1 package C4::Auth_with_ldap;
3 # Copyright 2000-2002 Katipo Communications
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 2 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #use warnings; FIXME - Bug 2505
22 use Digest::MD5 qw(md5_base64);
26 use C4::Members qw(AddMember changepassword);
27 use C4::Members::Attributes;
28 use C4::Members::AttributeTypes;
29 use C4::Utils qw( :all );
30 use List::MoreUtils qw( any );
32 use Net::LDAP::Filter;
34 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $debug);
38 $VERSION = 3.08.01.002; # set the version for version checking
40 @EXPORT = qw( checkpw_ldap );
43 # Redefine checkpw_ldap:
44 # connect to LDAP (named or anonymous)
45 # ~ retrieves $userid from KOHA_CONF mapping
46 # ~ then compares $password with userPassword
47 # ~ then gets the LDAP entry
48 # ~ and calls the memberadd if necessary
50 sub ldapserver_error ($) {
51 return sprintf('No ldapserver "%s" defined in KOHA_CONF: ' . $ENV{KOHA_CONF}, shift);
54 use vars qw($mapping @ldaphosts $base $ldapname $ldappassword);
55 my $context = C4::Context->new() or die 'C4::Context->new failed';
56 my $ldap = C4::Context->config("ldapserver") or die 'No "ldapserver" in server hash from KOHA_CONF: ' . $ENV{KOHA_CONF};
57 my $prefhost = $ldap->{hostname} or die ldapserver_error('hostname');
58 my $base = $ldap->{base} or die ldapserver_error('base');
59 $ldapname = $ldap->{user} ;
60 $ldappassword = $ldap->{pass} ;
61 our %mapping = %{$ldap->{mapping}}; # FIXME dpavlin -- don't die because of || (); from 6eaf8511c70eb82d797c941ef528f4310a15e9f9
62 my @mapkeys = keys %mapping;
63 $debug and print STDERR "Got ", scalar(@mapkeys), " ldap mapkeys ( total ): ", join ' ', @mapkeys, "\n";
64 @mapkeys = grep {defined $mapping{$_}->{is}} @mapkeys;
65 $debug and print STDERR "Got ", scalar(@mapkeys), " ldap mapkeys (populated): ", join ' ', @mapkeys, "\n";
68 anonymous => ($ldapname and $ldappassword) ? 0 : 1,
69 replicate => defined($ldap->{replicate}) ? $ldap->{replicate} : 1, # add from LDAP to Koha database for new user
70 update => defined($ldap->{update} ) ? $ldap->{update} : 1, # update from LDAP to Koha database for existing user
74 my $result = shift or return undef;
75 return "LDAP error #" . $result->code
76 . ": " . $result->error_name . "\n"
77 . "# " . $result->error_text . "\n";
81 my $db = shift or return;
82 my $userid = shift or return;
83 my $uid_field = $mapping{userid}->{is} or die ldapserver_error("mapping for 'userid'");
84 my $filter = Net::LDAP::Filter->new("$uid_field=$userid") or die "Failed to create new Net::LDAP::Filter";
85 my $search = $db->search(
89 ) or die "LDAP search failed to return object.";
90 my $count = $search->count;
91 if ($search->code > 0) {
92 warn sprintf("LDAP Auth rejected : %s gets %d hits\n", $filter->as_string, $count) . description($search);
96 warn sprintf("LDAP Auth rejected : %s gets %d hits\n", $filter->as_string, $count);
103 my ($dbh, $userid, $password) = @_;
104 my @hosts = split(',', $prefhost);
105 my $db = Net::LDAP->new(\@hosts);
107 warn "LDAP connexion failed";
111 #$debug and $db->debug(5);
113 if ( $ldap->{auth_by_bind} ) {
114 my $principal_name = $ldap->{principal_name};
115 if ($principal_name and $principal_name =~ /\%/) {
116 $principal_name = sprintf($principal_name,$userid);
118 $principal_name = $userid;
120 my $res = $db->bind( $principal_name, password => $password );
122 $debug and warn "LDAP bind failed as kohauser $principal_name: ". description($res);
126 # FIXME dpavlin -- we really need $userldapentry leater on even if using auth_by_bind!
130 # a $userldapentry is only needed if either updating or replicating are enabled
131 if($config{update} or $config{replicate}) {
132 my $search = search_method($db, $userid) or return 0; # warnings are in the sub
133 $userldapentry = $search->shift_entry;
137 my $res = ($config{anonymous}) ? $db->bind : $db->bind($ldapname, password=>$ldappassword);
138 if ($res->code) { # connection refused
139 warn "LDAP bind failed as ldapuser " . ($ldapname || '[ANONYMOUS]') . ": " . description($res);
142 my $search = search_method($db, $userid) or return 0; # warnings are in the sub
143 $userldapentry = $search->shift_entry;
144 my $cmpmesg = $db->compare( $userldapentry, attr=>'userpassword', value => $password );
145 if ($cmpmesg->code != 6) {
146 warn "LDAP Auth rejected : invalid password for user '$userid'. " . description($cmpmesg);
151 # To get here, LDAP has accepted our user's login attempt.
152 # But we still have work to do. See perldoc below for detailed breakdown.
155 my ($borrowernumber,$cardnumber,$local_userid,$savedpw) = exists_local($userid);
157 if (( $borrowernumber and $config{update} ) or
158 (!$borrowernumber and $config{replicate}) ) {
159 %borrower = ldap_entry_2_hash($userldapentry,$userid);
160 $debug and print STDERR "checkpw_ldap received \%borrower w/ " . keys(%borrower), " keys: ", join(' ', keys %borrower), "\n";
163 if ($borrowernumber) {
164 if ($config{update}) { # A1, B1
165 my $c2 = &update_local($local_userid,$password,$borrowernumber,\%borrower) || '';
166 ($cardnumber eq $c2) or warn "update_local returned cardnumber '$c2' instead of '$cardnumber'";
168 # maybe update just the password?
169 return(1, $cardnumber, $local_userid);
171 } elsif ($config{replicate}) { # A2, C2
172 $borrowernumber = AddMember(%borrower) or die "AddMember failed";
176 if (C4::Context->preference('ExtendedPatronAttributes') && $borrowernumber && ($config{update} ||$config{replicate})) {
177 my @types = C4::Members::AttributeTypes::GetAttributeTypes();
178 my @attributes = grep{my $key=$_; any{$_ eq $key}@types;} keys %borrower;
179 my $extended_patron_attributes;
180 @{$extended_patron_attributes} =
181 map { { code => $_, value => $borrower{$_} } } @attributes;
184 for (my $i; $i< scalar(@$extended_patron_attributes)-1;$i++) {
185 my $attr=$extended_patron_attributes->[$i];
186 unless (C4::Members::Attributes::CheckUniqueness($attr->{code}, $attr->{value}, $borrowernumber)) {
188 warn "ERROR_extended_unique_id_failed $attr->{code} $attr->{value}";
191 #Removing erroneous attributes
192 foreach my $index (@errors){
193 @$extended_patron_attributes=splice(@$extended_patron_attributes,$index,1);
195 C4::Members::Attributes::SetBorrowerAttributes($borrowernumber, $extended_patron_attributes);
197 return(1, $cardnumber, $userid);
200 # Pass LDAP entry object and local cardnumber (userid).
201 # Returns borrower hash.
202 # Edit KOHA_CONF so $memberhash{'xxx'} fits your ldap structure.
203 # Ensure that mandatory fields are correctly filled!
205 sub ldap_entry_2_hash ($$) {
206 my $userldapentry = shift;
207 my %borrower = ( cardnumber => shift );
209 $userldapentry->exists('uid'); # This is bad, but required! By side-effect, this initializes the attrs hash.
211 print STDERR "\nkeys(\%\$userldapentry) = " . join(', ', keys %$userldapentry), "\n", $userldapentry->dump();
212 foreach (keys %$userldapentry) {
213 print STDERR "\n\nLDAP key: $_\t", sprintf('(%s)', ref $userldapentry->{$_}), "\n";
214 hashdump("LDAP key: ",$userldapentry->{$_});
217 my $x = $userldapentry->{attrs} or return undef;
219 $memberhash{$_} = join ' ', @{$x->{$_}};
220 $debug and print STDERR sprintf("building \$memberhash{%s} = ", $_, join(' ', @{$x->{$_}})), "\n";
222 $debug and print STDERR "Finsihed \%memberhash has ", scalar(keys %memberhash), " keys\n",
223 "Referencing \%mapping with ", scalar(keys %mapping), " keys\n";
224 foreach my $key (keys %mapping) {
225 my $data = $memberhash{ lc($mapping{$key}->{is}) }; # Net::LDAP returns all names in lowercase
226 $debug and printf STDERR "mapping %20s ==> %-20s (%s)\n", $key, $mapping{$key}->{is}, $data;
227 unless (defined $data) {
228 $data = $mapping{$key}->{content} || ''; # default or failsafe ''
230 $borrower{$key} = ($data ne '') ? $data : ' ' ;
232 $borrower{initials} = $memberhash{initials} ||
233 ( substr($borrower{'firstname'},0,1)
234 . substr($borrower{ 'surname' },0,1)
237 # check if categorycode exists, if not, fallback to default from koha-conf.xml
238 my $dbh = C4::Context->dbh;
239 my $sth = $dbh->prepare("SELECT categorycode FROM categories WHERE categorycode = ?");
240 $sth->execute( uc($borrower{'categorycode'}) );
241 unless ( my $row = $sth->fetchrow_hashref ) {
242 my $default = $mapping{'categorycode'}->{content};
243 $debug && warn "Can't find ", $borrower{'categorycode'}, " default to: $default for ", $borrower{userid};
244 $borrower{'categorycode'} = $default
250 sub exists_local($) {
252 my $dbh = C4::Context->dbh;
253 my $select = "SELECT borrowernumber,cardnumber,userid,password FROM borrowers ";
255 my $sth = $dbh->prepare("$select WHERE userid=?"); # was cardnumber=?
257 $debug and printf STDERR "Userid '$arg' exists_local? %s\n", $sth->rows;
258 ($sth->rows == 1) and return $sth->fetchrow;
260 $sth = $dbh->prepare("$select WHERE cardnumber=?");
262 $debug and printf STDERR "Cardnumber '$arg' exists_local? %s\n", $sth->rows;
263 ($sth->rows == 1) and return $sth->fetchrow;
267 sub _do_changepassword {
268 my ($userid, $borrowerid, $digest) = @_;
269 $debug and print STDERR "changing local password for borrowernumber=$borrowerid to '$digest'\n";
270 changepassword($userid, $borrowerid, $digest);
273 my $sth = C4::Context->dbh->prepare("SELECT password,cardnumber FROM borrowers WHERE borrowernumber=? ");
274 $sth->execute($borrowerid);
276 my ($md5password, $cardnum) = $sth->fetchrow;
277 ($digest eq $md5password) and return $cardnum;
278 warn "Password mismatch after update to cardnumber=$cardnum (borrowernumber=$borrowerid)";
281 die "Unexpected error after password update to userid/borrowernumber: $userid / $borrowerid.";
284 sub update_local($$$$) {
285 my $userid = shift or return undef;
286 my $digest = md5_base64(shift) or return undef;
287 my $borrowerid = shift or return undef;
288 my $borrower = shift or return undef;
289 my @keys = keys %$borrower;
290 my $dbh = C4::Context->dbh;
291 my $query = "UPDATE borrowers\nSET " .
292 join(',', map {"$_=?"} @keys) .
293 "\nWHERE borrowernumber=? ";
294 my $sth = $dbh->prepare($query);
296 print STDERR $query, "\n",
297 join "\n", map {"$_ = '" . $borrower->{$_} . "'"} @keys;
298 print STDERR "\nuserid = $userid\n";
301 ((map {$borrower->{$_}} @keys), $borrowerid)
304 # MODIFY PASSWORD/LOGIN
305 _do_changepassword($userid, $borrowerid, $digest);
313 C4::Auth - Authenticates Koha users
317 use C4::Auth_with_ldap;
319 =head1 LDAP Configuration
321 This module is specific to LDAP authentification. It requires Net::LDAP package and one or more
322 working LDAP servers.
324 * Modify ldapserver element in KOHA_CONF
325 * Establish field mapping in <mapping> element.
327 For example, if your user records are stored according to the inetOrgPerson schema, RFC#2798,
328 the username would match the "uid" field, and the password should match the "userpassword" field.
330 Make sure that ALL required fields are populated by your LDAP database (and mapped in KOHA_CONF).
331 What are the required fields? Well, in mysql you can check the database table "borrowers" like this:
333 mysql> show COLUMNS from borrowers;
334 +---------------------+--------------+------+-----+---------+----------------+
335 | Field | Type | Null | Key | Default | Extra |
336 +---------------------+--------------+------+-----+---------+----------------+
337 | borrowernumber | int(11) | NO | PRI | NULL | auto_increment |
338 | cardnumber | varchar(16) | YES | UNI | NULL | |
339 | surname | mediumtext | NO | | NULL | |
340 | firstname | text | YES | | NULL | |
341 | title | mediumtext | YES | | NULL | |
342 | othernames | mediumtext | YES | | NULL | |
343 | initials | text | YES | | NULL | |
344 | streetnumber | varchar(10) | YES | | NULL | |
345 | streettype | varchar(50) | YES | | NULL | |
346 | address | mediumtext | NO | | NULL | |
347 | address2 | text | YES | | NULL | |
348 | city | mediumtext | NO | | NULL | |
349 | state | mediumtext | YES | | NULL | |
350 | zipcode | varchar(25) | YES | | NULL | |
351 | country | text | YES | | NULL | |
352 | email | mediumtext | YES | | NULL | |
353 | phone | text | YES | | NULL | |
354 | mobile | varchar(50) | YES | | NULL | |
355 | fax | mediumtext | YES | | NULL | |
356 | emailpro | text | YES | | NULL | |
357 | phonepro | text | YES | | NULL | |
358 | B_streetnumber | varchar(10) | YES | | NULL | |
359 | B_streettype | varchar(50) | YES | | NULL | |
360 | B_address | varchar(100) | YES | | NULL | |
361 | B_address2 | text | YES | | NULL | |
362 | B_city | mediumtext | YES | | NULL | |
363 | B_state | mediumtext | YES | | NULL | |
364 | B_zipcode | varchar(25) | YES | | NULL | |
365 | B_country | text | YES | | NULL | |
366 | B_email | text | YES | | NULL | |
367 | B_phone | mediumtext | YES | | NULL | |
368 | dateofbirth | date | YES | | NULL | |
369 | branchcode | varchar(10) | NO | MUL | | |
370 | categorycode | varchar(10) | NO | MUL | | |
371 | dateenrolled | date | YES | | NULL | |
372 | dateexpiry | date | YES | | NULL | |
373 | gonenoaddress | tinyint(1) | YES | | NULL | |
374 | lost | tinyint(1) | YES | | NULL | |
375 | debarred | date | YES | | NULL | |
376 | debarredcomment | varchar(255) | YES | | NULL | |
377 | contactname | mediumtext | YES | | NULL | |
378 | contactfirstname | text | YES | | NULL | |
379 | contacttitle | text | YES | | NULL | |
380 | guarantorid | int(11) | YES | MUL | NULL | |
381 | borrowernotes | mediumtext | YES | | NULL | |
382 | relationship | varchar(100) | YES | | NULL | |
383 | ethnicity | varchar(50) | YES | | NULL | |
384 | ethnotes | varchar(255) | YES | | NULL | |
385 | sex | varchar(1) | YES | | NULL | |
386 | password | varchar(30) | YES | | NULL | |
387 | flags | int(11) | YES | | NULL | |
388 | userid | varchar(30) | YES | MUL | NULL | |
389 | opacnote | mediumtext | YES | | NULL | |
390 | contactnote | varchar(255) | YES | | NULL | |
391 | sort1 | varchar(80) | YES | | NULL | |
392 | sort2 | varchar(80) | YES | | NULL | |
393 | altcontactfirstname | varchar(255) | YES | | NULL | |
394 | altcontactsurname | varchar(255) | YES | | NULL | |
395 | altcontactaddress1 | varchar(255) | YES | | NULL | |
396 | altcontactaddress2 | varchar(255) | YES | | NULL | |
397 | altcontactaddress3 | varchar(255) | YES | | NULL | |
398 | altcontactstate | mediumtext | YES | | NULL | |
399 | altcontactzipcode | varchar(50) | YES | | NULL | |
400 | altcontactcountry | text | YES | | NULL | |
401 | altcontactphone | varchar(50) | YES | | NULL | |
402 | smsalertnumber | varchar(50) | YES | | NULL | |
403 | privacy | int(11) | NO | | 1 | |
404 +---------------------+--------------+------+-----+---------+----------------+
405 66 rows in set (0.00 sec)
406 Where Null="NO", the field is required.
408 =head1 KOHA_CONF and field mapping
410 Example XML stanza for LDAP configuration in KOHA_CONF.
414 <useldapserver>1</useldapserver>
415 <!-- LDAP SERVER (optional) -->
416 <ldapserver id="ldapserver">
417 <hostname>localhost</hostname>
418 <base>dc=metavore,dc=com</base>
419 <user>cn=Manager,dc=metavore,dc=com</user> <!-- DN, if not anonymous -->
420 <pass>metavore</pass> <!-- password, if not anonymous -->
421 <replicate>1</replicate> <!-- add new users from LDAP to Koha database -->
422 <update>1</update> <!-- update existing users in Koha database -->
423 <auth_by_bind>0</auth_by_bind> <!-- set to 1 to authenticate by binding instead of
424 password comparison, e.g., to use Active Directory -->
425 <principal_name>%s@my_domain.com</principal_name>
426 <!-- optional, for auth_by_bind: a printf format to make userPrincipalName from koha userid -->
427 <mapping> <!-- match koha SQL field names to your LDAP record field names -->
428 <firstname is="givenname" ></firstname>
429 <surname is="sn" ></surname>
430 <address is="postaladdress" ></address>
431 <city is="l" >Athens, OH</city>
432 <zipcode is="postalcode" ></zipcode>
433 <branchcode is="branch" >MAIN</branchcode>
434 <userid is="uid" ></userid>
435 <password is="userpassword" ></password>
436 <email is="mail" ></email>
437 <categorycode is="employeetype" >PT</categorycode>
438 <phone is="telephonenumber"></phone>
443 The <mapping> subelements establish the relationship between mysql fields and LDAP attributes. The element name
444 is the column in mysql, with the "is" characteristic set to the LDAP attribute name. Optionally, any content
445 between the element tags is taken as the default value. In this example, the default categorycode is "PT" (for
450 Once a user has been accepted by the LDAP server, there are several possibilities for how Koha will behave, depending on
451 your configuration and the presence of a matching Koha user in your local DB:
454 OPTION UPDATE REPLICATE EXISTS? RESULT
455 A1 1 1 1 OK : We're updating them anyway.
456 A2 1 1 0 OK : We're adding them anyway.
457 B1 1 0 1 OK : We update them.
458 B2 1 0 0 FAIL: We cannot add new user.
459 C1 0 1 1 OK : We do nothing. (maybe should update password?)
460 C2 0 1 0 OK : We add the new user.
461 D1 0 0 1 OK : We do nothing. (maybe should update password?)
462 D2 0 0 0 FAIL: We cannot add new user.
464 Note: failure here just means that Koha will fallback to checking the local DB. That is, a given user could login with
465 their LDAP password OR their local one. If this is a problem, then you should enable update and supply a mapping for
466 password. Then the local value will be updated at successful LDAP login and the passwords will be synced.
468 If you choose NOT to update local users, the borrowers table will not be affected at all.
469 Note that this means that patron passwords may appear to change if LDAP is ever disabled, because
470 the local table never contained the LDAP values.
474 Binds as the user instead of retrieving their record. Recommended if update disabled.
476 =head2 principal_name
478 Provides an optional sprintf-style format for manipulating the userid before the bind.
479 Even though the userPrincipalName is one intended target, any uniquely identifying
480 attribute that the server allows to be used for binding could be used.
482 Currently, principal_name only operates when auth_by_bind is enabled.
484 =head2 Active Directory
486 The auth_by_bind and principal_name settings are recommended for Active Directory.
488 Under default Active Directory rules, we cannot determine the distinguishedName attribute from the Koha userid as reliably as
489 we would typically under openldap. Instead of:
491 distinguishedName: CN=barnes.7,DC=my_company,DC=com
495 distinguishedName: CN=Barnes\, Jim,OU=Test Accounts,OU=User Accounts,DC=my_company,DC=com
497 Matching that would require us to know more info about the account (firstname, surname) and to include punctuation and whitespace
498 in Koha userids. But the userPrincipalName should be consistent, something like:
500 userPrincipalName: barnes.7@my_company.com
502 Therefore it is often easier to bind to Active Directory with userPrincipalName, effectively the
503 canonical email address for that user, or what it would be if email were enabled for them. If Koha userid values
504 will match the username portion of the userPrincipalName, and the domain suffix is the same for all users, then use principal_name
506 <principal_name>%s@core.my_company.com</principal_name>
508 The user of the previous example, barnes.7, would then attempt to bind as:
509 barnes.7@core.my_company.com
525 # For reference, here's an important difference in the data structure we rely on.
526 # ========================================
527 # Using attrs instead of {asn}->attributes
528 # ========================================
530 # LDAP key: ->{ cn} = ARRAY w/ 3 members.
531 # LDAP key: ->{ cn}->{ sss} = sss
532 # LDAP key: ->{ cn}->{ Steve Smith} = Steve Smith
533 # LDAP key: ->{ cn}->{Steve S. Smith} = Steve S. Smith
535 # LDAP key: ->{ givenname} = ARRAY w/ 1 members.
536 # LDAP key: ->{ givenname}->{Steve} = Steve