Module java.base

Package javax.net.ssl

Class SSLEngineResult

java.lang.Object

javax.net.ssl.SSLEngineResult

public class SSLEngineResult
extends Object

An encapsulation of the result state produced by SSLEngine I/O calls.

A SSLEngine provides a means for establishing secure communication sessions between two peers. SSLEngine operations typically consume bytes from an input buffer and produce bytes in an output buffer. This class provides operational result values describing the state of the SSLEngine, including indications of what operations are needed to finish an ongoing handshake. Lastly, it reports the number of bytes consumed and produced as a result of this operation.

Since:

1.5

See Also:

• SSLEngine
• SSLEngine.wrap(ByteBuffer, ByteBuffer)
• SSLEngine.unwrap(ByteBuffer, ByteBuffer)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SSLEngineResult.HandshakeStatus	An SSLEngineResult enum describing the current handshaking state of this SSLEngine.
static enum	SSLEngineResult.Status	An SSLEngineResult enum describing the overall result of the SSLEngine operation.

Constructor Summary

Constructors

Constructor	Description
SSLEngineResult(SSLEngineResult.Status status, SSLEngineResult.HandshakeStatus handshakeStatus, int bytesConsumed, int bytesProduced)	Initializes a new instance of this class.
SSLEngineResult(SSLEngineResult.Status status, SSLEngineResult.HandshakeStatus handshakeStatus, int bytesConsumed, int bytesProduced, long sequenceNumber)	Initializes a new instance of this class.

Method Summary

Modifier and Type	Method	Description
final int	bytesConsumed()	Returns the number of bytes consumed from the input buffer.
final int	bytesProduced()	Returns the number of bytes written to the output buffer.
final SSLEngineResult.HandshakeStatus	getHandshakeStatus()	Gets the handshake status of this SSLEngine operation.
final SSLEngineResult.Status	getStatus()	Gets the return value of this SSLEngine operation.
final long	sequenceNumber()	Returns the sequence number of the produced or consumed SSL/TLS/DTLS record (optional operation).
String	toString()	Returns a String representation of this object.

Methods declared in class java.lang.Object

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

Constructor Details

SSLEngineResult

public SSLEngineResult(SSLEngineResult.Status status,
 SSLEngineResult.HandshakeStatus handshakeStatus,
 int bytesConsumed,
 int bytesProduced)

Initializes a new instance of this class.

Parameters:

status - the return value of the operation.

handshakeStatus - the current handshaking status.

bytesConsumed - the number of bytes consumed from the source ByteBuffer

bytesProduced - the number of bytes placed into the destination ByteBuffer

Throws:

IllegalArgumentException - if the status or handshakeStatus arguments are null, or if bytesConsumed or bytesProduced is negative.

SSLEngineResult

public SSLEngineResult(SSLEngineResult.Status status,
 SSLEngineResult.HandshakeStatus handshakeStatus,
 int bytesConsumed,
 int bytesProduced,
 long sequenceNumber)

Initializes a new instance of this class.

Parameters:

status - the return value of the operation.

handshakeStatus - the current handshaking status.

bytesConsumed - the number of bytes consumed from the source ByteBuffer

bytesProduced - the number of bytes placed into the destination ByteBuffer

sequenceNumber - the sequence number (unsigned long) of the produced or consumed SSL/TLS/DTLS record, or -1L if no record produced or consumed

Throws:

IllegalArgumentException - if the status or handshakeStatus arguments are null, or if bytesConsumed or bytesProduced is negative

Since:

9

Method Details

getStatus

public final SSLEngineResult.Status getStatus()

Gets the return value of this SSLEngine operation.

Returns:

the return value

getHandshakeStatus

public final SSLEngineResult.HandshakeStatus getHandshakeStatus()

Gets the handshake status of this SSLEngine operation.

Returns:

the handshake status

bytesConsumed

public final int bytesConsumed()

Returns the number of bytes consumed from the input buffer.

Returns:

the number of bytes consumed.

bytesProduced

public final int bytesProduced()

Returns the number of bytes written to the output buffer.

Returns:

the number of bytes produced

sequenceNumber

public final long sequenceNumber()

Returns the sequence number of the produced or consumed SSL/TLS/DTLS record (optional operation).

API Note:

Note that sequence number is an unsigned long and cannot exceed -1L. It is desired to use the unsigned long comparing mode for comparison of unsigned long values (see also Long.compareUnsigned()).

For DTLS protocols, the first 16 bits of the sequence number is a counter value (epoch) that is incremented on every cipher state change. The remaining 48 bits on the right side of the sequence number represents the sequence of the record, which is maintained separately for each epoch.

Implementation Note:

It is recommended that providers should never allow the sequence number incremented to -1L. If the sequence number is close to wrapping, renegotiate should be requested, otherwise the connection should be closed immediately. This should be carried on automatically by the underlying implementation.

Returns:

the sequence number of the produced or consumed SSL/TLS/DTLS record; or -1L if no record is produced or consumed, or this operation is not supported by the underlying provider

Since:

9

See Also:

• Long.compareUnsigned(long, long)

toString

public String toString()

Returns a String representation of this object.

Overrides:

toString in class Object

Returns:

a string representation of the object