Package org.refcodes.forwardsecrecy

Class PublicKeyDecryptionService

java.lang.Object

org.refcodes.forwardsecrecy.AbstractDecryptionService

org.refcodes.forwardsecrecy.PublicKeyDecryptionService

All Implemented Interfaces:

DecryptionService

public class PublicKeyDecryptionService
extends AbstractDecryptionService

The DecryptionService retrieves CipherVersion instances from the DecryptionServer and is decrypting the ciphers contained in the CipherVersion instances with a private key.

Constructor Summary

Constructors

Constructor	Description
PublicKeyDecryptionService(String aNamespece, String aPrivateKeyPath, String aPrivateKeyPassPhrase, DecryptionServer aDecryptionServer)	Constructs the service with the required services and configuration.
PublicKeyDecryptionService(String aNamespece, String aPrivateKeyPath, String aPrivateKeyPassPhrase, DecryptionServer aDecryptionServer, CipherVersionFactory<CipherVersion> aCipherVersionFactory)	Constructs the service with the required services and configuration.
PublicKeyDecryptionService(String aNamespece, String aPrivateKeyPath, DecryptionServer aDecryptionServer)	Constructs the service with the required services and configuration.
PublicKeyDecryptionService(String aNamespece, String aPrivateKeyPath, DecryptionServer aDecryptionServer, CipherVersionFactory<CipherVersion> aCipherVersionFactory)	Constructs the service with the required services and configuration.

Method Summary

Modifier and Type	Method	Description
protected String	createMessage()	Creates a message for which a signature is to be created in order to authenticate for the retrieval of the cipher versions.
protected <CV extends CipherVersion> CV	toDecryptedCipherVersion(CV aEncyrptedCipherVersion)	To decrypted cipher version.
protected String	toSignature(String aMessage)	Creates a signature for the given message.

Methods inherited from class org.refcodes.forwardsecrecy.AbstractDecryptionService

getCipherVersions, setCipherVersionsExpireTimeInMs

Methods inherited from class java.lang.Object

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

Constructor Detail

PublicKeyDecryptionService

public PublicKeyDecryptionService(String aNamespece,
                                  String aPrivateKeyPath,
                                  DecryptionServer aDecryptionServer,
                                  CipherVersionFactory<CipherVersion> aCipherVersionFactory)
                           throws edu.vt.middleware.crypt.CryptException,
                                  IOException,
                                  InvalidKeySpecException,
                                  NoSuchAlgorithmException

Constructs the service with the required services and configuration.

Parameters:

aPrivateKeyPath - The path on the file system to the private key to be used for decrypting any ciphers passed by the decryption server in CipherVersions retrieved from a storage.

aDecryptionServer - The decryption server for accessing the cipher versions

aCipherVersionFactory - The factory to be used for creating CipherVersion instances.

Throws:

IOException - in case of I/O problems

edu.vt.middleware.crypt.CryptException - in case the cryptography algorithm had problems.

NoSuchAlgorithmException - thrown in case the cryptographic algorithm was not found.

InvalidKeySpecException - thrown in case an invalid key spec has been encountered.

PublicKeyDecryptionService

public PublicKeyDecryptionService(String aNamespece,
                                  String aPrivateKeyPath,
                                  DecryptionServer aDecryptionServer)
                           throws edu.vt.middleware.crypt.CryptException,
                                  IOException,
                                  InvalidKeySpecException,
                                  NoSuchAlgorithmException

Constructs the service with the required services and configuration.

Parameters:

aPrivateKeyPath - The path on the file system to the private key to be used for decrypting any ciphers passed by the decryption server in CipherVersions retrieved from a storage.

aDecryptionServer - The decryption server for accessing the cipher versions

Throws:

IOException - in case of I/O problems

edu.vt.middleware.crypt.CryptException - in case the cryptography algorithm had problems.

NoSuchAlgorithmException - thrown in case the cryptographic algorithm was not found.

InvalidKeySpecException - thrown in case an invalid key spec has been encountered.

PublicKeyDecryptionService

public PublicKeyDecryptionService(String aNamespece,
                                  String aPrivateKeyPath,
                                  String aPrivateKeyPassPhrase,
                                  DecryptionServer aDecryptionServer)
                           throws edu.vt.middleware.crypt.CryptException,
                                  IOException,
                                  InvalidKeySpecException,
                                  NoSuchAlgorithmException

Constructs the service with the required services and configuration.

Parameters:

aPrivateKeyPath - The path on the file system to the private key to be used for decrypting any ciphers passed by the decryption server in CipherVersions retrieved from a storage.

aPrivateKeyPassPhrase - The pass phrase for decrypting the private key.

aDecryptionServer - The decryption server for accessing the cipher versions

Throws:

IOException - in case of I/O problems

edu.vt.middleware.crypt.CryptException - in case the cryptography algorithm had problems.

NoSuchAlgorithmException - thrown in case the cryptographic algorithm was not found.

InvalidKeySpecException - thrown in case an invalid key spec has been encountered.

PublicKeyDecryptionService

public PublicKeyDecryptionService(String aNamespece,
                                  String aPrivateKeyPath,
                                  String aPrivateKeyPassPhrase,
                                  DecryptionServer aDecryptionServer,
                                  CipherVersionFactory<CipherVersion> aCipherVersionFactory)
                           throws edu.vt.middleware.crypt.CryptException,
                                  IOException,
                                  InvalidKeySpecException,
                                  NoSuchAlgorithmException

Constructs the service with the required services and configuration.

Parameters:

aPrivateKeyPath - The path on the file system to the private key to be used for decrypting any ciphers passed by the decryption server in CipherVersions retrieved from a storage.

aPrivateKeyPassPhrase - The pass phrase for decrypting the private key.

aDecryptionServer - The decryption server for accessing the cipher versions

aCipherVersionFactory - The factory to be used for creating CipherVersion instances.

Throws:

IOException - in case of I/O problems

edu.vt.middleware.crypt.CryptException - in case the cryptography algorithm had problems.

NoSuchAlgorithmException - thrown in case the cryptographic algorithm was not found.

InvalidKeySpecException - thrown in case an invalid key spec has been encountered.

Method Detail

toSignature

protected String toSignature(String aMessage)

Creates a signature for the given message.

Specified by:

toSignature in class AbstractDecryptionService

Parameters:

aMessage - The message for which a signature is to be generated

Returns:

The signature for the message

createMessage

protected String createMessage()

Creates a message for which a signature is to be created in order to authenticate for the retrieval of the cipher versions. A decryption server should deny any requests to get cipher versions in case the same message is used twice.

Specified by:

createMessage in class AbstractDecryptionService

Returns:

The message

toDecryptedCipherVersion

protected <CV extends CipherVersion> CV toDecryptedCipherVersion(CV aEncyrptedCipherVersion)

To decrypted cipher version.

Specified by:

toDecryptedCipherVersion in class AbstractDecryptionService

Type Parameters:

CV - the generic type

Parameters:

aEncyrptedCipherVersion - the encyrpted cipher version

Returns:

the cv