org.bouncycastle.openpgp.operator.bc
Class BcPGPDataEncryptorBuilder

java.lang.Object
  org.bouncycastle.openpgp.operator.bc.BcPGPDataEncryptorBuilder

All Implemented Interfaces:

PGPDataEncryptorBuilder

public class BcPGPDataEncryptorBuilder

extends java.lang.Object

implements PGPDataEncryptorBuilder

PGPDataEncryptorBuilder implementation that uses the Bouncy Castle lightweight API to implement cryptographic primitives.

Constructor Summary

BcPGPDataEncryptorBuilder(int encAlgorithm)
Constructs a new data encryptor builder for a specified cipher type.

Method Summary

PGPDataEncryptor	build(byte[] keyBytes) Builds a data encryptor using the algorithm configured for this builder.
int	getAeadAlgorithm()
int	getAlgorithm() The encryption algorithm used by data encryptors created by this builder.
int	getChunkSize()
java.security.SecureRandom	getSecureRandom() Gets the SecureRandom instance used by this builder.
boolean	isV5StyleAEAD()
BcPGPDataEncryptorBuilder	setSecureRandom(java.security.SecureRandom random) Provide a user defined source of randomness.
PGPDataEncryptorBuilder	setUseV5AEAD() Specify we are using V5 AEAD.
PGPDataEncryptorBuilder	setUseV6AEAD() Specify we are using V6 AEAD.
PGPDataEncryptorBuilder	setWithAEAD(int aeadAlgorithm, int chunkSize) Sets whether the resulting encrypted data will be protected using an AEAD mode.
PGPDataEncryptorBuilder	setWithIntegrityPacket(boolean withIntegrityPacket) Sets whether the resulting encrypted data will be protected using an integrity packet.

Methods inherited from class java.lang.Object

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

Constructor Detail

BcPGPDataEncryptorBuilder

public BcPGPDataEncryptorBuilder(int encAlgorithm)

Constructs a new data encryptor builder for a specified cipher type.

Parameters:

encAlgorithm - one of the supported symmetric cipher algorithms. May not be SymmetricKeyAlgorithmTags.NULL.

Method Detail

setWithIntegrityPacket

public PGPDataEncryptorBuilder setWithIntegrityPacket(boolean withIntegrityPacket)

Sets whether the resulting encrypted data will be protected using an integrity packet.

Specified by:

setWithIntegrityPacket in interface PGPDataEncryptorBuilder

Parameters:

withIntegrityPacket - true if an integrity packet is to be included, false otherwise.

Returns:

the current builder.

setUseV5AEAD

public PGPDataEncryptorBuilder setUseV5AEAD()

Description copied from interface: PGPDataEncryptorBuilder

Specify we are using V5 AEAD.

Specified by:

setUseV5AEAD in interface PGPDataEncryptorBuilder

Returns:

the current builder

setUseV6AEAD

public PGPDataEncryptorBuilder setUseV6AEAD()

Description copied from interface: PGPDataEncryptorBuilder

Specify we are using V6 AEAD.

Specified by:

setUseV6AEAD in interface PGPDataEncryptorBuilder

Returns:

the current builder

setWithAEAD

public PGPDataEncryptorBuilder setWithAEAD(int aeadAlgorithm,
                                           int chunkSize)

Sets whether the resulting encrypted data will be protected using an AEAD mode. The chunkSize is used as a power of two, result in blocks (1 << chunkSize) containing data with an extra 16 bytes for the tag. The minimum chunkSize is 6.

Specified by:

setWithAEAD in interface PGPDataEncryptorBuilder

Parameters:

aeadAlgorithm - the AEAD mode to use.

chunkSize - the size of the chunks to be processed with each nonce.

Returns:

builder

setSecureRandom

public BcPGPDataEncryptorBuilder setSecureRandom(java.security.SecureRandom random)

Provide a user defined source of randomness.

If no SecureRandom is configured, a default SecureRandom will be used.

Parameters:

random - the secure random to be used.

Returns:

the current builder.

getAlgorithm

public int getAlgorithm()

Description copied from interface: PGPDataEncryptorBuilder

The encryption algorithm used by data encryptors created by this builder.

Specified by:

getAlgorithm in interface PGPDataEncryptorBuilder

Returns:

one of the symmetric encryption algorithms.

getAeadAlgorithm

public int getAeadAlgorithm()

Specified by:

getAeadAlgorithm in interface PGPDataEncryptorBuilder

getChunkSize

public int getChunkSize()

Specified by:

getChunkSize in interface PGPDataEncryptorBuilder

isV5StyleAEAD

public boolean isV5StyleAEAD()

Specified by:

isV5StyleAEAD in interface PGPDataEncryptorBuilder

getSecureRandom

public java.security.SecureRandom getSecureRandom()

Description copied from interface: PGPDataEncryptorBuilder

Gets the SecureRandom instance used by this builder.

If a SecureRandom has not been explicitly configured, a default SecureRandom is constructed and retained by the this builder.

Specified by:

getSecureRandom in interface PGPDataEncryptorBuilder

build

public PGPDataEncryptor build(byte[] keyBytes)
                       throws PGPException

Description copied from interface: PGPDataEncryptorBuilder

Builds a data encryptor using the algorithm configured for this builder.

Specified by:

build in interface PGPDataEncryptorBuilder

Parameters:

keyBytes - the bytes of the key to use for the cipher.

Returns:

a data encryptor with an initialised cipher.

Throws:

PGPException - if an error occurs initialising the configured encryption.