Class MessageDigest

java.lang.Object

java.security.MessageDigest

public final class MessageDigest
extends Object

A message digest over the platform's own, which com.codename1.impl.JdkHost reaches: MD5, SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 in a Codename One application. Any algorithm the platform lacks is a NoSuchAlgorithmException, as it is on a JDK without a provider for it.

There are no providers here: getInstance with a provider argument, getProvider and a subclass of this class are not offered.

Method Summary

Modifier and Type	Method	Description
byte[]	digest()	The digest of everything given so far; the next one starts empty.
byte[]	digest(byte[] input)
String	getAlgorithm()
int	getDigestLength()
static MessageDigest	getInstance(String algorithm)
static boolean	isEqual(byte[] a, byte[] b)	Whether two digests are the same, in a time that does not depend on where they first differ.
void	reset()
String	toString()	Returns a string representation of the object.
void	update(byte input)
void	update(byte[] input)
void	update(byte[] input, int offset, int len)

Methods inherited from class Object

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

Method Details

getInstance

public static MessageDigest getInstance(String algorithm)
                                 throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

update

public void update(byte input)

update

public void update(byte[] input)

update

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

digest

public byte[] digest()

The digest of everything given so far; the next one starts empty.

digest

public byte[] digest(byte[] input)

reset

public void reset()

getAlgorithm

public String getAlgorithm()

getDigestLength

public int getDigestLength()

isEqual

public static boolean isEqual(byte[] a,
 byte[] b)

Whether two digests are the same, in a time that does not depend on where they first differ.

toString

public String toString()

Description copied from class: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method. The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: getClass().getName() + '@' + Integer.toHexString(hashCode())

Overrides:

toString in class Object