org.linguafranca.pwdb.security

Class Encryption

java.lang.Object

org.linguafranca.pwdb.security.Encryption

public class Encryption
extends Object

Contains the key transform functions and cipher algorithms used in other modules.

Also, some convenience utilities that hide the checked exceptions that would otherwise need to be checked for when using digests.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Encryption.Cipher A list of ciphers that we may apply to the database contents.
static class	Encryption.KeyDerivationFunction A list of functions that we can use to transform keys Enum constants forward to underlying implementation.
static class	Encryption.ProtectedStreamAlgorithm The ordinals represent various types of encryption that may be applied to fields within the unencrypted data

Constructor Summary

Constructors

Constructor and Description
Encryption()

Method Summary

Modifier and Type	Method and Description
static Mac	getHMacSha256Instance(byte[] key) Gets an HMacSha256 Mac
static MessageDigest	getSha256MessageDigestInstance() Gets a SHA-256 message digest instance
static MessageDigest	getSha512MessageDigestInstance() Gets a SHA-512 message digest instance
static byte[]	transformHmacKey(byte[] digest, byte[] transform) From HmacBlockStream.cs GetHmacKey64 Calculates the block key for the block number ...

Methods inherited from class java.lang.Object

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

Constructor Detail

Encryption

public Encryption()

Method Detail

getSha256MessageDigestInstance

public static MessageDigest getSha256MessageDigestInstance()

Gets a SHA-256 message digest instance

Returns:

A MessageDigest

getSha512MessageDigestInstance

public static MessageDigest getSha512MessageDigestInstance()

Gets a SHA-512 message digest instance

Returns:

A MessageDigest

getHMacSha256Instance

public static Mac getHMacSha256Instance(byte[] key)

Gets an HMacSha256 Mac

Parameters:

key - the key

Returns:

the Mac initialised with the key

transformHmacKey

public static byte[] transformHmacKey(byte[] digest,
                                      byte[] transform)

From HmacBlockStream.cs GetHmacKey64 Calculates the block key for the block number ...

Parameters:

digest - the HMAC key digest

transform - the transform seed (the block number, 8 bytes)

Returns:

a key