Module jcifs

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

Class PreauthIntegrityNegotiateContext

java.lang.Object

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

All Implemented Interfaces:

Decodable, Encodable, NegotiateContextRequest, NegotiateContextResponse

public class PreauthIntegrityNegotiateContext
extends Object
implements NegotiateContextRequest, NegotiateContextResponse

SMB2 Pre-authentication Integrity Negotiate Context. This negotiate context is used in SMB 3.1.1 to establish pre-authentication integrity protection against downgrade attacks.

Author:

mbechler

Field Summary

Fields

Modifier and Type	Field	Description
static final int	HASH_ALGO_SHA512	SHA-512
static final int	NEGO_CTX_PREAUTH_TYPE	Context type

Constructor Summary

Constructors

Constructor	Description
PreauthIntegrityNegotiateContext()	Default constructor for deserialization.
PreauthIntegrityNegotiateContext(Configuration config, int[] hashAlgos, byte[] salt)	Constructs a preauth integrity negotiate context with the specified parameters.

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	getContextType()	Gets the negotiate context type.
int[]	getHashAlgos()	Gets the supported hash algorithms for preauth integrity.
byte[]	getSalt()	Gets the salt value used for preauth integrity.
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_PREAUTH_TYPE

public static final int NEGO_CTX_PREAUTH_TYPE

Context type

See Also:

• Constant Field Values

HASH_ALGO_SHA512

public static final int HASH_ALGO_SHA512

SHA-512

See Also:

• Constant Field Values

Constructor Details

PreauthIntegrityNegotiateContext

public PreauthIntegrityNegotiateContext(Configuration config,
 int[] hashAlgos,
 byte[] salt)

Constructs a preauth integrity negotiate context with the specified parameters.

Parameters:

config - the SMB configuration

hashAlgos - the supported hash algorithms

salt - the salt value for preauth integrity

PreauthIntegrityNegotiateContext

public PreauthIntegrityNegotiateContext()

Default constructor for deserialization.

Method Details

getSalt

public byte[] getSalt()

Gets the salt value used for preauth integrity.

Returns:

the salt

getHashAlgos

public int[] getHashAlgos()

Gets the supported hash algorithms for preauth integrity.

Returns:

the hashAlgos

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()