cz.d1x.dxcrypto.encryption

Class RSAAlgorithmBuilder

java.lang.Object

cz.d1x.dxcrypto.encryption.RSAAlgorithmBuilder

public final class RSAAlgorithmBuilder
extends Object

Base builder for asymmetric key algorithms based on GenericEncryptionAlgorithm.

Author:

Zdenek Obst, zdenek.obst-at-gmail.com

See Also:

GenericEncryptionAlgorithm

Constructor Summary

Constructors

Constructor and Description
RSAAlgorithmBuilder(AsymmetricEncryptionEngineFactory<RSAKeyParams,RSAKeyParams> engineFactory) Creates a new builder.

Method Summary

Modifier and Type	Method and Description
EncryptionAlgorithm	build() Builds a new instance of encryption algorithm.
RSAAlgorithmBuilder	bytesRepresentation(BytesRepresentation bytesRepresentation) Sets how byte arrays will be represented in strings.
RSAAlgorithmBuilder	encoding(String encoding) Sets encoding for strings in input and output.
RSAAlgorithmBuilder	engineFactory(AsymmetricEncryptionEngineFactory<RSAKeyParams,RSAKeyParams> engineFactory) Sets factory for encryption engine.
RSAAlgorithmBuilder	privateKey(BigInteger modulus, BigInteger exponent) Sets private key for decryption of messages.
RSAAlgorithmBuilder	publicKey(BigInteger modulus, BigInteger exponent) Sets public key for encryption of messages.

Methods inherited from class java.lang.Object

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

Constructor Detail

RSAAlgorithmBuilder

public RSAAlgorithmBuilder(AsymmetricEncryptionEngineFactory<RSAKeyParams,RSAKeyParams> engineFactory)

Creates a new builder.

Parameters:

engineFactory - factory for encryption engine

Method Detail

engineFactory

public RSAAlgorithmBuilder engineFactory(AsymmetricEncryptionEngineFactory<RSAKeyParams,RSAKeyParams> engineFactory)
                                  throws IllegalArgumentException

Sets factory for encryption engine.

Parameters:

engineFactory - factory for encryption engine

Returns:

this instance

Throws:

IllegalArgumentException - exception if passed factory is null

publicKey

public RSAAlgorithmBuilder publicKey(BigInteger modulus,
                                     BigInteger exponent)

Sets public key for encryption of messages.

Parameters:

modulus - modulus of key

exponent - exponent of public key

Returns:

this instance

privateKey

public RSAAlgorithmBuilder privateKey(BigInteger modulus,
                                      BigInteger exponent)

Sets private key for decryption of messages.

Parameters:

modulus - modulus of key

exponent - exponent of private key

Returns:

this instance

Throws:

IllegalArgumentException - exception if passed modulus or exponent is null

bytesRepresentation

public RSAAlgorithmBuilder bytesRepresentation(BytesRepresentation bytesRepresentation)

Sets how byte arrays will be represented in strings. By default HexRepresentation is used.

Parameters:

bytesRepresentation - byte array representation strategy

Returns:

this instance

Throws:

IllegalArgumentException - exception if passed BytesRepresentation is null

encoding

public RSAAlgorithmBuilder encoding(String encoding)

Sets encoding for strings in input and output.

Parameters:

encoding - encoding to be set

Returns:

this instance

Throws:

IllegalArgumentException - exception if given encoding is null or not supported

build

public EncryptionAlgorithm build()
                          throws IllegalArgumentException

Builds a new instance of encryption algorithm.

Returns:

algorithm instance

Throws:

EncryptionException - possible exception when encryption algorithm cannot be built

IllegalArgumentException