Package com.identity4j.util.crypt.impl

Class MessageDigestStringEncoder

java.lang.Object

com.identity4j.util.crypt.impl.AbstractEncoder

com.identity4j.util.crypt.impl.CompoundEncoder

com.identity4j.util.crypt.impl.MessageDigestStringEncoder

All Implemented Interfaces:

Encoder

Direct Known Subclasses:

MD5StringEncoder, SHAStringEncoder

public class MessageDigestStringEncoder
extends CompoundEncoder

Constructor Summary

Constructors

Constructor	Description
MessageDigestStringEncoder(String id, String encryptionEncoderId, String hashAlgorithm)

Method Summary

Modifier and Type	Method	Description
byte[]	encode(byte[] toEncode, byte[] salt, byte[] passphrase, String charset)	Encode a string
boolean	isOfType(byte[] encodedBytes, String charset)	Determine if this encoder may have been used to create the provided encoded bytes.
boolean	match(byte[] encodedData, byte[] unencodedData, byte[] passphrase, String charset)	Check if the provide un-encoded data would match the encoded data if it was encoded.

Methods inherited from class com.identity4j.util.crypt.impl.CompoundEncoder

addEncoder, decode

Methods inherited from class com.identity4j.util.crypt.impl.AbstractEncoder

getId, randomBytes

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigestStringEncoder

public MessageDigestStringEncoder(String id,
                                  String encryptionEncoderId,
                                  String hashAlgorithm)

Method Detail

encode

public byte[] encode(byte[] toEncode,
                     byte[] salt,
                     byte[] passphrase,
                     String charset)
              throws EncoderException

Description copied from interface: Encoder

Encode a string

Specified by:

encode in interface Encoder

Overrides:

encode in class CompoundEncoder

Parameters:

toEncode - data to encode

salt - salt if supported

passphrase - passphrase if supported

charset - character set

Returns:

encoded bytes

Throws:

EncoderException - if encoding fails

match

public boolean match(byte[] encodedData,
                     byte[] unencodedData,
                     byte[] passphrase,
                     String charset)

Description copied from interface: Encoder

Check if the provide un-encoded data would match the encoded data if it was encoded.

Specified by:

match in interface Encoder

Overrides:

match in class CompoundEncoder

Parameters:

encodedData - encoded data

unencodedData - un-encoded data

passphrase - passphrase if supported

charset - character set

Returns:

matches

isOfType

public boolean isOfType(byte[] encodedBytes,
                        String charset)

Description copied from interface: Encoder

Determine if this encoder may have been used to create the provided encoded bytes. This method should only be used if it is very likely to be the right encoder.

Specified by:

isOfType in interface Encoder

Overrides:

isOfType in class CompoundEncoder

Parameters:

encodedBytes - encoded bytes

charset - character set

Returns:

this almost certainly was encoded with a similar encoder