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org.bouncycastle.crypto.engines
public class: RijndaelEngine [javadoc | source]

java.lang.Object
   org.bouncycastle.crypto.engines.RijndaelEngine

All Implemented Interfaces:
    BlockCipher

an implementation of Rijndael, based on the documentation and reference implementation by Paulo Barreto, Vincent Rijmen, for v2.0 August '99.

Note: this implementation is based on information prior to final NIST publication.

Field Summary
static  byte[][]	shifts0
static  byte[][]	shifts1

Constructor:
public RijndaelEngine() { this(128); } default constructor - 128 bit block size.
public RijndaelEngine(int blockBits) { switch (blockBits) { case 128: BC = 32; BC_MASK = 0xffffffffL; shifts0SC = shifts0[0]; shifts1SC = shifts1[0]; break; case 160: BC = 40; BC_MASK = 0xffffffffffL; shifts0SC = shifts0[1]; shifts1SC = shifts1[1]; break; case 192: BC = 48; BC_MASK = 0xffffffffffffL; shifts0SC = shifts0[2]; shifts1SC = shifts1[2]; break; case 224: BC = 56; BC_MASK = 0xffffffffffffffL; shifts0SC = shifts0[3]; shifts1SC = shifts1[3]; break; case 256: BC = 64; BC_MASK = 0xffffffffffffffffL; shifts0SC = shifts0[4]; shifts1SC = shifts1[4]; break; default: throw new IllegalArgumentException("unknown blocksize to Rijndael"); } this.blockBits = blockBits; } basic constructor - set the cipher up for a given blocksize Parameters: blockBits - the blocksize in bits, must be 128, 192, or 256.

Method from org.bouncycastle.crypto.engines.RijndaelEngine Summary:
getAlgorithmName,   getBlockSize,   init,   processBlock,   reset

Methods from java.lang.Object:
equals,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait

Method from org.bouncycastle.crypto.engines.RijndaelEngine Detail:
public String getAlgorithmName() { return "Rijndael"; }
public int getBlockSize() { return BC / 2; }
public void init(boolean forEncryption, CipherParameters params) { if (params instanceof KeyParameter) { workingKey = generateWorkingKey(((KeyParameter)params).getKey()); this.forEncryption = forEncryption; return; } throw new IllegalArgumentException("invalid parameter passed to Rijndael init - " + params.getClass().getName()); } initialise a Rijndael cipher.
public int processBlock(byte[] in, int inOff, byte[] out, int outOff) { if (workingKey == null) { throw new IllegalStateException("Rijndael engine not initialised"); } if ((inOff + (BC / 2)) > in.length) { throw new DataLengthException("input buffer too short"); } if ((outOff + (BC / 2)) > out.length) { throw new DataLengthException("output buffer too short"); } if (forEncryption) { unpackBlock(in, inOff); encryptBlock(workingKey); packBlock(out, outOff); } else { unpackBlock(in, inOff); decryptBlock(workingKey); packBlock(out, outOff); } return BC / 2; }
public void reset() { }