the connection
|
|
print DEBUG "handle_request: rejecting empty request\n";
|
|
return 0;
|
|
}
|
|
elsif ($reqline !~ /^(\S+)\s+(.*)\s+HTTP\/1\..$/) {
|
|
print DEBUG "handle_request: invalid reqline=$reqline\n";
|
|
if ($use_ssl) {
|
|
# This could be an http request when it should be https
|
|
$use_ssl = 0;
|
|
local $url = $config{'musthost'} ?
|
|
"https://$config{'musthost'}:$port/" :
|
|
"https://$host:$port/";
|
|
if ($config{'ssl_redirect'}) {
|
|
# Just re-direct to the correct URL
|
|
sleep(1); # Give browser a change to finish
|
|
# sending its request
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_data("Location: $url\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
return 0;
|
|
}
|
|
else {
|
|
# Tell user the correct URL
|
|
&http_error(200, "Bad Request", "This web server is running in SSL mode. Try the URL <a href='$url'>$url</a> instead.<br>");
|
|
}
|
|
}
|
|
elsif (ord(substr($reqline, 0, 1)) == 128 && !$use_ssl) {
|
|
# This could be an https request when it should be http ..
|
|
# need to fake a HTTP response
|
|
eval <<'EOF';
|
|
use Net::SSLeay;
|
|
eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
|
|
eval "Net::SSLeay::load_error_strings()";
|
|
$ssl_ctx = Net::SSLeay::CTX_new();
|
|
Net::SSLeay::CTX_use_RSAPrivateKey_file(
|
|
$ssl_ctx, $config{'keyfile'},
|
|
&Net::SSLeay::FILETYPE_PEM);
|
|
Net::SSLeay::CTX_use_certificate_file(
|
|
$ssl_ctx,
|
|
$config{'certfile'} || $config{'keyfile'},
|
|
&Net::SSLeay::FILETYPE_PEM);
|
|
$ssl_con = Net::SSLeay::new($ssl_ctx);
|
|
pipe(SSLr, SSLw);
|
|
if (!fork()) {
|
|
close(SSLr);
|
|
select(SSLw); $| = 1; select(STDOUT);
|
|
print SSLw $origreqline;
|
|
local $buf;
|
|
while(sysread(SOCK, $buf, 1) > 0) {
|
|
print SSLw $buf;
|
|
}
|
|
close(SOCK);
|
|
exit;
|
|
}
|
|
close(SSLw);
|
|
Net::SSLeay::set_wfd($ssl_con, fileno(SOCK));
|
|
Net::SSLeay::set_rfd($ssl_con, fileno(SSLr));
|
|
Net::SSLeay::accept($ssl_con) || die "accept() failed";
|
|
$use_ssl = 1;
|
|
local $url = $config{'musthost'} ?
|
|
"https://$config{'musthost'}:$port/" :
|
|
"https://$host:$port/";
|
|
if ($config{'ssl_redirect'}) {
|
|
# Just re-direct to the correct URL
|
|
sleep(1); # Give browser a change to
|
|
# finish sending its request
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_data("Location: $url\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
return 0;
|
|
}
|
|
else {
|
|
# Tell user the correct URL
|
|
&http_error(200, "Bad Request", "This web server is not running in SSL mode. Try the URL <a href='$url'>$url</a> instead.<br>");
|
|
}
|
|
EOF
|
|
if ($@) {
|
|
&http_error(400, "Bad Request");
|
|
}
|
|
}
|
|
else {
|
|
&http_error(400, "Bad Request");
|
|
}
|
|
}
|
|
$method = $1;
|
|
$request_uri = $page = $2;
|
|
%header = ();
|
|
local $lastheader;
|
|
while(1) {
|
|
($headline = &read_line()) =~ s/\r|\n//g;
|
|
last if ($headline eq "");
|
|
print DEBUG "handle_request: got headline $headline\n";
|
|
if ($headline =~ /^(\S+):\s*(.*)$/) {
|
|
$header{$lastheader = lc($1)} = $2;
|
|
}
|
|
elsif ($headline =~ /^\s+(.*)$/) {
|
|
$header{$lastheader} .= $headline;
|
|
}
|
|
else {
|
|
&http_error(400, "Bad Header $headline");
|
|
}
|
|
}
|
|
if (defined($header{'host'})) {
|
|
if ($header{'host'} =~ /^([^:]+):([0-9]+)$/) {
|
|
($host, $port) = ($1, $2);
|
|
}
|
|
else {
|
|
$host = $header{'host'};
|
|
}
|
|
if ($config{'musthost'} && $host ne $config{'musthost'}) {
|
|
# Disallowed hostname used
|
|
&http_error(400, "Invalid HTTP hostname");
|
|
}
|
|
}
|
|
undef(%in);
|
|
if ($page =~ /^([^\?]+)\?(.*)$/) {
|
|
# There is some query string information
|
|
$page = $1;
|
|
$querystring = $2;
|
|
print DEBUG "handle_request: querystring=$querystring\n";
|
|
if ($querystring !~ /=/) {
|
|
$queryargs = $querystring;
|
|
$queryargs =~ s/\+/ /g;
|
|
$queryargs =~ s/%(..)/pack("c",hex($1))/ge;
|
|
$querystring = "";
|
|
}
|
|
else {
|
|
# Parse query-string parameters
|
|
local @in = split(/\&/, $querystring);
|
|
foreach $i (@in) {
|
|
local ($k, $v) = split(/=/, $i, 2);
|
|
$k =~ s/\+/ /g; $k =~ s/%(..)/pack("c",hex($1))/ge;
|
|
$v =~ s/\+/ /g; $v =~ s/%(..)/pack("c",hex($1))/ge;
|
|
$in{$k} = $v;
|
|
}
|
|
}
|
|
}
|
|
$posted_data = undef;
|
|
if ($method eq 'POST' &&
|
|
$header{'content-type'} eq 'application/x-www-form-urlencoded') {
|
|
# Read in posted query string information, up the configured maximum
|
|
# post request length
|
|
$clen = $header{"content-length"};
|
|
$clen_read = $clen > $config{'max_post'} ? $config{'max_post'} : $clen;
|
|
while(length($posted_data) < $clen_read) {
|
|
$buf = &read_data($clen_read - length($posted_data));
|
|
if (!length($buf)) {
|
|
&http_error(500, "Failed to read POST request");
|
|
}
|
|
chomp($posted_data);
|
|
$posted_data =~ s/\015$//mg;
|
|
$posted_data .= $buf;
|
|
}
|
|
print DEBUG "clen_read=$clen_read clen=$clen posted_data=",length($posted_data),"\n";
|
|
if ($clen_read != $clen && length($posted_data) > $clen) {
|
|
# If the client sent more data than we asked for, chop the
|
|
# rest off
|
|
$posted_data = substr($posted_data, 0, $clen);
|
|
}
|
|
if ($header{'user-agent'} =~ /MSIE/ &&
|
|
$header{'user-agent'} !~ /Opera/i) {
|
|
# MSIE includes an extra newline in the data
|
|
$posted_data =~ s/\r|\n//g;
|
|
}
|
|
local @in = split(/\&/, $posted_data);
|
|
foreach $i (@in) {
|
|
local ($k, $v) = split(/=/, $i, 2);
|
|
#$v =~ s/\r|\n//g;
|
|
$k =~ s/\+/ /g; $k =~ s/%(..)/pack("c",hex($1))/ge;
|
|
$v =~ s/\+/ /g; $v =~ s/%(..)/pack("c",hex($1))/ge;
|
|
$in{$k} = $v;
|
|
}
|
|
print DEBUG "handle_request: posted_data=$posted_data\n";
|
|
}
|
|
|
|
# replace %XX sequences in page
|
|
$page =~ s/%(..)/pack("c",hex($1))/ge;
|
|
|
|
# Check if the browser's user agent indicates a mobile device
|
|
$mobile_device = &is_mobile_useragent($header{'user-agent'});
|
|
|
|
# Check if Host: header is for a mobile URL
|
|
foreach my $m (@mobile_prefixes) {
|
|
if ($header{'host'} =~ /^\Q$m\E/i) {
|
|
$mobile_device = 1;
|
|
}
|
|
}
|
|
|
|
# check for the logout flag file, and if existant deny authentication
|
|
if ($config{'logout'} && -r $config{'logout'}.$in{'miniserv_logout_id'}) {
|
|
print DEBUG "handle_request: logout flag set\n";
|
|
$deny_authentication++;
|
|
open(LOGOUT, $config{'logout'}.$in{'miniserv_logout_id'});
|
|
chop($count = <LOGOUT>);
|
|
close(LOGOUT);
|
|
$count--;
|
|
if ($count > 0) {
|
|
open(LOGOUT, ">$config{'logout'}$in{'miniserv_logout_id'}");
|
|
print LOGOUT "$count\n";
|
|
close(LOGOUT);
|
|
}
|
|
else {
|
|
unlink($config{'logout'}.$in{'miniserv_logout_id'});
|
|
}
|
|
}
|
|
|
|
# check for any redirect for the requested URL
|
|
foreach my $pfx (@strip_prefix) {
|
|
my $l = length($pfx);
|
|
if(length($page) >= $l &&
|
|
substr($page,0,$l) eq $pfx) {
|
|
$page=substr($page,$l);
|
|
last;
|
|
}
|
|
}
|
|
$simple = &simplify_path($page, $bogus);
|
|
$rpath = $simple;
|
|
$rpath .= "&".$querystring if (defined($querystring));
|
|
$redir = $redirect{$rpath};
|
|
if (defined($redir)) {
|
|
print DEBUG "handle_request: redir=$redir\n";
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
local $ssl = $use_ssl || $config{'inetd_ssl'};
|
|
$portstr = $port == 80 && !$ssl ? "" :
|
|
$port == 443 && $ssl ? "" : ":$port";
|
|
$prot = $ssl ? "https" : "http";
|
|
&write_data("Location: $prot://$host$portstr$redir\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
return 0;
|
|
}
|
|
|
|
# Check for a DAV request
|
|
$davpath = undef;
|
|
foreach my $d (@davpaths) {
|
|
if ($simple eq $d || $simple =~ /^\Q$d\E\//) {
|
|
$davpath = $d;
|
|
last;
|
|
}
|
|
}
|
|
if (!$davpath && ($method eq "SEARCH" || $method eq "PUT")) {
|
|
&http_error(400, "Bad Request method $method");
|
|
}
|
|
|
|
# Check for password if needed
|
|
if (%users) {
|
|
print DEBUG "handle_request: Need authentication\n";
|
|
$validated = 0;
|
|
$blocked = 0;
|
|
|
|
# Session authentication is never used for connections by
|
|
# another webmin server, or for specified pages, or for DAV, or XMLRPC,
|
|
# or mobile browsers if requested.
|
|
if ($header{'user-agent'} =~ /webmin/i ||
|
|
$header{'user-agent'} =~ /$config{'agents_nosession'}/i ||
|
|
$sessiononly{$simple} || $davpath ||
|
|
$simple eq "/xmlrpc.cgi" ||
|
|
$acptip eq $config{'host_nosession'} ||
|
|
$mobile_device && $config{'mobile_nosession'}) {
|
|
print DEBUG "handle_request: Forcing HTTP authentication\n";
|
|
$config{'session'} = 0;
|
|
}
|
|
|
|
# check for SSL authentication
|
|
if ($use_ssl && $verified_client) {
|
|
$peername = Net::SSLeay::X509_NAME_oneline(
|
|
Net::SSLeay::X509_get_subject_name(
|
|
Net::SSLeay::get_peer_certificate(
|
|
$ssl_con)));
|
|
local $peername2 = $peername;
|
|
$peername2 =~ s/Email=/emailAddress=/ ||
|
|
$peername2 =~ s/emailAddress=/Email=/;
|
|
foreach $u (keys %certs) {
|
|
if ($certs{$u} eq $peername ||
|
|
$certs{$u} eq $peername2) {
|
|
$authuser = $u;
|
|
$validated = 2;
|
|
#syslog("info", "%s", "SSL login as $authuser from $acpthost") if ($use_syslog);
|
|
last;
|
|
}
|
|
}
|
|
if ($use_syslog && !$validated) {
|
|
syslog("crit", "%s",
|
|
"Unknown SSL certificate $peername");
|
|
}
|
|
}
|
|
|
|
if (!$validated && !$deny_authentication) {
|
|
# check for IP-based authentication
|
|
local $a;
|
|
foreach $a (keys %ipaccess) {
|
|
if ($acptip eq $a) {
|
|
# It does! Auth as the user
|
|
$validated = 3;
|
|
$baseauthuser = $authuser =
|
|
$ipaccess{$a};
|
|
}
|
|
}
|
|
}
|
|
|
|
# Check for normal HTTP authentication
|
|
if (!$validated && !$deny_authentication && !$config{'session'} &&
|
|
$header{authorization} =~ /^basic\s+(\S+)$/i) {
|
|
# authorization given..
|
|
($authuser, $authpass) = split(/:/, &b64decode($1), 2);
|
|
print DEBUG "handle_request: doing basic auth check authuser=$authuser authpass=$authpass\n";
|
|
local ($vu, $expired, $nonexist) =
|
|
&validate_user($authuser, $authpass, $host);
|
|
print DEBUG "handle_request: vu=$vu expired=$expired nonexist=$nonexist\n";
|
|
if ($vu && (!$expired || $config{'passwd_mode'} == 1)) {
|
|
$authuser = $vu;
|
|
$validated = 1;
|
|
}
|
|
else {
|
|
$validated = 0;
|
|
}
|
|
if ($use_syslog && !$validated) {
|
|
syslog("crit", "%s",
|
|
($nonexist ? "Non-existent" :
|
|
$expired ? "Expired" : "Invalid").
|
|
" login as $authuser from $acpthost");
|
|
}
|
|
if ($authuser =~ /\r|\n|\s/) {
|
|
&http_error(500, "Invalid username",
|
|
"Username contains invalid characters");
|
|
}
|
|
if ($authpass =~ /\r|\n/) {
|
|
&http_error(500, "Invalid password",
|
|
"Password contains invalid characters");
|
|
}
|
|
|
|
if ($config{'passdelay'} && !$config{'inetd'}) {
|
|
# check with main process for delay
|
|
print DEBUG "handle_request: about to ask for password delay\n";
|
|
print $PASSINw "delay $authuser $acptip $validated\n";
|
|
<$PASSOUTr> =~ /(\d+) (\d+)/;
|
|
$blocked = $2;
|
|
print DEBUG "handle_request: password delay $1 $2\n";
|
|
sleep($1);
|
|
}
|
|
}
|
|
|
|
# Check for a visit to the special session login page
|
|
if ($config{'session'} && !$deny_authentication &&
|
|
$page eq $config{'session_login'}) {
|
|
if ($in{'logout'} && $header{'cookie'} =~ /(^|\s)$sidname=([a-f0-9]+)/) {
|
|
# Logout clicked .. remove the session
|
|
local $sid = $2;
|
|
print $PASSINw "delete $sid\n";
|
|
local $louser = <$PASSOUTr>;
|
|
chop($louser);
|
|
$logout = 1;
|
|
$already_session_id = undef;
|
|
$authuser = $baseauthuser = undef;
|
|
if ($louser) {
|
|
if ($use_syslog) {
|
|
syslog("info", "%s", "Logout by $louser from $acpthost");
|
|
}
|
|
&run_logout_script($louser, $sid,
|
|
$acptip, $localip);
|
|
&write_logout_utmp($louser, $actphost);
|
|
}
|
|
}
|
|
else {
|
|
# Validate the user
|
|
if ($in{'user'} =~ /\r|\n|\s/) {
|
|
&http_error(500, "Invalid username",
|
|
"Username contains invalid characters");
|
|
}
|
|
if ($in{'pass'} =~ /\r|\n/) {
|
|
&http_error(500, "Invalid password",
|
|
"Password contains invalid characters");
|
|
}
|
|
|
|
local ($vu, $expired, $nonexist) =
|
|
&validate_user($in{'user'}, $in{'pass'}, $host);
|
|
local $hrv = &handle_login(
|
|
$vu || $in{'user'}, $vu ? 1 : 0,
|
|
$expired, $nonexist, $in{'pass'});
|
|
return $hrv if (defined($hrv));
|
|
}
|
|
}
|
|
|
|
# Check for a visit to the special PAM login page
|
|
if ($config{'session'} && !$deny_authentication &&
|
|
$use_pam && $config{'pam_conv'} && $page eq $config{'pam_login'} &&
|
|
!$in{'restart'}) {
|
|
# A question has been entered .. submit it to the main process
|
|
print DEBUG "handle_request: Got call to $page ($in{'cid'})\n";
|
|
print DEBUG "handle_request: For PAM, authuser=$authuser\n";
|
|
if ($in{'answer'} =~ /\r|\n/ || $in{'cid'} =~ /\r|\n|\s/) {
|
|
&http_error(500, "Invalid response",
|
|
"Response contains invalid characters");
|
|
}
|
|
|
|
if (!$in{'cid'}) {
|
|
# Start of a new conversation - answer must be username
|
|
$cid = &generate_random_id($in{'answer'});
|
|
print $PASSINw "pamstart $cid $host $in{'answer'}\n";
|
|
}
|
|
else {
|
|
# A response to a previous question
|
|
$cid = $in{'cid'};
|
|
print $PASSINw "pamanswer $cid $in{'answer'}\n";
|
|
}
|
|
|
|
# Read back the response, and the next question (if any)
|
|
local $line = <$PASSOUTr>;
|
|
$line =~ s/\r|\n//g;
|
|
local ($rv, $question) = split(/\s+/, $line, 2);
|
|
if ($rv == 0) {
|
|
# Cannot login!
|
|
local $hrv = &handle_login(
|
|
$in{'answer'} || "unknown", 0, 0, 1, undef);
|
|
return $hrv if (defined($hrv));
|
|
}
|
|
elsif ($rv == 1 || $rv == 3) {
|
|
# Another question .. force use of PAM CGI
|
|
$validated = 1;
|
|
$method = "GET";
|
|
$querystring .= "&cid=$cid&question=".
|
|
&urlize($question);
|
|
$querystring .= "&password=1" if ($rv == 3);
|
|
$queryargs = "";
|
|
$page = $config{'pam_login'};
|
|
$miniserv_internal = 1;
|
|
$logged_code = 401;
|
|
}
|
|
elsif ($rv == 2) {
|
|
# Got back a final ok or failure
|
|
local ($user, $ok, $expired, $nonexist) =
|
|
split(/\s+/, $question);
|
|
local $hrv = &handle_login(
|
|
$user, $ok, $expired, $nonexist, undef);
|
|
return $hrv if (defined($hrv));
|
|
}
|
|
elsif ($rv == 4) {
|
|
# A message from PAM .. tell the user
|
|
$validated = 1;
|
|
$method = "GET";
|
|
$querystring .= "&cid=$cid&message=".
|
|
&urlize($question);
|
|
$queryargs = "";
|
|
$page = $config{'pam_login'};
|
|
$miniserv_internal = 1;
|
|
$logged_code = 401;
|
|
}
|
|
}
|
|
|
|
# Check for a visit to the special password change page
|
|
if ($config{'session'} && !$deny_authentication &&
|
|
$page eq $config{'password_change'} && !$validated &&
|
|
$config{'passwd_mode'} == 2) {
|
|
# Just let this slide ..
|
|
$validated = 1;
|
|
$miniserv_internal = 3;
|
|
}
|
|
|
|
# Check for an existing session
|
|
if ($config{'session'} && !$validated) {
|
|
if ($already_session_id) {
|
|
$session_id = $already_session_id;
|
|
$authuser = $already_authuser;
|
|
$validated = 1;
|
|
}
|
|
elsif (!$deny_authentication &&
|
|
$header{'cookie'} =~ /(^|\s)$sidname=([a-f0-9]+)/) {
|
|
$session_id = $2;
|
|
local $notimeout = $in{'webmin_notimeout'} ? 1 : 0;
|
|
print $PASSINw "verify $session_id $notimeout\n";
|
|
<$PASSOUTr> =~ /(\d+)\s+(\S+)/;
|
|
if ($1 == 2) {
|
|
# Valid session continuation
|
|
$validated = 1;
|
|
$authuser = $2;
|
|
#$already_session_id = $session_id;
|
|
$already_authuser = $authuser;
|
|
}
|
|
elsif ($1 == 1) {
|
|
# Session timed out
|
|
$timed_out = $2;
|
|
}
|
|
else {
|
|
# Invalid session ID .. don't set verified
|
|
}
|
|
}
|
|
}
|
|
|
|
# Check for local authentication
|
|
if ($localauth_user && !$header{'x-forwarded-for'} && !$header{'via'}) {
|
|
if (defined($users{$localauth_user})) {
|
|
# Local user exists in webmin users file
|
|
$validated = 1;
|
|
$authuser = $localauth_user;
|
|
}
|
|
else {
|
|
# Check if local user is allowed by unixauth
|
|
local @can = &can_user_login($localauth_user,
|
|
undef, $host);
|
|
if ($can[0]) {
|
|
$validated = 2;
|
|
$authuser = $localauth_user;
|
|
}
|
|
else {
|
|
$localauth_user = undef;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$validated) {
|
|
# Check if this path allows anonymous access
|
|
local $a;
|
|
foreach $a (keys %anonymous) {
|
|
if (substr($simple, 0, length($a)) eq $a) {
|
|
# It does! Auth as the user, if IP access
|
|
# control allows him.
|
|
if (&check_user_ip($anonymous{$a}) &&
|
|
&check_user_time($anonymous{$a})) {
|
|
$validated = 3;
|
|
$baseauthuser = $authuser =
|
|
$anonymous{$a};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$validated) {
|
|
# Check if this path allows unauthenticated access
|
|
local ($u, $unauth);
|
|
foreach $u (@unauth) {
|
|
$unauth++ if ($simple =~ /$u/);
|
|
}
|
|
if (!$bogus && $unauth) {
|
|
# Unauthenticated directory or file request - approve it
|
|
$validated = 4;
|
|
$baseauthuser = $authuser = undef;
|
|
}
|
|
}
|
|
|
|
if (!$validated) {
|
|
if ($blocked == 0) {
|
|
# No password given.. ask
|
|
if ($config{'pam_conv'} && $use_pam) {
|
|
# Force CGI for PAM question, starting with
|
|
# the username which is always needed
|
|
$validated = 1;
|
|
$method = "GET";
|
|
$querystring .= "&initial=1&question=".
|
|
&urlize("Username");
|
|
$querystring .= "&failed=$failed_user" if ($failed_user);
|
|
$querystring .= "&timed_out=$timed_out" if ($timed_out);
|
|
$queryargs = "";
|
|
$page = $config{'pam_login'};
|
|
$miniserv_internal = 1;
|
|
$logged_code = 401;
|
|
}
|
|
elsif ($config{'session'}) {
|
|
# Force CGI for session login
|
|
$validated = 1;
|
|
if ($logout) {
|
|
$querystring .= "&logout=1&page=/";
|
|
}
|
|
else {
|
|
# Re-direct to current module only
|
|
local $rpage = $request_uri;
|
|
if (!$config{'loginkeeppage'}) {
|
|
$rpage =~ s/\?.*$//;
|
|
$rpage =~ s/[^\/]+$//
|
|
}
|
|
$querystring = "page=".&urlize($rpage);
|
|
}
|
|
$method = "GET";
|
|
$querystring .= "&failed=$failed_user" if ($failed_user);
|
|
$querystring .= "&timed_out=$timed_out" if ($timed_out);
|
|
$queryargs = "";
|
|
$page = $config{'session_login'};
|
|
$miniserv_internal = 1;
|
|
$logged_code = 401;
|
|
}
|
|
else {
|
|
# Ask for login with HTTP authentication
|
|
&write_data("HTTP/1.0 401 Unauthorized\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_data("WWW-authenticate: Basic ".
|
|
"realm=\"$config{'realm'}\"\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("Content-type: text/html\r\n");
|
|
&write_data("\r\n");
|
|
&reset_byte_count();
|
|
&write_data("<html>\n");
|
|
&write_data("<head><title>Unauthorized</title></head>\n");
|
|
&write_data("<body><h1>Unauthorized</h1>\n");
|
|
&write_data("A password is required to access this\n");
|
|
&write_data("web server. Please try again. <p>\n");
|
|
&write_data("</body></html>\n");
|
|
&log_request($acpthost, undef, $reqline, 401, &byte_count());
|
|
return 0;
|
|
}
|
|
}
|
|
elsif ($blocked == 1) {
|
|
# when the host has been blocked, give it an error
|
|
&http_error(403, "Access denied for $acptip. The host ".
|
|
"has been blocked because of too ".
|
|
"many authentication failures.");
|
|
}
|
|
elsif ($blocked == 2) {
|
|
# when the user has been blocked, give it an error
|
|
&http_error(403, "Access denied. The user ".
|
|
"has been blocked because of too ".
|
|
"many authentication failures.");
|
|
}
|
|
}
|
|
else {
|
|
# Get the real Webmin username
|
|
local @can = &can_user_login($authuser, undef, $host);
|
|
$baseauthuser = $can[3] || $authuser;
|
|
|
|
if ($config{'remoteuser'} && !$< && $validated) {
|
|
# Switch to the UID of the remote user (if he exists)
|
|
local @u = getpwnam($authuser);
|
|
if (@u && $< != $u[2]) {
|
|
$( = $u[3]; $) = "$u[3] $u[3]";
|
|
($>, $<) = ($u[2], $u[2]);
|
|
}
|
|
else {
|
|
&http_error(500, "Unix user $authuser does not exist");
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
# Check per-user IP access control
|
|
if (!&check_user_ip($baseauthuser)) {
|
|
&http_error(403, "Access denied for $acptip");
|
|
return 0;
|
|
}
|
|
|
|
# Check per-user allowed times
|
|
if (!&check_user_time($baseauthuser)) {
|
|
&http_error(403, "Access denied at the current time");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
# Validate the path, and convert to canonical form
|
|
rerun:
|
|
$simple = &simplify_path($page, $bogus);
|
|
print DEBUG "handle_request: page=$page simple=$simple\n";
|
|
if ($bogus) {
|
|
&http_error(400, "Invalid path");
|
|
}
|
|
|
|
# Check for a DAV request
|
|
if ($davpath) {
|
|
return &handle_dav_request($davpath);
|
|
}
|
|
|
|
# Work out the active theme
|
|
local $preroot = $mobile_device && defined($config{'mobile_preroot'}) ?
|
|
$config{'mobile_preroot'} :
|
|
$authuser && defined($config{'preroot_'.$authuser}) ?
|
|
$config{'preroot_'.$authuser} :
|
|
$authuser && $baseauthuser &&
|
|
defined($config{'preroot_'.$baseauthuser}) ?
|
|
$config{'preroot_'.$baseauthuser} :
|
|
$config{'preroot'};
|
|
|
|
# Look for the file under the roots
|
|
local ($full, @stfull);
|
|
if ($preroot) {
|
|
# Always under the current webmin root
|
|
$preroot =~ s/^.*\///g;
|
|
$preroot = $roots[0].'/'.$preroot;
|
|
}
|
|
$foundroot = undef;
|
|
if ($preroot) {
|
|
# Look in the theme root directory first
|
|
$is_directory = 1;
|
|
$sofar = "";
|
|
$full = $preroot.$sofar;
|
|
$scriptname = $simple;
|
|
foreach $b (split(/\//, $simple)) {
|
|
if ($b ne "") { $sofar .= "/$b"; }
|
|
$full = $preroot.$sofar;
|
|
@stfull = stat($full);
|
|
if (!@stfull) { undef($full); last; }
|
|
|
|
# Check if this is a directory
|
|
if (-d _) {
|
|
# It is.. go on parsing
|
|
$is_directory = 1;
|
|
next;
|
|
}
|
|
else { $is_directory = 0; }
|
|
|
|
# Check if this is a CGI program
|
|
if (&get_type($full) eq "internal/cgi") {
|
|
$pathinfo = substr($simple, length($sofar));
|
|
$pathinfo .= "/" if ($page =~ /\/$/);
|
|
$scriptname = $sofar;
|
|
last;
|
|
}
|
|
}
|
|
if ($full) {
|
|
# Found it!
|
|
if ($sofar eq '') {
|
|
$cgi_pwd = $roots[0];
|
|
}
|
|
elsif ($is_directory) {
|
|
$cgi_pwd = "$roots[0]$sofar";
|
|
}
|
|
else {
|
|
"$roots[0]$sofar" =~ /^(.*\/)[^\/]+$/;
|
|
$cgi_pwd = $1;
|
|
}
|
|
$foundroot = $preroot;
|
|
if ($is_directory) {
|
|
# Check for index files in the directory
|
|
local $foundidx;
|
|
foreach $idx (split(/\s+/, $config{"index_docs"})) {
|
|
$idxfull = "$full/$idx";
|
|
local @stidxfull = stat($idxfull);
|
|
if (-r _ && !-d _) {
|
|
$full = $idxfull;
|
|
@stfull = @stidxfull;
|
|
$is_directory = 0;
|
|
$scriptname .= "/"
|
|
if ($scriptname ne "/");
|
|
$foundidx++;
|
|
last;
|
|
}
|
|
}
|
|
@stfull = stat($full) if (!$foundidx);
|
|
}
|
|
}
|
|
}
|
|
print DEBUG "handle_request: initial full=$full\n";
|
|
|
|
# Look in the real root directories, stopping when we find a file or directory
|
|
if (!$full || $is_directory) {
|
|
ROOT: foreach $root (@roots) {
|
|
$sofar = "";
|
|
$full = $root.$sofar;
|
|
$scriptname = $simple;
|
|
foreach $b ($simple eq "/" ? ( "" ) : split(/\//, $simple)) {
|
|
if ($b ne "") { $sofar .= "/$b"; }
|
|
$full = $root.$sofar;
|
|
@stfull = stat($full);
|
|
if (!@stfull) {
|
|
next ROOT;
|
|
}
|
|
|
|
# Check if this is a directory
|
|
if (-d _) {
|
|
# It is.. go on parsing
|
|
next;
|
|
}
|
|
|
|
# Check if this is a CGI program
|
|
if (&get_type($full) eq "internal/cgi") {
|
|
$pathinfo = substr($simple, length($sofar));
|
|
$pathinfo .= "/" if ($page =~ /\/$/);
|
|
$scriptname = $sofar;
|
|
last;
|
|
}
|
|
}
|
|
|
|
# Run CGI in the same directory as whatever file
|
|
# was requested
|
|
$full =~ /^(.*\/)[^\/]+$/; $cgi_pwd = $1;
|
|
|
|
if (-e $full) {
|
|
# Found something!
|
|
$realroot = $root;
|
|
$foundroot = $root;
|
|
last;
|
|
}
|
|
}
|
|
if (!@stfull) { &http_error(404, "File not found"); }
|
|
}
|
|
print DEBUG "handle_request: full=$full\n";
|
|
@stfull = stat($full) if (!@stfull);
|
|
|
|
# check filename against denyfile regexp
|
|
local $denyfile = $config{'denyfile'};
|
|
if ($denyfile && $full =~ /$denyfile/) {
|
|
&http_error(403, "Access denied to $page");
|
|
return 0;
|
|
}
|
|
|
|
# Reached the end of the path OK.. see what we've got
|
|
if (-d _) {
|
|
# See if the URL ends with a / as it should
|
|
print DEBUG "handle_request: found a directory\n";
|
|
if ($page !~ /\/$/) {
|
|
# It doesn't.. redirect
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
$ssl = $use_ssl || $config{'inetd_ssl'};
|
|
$portstr = $port == 80 && !$ssl ? "" :
|
|
$port == 443 && $ssl ? "" : ":$port";
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{server}\r\n");
|
|
$prot = $ssl ? "https" : "http";
|
|
&write_data("Location: $prot://$host$portstr$page/\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&log_request($acpthost, $authuser, $reqline, 302, 0);
|
|
return 0;
|
|
}
|
|
# A directory.. check for index files
|
|
local $foundidx;
|
|
foreach $idx (split(/\s+/, $config{"index_docs"})) {
|
|
$idxfull = "$full/$idx";
|
|
@stidxfull = stat($idxfull);
|
|
if (-r _ && !-d _) {
|
|
$cgi_pwd = $full;
|
|
$full = $idxfull;
|
|
@stfull = @stidxfull;
|
|
$scriptname .= "/" if ($scriptname ne "/");
|
|
$foundidx++;
|
|
last;
|
|
}
|
|
}
|
|
@stfull = stat($full) if (!$foundidx);
|
|
}
|
|
if (-d _) {
|
|
# This is definately a directory.. list it
|
|
print DEBUG "handle_request: listing directory\n";
|
|
local $resp = "HTTP/1.0 $ok_code $ok_message\r\n".
|
|
"Date: $datestr\r\n".
|
|
"Server: $config{server}\r\n".
|
|
"Content-type: text/html\r\n";
|
|
&write_data($resp);
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&reset_byte_count();
|
|
&write_data("<h1>Index of $simple</h1>\n");
|
|
&write_data("<pre>\n");
|
|
&write_data(sprintf "%-35.35s %-20.20s %-10.10s\n",
|
|
"Name", "Last Modified", "Size");
|
|
&write_data("<hr>\n");
|
|
opendir(DIR, $full);
|
|
while($df = readdir(DIR)) {
|
|
if ($df =~ /^\./) { next; }
|
|
$fulldf = $full eq "/" ? $full.$df : $full."/".$df;
|
|
(@stbuf = stat($fulldf)) || next;
|
|
if (-d _) { $df .= "/"; }
|
|
@tm = localtime($stbuf[9]);
|
|
$fdate = sprintf "%2.2d/%2.2d/%4.4d %2.2d:%2.2d:%2.2d",
|
|
$tm[3],$tm[4]+1,$tm[5]+1900,
|
|
$tm[0],$tm[1],$tm[2];
|
|
$len = length($df); $rest = " "x(35-$len);
|
|
&write_data(sprintf
|
|
"<a href=\"%s\">%-${len}.${len}s</a>$rest %-20.20s %-10.10s\n",
|
|
$df, $df, $fdate, $stbuf[7]);
|
|
}
|
|
closedir(DIR);
|
|
&log_request($acpthost, $authuser, $reqline, $ok_code, &byte_count());
|
|
return 0;
|
|
}
|
|
|
|
# CGI or normal file
|
|
local $rv;
|
|
if (&get_type($full) eq "internal/cgi" && $validated != 4) {
|
|
# A CGI program to execute
|
|
print DEBUG "handle_request: executing CGI\n";
|
|
$envtz = $ENV{"TZ"};
|
|
$envuser = $ENV{"USER"};
|
|
$envpath = $ENV{"PATH"};
|
|
$envlang = $ENV{"LANG"};
|
|
$envroot = $ENV{"SystemRoot"};
|
|
foreach my $k (keys %ENV) {
|
|
delete($ENV{$k});
|
|
}
|
|
$ENV{"PATH"} = $envpath if ($envpath);
|
|
$ENV{"TZ"} = $envtz if ($envtz);
|
|
$ENV{"USER"} = $envuser if ($envuser);
|
|
$ENV{"OLD_LANG"} = $envlang if ($envlang);
|
|
$ENV{"SystemRoot"} = $envroot if ($envroot);
|
|
$ENV{"HOME"} = $user_homedir;
|
|
$ENV{"SERVER_SOFTWARE"} = $config{"server"};
|
|
$ENV{"SERVER_NAME"} = $host;
|
|
$ENV{"SERVER_ADMIN"} = $config{"email"};
|
|
$ENV{"SERVER_ROOT"} = $roots[0];
|
|
$ENV{"SERVER_REALROOT"} = $realroot;
|
|
$ENV{"SERVER_PORT"} = $port;
|
|
$ENV{"REMOTE_HOST"} = $acpthost;
|
|
$ENV{"REMOTE_ADDR"} = $acptip;
|
|
$ENV{"REMOTE_USER"} = $authuser;
|
|
$ENV{"BASE_REMOTE_USER"} = $authuser ne $baseauthuser ?
|
|
$baseauthuser : undef;
|
|
$ENV{"REMOTE_PASS"} = $authpass if (defined($authpass) &&
|
|
$config{'pass_password'});
|
|
print DEBUG "REMOTE_USER = ",$ENV{"REMOTE_USER"},"\n";
|
|
print DEBUG "BASE_REMOTE_USER = ",$ENV{"BASE_REMOTE_USER"},"\n";
|
|
$ENV{"SSL_USER"} = $peername if ($validated == 2);
|
|
$ENV{"ANONYMOUS_USER"} = "1" if ($validated == 3 || $validated == 4);
|
|
$ENV{"DOCUMENT_ROOT"} = $roots[0];
|
|
$ENV{"DOCUMENT_REALROOT"} = $realroot;
|
|
$ENV{"GATEWAY_INTERFACE"} = "CGI/1.1";
|
|
$ENV{"SERVER_PROTOCOL"} = "HTTP/1.0";
|
|
$ENV{"REQUEST_METHOD"} = $method;
|
|
$ENV{"SCRIPT_NAME"} = $scriptname;
|
|
$ENV{"SCRIPT_FILENAME"} = $full;
|
|
$ENV{"REQUEST_URI"} = $request_uri;
|
|
$ENV{"PATH_INFO"} = $pathinfo;
|
|
if ($pathinfo) {
|
|
$ENV{"PATH_TRANSLATED"} = "$roots[0]$pathinfo";
|
|
$ENV{"PATH_REALTRANSLATED"} = "$realroot$pathinfo";
|
|
}
|
|
$ENV{"QUERY_STRING"} = $querystring;
|
|
$ENV{"MINISERV_CONFIG"} = $config_file;
|
|
$ENV{"HTTPS"} = "ON" if ($use_ssl || $config{'inetd_ssl'});
|
|
$ENV{"SESSION_ID"} = $session_id if ($session_id);
|
|
$ENV{"LOCAL_USER"} = $localauth_user if ($localauth_user);
|
|
$ENV{"MINISERV_INTERNAL"} = $miniserv_internal if ($miniserv_internal);
|
|
if (defined($header{"content-length"})) {
|
|
$ENV{"CONTENT_LENGTH"} = $header{"content-length"};
|
|
}
|
|
if (defined($header{"content-type"})) {
|
|
$ENV{"CONTENT_TYPE"} = $header{"content-type"};
|
|
}
|
|
foreach $h (keys %header) {
|
|
($hname = $h) =~ tr/a-z/A-Z/;
|
|
$hname =~ s/\-/_/g;
|
|
$ENV{"HTTP_$hname"} = $header{$h};
|
|
}
|
|
$ENV{"PWD"} = $cgi_pwd;
|
|
foreach $k (keys %config) {
|
|
if ($k =~ /^env_(\S+)$/) {
|
|
$ENV{$1} = $config{$k};
|
|
}
|
|
}
|
|
delete($ENV{'HTTP_AUTHORIZATION'});
|
|
$ENV{'HTTP_COOKIE'} =~ s/;?\s*$sidname=([a-f0-9]+)//;
|
|
$ENV{'MOBILE_DEVICE'} = 1 if ($mobile_device);
|
|
|
|
# Check if the CGI can be handled internally
|
|
open(CGI, $full);
|
|
local $first = <CGI>;
|
|
close(CGI);
|
|
$first =~ s/[#!\r\n]//g;
|
|
$nph_script = ($full =~ /\/nph-([^\/]+)$/);
|
|
seek(STDERR, 0, 2);
|
|
if (!$config{'forkcgis'} &&
|
|
($first eq $perl_path || $first eq $linked_perl_path) &&
|
|
$] >= 5.004 ||
|
|
$config{'internalcgis'}) {
|
|
# setup environment for eval
|
|
chdir($ENV{"PWD"});
|
|
@ARGV = split(/\s+/, $queryargs);
|
|
$0 = $full;
|
|
if ($posted_data) {
|
|
# Already read the post input
|
|
$postinput = $posted_data;
|
|
}
|
|
$clen = $header{"content-length"};
|
|
$SIG{'CHLD'} = 'DEFAULT';
|
|
eval {
|
|
# Have SOCK closed if the perl exec's something
|
|
use Fcntl;
|
|
fcntl(SOCK, F_SETFD, FD_CLOEXEC);
|
|
};
|
|
#shutdown(SOCK, 0);
|
|
|
|
if ($config{'log'}) {
|
|
open(MINISERVLOG, ">>$config{'logfile'}");
|
|
if ($config{'logperms'}) {
|
|
chmod(oct($config{'logperms'}),
|
|
$config{'logfile'});
|
|
}
|
|
else {
|
|
chmod(0600, $config{'logfile'});
|
|
}
|
|
}
|
|
$doing_eval = 1;
|
|
$main_process_id = $$;
|
|
$pkg = "main";
|
|
if ($config{'eval_package'}) {
|
|
# Eval in package from Webmin module name
|
|
if ($full =~ /^\Q$foundroot\E\/([^\/]+)\//) {
|
|
$pkg = $1;
|
|
$pkg =~ s/[^A-Za-z0-9]/_/g;
|
|
}
|
|
}
|
|
eval "
|
|
\%pkg::ENV = \%ENV;
|
|
package $pkg;
|
|
tie(*STDOUT, 'miniserv');
|
|
tie(*STDIN, 'miniserv');
|
|
do \$miniserv::full;
|
|
die \$@ if (\$@);
|
|
";
|
|
$doing_eval = 0;
|
|
if ($@) {
|
|
# Error in perl!
|
|
&http_error(500, "Perl execution failed",
|
|
$config{'noshowstderr'} ? undef : $@);
|
|
}
|
|
elsif (!$doneheaders && !$nph_script) {
|
|
&http_error(500, "Missing Headers");
|
|
}
|
|
$rv = 0;
|
|
}
|
|
else {
|
|
$infile = undef;
|
|
if (!$on_windows) {
|
|
# fork the process that actually executes the CGI
|
|
pipe(CGIINr, CGIINw);
|
|
pipe(CGIOUTr, CGIOUTw);
|
|
pipe(CGIERRr, CGIERRw);
|
|
if (!($cgipid = fork())) {
|
|
@execargs = ( $full, split(/\s+/, $queryargs) );
|
|
chdir($ENV{"PWD"});
|
|
close(SOCK);
|
|
open(STDIN, "<&CGIINr");
|
|
open(STDOUT, ">&CGIOUTw");
|
|
open(STDERR, ">&CGIERRw");
|
|
close(CGIINw); close(CGIOUTr); close(CGIERRr);
|
|
exec(@execargs) ||
|
|
die "Failed to exec $full : $!\n";
|
|
exit(0);
|
|
}
|
|
close(CGIINr); close(CGIOUTw); close(CGIERRw);
|
|
}
|
|
else {
|
|
# write CGI input to a temp file
|
|
$infile = "$config{'tempbase'}.$$";
|
|
open(CGIINw, ">$infile");
|
|
# NOT binary mode, as CGIs don't read in it!
|
|
}
|
|
|
|
# send post data
|
|
if ($posted_data) {
|
|
# already read the posted data
|
|
print CGIINw $posted_data;
|
|
}
|
|
$clen = $header{"content-length"};
|
|
if ($method eq "POST" && $clen_read < $clen) {
|
|
$SIG{'PIPE'} = 'IGNORE';
|
|
$got = $clen_read;
|
|
while($got < $clen) {
|
|
$buf = &read_data($clen-$got);
|
|
if (!length($buf)) {
|
|
kill('TERM', $cgipid);
|
|
unlink($infile) if ($infile);
|
|
&http_error(500, "Failed to read ".
|
|
"POST request");
|
|
}
|
|
$got += length($buf);
|
|
local ($wrote) = (print CGIINw $buf);
|
|
last if (!$wrote);
|
|
}
|
|
# If the CGI terminated early, we still need to read
|
|
# from the browser and throw away
|
|
while($got < $clen) {
|
|
$buf = &read_data($clen-$got);
|
|
if (!length($buf)) {
|
|
kill('TERM', $cgipid);
|
|
unlink($infile) if ($infile);
|
|
&http_error(500, "Failed to read ".
|
|
"POST request");
|
|
}
|
|
$got += length($buf);
|
|
}
|
|
$SIG{'PIPE'} = 'DEFAULT';
|
|
}
|
|
close(CGIINw);
|
|
shutdown(SOCK, 0);
|
|
|
|
if ($on_windows) {
|
|
# Run the CGI program, and feed it input
|
|
chdir($ENV{"PWD"});
|
|
local $qqueryargs = join(" ", map { "\"$_\"" }
|
|
split(/\s+/, $queryargs));
|
|
if ($first =~ /(perl|perl.exe)$/i) {
|
|
# On Windows, run with Perl
|
|
open(CGIOUTr, "$perl_path \"$full\" $qqueryargs <$infile |");
|
|
}
|
|
else {
|
|
open(CGIOUTr, "\"$full\" $qqueryargs <$infile |");
|
|
}
|
|
binmode(CGIOUTr);
|
|
}
|
|
|
|
if (!$nph_script) {
|
|
# read back cgi headers
|
|
select(CGIOUTr); $|=1; select(STDOUT);
|
|
$got_blank = 0;
|
|
while(1) {
|
|
$line = <CGIOUTr>;
|
|
$line =~ s/\r|\n//g;
|
|
if ($line eq "") {
|
|
if ($got_blank || %cgiheader) { last; }
|
|
$got_blank++;
|
|
next;
|
|
}
|
|
if ($line !~ /^(\S+):\s+(.*)$/) {
|
|
$errs = &read_errors(CGIERRr);
|
|
close(CGIOUTr); close(CGIERRr);
|
|
unlink($infile) if ($infile);
|
|
&http_error(500, "Bad Header", $errs);
|
|
}
|
|
$cgiheader{lc($1)} = $2;
|
|
push(@cgiheader, [ $1, $2 ]);
|
|
}
|
|
if ($cgiheader{"location"}) {
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_keep_alive(0);
|
|
# ignore the rest of the output. This is a hack,
|
|
# but is necessary for IE in some cases :(
|
|
close(CGIOUTr); close(CGIERRr);
|
|
}
|
|
elsif ($cgiheader{"content-type"} eq "") {
|
|
close(CGIOUTr); close(CGIERRr);
|
|
unlink($infile) if ($infile);
|
|
$errs = &read_errors(CGIERRr);
|
|
&http_error(500, "Missing Content-Type Header",
|
|
$config{'noshowstderr'} ? undef : $errs);
|
|
}
|
|
else {
|
|
&write_data("HTTP/1.0 $ok_code $ok_message\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_keep_alive(0);
|
|
}
|
|
foreach $h (@cgiheader) {
|
|
&write_data("$h->[0]: $h->[1]\r\n");
|
|
}
|
|
&write_data("\r\n");
|
|
}
|
|
&reset_byte_count();
|
|
while($line = <CGIOUTr>) {
|
|
&write_data($line);
|
|
}
|
|
close(CGIOUTr);
|
|
close(CGIERRr);
|
|
unlink($infile) if ($infile);
|
|
$rv = 0;
|
|
}
|
|
}
|
|
else {
|
|
# A file to output
|
|
print DEBUG "handle_request: outputting file\n";
|
|
open(FILE, $full) || &http_error(404, "Failed to open file");
|
|
binmode(FILE);
|
|
local $resp = "HTTP/1.0 $ok_code $ok_message\r\n".
|
|
"Date: $datestr\r\n".
|
|
"Server: $config{server}\r\n".
|
|
"Content-type: ".&get_type($full)."\r\n".
|
|
"Content-length: $stfull[7]\r\n".
|
|
"Last-Modified: ".&http_date($stfull[9])."\r\n".
|
|
"Expires: ".&http_date(time()+$config{'expires'})."\r\n";
|
|
&write_data($resp);
|
|
$rv = &write_keep_alive();
|
|
&write_data("\r\n");
|
|
&reset_byte_count();
|
|
while(read(FILE, $buf, 1024) > 0) {
|
|
&write_data($buf);
|
|
}
|
|
close(FILE);
|
|
}
|
|
|
|
# log the request
|
|
&log_request($acpthost, $authuser, $reqline,
|
|
$logged_code ? $logged_code :
|
|
$cgiheader{"location"} ? "302" : $ok_code, &byte_count());
|
|
return $rv;
|
|
}
|
|
|
|
# http_error(code, message, body, [dontexit])
|
|
sub http_error
|
|
{
|
|
local $eh = $error_handler_recurse ? undef :
|
|
$config{"error_handler_$_[0]"} ? $config{"error_handler_$_[0]"} :
|
|
$config{'error_handler'} ? $config{'error_handler'} : undef;
|
|
print DEBUG "http_error code=$_[0] message=$_[1] body=$_[2]\n";
|
|
if ($eh) {
|
|
# Call a CGI program for the error
|
|
$page = "/$eh";
|
|
$querystring = "code=$_[0]&message=".&urlize($_[1]).
|
|
"&body=".&urlize($_[2]);
|
|
$error_handler_recurse++;
|
|
$ok_code = $_[0];
|
|
$ok_message = $_[1];
|
|
goto rerun;
|
|
}
|
|
else {
|
|
# Use the standard error message display
|
|
&write_data("HTTP/1.0 $_[0] $_[1]\r\n");
|
|
&write_data("Server: $config{server}\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Content-type: text/html\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&reset_byte_count();
|
|
&write_data("<h1>Error - $_[1]</h1>\n");
|
|
if ($_[2]) {
|
|
&write_data("<pre>$_[2]</pre>\n");
|
|
}
|
|
}
|
|
&log_request($acpthost, $authuser, $reqline, $_[0], &byte_count())
|
|
if ($reqline);
|
|
&log_error($_[1], $_[2] ? " : $_[2]" : "");
|
|
shutdown(SOCK, 1);
|
|
exit if (!$_[3]);
|
|
}
|
|
|
|
sub get_type
|
|
{
|
|
if ($_[0] =~ /\.([A-z0-9]+)$/) {
|
|
$t = $mime{$1};
|
|
if ($t ne "") {
|
|
return $t;
|
|
}
|
|
}
|
|
return "text/plain";
|
|
}
|
|
|
|
# simplify_path(path, bogus)
|
|
# Given a path, maybe containing stuff like ".." and "." convert it to a
|
|
# clean, absolute form.
|
|
sub simplify_path
|
|
{
|
|
local($dir, @bits, @fixedbits, $b);
|
|
$dir = $_[0];
|
|
$dir =~ s/\\/\//g; # fix windows \ in path
|
|
$dir =~ s/^\/+//g;
|
|
$dir =~ s/\/+$//g;
|
|
$dir =~ s/\0//g; # remove null bytes
|
|
@bits = split(/\/+/, $dir);
|
|
@fixedbits = ();
|
|
$_[1] = 0;
|
|
foreach $b (@bits) {
|
|
if ($b eq ".") {
|
|
# Do nothing..
|
|
}
|
|
elsif ($b eq ".." || $b eq "...") {
|
|
# Remove last dir
|
|
if (scalar(@fixedbits) == 0) {
|
|
$_[1] = 1;
|
|
return "/";
|
|
}
|
|
pop(@fixedbits);
|
|
}
|
|
else {
|
|
# Add dir to list
|
|
push(@fixedbits, $b);
|
|
}
|
|
}
|
|
return "/" . join('/', @fixedbits);
|
|
}
|
|
|
|
# b64decode(string)
|
|
# Converts a string from base64 format to normal
|
|
sub b64decode
|
|
{
|
|
local($str) = $_[0];
|
|
local($res);
|
|
$str =~ tr|A-Za-z0-9+=/||cd;
|
|
$str =~ s/=+$//;
|
|
$str =~ tr|A-Za-z0-9+/| -_|;
|
|
while ($str =~ /(.{1,60})/gs) {
|
|
my $len = chr(32 + length($1)*3/4);
|
|
$res .= unpack("u", $len . $1 );
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
# ip_match(remoteip, localip, [match]+)
|
|
# Checks an IP address against a list of IPs, networks and networks/masks
|
|
sub ip_match
|
|
{
|
|
local(@io, @mo, @ms, $i, $j, $hn, $needhn);
|
|
@io = split(/\./, $_[0]);
|
|
for($i=2; $i<@_; $i++) {
|
|
$needhn++ if ($_[$i] =~ /^\*(\S+)$/);
|
|
}
|
|
if ($needhn && !defined($hn = $ip_match_cache{$_[0]})) {
|
|
$hn = gethostbyaddr(inet_aton($_[0]), AF_INET);
|
|
$hn = "" if (&to_ipaddress($hn) ne $_[0]);
|
|
$ip_match_cache{$_[0]} = $hn;
|
|
}
|
|
for($i=2; $i<@_; $i++) {
|
|
local $mismatch = 0;
|
|
if ($_[$i] =~ /^(\S+)\/(\d+)$/) {
|
|
# Convert CIDR to netmask format
|
|
$_[$i] = $1."/".&prefix_to_mask($2);
|
|
}
|
|
if ($_[$i] =~ /^(\S+)\/(\S+)$/) {
|
|
# Compare with network/mask
|
|
@mo = split(/\./, $1); @ms = split(/\./, $2);
|
|
for($j=0; $j<4; $j++) {
|
|
if ((int($io[$j]) & int($ms[$j])) != int($mo[$j])) {
|
|
$mismatch = 1;
|
|
}
|
|
}
|
|
}
|
|
elsif ($_[$i] =~ /^\*(\S+)$/) {
|
|
# Compare with hostname regexp
|
|
$mismatch = 1 if ($hn !~ /$1$/);
|
|
}
|
|
elsif ($_[$i] eq 'LOCAL') {
|
|
# Compare with local network
|
|
local @lo = split(/\./, $_[1]);
|
|
if ($lo[0] < 128) {
|
|
$mismatch = 1 if ($lo[0] != $io[0]);
|
|
}
|
|
elsif ($lo[0] < 192) {
|
|
$mismatch = 1 if ($lo[0] != $io[0] ||
|
|
$lo[1] != $io[1]);
|
|
}
|
|
else {
|
|
$mismatch = 1 if ($lo[0] != $io[0] ||
|
|
$lo[1] != $io[1] ||
|
|
$lo[2] != $io[2]);
|
|
}
|
|
}
|
|
elsif ($_[$i] !~ /^[0-9\.]+$/) {
|
|
# Compare with hostname
|
|
$mismatch = 1 if ($_[0] ne &to_ipaddress($_[$i]));
|
|
}
|
|
else {
|
|
# Compare with IP or network
|
|
@mo = split(/\./, $_[$i]);
|
|
while(@mo && !$mo[$#mo]) { pop(@mo); }
|
|
for($j=0; $j<@mo; $j++) {
|
|
if ($mo[$j] != $io[$j]) {
|
|
$mismatch = 1;
|
|
}
|
|
}
|
|
}
|
|
return 1 if (!$mismatch);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
# users_match(&uinfo, user, ...)
|
|
# Returns 1 if a user is in a list of users and groups
|
|
sub users_match
|
|
{
|
|
local $uinfo = shift(@_);
|
|
local $u;
|
|
local @ginfo = getgrgid($uinfo->[3]);
|
|
foreach $u (@_) {
|
|
if ($u =~ /^\@(\S+)$/) {
|
|
return 1 if (&is_group_member($uinfo, $1));
|
|
}
|
|
elsif ($u =~ /^(\d*)-(\d*)$/ && ($1 || $2)) {
|
|
return (!$1 || $uinfo[2] >= $1) &&
|
|
(!$2 || $uinfo[2] <= $2);
|
|
}
|
|
else {
|
|
return 1 if ($u eq $uinfo->[0]);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
# restart_miniserv()
|
|
# Called when a SIGHUP is received to restart the web server. This is done
|
|
# by exec()ing perl with the same command line as was originally used
|
|
sub restart_miniserv
|
|
{
|
|
print STDERR "restarting miniserv\n";
|
|
&log_error("Restarting");
|
|
close(SOCK);
|
|
&close_all_sockets();
|
|
&close_all_pipes();
|
|
kill('KILL', $logclearer) if ($logclearer);
|
|
kill('KILL', $extauth) if ($extauth);
|
|
exec($perl_path, $miniserv_path, @miniserv_argv);
|
|
die "Failed to restart miniserv with $perl_path $miniserv_path";
|
|
}
|
|
|
|
sub trigger_restart
|
|
{
|
|
$need_restart = 1;
|
|
}
|
|
|
|
sub trigger_reload
|
|
{
|
|
$need_reload = 1;
|
|
}
|
|
|
|
sub to_ipaddress
|
|
{
|
|
local (@rv, $i);
|
|
foreach $i (@_) {
|
|
if ($i =~ /(\S+)\/(\S+)/ || $i =~ /^\*\S+$/ ||
|
|
$i eq 'LOCAL' || $i =~ /^[0-9\.]+$/) { push(@rv, $i); }
|
|
else { push(@rv, join('.', unpack("CCCC", inet_aton($i)))); }
|
|
}
|
|
return wantarray ? @rv : $rv[0];
|
|
}
|
|
|
|
# read_line(no-wait, no-limit)
|
|
# Reads one line from SOCK or SSL
|
|
sub read_line
|
|
{
|
|
local ($nowait, $nolimit) = @_;
|
|
local($idx, $more, $rv);
|
|
while(($idx = index($main::read_buffer, "\n")) < 0) {
|
|
if (length($main::read_buffer) > 10000 && !$nolimit) {
|
|
&http_error(414, "Request too long",
|
|
"Received excessive line <pre>$main::read_buffer</pre>");
|
|
}
|
|
|
|
# need to read more..
|
|
&wait_for_data_error() if (!$nowait);
|
|
if ($use_ssl) {
|
|
$more = Net::SSLeay::read($ssl_con);
|
|
}
|
|
else {
|
|
local $ok = sysread(SOCK, $more, 1024);
|
|
$more = undef if ($ok <= 0);
|
|
}
|
|
if ($more eq '') {
|
|
# end of the data
|
|
$rv = $main::read_buffer;
|
|
undef($main::read_buffer);
|
|
return $rv;
|
|
}
|
|
$main::read_buffer .= $more;
|
|
}
|
|
$rv = substr($main::read_buffer, 0, $idx+1);
|
|
$main::read_buffer = substr($main::read_buffer, $idx+1);
|
|
return $rv;
|
|
}
|
|
|
|
# read_data(length)
|
|
# Reads up to some amount of data from SOCK or the SSL connection
|
|
sub read_data
|
|
{
|
|
local ($rv);
|
|
if (length($main::read_buffer)) {
|
|
if (length($main::read_buffer) > $_[0]) {
|
|
# Return the first part of the buffer
|
|
$rv = substr($main::read_buffer, 0, $_[0]);
|
|
$main::read_buffer = substr($main::read_buffer, $_[0]);
|
|
return $rv;
|
|
}
|
|
else {
|
|
# Return the whole buffer
|
|
$rv = $main::read_buffer;
|
|
undef($main::read_buffer);
|
|
return $rv;
|
|
}
|
|
}
|
|
elsif ($use_ssl) {
|
|
# Call SSL read function
|
|
return Net::SSLeay::read($ssl_con, $_[0]);
|
|
}
|
|
else {
|
|
# Just do a normal read
|
|
local $buf;
|
|
sysread(SOCK, $buf, $_[0]) || return undef;
|
|
return $buf;
|
|
}
|
|
}
|
|
|
|
# sysread_line(fh)
|
|
# Read a line from a file handle, using sysread to get a byte at a time
|
|
sub sysread_line
|
|
{
|
|
local ($fh) = @_;
|
|
local $line;
|
|
while(1) {
|
|
local ($buf, $got);
|
|
$got = sysread($fh, $buf, 1);
|
|
last if ($got <= 0);
|
|
$line .= $buf;
|
|
last if ($buf eq "\n");
|
|
}
|
|
return $line;
|
|
}
|
|
|
|
# wait_for_data(secs)
|
|
# Waits at most the given amount of time for some data on SOCK, returning
|
|
# 0 if not found, 1 if some arrived.
|
|
sub wait_for_data
|
|
{
|
|
local $rmask;
|
|
vec($rmask, fileno(SOCK), 1) = 1;
|
|
local $got = select($rmask, undef, undef, $_[0]);
|
|
return $got == 0 ? 0 : 1;
|
|
}
|
|
|
|
# wait_for_data_error()
|
|
# Waits 60 seconds for data on SOCK, and fails if none arrives
|
|
sub wait_for_data_error
|
|
{
|
|
local $got = &wait_for_data(60);
|
|
if (!$got) {
|
|
&http_error(400, "Timeout",
|
|
"Waited more than 60 seconds for request data");
|
|
}
|
|
}
|
|
|
|
# write_data(data, ...)
|
|
# Writes a string to SOCK or the SSL connection
|
|
sub write_data
|
|
{
|
|
local $str = join("", @_);
|
|
if ($use_ssl) {
|
|
Net::SSLeay::write($ssl_con, $str);
|
|
}
|
|
else {
|
|
syswrite(SOCK, $str, length($str));
|
|
}
|
|
# Intentionally introduce a small delay to avoid problems where IE reports
|
|
# the page as empty / DNS failed when it get a large response too quickly!
|
|
select(undef, undef, undef, .01) if ($write_data_count%10 == 0);
|
|
$write_data_count += length($str);
|
|
}
|
|
|
|
# reset_byte_count()
|
|
sub reset_byte_count { $write_data_count = 0; }
|
|
|
|
# byte_count()
|
|
sub byte_count { return $write_data_count; }
|
|
|
|
# log_request(hostname, user, request, code, bytes)
|
|
sub log_request
|
|
{
|
|
if ($config{'log'}) {
|
|
local ($user, $ident, $headers);
|
|
if ($config{'logident'}) {
|
|
# add support for rfc1413 identity checking here
|
|
}
|
|
else { $ident = "-"; }
|
|
$user = $_[1] ? $_[1] : "-";
|
|
local $dstr = &make_datestr();
|
|
if (fileno(MINISERVLOG)) {
|
|
seek(MINISERVLOG, 0, 2);
|
|
}
|
|
else {
|
|
open(MINISERVLOG, ">>$config{'logfile'}");
|
|
chmod(0600, $config{'logfile'});
|
|
}
|
|
if (defined($config{'logheaders'})) {
|
|
foreach $h (split(/\s+/, $config{'logheaders'})) {
|
|
$headers .= " $h=\"$header{$h}\"";
|
|
}
|
|
}
|
|
elsif ($config{'logclf'}) {
|
|
$headers = " \"$header{'referer'}\" \"$header{'user-agent'}\"";
|
|
}
|
|
else {
|
|
$headers = "";
|
|
}
|
|
print MINISERVLOG "$_[0] $ident $user [$dstr] \"$_[2]\" ",
|
|
"$_[3] $_[4]$headers\n";
|
|
close(MINISERVLOG);
|
|
}
|
|
}
|
|
|
|
# make_datestr()
|
|
sub make_datestr
|
|
{
|
|
local @tm = localtime(time());
|
|
return sprintf "%2.2d/%s/%4.4d:%2.2d:%2.2d:%2.2d %s",
|
|
$tm[3], $month[$tm[4]], $tm[5]+1900,
|
|
$tm[2], $tm[1], $tm[0], $timezone;
|
|
}
|
|
|
|
# log_error(message)
|
|
sub log_error
|
|
{
|
|
seek(STDERR, 0, 2);
|
|
print STDERR "[",&make_datestr(),"] ",
|
|
$acpthost ? ( "[",$acpthost,"] " ) : ( ),
|
|
$page ? ( $page," : " ) : ( ),
|
|
@_,"\n";
|
|
}
|
|
|
|
# read_errors(handle)
|
|
# Read and return all input from some filehandle
|
|
sub read_errors
|
|
{
|
|
local($fh, $_, $rv);
|
|
$fh = $_[0];
|
|
while(<$fh>) { $rv .= $_; }
|
|
return $rv;
|
|
}
|
|
|
|
sub write_keep_alive
|
|
{
|
|
local $mode;
|
|
if ($config{'nokeepalive'}) {
|
|
# Keep alives have been disabled in config
|
|
$mode = 0;
|
|
}
|
|
elsif (@childpids > $config{'maxconns'}*.8) {
|
|
# Disable because nearing process limit
|
|
$mode = 0;
|
|
}
|
|
elsif (@_) {
|
|
# Keep alive specified by caller
|
|
$mode = $_[0];
|
|
}
|
|
else {
|
|
# Keep alive determined by browser
|
|
$mode = $header{'connection'} =~ /keep-alive/i;
|
|
}
|
|
&write_data("Connection: ".($mode ? "Keep-Alive" : "close")."\r\n");
|
|
return $mode;
|
|
}
|
|
|
|
sub term_handler
|
|
{
|
|
kill('TERM', @childpids) if (@childpids);
|
|
kill('KILL', $logclearer) if ($logclearer);
|
|
kill('KILL', $extauth) if ($extauth);
|
|
exit(1);
|
|
}
|
|
|
|
sub http_date
|
|
{
|
|
local @tm = gmtime($_[0]);
|
|
return sprintf "%s, %d %s %d %2.2d:%2.2d:%2.2d GMT",
|
|
$weekday[$tm[6]], $tm[3], $month[$tm[4]], $tm[5]+1900,
|
|
$tm[2], $tm[1], $tm[0];
|
|
}
|
|
|
|
sub TIEHANDLE
|
|
{
|
|
my $i; bless \$i, shift;
|
|
}
|
|
|
|
sub WRITE
|
|
{
|
|
$r = shift;
|
|
my($buf,$len,$offset) = @_;
|
|
&write_to_sock(substr($buf, $offset, $len));
|
|
}
|
|
|
|
sub PRINT
|
|
{
|
|
$r = shift;
|
|
$$r++;
|
|
my $buf = join(defined($,) ? $, : "", @_);
|
|
$buf .= $\ if defined($\);
|
|
&write_to_sock($buf);
|
|
}
|
|
|
|
sub PRINTF
|
|
{
|
|
shift;
|
|
my $fmt = shift;
|
|
&write_to_sock(sprintf $fmt, @_);
|
|
}
|
|
|
|
# Send back already read data while we have it, then read from SOCK
|
|
sub READ
|
|
{
|
|
my $r = shift;
|
|
my $bufref = \$_[0];
|
|
my $len = $_[1];
|
|
my $offset = $_[2];
|
|
if ($postpos < length($postinput)) {
|
|
# Reading from already fetched array
|
|
my $left = length($postinput) - $postpos;
|
|
my $canread = $len > $left ? $left : $len;
|
|
substr($$bufref, $offset, $canread) =
|
|
substr($postinput, $postpos, $canread);
|
|
$postpos += $canread;
|
|
return $canread;
|
|
}
|
|
else {
|
|
# Read from network socket
|
|
local $data = &read_data($len);
|
|
if ($data eq '' && $len) {
|
|
# End of socket
|
|
print STDERR "finished reading - shutting down socket\n";
|
|
shutdown(SOCK, 0);
|
|
}
|
|
substr($$bufref, $offset, length($data)) = $data;
|
|
return length($data);
|
|
}
|
|
}
|
|
|
|
sub OPEN
|
|
{
|
|
#print STDERR "open() called - should never happen!\n";
|
|
}
|
|
|
|
# Read a line of input
|
|
sub READLINE
|
|
{
|
|
my $r = shift;
|
|
if ($postpos < length($postinput) &&
|
|
($idx = index($postinput, "\n", $postpos)) >= 0) {
|
|
# A line exists in the memory buffer .. use it
|
|
my $line = substr($postinput, $postpos, $idx-$postpos+1);
|
|
$postpos = $idx+1;
|
|
return $line;
|
|
}
|
|
else {
|
|
# Need to read from the socket
|
|
my $line;
|
|
if ($postpos < length($postinput)) {
|
|
# Start with in-memory data
|
|
$line = substr($postinput, $postpos);
|
|
$postpos = length($postinput);
|
|
}
|
|
my $nl = &read_line(0, 1);
|
|
if ($nl eq '') {
|
|
# End of socket
|
|
print STDERR "finished reading - shutting down socket\n";
|
|
shutdown(SOCK, 0);
|
|
}
|
|
$line .= $nl if (defined($nl));
|
|
return $line;
|
|
}
|
|
}
|
|
|
|
# Read one character of input
|
|
sub GETC
|
|
{
|
|
my $r = shift;
|
|
my $buf;
|
|
my $got = READ($r, \$buf, 1, 0);
|
|
return $got > 0 ? $buf : undef;
|
|
}
|
|
|
|
sub FILENO
|
|
{
|
|
return fileno(SOCK);
|
|
}
|
|
|
|
sub CLOSE { }
|
|
|
|
sub DESTROY { }
|
|
|
|
# write_to_sock(data, ...)
|
|
sub write_to_sock
|
|
{
|
|
local $d;
|
|
foreach $d (@_) {
|
|
if ($doneheaders || $miniserv::nph_script) {
|
|
&write_data($d);
|
|
}
|
|
else {
|
|
$headers .= $d;
|
|
while(!$doneheaders && $headers =~ s/^([^\r\n]*)(\r)?\n//) {
|
|
if ($1 =~ /^(\S+):\s+(.*)$/) {
|
|
$cgiheader{lc($1)} = $2;
|
|
push(@cgiheader, [ $1, $2 ]);
|
|
}
|
|
elsif ($1 !~ /\S/) {
|
|
$doneheaders++;
|
|
}
|
|
else {
|
|
&http_error(500, "Bad Header");
|
|
}
|
|
}
|
|
if ($doneheaders) {
|
|
if ($cgiheader{"location"}) {
|
|
&write_data(
|
|
"HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{server}\r\n");
|
|
&write_keep_alive(0);
|
|
}
|
|
elsif ($cgiheader{"content-type"} eq "") {
|
|
&http_error(500, "Missing Content-Type Header");
|
|
}
|
|
else {
|
|
&write_data("HTTP/1.0 $ok_code $ok_message\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{server}\r\n");
|
|
&write_keep_alive(0);
|
|
}
|
|
foreach $h (@cgiheader) {
|
|
&write_data("$h->[0]: $h->[1]\r\n");
|
|
}
|
|
&write_data("\r\n");
|
|
&reset_byte_count();
|
|
&write_data($headers);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
sub verify_client
|
|
{
|
|
local $cert = Net::SSLeay::X509_STORE_CTX_get_current_cert($_[1]);
|
|
if ($cert) {
|
|
local $errnum = Net::SSLeay::X509_STORE_CTX_get_error($_[1]);
|
|
$verified_client = 1 if (!$errnum);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
sub END
|
|
{
|
|
if ($doing_eval && $$ == $main_process_id) {
|
|
# A CGI program called exit! This is a horrible hack to
|
|
# finish up before really exiting
|
|
shutdown(SOCK, 1);
|
|
close(SOCK);
|
|
close($PASSINw); close($PASSOUTw);
|
|
&log_request($acpthost, $authuser, $reqline,
|
|
$cgiheader{"location"} ? "302" : $ok_code, &byte_count());
|
|
}
|
|
}
|
|
|
|
# urlize
|
|
# Convert a string to a form ok for putting in a URL
|
|
sub urlize {
|
|
local($tmp, $tmp2, $c);
|
|
$tmp = $_[0];
|
|
$tmp2 = "";
|
|
while(($c = chop($tmp)) ne "") {
|
|
if ($c !~ /[A-z0-9]/) {
|
|
$c = sprintf("%%%2.2X", ord($c));
|
|
}
|
|
$tmp2 = $c . $tmp2;
|
|
}
|
|
return $tmp2;
|
|
}
|
|
|
|
# validate_user(username, password, host)
|
|
# Checks if some username and password are valid. Returns the modified username,
|
|
# the expired flag, and the non-existence flag
|
|
sub validate_user
|
|
{
|
|
local ($user, $pass, $host) = @_;
|
|
return ( ) if (!$user);
|
|
print DEBUG "validate_user: user=$user pass=$pass host=$host\n";
|
|
local ($canuser, $canmode, $notexist, $webminuser, $sudo) =
|
|
&can_user_login($user, undef, $host);
|
|
print DEBUG "validate_user: canuser=$canuser canmode=$canmode notexist=$notexist webminuser=$webminuser sudo=$sudo\n";
|
|
if ($notexist) {
|
|
# User doesn't even exist, so go no further
|
|
return ( undef, 0, 1 );
|
|
}
|
|
elsif ($canmode == 0) {
|
|
# User does exist but cannot login
|
|
return ( $canuser, 0, 0 );
|
|
}
|
|
elsif ($canmode == 1) {
|
|
# Attempt Webmin authentication
|
|
if ($users{$webminuser} eq &unix_crypt($pass, $users{$webminuser})) {
|
|
# Password is valid .. but check for expiry
|
|
local $lc = $lastchanges{$user};
|
|
if ($config{'pass_maxdays'} && $lc) {
|
|
local $daysold = (time() - $lc)/(24*60*60);
|
|
print DEBUG "maxdays=$config{'pass_maxdays'} daysold=$daysold\n";
|
|
if ($config{'pass_lockdays'} &&
|
|
$daysold > $config{'pass_lockdays'}) {
|
|
# So old that the account is locked
|
|
return ( undef, 0, 0 );
|
|
}
|
|
elsif ($daysold > $config{'pass_maxdays'}) {
|
|
# Password has expired
|
|
return ( $user, 1, 0 );
|
|
}
|
|
}
|
|
return ( $user, 0, 0 );
|
|
}
|
|
else {
|
|
return ( undef, 0, 0 );
|
|
}
|
|
}
|
|
elsif ($canmode == 2 || $canmode == 3) {
|
|
# Attempt PAM or passwd file authentication
|
|
local $val = &validate_unix_user($canuser, $pass);
|
|
print DEBUG "validate_user: unix val=$val\n";
|
|
if ($val && $sudo) {
|
|
# Need to check if this Unix user can sudo
|
|
if (!&check_sudo_permissions($canuser, $pass)) {
|
|
print DEBUG "validate_user: sudo failed\n";
|
|
$val = 0;
|
|
}
|
|
else {
|
|
print DEBUG "validate_user: sudo passed\n";
|
|
}
|
|
}
|
|
return $val == 2 ? ( $canuser, 1, 0 ) :
|
|
$val == 1 ? ( $canuser, 0, 0 ) : ( undef, 0, 0 );
|
|
}
|
|
elsif ($canmode == 4) {
|
|
# Attempt external authentication
|
|
return &validate_external_user($canuser, $pass) ?
|
|
( $canuser, 0, 0 ) : ( undef, 0, 0 );
|
|
}
|
|
else {
|
|
# Can't happen!
|
|
return ( );
|
|
}
|
|
}
|
|
|
|
# validate_unix_user(user, password)
|
|
# Returns 1 if a username and password are valid under unix, 0 if not,
|
|
# or 2 if the account has expired.
|
|
# Checks PAM if available, and falls back to reading the system password
|
|
# file otherwise.
|
|
sub validate_unix_user
|
|
{
|
|
if ($use_pam) {
|
|
# Check with PAM
|
|
$pam_username = $_[0];
|
|
$pam_password = $_[1];
|
|
local $pamh = new Authen::PAM($config{'pam'}, $pam_username,
|
|
\&pam_conv_func);
|
|
if (ref($pamh)) {
|
|
local $pam_ret = $pamh->pam_authenticate();
|
|
if ($pam_ret == PAM_SUCCESS()) {
|
|
# Logged in OK .. make sure password hasn't expired
|
|
local $acct_ret = $pamh->pam_acct_mgmt();
|
|
if ($acct_ret == PAM_SUCCESS()) {
|
|
$pamh->pam_open_session();
|
|
return 1;
|
|
}
|
|
elsif ($acct_ret == PAM_NEW_AUTHTOK_REQD() ||
|
|
$acct_ret == PAM_ACCT_EXPIRED()) {
|
|
return 2;
|
|
}
|
|
else {
|
|
print STDERR "Unknown pam_acct_mgmt return value : $acct_ret\n";
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
elsif ($config{'pam_only'}) {
|
|
# Pam is not available, but configuration forces it's use!
|
|
return 0;
|
|
}
|
|
elsif ($config{'passwd_file'}) {
|
|
# Check in a password file
|
|
local $rv = 0;
|
|
open(FILE, $config{'passwd_file'});
|
|
if ($config{'passwd_file'} eq '/etc/security/passwd') {
|
|
# Assume in AIX format
|
|
while(<FILE>) {
|
|
s/\s*$//;
|
|
if (/^\s*(\S+):/ && $1 eq $_[0]) {
|
|
$_ = <FILE>;
|
|
if (/^\s*password\s*=\s*(\S+)\s*$/) {
|
|
$rv = $1 eq &unix_crypt($_[1], $1) ? 1 : 0;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
# Read the system password or shadow file
|
|
while(<FILE>) {
|
|
local @l = split(/:/, $_, -1);
|
|
local $u = $l[$config{'passwd_uindex'}];
|
|
local $p = $l[$config{'passwd_pindex'}];
|
|
if ($u eq $_[0]) {
|
|
$rv = $p eq &unix_crypt($_[1], $p) ? 1 : 0;
|
|
if ($config{'passwd_cindex'} ne '' && $rv) {
|
|
# Password may have expired!
|
|
local $c = $l[$config{'passwd_cindex'}];
|
|
local $m = $l[$config{'passwd_mindex'}];
|
|
local $day = time()/(24*60*60);
|
|
if ($c =~ /^\d+/ && $m =~ /^\d+/ &&
|
|
$day - $c > $m) {
|
|
# Yep, it has ..
|
|
$rv = 2;
|
|
}
|
|
}
|
|
if ($p eq "" && $config{'passwd_blank'}) {
|
|
# Force password change
|
|
$rv = 2;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
close(FILE);
|
|
return $rv if ($rv);
|
|
}
|
|
|
|
# Fallback option - check password returned by getpw*
|
|
local @uinfo = getpwnam($_[0]);
|
|
if ($uinfo[1] ne '' && &unix_crypt($_[1], $uinfo[1]) eq $uinfo[1]) {
|
|
return 1;
|
|
}
|
|
|
|
return 0; # Totally failed
|
|
}
|
|
|
|
# validate_external_user(user, pass)
|
|
# Validate a user by passing the username and password to an external
|
|
# squid-style authentication program
|
|
sub validate_external_user
|
|
{
|
|
return 0 if (!$config{'extauth'});
|
|
flock(EXTAUTH, 2);
|
|
local $str = "$_[0] $_[1]\n";
|
|
syswrite(EXTAUTH, $str, length($str));
|
|
local $resp = <EXTAUTH>;
|
|
flock(EXTAUTH, 8);
|
|
return $resp =~ /^OK/i ? 1 : 0;
|
|
}
|
|
|
|
# can_user_login(username, no-append, host)
|
|
# Checks if a user can login or not.
|
|
# First return value is the username.
|
|
# Second is 0 if cannot login, 1 if using Webmin pass, 2 if PAM, 3 if password
|
|
# file, 4 if external.
|
|
# Third is 1 if the user does not exist at all, 0 if he does.
|
|
# Fourth is the Webmin username whose permissions apply, based on unixauth.
|
|
# Fifth is a flag indicating if a sudo check is needed.
|
|
sub can_user_login
|
|
{
|
|
if (!$users{$_[0]}) {
|
|
# See if this user exists in Unix and can be validated by the same
|
|
# method as the unixauth webmin user
|
|
local $realuser = $unixauth{$_[0]};
|
|
local @uinfo;
|
|
local $sudo = 0;
|
|
local $pamany = 0;
|
|
eval { @uinfo = getpwnam($_[0]); }; # may fail on windows
|
|
if (!$realuser && @uinfo) {
|
|
# No unixauth entry for the username .. try his groups
|
|
foreach my $ua (keys %unixauth) {
|
|
if ($ua =~ /^\@(.*)$/) {
|
|
if (&is_group_member(\@uinfo, $1)) {
|
|
$realuser = $unixauth{$ua};
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!$realuser && @uinfo) {
|
|
# Fall back to unix auth for all Unix users
|
|
$realuser = $unixauth{"*"};
|
|
}
|
|
if (!$realuser && $use_sudo && @uinfo) {
|
|
# Allow login effectively as root, if sudo permits it
|
|
$sudo = 1;
|
|
$realuser = "root";
|
|
}
|
|
if (!$realuser && !@uinfo && $config{'pamany'}) {
|
|
# If the user completely doesn't exist, we can still allow
|
|
# him to authenticate via PAM
|
|
$realuser = $config{'pamany'};
|
|
$pamany = 1;
|
|
}
|
|
if (!$realuser) {
|
|
# For Usermin, always fall back to unix auth for any user,
|
|
# so that later checks with domain added / removed are done.
|
|
$realuser = $unixauth{"*"};
|
|
}
|
|
return (undef, 0, 1, undef) if (!$realuser);
|
|
local $up = $users{$realuser};
|
|
return (undef, 0, 1, undef) if (!defined($up));
|
|
|
|
# Work out possible domain names from the hostname
|
|
local @doms = ( $_[2] );
|
|
if ($_[2] =~ /^([^\.]+)\.(\S+)$/) {
|
|
push(@doms, $2);
|
|
}
|
|
|
|
if ($config{'user_mapping'} && !defined(%user_mapping)) {
|
|
# Read the user mapping file
|
|
%user_mapping = ();
|
|
open(MAPPING, $config{'user_mapping'});
|
|
while(<MAPPING>) {
|
|
s/\r|\n//g;
|
|
s/#.*$//;
|
|
if (/^(\S+)\s+(\S+)/) {
|
|
if ($config{'user_mapping_reverse'}) {
|
|
$user_mapping{$1} = $2;
|
|
}
|
|
else {
|
|
$user_mapping{$2} = $1;
|
|
}
|
|
}
|
|
}
|
|
close(MAPPING);
|
|
}
|
|
|
|
# Check the user mapping file to see if there is an entry for the
|
|
# user login in which specifies a new effective user
|
|
local $um;
|
|
foreach my $d (@doms) {
|
|
$um ||= $user_mapping{"$_[0]\@$d"};
|
|
}
|
|
$um ||= $user_mapping{$_[0]};
|
|
if (defined($um) && ($_[1]&4) == 0) {
|
|
# A mapping exists - use it!
|
|
return &can_user_login($um, $_[1]+4, $_[2]);
|
|
}
|
|
|
|
# Check if a user with the entered login and the domains appended
|
|
# or prepended exists, and if so take it to be the effective user
|
|
if (!@uinfo && $config{'domainuser'}) {
|
|
# Try again with name.domain and name.firstpart
|
|
local @firsts = map { /^([^\.]+)/; $1 } @doms;
|
|
if (($_[1]&1) == 0) {
|
|
local ($a, $p);
|
|
foreach $a (@firsts, @doms) {
|
|
foreach $p ("$_[0].${a}", "$_[0]-${a}",
|
|
"${a}.$_[0]", "${a}-$_[0]",
|
|
"$_[0]_${a}", "${a}_$_[0]") {
|
|
local @vu = &can_user_login(
|
|
$p, $_[1]+1, $_[2]);
|
|
return @vu if ($vu[1]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Check if the user entered a domain at the end of his username when
|
|
# he really shouldn't have, and if so try without it
|
|
if (!@uinfo && $config{'domainstrip'} &&
|
|
$_[0] =~ /^(\S+)\@(\S+)$/ && ($_[1]&2) == 0) {
|
|
local ($stripped, $dom) = ($1, $2);
|
|
local @vu = &can_user_login($stripped, $_[1] + 2, $_[2]);
|
|
return @vu if ($vu[1]);
|
|
local @vu = &can_user_login($stripped, $_[1] + 2, $dom);
|
|
return @vu if ($vu[1]);
|
|
}
|
|
|
|
return ( undef, 0, 1, undef ) if (!@uinfo && !$pamany);
|
|
|
|
if (@uinfo) {
|
|
if (defined(@allowusers)) {
|
|
# Only allow people on the allow list
|
|
return ( undef, 0, 0, undef )
|
|
if (!&users_match(\@uinfo, @allowusers));
|
|
}
|
|
elsif (defined(@denyusers)) {
|
|
# Disallow people on the deny list
|
|
return ( undef, 0, 0, undef )
|
|
if (&users_match(\@uinfo, @denyusers));
|
|
}
|
|
if ($config{'shells_deny'}) {
|
|
local $found = 0;
|
|
open(SHELLS, $config{'shells_deny'});
|
|
while(<SHELLS>) {
|
|
s/\r|\n//g;
|
|
s/#.*$//;
|
|
$found++ if ($_ eq $uinfo[8]);
|
|
}
|
|
close(SHELLS);
|
|
return ( undef, 0, 0, undef ) if (!$found);
|
|
}
|
|
}
|
|
|
|
if ($up eq 'x') {
|
|
# PAM or passwd file authentication
|
|
return ( $_[0], $use_pam ? 2 : 3, 0, $realuser, $sudo );
|
|
}
|
|
elsif ($up eq 'e') {
|
|
# External authentication
|
|
return ( $_[0], 4, 0, $realuser, $sudo );
|
|
}
|
|
else {
|
|
# Fixed Webmin password
|
|
return ( $_[0], 1, 0, $realuser, $sudo );
|
|
}
|
|
}
|
|
elsif ($users{$_[0]} eq 'x') {
|
|
# Webmin user authenticated via PAM or password file
|
|
return ( $_[0], $use_pam ? 2 : 3, 0, $_[0] );
|
|
}
|
|
elsif ($users{$_[0]} eq 'e') {
|
|
# Webmin user authenticated externally
|
|
return ( $_[0], 4, 0, $_[0] );
|
|
}
|
|
else {
|
|
# Normal Webmin user
|
|
return ( $_[0], 1, 0, $_[0] );
|
|
}
|
|
}
|
|
|
|
# the PAM conversation function for interactive logins
|
|
sub pam_conv_func
|
|
{
|
|
$pam_conv_func_called++;
|
|
my @res;
|
|
while ( @_ ) {
|
|
my $code = shift;
|
|
my $msg = shift;
|
|
my $ans = "";
|
|
|
|
$ans = $pam_username if ($code == PAM_PROMPT_ECHO_ON() );
|
|
$ans = $pam_password if ($code == PAM_PROMPT_ECHO_OFF() );
|
|
|
|
push @res, PAM_SUCCESS();
|
|
push @res, $ans;
|
|
}
|
|
push @res, PAM_SUCCESS();
|
|
return @res;
|
|
}
|
|
|
|
sub urandom_timeout
|
|
{
|
|
close(RANDOM);
|
|
}
|
|
|
|
# get_socket_name(handle)
|
|
# Returns the local hostname or IP address of some connection
|
|
sub get_socket_name
|
|
{
|
|
return $config{'host'} if ($config{'host'});
|
|
local $sn = getsockname($_[0]);
|
|
return undef if (!$sn);
|
|
local $myaddr = (unpack_sockaddr_in($sn))[1];
|
|
if (!$get_socket_name_cache{$myaddr}) {
|
|
local $myname;
|
|
if (!$config{'no_resolv_myname'}) {
|
|
$myname = gethostbyaddr($myaddr, AF_INET);
|
|
}
|
|
if ($myname eq "") {
|
|
$myname = inet_ntoa($myaddr);
|
|
}
|
|
$get_socket_name_cache{$myaddr} = $myname;
|
|
}
|
|
return $get_socket_name_cache{$myaddr};
|
|
}
|
|
|
|
# run_login_script(username, sid, remoteip, localip)
|
|
sub run_login_script
|
|
{
|
|
if ($config{'login_script'}) {
|
|
system($config{'login_script'}.
|
|
" ".join(" ", map { quotemeta($_) } @_).
|
|
" >/dev/null 2>&1 </dev/null");
|
|
}
|
|
}
|
|
|
|
# run_logout_script(username, sid, remoteip, localip)
|
|
sub run_logout_script
|
|
{
|
|
if ($config{'logout_script'}) {
|
|
system($config{'logout_script'}.
|
|
" ".join(" ", map { quotemeta($_) } @_).
|
|
" >/dev/null 2>&1 </dev/null");
|
|
}
|
|
}
|
|
|
|
# close_all_sockets()
|
|
# Closes all the main listening sockets
|
|
sub close_all_sockets
|
|
{
|
|
local $s;
|
|
foreach $s (@socketfhs) {
|
|
close($s);
|
|
}
|
|
}
|
|
|
|
# close_all_pipes()
|
|
# Close all pipes for talking to sub-processes
|
|
sub close_all_pipes
|
|
{
|
|
local $p;
|
|
foreach $p (@passin) { close($p); }
|
|
foreach $p (@passout) { close($p); }
|
|
foreach $p (values %conversations) {
|
|
if ($p->{'PAMOUTr'}) {
|
|
close($p->{'PAMOUTr'});
|
|
close($p->{'PAMINw'});
|
|
}
|
|
}
|
|
}
|
|
|
|
# check_user_ip(user)
|
|
# Returns 1 if some user is allowed to login from the accepting IP, 0 if not
|
|
sub check_user_ip
|
|
{
|
|
if ($deny{$_[0]} &&
|
|
&ip_match($acptip, $localip, @{$deny{$_[0]}}) ||
|
|
$allow{$_[0]} &&
|
|
!&ip_match($acptip, $localip, @{$allow{$_[0]}})) {
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
# check_user_time(user)
|
|
# Returns 1 if some user is allowed to login at the current date and time
|
|
sub check_user_time
|
|
{
|
|
return 1 if (!$allowdays{$_[0]} && !$allowhours{$_[0]});
|
|
local @tm = localtime(time());
|
|
if ($allowdays{$_[0]}) {
|
|
# Make sure day is allowed
|
|
return 0 if (&indexof($tm[6], @{$allowdays{$_[0]}}) < 0);
|
|
}
|
|
if ($allowhours{$_[0]}) {
|
|
# Make sure time is allowed
|
|
local $m = $tm[2]*60+$tm[1];
|
|
return 0 if ($m < $allowhours{$_[0]}->[0] ||
|
|
$m > $allowhours{$_[0]}->[1]);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
# generate_random_id(password, [force-urandom])
|
|
# Returns a random session ID number
|
|
sub generate_random_id
|
|
{
|
|
local ($pass, $force_urandom) = @_;
|
|
local $sid;
|
|
if (!$bad_urandom) {
|
|
# First try /dev/urandom, unless we have marked it as bad
|
|
$SIG{ALRM} = "miniserv::urandom_timeout";
|
|
alarm(5);
|
|
if (open(RANDOM, "/dev/urandom")) {
|
|
my $tmpsid;
|
|
if (read(RANDOM, $tmpsid, 16) == 16) {
|
|
$sid = lc(unpack('h*',$tmpsid));
|
|
}
|
|
close(RANDOM);
|
|
}
|
|
alarm(0);
|
|
}
|
|
if (!$sid && !$force_urandom) {
|
|
$sid = time();
|
|
local $mul = 1;
|
|
foreach $c (split(//, &unix_crypt($pass, substr($$, -2)))) {
|
|
$sid += ord($c) * $mul;
|
|
$mul *= 3;
|
|
}
|
|
}
|
|
return $sid;
|
|
}
|
|
|
|
# handle_login(username, ok, expired, not-exists, password)
|
|
# Called from handle_session to either mark a user as logged in, or not
|
|
sub handle_login
|
|
{
|
|
local ($vu, $ok, $expired, $nonexist, $pass) = @_;
|
|
$authuser = $vu if ($ok);
|
|
|
|
# check if the test cookie is set
|
|
if ($header{'cookie'} !~ /testing=1/ && $vu &&
|
|
!$config{'no_testing_cookie'}) {
|
|
&http_error(500, "No cookies",
|
|
"Your browser does not support cookies, ".
|
|
"which are required for this web server to ".
|
|
"work in session authentication mode");
|
|
}
|
|
|
|
# check with main process for delay
|
|
if ($config{'passdelay'} && $vu) {
|
|
print $PASSINw "delay $vu $acptip $ok\n";
|
|
<$PASSOUTr> =~ /(\d+) (\d+)/;
|
|
$blocked = $2;
|
|
sleep($1);
|
|
}
|
|
|
|
if ($ok && (!$expired ||
|
|
$config{'passwd_mode'} == 1)) {
|
|
# Logged in OK! Tell the main process about
|
|
# the new SID
|
|
local $sid = &generate_random_id($pass);
|
|
print $PASSINw "new $sid $authuser $acptip\n";
|
|
|
|
# Run the post-login script, if any
|
|
&run_login_script($authuser, $sid,
|
|
$acptip, $localip);
|
|
|
|
# Check for a redirect URL for the user
|
|
local $rurl = &login_redirect($authuser, $pass, $host);
|
|
if ($rurl) {
|
|
# Got one .. go to it
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
&write_data("Location: $rurl\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&log_request($acpthost, $authuser, $reqline, 302, 0);
|
|
}
|
|
else {
|
|
# Set cookie and redirect to originally requested page
|
|
&write_data("HTTP/1.0 302 Moved Temporarily\r\n");
|
|
&write_data("Date: $datestr\r\n");
|
|
&write_data("Server: $config{'server'}\r\n");
|
|
local $ssl = $use_ssl || $config{'inetd_ssl'};
|
|
$portstr = $port == 80 && !$ssl ? "" :
|
|
$port == 443 && $ssl ? "" : ":$port";
|
|
$prot = $ssl ? "https" : "http";
|
|
local $sec = $ssl ? "; secure" : "";
|
|
#$sec .= "; httpOnly";
|
|
if ($in{'save'}) {
|
|
&write_data("Set-Cookie: $sidname=$sid; path=/; expires=\"Thu, 31-Dec-2037 00:00:00\"$sec\r\n");
|
|
}
|
|
else {
|
|
&write_data("Set-Cookie: $sidname=$sid; path=/$sec\r\n");
|
|
}
|
|
&write_data("Location: $prot://$host$portstr$in{'page'}\r\n");
|
|
&write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&log_request($acpthost, $authuser, $reqline, 302, 0);
|
|
syslog("info", "%s", "Successful login as $authuser from $acpthost") if ($use_syslog);
|
|
&write_login_utmp($authuser, $acpthost);
|
|
}
|
|
return 0;
|
|
}
|
|
elsif ($ok && $expired &&
|
|
$config{'passwd_mode'} == 2) {
|
|
# Login was ok, but password has expired. Need
|
|
# to force display of password change form.
|
|
$validated = 1;
|
|
$authuser = undef;
|
|
$querystring = "&user=".&urlize($vu).
|
|
"&pam=".$use_pam;
|
|
$method = "GET";
|
|
$queryargs = "";
|
|
$page = $config{'password_form'};
|
|
$logged_code = 401;
|
|
$miniserv_internal = 2;
|
|
syslog("crit", "%s",
|
|
"Expired login as $vu ".
|
|
"from $acpthost") if ($use_syslog);
|
|
}
|
|
else {
|
|
# Login failed, or password has expired. The login form will be
|
|
# displayed again by later code
|
|
$failed_user = $vu;
|
|
$request_uri = $in{'page'};
|
|
$already_session_id = undef;
|
|
$method = "GET";
|
|
$authuser = $baseauthuser = undef;
|
|
syslog("crit", "%s",
|
|
($nonexist ? "Non-existent" :
|
|
$expired ? "Expired" : "Invalid").
|
|
" login as $vu from $acpthost")
|
|
if ($use_syslog);
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
# write_login_utmp(user, host)
|
|
# Record the login by some user in utmp
|
|
sub write_login_utmp
|
|
{
|
|
if ($write_utmp) {
|
|
# Write utmp record for login
|
|
%utmp = ( 'ut_host' => $_[1],
|
|
'ut_time' => time(),
|
|
'ut_user' => $_[0],
|
|
'ut_type' => 7, # user process
|
|
'ut_pid' => $main_process_id,
|
|
'ut_line' => $config{'pam'},
|
|
'ut_id' => '' );
|
|
if (defined(&User::Utmp::putut)) {
|
|
User::Utmp::putut(\%utmp);
|
|
}
|
|
else {
|
|
User::Utmp::pututline(\%utmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
# write_logout_utmp(user, host)
|
|
sub write_logout_utmp
|
|
{
|
|
if ($write_utmp) {
|
|
# Write utmp record for logout
|
|
%utmp = ( 'ut_host' => $_[1],
|
|
'ut_time' => time(),
|
|
'ut_user' => $_[0],
|
|
'ut_type' => 8, # dead process
|
|
'ut_pid' => $main_process_id,
|
|
'ut_line' => $config{'pam'},
|
|
'ut_id' => '' );
|
|
if (defined(&User::Utmp::putut)) {
|
|
User::Utmp::putut(\%utmp);
|
|
}
|
|
else {
|
|
User::Utmp::pututline(\%utmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
# pam_conversation_process(username, write-pipe, read-pipe)
|
|
# This function is called inside a sub-process to communicate with PAM. It sends
|
|
# questions down one pipe, and reads responses from another
|
|
sub pam_conversation_process
|
|
{
|
|
local ($user, $writer, $reader) = @_;
|
|
$miniserv::pam_conversation_process_writer = $writer;
|
|
$miniserv::pam_conversation_process_reader = $reader;
|
|
local $convh = new Authen::PAM(
|
|
$config{'pam'}, $user, \&miniserv::pam_conversation_process_func);
|
|
local $pam_ret = $convh->pam_authenticate();
|
|
if ($pam_ret == PAM_SUCCESS()) {
|
|
local $acct_ret = $convh->pam_acct_mgmt();
|
|
if ($acct_ret == PAM_SUCCESS()) {
|
|
$convh->pam_open_session();
|
|
print $writer "x2 $user 1 0 0\n";
|
|
}
|
|
elsif ($acct_ret == PAM_NEW_AUTHTOK_REQD() ||
|
|
$acct_ret == PAM_ACCT_EXPIRED()) {
|
|
print $writer "x2 $user 1 1 0\n";
|
|
}
|
|
else {
|
|
print $writer "x0 Unknown PAM account status $acct_ret\n";
|
|
}
|
|
}
|
|
else {
|
|
print $writer "x2 $user 0 0 0\n";
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
# pam_conversation_process_func(type, message, [type, message, ...])
|
|
# A pipe that talks to both PAM and the master process
|
|
sub pam_conversation_process_func
|
|
{
|
|
local @rv;
|
|
select($miniserv::pam_conversation_process_writer); $| = 1; select(STDOUT);
|
|
while(@_) {
|
|
local ($type, $msg) = (shift, shift);
|
|
$msg =~ s/\r|\n//g;
|
|
local $ok = (print $miniserv::pam_conversation_process_writer "$type $msg\n");
|
|
print $miniserv::pam_conversation_process_writer "\n";
|
|
local $answer = <$miniserv::pam_conversation_process_reader>;
|
|
$answer =~ s/\r|\n//g;
|
|
push(@rv, PAM_SUCCESS(), $answer);
|
|
}
|
|
push(@rv, PAM_SUCCESS());
|
|
return @rv;
|
|
}
|
|
|
|
# allocate_pipes()
|
|
# Returns 4 new pipe file handles
|
|
sub allocate_pipes
|
|
{
|
|
local ($PASSINr, $PASSINw, $PASSOUTr, $PASSOUTw);
|
|
local $p;
|
|
local %taken = ( (map { $_, 1 } @passin),
|
|
(map { $_->{'PASSINr'} } values %conversations) );
|
|
for($p=0; $taken{"PASSINr$p"}; $p++) { }
|
|
$PASSINr = "PASSINr$p";
|
|
$PASSINw = "PASSINw$p";
|
|
$PASSOUTr = "PASSOUTr$p";
|
|
$PASSOUTw = "PASSOUTw$p";
|
|
pipe($PASSINr, $PASSINw);
|
|
pipe($PASSOUTr, $PASSOUTw);
|
|
select($PASSINw); $| = 1;
|
|
select($PASSINr); $| = 1;
|
|
select($PASSOUTw); $| = 1;
|
|
select($PASSOUTw); $| = 1;
|
|
select(STDOUT);
|
|
return ($PASSINr, $PASSINw, $PASSOUTr, $PASSOUTw);
|
|
}
|
|
|
|
# recv_pam_question(&conv, fd)
|
|
# Reads one PAM question from the sub-process, and sends it to the HTTP handler.
|
|
# Returns 0 if the conversation is over, 1 if not.
|
|
sub recv_pam_question
|
|
{
|
|
local ($conf, $fh) = @_;
|
|
local $pr = $conf->{'PAMOUTr'};
|
|
select($pr); $| = 1; select(STDOUT);
|
|
local $line = <$pr>;
|
|
$line =~ s/\r|\n//g;
|
|
if (!$line) {
|
|
$line = <$pr>;
|
|
$line =~ s/\r|\n//g;
|
|
}
|
|
$conf->{'last'} = time();
|
|
if (!$line) {
|
|
# Failed!
|
|
print $fh "0 PAM conversation error\n";
|
|
return 0;
|
|
}
|
|
else {
|
|
local ($type, $msg) = split(/\s+/, $line, 2);
|
|
if ($type =~ /^x(\d+)/) {
|
|
# Pass this status code through
|
|
print $fh "$1 $msg\n";
|
|
return $1 == 2 || $1 == 0 ? 0 : 1;
|
|
}
|
|
elsif ($type == PAM_PROMPT_ECHO_ON()) {
|
|
# A normal question
|
|
print $fh "1 $msg\n";
|
|
return 1;
|
|
}
|
|
elsif ($type == PAM_PROMPT_ECHO_OFF()) {
|
|
# A password
|
|
print $fh "3 $msg\n";
|
|
return 1;
|
|
}
|
|
elsif ($type == PAM_ERROR_MSG() || $type == PAM_TEXT_INFO()) {
|
|
# A message that does not require a response
|
|
print $fh "4 $msg\n";
|
|
return 1;
|
|
}
|
|
else {
|
|
# Unknown type!
|
|
print $fh "0 Unknown PAM message type $type\n";
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
# send_pam_answer(&conv, answer)
|
|
# Sends a response from the user to the PAM sub-process
|
|
sub send_pam_answer
|
|
{
|
|
local ($conf, $answer) = @_;
|
|
local $pw = $conf->{'PAMINw'};
|
|
$conf->{'last'} = time();
|
|
print $pw "$answer\n";
|
|
}
|
|
|
|
# end_pam_conversation(&conv)
|
|
# Clean up PAM conversation pipes and processes
|
|
sub end_pam_conversation
|
|
{
|
|
local ($conv) = @_;
|
|
kill('KILL', $conv->{'pid'}) if ($conv->{'pid'});
|
|
if ($conv->{'PAMINr'}) {
|
|
close($conv->{'PAMINr'});
|
|
close($conv->{'PAMOUTr'});
|
|
close($conv->{'PAMINw'});
|
|
close($conv->{'PAMOUTw'});
|
|
}
|
|
delete($conversations{$conv->{'cid'}});
|
|
}
|
|
|
|
# get_ipkeys(&miniserv)
|
|
# Returns a list of IP address to key file mappings from a miniserv.conf entry
|
|
sub get_ipkeys
|
|
{
|
|
local (@rv, $k);
|
|
foreach $k (keys %{$_[0]}) {
|
|
if ($k =~ /^ipkey_(\S+)/) {
|
|
local $ipkey = { 'ips' => [ split(/,/, $1) ],
|
|
'key' => $_[0]->{$k},
|
|
'index' => scalar(@rv) };
|
|
$ipkey->{'cert'} = $_[0]->{'ipcert_'.$1};
|
|
push(@rv, $ipkey);
|
|
}
|
|
}
|
|
return @rv;
|
|
}
|
|
|
|
# create_ssl_context(keyfile, [certfile])
|
|
sub create_ssl_context
|
|
{
|
|
local ($keyfile, $certfile) = @_;
|
|
local $ssl_ctx;
|
|
eval { $ssl_ctx = Net::SSLeay::new_x_ctx() };
|
|
$ssl_ctx ||= Net::SSLeay::CTX_new();
|
|
$ssl_ctx || die "Failed to create SSL context : $!";
|
|
if ($client_certs) {
|
|
Net::SSLeay::CTX_load_verify_locations(
|
|
$ssl_ctx, $config{'ca'}, "");
|
|
Net::SSLeay::CTX_set_verify(
|
|
$ssl_ctx, &Net::SSLeay::VERIFY_PEER, \&verify_client);
|
|
}
|
|
if ($config{'extracas'}) {
|
|
local $p;
|
|
foreach $p (split(/\s+/, $config{'extracas'})) {
|
|
Net::SSLeay::CTX_load_verify_locations(
|
|
$ssl_ctx, $p, "");
|
|
}
|
|
}
|
|
|
|
Net::SSLeay::CTX_use_RSAPrivateKey_file(
|
|
$ssl_ctx, $keyfile,
|
|
&Net::SSLeay::FILETYPE_PEM) || die "Failed to open SSL key $keyfile";
|
|
Net::SSLeay::CTX_use_certificate_file(
|
|
$ssl_ctx, $certfile || $keyfile,
|
|
&Net::SSLeay::FILETYPE_PEM) || die "Failed to open SSL cert $certfile";
|
|
|
|
return $ssl_ctx;
|
|
}
|
|
|
|
# ssl_connection_for_ip(socket)
|
|
# Returns a new SSL connection object for some socket, or undef if failed
|
|
sub ssl_connection_for_ip
|
|
{
|
|
local ($sock) = @_;
|
|
local $sn = getsockname($sock);
|
|
if (!$sn) {
|
|
print STDERR "Failed to get address for socket $sock\n";
|
|
return undef;
|
|
}
|
|
local $myip = inet_ntoa((unpack_sockaddr_in($sn))[1]);
|
|
local $ssl_ctx = $ssl_contexts{$myip} || $ssl_contexts{"*"};
|
|
local $ssl_con = Net::SSLeay::new($ssl_ctx);
|
|
Net::SSLeay::set_fd($ssl_con, fileno($sock));
|
|
if (!Net::SSLeay::accept($ssl_con)) {
|
|
print STDERR "Failed to initialize SSL connection\n";
|
|
return undef;
|
|
}
|
|
return $ssl_con;
|
|
}
|
|
|
|
# login_redirect(username, password, host)
|
|
# Calls the login redirect script (if configured), which may output a URL to
|
|
# re-direct a user to after logging in.
|
|
sub login_redirect
|
|
{
|
|
return undef if (!$config{'login_redirect'});
|
|
local $quser = quotemeta($_[0]);
|
|
local $qpass = quotemeta($_[1]);
|
|
local $qhost = quotemeta($_[2]);
|
|
local $url = `$config{'login_redirect'} $quser $qpass $qhost`;
|
|
chop($url);
|
|
return $url;
|
|
}
|
|
|
|
# reload_config_file()
|
|
# Re-read %config, and call post-config actions
|
|
sub reload_config_file
|
|
{
|
|
&log_error("Reloading configuration");
|
|
%config = &read_config_file($config_file);
|
|
&update_vital_config();
|
|
&read_users_file();
|
|
&read_mime_types();
|
|
&build_config_mappings();
|
|
if ($config{'session'}) {
|
|
dbmclose(%sessiondb);
|
|
dbmopen(%sessiondb, $config{'sessiondb'}, 0700);
|
|
}
|
|
}
|
|
|
|
# read_config_file(file)
|
|
# Reads the given config file, and returns a hash of values
|
|
sub read_config_file
|
|
{
|
|
local %rv;
|
|
open(CONF, $_[0]) || die "Failed to open config file $_[0] : $!";
|
|
while(<CONF>) {
|
|
s/\r|\n//g;
|
|
if (/^#/ || !/\S/) { next; }
|
|
/^([^=]+)=(.*)$/;
|
|
$name = $1; $val = $2;
|
|
$name =~ s/^\s+//g; $name =~ s/\s+$//g;
|
|
$val =~ s/^\s+//g; $val =~ s/\s+$//g;
|
|
$rv{$name} = $val;
|
|
}
|
|
close(CONF);
|
|
return %rv;
|
|
}
|
|
|
|
# update_vital_config()
|
|
# Updates %config with defaults, and dies if something vital is missing
|
|
sub update_vital_config
|
|
{
|
|
my %vital = ("port", 80,
|
|
"root", "./",
|
|
"server", "MiniServ/0.01",
|
|
"index_docs", "index.html index.htm index.cgi index.php",
|
|
"addtype_html", "text/html",
|
|
"addtype_txt", "text/plain",
|
|
"addtype_gif", "image/gif",
|
|
"addtype_jpg", "image/jpeg",
|
|
"addtype_jpeg", "image/jpeg",
|
|
"realm", "MiniServ",
|
|
"session_login", "/session_login.cgi",
|
|
"pam_login", "/pam_login.cgi",
|
|
"password_form", "/password_form.cgi",
|
|
"password_change", "/password_change.cgi",
|
|
"maxconns", 50,
|
|
"pam", "webmin",
|
|
"sidname", "sid",
|
|
"unauth", "^/unauthenticated/ ^[A-Za-z0-9\\-/]+\\.jar\$ ^[A-Za-z0-9\\-/]+\\.class\$ ^[A-Za-z0-9\\-/]+\\.gif\$ ^[A-Za-z0-9\\-/]+\\.conf\$ ^[A-Za-z0-9\\-/]+\\.ico\$",
|
|
"max_post", 10000,
|
|
"expires", 7*24*60*60,
|
|
);
|
|
foreach my $v (keys %vital) {
|
|
if (!$config{$v}) {
|
|
if ($vital{$v} eq "") {
|
|
die "Missing config option $v";
|
|
}
|
|
$config{$v} = $vital{$v};
|
|
}
|
|
}
|
|
if (!$config{'sessiondb'}) {
|
|
$config{'pidfile'} =~ /^(.*)\/[^\/]+$/;
|
|
$config{'sessiondb'} = "$1/sessiondb";
|
|
}
|
|
if (!$config{'errorlog'}) {
|
|
$config{'logfile'} =~ /^(.*)\/[^\/]+$/;
|
|
$config{'errorlog'} = "$1/miniserv.error";
|
|
}
|
|
if (!$config{'tempbase'}) {
|
|
$config{'pidfile'} =~ /^(.*)\/[^\/]+$/;
|
|
$config{'tempbase'} = "$1/cgitemp";
|
|
}
|
|
if (!$config{'blockedfile'}) {
|
|
$config{'pidfile'} =~ /^(.*)\/[^\/]+$/;
|
|
$config{'blockedfile'} = "$1/blocked";
|
|
}
|
|
}
|
|
|
|
# read_users_file()
|
|
# Fills the %users and %certs hashes from the users file in %config
|
|
sub read_users_file
|
|
{
|
|
undef(%users);
|
|
undef(%certs);
|
|
undef(%allow);
|
|
undef(%deny);
|
|
undef(%allowdays);
|
|
undef(%allowhours);
|
|
undef(%lastchanges);
|
|
if ($config{'userfile'}) {
|
|
open(USERS, $config{'userfile'});
|
|
while(<USERS>) {
|
|
s/\r|\n//g;
|
|
local @user = split(/:/, $_, -1);
|
|
$users{$user[0]} = $user[1];
|
|
$certs{$user[0]} = $user[3] if ($user[3]);
|
|
if ($user[4] =~ /^allow\s+(.*)/) {
|
|
$allow{$user[0]} = $config{'alwaysresolve'} ?
|
|
[ split(/\s+/, $1) ] :
|
|
[ &to_ipaddress(split(/\s+/, $1)) ];
|
|
}
|
|
elsif ($user[4] =~ /^deny\s+(.*)/) {
|
|
$deny{$user[0]} = $config{'alwaysresolve'} ?
|
|
[ split(/\s+/, $1) ] :
|
|
[ &to_ipaddress(split(/\s+/, $1)) ];
|
|
}
|
|
if ($user[5] =~ /days\s+(\S+)/) {
|
|
$allowdays{$user[0]} = [ split(/,/, $1) ];
|
|
}
|
|
if ($user[5] =~ /hours\s+(\d+)\.(\d+)-(\d+).(\d+)/) {
|
|
$allowhours{$user[0]} = [ $1*60+$2, $3*60+$4 ];
|
|
}
|
|
$lastchanges{$user[0]} = $user[6];
|
|
}
|
|
close(USERS);
|
|
}
|
|
}
|
|
|
|
# read_mime_types()
|
|
# Fills %mime with entries from file in %config and extra settings in %config
|
|
sub read_mime_types
|
|
{
|
|
undef(%mime);
|
|
if ($config{"mimetypes"} ne "") {
|
|
open(MIME, $config{"mimetypes"});
|
|
while(<MIME>) {
|
|
chop; s/#.*$//;
|
|
if (/^(\S+)\s+(.*)$/) {
|
|
my $type = $1;
|
|
my @exts = split(/\s+/, $2);
|
|
foreach my $ext (@exts) {
|
|
$mime{$ext} = $type;
|
|
}
|
|
}
|
|
}
|
|
close(MIME);
|
|
}
|
|
foreach my $k (keys %config) {
|
|
if ($k !~ /^addtype_(.*)$/) { next; }
|
|
$mime{$1} = $config{$k};
|
|
}
|
|
}
|
|
|
|
# build_config_mappings()
|
|
# Build the anonymous access list, IP access list, unauthenticated URLs list,
|
|
# redirect mapping and allow and deny lists from %config
|
|
sub build_config_mappings
|
|
{
|
|
# build anonymous access list
|
|
undef(%anonymous);
|
|
foreach my $a (split(/\s+/, $config{'anonymous'})) {
|
|
if ($a =~ /^([^=]+)=(\S+)$/) {
|
|
$anonymous{$1} = $2;
|
|
}
|
|
}
|
|
|
|
# build IP access list
|
|
undef(%ipaccess);
|
|
foreach my $a (split(/\s+/, $config{'ipaccess'})) {
|
|
if ($a =~ /^([^=]+)=(\S+)$/) {
|
|
$ipaccess{$1} = $2;
|
|
}
|
|
}
|
|
|
|
# build unauthenticated URLs list
|
|
@unauth = split(/\s+/, $config{'unauth'});
|
|
|
|
# build redirect mapping
|
|
undef(%redirect);
|
|
foreach my $r (split(/\s+/, $config{'redirect'})) {
|
|
if ($r =~ /^([^=]+)=(\S+)$/) {
|
|
$redirect{$1} = $2;
|
|
}
|
|
}
|
|
|
|
# build prefixes to be stripped
|
|
undef(@strip_prefix);
|
|
foreach my $r (split(/\s+/, $config{'strip_prefix'})) {
|
|
push(@strip_prefix, $r);
|
|
}
|
|
|
|
# Init allow and deny lists
|
|
@deny = split(/\s+/, $config{"deny"});
|
|
@deny = &to_ipaddress(@deny) if (!$config{'alwaysresolve'});
|
|
@allow = split(/\s+/, $config{"allow"});
|
|
@allow = &to_ipaddress(@allow) if (!$config{'alwaysresolve'});
|
|
undef(@allowusers);
|
|
undef(@denyusers);
|
|
if ($config{'allowusers'}) {
|
|
@allowusers = split(/\s+/, $config{'allowusers'});
|
|
}
|
|
elsif ($config{'denyusers'}) {
|
|
@denyusers = split(/\s+/, $config{'denyusers'});
|
|
}
|
|
|
|
# Build list of unixauth mappings
|
|
undef(%unixauth);
|
|
foreach my $ua (split(/\s+/, $config{'unixauth'})) {
|
|
if ($ua =~ /^(\S+)=(\S+)$/) {
|
|
$unixauth{$1} = $2;
|
|
}
|
|
else {
|
|
$unixauth{"*"} = $ua;
|
|
}
|
|
}
|
|
|
|
# Build list of non-session-auth pages
|
|
undef(%sessiononly);
|
|
foreach my $sp (split(/\s+/, $config{'sessiononly'})) {
|
|
$sessiononly{$sp} = 1;
|
|
}
|
|
|
|
# Build list of logout times
|
|
undef(@logouttimes);
|
|
foreach my $a (split(/\s+/, $config{'logouttimes'})) {
|
|
if ($a =~ /^([^=]+)=(\S+)$/) {
|
|
push(@logouttimes, [ $1, $2 ]);
|
|
}
|
|
}
|
|
push(@logouttimes, [ undef, $config{'logouttime'} ]);
|
|
|
|
# Build list of DAV pathss
|
|
undef(@davpaths);
|
|
foreach my $d (split(/\s+/, $config{'davpaths'})) {
|
|
push(@davpaths, $d);
|
|
}
|
|
@davusers = split(/\s+/, $config{'dav_users'});
|
|
|
|
# Mobile agent substrings and hostname prefixes
|
|
@mobile_agents = split(/\t+/, $config{'mobile_agents'});
|
|
@mobile_prefixes = split(/\s+/, $config{'mobile_prefixes'});
|
|
|
|
# Open debug log
|
|
close(DEBUG);
|
|
if ($config{'debug'}) {
|
|
open(DEBUG, ">>$config{'debug'}");
|
|
}
|
|
else {
|
|
open(DEBUG, ">/dev/null");
|
|
}
|
|
|
|
# Reset cache of sudo checks
|
|
undef(%sudocache);
|
|
}
|
|
|
|
# is_group_member(&uinfo, groupname)
|
|
# Returns 1 if some user is a primary or secondary member of a group
|
|
sub is_group_member
|
|
{
|
|
local ($uinfo, $group) = @_;
|
|
local @ginfo = getgrnam($group);
|
|
return 0 if (!@ginfo);
|
|
return 1 if ($ginfo[2] == $uinfo->[3]); # primary member
|
|
foreach my $m (split(/\s+/, $ginfo[3])) {
|
|
return 1 if ($m eq $uinfo->[0]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
# prefix_to_mask(prefix)
|
|
# Converts a number like 24 to a mask like 255.255.255.0
|
|
sub prefix_to_mask
|
|
{
|
|
return $_[0] >= 24 ? "255.255.255.".(256-(2 ** (32-$_[0]))) :
|
|
$_[0] >= 16 ? "255.255.".(256-(2 ** (24-$_[0]))).".0" :
|
|
$_[0] >= 8 ? "255.".(256-(2 ** (16-$_[0]))).".0.0" :
|
|
(256-(2 ** (8-$_[0]))).".0.0.0";
|
|
}
|
|
|
|
# get_logout_time(user, session-id)
|
|
# Given a username, returns the idle time before he will be logged out
|
|
sub get_logout_time
|
|
{
|
|
local ($user, $sid) = @_;
|
|
if (!defined($logout_time_cache{$user,$sid})) {
|
|
local $time;
|
|
foreach my $l (@logouttimes) {
|
|
if ($l->[0] =~ /^\@(.*)$/) {
|
|
# Check group membership
|
|
local @uinfo = getpwnam($user);
|
|
if (@uinfo && &is_group_member(\@uinfo, $1)) {
|
|
$time = $l->[1];
|
|
}
|
|
}
|
|
elsif ($l->[0] =~ /^\//) {
|
|
# Check file contents
|
|
open(FILE, $l->[0]);
|
|
while(<FILE>) {
|
|
s/\r|\n//g;
|
|
s/^\s*#.*$//;
|
|
if ($user eq $_) {
|
|
$time = $l->[1];
|
|
last;
|
|
}
|
|
}
|
|
close(FILE);
|
|
}
|
|
elsif (!$l->[0]) {
|
|
# Always match
|
|
$time = $l->[1];
|
|
}
|
|
else {
|
|
# Check username
|
|
if ($l->[0] eq $user) {
|
|
$time = $l->[1];
|
|
}
|
|
}
|
|
last if (defined($time));
|
|
}
|
|
$logout_time_cache{$user,$sid} = $time;
|
|
}
|
|
return $logout_time_cache{$user,$sid};
|
|
}
|
|
|
|
sub unix_crypt
|
|
{
|
|
local ($pass, $salt) = @_;
|
|
if ($use_perl_crypt) {
|
|
return Crypt::UnixCrypt::crypt($pass, $salt);
|
|
}
|
|
else {
|
|
return crypt($pass, $salt);
|
|
}
|
|
}
|
|
|
|
# handle_dav_request(davpath)
|
|
# Pass a request on to the Net::DAV::Server module
|
|
sub handle_dav_request
|
|
{
|
|
local ($path) = @_;
|
|
eval "use Filesys::Virtual::Plain";
|
|
eval "use Net::DAV::Server";
|
|
eval "use HTTP::Request";
|
|
eval "use HTTP::Headers";
|
|
|
|
if ($Net::DAV::Server::VERSION eq '1.28' && $config{'dav_nolock'}) {
|
|
delete $Net::DAV::Server::implemented{lock};
|
|
delete $Net::DAV::Server::implemented{unlock};
|
|
}
|
|
|
|
# Read in request data
|
|
if (!$posted_data) {
|
|
local $clen = $header{"content-length"};
|
|
while(length($posted_data) < $clen) {
|
|
$buf = &read_data($clen - length($posted_data));
|
|
if (!length($buf)) {
|
|
&http_error(500, "Failed to read POST request");
|
|
}
|
|
chomp($posted_data);
|
|
#$posted_data =~ s/\015$//mg;
|
|
$posted_data .= $buf;
|
|
}
|
|
}
|
|
|
|
# For subsequent logging
|
|
open(MINISERVLOG, ">>$config{'logfile'}");
|
|
|
|
# Switch to user
|
|
local $root;
|
|
local @u = getpwnam($authuser);
|
|
if ($config{'dav_remoteuser'} && !$< && $validated) {
|
|
if (@u) {
|
|
if ($u[2] != 0) {
|
|
$( = $u[3]; $) = "$u[3] $u[3]";
|
|
($>, $<) = ($u[2], $u[2]);
|
|
}
|
|
if ($config{'dav_root'} eq '*') {
|
|
$root = $u[7];
|
|
}
|
|
}
|
|
else {
|
|
&http_error(500, "Unix user $authuser does not exist");
|
|
return 0;
|
|
}
|
|
}
|
|
$root ||= $config{'dav_root'};
|
|
$root ||= "/";
|
|
|
|
# Check if this user can use DAV
|
|
if (@davusers) {
|
|
&users_match(\@u, @davusers) ||
|
|
&http_error(500, "You are not allowed to access DAV");
|
|
}
|
|
|
|
# Create DAV server
|
|
my $filesys = Filesys::Virtual::Plain->new({root_path => $root});
|
|
my $webdav = Net::DAV::Server->new();
|
|
$webdav->filesys($filesys);
|
|
|
|
# Make up a request object, and feed to DAV
|
|
local $ho = HTTP::Headers->new;
|
|
foreach my $h (keys %header) {
|
|
next if (lc($h) eq "connection");
|
|
$ho->header($h => $header{$h});
|
|
}
|
|
if ($path ne "/") {
|
|
$request_uri =~ s/^\Q$path\E//;
|
|
$request_uri = "/" if ($request_uri eq "");
|
|
}
|
|
my $request = HTTP::Request->new($method, $request_uri, $ho,
|
|
$posted_data);
|
|
if ($config{'dav_debug'}) {
|
|
print STDERR "DAV request :\n";
|
|
print STDERR "---------------------------------------------\n";
|
|
print STDERR $request->as_string();
|
|
print STDERR "---------------------------------------------\n";
|
|
}
|
|
my $response = $webdav->run($request);
|
|
|
|
# Send back the reply
|
|
&write_data("HTTP/1.1 ",$response->code()," ",$response->message(),"\r\n");
|
|
local $content = $response->content();
|
|
if ($path ne "/") {
|
|
$content =~ s|href>/(.+)<|href>$path/$1<|g;
|
|
$content =~ s|href>/<|href>$path<|g;
|
|
}
|
|
foreach my $h ($response->header_field_names) {
|
|
next if (lc($h) eq "connection" || lc($h) eq "content-length");
|
|
&write_data("$h: ",$response->header($h),"\r\n");
|
|
}
|
|
&write_data("Content-length: ",length($content),"\r\n");
|
|
local $rv = &write_keep_alive(0);
|
|
&write_data("\r\n");
|
|
&write_data($content);
|
|
|
|
if ($config{'dav_debug'}) {
|
|
print STDERR "DAV reply :\n";
|
|
print STDERR "---------------------------------------------\n";
|
|
print STDERR "HTTP/1.1 ",$response->code()," ",$response->message(),"\r\n";
|
|
foreach my $h ($response->header_field_names) {
|
|
next if (lc($h) eq "connection" || lc($h) eq "content-length");
|
|
print STDERR "$h: ",$response->header($h),"\r\n";
|
|
}
|
|
print STDERR "Content-length: ",length($content),"\r\n";
|
|
print STDERR "\r\n";
|
|
print STDERR $content;
|
|
print STDERR "---------------------------------------------\n";
|
|
}
|
|
|
|
# Log it
|
|
&log_request($acpthost, $authuser, $reqline, $response->code(),
|
|
length($response->content()));
|
|
}
|
|
|
|
# get_system_hostname()
|
|
# Returns the hostname of this system, for reporting to listeners
|
|
sub get_system_hostname
|
|
{
|
|
# On Windows, try computername environment variable
|
|
return $ENV{'computername'} if ($ENV{'computername'});
|
|
return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
|
|
|
|
# If a specific command is set, use it first
|
|
if ($config{'hostname_command'}) {
|
|
local $out = `($config{'hostname_command'}) 2>&1`;
|
|
if (!$?) {
|
|
$out =~ s/\r|\n//g;
|
|
return $out;
|
|
}
|
|
}
|
|
|
|
# First try the hostname command
|
|
local $out = `hostname 2>&1`;
|
|
if (!$? && $out =~ /\S/) {
|
|
$out =~ s/\r|\n//g;
|
|
return $out;
|
|
}
|
|
|
|
# Try the Sys::Hostname module
|
|
eval "use Sys::Hostname";
|
|
if (!$@) {
|
|
local $rv = eval "hostname()";
|
|
if (!$@ && $rv) {
|
|
return $rv;
|
|
}
|
|
}
|
|
|
|
# Must use net name on Windows
|
|
local $out = `net name 2>&1`;
|
|
if ($out =~ /\-+\r?\n(\S+)/) {
|
|
return $1;
|
|
}
|
|
|
|
return undef;
|
|
}
|
|
|
|
# indexof(string, array)
|
|
# Returns the index of some value in an array, or -1
|
|
sub indexof {
|
|
local($i);
|
|
for($i=1; $i <= $#_; $i++) {
|
|
if ($_[$i] eq $_[0]) { return $i - 1; }
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
# has_command(command)
|
|
# Returns the full path if some command is in the path, undef if not
|
|
sub has_command
|
|
{
|
|
local($d);
|
|
if (!$_[0]) { return undef; }
|
|
if (exists($has_command_cache{$_[0]})) {
|
|
return $has_command_cache{$_[0]};
|
|
}
|
|
local $rv = undef;
|
|
if ($_[0] =~ /^\//) {
|
|
$rv = -x $_[0] ? $_[0] : undef;
|
|
}
|
|
else {
|
|
local $sp = $on_windows ? ';' : ':';
|
|
foreach $d (split($sp, $ENV{PATH})) {
|
|
if (-x "$d/$_[0]") {
|
|
$rv = "$d/$_[0]";
|
|
last;
|
|
}
|
|
if ($on_windows) {
|
|
foreach my $sfx (".exe", ".com", ".bat") {
|
|
if (-r "$d/$_[0]".$sfx) {
|
|
$rv = "$d/$_[0]".$sfx;
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$has_command_cache{$_[0]} = $rv;
|
|
return $rv;
|
|
}
|
|
|
|
# check_sudo_permissions(user, pass)
|
|
# Returns 1 if some user can run any command via sudo
|
|
sub check_sudo_permissions
|
|
{
|
|
local ($user, $pass) = @_;
|
|
|
|
# First try the pipes
|
|
if ($PASSINw) {
|
|
print DEBUG "check_sudo_permissions: querying cache for $user\n";
|
|
print $PASSINw "readsudo $user\n";
|
|
local $can = <$PASSOUTr>;
|
|
chop($can);
|
|
print DEBUG "check_sudo_permissions: cache said $can\n";
|
|
if ($can =~ /^\d+$/ && $can != 2) {
|
|
return int($can);
|
|
}
|
|
}
|
|
|
|
local $ptyfh = new IO::Pty;
|
|
print DEBUG "check_sudo_permissions: ptyfh=$ptyfh\n";
|
|
if (!$ptyfh) {
|
|
print STDERR "Failed to create new PTY with IO::Pty\n";
|
|
return 0;
|
|
}
|
|
local @uinfo = getpwnam($user);
|
|
if (!@uinfo) {
|
|
print STDERR "Unix user $user does not exist for sudo\n";
|
|
return 0;
|
|
}
|
|
|
|
# Execute sudo in a sub-process, via a pty
|
|
local $ttyfh = $ptyfh->slave();
|
|
print DEBUG "check_sudo_permissions: ttyfh=$ttyfh\n";
|
|
local $tty = $ptyfh->ttyname();
|
|
print DEBUG "check_sudo_permissions: tty=$tty\n";
|
|
chown($uinfo[2], $uinfo[3], $tty);
|
|
pipe(SUDOr, SUDOw);
|
|
print DEBUG "check_sudo_permissions: about to fork..\n";
|
|
local $pid = fork();
|
|
print DEBUG "check_sudo_permissions: fork=$pid pid=$$\n";
|
|
if ($pid < 0) {
|
|
print STDERR "fork for sudo failed : $!\n";
|
|
return 0;
|
|
}
|
|
if (!$pid) {
|
|
setsid();
|
|
$ptyfh->make_slave_controlling_terminal();
|
|
close(STDIN); close(STDOUT); close(STDERR);
|
|
untie(*STDIN); untie(*STDOUT); untie(*STDERR);
|
|
close($PASSINw); close($PASSOUTr);
|
|
$( = $uinfo[3]; $) = "$uinfo[3] $uinfo[3]";
|
|
($>, $<) = ($uinfo[2], $uinfo[2]);
|
|
|
|
close(SUDOw);
|
|
close(SOCK);
|
|
close(MAIN);
|
|
open(STDIN, "<&SUDOr");
|
|
open(STDOUT, ">$tty");
|
|
open(STDERR, ">&STDOUT");
|
|
close($ptyfh);
|
|
exec("sudo -l -S");
|
|
print "Exec failed : $!\n";
|
|
exit 1;
|
|
}
|
|
print DEBUG "check_sudo_permissions: pid=$pid\n";
|
|
close(SUDOr);
|
|
$ptyfh->close_slave();
|
|
|
|
# Send password, and get back response
|
|
local $oldfh = select(SUDOw);
|
|
$| = 1;
|
|
select($oldfh);
|
|
print DEBUG "check_sudo_permissions: about to send pass\n";
|
|
local $SIG{'PIPE'} = 'ignore'; # Sometimes sudo doesn't ask for a password
|
|
print SUDOw $pass,"\n";
|
|
print DEBUG "check_sudo_permissions: sent pass=$pass\n";
|
|
close(SUDOw);
|
|
local $out;
|
|
while(<$ptyfh>) {
|
|
print DEBUG "check_sudo_permissions: got $_";
|
|
$out .= $_;
|
|
}
|
|
close($ptyfh);
|
|
kill('KILL', $pid);
|
|
waitpid($pid, 0);
|
|
local ($ok) = ($out =~ /\(ALL\)\s+ALL/ ? 1 : 0);
|
|
|
|
# Update cache
|
|
if ($PASSINw) {
|
|
print $PASSINw "writesudo $user $ok\n";
|
|
}
|
|
|
|
return $ok;
|
|
}
|
|
|
|
# is_mobile_useragent(agent)
|
|
# Returns 1 if some user agent looks like a cellphone or other mobile device,
|
|
# such as a treo.
|
|
sub is_mobile_useragent
|
|
{
|
|
local ($agent) = @_;
|
|
local @prefixes = (
|
|
"UP.Link", # Openwave
|
|
"Nokia", # All Nokias start with Nokia
|
|
"MOT-", # All Motorola phones start with MOT-
|
|
"SAMSUNG", # Samsung browsers
|
|
"Samsung", # Samsung browsers
|
|
"SEC-", # Samsung browsers
|
|
"AU-MIC", # Samsung browsers
|
|
"AUDIOVOX", # Audiovox
|
|
"BlackBerry", # BlackBerry
|
|
"hiptop", # Danger hiptop Sidekick
|
|
"SonyEricsson", # Sony Ericsson
|
|
"Ericsson", # Old Ericsson browsers , mostly WAP
|
|
"Mitsu/1.1.A", # Mitsubishi phones
|
|
"Panasonic WAP", # Panasonic old WAP phones
|
|
"DoCoMo", # DoCoMo phones
|
|
"Lynx", # Lynx text-mode linux browser
|
|
"Links", # Another text-mode linux browser
|
|
);
|
|
local @substrings = (
|
|
"UP.Browser", # Openwave
|
|
"MobilePhone", # NetFront
|
|
"AU-MIC-A700", # Samsung A700 Obigo browsers
|
|
"Danger hiptop", # Danger Sidekick hiptop
|
|
"Windows CE", # Windows CE Pocket PC
|
|
"Blazer", # Palm Treo Blazer
|
|
"BlackBerry", # BlackBerries can emulate other browsers, but
|
|
# they still keep this string in the UserAgent
|
|
"SymbianOS", # New Series60 browser has safari in it and
|
|
# SymbianOS is the only distinguishing string
|
|
"iPhone", # Apple iPhone KHTML browser
|
|
"iPod", # iPod touch browser
|
|
);
|
|
foreach my $p (@prefixes) {
|
|
return 1 if ($agent =~ /^\Q$p\E/);
|
|
}
|
|
foreach my $s (@substrings, @mobile_agents) {
|
|
return 1 if ($agent =~ /\Q$s\E/);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
# write_blocked_file()
|
|
# Writes out a text file of blocked hosts and users
|
|
sub write_blocked_file
|
|
{
|
|
open(BLOCKED, ">$config{'blockedfile'}");
|
|
foreach my $d (grep { $hostfail{$_} } @deny) {
|
|
print BLOCKED "host $d $hostfail{$d} $blockhosttime{$d}\n";
|
|
}
|
|
foreach my $d (grep { $userfail{$_} } @denyusers) {
|
|
print BLOCKED "user $d $userfail{$d} $blockusertime{$d}\n";
|
|
}
|
|
close(BLOCKED);
|
|
chmod(0700, $config{'blockedfile'});
|
|
}
|
|
|
|
sub write_pid_file
|
|
{
|
|
open(PIDFILE, ">$config{'pidfile'}");
|
|
printf PIDFILE "%d\n", getpid();
|
|
close(PIDFILE);
|
|
}
|
|
|