de.flexiprovider.api
Class MessageDigest

java.lang.Object
  |
  +--java.security.MessageDigestSpi
        |
        +--de.flexiprovider.api.MessageDigest

Direct Known Subclasses:

DHA256, FORK256, MDFamilyDigest, MessageDigestWrapper, NullDigest, SHA1, SHA224_256, SHA384_512, SWIFFTX224, SWIFFTX256, SWIFFTX384, SWIFFTX512, Tiger, VSH

public abstract class MessageDigest

extends java.security.MessageDigestSpi

Constructor Summary

MessageDigest()

Method Summary

abstract byte[]	digest() Complete the hash computation by performing final operations such as padding.
byte[]	digest(byte[] input) Update the digest and complete the hash computation by performing final operations such as padding.
int	digest(byte[] buf, int offset, int len) Complete the hash computation by performing final operations such as padding.
protected byte[]	engineDigest()
protected int	engineGetDigestLength()
protected void	engineReset()
protected void	engineUpdate(byte input)
protected void	engineUpdate(byte[] input, int offset, int len)
abstract int	getDigestLength()
abstract void	reset() Reset the digest for further use.
abstract void	update(byte input) Update the digest using the specified byte.
void	update(byte[] input) Update the digest using the specified array of bytes, starting at the specified offset.
abstract void	update(byte[] input, int offset, int len) Update the digest using the specified array of bytes, starting at the specified offset.

Methods inherited from class java.security.MessageDigestSpi

clone, engineDigest

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigest

public MessageDigest()

Method Detail

engineGetDigestLength

protected final int engineGetDigestLength()

Overrides:

engineGetDigestLength in class java.security.MessageDigestSpi

engineUpdate

protected final void engineUpdate(byte input)

Overrides:

engineUpdate in class java.security.MessageDigestSpi

engineUpdate

protected final void engineUpdate(byte[] input,
                                  int offset,
                                  int len)

Overrides:

engineUpdate in class java.security.MessageDigestSpi

engineDigest

protected final byte[] engineDigest()

Overrides:

engineDigest in class java.security.MessageDigestSpi

engineReset

protected final void engineReset()

Overrides:

engineReset in class java.security.MessageDigestSpi

getDigestLength

public abstract int getDigestLength()

Returns:

the digest length in bytes

update

public abstract void update(byte input)

Update the digest using the specified byte.

Parameters:

input - the byte to use for the update

update

public final void update(byte[] input)

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

Parameters:

input - the array of bytes to use for the update

update

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

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

Parameters:

input - the array of bytes to use for the update

offset - the offset to start from in the array of bytes

len - the number of bytes to use, starting at offset

digest

public abstract byte[] digest()

Complete the hash computation by performing final operations such as padding. Once digest() has been called, the engine should be reset (see reset()). Resetting is the responsibility of the engine implementor.

Returns:

the array of bytes for the resulting hash value.

digest

public final byte[] digest(byte[] input)

Update the digest and complete the hash computation by performing final operations such as padding. Once digest(byte[]) has been called, the engine should be reset (see reset()). Resetting is the responsibility of the engine implementor.

Parameters:

input - the array of bytes to use for the update

Returns:

the array of bytes for the resulting hash value

digest

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

Complete the hash computation by performing final operations such as padding. Once digest(byte[], int, int) has been called, the engine should be reset (see reset()). Resetting is the responsibility of the engine implementor.

Parameters:

buf - the output buffer in which to store the digest

offset - offset to start from in the output buffer

len - number of bytes within buf allotted for the digest. Both this default implementation and the SUN provider do not return partial digests. The presence of this parameter is solely for consistency in our API's. If the value of this parameter is less than the actual digest length, the method will throw a DigestException. This parameter is ignored if its value is greater than or equal to the actual digest length.

Returns:

the length of the digest stored in the output buffer.

Throws:

DigestException - if an error occurs.

reset

public abstract void reset()

Reset the digest for further use.