jcifs.internal.smb2

Class Smb2SigningDigest

java.lang.Object

jcifs.internal.smb2.Smb2SigningDigest

All Implemented Interfaces:

SMBSigningDigest

public class Smb2SigningDigest
extends Object
implements SMBSigningDigest

Author:

mbechler

Constructor Summary

Constructors

Constructor and Description
Smb2SigningDigest(byte[] sessionKey, int dialect, byte[] preauthIntegrityHash)

Method Summary

Modifier and Type	Method and Description
void	sign(byte[] data, int offset, int length, CommonServerMessageBlock request, CommonServerMessageBlock response) Performs MAC signing of the SMB.
boolean	verify(byte[] data, int offset, int length, int extraPad, CommonServerMessageBlock msg) Performs MAC signature verification.

Methods inherited from class java.lang.Object

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

Constructor Detail

Smb2SigningDigest

public Smb2SigningDigest(byte[] sessionKey,
                         int dialect,
                         byte[] preauthIntegrityHash)
                  throws GeneralSecurityException

Parameters:

sessionKey -

dialect -

preauthIntegrityHash -

Throws:

GeneralSecurityException

Method Detail

sign

public void sign(byte[] data,
                 int offset,
                 int length,
                 CommonServerMessageBlock request,
                 CommonServerMessageBlock response)

Performs MAC signing of the SMB. This is done as follows. The signature field of the SMB is overwritten with the sequence number; The MD5 digest of the MAC signing key + the entire SMB is taken; The first 8 bytes of this are placed in the signature field.

Specified by:

sign in interface SMBSigningDigest

Parameters:

data - The data.

offset - The starting offset at which the SMB header begins.

length - The length of the SMB data starting at offset.

request - request message

response - response message

See Also:

SMBSigningDigest.sign(byte[], int, int, jcifs.internal.CommonServerMessageBlock, jcifs.internal.CommonServerMessageBlock)

verify

public boolean verify(byte[] data,
                      int offset,
                      int length,
                      int extraPad,
                      CommonServerMessageBlock msg)

Performs MAC signature verification. This calculates the signature of the SMB and compares it to the signature field on the SMB itself.

Specified by:

verify in interface SMBSigningDigest

Parameters:

data - The data.

offset - The starting offset at which the SMB header begins.

extraPad - extra padding to include in signature

msg - The message to verify

Returns:

whether verification was unsuccessful

See Also:

SMBSigningDigest.verify(byte[], int, int, int, jcifs.internal.CommonServerMessageBlock)