LDAP connector doesn't read parameter - ldap

Question

I have an issue during the execution time and I believe that the connector maybe has a problem with its parameters for ldap.init. During the execution of this component an error is gotten by the fault flow:
[2016-04-22 18:08:24,089] INFO - LogMediator To: /SampleContextLdapContext, MessageID: urn:uuid:bd9a9e05-84eb-48d9-8cef-6eff06b6f64d, Direction: request, DEUPAU = An error has been gotten, messageFaultError = Error occured in the mediation of the class mediator, messageFaultCode = 0, messageFaultException = , messageFaultDetail = org.apache.synapse.SynapseException: Error occured in the mediation of the class mediator
at org.apache.synapse.mediators.ext.ClassMediator.mediate(ClassMediator.java:82)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:81)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:48)
at org.apache.synapse.mediators.template.TemplateMediator.mediate(TemplateMediator.java:97)
at org.apache.synapse.mediators.template.InvokeMediator.mediate(InvokeMediator.java:129)
at org.apache.synapse.mediators.template.InvokeMediator.mediate(InvokeMediator.java:78)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:81)
at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:48)
at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:149)
at org.apache.synapse.rest.Resource.process(Resource.java:297)
at org.apache.synapse.rest.API.process(API.java:378)
at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:97)
at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:65)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:266)
at org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:83)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ServerWorker.processNonEntityEnclosingRESTHandler(ServerWorker.java:317)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:363)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:142)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at java.util.Hashtable.put(Unknown Source)
at org.wso2.carbon.connector.ldap.Authenticate.connect(Authenticate.java:55)
at org.wso2.carbon.connector.core.AbstractConnector.mediate(AbstractConnector.java:32)
at org.apache.synapse.mediators.ext.ClassMediator.mediate(ClassMediator.java:78)
... 22 more
It seems that I missed some parameter as the error occurs in Authenticate.java. Look at line 55 in the GitHub and now on a part of my XML:
<api context="/SampleContextLdapContext" name="SampleLdapName" xmlns="http://ws.apache.org/ns/synapse">
<resource methods="POST" protocol="http">
<inSequence>
<log description="" separator=",">
<property name="Message Flow" value="LDAP SAMPLE TEST"/>
<property expression="//myvar/text()" name="myVarValue"/>
</log>
<ldap.init>
<providerUrl>ldap://192.168.2.10:389/</providerUrl>
<securityPrincipal>aqlbras\willian</securityPrincipal>
<securityCredentials>SamplePassword</securityCredentials>
</ldap.init>
When I don't configure providerUrl the error occurs at line 54, it means that the name parameter is correct for this tag but it's incorrect for securityPrincipal tag (you can see in GitHub repository to make sure).
Have I missed something or there is a mistake in the code?
Requirement details
Create a rest web service which receives an username and password.
Use the parameters to authenticate in a LDAP directory and return some of his own attributes/properties.

Answer 1

I think the problem is that your securityPrincipal is not an LDAP distinguished name (DN). For example, it would look something like uid=willian,ou=people,dc=aqlbras,dc=com
I am not surprised that you get a NullPointerException if you do not set the providerUrl. This is basically the hostname/port information to your LDAP server.