cz.d1x.dxcrypto.encryption

Class AsymmetricCryptoAlgorithmBuilder

java.lang.Object

cz.d1x.dxcrypto.encryption.AsymmetricCryptoAlgorithmBuilder

public final class AsymmetricCryptoAlgorithmBuilder
extends Object

Base builder for asymmetric key algorithms based on AsymmetricCryptoAlgorithm.

Author:

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

See Also:

AsymmetricCryptoAlgorithm

Constructor Summary

Constructors

Constructor and Description
AsymmetricCryptoAlgorithmBuilder(String algorithmName) Creates a new builder.

Method Summary

Modifier and Type	Method and Description
EncryptionAlgorithm	build() Builds a new instance of encryption algorithm.
AsymmetricCryptoAlgorithmBuilder	bytesRepresentation(BytesRepresentation bytesRepresentation) Sets how byte arrays will be represented in strings.
AsymmetricCryptoAlgorithmBuilder	encoding(String encoding) Sets encoding for strings in input and output.
AsymmetricCryptoAlgorithmBuilder	keyPair(KeyPair keyPair) Sets both public and private key for both encryption and decryption.
AsymmetricCryptoAlgorithmBuilder	privateKey(BigInteger modulus, BigInteger exponent) Sets private key for decryption of messages.
AsymmetricCryptoAlgorithmBuilder	privateKey(KeyFactory<Key> privateKeyFactory) Sets custom factory of private key for decryption of messages.
AsymmetricCryptoAlgorithmBuilder	publicKey(BigInteger modulus, BigInteger exponent) Sets public key for encryption of messages.
AsymmetricCryptoAlgorithmBuilder	publicKey(KeyFactory<Key> publicKeyFactory) Sets custom factory of 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

AsymmetricCryptoAlgorithmBuilder

public AsymmetricCryptoAlgorithmBuilder(String algorithmName)

Creates a new builder.

Parameters:

algorithmName - full algorithm name (used for Cipher initialization)

Method Detail

publicKey

public AsymmetricCryptoAlgorithmBuilder 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

publicKey

public AsymmetricCryptoAlgorithmBuilder publicKey(KeyFactory<Key> publicKeyFactory)

Sets custom factory of public key for encryption of messages.

Parameters:

publicKeyFactory - factory of public key

Returns:

this instance

privateKey

public AsymmetricCryptoAlgorithmBuilder 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

privateKey

public AsymmetricCryptoAlgorithmBuilder privateKey(KeyFactory<Key> privateKeyFactory)

Sets custom factory of private key for decryption of messages.

Parameters:

privateKeyFactory - factory of private key

Returns:

this instance

Throws:

IllegalArgumentException - exception if passed factory is null

keyPair

public AsymmetricCryptoAlgorithmBuilder keyPair(KeyPair keyPair)

Sets both public and private key for both encryption and decryption.

Parameters:

keyPair - key pair

Returns:

this instance

Throws:

IllegalArgumentException - exception if passed key pair is null

bytesRepresentation

public AsymmetricCryptoAlgorithmBuilder 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 AsymmetricCryptoAlgorithmBuilder 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