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Client Authentication for Kafka Producer in Liberty Server
We want to run multiple java programmes (in current use case Kafka-Producers) in a single CICS Liberty Server. Authentication on Kafka-Broker side (hosted on our on-premise cloud) is done by client certificates. Our security department requires that we use separate certificates to distinguish different applications. However CICS Liberty Server supports one universal certificate for a given IP-Adress+Port combination, i.e. our Kafka-Broker.
Each Kafka Producer (i.e. Java program on Liberty) can configure/manage its own certificate decentrally, without a central certificate in Liberty Server.
From this keystore the first certificate is grabbed to authenticate and encrypt the connection. This keystore must be password protected, the key in it must also be password protected.
It should be possible to change these properties in different places, but basically everything seems to converge in one place: The Producer is given a Properties object in the Java program when it is created via the constructor Producer(Properties p). This Properties can be given before over these variables.
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