1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.102 2010/03/10 21:25:29 droeschl Exp $
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: #
28:
29: package Apache::lonauth;
30:
31: use strict;
32: use LONCAPA;
33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use DynaLoader; # for Crypt::DES version
36: use Crypt::DES;
37: use Apache::loncommon();
38: use Apache::lonnet;
39: use Apache::lonmenu();
40: use Apache::createaccount;
41: use Fcntl qw(:flock);
42: use Apache::lonlocal;
43: use HTML::Entities;
44:
45: # ------------------------------------------------------------ Successful login
46: sub success {
47: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
48: $form) = @_;
49:
50: # ------------------------------------------------------------ Get cookie ready
51: my $cookie =
52: &Apache::loncommon::init_user_environment($r, $username, $domain,
53: $authhost, $form,
54: {'extra_env' => $extra_env,});
55:
56: my $public=($username eq 'public' && $domain eq 'public');
57:
58: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
59:
60: # -------------------------------------------------------------------- Log this
61:
62: &Apache::lonnet::log($domain,$username,$authhost,
63: "Login $ENV{'REMOTE_ADDR'}");
64:
65: # ------------------------------------------------- Check for critical messages
66:
67: my @what=&Apache::lonnet::dump('critical',$domain,$username);
68: if ($what[0]) {
69: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
70: $lowerurl='/adm/email?critical=display';
71: }
72: }
73:
74: # ------------------------------------------------------------ Get cookie ready
75: $cookie="lonID=$cookie; path=/";
76: # -------------------------------------------------------- Menu script and info
77: my $destination = $lowerurl;
78:
79: if (defined($form->{role})) {
80: my $envkey = 'user.role.'.$form->{role};
81: my $now=time;
82: my $then=$env{'user.login.time'};
83: my $refresh=$env{'user.refresh.time'};
84: if (exists($env{$envkey})) {
85: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
86: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
87: \$trolecode,\$tstatus,\$tstart,\$tend);
88: if ($tstatus eq 'is') {
89: $destination .= ($destination =~ /\?/) ? '&' : '?';
90: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
91: $destination .= 'selectrole=1&'.$newrole.'=1';
92: }
93: }
94: }
95: if (defined($form->{symb})) {
96: my $destsymb = $form->{symb};
97: $destination .= ($destination =~ /\?/) ? '&' : '?';
98: if ($destsymb =~ /___/) {
99: # FIXME Need to deal with encrypted symbs and urls as needed.
100: my ($map,$resid,$desturl)=split(/___/,$destsymb);
101: unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
102: $desturl = &Apache::lonnet::clutter($desturl);
103: }
104: $desturl = &HTML::Entities::encode($desturl,'"<>&');
105: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
106: $destination .= '&destinationurl='.$desturl.
107: '&destsymb='.$destsymb;
108: } else {
109: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
110: $destination .= '&destinationurl='.$destsymb;
111: }
112: }
113:
114: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
115: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
116: my $brcrum = [{'href' => '',
117: 'text' => 'Successful Login'},];
118: my $start_page=&Apache::loncommon::start_page('Successful Login',
119: $header,
120: {'no_inline_link' => 1,
121: 'bread_crumbs' => $brcrum,});
122: my $end_page =&Apache::loncommon::end_page();
123:
124: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
125: # ------------------------------------------------- Output for successful login
126:
127: &Apache::loncommon::content_type($r,'text/html');
128: $r->header_out('Set-cookie' => $cookie);
129: $r->send_http_header;
130:
131: my %lt=&Apache::lonlocal::texthash(
132: 'wel' => 'Welcome',
133: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
134: 'pro' => 'Login problems?',
135: 'log' => 'loginproblems.html',
136: );
137: $r->print(<<ENDSUCCESS);
138: $start_page
139: $windowinfo
140: <h1>$lt{'wel'}</h1>
141: $lt{'mes'}<p>
142: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
143: $continuelink
144: $end_page
145: ENDSUCCESS
146: }
147:
148: # --------------------------------------------------------------- Failed login!
149:
150: sub failed {
151: my ($r,$message,$form) = @_;
152: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
153: {'no_inline_link' => 1,});
154: my $retry = '/adm/login?username='.$form->{'uname'}.
155: '&domain='.$form->{'udom'};
156: if (exists($form->{role})) {
157: $retry .= '&role='.$form->{role};
158: }
159: if (exists($form->{symb})) {
160: $retry .= '&symb='.$form->{symb};
161: }
162: my $end_page = &Apache::loncommon::end_page();
163: &Apache::loncommon::content_type($r,'text/html');
164: $r->send_http_header;
165: $r->print(
166: $start_page
167: .'<h1>'.&mt('Sorry ...').'</h1>'
168: .'<p class="LC_warning">'.&mt($message).'</p>'
169: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
170: .'</p>'
171: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
172: .$end_page
173: );
174: }
175:
176: # ------------------------------------------------------------------ Rerouting!
177:
178: sub reroute {
179: my ($r) = @_;
180: &Apache::loncommon::content_type($r,'text/html');
181: $r->send_http_header;
182: my $msg='<h1>'.&mt('Sorry ...').'</h1>'
183: .&mt('Please [_1]log in again[_2].');
184: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
185: }
186:
187: # ---------------------------------------------------------------- Main handler
188:
189: sub handler {
190: my $r = shift;
191: my $form;
192: # Are we re-routing?
193: if (-e '/home/httpd/html/lon-status/reroute.txt') {
194: &reroute($r);
195: return OK;
196: }
197:
198: &Apache::lonlocal::get_language_handle($r);
199:
200: # -------------------------------- Prevent users from attempting to login twice
201: my $handle = &Apache::lonnet::check_for_valid_session($r);
202: if ($handle ne '') {
203: # Indeed, a valid token is found
204: &Apache::loncommon::content_type($r,'text/html');
205: $r->send_http_header;
206: my $start_page =
207: &Apache::loncommon::start_page('Already logged in');
208: my $end_page =
209: &Apache::loncommon::end_page();
210: $r->print(
211: $start_page
212: .'<h1>'.&mt('You are already logged in!').'</h1>'
213: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
214: ,'<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>')
215: .'</p>'
216: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
217: .$end_page
218: );
219: return OK;
220: }
221:
222: # ---------------------------------------------------- No valid token, continue
223:
224:
225: my $buffer;
226: if ($r->header_in('Content-length') > 0) {
227: $r->read($buffer,$r->header_in('Content-length'),0);
228: }
229: my %form;
230: foreach my $pair (split(/&/,$buffer)) {
231: my ($name,$value) = split(/=/,$pair);
232: $value =~ tr/+/ /;
233: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
234: $form{$name}=$value;
235: }
236:
237: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
238: &failed($r,'Username, password and domain need to be specified.',
239: \%form);
240: return OK;
241: }
242:
243: # split user logging in and "su"-user
244:
245: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
246: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
247: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
248: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
249:
250: my $role = $r->dir_config('lonRole');
251: my $domain = $r->dir_config('lonDefDomain');
252: my $prodir = $r->dir_config('lonUsersDir');
253: my $contact_name = &mt('LON-CAPA helpdesk');
254:
255: # ---------------------------------------- Get the information from login token
256:
257: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
258: $form{'serverid'});
259:
260: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
261: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
262: return OK;
263: } else {
264: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
265: $form{'serverid'});
266: if ( $reply ne 'ok' ) {
267: &failed($r,'Session could not be opened.',\%form);
268: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
269: return OK;
270: }
271: }
272:
273: if (!&Apache::lonnet::domain($form{'udom'})) {
274: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
275: return OK;
276: }
277:
278: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
279: if ($rolestr) {
280: $rolestr = &unescape($rolestr);
281: }
282: if ($symbstr) {
283: $symbstr= &unescape($symbstr);
284: }
285: if ($rolestr =~ /^role=/) {
286: (undef,$form{'role'}) = split('=',$rolestr);
287: }
288: if ($symbstr =~ /^symb=/) {
289: (undef,$form{'symb'}) = split('=',$symbstr);
290: }
291:
292: my $keybin=pack("H16",$key);
293:
294: my $cipher;
295: if ($Crypt::DES::VERSION>=2.03) {
296: $cipher=new Crypt::DES $keybin;
297: }
298: else {
299: $cipher=new DES $keybin;
300: }
301: my $upass='';
302: for (my $i=0;$i<=2;$i++) {
303: my $chunk=
304: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
305:
306: $chunk.=
307: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
308:
309: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
310: $upass.=$chunk;
311: }
312:
313: # ---------------------------------------------------------------- Authenticate
314: my @cancreate;
315: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
316: if (ref($domconfig{'usercreation'}) eq 'HASH') {
317: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
318: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
319: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
320: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
321: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
322: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
323: }
324: }
325: }
326: my $defaultauth;
327: if (grep(/^login$/,@cancreate)) {
328: $defaultauth = 1;
329: }
330: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
331: $form{'udom'},$defaultauth);
332:
333: # --------------------------------------------------------------------- Failed?
334:
335: if ($authhost eq 'no_host') {
336: &failed($r,'Username and/or password could not be authenticated.',
337: \%form);
338: return OK;
339: } elsif ($authhost eq 'no_account_on_host') {
340: my %domconfig =
341: &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
342: if (grep(/^login$/,@cancreate)) {
343: my $start_page =
344: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
345: '',{'no_inline_link' => 1,});
346: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
347: my $lonhost = $r->dir_config('lonHostID');
348: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
349: my $contacts =
350: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
351: $form{'udom'},$origmail);
352: my ($contact_email) = split(',',$contacts);
353: my $output = &Apache::createaccount::username_check($form{'uname'},
354: $form{'udom'},$domdesc,'',
355: $lonhost,$contact_email,$contact_name);
356: &Apache::loncommon::content_type($r,'text/html');
357: $r->send_http_header;
358: &Apache::createaccount::print_header($r,$start_page);
359: $r->print('<h3>'.&mt('Account creation').'</h3>'.
360: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
361: $output.&Apache::loncommon::end_page());
362: return OK;
363: } else {
364: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
365: return OK;
366: }
367: }
368:
369: if (($firsturl eq '') ||
370: ($firsturl=~/^\/adm\/(logout|remote)/)) {
371: $firsturl='/adm/roles';
372: }
373: # --------------------------------- Are we attempting to login as somebody else?
374: if ($form{'suname'}) {
375: # ------------ see if the original user has enough privileges to pull this stunt
376: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
377: # ---------------------------------------------------- see if the su-user exists
378: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
379: eq 'no_host') {
380: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
381: # ------------------------------ see if the su-user is not too highly privileged
382: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
383: # -------------------------------------------------------- actually switch users
384: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
385: ' logging in as '.$form{'suname'});
386: $form{'uname'}=$form{'suname'};
387: } else {
388: &Apache::lonnet::logthis('Attempted switch user to privileged user');
389: }
390: }
391: } else {
392: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
393: }
394: }
395:
396: if ($r->dir_config("lonBalancer") eq 'yes') {
397: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
398: \%form);
399: $r->internal_redirect('/adm/switchserver');
400: } else {
401: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
402: \%form);
403: }
404: return OK;
405: }
406:
407: 1;
408: __END__
409:
410:
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