mail.node.crypt
Class CryptEngine

java.lang.Object
  mail.node.crypt.CryptEngine

Direct Known Subclasses:

MyCryptEngine, OtherCryptEngine

public abstract class CryptEngine
extends java.lang.Object

Author:

Arne Müller

Constructor Summary

CryptEngine()

Method Summary

abstract boolean	checkSignature(org.w3c.dom.Element signature) decodes the signature with the public key and then checks it
abstract void	decrypt(org.w3c.dom.Element data) decrypt data with the private key The document that contains the Element will be modified!
abstract void	encrypt(org.w3c.dom.Element data) encrypt data with the public key The document that contains the Element will be modified!
static byte[]	fromHex(java.lang.String s)
private static int	fromHexChar(char c)
ID	getID() computes the ID of the user with the public Key returned by getPublicKey()
static ID	getID(byte[] key) computes an ID out of an Public key.
abstract byte[]	getPublicKey()
abstract java.lang.String	getPublicKeyString()
abstract void	sign(org.w3c.dom.Element data) sign data with the private key The document that contains the Element will be modified!
static java.lang.String	toHex(byte[] arr)
private static char	toHexChar(int b)

Methods inherited from class java.lang.Object

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

Constructor Detail

CryptEngine

public CryptEngine()

Method Detail

encrypt

public abstract void encrypt(org.w3c.dom.Element data)
                      throws EncryptionException

encrypt data with the public key The document that contains the Element will be modified! Data will change! It won't be available afterwards

Parameters:

data - to be encrypted

Throws:

EncryptionException

sign

public abstract void sign(org.w3c.dom.Element data)
                   throws EncryptionException

sign data with the private key The document that contains the Element will be modified! Data will be extended, but it will keep being a valid element.

Parameters:

data - to be signed

Throws:

EncryptionException

checkSignature

public abstract boolean checkSignature(org.w3c.dom.Element signature)
                                throws EncryptionException

decodes the signature with the public key and then checks it

Parameters:

signature - to check

Returns:

true, if signature is ok

Throws:

EncryptionException

decrypt

public abstract void decrypt(org.w3c.dom.Element data)
                      throws EncryptionException

decrypt data with the private key The document that contains the Element will be modified! Data will change!

Parameters:

data - to be decrypted

Throws:

EncryptionException

getPublicKey

public abstract byte[] getPublicKey()

getPublicKeyString

public abstract java.lang.String getPublicKeyString()

getID

public ID getID()

computes the ID of the user with the public Key returned by getPublicKey()

Returns:

the ID

See Also:

#getID(PublicKey)

getID

public static final ID getID(byte[] key)

computes an ID out of an Public key. A simple hash function is used. This is needed, so all ID's have the same length

Parameters:

k - the public Key to compute the ID of

Returns:

toHexChar

private static char toHexChar(int b)

fromHexChar

private static int fromHexChar(char c)

toHex

public static java.lang.String toHex(byte[] arr)

fromHex

public static byte[] fromHex(java.lang.String s)