org.refcodes.security

Interface Decrypter<DEC,ENC,EXC extends DecryptionException>

public interface Decrypter<DEC,ENC,EXC extends DecryptionException>

Plain interface for providing straight forward decryption functionality as of toDecrypted(Object) and for forcing your plain functionality to provide a bridge to the Java Cryptographic Extension (JCE) framework's CipherSpi as of toDecrypted(byte[], int, int, byte[], int). This way you can use your algorithms outside the JCE framework. This may be necessary when your Java's security settings prevent running your own JCE extensions from inside an (Oracle-) unsigned JAR.

Method Summary

Modifier and Type	Method and Description
int	toDecrypted(byte[] aInput, int aInputOffset, int aInputLength, byte[] aOutput, int aOutputOffset) For compatibility with the java.security framework, especially to be integrated in a sub-class of the CipherSpi.
DEC	toDecrypted(ENC aInput) You pass in data of a given type and you get decrypted data of (another) given type.

Method Detail

toDecrypted

DEC toDecrypted(ENC aInput)
         throws EXC extends DecryptionException

You pass in data of a given type and you get decrypted data of (another) given type.

Parameters:

aInput - The input data to be decrypted.

Returns:

The decrypted output data.

Throws:

EXC - Thrown in case something went wrong upon decryption.

EXC extends DecryptionException

toDecrypted

int toDecrypted(byte[] aInput,
                int aInputOffset,
                int aInputLength,
                byte[] aOutput,
                int aOutputOffset)
         throws ShortBufferException,
                DecryptionException

For compatibility with the java.security framework, especially to be integrated in a sub-class of the CipherSpi.

Parameters:

aInput - The input to be decrypted.

aInputOffset - The offset to start decryption.

aInputLength - The length to be decrypted

aOutput - The output where to decrypt to.

aOutputOffset - The offset where to start writing the decrypted output.

Returns:

The number of bytes decrypted.

Throws:

ShortBufferException - In case you provided lengths and offsets not fitting with the provided arrays.

EncryptionException - Thrown in case a decryption issue occurred regarding the Decrypter. Probably the configuration of your Encrypter does not fit the one of the Decrypter.

DecryptionException