Package org.bouncycastle

Class CachingBcPublicKeyDataDecryptorFactory

java.lang.Object

org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory

org.bouncycastle.CachingBcPublicKeyDataDecryptorFactory

All Implemented Interfaces:

org.bouncycastle.openpgp.operator.PGPDataDecryptorFactory, org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory, CustomPublicKeyDataDecryptorFactory

public class CachingBcPublicKeyDataDecryptorFactory
extends org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory
implements CustomPublicKeyDataDecryptorFactory

Implementation of the PublicKeyDataDecryptorFactory which caches decrypted session keys. That way, if a message needs to be decrypted multiple times, expensive private key operations can be omitted. This implementation changes the behavior or recoverSessionData(int, byte[][]) to first return any cache hits. If no hit is found, the method call is delegated to the underlying PublicKeyDataDecryptorFactory. The result of that is then placed in the cache and returned.

Constructor Summary

Constructors

Constructor	Description
CachingBcPublicKeyDataDecryptorFactory(org.bouncycastle.openpgp.PGPPrivateKey privateKey, SubkeyIdentifier decryptionKey)

Method Summary

Modifier and Type	Method	Description
void	clear()
byte[]	costlyRecoverSessionData(int keyAlgorithm, byte[][] secKeyData)
SubkeyIdentifier	getSubkeyIdentifier()	Return the SubkeyIdentifier for which this particular CustomPublicKeyDataDecryptorFactory is intended.
byte[]	recoverSessionData(int keyAlgorithm, byte[][] secKeyData)

Methods inherited from class org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory

createDataDecryptor, createDataDecryptor, createDataDecryptor

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bouncycastle.openpgp.operator.PGPDataDecryptorFactory

createDataDecryptor, createDataDecryptor, createDataDecryptor

Constructor Detail

CachingBcPublicKeyDataDecryptorFactory

public CachingBcPublicKeyDataDecryptorFactory(org.bouncycastle.openpgp.PGPPrivateKey privateKey,
                                              SubkeyIdentifier decryptionKey)

Method Detail

recoverSessionData

public byte[] recoverSessionData(int keyAlgorithm,
                                 byte[][] secKeyData)
                          throws org.bouncycastle.openpgp.PGPException

Specified by:

recoverSessionData in interface org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory

Overrides:

recoverSessionData in class org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory

Throws:

org.bouncycastle.openpgp.PGPException

costlyRecoverSessionData

public byte[] costlyRecoverSessionData(int keyAlgorithm,
                                       byte[][] secKeyData)
                                throws org.bouncycastle.openpgp.PGPException

Throws:

org.bouncycastle.openpgp.PGPException

clear

public void clear()

getSubkeyIdentifier

public SubkeyIdentifier getSubkeyIdentifier()

Description copied from interface: CustomPublicKeyDataDecryptorFactory

Return the SubkeyIdentifier for which this particular CustomPublicKeyDataDecryptorFactory is intended.

Specified by:

getSubkeyIdentifier in interface CustomPublicKeyDataDecryptorFactory

Returns:

subkey identifier