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
 Category: Signed NullDigest()
          This constructor is not used.
 
Method Summary
 Category: Signed  String getAlgorithm()
          Returns the name of this digest, "Null" in this case.
 Category: Signed  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.
 Category: Signed  int getDigestLength()
          Returns zero (0), since this is a null digest with a length of zero.
 Category: Signed  void reset()
          Reinitializes the digest.
 Category: Signed  void update(byte[] data, int offset, int length)
          Passes a byte array of data, specified by the length and offset, into the hash algorithm.
 Category: Signed  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.
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.
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.

Since:
JDE 4.0.2
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.

Since:
JDE 4.0.2
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.

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.

Parameters:
buffer - Ignored.
offset - Ignored.
resetDigest - Ignored.

Returns:
An integer with the value Zero (0).
Since:
JDE 4.0.2
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.


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