org.apache.directory.shared.kerberos.components

Class Checksum

java.lang.Object

org.apache.directory.shared.kerberos.components.Checksum

All Implemented Interfaces:

org.apache.directory.api.asn1.Asn1Object

public class Checksum
extends java.lang.Object
implements org.apache.directory.api.asn1.Asn1Object

The Checksum structure is used to store a checksum associated to a type. The ASN.1 grammar is :

 Checksum        ::= SEQUENCE {
       cksumtype       [0] Int32,
       checksum        [1] OCTET STRING
 }
 

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	checksum The byte array containing the checksum
private int	checksumBytesLength
private int	checksumLength
private int	checksumTypeLength
private ChecksumType	cksumtype The checksum type used
private static boolean	IS_DEBUG Speedup for logs
private static org.slf4j.Logger	log The logger

Constructor Summary

Constructors

Constructor and Description
Checksum() Creates a new instance of Checksum.
Checksum(ChecksumType cksumtype, byte[] checksum) Creates a new instance of Checksum.

Method Summary

Modifier and Type	Method and Description
int	computeLength() Compute the checksum length
java.nio.ByteBuffer	encode(java.nio.ByteBuffer buffer) Encode the Checksum message to a PDU.
boolean	equals(java.lang.Object o)
ChecksumType	getChecksumType() Returns the ChecksumType.
byte[]	getChecksumValue() Returns the checksum value.
int	hashCode()
void	setChecksumType(ChecksumType cksumType) Set the ChecksumType.
void	setChecksumValue(byte[] checksum) Set the checksum Value.
java.lang.String	toString()
java.lang.String	toString(java.lang.String tabs)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

log

private static final org.slf4j.Logger log

The logger

IS_DEBUG

private static final boolean IS_DEBUG

Speedup for logs

cksumtype

private ChecksumType cksumtype

The checksum type used

checksum

private byte[] checksum

The byte array containing the checksum

checksumTypeLength

private int checksumTypeLength

checksumBytesLength

private int checksumBytesLength

checksumLength

private int checksumLength

Constructor Detail

Checksum

public Checksum()

Creates a new instance of Checksum.

Checksum

public Checksum(ChecksumType cksumtype,
                byte[] checksum)

Creates a new instance of Checksum.

Parameters:

cksumtype - The checksum type used

checksum - The checksum value

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(Object)

getChecksumValue

public byte[] getChecksumValue()

Returns the checksum value.

Returns:

The checksum value.

setChecksumValue

public void setChecksumValue(byte[] checksum)

Set the checksum Value.

Parameters:

checksum - The checksum value

getChecksumType

public ChecksumType getChecksumType()

Returns the ChecksumType.

Returns:

The ChecksumType.

setChecksumType

public void setChecksumType(ChecksumType cksumType)

Set the ChecksumType.

Parameters:

cksumType - The checksum algorithm used

computeLength

public int computeLength()

Compute the checksum length

 Checksum :
 
 0x30 L1 checksum sequence
  |
  +--> 0xA0 L2 cksumtype tag
  |     |
  |     +--> 0x02 L2-1 cksumtype (int)
  |
  +--> 0xA1 L3 checksum tag
        |
        +--> 0x04 L3-1 checksum (OCTET STRING)
        
  where L1 = L2 + lenght(0xA0) + length(L2) +
             L3 + lenght(0xA1) + length(L3) 
  and
  L2 = L2-1 + length(0x02) + length( L2-1) 
  L3 = L3-1 + length(0x04) + length( L3-1) 
  

Specified by:

computeLength in interface org.apache.directory.api.asn1.Asn1Object

encode

public java.nio.ByteBuffer encode(java.nio.ByteBuffer buffer)
                           throws org.apache.directory.api.asn1.EncoderException

Encode the Checksum message to a PDU.

 Checksum :
 
 0x30 LL
   0xA0 LL 
     0x02 0x01 cksumtype
   0xA1 LL 
     0x04 LL Checksum
 

Specified by:

encode in interface org.apache.directory.api.asn1.Asn1Object

Parameters:

buffer - The buffer where to put the PDU. It should have been allocated before, with the right size.

Returns:

The constructed PDU.

Throws:

org.apache.directory.api.asn1.EncoderException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()

toString

public java.lang.String toString(java.lang.String tabs)

See Also:

Object.toString()