// 
// Decompiled by Procyon v0.6.0
// 

package org.bouncycastle.crypto.engines;

import java.util.Enumeration;
import org.bouncycastle.crypto.OutputLengthException;
import org.bouncycastle.crypto.DataLengthException;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.crypto.params.ParametersWithSBox;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.CryptoServiceProperties;
import org.bouncycastle.crypto.CryptoServicesRegistrar;
import org.bouncycastle.crypto.constraints.DefaultServiceProperties;
import org.bouncycastle.util.Strings;
import java.util.Hashtable;
import org.bouncycastle.crypto.BlockCipher;

public class GOST28147Engine implements BlockCipher
{
    protected static final int BLOCK_SIZE = 8;
    private int[] workingKey;
    private boolean forEncryption;
    private byte[] S;
    private static byte[] Sbox_Default;
    private static byte[] ESbox_Test;
    private static byte[] ESbox_A;
    private static byte[] ESbox_B;
    private static byte[] ESbox_C;
    private static byte[] ESbox_D;
    private static byte[] Param_Z;
    private static byte[] DSbox_Test;
    private static byte[] DSbox_A;
    private static Hashtable sBoxes;
    
    private static void addSBox(final String s, final byte[] value) {
        GOST28147Engine.sBoxes.put(Strings.toUpperCase(s), value);
    }
    
    public GOST28147Engine() {
        this.workingKey = null;
        this.S = GOST28147Engine.Sbox_Default;
        CryptoServicesRegistrar.checkConstraints(new DefaultServiceProperties(this.getAlgorithmName(), 178));
    }
    
    @Override
    public void init(final boolean b, final CipherParameters cipherParameters) {
        if (cipherParameters instanceof ParametersWithSBox) {
            final ParametersWithSBox parametersWithSBox = (ParametersWithSBox)cipherParameters;
            final byte[] sBox = parametersWithSBox.getSBox();
            if (sBox.length != GOST28147Engine.Sbox_Default.length) {
                throw new IllegalArgumentException("invalid S-box passed to GOST28147 init");
            }
            this.S = Arrays.clone(sBox);
            if (parametersWithSBox.getParameters() != null) {
                this.workingKey = this.generateWorkingKey(b, ((KeyParameter)parametersWithSBox.getParameters()).getKey());
            }
        }
        else if (cipherParameters instanceof KeyParameter) {
            this.workingKey = this.generateWorkingKey(b, ((KeyParameter)cipherParameters).getKey());
        }
        else if (cipherParameters != null) {
            throw new IllegalArgumentException("invalid parameter passed to GOST28147 init - " + cipherParameters.getClass().getName());
        }
        CryptoServicesRegistrar.checkConstraints(new DefaultServiceProperties(this.getAlgorithmName(), 178, cipherParameters, Utils.getPurpose(b)));
    }
    
    @Override
    public String getAlgorithmName() {
        return "GOST28147";
    }
    
    @Override
    public int getBlockSize() {
        return 8;
    }
    
    @Override
    public int processBlock(final byte[] array, final int n, final byte[] array2, final int n2) {
        if (this.workingKey == null) {
            throw new IllegalStateException("GOST28147 engine not initialised");
        }
        if (n + 8 > array.length) {
            throw new DataLengthException("input buffer too short");
        }
        if (n2 + 8 > array2.length) {
            throw new OutputLengthException("output buffer too short");
        }
        this.GOST28147Func(this.workingKey, array, n, array2, n2);
        return 8;
    }
    
    @Override
    public void reset() {
    }
    
    private int[] generateWorkingKey(final boolean forEncryption, final byte[] array) {
        this.forEncryption = forEncryption;
        if (array.length != 32) {
            throw new IllegalArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!");
        }
        final int[] array2 = new int[8];
        for (int i = 0; i != 8; ++i) {
            array2[i] = this.bytesToint(array, i * 4);
        }
        return array2;
    }
    
    private int GOST28147_mainStep(final int n, final int n2) {
        final int n3 = n2 + n;
        final int n4 = (this.S[0 + (n3 >> 0 & 0xF)] << 0) + (this.S[16 + (n3 >> 4 & 0xF)] << 4) + (this.S[32 + (n3 >> 8 & 0xF)] << 8) + (this.S[48 + (n3 >> 12 & 0xF)] << 12) + (this.S[64 + (n3 >> 16 & 0xF)] << 16) + (this.S[80 + (n3 >> 20 & 0xF)] << 20) + (this.S[96 + (n3 >> 24 & 0xF)] << 24) + (this.S[112 + (n3 >> 28 & 0xF)] << 28);
        return n4 << 11 | n4 >>> 21;
    }
    
    private void GOST28147Func(final int[] array, final byte[] array2, final int n, final byte[] array3, final int n2) {
        int bytesToint = this.bytesToint(array2, n);
        int bytesToint2 = this.bytesToint(array2, n + 4);
        if (this.forEncryption) {
            for (int i = 0; i < 3; ++i) {
                for (int j = 0; j < 8; ++j) {
                    final int n3 = bytesToint;
                    bytesToint = (bytesToint2 ^ this.GOST28147_mainStep(bytesToint, array[j]));
                    bytesToint2 = n3;
                }
            }
            for (int k = 7; k > 0; --k) {
                final int n4 = bytesToint;
                bytesToint = (bytesToint2 ^ this.GOST28147_mainStep(bytesToint, array[k]));
                bytesToint2 = n4;
            }
        }
        else {
            for (int l = 0; l < 8; ++l) {
                final int n5 = bytesToint;
                bytesToint = (bytesToint2 ^ this.GOST28147_mainStep(bytesToint, array[l]));
                bytesToint2 = n5;
            }
            for (int n6 = 0; n6 < 3; ++n6) {
                for (int n7 = 7; n7 >= 0 && (n6 != 2 || n7 != 0); --n7) {
                    final int n8 = bytesToint;
                    bytesToint = (bytesToint2 ^ this.GOST28147_mainStep(bytesToint, array[n7]));
                    bytesToint2 = n8;
                }
            }
        }
        final int n9 = bytesToint2 ^ this.GOST28147_mainStep(bytesToint, array[0]);
        this.intTobytes(bytesToint, array3, n2);
        this.intTobytes(n9, array3, n2 + 4);
    }
    
    private int bytesToint(final byte[] array, final int n) {
        return (array[n + 3] << 24 & 0xFF000000) + (array[n + 2] << 16 & 0xFF0000) + (array[n + 1] << 8 & 0xFF00) + (array[n] & 0xFF);
    }
    
    private void intTobytes(final int n, final byte[] array, final int n2) {
        array[n2 + 3] = (byte)(n >>> 24);
        array[n2 + 2] = (byte)(n >>> 16);
        array[n2 + 1] = (byte)(n >>> 8);
        array[n2] = (byte)n;
    }
    
    public static byte[] getSBox(final String s) {
        final byte[] array = GOST28147Engine.sBoxes.get(Strings.toUpperCase(s));
        if (array == null) {
            throw new IllegalArgumentException("Unknown S-Box - possible types: \"Default\", \"E-Test\", \"E-A\", \"E-B\", \"E-C\", \"E-D\", \"Param-Z\", \"D-Test\", \"D-A\".");
        }
        return Arrays.clone(array);
    }
    
    public static String getSBoxName(final byte[] array) {
        final Enumeration keys = GOST28147Engine.sBoxes.keys();
        while (keys.hasMoreElements()) {
            final String key = (String)keys.nextElement();
            if (Arrays.areEqual((byte[])GOST28147Engine.sBoxes.get(key), array)) {
                return key;
            }
        }
        throw new IllegalArgumentException("SBOX provided did not map to a known one");
    }
    
    static {
        GOST28147Engine.Sbox_Default = new byte[] { 4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3, 14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9, 5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11, 7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3, 6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2, 4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14, 13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12, 1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12 };
        GOST28147Engine.ESbox_Test = new byte[] { 4, 2, 15, 5, 9, 1, 0, 8, 14, 3, 11, 12, 13, 7, 10, 6, 12, 9, 15, 14, 8, 1, 3, 10, 2, 7, 4, 13, 6, 0, 11, 5, 13, 8, 14, 12, 7, 3, 9, 10, 1, 5, 2, 4, 6, 15, 0, 11, 14, 9, 11, 2, 5, 15, 7, 1, 0, 13, 12, 6, 10, 4, 3, 8, 3, 14, 5, 9, 6, 8, 0, 13, 10, 11, 7, 12, 2, 1, 15, 4, 8, 15, 6, 11, 1, 9, 12, 5, 13, 3, 7, 10, 0, 14, 2, 4, 9, 11, 12, 0, 3, 6, 7, 5, 4, 8, 14, 15, 1, 10, 2, 13, 12, 6, 5, 2, 11, 0, 9, 13, 3, 14, 7, 10, 15, 4, 1, 8 };
        GOST28147Engine.ESbox_A = new byte[] { 9, 6, 3, 2, 8, 11, 1, 7, 10, 4, 14, 15, 12, 0, 13, 5, 3, 7, 14, 9, 8, 10, 15, 0, 5, 2, 6, 12, 11, 4, 13, 1, 14, 4, 6, 2, 11, 3, 13, 8, 12, 15, 5, 10, 0, 7, 1, 9, 14, 7, 10, 12, 13, 1, 3, 9, 0, 2, 11, 4, 15, 8, 5, 6, 11, 5, 1, 9, 8, 13, 15, 0, 14, 4, 2, 3, 12, 7, 10, 6, 3, 10, 13, 12, 1, 2, 0, 11, 7, 5, 9, 4, 8, 15, 14, 6, 1, 13, 2, 9, 7, 10, 6, 0, 8, 12, 4, 5, 15, 3, 11, 14, 11, 10, 15, 5, 0, 12, 14, 8, 6, 2, 3, 9, 1, 7, 13, 4 };
        GOST28147Engine.ESbox_B = new byte[] { 8, 4, 11, 1, 3, 5, 0, 9, 2, 14, 10, 12, 13, 6, 7, 15, 0, 1, 2, 10, 4, 13, 5, 12, 9, 7, 3, 15, 11, 8, 6, 14, 14, 12, 0, 10, 9, 2, 13, 11, 7, 5, 8, 15, 3, 6, 1, 4, 7, 5, 0, 13, 11, 6, 1, 2, 3, 10, 12, 15, 4, 14, 9, 8, 2, 7, 12, 15, 9, 5, 10, 11, 1, 4, 0, 13, 6, 8, 14, 3, 8, 3, 2, 6, 4, 13, 14, 11, 12, 1, 7, 15, 10, 0, 9, 5, 5, 2, 10, 11, 9, 1, 12, 3, 7, 4, 13, 0, 6, 15, 8, 14, 0, 4, 11, 14, 8, 3, 7, 1, 10, 2, 9, 6, 15, 13, 5, 12 };
        GOST28147Engine.ESbox_C = new byte[] { 1, 11, 12, 2, 9, 13, 0, 15, 4, 5, 8, 14, 10, 7, 6, 3, 0, 1, 7, 13, 11, 4, 5, 2, 8, 14, 15, 12, 9, 10, 6, 3, 8, 2, 5, 0, 4, 9, 15, 10, 3, 7, 12, 13, 6, 14, 1, 11, 3, 6, 0, 1, 5, 13, 10, 8, 11, 2, 9, 7, 14, 15, 12, 4, 8, 13, 11, 0, 4, 5, 1, 2, 9, 3, 12, 14, 6, 15, 10, 7, 12, 9, 11, 1, 8, 14, 2, 4, 7, 3, 6, 5, 10, 0, 15, 13, 10, 9, 6, 8, 13, 14, 2, 0, 15, 3, 5, 11, 4, 1, 12, 7, 7, 4, 0, 5, 10, 2, 15, 14, 12, 6, 1, 11, 13, 9, 3, 8 };
        GOST28147Engine.ESbox_D = new byte[] { 15, 12, 2, 10, 6, 4, 5, 0, 7, 9, 14, 13, 1, 11, 8, 3, 11, 6, 3, 4, 12, 15, 14, 2, 7, 13, 8, 0, 5, 10, 9, 1, 1, 12, 11, 0, 15, 14, 6, 5, 10, 13, 4, 8, 9, 3, 7, 2, 1, 5, 14, 12, 10, 7, 0, 13, 6, 2, 11, 4, 9, 3, 15, 8, 0, 12, 8, 9, 13, 2, 10, 11, 7, 3, 6, 5, 4, 14, 15, 1, 8, 0, 15, 3, 2, 5, 14, 11, 1, 10, 4, 7, 12, 9, 13, 6, 3, 0, 6, 15, 1, 14, 9, 2, 13, 8, 12, 4, 11, 10, 5, 7, 1, 10, 6, 8, 15, 11, 0, 4, 12, 3, 5, 9, 7, 13, 2, 14 };
        GOST28147Engine.Param_Z = new byte[] { 12, 4, 6, 2, 10, 5, 11, 9, 14, 8, 13, 7, 0, 3, 15, 1, 6, 8, 2, 3, 9, 10, 5, 12, 1, 14, 4, 7, 11, 13, 0, 15, 11, 3, 5, 8, 2, 15, 10, 13, 14, 1, 7, 4, 12, 9, 6, 0, 12, 8, 2, 1, 13, 4, 15, 6, 7, 0, 10, 5, 3, 14, 9, 11, 7, 15, 5, 10, 8, 1, 6, 13, 0, 9, 3, 14, 11, 4, 2, 12, 5, 13, 15, 6, 9, 2, 12, 10, 11, 7, 8, 1, 4, 3, 14, 0, 8, 14, 2, 5, 6, 9, 1, 12, 15, 4, 11, 0, 13, 10, 3, 7, 1, 7, 14, 13, 0, 5, 8, 3, 4, 15, 10, 6, 9, 12, 11, 2 };
        GOST28147Engine.DSbox_Test = new byte[] { 4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3, 14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9, 5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11, 7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3, 6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2, 4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14, 13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12, 1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12 };
        GOST28147Engine.DSbox_A = new byte[] { 10, 4, 5, 6, 8, 1, 3, 7, 13, 12, 14, 0, 9, 2, 11, 15, 5, 15, 4, 0, 2, 13, 11, 9, 1, 7, 6, 3, 12, 14, 10, 8, 7, 15, 12, 14, 9, 4, 1, 0, 3, 11, 5, 2, 6, 10, 8, 13, 4, 10, 7, 12, 0, 15, 2, 8, 14, 1, 6, 5, 13, 11, 9, 3, 7, 6, 4, 11, 9, 12, 2, 10, 1, 8, 0, 14, 15, 13, 3, 5, 7, 6, 2, 4, 13, 9, 15, 0, 10, 1, 5, 11, 8, 14, 12, 3, 13, 14, 4, 1, 7, 0, 5, 10, 3, 12, 8, 15, 6, 2, 9, 11, 1, 3, 10, 9, 5, 11, 4, 15, 8, 6, 7, 14, 13, 0, 2, 12 };
        GOST28147Engine.sBoxes = new Hashtable();
        addSBox("Default", GOST28147Engine.Sbox_Default);
        addSBox("E-TEST", GOST28147Engine.ESbox_Test);
        addSBox("E-A", GOST28147Engine.ESbox_A);
        addSBox("E-B", GOST28147Engine.ESbox_B);
        addSBox("E-C", GOST28147Engine.ESbox_C);
        addSBox("E-D", GOST28147Engine.ESbox_D);
        addSBox("Param-Z", GOST28147Engine.Param_Z);
        addSBox("D-TEST", GOST28147Engine.DSbox_Test);
        addSBox("D-A", GOST28147Engine.DSbox_A);
    }
}