#!/usr/bin/perl # A very simple perl web server used by Webmin # Require basic libraries package miniserv; use Socket; use POSIX; use Sys::Hostname; # Find and read config file if (@ARGV != 1) { die "Usage: miniserv.pl <config file>"; } if ($ARGV[0] =~ /^\//) { $conf = $ARGV[0]; } else { chop($pwd = `pwd`); $conf = "$pwd/$ARGV[0]"; } open(CONF, $conf) || die "Failed to open config file $conf : $!"; while(<CONF>) { s/\r|\n//g; if (/^#/ || !/\S/) { next; } /^([^=]+)=(.*)$/; $name = $1; $val = $2; $name =~ s/^\s+//g; $name =~ s/\s+$//g; $val =~ s/^\s+//g; $val =~ s/\s+$//g; $config{$name} = $val; } close(CONF); # Check is SSL is enabled and available if ($config{'ssl'}) { eval "use Net::SSLeay"; if (!$@) { $use_ssl = 1; # These functions only exist for SSLeay 1.0 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()"; eval "Net::SSLeay::load_error_strings()"; if (defined(&Net::SSLeay::X509_STORE_CTX_get_current_cert) && defined(&Net::SSLeay::CTX_load_verify_locations) && defined(&Net::SSLeay::CTX_set_verify)) { $client_certs = 1; } } } # Check if the syslog module is available to log hacking attempts if ($config{'syslog'}) { eval "use Sys::Syslog qw(:DEFAULT setlogsock)"; if (!$@) { $use_syslog = 1; } } # check if the PAM module is available to authenticate eval "use Authen::PAM"; if (!$@) { # check if the PAM authentication can be used by opening a handle if (! ref($pamh = new Authen::PAM("miniserv", "root", \&pam_conv_func))) { print STDERR "PAM module available, but error during init !\n"; print STDERR "Disabling PAM functions.\n"; } else { $use_pam = 1; } } # check if the TCP-wrappers module is available if ($config{'libwrap'}) { eval "use Authen::Libwrap qw(hosts_ctl STRING_UNKNOWN)"; if (!$@) { $use_libwrap = 1; } } # Get miniserv's perl path and location $miniserv_path = $0; open(SOURCE, $miniserv_path); <SOURCE> =~ /^#!(\S+)/; $perl_path = $1; close(SOURCE); @miniserv_argv = @ARGV; # Check vital config options %vital = ("port", 80, "root", "./", "server", "MiniServ/0.01", "index_docs", "index.html index.htm index.cgi", "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" ); foreach $v (keys %vital) { if (!$config{$v}) { if ($vital{$v} eq "") { die "Missing config option $v"; } $config{$v} = $vital{$v}; } } if (!$config{'sessiondb'}) { $config{'pidfile'} =~ /^(.*)\/[^\/]+$/; $config{'sessiondb'} = "$1/sessiondb"; } die "Session authentication cannot be used in inetd mode" if ($config{'inetd'} && $config{'session'}); # init days and months for http_date @weekday = ( "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ); @month = ( "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ); # Change dir to the server root chdir($config{'root'}); $user_homedir = (getpwuid($<))[7]; # Read users file if ($config{'userfile'}) { open(USERS, $config{'userfile'}); while(<USERS>) { s/\r|\n//g; local @user = split(/:/, $_); $users{$user[0]} = $user[1]; $certs{$user[0]} = $user[3] if ($user[3]); if ($user[4] =~ /^allow\s+(.*)/) { $allow{$user[0]} = [ &to_ipaddress(split(/\s+/, $1)) ]; } elsif ($user[4] =~ /^deny\s+(.*)/) { $deny{$user[0]} = [ &to_ipaddress(split(/\s+/, $1)) ]; } } close(USERS); } # Setup SSL if possible and if requested if ($use_ssl) { $ssl_ctx = Net::SSLeay::CTX_new() || die "Failed to create SSL context : $!"; $client_certs = 0 if (!$config{'ca'} || !%certs); 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); } Net::SSLeay::CTX_use_RSAPrivateKey_file( $ssl_ctx, $config{'keyfile'}, &Net::SSLeay::FILETYPE_PEM) || die "Failed to open SSL key"; Net::SSLeay::CTX_use_certificate_file( $ssl_ctx, $config{'keyfile'}, &Net::SSLeay::FILETYPE_PEM); } # Setup syslog support if possible and if requested if ($use_syslog) { eval { openlog("miniserv", "cons,pid,ndelay", "daemon") }; $use_syslog = 0 if ($@); } # Read MIME types file and add extra types if ($config{"mimetypes"} ne "") { open(MIME, $config{"mimetypes"}); while(<MIME>) { chop; s/#.*$//; if (/^(\S+)\s+(.*)$/) { $type = $1; @exts = split(/\s+/, $2); foreach $ext (@exts) { $mime{$ext} = $type; } } } close(MIME); } foreach $k (keys %config) { if ($k !~ /^addtype_(.*)$/) { next; } $mime{$1} = $config{$k}; } # get the time zone if ($config{'log'}) { local(@gmt, @lct, $days, $hours, $mins); @make_date_marr = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"); @gmt = gmtime(time()); @lct = localtime(time()); $days = $lct[3] - $gmt[3]; $hours = ($days < -1 ? 24 : 1 < $days ? -24 : $days * 24) + $lct[2] - $gmt[2]; $mins = $hours * 60 + $lct[1] - $gmt[1]; $timezone = ($mins < 0 ? "-" : "+"); $mins = abs($mins); $timezone .= sprintf "%2.2d%2.2d", $mins/60, $mins%60; } if ($config{'inetd'}) { # We are being run from inetd - go direct to handling the request $SIG{'HUP'} = 'IGNORE'; $SIG{'TERM'} = 'DEFAULT'; $SIG{'PIPE'} = 'DEFAULT'; open(SOCK, "+>&STDIN"); # Check if it is time for the logfile to be cleared if ($config{'logclear'}) { local $write_logtime = 0; local @st = stat("$config{'logfile'}.time"); if (@st) { if ($st[9]+$config{'logtime'}*60*60 < time()){ # need to clear log $write_logtime = 1; unlink($config{'logfile'}); } } else { $write_logtime = 1; } if ($write_logtime) { open(LOGTIME, ">$config{'logfile'}.time"); print LOGTIME time(),"\n"; close(LOGTIME); } } # Initialize SSL for this connection if ($use_ssl) { $ssl_con = Net::SSLeay::new($ssl_ctx); Net::SSLeay::set_fd($ssl_con, fileno(SOCK)); #Net::SSLeay::use_RSAPrivateKey_file( # $ssl_con, $config{'keyfile'}, # &Net::SSLeay::FILETYPE_PEM); #Net::SSLeay::use_certificate_file( # $ssl_con, $config{'keyfile'}, # &Net::SSLeay::FILETYPE_PEM); Net::SSLeay::accept($ssl_con) || exit; } # Work out the hostname for this web server if (!$config{'host'}) { ($myport, $myaddr) = unpack_sockaddr_in(getsockname(SOCK)); $myname = gethostbyaddr($myaddr, AF_INET); if ($myname eq "") { $myname = inet_ntoa($myaddr); } $host = $myname; } else { $host = $config{'host'}; } $port = $config{'port'}; while(&handle_request(getpeername(SOCK), getsockname(SOCK))) { } close(SOCK); exit; } # Open main socket $proto = getprotobyname('tcp'); socket(MAIN, PF_INET, SOCK_STREAM, $proto) || die "Failed to open main socket : $!"; setsockopt(MAIN, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)); $baddr = $config{"bind"} ? inet_aton($config{"bind"}) : INADDR_ANY; for($i=0; $i<5; $i++) { last if (bind(MAIN, sockaddr_in($config{port}, $baddr))); sleep(1); } die "Failed to bind port $config{port} : $!" if ($i == 5); listen(MAIN, SOMAXCONN); if ($config{'listen'}) { # Open the socket that allows other miniserv servers to find this one $proto = getprotobyname('udp'); if (socket(LISTEN, PF_INET, SOCK_DGRAM, $proto)) { setsockopt(LISTEN, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)); bind(LISTEN, sockaddr_in($config{'listen'}, INADDR_ANY)); listen(LISTEN, SOMAXCONN); } else { print STDERR "Failed to open listening socket : $!\n"; $config{'listen'} = 0; } } # Split from the controlling terminal if (fork()) { exit; } setsid(); # write out the PID file open(PIDFILE, "> $config{'pidfile'}"); printf PIDFILE "%d\n", getpid(); close(PIDFILE); # Start the log-clearing process, if needed. This checks every minute # to see if the log has passed its reset time, and if so clears it if ($config{'logclear'}) { if (!($logclearer = fork())) { while(1) { local $write_logtime = 0; local @st = stat("$config{'logfile'}.time"); if (@st) { if ($st[9]+$config{'logtime'}*60*60 < time()){ # need to clear log $write_logtime = 1; unlink($config{'logfile'}); } } else { $write_logtime = 1; } if ($write_logtime) { open(LOGTIME, ">$config{'logfile'}.time"); print LOGTIME time(),"\n"; close(LOGTIME); } sleep(5*60); } exit; } push(@childpids, $logclearer); } # Setup the logout time dbm if needed if ($config{'session'}) { eval "use SDBM_File"; dbmopen(%sessiondb, $config{'sessiondb'}, 0700); eval { $sessiondb{'1111111111'} = 'foo bar' }; if ($@) { dbmclose(%sessiondb); eval "use NDBM_File"; dbmopen(%sessiondb, $config{'sessiondb'}, 0700); } } # Run the main loop $SIG{'HUP'} = 'miniserv::trigger_restart'; $SIG{'TERM'} = 'miniserv::term_handler'; $SIG{'PIPE'} = 'IGNORE'; @deny = &to_ipaddress(split(/\s+/, $config{"deny"})); @allow = &to_ipaddress(split(/\s+/, $config{"allow"})); $p = 0; while(1) { # wait for a new connection, or a message from a child process undef($rmask); vec($rmask, fileno(MAIN), 1) = 1; if ($config{'passdelay'} || $config{'session'}) { for($i=0; $i<@passin; $i++) { vec($rmask, fileno($passin[$i]), 1) = 1; } } vec($rmask, fileno(LISTEN), 1) = 1 if ($config{'listen'}); local $sel = select($rmask, undef, undef, 10); if ($need_restart) { &restart_miniserv(); } local $time_now = time(); # Clean up finished processes local($pid); do { $pid = waitpid(-1, WNOHANG); @childpids = grep { $_ != $pid } @childpids; } while($pid > 0); # run the unblocking procedure to check if enough time has passed to # unblock hosts that heve been blocked because of password failures 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); } $i++; } } if ($config{'session'}) { # Remove sessions with more than 7 days of inactivity foreach $s (keys %sessiondb) { local ($user, $ltime) = split(/\s+/, $sessiondb{$s}); if ($time_now - $ltime > 7*24*60*60) { delete($sessiondb{$s}); } } } next if ($sel <= 0); if (vec($rmask, fileno(MAIN), 1)) { # got new connection $acptaddr = accept(SOCK, MAIN); if (!$acptaddr) { next; } # create pipes if ($config{'passdelay'} || $config{'session'}) { $PASSINr = "PASSINr$p"; $PASSINw = "PASSINw$p"; $PASSOUTr = "PASSOUTr$p"; $PASSOUTw = "PASSOUTw$p"; $p++; pipe($PASSINr, $PASSINw); pipe($PASSOUTr, $PASSOUTw); select($PASSINw); $| = 1; select($PASSINr); $| = 1; select($PASSOUTw); $| = 1; select($PASSOUTw); $| = 1; } select(STDOUT); # Check username of connecting user local ($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); } } # fork the subprocess if (!($handpid = fork())) { # setup signal handlers $SIG{'TERM'} = 'DEFAULT'; $SIG{'PIPE'} = 'DEFAULT'; #$SIG{'CHLD'} = 'IGNORE'; $SIG{'HUP'} = 'IGNORE'; # Initialize SSL for this connection if ($use_ssl) { $ssl_con = Net::SSLeay::new($ssl_ctx); Net::SSLeay::set_fd($ssl_con, fileno(SOCK)); #Net::SSLeay::use_RSAPrivateKey_file( # $ssl_con, $config{'keyfile'}, # &Net::SSLeay::FILETYPE_PEM); #Net::SSLeay::use_certificate_file( # $ssl_con, $config{'keyfile'}, # &Net::SSLeay::FILETYPE_PEM); Net::SSLeay::accept($ssl_con) || exit; } # close useless pipes if ($config{'passdelay'} || $config{'session'}) { foreach $p (@passin) { close($p); } foreach $p (@passout) { close($p); } close($PASSINr); close($PASSOUTw); } close(MAIN); # Work out the hostname for this web server if (!$config{'host'}) { ($myport, $myaddr) = unpack_sockaddr_in(getsockname(SOCK)); $myname = gethostbyaddr($myaddr, AF_INET); if ($myname eq "") { $myname = inet_ntoa($myaddr); } $host = $myname; } else { $host = $config{'host'}; } $port = $config{'port'}; local $switched = 0; if ($config{'remoteuser'} && $localauth_user && !$<) { # Switch to the UID of the remote user local @u = getpwnam($localauth_user); if (@u) { $( = $u[3]; $) = "$u[3] $u[3]"; $< = $> = $u[2]; $switched = 1; } } if ($config{'switchuser'} && !$< && !$switched) { # Switch to the UID of server user local @u = getpwnam($config{'switchuser'}); if (@u) { $( = $u[3]; $) = "$u[3] $u[3]"; $< = $> = $u[2]; } } while(&handle_request($acptaddr, getsockname(SOCK))) { } shutdown(SOCK, 1); close(SOCK); close($PASSINw); close($PASSOUTw); exit; } push(@childpids, $handpid); if ($config{'passdelay'} || $config{'session'}) { close($PASSINw); close($PASSOUTr); push(@passin, $PASSINr); push(@passout, $PASSOUTw); } close(SOCK); } if ($config{'listen'} && vec($rmask, fileno(LISTEN), 1)) { # Got UDP packet from another miniserv 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))) { send(LISTEN, "$config{'host'}:$config{'port'}:". "$use_ssl", 0, $from); } } # check for password-timeout messages from subprocesses for($i=0; $i<@passin; $i++) { if (vec($rmask, fileno($passin[$i]), 1)) { # this sub-process is asking about a password $infd = $passin[$i]; $outfd = $passout[$i]; $inline = <$infd>; 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"; $hostfail{$2} = 0; } else { # login failed.. $hostfail{$2}++; # add the host to the block list if necessary 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", $logtext); } } else { $blocked = 0; } $dl = $userdlay{$1} - int(($time_now - $userlast{$1})/50); $dl = $dl < 0 ? 0 : $dl+1; print $outfd "$dl $blocked\n"; $userdlay{$1} = $dl; } $userlast{$1} = $time_now; } elsif ($inline =~ /^verify\s+(\S+)/) { # Verifying a session ID local $session_id = $1; if (!defined($sessiondb{$session_id})) { print $outfd "0 0\n"; } else { local ($user, $ltime) = split(/\s+/, $sessiondb{$session_id}); if ($config{'logouttime'} && $time_now - $ltime > $config{'logouttime'}*60) { print $outfd "1 ",$time_now - $ltime,"\n"; delete($sessiondb{$session_id}); } else { print $outfd "2 $user\n"; $sessiondb{$session_id} = "$user $time_now"; } } } elsif ($inline =~ /^new\s+(\S+)\s+(\S+)/) { # Creating a new session $sessiondb{$1} = "$2 $time_now"; } elsif ($inline =~ /^delete\s+(\S+)/) { # Logging out a session print $outfd $sessiondb{$1} ? 1 : 0,"\n"; delete($sessiondb{$1}); } 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; 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"; # Wait at most 60 secs for start of headers (but only for the first time) if (!$checked_timeout) { local $rmask; vec($rmask, fileno(SOCK), 1) = 1; local $sel = select($rmask, undef, undef, 60); $sel || &http_error(400, "Timeout"); $checked_timeout++; } # Read the HTTP request and headers ($reqline = &read_line()) =~ s/\r|\n//g; if (!($reqline =~ /^(GET|POST|HEAD)\s+(.*)\s+HTTP\/1\..$/)) { &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 ""); 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 = $1; $port = $2; } else { $host = $header{'host'}; } } undef(%in); if ($page =~ /^([^\?]+)\?(.*)$/) { # There is some query string information $page = $1; $querystring = $2; 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 $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"); } $posted_data .= $buf; } local @in = split(/\&/, $posted_data); 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; } } # replace %XX sequences in page $page =~ s/%(..)/pack("c",hex($1))/ge; # 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("miniserv", STRING_UNKNOWN, $acptip, STRING_UNKNOWN)) { &http_error(403, "Access denied for $acptip"); return 0; } } # check for the logout flag file, and if existant deny authentication if ($config{'logout'} && -r $config{'logout'}.$in{'miniserv_logout_id'}) { $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 password if needed if (%users) { $validated = 0; $blocked = 0; # Session authentication is never used for connections by # another miniserv server if ($header{'user-agent'} =~ /miniserv/i) { $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))); foreach $u (keys %certs) { if ($certs{$u} eq $peername) { $authuser = $u; $validated = 2; last; } } } # Check for normal HTTP authentication if (!$validated && !$deny_authentication && !$config{'session'} && $header{authorization} =~ /^basic\s+(\S+)$/i) { # authorization given.. ($authuser, $authpass) = split(/:/, &b64decode($1)); $validated = &validate_user($authuser, $authpass); if ($config{'passdelay'} && !$config{'inetd'}) { # check with main process for delay print $PASSINw "delay $authuser $acptip $validated\n"; <$PASSOUTr> =~ /(\d+) (\d+)/; $blocked = $2; sleep($1); } } # Check for new session validation if ($config{'session'} && !$deny_authentication && $page eq $config{'session_login'}) { local $ok = &validate_user($in{'user'}, $in{'pass'}); # check if the test cookie is set if ($header{'cookie'} !~ /testing=1/ && $in{'user'}) { &http_error(500, "No cookies", "Your browser does not support cookies, ". "which are required for Webmin to work in ". "session authentication mode"); } # check with main process for delay if ($config{'passdelay'} && $in{'user'}) { print $PASSINw "delay $in{'user'} $acptip $ok\n"; <$PASSOUTr> =~ /(\d+) (\d+)/; $blocked = $2; sleep($1); } if ($ok) { # Logged in OK! Tell the main process about the new SID local $sid = time(); local $mul = 1; foreach $c (split(//, crypt($in{'pass'}, substr($$, -2)))) { $sid += ord($c) * $mul; $mul *= 3; } print $PASSINw "new $sid $in{'user'}\n"; # Set cookie and redirect &write_data("HTTP/1.0 302 Moved Temporarily\r\n"); &write_data("Date: $datestr\r\n"); &write_data("Server: $config{'server'}\r\n"); $portstr = $port == 80 && !$use_ssl ? "" : $port == 443 && $use_ssl ? "" : ":$port"; $prot = $use_ssl ? "https" : "http"; if ($in{'save'}) { &write_data("Set-Cookie: sid=$sid; path=/; expires=\"Fri, 1-Jan-2038 00:00:01\"\r\n"); } else { &write_data("Set-Cookie: sid=$sid; path=/\r\n"); } &write_data("Location: $prot://$host$portstr$in{'page'}\r\n"); &write_keep_alive(0); &write_data("\r\n"); &log_request($acpthost, $authuser, $reqline, 302, 0); return 0; } elsif ($in{'logout'} && $header{'cookie'} =~ /sid=(\d+)/) { # Logout clicked .. remove the session print $PASSINw "delete $1\n"; local $dummy = <$PASSINr>; $logout = 1; $already_session_id = undef; } else { # Login failed .. display the form again $failed_user = $in{'user'}; $request_uri = $in{'page'}; $already_session_id = undef; } } # Check for an existing session if ($config{'session'} && !$validated) { if ($already_session_id) { $session_id = $already_session_id; $authuser = $already_authuser; $validated = 1; } elsif (!$deny_authentication && $header{'cookie'} =~ /sid=(\d+)/) { $session_id = $1; print $PASSINw "verify $session_id\n"; <$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) { if (defined($users{$localauth_user})) { $validated = 1; $authuser = $localauth_user; } else { $localauth_user = undef; } } if (!$validated) { if ($blocked == 0) { # No password given.. ask if ($config{'session'}) { # Force CGI for session login $validated = 1; if ($logout) { $querystring .= "&logout=1&page=/"; } else { $querystring = "page=".&urlize($request_uri); } $querystring .= "&failed=$failed_user" if ($failed_user); $querystring .= "&timed_out=$timed_out" if ($timed_out); $queryargs = ""; $page = $config{'session_login'}; } 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; } } else { # when the host has been blocked, give it an error message &http_error(403, "Access denied for $acptip. The host has been blocked " ."because of too many authentication failures."); } } # Check per-user IP access control if ($deny{$authuser} && &ip_match($acptip, $localip, @{$deny{$authuser}}) || $allow{$authuser} && !&ip_match($acptip, $localip, @{$allow{$authuser}})) { &http_error(403, "Access denied for $acptip"); return 0; } } # Figure out what kind of page was requested rerun: $simple = &simplify_path($page, $bogus); $simple =~ s/[\000-\037]//g; if ($bogus) { &http_error(400, "Invalid path"); } undef($full); if ($config{'preroot'}) { # Look in the template root directory first $is_directory = 1; $sofar = ""; $full = $config{"preroot"} . $sofar; $scriptname = $simple; foreach $b (split(/\//, $simple)) { if ($b ne "") { $sofar .= "/$b"; } $full = $config{"preroot"} . $sofar; @st = stat($full); if (!@st) { undef($full); last; } # Check if this is a directory if (-d $full) { # 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) { if ($sofar eq '') { $cgi_pwd = $config{'root'}; } else { "$config{'root'}$sofar" =~ /^(.*\/)[^\/]+$/; $cgi_pwd = $1; } if ($is_directory) { # Check for index files in the directory foreach $idx (split(/\s+/, $config{"index_docs"})) { $idxfull = "$full/$idx"; if (-r $idxfull && !(-d $idxfull)) { $full = $idxfull; $is_directory = 0; $scriptname .= "/" if ($scriptname ne "/"); last; } } } } } if (!$full || $is_directory) { $sofar = ""; $full = $config{"root"} . $sofar; $scriptname = $simple; foreach $b (split(/\//, $simple)) { if ($b ne "") { $sofar .= "/$b"; } $full = $config{"root"} . $sofar; @st = stat($full); if (!@st) { &http_error(404, "File not found"); } # Check if this is a directory if (-d $full) { # It is.. go on parsing next; } # Check if this is a CGI program if (&get_type($full) eq "internal/cgi") { $pathinfo = substr($simple, length($sofar)); $pathinfo .= "/" if ($page =~ /\/$/); $scriptname = $sofar; last; } } $full =~ /^(.*\/)[^\/]+$/; $cgi_pwd = $1; } # 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 $full) { # See if the URL ends with a / as it should if ($page !~ /\/$/) { # It doesn't.. redirect &write_data("HTTP/1.0 302 Moved Temporarily\r\n"); $portstr = $port == 80 && !$use_ssl ? "" : $port == 443 && $use_ssl ? "" : ":$port"; &write_data("Date: $datestr\r\n"); &write_data("Server: $config{server}\r\n"); $prot = $use_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 foreach $idx (split(/\s+/, $config{"index_docs"})) { $idxfull = "$full/$idx"; if (-r $idxfull && !(-d $idxfull)) { $cgi_pwd = $full; $full = $idxfull; $scriptname .= "/" if ($scriptname ne "/"); last; } } } if (-d $full) { # This is definately a directory.. list it &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_data("Content-type: text/html\r\n"); &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 ($df =~ /^\./) { next; } (@stbuf = stat("$full/$df")) || next; if (-d "$full/$df") { $df .= "/"; } @tm = localtime($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") { # A CGI program to execute $envtz = $ENV{"TZ"}; $envuser = $ENV{"USER"}; $envpath = $ENV{"PATH"}; foreach (keys %ENV) { delete($ENV{$_}); } $ENV{"PATH"} = $envpath if ($envpath); $ENV{"TZ"} = $envtz if ($envtz); $ENV{"USER"} = $envuser if ($envuser); $ENV{"HOME"} = $user_homedir; $ENV{"SERVER_SOFTWARE"} = $config{"server"}; $ENV{"SERVER_NAME"} = $host; $ENV{"SERVER_ADMIN"} = $config{"email"}; $ENV{"SERVER_ROOT"} = $config{"root"}; $ENV{"SERVER_PORT"} = $port; $ENV{"REMOTE_HOST"} = $acpthost; $ENV{"REMOTE_ADDR"} = $acptip; $ENV{"REMOTE_USER"} = $authuser if (defined($authuser)); $ENV{"SSL_USER"} = $peername if ($validated == 2); $ENV{"DOCUMENT_ROOT"} = $config{"root"}; $ENV{"GATEWAY_INTERFACE"} = "CGI/1.1"; $ENV{"SERVER_PROTOCOL"} = "HTTP/1.0"; $ENV{"REQUEST_METHOD"} = $method; $ENV{"SCRIPT_NAME"} = $scriptname; $ENV{"REQUEST_URI"} = $request_uri; $ENV{"PATH_INFO"} = $pathinfo; $ENV{"PATH_TRANSLATED"} = "$config{root}/$pathinfo"; $ENV{"QUERY_STRING"} = $querystring; $ENV{"MINISERV_CONFIG"} = $conf; $ENV{"HTTPS"} = "ON" if ($use_ssl); $ENV{"SESSION_ID"} = $session_id if ($session_id); $ENV{"LOCAL_USER"} = $localauth_user if ($localauth_user); 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*sid=(\d+)//; # 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-([^\/]+)$/); if (!$config{'forkcgis'} && $first eq $perl_path && $] >= 5.004) { # setup environment for eval chdir($ENV{"PWD"}); @ARGV = split(/\s+/, $queryargs); $0 = $full; if ($posted_data) { # Already read the post input $postinput = $posted_data; } elsif ($method eq "POST") { $clen = $header{"content-length"}; while(length($postinput) < $clen) { $buf = &read_data($clen - length($postinput)); if (!length($buf)) { &http_error(500, "Failed to read ". "POST request"); } $postinput .= $buf; } } $SIG{'CHLD'} = 'DEFAULT'; eval { # Have SOCK closed if the perl exec's something use Fcntl; fcntl(SOCK, F_SETFD, FD_CLOEXEC); }; shutdown(SOCK, 0); if ($config{'log'}) { open(MINISERVLOG, ">>$config{'logfile'}"); chmod(0600, $config{'logfile'}); } $doing_eval = 1; eval { package main; tie(*STDOUT, 'miniserv'); tie(*STDIN, 'miniserv'); do $miniserv::full; die $@ if ($@); }; $doing_eval = 0; if ($@) { # Error in perl! &http_error(500, "Perl execution failed", $@); } elsif (!$doneheaders && !$nph_script) { &http_error(500, "Missing Headers"); } #close(SOCK); $rv = 0; } else { # fork the process that actually executes the CGI pipe(CGIINr, CGIINw); pipe(CGIOUTr, CGIOUTw); pipe(CGIERRr, CGIERRw); if (!($cgipid = fork())) { chdir($ENV{"PWD"}); close(SOCK); open(STDIN, "<&CGIINr"); open(STDOUT, ">&CGIOUTw"); open(STDERR, ">&CGIERRw"); close(CGIINw); close(CGIOUTr); close(CGIERRr); exec($full, split(/\s+/, $queryargs)); print STDERR "Failed to exec $full : $!\n"; exit; } close(CGIINr); close(CGIOUTw); close(CGIERRw); # send post data if ($posted_data) { # already read the posted data print CGIINw $posted_data; } elsif ($method eq "POST") { $got = 0; $clen = $header{"content-length"}; while($got < $clen) { $buf = &read_data($clen-$got); if (!length($buf)) { kill('TERM', $cgipid); &http_error(500, "Failed to read ". "POST request"); } $got += length($buf); print CGIINw $buf; } } close(CGIINw); shutdown(SOCK, 0); if (!$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; } $got_blank++; next; } ($line =~ /^(\S+):\s+(.*)$/) || &http_error(500, "Bad Header", &read_errors(CGIERRr)); $cgiheader{lc($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 "") { &http_error(500, "Missing Content-Type Header", &read_errors(CGIERRr)); } 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 $h (keys %cgiheader) { &write_data("$h: $cgiheader{$h}\r\n"); } &write_data("\r\n"); } &reset_byte_count(); while($line = <CGIOUTr>) { &write_data($line); } close(CGIOUTr); close(CGIERRr); $rv = 0; } } else { # A file to output local @st = stat($full); open(FILE, $full) || &http_error(404, "Failed to open file"); &write_data("HTTP/1.0 $ok_code $ok_message\r\n"); &write_data("Date: $datestr\r\n"); &write_data("Server: $config{server}\r\n"); &write_data("Content-type: ".&get_type($full)."\r\n"); &write_data("Content-length: $st[7]\r\n"); &write_data("Last-Modified: ".&http_date($st[9])."\r\n"); &write_keep_alive(); &write_data("\r\n"); &reset_byte_count(); while(read(FILE, $buf, 1024) > 0) { &write_data($buf); } close(FILE); $rv = &check_keep_alive(); } # log the request &log_request($acpthost, $authuser, $reqline, $cgiheader{"location"} ? "302" : $ok_code, &byte_count()); return $rv; } # http_error(code, message, body, [dontexit]) sub http_error { close(CGIOUT); local $eh = $error_handler_recurse ? undef : $config{"error_handler_$_[0]"} ? $config{"error_handler_$_[0]"} : $config{'error_handler'} ? $config{'error_handler'} : undef; if ($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); 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; $dir =~ s/\/+$//g; @bits = split(/\/+/, $dir); @fixedbits = (); $_[1] = 0; foreach $b (@bits) { if ($b eq ".") { # Do nothing.. } elsif ($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); @io = split(/\./, $_[0]); local $hn; if (!defined($hn = $ip_match_cache{$_[0]})) { $hn = gethostbyaddr(inet_aton($_[0]), AF_INET); $hn = "" if ((&to_ipaddress($hn))[0] ne $_[0]); $ip_match_cache{$_[0]} = $hn; } for($i=2; $i<@_; $i++) { local $mismatch = 0; if ($_[$i] =~ /^(\S+)\/(\S+)$/) { # 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]); } } 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; } # 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 { close(SOCK); close(MAIN); foreach $p (@passin) { close($p); } foreach $p (@passout) { close($p); } if ($logclearer) { kill('TERM', $logclearer); } exec($perl_path, $miniserv_path, @miniserv_argv); die "Failed to restart miniserv with $perl_path $miniserv_path"; } sub trigger_restart { $need_restart = 1; } sub to_ipaddress { local (@rv, $i); foreach $i (@_) { if ($i =~ /(\S+)\/(\S+)/ || $i =~ /^\*\S+$/ || $i eq 'LOCAL') { push(@rv, $i); } else { push(@rv, join('.', unpack("CCCC", inet_aton($i)))); } } return @rv; } # read_line() # Reads one line from SOCK or SSL sub read_line { local($idx, $more, $rv); if ($use_ssl) { while(($idx = index($read_buffer, "\n")) < 0) { # need to read more.. if (!($more = Net::SSLeay::read($ssl_con))) { # end of the data $rv = $read_buffer; undef($read_buffer); return $rv; } $read_buffer .= $more; } $rv = substr($read_buffer, 0, $idx+1); $read_buffer = substr($read_buffer, $idx+1); return $rv; } else { return <SOCK>; } } # read_data(length) # Reads up to some amount of data from SOCK or the SSL connection sub read_data { if ($use_ssl) { local($rv); if (length($read_buffer)) { $rv = $read_buffer; undef($read_buffer); return $rv; } else { return Net::SSLeay::read($ssl_con, $_[0]); } } else { local $buf; read(SOCK, $buf, $_[0]) || return undef; return $buf; } } # write_data(data) # Writes a string to SOCK or the SSL connection sub write_data { if ($use_ssl) { Net::SSLeay::write($ssl_con, $_[0]); } else { syswrite(SOCK, $_[0], length($_[0])); } $write_data_count += length($_[0]); } # 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(@tm, $dstr, $user, $ident, $headers); if ($config{'logident'}) { # add support for rfc1413 identity checking here } else { $ident = "-"; } @tm = localtime(time()); $dstr = sprintf "%2.2d/%s/%4.4d:%2.2d:%2.2d:%2.2d %s", $tm[3], $make_date_marr[$tm[4]], $tm[5]+1900, $tm[2], $tm[1], $tm[0], $timezone; $user = $_[1] ? $_[1] : "-"; if (fileno(MINISERVLOG)) { seek(MINISERVLOG, 0, 2); } else { open(MINISERVLOG, ">>$config{'logfile'}"); chmod(0600, $config{'logfile'}); } foreach $h (split(/\s+/, $config{'logheaders'})) { $headers .= " $h=\"$header{$h}\""; } print MINISERVLOG "$_[0] $ident $user [$dstr] \"$_[2]\" ", "$_[3] $_[4]$headers\n"; close(MINISERVLOG); } } # 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 (@_) { $mode = $_[0]; } else { $mode = &check_keep_alive(); } &write_data("Connection: ".($mode ? "Keep-Alive" : "close")."\r\n"); } sub check_keep_alive { return $header{'connection'} =~ /keep-alive/i; } sub term_handler { if (@childpids) { kill('TERM', @childpids); } exit(1); } sub http_date { local @tm = gmtime($_[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++; &write_to_sock(@_); } sub PRINTF { shift; my $fmt = shift; &write_to_sock(sprintf $fmt, @_); } sub READ { $r = shift; substr($_[0], $_[2], $_[1]) = substr($postinput, $postpos, $_[1]); $postpos += $_[1]; } sub OPEN { print STDERR "open() called - should never happen!\n"; } sub READLINE { if ($postpos >= length($postinput)) { return undef; } local $idx = index($postinput, "\n", $postpos); if ($idx < 0) { local $rv = substr($postinput, $postpos); $postpos = length($postinput); return $rv; } else { local $rv = substr($postinput, $postpos, $idx-$postpos+1); $postpos = $idx+1; return $rv; } } sub GETC { return $postpos >= length($postinput) ? undef : substr($postinput, $postpos++, 1); } sub CLOSE { } sub DESTROY { } # write_to_sock(data, ...) sub write_to_sock { foreach $d (@_) { if ($doneheaders || $miniserv::nph_script) { &write_data($d); } else { $headers .= $d; while(!$doneheaders && $headers =~ s/^(.*)(\r)?\n//) { if ($1 =~ /^(\S+):\s+(.*)$/) { $cgiheader{lc($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 $h (keys %cgiheader) { &write_data("$h: $cgiheader{$h}\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 ($doing_eval) { # A CGI program called exit! This is a horrible hack to # finish up before really exiting close(SOCK); &log_request($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 $tmp2; } # validate_user(username, password) sub validate_user { return 0 if (!$_[0] || !$users{$_[0]}); if ($users{$_[0]} eq 'x' && $use_pam) { $pam_username = $_[0]; $pam_password = $_[1]; local $pamh = new Authen::PAM("miniserv", $pam_username, \&pam_conv_func); if (!ref($pamh)) { print STDERR "PAM init failed : $pamh\n"; return 0; } local $pam_ret = $pamh->pam_authenticate(); return $pam_ret == PAM_SUCCESS ? 1 : 0; } else { return $users{$_[0]} eq crypt($_[1], $users{$_[0]}) ? 1 : 0; } } # the PAM conversation function for interactive logins sub pam_conv_func { 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; }