mail.node.crypt
Class OtherCryptEngine

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

public class OtherCryptEngine
extends CryptEngine

Author:

Arne Müller

Field Summary

(package private) ID	id
(package private) java.security.PublicKey	pubkey

Constructor Summary

OtherCryptEngine(ID id)

OtherCryptEngine(java.lang.String publicKey)
Creates a CryptEngine that is initialised with a public key.

Method Summary

boolean	checkSignature(org.w3c.dom.Element data) decodes the signature with the public key and then checks it
void	decrypt(org.w3c.dom.Element data) decrypt data with the private key The document that contains the Element will be modified!
void	encrypt(org.w3c.dom.Element data) encrypt data with the public key The document that contains the Element will be modified!
private static javax.crypto.SecretKey	generateDataEncryptionKey() Get a key to be used for encrypting the element.
ID	getID() computes the ID of the user with the public Key returned by CryptEngine.getPublicKey()
byte[]	getPublicKey()
java.lang.String	getPublicKeyString()
void	sign(org.w3c.dom.Element data) sign data with the private key The document that contains the Element will be modified!

Methods inherited from class mail.node.crypt.CryptEngine

fromHex, getID, toHex

Methods inherited from class java.lang.Object

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

Field Detail

pubkey

java.security.PublicKey pubkey

id

ID id

Constructor Detail

OtherCryptEngine

public OtherCryptEngine(java.lang.String publicKey)
                 throws CryptCreationException

Creates a CryptEngine that is initialised with a public key. The String specifying the public Key must be of the form
ALGORITHM:FORMAT:HEXDATA

Parameters:

publicKey -

Throws:

CryptCreationException

OtherCryptEngine

public OtherCryptEngine(ID id)

Method Detail

getID

public ID getID()

Description copied from class: CryptEngine

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

Overrides:

getID in class CryptEngine

Returns:

the ID

See Also:

#getID(PublicKey)

decrypt

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

Description copied from class: CryptEngine

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

Specified by:

decrypt in class CryptEngine

Parameters:

data - to be decrypted

Throws:

EncryptionException

generateDataEncryptionKey

private static javax.crypto.SecretKey generateDataEncryptionKey()
                                                         throws java.lang.Exception

Get a key to be used for encrypting the element. Here we are generating an AES key.

Throws:

java.lang.Exception

encrypt

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

Description copied from class: CryptEngine

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

Specified by:

encrypt in class CryptEngine

Parameters:

data - to be encrypted

Throws:

EncryptionException

getPublicKey

public byte[] getPublicKey()

Specified by:

getPublicKey in class CryptEngine

getPublicKeyString

public java.lang.String getPublicKeyString()

Specified by:

getPublicKeyString in class CryptEngine

checkSignature

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

Description copied from class: CryptEngine

decodes the signature with the public key and then checks it

Specified by:

checkSignature in class CryptEngine

Parameters:

data - to check

Returns:

true, if signature is ok

Throws:

EncryptionException

sign

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

Description copied from class: CryptEngine

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.

Specified by:

sign in class CryptEngine

Parameters:

data - to be signed

Throws:

EncryptionException