Module jcifs

Package org.codelibs.jcifs.smb.internal.smb2.nego

Class EncryptionNegotiateContext

java.lang.Object

org.codelibs.jcifs.smb.internal.smb2.nego.EncryptionNegotiateContext

All Implemented Interfaces:

Decodable, Encodable, NegotiateContextRequest, NegotiateContextResponse

public class EncryptionNegotiateContext
extends Object
implements NegotiateContextRequest, NegotiateContextResponse

SMB2 Encryption Negotiate Context. This negotiate context is used in SMB 3.x to negotiate encryption capabilities and cipher suites.

Author:

mbechler

Field Summary

Fields

Modifier and Type	Field	Description
static final int	CIPHER_AES128_CCM	AES 128 CCM
static final int	CIPHER_AES128_GCM	AES 128 GCM
static final int	NEGO_CTX_ENC_TYPE	Context type

Constructor Summary

Constructors

Constructor	Description
EncryptionNegotiateContext()	Default constructor for decoding.
EncryptionNegotiateContext(Configuration config, int[] ciphers)	Constructs an encryption negotiate context.

Method Summary

Modifier and Type	Method	Description
int	decode(byte[] buffer, int bufferIndex, int len)	Decode data from a byte buffer
int	encode(byte[] dst, int dstIndex)	Encodes this object into the specified byte array.
int[]	getCiphers()	Gets the supported encryption ciphers.
int	getContextType()	Gets the negotiate context type.
int	size()	Returns the size in bytes that this object will occupy when encoded.

Methods inherited from class java.lang.Object

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

Field Details

NEGO_CTX_ENC_TYPE

public static final int NEGO_CTX_ENC_TYPE

Context type

See Also:

• Constant Field Values

CIPHER_AES128_CCM

public static final int CIPHER_AES128_CCM

AES 128 CCM

See Also:

• Constant Field Values

CIPHER_AES128_GCM

public static final int CIPHER_AES128_GCM

AES 128 GCM

See Also:

• Constant Field Values

Constructor Details

EncryptionNegotiateContext

public EncryptionNegotiateContext(Configuration config,
 int[] ciphers)

Constructs an encryption negotiate context.

Parameters:

config - the configuration (currently unused)

ciphers - array of encryption cipher IDs to negotiate

EncryptionNegotiateContext

public EncryptionNegotiateContext()

Default constructor for decoding.

Method Details

getCiphers

public int[] getCiphers()

Gets the supported encryption ciphers.

Returns:

array of encryption cipher IDs

getContextType

public int getContextType()

Gets the negotiate context type.

Specified by:

getContextType in interface NegotiateContextRequest

Specified by:

getContextType in interface NegotiateContextResponse

Returns:

the SMB2 negotiate context type

See Also:

• NegotiateContextRequest.getContextType()

encode

public int encode(byte[] dst,
 int dstIndex)

Encodes this object into the specified byte array.

Specified by:

encode in interface Encodable

Parameters:

dst - the destination byte array to encode into

dstIndex - the starting index in the destination array

Returns:

encoded length

See Also:

• Encodable.encode(byte[], int)

decode

public int decode(byte[] buffer,
 int bufferIndex,
 int len)
           throws SMBProtocolDecodingException

Decode data from a byte buffer

Specified by:

decode in interface Decodable

Parameters:

buffer - the byte buffer containing the data to decode

bufferIndex - the starting index in the buffer

len - the maximum length of data to decode

Returns:

decoded length

Throws:

SMBProtocolDecodingException - if decoding fails

See Also:

• Decodable.decode(byte[], int, int)

size

public int size()

Returns the size in bytes that this object will occupy when encoded.

Specified by:

size in interface Encodable

Returns:

the encoded size

See Also:

• Encodable.size()