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Date: Tue, 7 Oct 2008 15:04:44 -0700 (PDT)
From: "Emmanuel Lecharny (JIRA)" <jira@apache.org>
To: dev@directory.apache.org
Subject: [jira] Resolved: (DIRSERVER-1275) Possible bug when searching with
 an empty filter
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     [ https://issues.apache.org/jira/browse/DIRSERVER-1275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Emmanuel Lecharny resolved DIRSERVER-1275.
------------------------------------------

    Resolution: Invalid

This is a problem with Python Ldap implementation which does not generate a correct PDU. The server correctly reject the request because there is no filter in it, when it's a mandatory field.

> Possible bug when searching with an empty filter
> ------------------------------------------------
>
>                 Key: DIRSERVER-1275
>                 URL: https://issues.apache.org/jira/browse/DIRSERVER-1275
>             Project: Directory ApacheDS
>          Issue Type: Bug
>          Components: asn1
>    Affects Versions: 1.5.4
>            Reporter: Rui Lopes
>
> I'm not sure if this is a bug, but still, I'm going to report it as such.
> When I try to do a search using python-ldap:
> import ldap
> l = ldap.initialize('ldap://localhost:10389')
> l.simple_bind_s('uid=admin,ou=system', 'secret')
> l.search_s('', ldap.SCOPE_BASE, "", ('vendorName', 'vendorVersion'))
> NB: the empty string "" is normally "(objectClass=*)", but for this bug to happen, pass an empty string, or even "()".
> This is was I get in the AD logs:
> [21:21:42] ERROR [org.apache.directory.shared.asn1.ber.grammar.AbstractGrammar] - Bad transition from state TYPES_ONLY_STATE, tag 0x30
> [21:21:42] WARN [org.apache.directory.server.ldap.LdapProtocolHandler] - [/127.0.0.1:39441] Unexpected exception forcing session to close: sending disconnect notice to client.
> org.apache.mina.filter.codec.ProtocolDecoderException: org.apache.directory.shared.ldap.message.ResponseCarryingMessageException: Bad transition ! (Hexdump: 30 33 02 01 0B 63 2E 04 00 0A 01 00 0A 01 00 02 01 00 02 01 00 01 01 00 30 1B 04 0A 76 65 6E 64 6F 72 4E 61 6D 65 04 0D 76 65 6E 64 6F 72 56 65 72 73 69 6F 6E 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00)
>         at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:165)
>         at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299)
>         at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:53)
>         at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:648)
>         at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:220)
>         at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:264)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>         at java.lang.Thread.run(Thread.java:636)
> Caused by: org.apache.directory.shared.ldap.message.ResponseCarryingMessageException: Bad transition !
>         at org.apache.directory.shared.ldap.message.MessageDecoder.decode(MessageDecoder.java:165)
>         at org.apache.directory.shared.asn1.codec.Asn1CodecDecoder.decode(Asn1CodecDecoder.java:53)
>         at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:158)
>         ... 8 more
> [21:21:42] WARN [org.apache.directory.server.ldap.LdapProtocolHandler] - Null LdapSession given to cleanUpSession.

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