SHOW Signed

net.rim.device.api.crypto
Class MD5Digest

java.lang.Object
  |
  +--net.rim.device.api.crypto.AbstractDigest
        |
        +--net.rim.device.api.crypto.MD5Digest

All Implemented Interfaces:

Digest

public final class MD5Digest

extends AbstractDigest

implements Digest

The MD5Digest class implements the Message Digest 5 (MD5) hash algorithm.

For a code sample using the MD5 digest, click here.

MD5 is defined in RFC 1321.

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:

MD4Digest, MD2Digest

Field Summary

	static int	BLOCK_LENGTH A static definition stating the block length of 64 bytes.
	static int	DIGEST_LENGTH Specifies the size of the digest in terms of the number of bytes returned by the getDigest function, namely 16 bytes.

Constructor Summary

MD5Digest() Constructs and initializes an MD5Digest object.

Method Summary

	String	getAlgorithm() Returns the name of this digest ("MD5").
	int	getBlockLength() Returns the block length of the digest in bytes.
	int	getDigest(byte[] buffer, int offset, boolean resetDigest) Inserts the digest of all the input data since the last reset into the specified buffer at the given offset.
	int	getDigestLength() Returns the length of the digest in bytes.
	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

getDigest, getDigest, getDigest, update

Field Detail

DIGEST_LENGTH

public static final int DIGEST_LENGTH

Specifies the size of the digest in terms of the number of bytes returned by the getDigest function, namely 16 bytes.

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.

BLOCK_LENGTH

public static final int BLOCK_LENGTH

A static definition stating the block length of 64 bytes.

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.

Constructor Detail

MD5Digest

public MD5Digest()

Constructs and initializes an MD5Digest object.

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 ("MD5").

This method will always return the String "MD5".

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()

Description copied from interface: Digest

Returns the length of the digest in bytes.

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.

getBlockLength

public int getBlockLength()

Description copied from interface: Digest

Returns the block length of the digest in bytes.

Most digest algorithms are iterated hash functions, and thus process the input data in blocks. Some primitives, like HMAC are sensitive to this block length.

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)

Description copied from interface: Digest

Inserts the digest of all the input data since the last reset into the specified buffer at the given offset.

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.