openldap-technical August 2014

openldap-technical@openldap.org

62 participants
58 discussions

Virtual list view problem
by Venish Khant 31 May '16

31 May '16

Hi all I am using cpan Net::LDAP module to access LDAP entries. I want to search LDAP entries using Net::LDAP search method. When I do search, I want some limited number of entries from search result, for this(searching) process I am using Net::LDAP::Control::VLV module. But I get error on VLV response control. Please, any one have idea about this error. * Error:* Died at vlv.pl line 50, This is my example. I changed the font style of line 50 #!/usr/bin/perl -w use Net::LDAP; use Net::LDAP::Control::VLV; use Net::LDAP::Constant qw( LDAP_CONTROL_VLVRESPONSE ); use Net::LDAP::Control::Sort; sub procentry { my ( $mesg, $entry) = @_; # Return if there is no entry to process if ( !defined($entry) ) { return; } print "dn: " . $entry->dn() . "\n"; @attrs = $entry->attributes(); foreach $attr (@attrs) { #printf("\t%s: %s\n", $attr, $entry->get_value($attr)); $attrvalue = $entry->get_value($attr,asref=>1); #print $attr.":". $entry->get_value($attr)."\n"; foreach $value(@$attrvalue) { print "$attr: $value\n"; } } $mesg->pop_entry; print "\n"; } $ldap = Net::LDAP->new( "localhost" ); # Get the first 20 entries $vlv = Net::LDAP::Control::VLV->new( before => 0, # No entries from before target entry after => 19, # 19 entries after target entry content => 0, # List size unknown offset => 1, # Target entry is the first ); my $sort = Net::LDAP::Control::Sort->new( order => 'cn' ); @args = ( base => "dc=example,dc=co,dc=in", scope => "subtree", filter => "(objectClass=inetOrgPerson)", callback => \&procentry, # Call this sub for each entry control => [ $sort, $vlv ], ); $mesg = $ldap->search( @args ); # Get VLV response control *($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die;* $vlv->response( $resp ); # Set the control to get the last 20 entries $vlv->end; $mesg = $ldap->search( @args ); # Get VLV response control ($resp) = $mesg->control( LDAP_CONTROL_VLVRESPONSE ) or die; $vlv->response( $resp ); # Now get the previous page $vlv->scroll_page( -1 ); $mesg = $ldap->search( @args ); # Get VLV response control ($resp) = $mes # Now page with first entry starting with "B" in the middle $vlv->before(9); # Change page to show 9 before $vlv->after(10); # Change page to show 10 after $vlv->assert("B"); # assert "B" $mesg = $ldap->search( @args );g->control( LDAP_CONTROL_VLVRESPONSE ) or die; $vlv->response( $resp ); -- Venish Khant www.deeproot.co.in

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OpenLDAP and dynalogin (two-factor auth with HOTP)
by Daniel Pocock 29 Jun '15

29 Jun '15

Some time ago I created the dynalogin ( http://www.dynalogin.org ) solution for two-factor authentication. I'm just contemplating how to make it easier to integrate, and making it convenient to use with OpenLDAP seems like a good strategy: can anyone comment on that? The initial thoughts that I have about the subject: - SASL based solution (dynalogin has digest capability already, so it could be adapted for SASL PLAIN or DIGEST-MD5) - should not prevent password logins (user should be able to use either password or HOTP code) - should enable people to use it indirectly (e.g. if someone already has pam_ldap working, they should be able to add dynalogin to their OpenLDAP server and get immediate benefit) - use cases: UNIX login, high-security webmail login, VPN and OpenID provider backed by OpenLDAP I know that SASL already supports OTP, but that is not HOTP, it is OPIE (or S/Key) RFC 2289: http://tools.ietf.org/html/rfc2289 whereas HOTP is RFC 4226: http://www.ietf.org/rfc/rfc4226.txt HOTP is considered more secure and more widely implemented.

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translucent overlay add an attribute to all users in a OU and subtree
by Nicolas RENAULT 26 Oct '14

26 Oct '14

Hi, (sorry for poor english) I already ask here for meta and it's working (only have the date format conversion problem but we are about to find alternative) So the ldap proxy can search for a user and provide attributes from an AD, Edir and openldap. but now I want to add attributes to the edir and openldap users search result to have as much as from a AD user (example homeDrive) I plan to use translucent to add these attributes, find that translucent cannot be used with meta so create new slapd instance. I have add base and OU into this instance I read carefully http://www.openldap.org/doc/admin24/overlays.html , and man slapo-translucent I understand that they explain how to add attributes to only one group here my questions how can I add attributes to the translucent instance to all users in an OU (and sub) ? is there another way to do what I want to do ? thanks all for responses -- Nicolas

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Problem: LDAP installation without internet
by Patrick Pat 23 Sep '14

23 Sep '14

Hi, I would like all LDAP installation procedure without internet in linux (ubuntu (9.10 or other), Debian, ...), but by its compressed file namely: openldap-2.4.8.tgz or openldap-2.4.7.tgz or openldap-2.4.9.tgz or openldap-2.0-beta.tgz ... And any configuration environment variables. best regards !

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RE24 testing call (2.4.40)
by Quanah Gibson-Mount 10 Sep '14

10 Sep '14

If you know how to build OpenLDAP manually, and would like to participate in testing the next set of code for the 2.4.39 release, please do so. Generally, get the code for RE24: <http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=snapshot;h=refs/h…> Configure & build. Execute the test suite (via make test) after it is built. Thanks! --Quanah -- Quanah Gibson-Mount Server Architect Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration

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LDAP gateway to RADIUS serverf
by David R 08 Sep '14

08 Sep '14

Dear All, I have setup 2 factor authentication on a RADIUS server (OTP).The user has to authenticate using:login: adusernamepassword: ADpasswordGENERATEDPIN My issue is that some applications like VMWare supports only LDAP authentication. So i was wondering how i could use RADIUS server for authentication inside LDAP. I have found some elements like pw-radius.so, but this is clearly not fully documented. So I was wondering if one of you has ever implemented this kind of solution and how... Kind reagrds, David

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LMDB write/read simultaneously over different threads
by Vasilis Lasdas 29 Aug '14

29 Aug '14

Hi all, I am a new user to LMDB. Please forgive me for my ignorance or mistakes you might encounter. However, I have spent quite some time trying to resolve my issues but without a success. That's why I am writing to you asking for your help to shade some light. To the point: 1) I am having a database where there is only one writer and a few readers(e.g. 4 readers). 2) The database-writer lives on different thread than the database-reader(s). 3) The writer-thread keeps on running/writing all the time to the database. 4) At random intervals readers from different threads will request to extract data from the database. The problem that occurs is the following: If the writer is active( during writing), If I try to fetch any data from the db using the reader, it fails, with error MDB_NOTFOUND. As a remark here, I make sure that the reader-thread is launched AFTER the writer thread to ensure that the data exist in the db. In order to simulate this kind of behaviour(write-read) over different threads, I have written a small test application, that tries to depict my case/usecase. In main() I simply launch two threads/functions, the writer-thread and after some time, the reader thread. The common enviroment is constructed() in main and passed as parameter to the auxilliary functions. If the reader starts reading while writing is not finished, then the application crashes or returns MDB_NOTFOUND. This contradicts with the capabilities of the library, that is, parallel write/read from different threads. If the writer has finished, then the reader works properly. Some general questions. i) How many times do i need to open the database? Currently I open the (unique) database twice: one in the writer and one in the reader. The doc mentions that it has to be opened only one time. Even in that case, my app does not work. ii) What is the practical usage of mdb_txn_reset() and mdb_txn_renew()? Does it need to be used in my case? iii) Since I am only ADDING data in the db and only READING them, what kind of optimizations can be applied? iv) Regarding for-loops, what is a proper way of using the trasnactions and commit/abort/reset/etc of transactions? Please any helpfull information is highly apprecited or if someone can add some examples with different threads that would be awesome. #include <iostream> #include <thread> #include <assert.h> #include <string> #include "lmdb.h" #include <unistd.h> using namespace std; void writeLMDB( MDB_env * env, size_t nrElems ) { cout << "BEGIN WRITING." << endl; MDB_txn *txn; MDB_dbi dbi; MDB_stat status; // create transaction assert( MDB_SUCCESS == mdb_txn_begin( env, NULL, 0, &txn ) ); // open db assert( MDB_SUCCESS == mdb_open( txn, NULL, MDB_DUPSORT , &dbi ) ); // this commit-transaction is needed since we are creating the db for the first time assert( MDB_SUCCESS == mdb_txn_commit( txn ) ); MDB_val key, data; // begin (again a new transaction) assert( MDB_SUCCESS == mdb_txn_begin( env, NULL, 0, &txn ) ); // keep on writing elements in the db for( size_t i = 0; i < nrElems ; ++i ) { key.mv_size = sizeof( size_t ); key.mv_data = &i; string value = "test"; data.mv_size = value.size(); data.mv_data = (void*)value.data(); cout << "WRITER-KEY:" << *(size_t*)key.mv_data << " VALUE:" ; cout.write( (char*)data.mv_data, data.mv_size ); cout << endl; assert( MDB_SUCCESS == mdb_put( txn, dbi, &key, &data, 0 ) ); } assert( MDB_SUCCESS == mdb_txn_commit( txn ) ); assert( MDB_SUCCESS == mdb_env_stat( env, &status ) ); mdb_close( env, dbi ); cout << "FINISHED WRITING." << endl; } void readLMDB( MDB_env * _env, size_t start, size_t end ) { cout << "BEGIN READING.." << endl; MDB_dbi dbi; MDB_txn *txn = NULL; // lmdb operations assert( MDB_SUCCESS == mdb_txn_begin( _env, NULL, MDB_RDONLY, &txn ) ); assert( MDB_SUCCESS == mdb_open( txn, NULL, 0, &dbi ) ); // key+data MDB_val key, data; for ( size_t i = start; i <= end ; i++ ) { key.mv_size = sizeof( size_t ); key.mv_data = &i; int res = mdb_get( txn, dbi , &key, &data ); //cout << "READER-KEY:" << *(size_t*)key.mv_data << " VALUE:" ; cout.write( (char*)data.mv_data, data.mv_size ); cout << endl; if( res != 0 ) cout << "error fetching data" << endl; } // close db mdb_close( _env, dbi ); cout << "FINISHED READING.." << endl; } int main(int argc, char *argv[] ) { // db location(folder must exist) string dbLocation = "/work/vasilis/databases/lmdbtest/"; size_t maxdbSize = 10485760; system( "rm -rf /work/vasilis/databases/lmdbtest/*" ); //create enviroment:ONE enviroment only for one process MDB_env * _env; assert( MDB_SUCCESS == ( mdb_env_create( &_env ) ) ); //set the size of the database assert( MDB_SUCCESS == mdb_env_set_mapsize( _env, maxdbSize ) ); // open the enviroment: ready to be used by everyone else assert( MDB_SUCCESS == mdb_env_open( _env, dbLocation.c_str(), 0 , 0664 ) ); // writer-thread: write 1000 elements in the database thread writethread( writeLMDB, _env, 1000 ); usleep( 1000 * 100 ); // read from - to thread readthread( readLMDB, _env, 0, 20 ); // wait for threads to finish writethread.join(); readthread.join(); cout << "THREADS COMPLETED " << endl; // close the enviroment mdb_env_close( _env ); return 0; } regards, Vasilis

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Passwords, Hashing, and Binds
by Bram Cymet 29 Aug '14

29 Aug '14

Hi, I am storing users passwords in a userPassword attribute. When the passwords are hashed with MD5 I can bind as the user just fine. If I hash the password with sha-256 I get invalid credentials. Is there something I have to change in my client? Is there something I have to change on the server? Is binding a user with a password stored with sha-256 (or at least something better then md5) even possible? Thanks, -- Bram Cymet Software Developer Canadian Bank Note Co. Ltd. 613-608-9752

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keepalive parameter setting in openldap for consumer doesnot work
by pramod kulkarni 28 Aug '14

28 Aug '14

Hi, I unplugged network cable of provider,added new users but it never synchronizes. with the consumer.Consumer never sends the keepalive signals I am using 2.4.39 version of Openldap on windows machine this is my consumer setting olcSyncrepl: {0}rid=002 provider=ldap://ipaddress:389 bindmethod=sasl timeou t=0 network-timeout=0 saslmech=external keepalive=1:1:10 starttls=critical tl s_cert="CN=Consumer3, O=CRAP" tls_cacert="CN=TestCA, O=CRAP" tls_reqcert=demand tls_cipher_suite=HIGH:MEDIUM:-SSLv2 filter="(objectclass=*)" searchbase="dc= crap,dc=com" scope=sub attrs="*,+" schemachecking=off type=refreshAndPersis t retry="60 +" if I make fresh setup of consumer & provider,it works & everything gets replicated properly. In the earlier version of openldap it was based on system setting like I used to get keepalive every 2 hours. What is the minimum value to be set for keepalive parameter in syncrepl? Can you please tell me do I need to make any changes on consumer side or provider ?

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3rd try : Bug ? ldap_start_tls_s successful even after removing ca certificate from ca cert dir
by SOMA SEKHAR 28 Aug '14

28 Aug '14

On Sat, Aug 23, 2014 at 1:08 PM, SOMA SEKHAR <somasekhar44(a)gmail.com> wrote: > link to question on stackoverflow > <http://stackoverflow.com/questions/25457034/starttls-succesful-even-after-d…> > > > I'm having trouble verifying the correct behavior of my software. Here are > the steps I am performing to verify correct operation: > > 1. I have sample code that uses openldap library and doing a start tls > to a ldap server. > 2. I have set the global option for ca cert directory and tlx context > for the first time. > 3. After that I did ldap init and ldap start tls to a server. This is > succesful as expected. > 4. I did an ldap_unbind_s > 5. I deleted the CA cert that signed the ldap server's certificate > from the ca cert directory of the client. > 6. Again did ldap_init and ldap_start_tls_s . > 7. I expected this call to fail , as I have removed the ca cert. But > what I observe is that , server sends the certificate but start_tls is > returning success. > > I am using openldap 2.4 with libssl.0.9.8 > > LDAP *ld;int desired_version=3; > if ((ld = ldap_init(<hostname>, <server_port>)) == NULL ) { > printf("ldap_init failed\n"); > exit(0);} > > ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &desired_version); > ldap_set_option(NULL, LDAP_OPT_X_TLS_CTX, NULL); > ldap_set_option(NULL, LDAP_OPT_X_TLS_CACERTDIR,"<ca dir>"); > if(ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS){ > printf("start tls failed.\n"); > exit(0);} > ...... <do bind and search>... > > ldap_unbind_s(ld); ... > // DELETE the CA certificate from the ca dir. // Try to do start tls again > if ((ld = ldap_init(hostname, server_port)) == NULL ) { > printf("ldap_init failed , after deleting CA\n"); > exit(0);} > // This goes fine even after deleting the CAif (ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS){ > printf("start tls failed after deleting CA.\n"); > exit(0);} > > > -- > Thanks&Regards, > SomaSekhar. > > -- Thanks&Regards, SomaSekhar.

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openldap-technical August 2014