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https://issues.apache.org/jira/browse/FLINK-35371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gabor Somogyi closed FLINK-35371.
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> Allow the keystore and truststore type to configured for SSL
> ------------------------------------------------------------
>
> Key: FLINK-35371
> URL: https://issues.apache.org/jira/browse/FLINK-35371
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network
> Affects Versions: 1.19.0
> Reporter: Ammar Master
> Assignee: Ammar Master
> Priority: Minor
> Labels: SSL, pull-request-available
> Fix For: 1.20.0
>
>
> Flink always creates a keystore and trustore using the [default
> type|https://github.com/apache/flink/blob/b87ead743dca161cdae8a1fef761954d206b81fb/flink-runtime/src/main/java/org/apache/flink/runtime/net/SSLUtils.java#L236]
> defined in the JDK, which in most cases is JKS.
> {code}
> KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
> {code}
> We should add other configuration options to set the type explicitly to
> support other custom formats, and match the options provided by other
> applications by
> [Spark|https://spark.apache.org/docs/latest/security.html#:~:text=the%20key%20store.-,%24%7Bns%7D.keyStoreType,-JKS]
> and
> [Kafka|https://kafka.apache.org/documentation/#:~:text=per%2Dbroker-,ssl.keystore.type,-The%20file%20format]
> already. The default would continue to be specified by the JDK.
>
> The SSLContext for the REST API can read the configuration option directly,
> and we need to add extra logic to the
> [CustomSSLEngineProvider|https://github.com/apache/flink/blob/master/flink-rpc/flink-rpc-akka/src/main/java/org/apache/flink/runtime/rpc/pekko/CustomSSLEngineProvider.java]
> for Pekko.
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