Module java.base
Package javax.net.ssl

# Class X509ExtendedKeyManager

java.lang.Object
javax.net.ssl.X509ExtendedKeyManager

All Implemented Interfaces:
  `KeyManager`, `X509KeyManager`

public abstract class X509ExtendedKeyManager extends Object implements X509KeyManager
Abstract class that provides for extension of the X509KeyManager interface.

Methods in this class should be overridden to provide actual implementations.

Since:
  1.5

## Constructor Summary

Constructors
Modifier
Constructor
Description
`protected`
`X509ExtendedKeyManager()`
Constructor used by subclasses only.

## Method Summary

Modifier and Type
Method
Description
`String`
`chooseEngineClientAlias(String[] keyType, Principal[] issuers, SSLEngine engine)`
Choose an alias to authenticate the client side of an `SSLEngine` connection given the public key type and the list of certificate issuer authorities recognized by the peer (if any).
`String`
`chooseEngineServerAlias(String keyType, Principal[] issuers, SSLEngine engine)`
Choose an alias to authenticate the server side of an `SSLEngine` connection given the public key type and the list of certificate issuer authorities recognized by the peer (if any).

### Methods declared in class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

### Methods declared in interface javax.net.ssl.X509KeyManager

`chooseClientAlias, chooseServerAlias, getCertificateChain, getClientAliases, getPrivateKey, getServerAliases`

## Constructor Details

### X509ExtendedKeyManager

protected X509ExtendedKeyManager()
Constructor used by subclasses only.

## Method Details

### chooseEngineClientAlias

public String chooseEngineClientAlias(String[] keyType, Principal[] issuers, SSLEngine engine)
Choose an alias to authenticate the client side of an `SSLEngine` connection given the public key type and the list of certificate issuer authorities recognized by the peer (if any).

The default implementation returns null.

Parameters:
  `keyType` - the key algorithm type name(s), ordered with the most-preferred key type first.
  `issuers` - the list of acceptable CA issuer subject names or null if it does not matter which issuers are used.
  `engine` - the `SSLEngine` to be used for this connection. This parameter can be null, which indicates that implementations of this interface are free to select an alias applicable to any engine.
Returns:
  the alias name for the desired key, or null if there are no matches.

### chooseEngineServerAlias

public String chooseEngineServerAlias(String keyType, Principal[] issuers, SSLEngine engine)
Choose an alias to authenticate the server side of an `SSLEngine` connection given the public key type and the list of certificate issuer authorities recognized by the peer (if any).

The default implementation returns null.

Parameters:
  `keyType` - the key algorithm type name.
  `issuers` - the list of acceptable CA issuer subject names or null if it does not matter which issuers are used.
  `engine` - the `SSLEngine` to be used for this connection. This parameter can be null, which indicates that implementations of this interface are free to select an alias applicable to any engine.
Returns:
  the alias name for the desired key, or null if there are no matches.