Constructor Detail

• Cipher

  public Cipher(CipherProvider provider)

Method Detail

• getProvider

  public CipherProvider getProvider()

  Return the provider for this Cipher

• getName

  public abstract String getName()

  Return this Cipher's name

• getKeyLength

  public abstract int getKeyLength()

  Return the key length required by this cipher, in bytes

• getIvLength

  public abstract int getIvLength()

  Return the expected initialization vector length, in bytes, or 0 if not applicable

• getRandomKey

  public abstract Key getRandomKey()

  Create a random symmetric key

  Returns:

  the random symmetric key

• getEncryptor

  public abstract Encryptor getEncryptor()

  Get an encryptor for encrypting data.

• getDecryptor

  public abstract Decryptor getDecryptor()

  Return a decryptor for decrypting data.

• createEncryptionStream

  public abstract OutputStream createEncryptionStream(OutputStream out,
                                    Context context,
                                    byte[] iv)
                                               throws IOException

  Create an encrypting output stream given a context and IV

  Parameters:

  out - the output stream to wrap

  context - the encryption context

  iv - initialization vector

  Returns:

  the encrypting wrapper

  Throws:

  IOException

• createEncryptionStream

  public abstract OutputStream createEncryptionStream(OutputStream out,
                                    Encryptor encryptor)
                                               throws IOException

  Create an encrypting output stream given an initialized encryptor

  Parameters:

  out - the output stream to wrap

  encryptor - the encryptor

  Returns:

  the encrypting wrapper

  Throws:

  IOException

• createDecryptionStream

  public abstract InputStream createDecryptionStream(InputStream in,
                                   Context context,
                                   byte[] iv)
                                              throws IOException

  Create a decrypting input stream given a context and IV

  Parameters:

  in - the input stream to wrap

  context - the encryption context

  iv - initialization vector

  Returns:

  the decrypting wrapper

  Throws:

  IOException

• createDecryptionStream

  public abstract InputStream createDecryptionStream(InputStream in,
                                   Decryptor decryptor)
                                              throws IOException

  Create a decrypting output stream given an initialized decryptor

  Parameters:

  in - the input stream to wrap

  decryptor - the decryptor

  Returns:

  the decrypting wrapper

  Throws:

  IOException