Annotation of loncom/auth/lonauth.pm, revision 1.89
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.89 ! albertel 4: # $Id: lonauth.pm,v 1.88 2007/07/25 22:35:47 albertel Exp $
1.27 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.1 albertel 28:
29: package Apache::lonauth;
30:
1.18 albertel 31: use strict;
1.78 albertel 32: use LONCAPA;
1.1 albertel 33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
1.26 harris41 35: use DynaLoader; # for Crypt::DES version
1.8 www 36: use Crypt::DES;
1.45 matthew 37: use Apache::loncommon();
1.66 albertel 38: use Apache::lonnet;
1.12 www 39: use Apache::lonmenu();
1.18 albertel 40: use Fcntl qw(:flock);
1.56 www 41: use Apache::lonlocal;
1.85 albertel 42:
1.1 albertel 43: # ------------------------------------------------------------ Successful login
1.85 albertel 44: sub success {
45: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
46: $form) = @_;
1.1 albertel 47:
1.85 albertel 48: # ------------------------------------------------------------ Get cookie ready
49: my $cookie =
50: &Apache::loncommon::init_user_environment($r, $username, $domain,
51: $authhost, $form,
1.86 albertel 52: {'extra_env' => $extra_env,});
1.4 www 53:
1.69 albertel 54: my $public=($username eq 'public' && $domain eq 'public');
55:
1.85 albertel 56: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78 albertel 57:
1.7 www 58: # -------------------------------------------------------------------- Log this
59:
60: &Apache::lonnet::log($domain,$username,$authhost,
61: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 62:
1.14 www 63: # ------------------------------------------------- Check for critical messages
64:
1.21 www 65: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 66: if ($what[0]) {
1.22 www 67: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 68: $lowerurl='/adm/email?critical=display';
1.14 www 69: }
70: }
71:
1.5 www 72: # ------------------------------------------------------------ Get cookie ready
1.1 albertel 73: $cookie="lonID=$cookie; path=/";
1.12 www 74: # -------------------------------------------------------- Menu script and info
1.85 albertel 75: my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
1.35 www 76: my $startupremote=&Apache::lonmenu::startupremote($lowerurl);
1.63 albertel 77: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 78: my $setflags=&Apache::lonmenu::setflags();
79: my $maincall=&Apache::lonmenu::maincall();
1.74 albertel 80: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.76 albertel 81: $startupremote,
82: {'no_inline_link' => 1,});
1.74 albertel 83: my $end_page =&Apache::loncommon::end_page();
84:
1.64 albertel 85: my $continuelink;
1.66 albertel 86: if (($env{'browser.interface'} eq 'textual') ||
87: ($env{'environment.remote'} eq 'off')) {
1.64 albertel 88: $continuelink="<a href=\"$lowerurl\">".&mt('Continue')."</a>";
89: }
1.5 www 90: # ------------------------------------------------- Output for successful login
91:
1.74 albertel 92: &Apache::loncommon::content_type($r,'text/html');
93: $r->header_out('Set-cookie' => $cookie);
94: $r->send_http_header;
1.1 albertel 95:
1.58 www 96: my %lt=&Apache::lonlocal::texthash(
97: 'wel' => 'Welcome',
98: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',
99: 'pro' => 'Problems',
100: 'log' => 'loginproblems.html',
101: );
1.1 albertel 102: $r->print(<<ENDSUCCESS);
1.74 albertel 103: $start_page
1.35 www 104: $setflags
1.19 www 105: $windowinfo
1.58 www 106: <h1>$lt{'wel'}</h1>
107: $lt{'mes'}.<p>
108: <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>
1.63 albertel 109: $remoteinfo
1.35 www 110: $maincall
1.64 albertel 111: $continuelink
1.74 albertel 112: $end_page
1.1 albertel 113: ENDSUCCESS
114: }
115:
116: # --------------------------------------------------------------- Failed login!
117:
118: sub failed {
1.85 albertel 119: my ($r,$message,$form) = @_;
1.76 albertel 120: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
121: {'no_inline_link' => 1,});
1.74 albertel 122: my $end_page = &Apache::loncommon::end_page();
123:
1.88 albertel 124: $message = &mt($message);
1.74 albertel 125: my %lt=('sorry' => &mt('Sorry ...'),
126: 'please' =>
127: &mt('Please [_1]log in again[_2].',
1.85 albertel 128: "<a href=\"/adm/login?username=$form->{'uname'}&domain=$form->{'udom'}\">",
1.74 albertel 129: '</a>'),
130: 'problemspage' => &mt('loginproblems.html'),
131: 'problems' => 'Problems',
132: );
133: &Apache::loncommon::content_type($r,'text/html');
134: $r->send_http_header;
1.1 albertel 135:
136: $r->print(<<ENDFAILED);
1.74 albertel 137: $start_page
138: <h1>$lt{'sorry'}</h1>
1.43 www 139: <p><b>$message</b></p>
1.74 albertel 140: <p>$lt{'please'}</p>
1.43 www 141: <p>
1.74 albertel 142: <a href="/adm/$lt{'problemspage'}">$lt{'problems'}</a></p>
143: $end_page
1.1 albertel 144: ENDFAILED
1.60 www 145: }
146:
1.55 www 147: # ------------------------------------------------------------------ Rerouting!
148:
149: sub reroute {
1.74 albertel 150: my ($r) = @_;
151: &Apache::loncommon::content_type($r,'text/html');
152: $r->send_http_header;
153: my $msg='<h1>Sorry ...</h1>
154: Please <a href="/">log in again</a>.';
155: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 156: }
157:
1.1 albertel 158: # ---------------------------------------------------------------- Main handler
159:
160: sub handler {
161: my $r = shift;
1.85 albertel 162: my $form;
1.55 www 163: # Are we re-routing?
164: if (-e '/home/httpd/html/lon-status/reroute.txt') {
165: &reroute($r);
166: return OK;
167: }
1.56 www 168:
1.57 www 169: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 170:
1.59 www 171: # -------------------------------- Prevent users from attempting to login twice
1.89 ! albertel 172: my $handle = &Apache::lonnet::check_for_valid_session($r);
! 173: if ($handle ne '') {
1.59 www 174: # Indeed, a valid token is found
1.89 ! albertel 175: &Apache::loncommon::content_type($r,'text/html');
! 176: $r->send_http_header;
! 177: my $start_page =
! 178: &Apache::loncommon::start_page('Already logged in');
! 179: my $end_page =
! 180: &Apache::loncommon::end_page();
! 181: $r->print(<<ENDFAILED);
1.74 albertel 182: $start_page
1.59 www 183: <h1>You are already logged in</h1>
184: <p>Please either <a href="/adm/roles">continue the current session</a> or
185: <a href="/adm/logout">logout</a>.</p>
186: <p>
187: <a href="/adm/loginproblems.html">Problems?</a></p>
1.74 albertel 188: $end_page
1.59 www 189: ENDFAILED
1.89 ! albertel 190: return OK;
1.59 www 191: }
192:
193: # ---------------------------------------------------- No valid token, continue
194:
195:
1.1 albertel 196: my $buffer;
1.84 albertel 197: if ($r->header_in('Content-length') > 0) {
198: $r->read($buffer,$r->header_in('Content-length'),0);
199: }
1.85 albertel 200: my %form;
201: foreach my $pair (split(/&/,$buffer)) {
202: my ($name,$value) = split(/=/,$pair);
1.7 www 203: $value =~ tr/+/ /;
204: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 205: $form{$name}=$value;
1.1 albertel 206: }
207:
1.85 albertel 208: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
209: &failed($r,'Username, password and domain need to be specified.',
210: \%form);
1.1 albertel 211: return OK;
212: }
1.61 www 213:
214: # split user logging in and "su"-user
215:
1.85 albertel 216: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 217: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
218: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
219: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 220:
221: my $role = $r->dir_config('lonRole');
222: my $domain = $r->dir_config('lonDefDomain');
223: my $prodir = $r->dir_config('lonUsersDir');
224:
1.8 www 225: # ---------------------------------------- Get the information from login token
226:
1.85 albertel 227: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
228: $form{'serverid'});
1.8 www 229:
230: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.85 albertel 231: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 232: return OK;
1.44 www 233: } else {
1.85 albertel 234: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
235: $form{'serverid'});
1.77 albertel 236: if ( $reply ne 'ok' ) {
1.85 albertel 237: &failed($r,'Session could not be opened.',\%form);
238: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 239: return OK;
1.44 www 240: }
1.8 www 241: }
1.9 www 242: my ($key,$firsturl)=split(/&/,$tmpinfo);
1.8 www 243:
244: my $keybin=pack("H16",$key);
245:
1.26 harris41 246: my $cipher;
247: if ($Crypt::DES::VERSION>=2.03) {
248: $cipher=new Crypt::DES $keybin;
249: }
250: else {
251: $cipher=new DES $keybin;
252: }
1.67 www 253: my $upass='';
254: for (my $i=0;$i<=2;$i++) {
255: my $chunk=
1.85 albertel 256: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 257:
1.67 www 258: $chunk.=
1.85 albertel 259: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 260:
1.67 www 261: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
262: $upass.=$chunk;
263: }
1.8 www 264:
1.1 albertel 265: # ---------------------------------------------------------------- Authenticate
1.85 albertel 266: my $authhost=Apache::lonnet::authenticate($form{'uname'},
1.8 www 267: $upass,
1.85 albertel 268: $form{'udom'});
1.1 albertel 269:
270: # --------------------------------------------------------------------- Failed?
271:
272: if ($authhost eq 'no_host') {
1.85 albertel 273: &failed($r,'Username and/or password could not be authenticated.',
274: \%form);
1.1 albertel 275: return OK;
276: }
277:
1.59 www 278: if (($firsturl eq '') ||
279: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 280: $firsturl='/adm/roles';
1.7 www 281: }
1.61 www 282: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 283: if ($form{'suname'}) {
1.61 www 284: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 285: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 286: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 287: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 288: eq 'no_host') {
1.85 albertel 289: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 290: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 291: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 292: # -------------------------------------------------------- actually switch users
1.85 albertel 293: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
294: ' logging in as '.$form{'suname'});
295: $form{'uname'}=$form{'suname'};
1.61 www 296: } else {
297: &Apache::lonnet::logthis('Attempted switch user to privileged user');
298: }
299: }
300: } else {
301: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
302: }
303: }
1.85 albertel 304:
1.81 albertel 305: if ($r->dir_config("lonBalancer") eq 'yes') {
1.85 albertel 306: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
307: \%form);
1.81 albertel 308: $r->internal_redirect('/adm/switchserver');
309: } else {
1.85 albertel 310: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
311: \%form);
1.81 albertel 312: }
1.1 albertel 313: return OK;
314: }
315:
316: 1;
317: __END__
1.7 www 318:
319:
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