de.intarsys.tools.crypto

Class StandardCryptdec

java.lang.Object

de.intarsys.tools.crypto.StandardCryptdec

All Implemented Interfaces:

ICryptdec

public class StandardCryptdec
extends Object
implements ICryptdec

A default ICryptdec implementation based on the JCA.

Constructor Summary

Constructors

Constructor and Description
StandardCryptdec(String id, Cipher eCipher, Cipher dCipher, byte[] iv)

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	decrypt(byte[] bytes) Decrypt bytes and return the decrypted data.
void	decryptFinal(OutputStream os) Finalize a pending decryption process with the data in the internal buffer.
void	decryptUpdate(InputStream is, OutputStream os) Append all bytes from input stream is to the internal buffer for decryption.
byte[]	encrypt(byte[] bytes) Decrypt bytes and return the decrypted data.
void	encryptFinal(OutputStream os) Finalize a pending decryption process with the data in the internal buffer.
void	encryptUpdate(InputStream is, OutputStream os) Append all bytes from input stream is to the internal buffer for decryption.
String	getId() A unique id for the ICryptdec.
byte[]	getInitializationVector()

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardCryptdec

public StandardCryptdec(String id,
                Cipher eCipher,
                Cipher dCipher,
                byte[] iv)

Method Detail

decrypt

public byte[] decrypt(byte[] bytes)
               throws IOException

Description copied from interface: ICryptdec

Decrypt bytes and return the decrypted data. The ICryptdec may be reused after this operation finished successful.

Specified by:

decrypt in interface ICryptdec

Returns:

Throws:

IOException

decryptFinal

public void decryptFinal(OutputStream os)
                  throws IOException

Description copied from interface: ICryptdec

Finalize a pending decryption process with the data in the internal buffer. The buffered data is optionally padded and decrypted, the output is written to os. The ICryptdec may be reused after this operation finished successful.

Specified by:

decryptFinal in interface ICryptdec

Throws:

IOException

decryptUpdate

public void decryptUpdate(InputStream is,
                 OutputStream os)
                   throws IOException

Description copied from interface: ICryptdec

Append all bytes from input stream is to the internal buffer for decryption. If any output is generated (e.g. with block ciphers) it is written to os.

Specified by:

decryptUpdate in interface ICryptdec

Throws:

IOException

encrypt

public byte[] encrypt(byte[] bytes)
               throws IOException

Description copied from interface: ICryptdec

Decrypt bytes and return the decrypted data. The ICryptdec may be reused after this operation finished successful.

Specified by:

encrypt in interface ICryptdec

Returns:

Throws:

IOException

encryptFinal

public void encryptFinal(OutputStream os)
                  throws IOException

Description copied from interface: ICryptdec

Finalize a pending decryption process with the data in the internal buffer. The buffered data is optionally padded and decrypted, the output is written to os. The ICryptdec may be reused after this operation finished successful.

Specified by:

encryptFinal in interface ICryptdec

Throws:

IOException

encryptUpdate

public void encryptUpdate(InputStream is,
                 OutputStream os)
                   throws IOException

Description copied from interface: ICryptdec

Append all bytes from input stream is to the internal buffer for decryption. If any output is generated (e.g. with block ciphers) it is written to os.

Specified by:

encryptUpdate in interface ICryptdec

Throws:

IOException

getId

public String getId()

Description copied from interface: ICryptdec

A unique id for the ICryptdec. This may be used to tag encrypted data for later decryption.

Specified by:

getId in interface ICryptdec

Returns:

A unique id for the ICryptdec

getInitializationVector

public byte[] getInitializationVector()