SHOW Signed

net.rim.device.api.crypto
Class NullDigest

java.lang.Object
  |
  +--net.rim.device.api.crypto.AbstractDigest
        |
        +--net.rim.device.api.crypto.NullDigest

All Implemented Interfaces:

Digest

public final class NullDigest

extends AbstractDigest

implements Digest

Allows for a user to provide a digest with no functionality to a function that requires a digest. It is provided for instances when no digest is required initially and further in the protocol or application a new digest is required. The methods in this class do not perform any operations.

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

Since:

JDE 3.6.0

See Also:

NullEncryptor, NullDecryptor

Constructor Summary

NullDigest() This constructor is not used.

Method Summary

	String	getAlgorithm() Returns the name of this digest, "Null" in this case.
	int	getDigest(byte[] buffer, int offset, boolean resetDigest) Returns zero (0) specifying that no information was hashed and that there is no information to return from the null digest.
	int	getDigestLength() Returns zero (0), since this is a null digest with a length of zero.
	void	reset() Reinitializes the digest.
	void	update(byte[] data, int offset, int length) Passes a byte array of data, specified by the length and offset, into the hash algorithm.
	void	update(int data) Passes a single byte into the hash algorithm.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.rim.device.api.crypto.Digest

getBlockLength, getDigest, getDigest, getDigest, update

Constructor Detail

NullDigest

public NullDigest()

This constructor is not used.

Since:

JDE 3.6.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

Method Detail

getAlgorithm

public String getAlgorithm()

Returns the name of this digest, "Null" in this case.

Specified by:

getAlgorithm in interface Digest

Overrides:

getAlgorithm in class AbstractDigest

Since:

JDE 3.6.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

reset

public void reset()

Description copied from interface: Digest

Reinitializes the digest.

Specified by:

reset in interface Digest

Overrides:

reset in class AbstractDigest

Since:

JDE 3.6.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

update

public void update(int data)

Description copied from interface: Digest

Passes a single byte into the hash algorithm.

Specified by:

update in interface Digest

Overrides:

update in class AbstractDigest

Since:

JDE 4.0.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

update

public void update(byte[] data,
                   int offset,
                   int length)

Description copied from interface: Digest

Passes a byte array of data, specified by the length and offset, into the hash algorithm.

Specified by:

update in interface Digest

Overrides:

update in class AbstractDigest

Since:

JDE 4.0.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

getDigestLength

public int getDigestLength()

Returns zero (0), since this is a null digest with a length of zero.

Specified by:

getDigestLength in interface Digest

Overrides:

getDigestLength in class AbstractDigest

Returns:

An integer that represents the length of the digest.

Since:

JDE 3.6.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.

getDigest

public int getDigest(byte[] buffer,
                     int offset,
                     boolean resetDigest)

Returns zero (0) specifying that no information was hashed and that there is no information to return from the null digest.

Specified by:

getDigest in interface Digest

Overrides:

getDigest in class AbstractDigest

Parameters:

buffer - Ignored.

offset - Ignored.

resetDigest - Ignored.

Returns:

An integer with the value Zero (0).

Since:

JDE 4.0.0

Category:

Signed: This element is only accessible by signed clients. If you intend to use this element, please contact RIM to establish the necessary agreements that will allow you to have your COD files signed. Signing is only required for use on the device, development under the JDE can occur without signing the CODs.