Package org.cryptacular.pbe

Class AbstractEncryptionScheme

java.lang.Object
org.cryptacular.pbe.AbstractEncryptionScheme
All Implemented Interfaces:
EncryptionScheme
Direct Known Subclasses:
OpenSSLEncryptionScheme, PBES1EncryptionScheme, PBES2EncryptionScheme
public abstract class AbstractEncryptionScheme extends Object implements EncryptionScheme
Abstract base class for password-based encryption schemes based on salt data and iterated hashing as the basis of the key derivation function.

NOTE: Classes derived from this class are not thread safe. In particular, care should be taken to prevent multiple threads from performing encryption and/or decryption concurrently.

Version:
$Revision: 2744 $
Author:
Middleware Services

  • Constructor Summary

    Constructors
    Constructor
    Description
    AbstractEncryptionScheme()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    byte[]
    decrypt(byte[] ciphertext)
    Decrypts the given ciphertext into plaintext using the derived key.
    void
    decrypt(InputStream in, OutputStream out)
    Decrypts ciphertext from an input stream into plaintext in the output stream.
    byte[]
    encrypt(byte[] plaintext)
    Encrypts the given plaintext bytes into a byte array of ciphertext using the derived key.
    void
    encrypt(InputStream in, OutputStream out)
    Encrypts the data in the given plaintext input stream into ciphertext in the output stream.
    protected void
    setCipher(org.bouncycastle.crypto.BufferedBlockCipher bufferedBlockCipher)
    Sets the block cipher used for encryption/decryption.
    protected void
    setCipherParameters(org.bouncycastle.crypto.CipherParameters parameters)
    Sets block cipher initialization parameters.
    OutputStream
    wrap(boolean encryptionFlag, OutputStream out)
    Wraps an output stream with one that performs encryption or decryption on the fly.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • AbstractEncryptionScheme

      public AbstractEncryptionScheme()

  • Method Details

    • encrypt

      public byte[] encrypt(byte[] plaintext)
      Description copied from interface: EncryptionScheme
      Encrypts the given plaintext bytes into a byte array of ciphertext using the derived key.
      Specified by:
      encrypt in interface EncryptionScheme
      Parameters:
      plaintext - Input plaintext bytes.
      Returns:
      Ciphertext resulting from plaintext encryption.

    • encrypt

      public void encrypt(InputStream in, OutputStream out) throws IOException
      Description copied from interface: EncryptionScheme
      Encrypts the data in the given plaintext input stream into ciphertext in the output stream. Use EncodingOutputStream to produce ciphertext bytes that encoded as a string data in the output stream.
      Specified by:
      encrypt in interface EncryptionScheme
      Parameters:
      in - Input stream of plaintext.
      out - Output stream of ciphertext.
      Throws:
      IOException - On stream read/write errors.

    • decrypt

      public byte[] decrypt(byte[] ciphertext)
      Description copied from interface: EncryptionScheme
      Decrypts the given ciphertext into plaintext using the derived key.
      Specified by:
      decrypt in interface EncryptionScheme
      Parameters:
      ciphertext - Input ciphertext bytes.
      Returns:
      Plaintext resulting from ciphertext decryption.

    • decrypt

      public void decrypt(InputStream in, OutputStream out) throws IOException
      Description copied from interface: EncryptionScheme
      Decrypts ciphertext from an input stream into plaintext in the output stream. Use DecodingInputStream to handle input ciphertext encoded as string data.
      Specified by:
      decrypt in interface EncryptionScheme
      Parameters:
      in - Input stream of ciphertext.
      out - Output stream of plaintext.
      Throws:
      IOException - On stream read/write errors.

    • wrap

      public OutputStream wrap(boolean encryptionFlag, OutputStream out)
      Description copied from interface: EncryptionScheme
      Wraps an output stream with one that performs encryption or decryption on the fly.
      Specified by:
      wrap in interface EncryptionScheme
      Parameters:
      encryptionFlag - True to signal encryption, false for decryption.
      out - Output stream to wrap
      Returns:
      Wrapped output steam.

    • setCipher

      protected void setCipher(org.bouncycastle.crypto.BufferedBlockCipher bufferedBlockCipher)
      Sets the block cipher used for encryption/decryption.
      Parameters:
      bufferedBlockCipher - Buffered block cipher.

    • setCipherParameters

      protected void setCipherParameters(org.bouncycastle.crypto.CipherParameters parameters)
      Sets block cipher initialization parameters.
      Parameters:
      parameters - Cipher-specific init params.