1 files changed, 0 insertions, 225 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/modes/SICBlockCipher.java b/core/src/main/java/org/bouncycastle/crypto/modes/SICBlockCipher.java
deleted file mode 100644
index 5dd47ae6..00000000
--- a/core/src/main/java/org/bouncycastle/crypto/modes/SICBlockCipher.java
+++ /dev/null
@@ -1,225 +0,0 @@
-package org.bouncycastle.crypto.modes;
-
-import org.bouncycastle.crypto.BlockCipher;
-import org.bouncycastle.crypto.CipherParameters;
-import org.bouncycastle.crypto.DataLengthException;
-import org.bouncycastle.crypto.SkippingStreamCipher;
-import org.bouncycastle.crypto.StreamBlockCipher;
-import org.bouncycastle.crypto.params.ParametersWithIV;
-import org.bouncycastle.util.Pack;
-
-/**
- * Implements the Segmented Integer Counter (SIC) mode on top of a simple
- * block cipher. This mode is also known as CTR mode.
- */
-public class SICBlockCipher
-    extends StreamBlockCipher
-    implements SkippingStreamCipher
-{
-    private final BlockCipher     cipher;
-    private final int             blockSize;
-    
-    private byte[]          IV;
-    private byte[]          counter;
-    private byte[]          counterOut;
-    private int             byteCount;
-
-    /**
-     * Basic constructor.
-     *
-     * @param c the block cipher to be used.
-     */
-    public SICBlockCipher(BlockCipher c)
-    {
-        super(c);
-
-        this.cipher = c;
-        this.blockSize = cipher.getBlockSize();
-        this.IV = new byte[blockSize];
-        this.counter = new byte[blockSize];
-        this.counterOut = new byte[blockSize];
-        this.byteCount = 0;
-    }
-
-    public void init(
-        boolean             forEncryption, //ignored by this CTR mode
-        CipherParameters    params)
-        throws IllegalArgumentException
-    {
-        if (params instanceof ParametersWithIV)
-        {
-            ParametersWithIV ivParam = (ParametersWithIV)params;
-            byte[] iv = ivParam.getIV();
-            System.arraycopy(iv, 0, IV, 0, IV.length);
-
-            // if null it's an IV changed only.
-            if (ivParam.getParameters() != null)
-            {
-                cipher.init(true, ivParam.getParameters());
-            }
-
-            reset();
-        }
-        else
-        {
-            throw new IllegalArgumentException("SIC mode requires ParametersWithIV");
-        }
-    }
-
-    public String getAlgorithmName()
-    {
-        return cipher.getAlgorithmName() + "/SIC";
-    }
-
-    public int getBlockSize()
-    {
-        return cipher.getBlockSize();
-    }
-
-    public int processBlock(byte[] in, int inOff, byte[] out, int outOff)
-          throws DataLengthException, IllegalStateException
-    {
-        processBytes(in, inOff, blockSize, out, outOff);
-
-        return blockSize;
-    }
-
-    protected byte calculateByte(byte in)
-          throws DataLengthException, IllegalStateException
-    {
-        if (byteCount == 0)
-        {
-            cipher.processBlock(counter, 0, counterOut, 0);
-
-            return (byte)(counterOut[byteCount++] ^ in);
-        }
-
-        byte rv = (byte)(counterOut[byteCount++] ^ in);
-
-        if (byteCount == counter.length)
-        {
-            byteCount = 0;
-
-            incrementCounter();
-        }
-
-        return rv;
-    }
-
-    private void incrementCounter()
-    {
-        // increment counter by 1.
-        for (int i = counter.length - 1; i >= 0 && ++counter[i] == 0; i--)
-        {
-            ; // do nothing - pre-increment and test for 0 in counter does the job.
-        }
-    }
-
-    private void decrementCounter()
-    {
-        if (counter[0] == 0)
-        {
-            boolean nonZero = false;
-
-            for (int i = counter.length - 1; i > 0; i--)
-            {
-                if (counter[i] != 0)
-                {
-                    nonZero = true;
-                }
-            }
-
-            if (!nonZero)
-            {
-                throw new IllegalStateException("attempt to reduce counter past zero.");
-            }
-        }
-
-        // decrement counter by 1.
-        for (int i = counter.length - 1; i >= 0 && --counter[i] == -1; i--)
-        {
-            ;
-        }
-    }
-
-    private void adjustCounter(long n)
-    {
-        if (n >= 0)
-        {
-            long numBlocks = (n + byteCount) / blockSize;
-
-            for (long i = 0; i != numBlocks; i++)
-            {
-                incrementCounter();
-            }
-
-            byteCount = (int)((n + byteCount) - (blockSize * numBlocks));
-        }
-        else
-        {
-            long numBlocks = (-n - byteCount) / blockSize;
-
-            for (long i = 0; i != numBlocks; i++)
-            {
-                decrementCounter();
-            }
-
-            int gap = (int)(byteCount + n + (blockSize * numBlocks));
-
-            if (gap >= 0)
-            {
-                byteCount = 0;
-            }
-            else
-            {
-                decrementCounter();
-                byteCount =  blockSize + gap;
-            }
-        }
-    }
-
-    public void reset()
-    {
-        System.arraycopy(IV, 0, counter, 0, counter.length);
-        cipher.reset();
-        this.byteCount = 0;
-    }
-
-    public long skip(long numberOfBytes)
-    {
-        adjustCounter(numberOfBytes);
-
-        cipher.processBlock(counter, 0, counterOut, 0);
-
-        return numberOfBytes;
-    }
-
-    public long seekTo(long position)
-    {
-        reset();
-
-        return skip(position);
-    }
-
-    public long getPosition()
-    {
-        byte[] res = new byte[IV.length];
-
-        System.arraycopy(counter, 0, res, 0, res.length);
-
-        for (int i = res.length - 1; i >= 1; i--)
-        {
-            int v = (res[i] - IV[i]);
-
-            if (v < 0)
-            {
-               res[i - 1]--;
-               v += 256;
-            }
-
-            res[i] = (byte)v;
-        }
-
-        return Pack.bigEndianToLong(res, res.length - 8) * blockSize + byteCount;
-    }
-}