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.

For information on cryptographic algorithms, see Crypto Algorithms.

MD5 is defined in RFC 1321.

Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

Since:
JDE 3.6.0
See Also:
MD4Digest, MD2Digest

Field Summary
 Category: Signed static int BLOCK_LENGTH
          A static definition stating the block length of 64 bytes.
 Category: Signed 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
 Category: Signed MD5Digest()
          Constructs and initializes an MD5Digest object.
 
Method Summary
 Category: Signed  String getAlgorithm()
          Returns the name of this digest ("MD5").
 Category: Signed  int getBlockLength()
          Returns the block length of the digest in bytes.
 Category: Signed  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.
 Category: Signed  int getDigestLength()
          Returns the length of the digest in bytes.
 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 net.rim.device.api.crypto.AbstractDigest
getDigest, getDigest, getDigest, update
 
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

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 applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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 applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
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 applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
Method Detail

getAlgorithm

public String getAlgorithm()
Returns the name of this digest ("MD5").

This method will always return the String "MD5".

Specified by:
getAlgorithm in interface Digest
Overrides:
getAlgorithm in class AbstractDigest
Since:
JDE 3.6.0

Following copied from interface: Digest
Returns:
A String representing the name of the digest.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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.

Specified by:
getBlockLength in interface Digest
Overrides:
getBlockLength in class AbstractDigest
Since:
JDE 3.6.0

Following copied from interface: Digest
Returns:
An integer representing the block length.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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.

Specified by:
getDigest in interface Digest
Overrides:
getDigest in class AbstractDigest
Since:
JDE 3.6.0

Following copied from interface: Digest
Parameters:
buffer - The byte array to hold the digest data.
offset - The offset, or initial bit position, to store the data at within the array.
resetDigest - if true, then the digest is reset.
Returns:
An integer representing the number of bytes written to the buffer.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

getDigestLength

public int getDigestLength()
Description copied from interface: Digest
Returns the length of the digest in bytes.

Specified by:
getDigestLength in interface Digest
Overrides:
getDigestLength in class AbstractDigest
Since:
JDE 3.6.0

Following copied from interface: Digest
Returns:
An integer representing the number of bytes.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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 applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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 3.6.0

Following copied from interface: Digest
Parameters:
data - The array containing the input data.
offset - The offset of the input data.
length - The length of the input data.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.

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 3.6.0

Following copied from interface: Digest
Parameters:
data - The byte to be hashed.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.



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