org.conscrypt

Class OpenSSLSocketImpl

java.lang.Object

java.net.Socket

javax.net.ssl.SSLSocket

org.conscrypt.OpenSSLSocketImpl

All Implemented Interfaces:

Closeable, AutoCloseable, NativeCrypto.SSLHandshakeCallbacks, SSLParametersImpl.AliasChooser, SSLParametersImpl.PSKCallbacks

Direct Known Subclasses:

OpenSSLSocketImplWrapper

public class OpenSSLSocketImpl
extends SSLSocket
implements NativeCrypto.SSLHandshakeCallbacks, SSLParametersImpl.AliasChooser, SSLParametersImpl.PSKCallbacks

Implementation of the class OpenSSLSocketImpl based on OpenSSL.

Extensions to SSLSocket include:

• handshake timeout
• session tickets
• Server Name Indication

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	OpenSSLSocketImpl(InetAddress address, int port, InetAddress clientAddress, int clientPort, SSLParametersImpl sslParameters)
protected	OpenSSLSocketImpl(InetAddress address, int port, SSLParametersImpl sslParameters)
protected	OpenSSLSocketImpl(Socket socket, String hostname, int port, boolean autoClose, SSLParametersImpl sslParameters) Create an SSL socket that wraps another socket.
protected	OpenSSLSocketImpl(SSLParametersImpl sslParameters)
protected	OpenSSLSocketImpl(String hostname, int port, InetAddress clientAddress, int clientPort, SSLParametersImpl sslParameters)
protected	OpenSSLSocketImpl(String hostname, int port, SSLParametersImpl sslParameters)

Method Summary

Modifier and Type	Method and Description
void	addHandshakeCompletedListener(HandshakeCompletedListener listener) Registers the specified listener to receive notification on completion of a handshake on this connection.
String	chooseClientAlias(X509KeyManager keyManager, X500Principal[] issuers, String[] keyTypes)
String	chooseClientPSKIdentity(PSKKeyManager keyManager, String identityHint)
String	chooseServerAlias(X509KeyManager keyManager, String keyType)
String	chooseServerPSKIdentityHint(PSKKeyManager keyManager)
void	clientCertificateRequested(byte[] keyTypeBytes, byte[][] asn1DerEncodedPrincipals) Called on an SSL client when the server requests (or requires a certificate).
int	clientPSKKeyRequested(String identityHint, byte[] identity, byte[] key) Gets the key to be used in client mode for this connection in Pre-Shared Key (PSK) key exchange.
void	close() Closes the socket.
protected void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
byte[]	getAlpnSelectedProtocol() Returns the protocol agreed upon by client and server, or null if no protocol was agreed upon.
byte[]	getChannelId() Gets the TLS Channel ID for this server socket.
String[]	getEnabledCipherSuites() Returns the names of the enabled cipher suites.
String[]	getEnabledProtocols() Returns the names of the enabled protocols.
boolean	getEnableSessionCreation() Returns whether new SSL sessions may be created by this socket or if existing sessions must be reused.
FileDescriptor	getFileDescriptor$()
InputStream	getInputStream() Returns an input stream to read data from this socket.
boolean	getNeedClientAuth() Returns true if the server socket should require client authentication.
byte[]	getNpnSelectedProtocol() Returns the protocol agreed upon by client and server, or null if no protocol was agreed upon.
OutputStream	getOutputStream() Returns an output stream to write data into this socket.
int	getPort() Returns the port number of the target host this socket is connected to, or 0 if this socket is not yet connected.
SecretKey	getPSKKey(PSKKeyManager keyManager, String identityHint, String identity)
SSLSession	getSession() Returns the SSLSession for this connection.
int	getSoTimeout() Returns this socket's receive timeout.
int	getSoWriteTimeout() Note write timeouts are not part of the javax.net.ssl.SSLSocket API
String[]	getSupportedCipherSuites() Returns the names of the supported cipher suites.
String[]	getSupportedProtocols() Returns the names of the supported protocols.
boolean	getUseClientMode() Returns true if this connection will act in client mode when handshaking.
boolean	getWantClientAuth() Returns true if the server should request client authentication.
void	onSSLStateChange(long sslSessionNativePtr, int type, int val) Called when SSL state changes.
void	removeHandshakeCompletedListener(HandshakeCompletedListener listener) Removes the specified handshake completion listener.
void	sendUrgentData(int data) Sends the given single byte data which is represented by the lowest octet of value as "TCP urgent data".
int	serverPSKKeyRequested(String identityHint, String identity, byte[] key) Gets the key to be used in server mode for this connection in Pre-Shared Key (PSK) key exchange.
void	setAlpnProtocols(byte[] alpnProtocols) Sets the list of protocols this peer is interested in.
void	setChannelIdEnabled(boolean enabled) Enables/disables TLS Channel ID for this server socket.
void	setChannelIdPrivateKey(PrivateKey privateKey) Sets the PrivateKey to be used for TLS Channel ID by this client socket.
void	setEnabledCipherSuites(String[] suites) Sets the names of the cipher suites to be enabled.
void	setEnabledProtocols(String[] protocols) Sets the names of the protocols to be enabled.
void	setEnableSessionCreation(boolean flag) Sets whether new SSL sessions may be created by this socket or if existing sessions must be reused.
void	setHandshakeTimeout(int handshakeTimeoutMilliseconds) Set the handshake timeout on this socket.
void	setHostname(String hostname) This method enables Server Name Indication
void	setNeedClientAuth(boolean need) Sets whether the server should require client authentication.
void	setNpnProtocols(byte[] npnProtocols) Sets the list of protocols this peer is interested in.
void	setOOBInline(boolean on) Sets this socket's SocketOptions.SO_OOBINLINE option.
void	setSoTimeout(int readTimeoutMilliseconds) Sets this socket's read timeout in milliseconds.
void	setSoWriteTimeout(int writeTimeoutMilliseconds) Note write timeouts are not part of the javax.net.ssl.SSLSocket API
void	setUseClientMode(boolean mode) Sets whether this connection should act in client mode when handshaking.
void	setUseSessionTickets(boolean useSessionTickets) This method enables session ticket support.
void	setWantClientAuth(boolean want) Sets whether the server should request client authentication.
void	startHandshake() Starts a TLS/SSL handshake on this connection using some native methods from the OpenSSL library.
void	verifyCertificateChain(long sslSessionNativePtr, long[] certRefs, String authMethod) Verify that we trust the certificate chain is trusted.

Methods inherited from class javax.net.ssl.SSLSocket

getSSLParameters, setSSLParameters, shutdownInput, shutdownOutput

Methods inherited from class java.net.Socket

bind, connect, connect, getChannel, getInetAddress, getKeepAlive, getLocalAddress, getLocalPort, getLocalSocketAddress, getOOBInline, getReceiveBufferSize, getRemoteSocketAddress, getReuseAddress, getReusePort, getSendBufferSize, getSoLinger, getTcpNoDelay, getTrafficClass, isBound, isClosed, isConnected, isInputShutdown, isOutputShutdown, onBind, onClose, onConnect, setKeepAlive, setPerformancePreferences, setReceiveBufferSize, setReuseAddress, setReusePort, setSendBufferSize, setSocketImplFactory, setSoLinger, setTcpNoDelay, setTrafficClass, toString

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OpenSSLSocketImpl

protected OpenSSLSocketImpl(SSLParametersImpl sslParameters)
                     throws IOException

Throws:

IOException

OpenSSLSocketImpl

protected OpenSSLSocketImpl(String hostname,
                            int port,
                            SSLParametersImpl sslParameters)
                     throws IOException

Throws:

IOException

OpenSSLSocketImpl

protected OpenSSLSocketImpl(InetAddress address,
                            int port,
                            SSLParametersImpl sslParameters)
                     throws IOException

Throws:

IOException

OpenSSLSocketImpl

protected OpenSSLSocketImpl(String hostname,
                            int port,
                            InetAddress clientAddress,
                            int clientPort,
                            SSLParametersImpl sslParameters)
                     throws IOException

Throws:

IOException

OpenSSLSocketImpl

protected OpenSSLSocketImpl(InetAddress address,
                            int port,
                            InetAddress clientAddress,
                            int clientPort,
                            SSLParametersImpl sslParameters)
                     throws IOException

Throws:

IOException

OpenSSLSocketImpl

protected OpenSSLSocketImpl(Socket socket,
                            String hostname,
                            int port,
                            boolean autoClose,
                            SSLParametersImpl sslParameters)
                     throws IOException

Create an SSL socket that wraps another socket. Invoked by OpenSSLSocketImplWrapper constructor.

Throws:

IOException

Method Detail

startHandshake

public void startHandshake()
                    throws IOException

Starts a TLS/SSL handshake on this connection using some native methods from the OpenSSL library. It can negotiate new encryption keys, change cipher suites, or initiate a new session. The certificate chain is verified if the correspondent property in java.Security is set. All listeners are notified at the end of the TLS/SSL handshake.

Specified by:

startHandshake in class SSLSocket

Throws:

IOException - if an error occurs.

getPort

public int getPort()

Description copied from class: Socket

Returns the port number of the target host this socket is connected to, or 0 if this socket is not yet connected.

Overrides:

getPort in class Socket

clientCertificateRequested

public void clientCertificateRequested(byte[] keyTypeBytes,
                                       byte[][] asn1DerEncodedPrincipals)
                                throws CertificateEncodingException,
                                       SSLException

Description copied from interface: NativeCrypto.SSLHandshakeCallbacks

Called on an SSL client when the server requests (or requires a certificate). The client can respond by using SSL_use_certificate and SSL_use_PrivateKey to set a certificate if has an appropriate one available, similar to how the server provides its certificate.

Specified by:

clientCertificateRequested in interface NativeCrypto.SSLHandshakeCallbacks

Parameters:

keyTypeBytes - key types supported by the server, convertible to strings with #keyType

asn1DerEncodedPrincipals - CAs known to the server

Throws:

CertificateEncodingException

SSLException

clientPSKKeyRequested

public int clientPSKKeyRequested(String identityHint,
                                 byte[] identity,
                                 byte[] key)

Description copied from interface: NativeCrypto.SSLHandshakeCallbacks

Gets the key to be used in client mode for this connection in Pre-Shared Key (PSK) key exchange.

Specified by:

clientPSKKeyRequested in interface NativeCrypto.SSLHandshakeCallbacks

Parameters:

identityHint - PSK identity hint provided by the server or null if no hint provided.

identity - buffer to be populated with PSK identity (NULL-terminated modified UTF-8) by this method. This identity will be provided to the server.

key - buffer to be populated with key material by this method.

Returns:

number of bytes this method stored in the key buffer or 0 if an error occurred in which case the handshake will be aborted.

serverPSKKeyRequested

public int serverPSKKeyRequested(String identityHint,
                                 String identity,
                                 byte[] key)

Description copied from interface: NativeCrypto.SSLHandshakeCallbacks

Gets the key to be used in server mode for this connection in Pre-Shared Key (PSK) key exchange.

Specified by:

serverPSKKeyRequested in interface NativeCrypto.SSLHandshakeCallbacks

Parameters:

identityHint - PSK identity hint provided by this server to the client or null if no hint was provided.

identity - PSK identity provided by the client.

key - buffer to be populated with key material by this method.

Returns:

number of bytes this method stored in the key buffer or 0 if an error occurred in which case the handshake will be aborted.

onSSLStateChange

public void onSSLStateChange(long sslSessionNativePtr,
                             int type,
                             int val)

Description copied from interface: NativeCrypto.SSLHandshakeCallbacks

Called when SSL state changes. This could be handshake completion.

Specified by:

onSSLStateChange in interface NativeCrypto.SSLHandshakeCallbacks

verifyCertificateChain

public void verifyCertificateChain(long sslSessionNativePtr,
                                   long[] certRefs,
                                   String authMethod)
                            throws CertificateException

Description copied from interface: NativeCrypto.SSLHandshakeCallbacks

Verify that we trust the certificate chain is trusted.

Specified by:

verifyCertificateChain in interface NativeCrypto.SSLHandshakeCallbacks

Parameters:

sslSessionNativePtr - pointer to a reference of the SSL_SESSION

certRefs - chain of X.509 certificate references

authMethod - auth algorithm name

Throws:

CertificateException - if the certificate is untrusted

getInputStream

public InputStream getInputStream()
                           throws IOException

Description copied from class: Socket

Returns an input stream to read data from this socket. If the socket has an associated SocketChannel and that channel is in non-blocking mode then reads from the stream will throw a IllegalBlockingModeException.

Overrides:

getInputStream in class Socket

Returns:

the byte-oriented input stream.

Throws:

IOException - if an error occurs while creating the input stream or the socket is in an invalid state.

getOutputStream

public OutputStream getOutputStream()
                             throws IOException

Description copied from class: Socket

Returns an output stream to write data into this socket. If the socket has an associated SocketChannel and that channel is in non-blocking mode then writes to the stream will throw a IllegalBlockingModeException.

Overrides:

getOutputStream in class Socket

Returns:

the byte-oriented output stream.

Throws:

IOException - if an error occurs while creating the output stream or the socket is in an invalid state.

getSession

public SSLSession getSession()

Description copied from class: SSLSocket

Returns the SSLSession for this connection. If necessary, a handshake will be initiated, in which case this method will block until the handshake has been established. If the handshake fails, an invalid session object will be returned.

Specified by:

getSession in class SSLSocket

Returns:

the session object.

addHandshakeCompletedListener

public void addHandshakeCompletedListener(HandshakeCompletedListener listener)

Description copied from class: SSLSocket

Registers the specified listener to receive notification on completion of a handshake on this connection.

Specified by:

addHandshakeCompletedListener in class SSLSocket

Parameters:

listener - the listener to register.

removeHandshakeCompletedListener

public void removeHandshakeCompletedListener(HandshakeCompletedListener listener)

Description copied from class: SSLSocket

Removes the specified handshake completion listener.

Specified by:

removeHandshakeCompletedListener in class SSLSocket

Parameters:

listener - the listener to remove.

getEnableSessionCreation

public boolean getEnableSessionCreation()

Description copied from class: SSLSocket

Returns whether new SSL sessions may be created by this socket or if existing sessions must be reused.

Specified by:

getEnableSessionCreation in class SSLSocket

Returns:

true if new sessions may be created, otherwise false.

setEnableSessionCreation

public void setEnableSessionCreation(boolean flag)

Description copied from class: SSLSocket

Sets whether new SSL sessions may be created by this socket or if existing sessions must be reused. If flag is false and there are no sessions to resume, handshaking will fail.

Specified by:

setEnableSessionCreation in class SSLSocket

Parameters:

flag - true if new sessions may be created.

getSupportedCipherSuites

public String[] getSupportedCipherSuites()

Description copied from class: SSLSocket

Returns the names of the supported cipher suites.

Specified by:

getSupportedCipherSuites in class SSLSocket

getEnabledCipherSuites

public String[] getEnabledCipherSuites()

Description copied from class: SSLSocket

Returns the names of the enabled cipher suites.

Specified by:

getEnabledCipherSuites in class SSLSocket

setEnabledCipherSuites

public void setEnabledCipherSuites(String[] suites)

Description copied from class: SSLSocket

Sets the names of the cipher suites to be enabled. Only cipher suites returned by SSLSocket.getSupportedCipherSuites() are allowed.

Specified by:

setEnabledCipherSuites in class SSLSocket

Parameters:

suites - the names of the to be enabled cipher suites.

getSupportedProtocols

public String[] getSupportedProtocols()

Description copied from class: SSLSocket

Returns the names of the supported protocols.

Specified by:

getSupportedProtocols in class SSLSocket

getEnabledProtocols

public String[] getEnabledProtocols()

Description copied from class: SSLSocket

Returns the names of the enabled protocols.

Specified by:

getEnabledProtocols in class SSLSocket

setEnabledProtocols

public void setEnabledProtocols(String[] protocols)

Description copied from class: SSLSocket

Sets the names of the protocols to be enabled. Only protocols returned by SSLSocket.getSupportedProtocols() are allowed.

Specified by:

setEnabledProtocols in class SSLSocket

Parameters:

protocols - the names of the to be enabled protocols.

setUseSessionTickets

public void setUseSessionTickets(boolean useSessionTickets)

This method enables session ticket support.

Parameters:

useSessionTickets - True to enable session tickets

setHostname

public void setHostname(String hostname)

This method enables Server Name Indication

Parameters:

hostname - the desired SNI hostname, or null to disable

setChannelIdEnabled

public void setChannelIdEnabled(boolean enabled)

Enables/disables TLS Channel ID for this server socket.

This method needs to be invoked before the handshake starts.

Throws:

IllegalStateException - if this is a client socket or if the handshake has already started.

getChannelId

public byte[] getChannelId()
                    throws SSLException

Gets the TLS Channel ID for this server socket. Channel ID is only available once the handshake completes.

Returns:

channel ID or null if not available.

Throws:

IllegalStateException - if this is a client socket or if the handshake has not yet completed.

SSLException - if channel ID is available but could not be obtained.

setChannelIdPrivateKey

public void setChannelIdPrivateKey(PrivateKey privateKey)

Sets the PrivateKey to be used for TLS Channel ID by this client socket.

This method needs to be invoked before the handshake starts.

Parameters:

privateKey - private key (enables TLS Channel ID) or null for no key (disables TLS Channel ID). The private key must be an Elliptic Curve (EC) key based on the NIST P-256 curve (aka SECG secp256r1 or ANSI X9.62 prime256v1).

Throws:

IllegalStateException - if this is a server socket or if the handshake has already started.

getUseClientMode

public boolean getUseClientMode()

Description copied from class: SSLSocket

Returns true if this connection will act in client mode when handshaking.

Specified by:

getUseClientMode in class SSLSocket

setUseClientMode

public void setUseClientMode(boolean mode)

Description copied from class: SSLSocket

Sets whether this connection should act in client mode when handshaking.

Specified by:

setUseClientMode in class SSLSocket

Parameters:

mode - true if this connection should act in client mode, false if not.

getWantClientAuth

public boolean getWantClientAuth()

Description copied from class: SSLSocket

Returns true if the server should request client authentication. This does not apply to sockets in client mode.

Specified by:

getWantClientAuth in class SSLSocket

getNeedClientAuth

public boolean getNeedClientAuth()

Description copied from class: SSLSocket

Returns true if the server socket should require client authentication. This does not apply to sockets in client mode.

Specified by:

getNeedClientAuth in class SSLSocket

setNeedClientAuth

public void setNeedClientAuth(boolean need)

Description copied from class: SSLSocket

Sets whether the server should require client authentication. This does not apply to sockets in client mode. Client authentication is one of the following:

• authentication required
• authentication requested
• no authentication needed

This method overrides the setting of SSLSocket.setWantClientAuth(boolean).

Specified by:

setNeedClientAuth in class SSLSocket

setWantClientAuth

public void setWantClientAuth(boolean want)

Description copied from class: SSLSocket

Sets whether the server should request client authentication. Unlike SSLSocket.setNeedClientAuth(boolean) this won't stop the negotiation if the client doesn't authenticate. This does not apply to sockets in client mode.The client authentication is one of:

• authentication required
• authentication requested
• no authentication needed

This method overrides the setting of SSLSocket.setNeedClientAuth(boolean).

Specified by:

setWantClientAuth in class SSLSocket

sendUrgentData

public void sendUrgentData(int data)
                    throws IOException

Description copied from class: Socket

Sends the given single byte data which is represented by the lowest octet of value as "TCP urgent data".

Overrides:

sendUrgentData in class Socket

Parameters:

data - the byte of urgent data to be sent.

Throws:

IOException - if an error occurs while sending urgent data.

setOOBInline

public void setOOBInline(boolean on)
                  throws SocketException

Description copied from class: Socket

Sets this socket's SocketOptions.SO_OOBINLINE option.

Overrides:

setOOBInline in class Socket

Throws:

SocketException

setSoTimeout

public void setSoTimeout(int readTimeoutMilliseconds)
                  throws SocketException

Description copied from class: Socket

Sets this socket's read timeout in milliseconds. Use 0 for no timeout. To take effect, this option must be set before the blocking method was called.

Overrides:

setSoTimeout in class Socket

Throws:

SocketException

getSoTimeout

public int getSoTimeout()
                 throws SocketException

Description copied from class: Socket

Returns this socket's receive timeout.

Overrides:

getSoTimeout in class Socket

Throws:

SocketException

setSoWriteTimeout

public void setSoWriteTimeout(int writeTimeoutMilliseconds)
                       throws SocketException

Note write timeouts are not part of the javax.net.ssl.SSLSocket API

Throws:

SocketException

getSoWriteTimeout

public int getSoWriteTimeout()
                      throws SocketException

Note write timeouts are not part of the javax.net.ssl.SSLSocket API

Throws:

SocketException

setHandshakeTimeout

public void setHandshakeTimeout(int handshakeTimeoutMilliseconds)
                         throws SocketException

Set the handshake timeout on this socket. This timeout is specified in milliseconds and will be used only during the handshake process.

Throws:

SocketException

close

public void close()
           throws IOException

Description copied from class: Socket

Closes the socket. It is not possible to reconnect or rebind to this socket thereafter which means a new socket instance has to be created.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class Socket

Throws:

IOException - if an error occurs while closing the socket.

finalize

protected void finalize()
                 throws Throwable

Description copied from class: Object

Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.

Note that objects that override finalize are significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicit close method (and implement Closeable), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like a BigInteger where typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.

If you must use finalizers, consider at least providing your own ReferenceQueue and having your own thread process that queue.

Unlike constructors, finalizers are not automatically chained. You are responsible for calling super.finalize() yourself.

Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.

Overrides:

finalize in class Object

Throws:

Throwable

getFileDescriptor$

public FileDescriptor getFileDescriptor$()

Overrides:

getFileDescriptor$ in class Socket

getNpnSelectedProtocol

public byte[] getNpnSelectedProtocol()

Returns the protocol agreed upon by client and server, or null if no protocol was agreed upon.

getAlpnSelectedProtocol

public byte[] getAlpnSelectedProtocol()

Returns the protocol agreed upon by client and server, or null if no protocol was agreed upon.

setNpnProtocols

public void setNpnProtocols(byte[] npnProtocols)

Sets the list of protocols this peer is interested in. If null no protocols will be used.

Parameters:

npnProtocols - a non-empty array of protocol names. From SSL_select_next_proto, "vector of 8-bit, length prefixed byte strings. The length byte itself is not included in the length. A byte string of length 0 is invalid. No byte string may be truncated.".

setAlpnProtocols

public void setAlpnProtocols(byte[] alpnProtocols)

Sets the list of protocols this peer is interested in. If the list is null, no protocols will be used.

Parameters:

alpnProtocols - a non-empty array of protocol names. From SSL_select_next_proto, "vector of 8-bit, length prefixed byte strings. The length byte itself is not included in the length. A byte string of length 0 is invalid. No byte string may be truncated.".

chooseServerAlias

public String chooseServerAlias(X509KeyManager keyManager,
                                String keyType)

Specified by:

chooseServerAlias in interface SSLParametersImpl.AliasChooser

chooseClientAlias

public String chooseClientAlias(X509KeyManager keyManager,
                                X500Principal[] issuers,
                                String[] keyTypes)

Specified by:

chooseClientAlias in interface SSLParametersImpl.AliasChooser

chooseServerPSKIdentityHint

public String chooseServerPSKIdentityHint(PSKKeyManager keyManager)

Specified by:

chooseServerPSKIdentityHint in interface SSLParametersImpl.PSKCallbacks

chooseClientPSKIdentity

public String chooseClientPSKIdentity(PSKKeyManager keyManager,
                                      String identityHint)

Specified by:

chooseClientPSKIdentity in interface SSLParametersImpl.PSKCallbacks

getPSKKey

public SecretKey getPSKKey(PSKKeyManager keyManager,
                           String identityHint,
                           String identity)

Specified by:

getPSKKey in interface SSLParametersImpl.PSKCallbacks