totalcross.crypto.digest

Class Digest

java.lang.Object

totalcross.crypto.digest.Digest

Direct Known Subclasses:

MD5Digest, SHA1Digest, SHA256Digest

public abstract class Digest
extends java.lang.Object

This class provides the functionality of a message digest algorithm.

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteArrayStream	input

Constructor Summary

Constructors

Constructor and Description
Digest()

Method Summary

Modifier and Type	Method and Description
abstract java.lang.String	getAlgorithm() Returns the name of the algorithm.
abstract int	getBlockLength() Returns the block length.
byte[]	getDigest() Finalizes the message digest operation by processing all the accumulated input data and returning the result in a new buffer.
abstract int	getDigestLength() Returns the message digest length.
protected abstract byte[]	process(byte[] data)
void	reset() Initializes this message digest.
java.lang.String	toString() Returns the name of the algorithm.
void	update(byte[] data) Updates the input data that will be processed by this message digest algorithm.
void	update(byte[] data, int start, int count) Updates the input data that will be processed by this message digest algorithm.
void	update(int data) Updates the input data that will be processed by this message digest algorithm.

Methods inherited from class java.lang.Object

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

Field Detail

input

protected ByteArrayStream input

Constructor Detail

Digest

public Digest()

Method Detail

toString

public java.lang.String toString()

Returns the name of the algorithm.

Overrides:

toString in class java.lang.Object

Returns:

The name of the algorithm whose class heirs from Digest.

getAlgorithm

public abstract java.lang.String getAlgorithm()

Returns the name of the algorithm.

Returns:

The name of the algorithm whose class heirs from Digest.

getBlockLength

public abstract int getBlockLength()

Returns the block length.

Returns:

The block length (in bytes).

getDigestLength

public abstract int getDigestLength()

Returns the message digest length.

Returns:

The message digest length (in bytes).

reset

public final void reset()

Initializes this message digest. Calling this method will also reset the input data buffer.

update

public final void update(int data)

Updates the input data that will be processed by this message digest algorithm. The data will be accumulated in an input buffer to be processed when getDigest() is finally called.

Parameters:

data - The input data.

update

public final void update(byte[] data)

Updates the input data that will be processed by this message digest algorithm. The data will be accumulated in an input buffer to be processed when getDigest() is finally called.

Parameters:

data - The input data.

update

public final void update(byte[] data,
                         int start,
                         int count)

Updates the input data that will be processed by this message digest algorithm. The data will be accumulated in an input buffer to be processed when getDigest() is finally called.

Parameters:

data - The input data.

start - The offset in data where the data starts.

count - The input length.

getDigest

public final byte[] getDigest()

Finalizes the message digest operation by processing all the accumulated input data and returning the result in a new buffer.

Returns:

The operation result in a new buffer.

process

protected abstract byte[] process(byte[] data)