--- loncom/auth/lonauth.pm 2013/08/28 14:12:56 1.121.2.5 +++ loncom/auth/lonauth.pm 2021/12/16 21:48:19 1.121.2.23 @@ -1,7 +1,7 @@ # The LearningOnline Network # User Authentication Module # -# $Id: lonauth.pm,v 1.121.2.5 2013/08/28 14:12:56 raeburn Exp $ +# $Id: lonauth.pm,v 1.121.2.23 2021/12/16 21:48:19 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -32,8 +32,6 @@ use strict; use LONCAPA; use Apache::Constants qw(:common); use CGI qw(:standard); -use DynaLoader; # for Crypt::DES version -use Crypt::DES; use Apache::loncommon(); use Apache::lonnet; use Apache::lonmenu(); @@ -42,11 +40,12 @@ use Fcntl qw(:flock); use Apache::lonlocal; use Apache::File(); use HTML::Entities; +use Digest::MD5; # ------------------------------------------------------------ Successful login sub success { my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, - $form) = @_; + $form,$cid,$expirepub) = @_; # ------------------------------------------------------------ Get cookie ready my $cookie = @@ -60,8 +59,9 @@ sub success { # -------------------------------------------------------------------- Log this + my $ip = &Apache::lonnet::get_requestor_ip(); &Apache::lonnet::log($domain,$username,$authhost, - "Login $ENV{'REMOTE_ADDR'}"); + "Login $ip"); # ------------------------------------------------- Check for critical messages @@ -72,8 +72,27 @@ sub success { } } -# ------------------------------------------------------------ Get cookie ready - $cookie="lonID=$cookie; path=/"; +# ------------------------------------------------------------ Get cookies ready + my ($securecookie,$defaultcookie); + my $ssl = $r->subprocess_env('https'); + if ($ssl) { + $securecookie="lonSID=$cookie; path=/; HttpOnly; secure"; + my $lonidsdir=$r->dir_config('lonIDsDir'); + if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) { + my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked'; + if (-e "$lonidsdir/$linkname.id") { + unlink("$lonidsdir/$linkname.id"); + } + my $made_symlink = eval { symlink("$lonidsdir/$cookie.id", + "$lonidsdir/$linkname.id"); 1 }; + if ($made_symlink) { + $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;"; + &Apache::lonnet::appenv({'user.linkedenv' => $linkname}); + } + } + } else { + $defaultcookie = "lonID=$cookie; path=/; HttpOnly;"; + } # -------------------------------------------------------- Menu script and info my $destination = $lowerurl; @@ -99,20 +118,28 @@ sub success { } if (defined($form->{symb})) { my $destsymb = $form->{symb}; + my $encrypted; + if ($destsymb =~ m{^/enc/}) { + $encrypted = 1; + if ($cid) { + $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid); + } + } $destination .= ($destination =~ /\?/) ? '&' : '?'; if ($destsymb =~ /___/) { - # FIXME Need to deal with encrypted symbs and urls as needed. my ($map,$resid,$desturl)=split(/___/,$destsymb); - unless ($desturl=~/^(adm|editupload|public)/) { - $desturl = &Apache::lonnet::clutter($desturl); + $desturl = &Apache::lonnet::clutter($desturl); + if ($encrypted) { + $desturl = &Apache::lonenc::encrypted($desturl,1,$cid); + $destsymb = $form->{symb}; } $desturl = &HTML::Entities::encode($desturl,'"<>&'); $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); - $destination .= '&destinationurl='.$desturl. + $destination .= 'destinationurl='.$desturl. '&destsymb='.$destsymb; - } else { + } elsif (!$encrypted) { $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); - $destination .= '&destinationurl='.$destsymb; + $destination .= 'destinationurl='.$destsymb; } } if ($destination =~ m{^/adm/roles}) { @@ -140,7 +167,18 @@ sub success { # ------------------------------------------------- Output for successful login &Apache::loncommon::content_type($r,'text/html'); - $r->header_out('Set-cookie' => $cookie); + if ($securecookie) { + $r->headers_out->add('Set-cookie' => $securecookie); + } + if ($defaultcookie) { + $r->headers_out->add('Set-cookie' => $defaultcookie); + } + if ($expirepub) { + my $c = new CGI::Cookie(-name => 'lonPubID', + -value => '', + -expires => '-10y',); + $r->headers_out->add('Set-cookie' => $c); + } $r->send_http_header; my %lt=&Apache::lonlocal::texthash( @@ -165,36 +203,74 @@ $maincall $continuelink $end_page ENDSUCCESS + return; } # --------------------------------------------------------------- Failed login! sub failed { - my ($r,$message,$form) = @_; - my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef); - my $retry = '/adm/login?username='.$form->{'uname'}. - '&domain='.$form->{'udom'}; - if (exists($form->{role})) { - $retry .= '&role='.$form->{role}; + my ($r,$message,$form,$authhost) = @_; + (undef,undef,undef,my $clientmathml,my $clientunicode) = + &Apache::loncommon::decode_user_agent(); + my $args = {}; + if ($clientunicode && !$clientmathml) { + $args = {'browser.unicode' => 1}; + } + + my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args); + my $uname = &Apache::loncommon::cleanup_html($form->{'uname'}); + my $udom = &Apache::loncommon::cleanup_html($form->{'udom'}); + if (&Apache::lonnet::domain($udom,'description') eq '') { + undef($udom); + } + my $retry = '/adm/login'; + if ($uname eq $form->{'uname'}) { + $retry .= '?username='.$uname; } - if (exists($form->{symb})) { - $retry .= '&symb='.$form->{symb}; + if ($udom) { + $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom; } - my $end_page = &Apache::loncommon::end_page(); + my $lonhost = $r->dir_config('lonHostID'); + my $querystr; + my $result = &set_retry_token($form,$lonhost,\$querystr); + if ($result eq 'fail') { + if (exists($form->{role})) { + my $role = &Apache::loncommon::cleanup_html($form->{role}); + if ($role ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'role='.$role; + } + } + if (exists($form->{symb})) { + my $symb = &Apache::loncommon::cleanup_html($form->{symb}); + if ($symb ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb; + } + } + if (exists($form->{firsturl})) { + my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl}); + if ($firsturl ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl; + } + } + } elsif ($querystr ne '') { + $retry .= (($retry=~/\?/)?'&':'?').$querystr; + } + my $end_page = &Apache::loncommon::end_page(); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - my $loginhelp = &loginhelpdisplay($form->{'udom'}); + my @actions = + (&mt('Please [_1]log in again[_2].','','')); + my $loginhelp = &loginhelpdisplay($udom); if ($loginhelp) { - $loginhelp = '

'.&mt('Login problems?').'

'; + push(@actions, ''.&mt('Login problems?').''); } + #FIXME: link to helpdesk might be added here $r->print( $start_page - .'

'.&mt('Sorry ...').'

' - .'

'.&mt($message).'

' - .'

'.&mt('Please [_1]log in again[_2].','','') - .'

' - .$loginhelp + .'

'.&mt('Sorry ...').'

' + .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'

' + .&Apache::lonhtmlcommon::actionbox(\@actions) .$end_page ); } @@ -215,7 +291,6 @@ sub reroute { sub handler { my $r = shift; my $londocroot = $r->dir_config('lonDocRoot'); - my $form; # Are we re-routing? if (-e "$londocroot/lon-status/reroute.txt") { &reroute($r); @@ -241,8 +316,24 @@ sub handler { my $end_page = &Apache::loncommon::end_page(); my $dest = '/adm/roles'; - if ($env{'form.firsturl'} ne '') { - $dest = $env{'form.firsturl'}; + my %form = &get_form_items($r); + if ($form{'logtoken'}) { + my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, + $form{'serverid'}); + unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || + ($tmpinfo eq 'no_such_host')) { + my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); + $firsturl = &unescape($firsturl); + my %info; + foreach my $item (@rest) { + my ($key,$value) = split(/=/,$item); + $info{$key} = &unescape($value); + } + if ($firsturl ne '') { + $info{'firsturl'} = $firsturl; + $dest = $firsturl; + } + } } $r->print( $start_page @@ -258,19 +349,7 @@ sub handler { # ---------------------------------------------------- No valid token, continue - - my $buffer; - if ($r->header_in('Content-length') > 0) { - $r->read($buffer,$r->header_in('Content-length'),0); - } - my %form; - foreach my $pair (split(/&/,$buffer)) { - my ($name,$value) = split(/=/,$pair); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $form{$name}=$value; - } - + my %form = &get_form_items($r); if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { &failed($r,'Username, password and domain need to be specified.', \%form); @@ -279,10 +358,11 @@ sub handler { # split user logging in and "su"-user - ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); + ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'}); $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); - $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); + $form{'udom'} = &LONCAPA::clean_domain($form{'udom'}); + $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'}); my $role = $r->dir_config('lonRole'); my $domain = $r->dir_config('lonDefDomain'); @@ -313,40 +393,13 @@ sub handler { return OK; } - my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo); - if ($rolestr) { - $rolestr = &unescape($rolestr); - } - if ($symbstr) { - $symbstr= &unescape($symbstr); - } - if ($rolestr =~ /^role=/) { - (undef,$form{'role'}) = split('=',$rolestr); - } - if ($symbstr =~ /^symb=/) { - (undef,$form{'symb'}) = split('=',$symbstr); - } - - my $keybin=pack("H16",$key); - - my $cipher; - if ($Crypt::DES::VERSION>=2.03) { - $cipher=new Crypt::DES $keybin; - } - else { - $cipher=new DES $keybin; - } - my $upass=''; - for (my $i=0;$i<=2;$i++) { - my $chunk= - $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); - - $chunk.= - $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); - - $chunk=substr($chunk,1,ord(substr($chunk,0,1))); - $upass.=$chunk; + my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); + $firsturl = &unescape($firsturl); + foreach my $item (@rest) { + my ($key,$value) = split(/=/,$item); + $form{$key} = &unescape($value); } + my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'}); # ---------------------------------------------------------------- Authenticate @@ -407,22 +460,81 @@ sub handler { ($firsturl=~/^\/adm\/(logout|remote)/)) { $firsturl='/adm/roles'; } + + my ($hosthere,%sessiondata); + if ($form{'iptoken'}) { + %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'}); + my $delete = &Apache::lonnet::tmpdel($form{'iptoken'}); + if (($sessiondata{'domain'} eq $form{'udom'}) && + ($sessiondata{'username'} eq $form{'uname'})) { + $hosthere = 1; + } + } + # --------------------------------- Are we attempting to login as somebody else? if ($form{'suname'}) { + my ($suname,$sudom,$sudomref); + $suname = $form{'suname'}; + $sudom = $form{'udom'}; + if ($form{'sudom'}) { + unless ($sudom eq $form{'sudom'}) { + if (&Apache::lonnet::domain($form{'sudom'})) { + $sudomref = [$form{'sudom'}]; + $sudom = $form{'sudom'}; + } + } + } # ------------ see if the original user has enough privileges to pull this stunt - if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { + if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) { # ---------------------------------------------------- see if the su-user exists - unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) - eq 'no_host') { - &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); + unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') { # ------------------------------ see if the su-user is not too highly privileged - unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { + if (&Apache::lonnet::privileged($suname,$sudom)) { + &Apache::lonnet::logthis('Attempted switch user to privileged user'); + } else { + my $noprivswitch; +# +# su-user's home server and user's home server must have one of: +# (a) same domain +# (b) same primary library server for the two domains +# (c) same "internet domain" for primary library server(s) for home servers' domains +# + my $suprim = &Apache::lonnet::domain($sudom,'primary'); + my $suintdom = &Apache::lonnet::internet_dom($suprim); + unless ($sudom eq $form{'udom'}) { + my $uprim = &Apache::lonnet::domain($form{'udom'},'primary'); + my $uintdom = &Apache::lonnet::internet_dom($uprim); + unless ($suprim eq $uprim) { + unless ($suintdom eq $uintdom) { + &Apache::lonnet::logthis('Attempted switch user ' + .'to user with different "internet domain".'); + $noprivswitch = 1; + } + } + } + + unless ($noprivswitch) { +# +# server where log-in occurs must have same "internet domain" as su-user's home +# server +# + my $lonhost = $r->dir_config('lonHostID'); + my $hostintdom = &Apache::lonnet::internet_dom($lonhost); + if ($hostintdom ne $suintdom) { + &Apache::lonnet::logthis('Attempted switch user on a ' + .'server with a different "internet domain".'); + } else { + # -------------------------------------------------------- actually switch users - &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. - ' logging in as '.$form{'suname'}); - $form{'uname'}=$form{'suname'}; - } else { - &Apache::lonnet::logthis('Attempted switch user to privileged user'); + + &Apache::lonnet::logperm('User '.$form{'uname'}.' at '. + $form{'udom'}.' logging in as '.$suname.':'.$sudom); + $form{'uname'}=$suname; + if ($form{'udom'} ne $sudom) { + $form{'udom'}=$sudom; + } + } + } } } } else { @@ -430,18 +542,51 @@ sub handler { } } - my ($is_balancer,$otherserver) = - &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); + my ($is_balancer,$otherserver); - if ($is_balancer) { - if (!$otherserver) { - ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); + unless ($hosthere) { + ($is_balancer,$otherserver) = + &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login'); + if ($is_balancer) { + # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) + my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r); + if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) { + $otherserver = $found_server; + } + if ($otherserver eq '') { + my $lowest_load; + ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'}); + if ($lowest_load > 100) { + $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'}); + } + } + if ($otherserver ne '') { + my @hosts = &Apache::lonnet::current_machine_ids(); + if (grep(/^\Q$otherserver\E$/,@hosts)) { + $hosthere = $otherserver; + } + } } + } + + if (($is_balancer) && (!$hosthere)) { if ($otherserver) { &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, \%form); - $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); + my $switchto = '/adm/switchserver?otherserver='.$otherserver; + if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { + $switchto .= '&origurl='.$firsturl; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + $r->internal_redirect($switchto); } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; $r->print(&noswitch()); } return OK; @@ -451,8 +596,20 @@ sub handler { if ($otherserver) { &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, \%form); - $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); + my $switchto = '/adm/switchserver?otherserver='.$otherserver; + if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { + $switchto .= '&origurl='.$firsturl; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + $r->internal_redirect($switchto); } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; $r->print(&noswitch()); } return OK; @@ -473,7 +630,7 @@ sub handler { # ---------------------------------------------------------- Are we overloaded? if ((($userloadpercent>100.0)||($loadpercent>100.0))) { - my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); + my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'}); if (!$unloaded) { ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); } @@ -484,12 +641,73 @@ sub handler { return OK; } } + if (($is_balancer) && ($hosthere)) { + $form{'noloadbalance'} = $hosthere; + } + my $extra_env; + if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) { + if ($sessiondata{'origurl'} ne '') { + $firsturl = $sessiondata{'origurl'}; + $form{'firsturl'} = $sessiondata{'origurl'}; + my @names = ('role','symb','linkprot','linkkey'); + foreach my $item (@names) { + if ($sessiondata{$item} ne '') { + $form{$item} = $sessiondata{$item}; + } + } + } + } &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, \%form); return OK; } } +sub get_form_items { + my ($r) = @_; + my $buffer; + if ($r->header_in('Content-length') > 0) { + $r->read($buffer,$r->header_in('Content-length'),0); + } + my %form; + foreach my $pair (split(/&/,$buffer)) { + my ($name,$value) = split(/=/,$pair); + $value =~ tr/+/ /; + $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; + $form{$name}=$value; + } + return %form; +} + +sub set_retry_token { + my ($form,$lonhost,$querystr) = @_; + if (ref($form) eq 'HASH') { + my ($firsturl,$token,$extras,@names); + @names = ('role','symb','iptoken'); + foreach my $name (@names) { + if ($form->{$name} ne '') { + $extras .= '&'.$name.'='.&escape($form->{$name}); + last if ($name eq 'linkprot'); + } + } + my $firsturl = $form->{'firsturl'}; + if (($firsturl ne '') || ($extras ne '')) { + $extras .= ':retry'; + $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl). + $extras,$lonhost); + if (($token eq 'con_lost') || ($token eq 'no_such_host')) { + return 'fail'; + } else { + if (ref($querystr)) { + $$querystr = 'retry='.$token; + } + return 'ok'; + } + } + } + return; +} + sub check_can_host { my ($r,$form,$authhost,$domdesc) = @_; return unless (ref($form) eq 'HASH'); @@ -530,6 +748,8 @@ sub check_can_host { if ($login_host ne '') { my $protocol = $Apache::lonnet::protocol{$login_host}; $protocol = 'http' if ($protocol ne 'https'); + my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host); + $hostname = $alias if ($alias ne ''); my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). '

'.&mt('Account creation').'

'.