[jira] [Created] (KNOX-1812) The Knox Gateway truststore should be configurable

["Robert Levas (JIRA)" <ji...@apache.org>]

Robert Levas created KNOX-1812:
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             Summary: The Knox Gateway truststore should be configurable
                 Key: KNOX-1812
                 URL: https://issues.apache.org/jira/browse/KNOX-1812
             Project: Apache Knox
          Issue Type: Improvement
          Components: Server
    Affects Versions: 1.3.0
            Reporter: Robert Levas
            Assignee: Robert Levas
             Fix For: 1.3.0


The Knox Gateway truststore should be configurable

Knox relies on a trust store for various purposes
 # The *KnoxCLI* (via a KnoxSession) uses a truststore to trust the connection to the Knox Gateway server
 ** The truststore is determined by the Java system properties ({{javax.net.ssl.trustStore}}, {{javax.net.ssl.trustStorePassword}}) or the JVM's cacerts file
 # The *Knox Gateway* server uses a truststore to trust the connections going out to the services (if connecting via TLS/SSL)
 ** The truststore is set to be the same keystore as the Gateway's identitiy keystore.
 ** See {{org.apache.knox.gateway.dispatch.DefaultHttpClientFactory#createHttpClient}}.
 # The *Knox Gateway* server uses a truststore to trust the user/client connecting to it when clientauth is enabled
 ** The truststore is set to be the same keystore as the Gateway's identity keystore unless one is explicitly specified in the gateway-site.xml file ({{gateway.truststore.path}}, {{gateway.truststore.type}}). If a truststore is explicitly set, the password for the truststore is looked up, using alias name "{{gateway-truststore-password}}", from the alias service.
 ** See {{org.apache.knox.gateway.services.security.impl.JettySSLService#buildSslContextFactory}}.

By making the outgoing connection truststore (#2, from above) configurable, it will be possible to use the same truststore for both incoming and outgoing connections, which will be convenient when services communicate with each other via the Knox Gateway. 

To make sure the truststore configuration is flexible and backwards compatible with older versions of Knox,  new properties should be introduced in the gateway-site.xml file:
* {{gateway.httpclient.truststore.path}}
* {{gateway.httpclient.truststore.type}}
* {{gateway.httpclient.truststore.password.alias}}

Note: This naming convention goes along with the following properties used to configure the Gateway's HTTPClient instance: 
* {{gateway.httpclient.maxConnections}}
* {{gateway.httpclient.connectionTimeout}}
* {{gateway.httpclient.socketTimeout}}

If {{gateway.httpclient.truststore.path}} is not set in the configuration, then Gateway's identity keystore will be used (which is the current implementation); else, the configured truststore details will be used. 
 
Also, to keep things consistent, the password alias name for the _clientauth_ truststore should be configurable using the property name:

* {{gateway.truststore.password.alias}} (default: "{{gateway-truststore-password}}")





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