com.theorem.radserver3.radutil
Class MD4Provider

Object
  MessageDigestSpi
      MessageDigest
          MD4Provider

All Implemented Interfaces:

Cloneable

public class MD4Provider

extends MessageDigest

implements Cloneable

Message Digest for MD4, fallback for no MD at all in the PRNG.

Method Summary

Object	clone() Returns a clone if the implementation is cloneable.
byte[]	digest() Completes the hash computation by performing final operations such as padding.
byte[]	digest(byte[] input) Performs a final update on the digest using the specified array of bytes, then completes the digest computation.
int	digest(byte[] input, int offset, int len) Completes the hash computation by performing final operations such as padding.
static MessageDigest	getInstance(String algorithm) Generates a MessageDigest object that implements the specified digest algorithm.
static MessageDigest	getInstance(String algorithm, String provider) Generates a MessageDigest object implementing the specified algorithm, as supplied from the specified provider, if such an algorithm is available from the provider.
static boolean	isEqual(byte[] digesta, byte[] digestb) Compares two digests for equality.
void	reset() Resets the digest for further use.
String	toString() Returns a string representation of this message digest object.
void	update(byte input) Updates the digest using the specified byte.
void	update(byte[] input) Updates the digest using the specified array of bytes
void	update(byte[] input, int offset, int len) Updates the digest using the specified array of bytes, starting at the specified offset.

Methods inherited from class MessageDigest

getAlgorithm, getDigestLength, getInstance, getProvider

Methods inherited from class Object

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

Method Detail

clone

public Object clone()
                       throws CloneNotSupportedException

Returns a clone if the implementation is cloneable. In reality it returns a new instance. Never throws CloneNotSupportedException.

Throws:

CloneNotSupportedException

digest

public byte[] digest()

Completes the hash computation by performing final operations such as padding. The digest is reset after this call is made.

digest

public byte[] digest(byte[] input)

Performs a final update on the digest using the specified array of bytes, then completes the digest computation. That is, this method first calls update(input), passing the input array to the update method, then calls digest().

digest

public int digest(byte[] input,
                  int offset,
                  int len)
           throws DigestException

Completes the hash computation by performing final operations such as padding. The digest is reset after this call is made.

Throws:

DigestException

getInstance

public static MessageDigest getInstance(String algorithm)
                                               throws NoSuchAlgorithmException

Generates a MessageDigest object that implements the specified digest algorithm.

In fact it creates a new MessageDigest.

Throws:

NoSuchAlgorithmException

getInstance

public static MessageDigest getInstance(String algorithm,
                                        String provider)
                                               throws NoSuchAlgorithmException,
                                                      NoSuchProviderException

Generates a MessageDigest object implementing the specified algorithm, as supplied from the specified provider, if such an algorithm is available from the provider.

In fact it creates a new MessageDigest.

Throws:

NoSuchAlgorithmException

NoSuchProviderException

isEqual

public static boolean isEqual(byte[] digesta,
                              byte[] digestb)

Compares two digests for equality. Does a simple byte compare.

reset

public void reset()

Resets the digest for further use.

toString

public String toString()

Returns a string representation of this message digest object.

update

public void update(byte input)

Updates the digest using the specified byte.

update

public void update(byte[] input)

Updates the digest using the specified array of bytes

update

public void update(byte[] input,
                   int offset,
                   int len)

Updates the digest using the specified array of bytes, starting at the specified offset.