Ibm mq 2035 error

2035 MQRC_NOT_AUTHORIZED Connecting to WebSphere MQ from WebSphere Application Server via CLIENT Bindings

Troubleshooting

Problem

Symptom

Cause

Diagnosing The Problem

Please note that WebSphere MQ V7.5 and earlier does not provide any out-of-the box password authentication system for client connections.
Password authentication is provided out of the box in IBM MQ V8.0. More details on the new IBM MQ V8.0 security features are available in this presentation.

For WebSphere MQ V7.5 and earlier, this means that while the understanding provided in this technote over how usernames and passwords are passed from the application server to MQ is helpful for development environments, solving the security requirements of production environments usually also requires one of the following approaches:

• Mutual SSL/TLS authentication.
  MQ provides out-of-the-box features toauthenticate a remotely attaching client using the digital certificate they provide for SSL/TLS transport security. For example by configuring an SSLPEER rule on the SVRCONN channel to match the Distinguished Name in the certificate of the WebSphere Application Server, and establishing trust in the issuer of that certificate.
• A custom, or 3rd party supplied, WebSphere MQ Security Exit
  A security exit can be written for MQ that performs username and password authentication against a repository, such as the local operating system on the MQ server, or an LDAP repository.
  When using a security exit for authentication it is important that SSL/TLS transport security is still configured, to ensure passwords are not sent in plain text.

MCA user ID (MCAUSER) configured on the Server Connection (SVRCONN) channel

If an MCAUSER is configured on the SVRCONN channel that the application server is using to connect, and no security exit or mapping Channel Authentication Record is installed, then this overrides the username provided by the application server.

It is common practice for many customers to set an MCAUSER on every SVRCONN channel, and use mutual SSL/TLS authentication exclusively for authentication.

Default behavior when no credentials are supplied in the application server

If no credentials are supplied by the application on the createConnection call, and neither of the component managed or container-managed security systems described below are configured, then WebSphere Application Server provides a blank username to MQ. This causes MQ to authorize the client based on the user id that the listener is running under. In the majority of cases this is ‘mqm’ on UNIX/Linux systems and ‘MUSR_MQADMIN’ on Windows.

As these are administrative users, they will be blocked by default in WebSphere MQ V7.1 and higher, with an AMQ9777 error logged in the error logs of the queue manager.

Container-managed security for outbound connections

The recommended way to configure the username and password passed to MQ by the application server for outbound connections, is to use container-managed security. Outbound connections are those created using a Connection Factory, rather than a Listener Port or Activation Specification.

Usernames of 12 characters or less are passed to MQ by the application server. Usernames longer than 12 characters in length will be truncated, either during authorization (on UNIX), or in the MQMD of messages that are sent.

Container-managed security means that the deployment descriptor, or EJB 3.0 annotations, of the application declare a resource reference with authentication type set to Container.

Then when the application looks up the Connection Factory in JNDI, it does so indirectly via the resource reference. For example an EJB 2.1 application would perform a JNDI lookup as follows, where «jms/MyResourceRef» has been declared as a resource reference in the deployment descriptor:

ConnectionFactory myCF = (ConnectionFactory)ctx.lookup(«java:comp/env/ jms/MyResourceRef»)

An EJB 3.0 application might declare an annotated object property on the bean as follows:

When the application is deployed by an administrator, they bind this authentication alias to an actual Connection Factory that has been created in JNDI, and assign it a J2C authentication alias on deployment.

It is the username and password contained in this authentication alias that is then passed to MQ/JMS by the application server when the application connects. This approach puts the administrator in control of which username and password is used by each application, and prevents a different application from looking up the connection factory in JNDI directly to connect with the same username and password.

A default container-managed authentication alias can be supplied on the configuration panels in the administrative console for MQ connection factories. This default will only be used in the case that an application uses a resource reference configured for container-managed security, but the administrator has not bound it to an authentication alias during deployment. A screen shot is provided below:

Default component-managed authentication alias for outbound connections

For cases where it is impractical to change the application to use container-managed security, or to change it to supply a username and password directly on the createConnection call, it is possible to supply a default.

This default is called the «component-managed authentication alias» and cannot be configured via the administrative console (since WebSphere Application Server Version 7.0 when it was removed from the panels connection factories). The below scripting samples show how to configure it using wsadmin:

JACL:
wsadmin>set cell [ $AdminConfig getid «/Cell:mycell» ]

wsadmin>$AdminTask listWMQConnectionFactories $cell

wsadmin>$AdminTask modifyWMQConnectionFactory MyCF(cells/mycell|resources.xml#MQConnectionFactory_1247500675104)

Problem: If we create a new queue manager in WebSphere MQ 7.1, 7.5, 8.0 or 9.0 or later and try to use a user id(commonly mqm for UNIX and MUSR_MQADMIN on Windows) that is an MQ Administrator to access the queue manager via a server-connection channel (remotely from another host, or locally from the same host and not using bindings mode). You get an error with reason code 2035:

2035 MQRC_NOT_AUTHORIZED

Related error codes:
MQ Explorer => AMQ4036 
MQ classes for JMS => JMSWMQ2013

1a. We can add the following two Channel Authentication Records:

The first rule blocks administrative users and the MCAUSER «nobody» (which prevents someone from creating a user ID «nobody» and putting it into an authorized group).
$ runmqsc QmgrName
SET CHLAUTH(*) TYPE(BLOCKUSER) USERLIST(‘nobody’,’*MQADMIN’)

The second rule provides a reduced blacklist for SYSTEM.ADMIN channels that allows administrators to use these. It is assumed here that some other CHLAUTH rule such as an SSLPEERMAP has validated the administrator’s connection or that an exit has done so.

SET CHLAUTH(SYSTEM.ADMIN.*) TYPE(BLOCKUSER) USERLIST(‘nobody’)

The above rules apply to SYSTEM.ADMIN.SVRCONN which is used by the MQ Explorer. 

If you are using another user-defined channel, such as MY.ADMIN.SVRCONN, then you need to add the following two records:
SET CHLAUTH(MY.ADMIN.SVRCONN) TYPE(ADDRESSMAP) ADDRESS(*) USERSRC(CHANNEL)
SET CHLAUTH(MY.ADMIN.SVRCONN) TYPE(BLOCKUSER) USERLIST(‘nobody’)

Note: it is not advisable to use SYSTEM.DEF.* channels for active connections. The system default channels are the objects from which all user-defined channels inherit properties. The recommended practice is that SYSTEM.DEF.* and SYSTEM.AUTO.* channels should NOT be configured to be usable.

1b. This is a variation of (1a) but allowing the MQ Administrator to only use a particular host.

The first rule blocks MCAUSER «nobody».
SET CHLAUTH(SYSTEM.ADMIN.SVRCONN) TYPE(BLOCKUSER) USERLIST(‘nobody’)

The second rule removes all access to SYSTEM.ADMIN.SVRCONN …
SET CHLAUTH(SYSTEM.ADMIN.SVRCONN) TYPE(ADDRESSMAP) ADDRESS(*) ACTION(REMOVE)

And the third rule adds an entry for the server that needs access.
SET CHLAUTH(SYSTEM.ADMIN.SVRCONN) TYPE(ADDRESSMAP) ADDRESS(9.xx.xx.8y) USERSRC(CHANNEL)

1c. Disable the Channel Authentication Records feature:

$ runmqsc QmgrName
DISPLAY QMGR CHLAUTH
AMQ8408: Display Queue Manager details.
QMNAME(TEST01) CHLAUTH(ENABLED)

ALTER QMGR CHLAUTH(DISABLED)

WARNING: Disabling this new feature is not recommended for MQ 7.1 production queue managers due to security implications.
Note that disabling CHLAUTH results in a policy that accepts administrative connections by default. The administrative effort to lock down administrative access with CHLAUTH(DISABLED) is much greater than to do so with CHLAUTH(ENABLED). It is therefore recommended to leave CHLAUTH(ENABLED) and use the other security features of WebSphere MQ V7.1 to authenticate administrator connections.

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IBM MQ reason code 2087 (AMQ4048)com.ibm.msg.client.jms.DetailedIllegalStateException: JMSWMQ2007

IBM MQ — Resolve «MQCC_FAILED MQRC_NOT_AUTHORIZED»

The following error occurs when a request is submitted to IBM MQ, such as a request to connect to an IBM MQ channel, or to GET or PUT messages on an IBM MQ queue. 

IBM MQ call failed with compcode '2' ('MQCC_FAILED') reason '2035' ('MQRC_NOT_AUTHORIZED').

Following are the most probable reasons this exception is being returned:

• An invalid username and/or password is being used in the connection request
• The user has not been granted permission to the object (queue manager, topic, queue, et cetera)
• The channel is blocked
• MQConstants.USE_MQCSP_AUTHENTICATION_PROPERTY is set to false or JmsConstants.USER_AUTHENTICATION_MQCSP is set to false or system property com.ibm.mq.cfg.jmqi.useMQCSPauthentication is set to false

Get the principal (username)

Often, you will know the username being used to connect to IBM MQ. However, if you only know the channel or queue or topic, the dmpmqaut command can be used to potentially find the username. In this scenario, the username will be known as the principal.

dmpmqaut -m MANAGER01 > dump.txt 2>&1

Something like this should be in dump.txt.

profile:     QUEUE001
object type: queue
entity:      john.doe
entity type: principal
authority:   get browse put inq

Queue Manager

If you are able to determine the username that should have been granted permission to the object, use the dspmqaut command to determine if the user has the inq and connect permission to the queue manager.

dspmqaut -m MANAGER01 -t qmgr -p JohnDoe

Entity JohnDoe has the following authorizations for object MANAGER01: 
    connect
    inq

Channel

Let’s say your IBM MQ — Error Logs contains AMQ9777E Channel was blocked. In this example, the channel named CHANNEL01 was blocked. This means that a connection could not be made to the channel.

mm/dd/yyyy hh:mm:ss - Process(18271.9654) User(mqm) Program(amqrmppa)
                    Host(mq.example.com) Installation(Installation1)
                    VRMF(9.1.0.3) QMgr(MANAGER01)
                    Time(yyyy-mm-ddThh:mm:ss.sss)
                    RemoteHost(10.1.2.3)
                    CommentInsert1(CHANNEL01)
                    CommentInsert2(SERVER01 (10.4.5.6))
                    CommentInsert3(CLNTUSER(john.doe) ADDRESS(client.example.com))

AMQ9777E: Channel was blocked

EXPLANATION:
The inbound channel 'CHANNEL01' was blocked from address 'client.example.com
(10.4.5.6)' because the active values of the channel matched a record
configured with USERSRC(NOACCESS). The active values of the channel were
'CLNTUSER(john.doe) ADDRESS(client.example.com)'.

The display chlauth (channel authority) command can be used. Notice in this example that the channel is configured to allow connections from «client01.example.com». If the connection is NOT being made from the system with hostname client01.example.com, the connection will be refused and the IBM MQ log should have «AMQ9777E Channel was blocked».

The set chlauth command can be used to add authority to the channel.

~]# echo "display chlauth (CHANNEL01)" | runmqsc MANAGER01
CHLAUTH(CHANNEL01)                      TYPE(ADDRESSMAP)
DESCR(Allow access and use ID from channel)
CUSTOM( )                               ADDRESS(client01.example.com)
USERSRC(CHANNEL)                        CHCKCLNT(ASQMGR)
ALTDATE(2019-08-20)                     ALTTIME(07.09.01)

Queue or Topic

Use the dspmqaut command to determine if the user has the pub and sub permission to the Topic . . .

dspmqaut -m MANAGER01 -n TOPIC01 -t topic -p JohnDoe

Entity JohnDoe has the following authorizations for object TOPIC01: 
    pub
    sub

. . . or the inq, browse, put and get permissions to the queue.

dspmqaut -m MANAGER01 -n QUEUE01 -t queue -p JohnDoe

Entity JohnDoe has the following authorizations for object QUEUE01: 
    inq
    browse
    get
    put

Note that some Java applications will include the name of the Queue Manager, Queue or Topic, username and password being used in the request.

private static final String QMGR     = "MANAGER01";
private static final String QUEUE    = "QUEUE01";
private static final String USER     = "JohnDoe";
private static final String PASSWORD = "itsasecret";

Check the MQ Error Logs

Refer to IBM MQ — Error Logs for details on the MQ Error Logs. Here is an example of one possible exception in the Error Log, which identifies that channel «MANAGER01.CHANNEL01.SVR» was blocked. In this scenario, you would use the display chlauth command to confirm that «client.example.com» does indeed not have access to channel «MANAGER01.CHANNEL01.SVR».

The set chlauth command can be used to add authority to the channel.

If the log has «AMQ9557E Queue Manager User ID initialization failed», check out my article Resolve «AMQ9557E Queue Manager User ID initialization failed»

mm/dd/yyyy hh:mm:ss - Process(18271.9654) User(mqm) Program(amqrmppa)
                    Host(mq.example.com) Installation(Installation1)
                    VRMF(9.1.0.3) QMgr(MANAGER01)
                    Time(yyyy-mm-ddThh:mm:ss.sss)
                    RemoteHost(10.1.2.3)
                    CommentInsert1(MANAGER01.CHANNEL01.SVR)
                    CommentInsert2(SERVER01 (10.4.5.6))
                    CommentInsert3(CLNTUSER(john.doe) ADDRESS(client.example.com))

AMQ9777E: Channel was blocked

EXPLANATION:
The inbound channel 'MANAGER01.CHANNEL01.SVR' was blocked from address 'client.example.com
(10.4.5.6)' because the active values of the channel matched a record
configured with USERSRC(NOACCESS). The active values of the channel were
'CLNTUSER(john.doe) ADDRESS(client.example.com)'.

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