cz.d1x.dxcrypto.encryption.crypto

Class AsymmetricAlgorithmBuilder

java.lang.Object

cz.d1x.dxcrypto.encryption.crypto.AsymmetricAlgorithmBuilder

All Implemented Interfaces:

EncryptionAlgorithmBuilder

Direct Known Subclasses:

RSABuilder

public abstract class AsymmetricAlgorithmBuilder
extends Object
implements EncryptionAlgorithmBuilder

Base builder for asymmetric key algorithms.

Author:

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

See Also:

AsymmetricAlgorithm

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AsymmetricAlgorithmBuilder()

Method Summary

Modifier and Type	Method and Description
EncryptionAlgorithm	build() Builds a new instance of encryption algorithm.
AsymmetricAlgorithmBuilder	encoding(String encoding) Sets encoding for strings in input and output.
protected abstract String	getAlgorithm() Gets a name of algorithm supported by crypto.
AsymmetricAlgorithmBuilder	keyPair(KeyPair keyPair) Sets both public and private key for both encryption and decryption.
AsymmetricAlgorithmBuilder	privateKey(BigInteger modulus, BigInteger exponent) Sets private key for decryption of messages.
AsymmetricAlgorithmBuilder	privateKey(CryptoKeyFactory privateKeyFactory) Sets custom factory of private key for decryption of messages.
AsymmetricAlgorithmBuilder	publicKey(BigInteger modulus, BigInteger exponent) Sets public key for encryption of messages.
AsymmetricAlgorithmBuilder	publicKey(CryptoKeyFactory 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

AsymmetricAlgorithmBuilder

protected AsymmetricAlgorithmBuilder()

Method Detail

getAlgorithm

protected abstract String getAlgorithm()

Gets a name of algorithm supported by crypto.

Returns:

algorithm name

publicKey

public AsymmetricAlgorithmBuilder 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 AsymmetricAlgorithmBuilder publicKey(CryptoKeyFactory publicKeyFactory)

Sets custom factory of public key for encryption of messages.

Parameters:

publicKeyFactory - factory of public key

Returns:

this instance

privateKey

public AsymmetricAlgorithmBuilder 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

privateKey

public AsymmetricAlgorithmBuilder privateKey(CryptoKeyFactory privateKeyFactory)

Sets custom factory of private key for decryption of messages.

Parameters:

privateKeyFactory - factory of private key

Returns:

this instance

keyPair

public AsymmetricAlgorithmBuilder keyPair(KeyPair keyPair)

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

Parameters:

keyPair - key pair

Returns:

this instance

encoding

public AsymmetricAlgorithmBuilder encoding(String encoding)

Sets encoding for strings in input and output.

Parameters:

encoding - encoding to be set

Returns:

this instance

build

public EncryptionAlgorithm build()
                          throws EncryptionException

Description copied from interface: EncryptionAlgorithmBuilder

Builds a new instance of encryption algorithm.

Specified by:

build in interface EncryptionAlgorithmBuilder

Returns:

algorithm instance

Throws:

EncryptionException - possible exception when encryption algorithm cannot be built