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lishifu
2020-06-30 14:58:21 +08:00
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---
layout: default_docs
title: Custom SSLSocketFactory
header: Chapter 4. Using SSL
resource: media
previoustitle: Configuring the Client
previous: ssl-client.html
nexttitle: Chapter 5. Issuing a Query and Processing the Result
next: query.html
---
PostgreSQL™ provides a way for developers to customize how a SSL connection is
established. This may be used to provide a custom certificate source or other
extensions by allowing the developer to create their own `SSLContext` instance.
The connection URL parameters `sslfactory` allow the user to specify which custom
class to use for creating the `SSLSocketFactory`. The class name specified by `sslfactory`
must extend ` javax.net.ssl.SSLSocketFactory` and be available to the driver's classloader.
This class must have a zero argument constructor or a single argument constructor preferentially taking
a `Properties` argument. There is a simple `org.postgresql.ssl.DefaultJavaSSLFactory` provided which uses the
default java SSLFactory.
Information on how to actually implement such a class is beyond the scope of this
documentation. Places to look for help are the [JSSE Reference Guide](https://docs.oracle.com/javase/8/docs/technotes/guides/security/jsse/JSSERefGuide.html)
and the source to the `NonValidatingFactory` provided by the JDBC driver.