Package net.i2p.crypto

Class CryptixRijndael_Algorithm

java.lang.Object
net.i2p.crypto.CryptixRijndael_Algorithm
public final class CryptixRijndael_Algorithm extends Object
Rijndael --pronounced Reindaal-- is a variable block-size (128-, 192- and 256-bit), variable key-size (128-, 192- and 256-bit) symmetric cipher.

Rijndael was written by Vincent Rijmen and Joan Daemen.

Portions of this code are Copyright © 1997, 1998 Systemics Ltd on behalf of the Cryptix Development Team.
All rights reserved.

Author:
Raif S. Naffah, Paulo S. L. M. Barreto License is apparently available from http://www.cryptix.org/docs/license.html

  • Constructor Summary

    Constructors
    Constructor
    Description
    CryptixRijndael_Algorithm()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static final void
    blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)
    Convenience method to decrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
    static final void
    blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)
    Decrypt exactly one block of ciphertext.
    static final void
    blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)
    Convenience method to encrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
    static final void
    blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)
    Encrypt exactly one block of plaintext.
    static final int
    blockSize()
     
    static final int
    getRounds(int keySize, int blockSize)
    Return The number of rounds for a given Rijndael's key and block sizes.
    static final Object
    makeKey(byte[] k)
    Convenience method to expand a user-supplied key material into a session key, assuming Rijndael's default block size (128-bit).
    static final Object
    makeKey(byte[] k, int blockSize)
    Expand a user-supplied key material into a session key.
    static final Object
    makeKey(byte[] k, int blockSize, CryptixAESKeyCache.KeyCacheEntry keyData)
    Expand a user-supplied key material into a session key.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • CryptixRijndael_Algorithm

      public CryptixRijndael_Algorithm()

  • Method Details

    • makeKey

      public static final Object makeKey(byte[] k) throws InvalidKeyException
      Convenience method to expand a user-supplied key material into a session key, assuming Rijndael's default block size (128-bit).
      Parameters:
      k - The 128/192/256-bit user-key to use.
      Returns:
      an array of two int[][] containing { Ke, Kd }
      Throws:
      InvalidKeyException - If the key is invalid.

    • blockEncrypt

      public static final void blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)
      Convenience method to encrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
      Parameters:
      in - The plaintext.
      result - The resulting ciphertext.
      inOffset - Index of in from which to start considering data.
      sessionKey - The session key to use for encryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Ke field for encryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.

    • blockDecrypt

      public static final void blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)
      Convenience method to decrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
      Parameters:
      in - The ciphertext.
      result - The resulting ciphertext
      inOffset - Index of in from which to start considering data.
      sessionKey - The session key to use for decryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Kd field, for decryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.

    • blockSize

      public static final int blockSize()
      Returns:
      The default length in bytes of the Algorithm input block.

    • makeKey

      public static final Object makeKey(byte[] k, int blockSize) throws InvalidKeyException
      Expand a user-supplied key material into a session key.
      Parameters:
      k - The 128/192/256-bit user-key to use.
      blockSize - The block size in bytes of this Rijndael, must be 16, 24, or 32.
      Returns:
      a CryptixAESKeyCache.KeyCacheEntry containing { Ke, Kd }. The actual return type is opaque, changed in 0.9.31, and is subject to change again.
      Throws:
      InvalidKeyException - If the key is invalid.

    • makeKey

      public static final Object makeKey(byte[] k, int blockSize, CryptixAESKeyCache.KeyCacheEntry keyData) throws InvalidKeyException
      Expand a user-supplied key material into a session key. Not for external use, not a public API.
      Parameters:
      k - The 128/192/256-bit user-key to use.
      blockSize - The block size in bytes of this Rijndael, must be 16, 24, or 32.
      keyData - a cached data structure to fill in, or null.
      Returns:
      a CryptixAESKeyCache.KeyCacheEntry containing { Ke, Kd }. If keyData is non-null, this is keyData. If keyData is null, this is newly allocated.
      Throws:
      InvalidKeyException - If the key is invalid.

    • blockEncrypt

      public static final void blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)
      Encrypt exactly one block of plaintext.
      Parameters:
      in - The plaintext.
      result - The resulting ciphertext.
      inOffset - Index of in from which to start considering data.
      sessionKey - The session key to use for encryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Ke field for encryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
      blockSize - The block size in bytes of this Rijndael.

    • blockDecrypt

      public static final void blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)
      Decrypt exactly one block of ciphertext.
      Parameters:
      in - The ciphertext.
      result - The resulting ciphertext.
      inOffset - Index of in from which to start considering data.
      sessionKey - The session key to use for decryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Kd field, for decryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
      blockSize - The block size in bytes of this Rijndael.

    • getRounds

      public static final int getRounds(int keySize, int blockSize)
      Return The number of rounds for a given Rijndael's key and block sizes.
      Parameters:
      keySize - The size of the user key material in bytes.
      blockSize - The desired block size in bytes.
      Returns:
      The number of rounds for a given Rijndael's key and block sizes.