de.intarsys.tools.crypto

Interface ICryptdec

All Known Implementing Classes:

NullCryptdec, StandardCryptdec

public interface ICryptdec

En/Decrypt data. The ICryptdec provides a ready to use interface for encryption purposes. The implementation algorithm and parameters are hidden. An ICryptdec can not be used by multiple threads concurrently, it holds the current crypto state.

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.

Method Detail

decrypt

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

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

Parameters:

bytes -

Returns:

Throws:

IOException

decryptFinal

void decryptFinal(OutputStream os)
                  throws IOException

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.

Parameters:

os -

Throws:

IOException

decryptUpdate

void decryptUpdate(InputStream is,
                 OutputStream os)
                   throws IOException

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.

Parameters:

is -

os -

Throws:

IOException

encrypt

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

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

Parameters:

bytes -

Returns:

Throws:

IOException

encryptFinal

void encryptFinal(OutputStream os)
                  throws IOException

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.

Parameters:

os -

Throws:

IOException

encryptUpdate

void encryptUpdate(InputStream is,
                 OutputStream os)
                   throws IOException

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.

Parameters:

bytes -

offset -

len -

os -

Throws:

IOException

getId

String getId()

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

Returns:

A unique id for the ICryptdec