?? gost28147engine.java
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package org.bouncycastle.crypto.engines;import java.util.Hashtable;import org.bouncycastle.crypto.BlockCipher;import org.bouncycastle.crypto.CipherParameters;import org.bouncycastle.crypto.DataLengthException;import org.bouncycastle.crypto.params.KeyParameter;import org.bouncycastle.crypto.params.ParametersWithSBox;/** * implementation of GOST 28147-89 */public class GOST28147Engine implements BlockCipher{ protected static final int BLOCK_SIZE = 8; private int[] workingKey = null; private boolean forEncryption; // these are the S-boxes given in Applied Cryptography 2nd Ed., p. 333 // This is default S-box! private byte S[] = { 0x4,0xA,0x9,0x2,0xD,0x8,0x0,0xE,0x6,0xB,0x1,0xC,0x7,0xF,0x5,0x3, 0xE,0xB,0x4,0xC,0x6,0xD,0xF,0xA,0x2,0x3,0x8,0x1,0x0,0x7,0x5,0x9, 0x5,0x8,0x1,0xD,0xA,0x3,0x4,0x2,0xE,0xF,0xC,0x7,0x6,0x0,0x9,0xB, 0x7,0xD,0xA,0x1,0x0,0x8,0x9,0xF,0xE,0x4,0x6,0xC,0xB,0x2,0x5,0x3, 0x6,0xC,0x7,0x1,0x5,0xF,0xD,0x8,0x4,0xA,0x9,0xE,0x0,0x3,0xB,0x2, 0x4,0xB,0xA,0x0,0x7,0x2,0x1,0xD,0x3,0x6,0x8,0x5,0x9,0xC,0xF,0xE, 0xD,0xB,0x4,0x1,0x3,0xF,0x5,0x9,0x0,0xA,0xE,0x7,0x6,0x8,0x2,0xC, 0x1,0xF,0xD,0x0,0x5,0x7,0xA,0x4,0x9,0x2,0x3,0xE,0x6,0xB,0x8,0xC }; /* * class content S-box parameters for encrypting * getting from, see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt * http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-02.txt */ private static byte[] ESbox_Test = { 0x4,0x2,0xF,0x5,0x9,0x1,0x0,0x8,0xE,0x3,0xB,0xC,0xD,0x7,0xA,0x6, 0xC,0x9,0xF,0xE,0x8,0x1,0x3,0xA,0x2,0x7,0x4,0xD,0x6,0x0,0xB,0x5, 0xD,0x8,0xE,0xC,0x7,0x3,0x9,0xA,0x1,0x5,0x2,0x4,0x6,0xF,0x0,0xB, 0xE,0x9,0xB,0x2,0x5,0xF,0x7,0x1,0x0,0xD,0xC,0x6,0xA,0x4,0x3,0x8, 0x3,0xE,0x5,0x9,0x6,0x8,0x0,0xD,0xA,0xB,0x7,0xC,0x2,0x1,0xF,0x4, 0x8,0xF,0x6,0xB,0x1,0x9,0xC,0x5,0xD,0x3,0x7,0xA,0x0,0xE,0x2,0x4, 0x9,0xB,0xC,0x0,0x3,0x6,0x7,0x5,0x4,0x8,0xE,0xF,0x1,0xA,0x2,0xD, 0xC,0x6,0x5,0x2,0xB,0x0,0x9,0xD,0x3,0xE,0x7,0xA,0xF,0x4,0x1,0x8 }; private static byte[] ESbox_A = { 0x9,0x6,0x3,0x2,0x8,0xB,0x1,0x7,0xA,0x4,0xE,0xF,0xC,0x0,0xD,0x5, 0x3,0x7,0xE,0x9,0x8,0xA,0xF,0x0,0x5,0x2,0x6,0xC,0xB,0x4,0xD,0x1, 0xE,0x4,0x6,0x2,0xB,0x3,0xD,0x8,0xC,0xF,0x5,0xA,0x0,0x7,0x1,0x9, 0xE,0x7,0xA,0xC,0xD,0x1,0x3,0x9,0x0,0x2,0xB,0x4,0xF,0x8,0x5,0x6, 0xB,0x5,0x1,0x9,0x8,0xD,0xF,0x0,0xE,0x4,0x2,0x3,0xC,0x7,0xA,0x6, 0x3,0xA,0xD,0xC,0x1,0x2,0x0,0xB,0x7,0x5,0x9,0x4,0x8,0xF,0xE,0x6, 0x1,0xD,0x2,0x9,0x7,0xA,0x6,0x0,0x8,0xC,0x4,0x5,0xF,0x3,0xB,0xE, 0xB,0xA,0xF,0x5,0x0,0xC,0xE,0x8,0x6,0x2,0x3,0x9,0x1,0x7,0xD,0x4 }; private static byte[] ESbox_B = { 0x8,0x4,0xB,0x1,0x3,0x5,0x0,0x9,0x2,0xE,0xA,0xC,0xD,0x6,0x7,0xF, 0x0,0x1,0x2,0xA,0x4,0xD,0x5,0xC,0x9,0x7,0x3,0xF,0xB,0x8,0x6,0xE, 0xE,0xC,0x0,0xA,0x9,0x2,0xD,0xB,0x7,0x5,0x8,0xF,0x3,0x6,0x1,0x4, 0x7,0x5,0x0,0xD,0xB,0x6,0x1,0x2,0x3,0xA,0xC,0xF,0x4,0xE,0x9,0x8, 0x2,0x7,0xC,0xF,0x9,0x5,0xA,0xB,0x1,0x4,0x0,0xD,0x6,0x8,0xE,0x3, 0x8,0x3,0x2,0x6,0x4,0xD,0xE,0xB,0xC,0x1,0x7,0xF,0xA,0x0,0x9,0x5, 0x5,0x2,0xA,0xB,0x9,0x1,0xC,0x3,0x7,0x4,0xD,0x0,0x6,0xF,0x8,0xE, 0x0,0x4,0xB,0xE,0x8,0x3,0x7,0x1,0xA,0x2,0x9,0x6,0xF,0xD,0x5,0xC }; private static byte[] ESbox_C = { 0x1,0xB,0xC,0x2,0x9,0xD,0x0,0xF,0x4,0x5,0x8,0xE,0xA,0x7,0x6,0x3, 0x0,0x1,0x7,0xD,0xB,0x4,0x5,0x2,0x8,0xE,0xF,0xC,0x9,0xA,0x6,0x3, 0x8,0x2,0x5,0x0,0x4,0x9,0xF,0xA,0x3,0x7,0xC,0xD,0x6,0xE,0x1,0xB, 0x3,0x6,0x0,0x1,0x5,0xD,0xA,0x8,0xB,0x2,0x9,0x7,0xE,0xF,0xC,0x4, 0x8,0xD,0xB,0x0,0x4,0x5,0x1,0x2,0x9,0x3,0xC,0xE,0x6,0xF,0xA,0x7, 0xC,0x9,0xB,0x1,0x8,0xE,0x2,0x4,0x7,0x3,0x6,0x5,0xA,0x0,0xF,0xD, 0xA,0x9,0x6,0x8,0xD,0xE,0x2,0x0,0xF,0x3,0x5,0xB,0x4,0x1,0xC,0x7, 0x7,0x4,0x0,0x5,0xA,0x2,0xF,0xE,0xC,0x6,0x1,0xB,0xD,0x9,0x3,0x8 }; private static byte[] ESbox_D = { 0xF,0xC,0x2,0xA,0x6,0x4,0x5,0x0,0x7,0x9,0xE,0xD,0x1,0xB,0x8,0x3, 0xB,0x6,0x3,0x4,0xC,0xF,0xE,0x2,0x7,0xD,0x8,0x0,0x5,0xA,0x9,0x1, 0x1,0xC,0xB,0x0,0xF,0xE,0x6,0x5,0xA,0xD,0x4,0x8,0x9,0x3,0x7,0x2, 0x1,0x5,0xE,0xC,0xA,0x7,0x0,0xD,0x6,0x2,0xB,0x4,0x9,0x3,0xF,0x8, 0x0,0xC,0x8,0x9,0xD,0x2,0xA,0xB,0x7,0x3,0x6,0x5,0x4,0xE,0xF,0x1, 0x8,0x0,0xF,0x3,0x2,0x5,0xE,0xB,0x1,0xA,0x4,0x7,0xC,0x9,0xD,0x6, 0x3,0x0,0x6,0xF,0x1,0xE,0x9,0x2,0xD,0x8,0xC,0x4,0xB,0xA,0x5,0x7, 0x1,0xA,0x6,0x8,0xF,0xB,0x0,0x4,0xC,0x3,0x5,0x9,0x7,0xD,0x2,0xE }; //S-box for digest private static byte DSbox_Test[] = { 0x4,0xA,0x9,0x2,0xD,0x8,0x0,0xE,0x6,0xB,0x1,0xC,0x7,0xF,0x5,0x3, 0xE,0xB,0x4,0xC,0x6,0xD,0xF,0xA,0x2,0x3,0x8,0x1,0x0,0x7,0x5,0x9, 0x5,0x8,0x1,0xD,0xA,0x3,0x4,0x2,0xE,0xF,0xC,0x7,0x6,0x0,0x9,0xB, 0x7,0xD,0xA,0x1,0x0,0x8,0x9,0xF,0xE,0x4,0x6,0xC,0xB,0x2,0x5,0x3, 0x6,0xC,0x7,0x1,0x5,0xF,0xD,0x8,0x4,0xA,0x9,0xE,0x0,0x3,0xB,0x2, 0x4,0xB,0xA,0x0,0x7,0x2,0x1,0xD,0x3,0x6,0x8,0x5,0x9,0xC,0xF,0xE, 0xD,0xB,0x4,0x1,0x3,0xF,0x5,0x9,0x0,0xA,0xE,0x7,0x6,0x8,0x2,0xC, 0x1,0xF,0xD,0x0,0x5,0x7,0xA,0x4,0x9,0x2,0x3,0xE,0x6,0xB,0x8,0xC }; private static byte DSbox_A[] = { 0xA,0x4,0x5,0x6,0x8,0x1,0x3,0x7,0xD,0xC,0xE,0x0,0x9,0x2,0xB,0xF, 0x5,0xF,0x4,0x0,0x2,0xD,0xB,0x9,0x1,0x7,0x6,0x3,0xC,0xE,0xA,0x8, 0x7,0xF,0xC,0xE,0x9,0x4,0x1,0x0,0x3,0xB,0x5,0x2,0x6,0xA,0x8,0xD, 0x4,0xA,0x7,0xC,0x0,0xF,0x2,0x8,0xE,0x1,0x6,0x5,0xD,0xB,0x9,0x3, 0x7,0x6,0x4,0xB,0x9,0xC,0x2,0xA,0x1,0x8,0x0,0xE,0xF,0xD,0x3,0x5, 0x7,0x6,0x2,0x4,0xD,0x9,0xF,0x0,0xA,0x1,0x5,0xB,0x8,0xE,0xC,0x3, 0xD,0xE,0x4,0x1,0x7,0x0,0x5,0xA,0x3,0xC,0x8,0xF,0x6,0x2,0x9,0xB, 0x1,0x3,0xA,0x9,0x5,0xB,0x4,0xF,0x8,0x6,0x7,0xE,0xD,0x0,0x2,0xC }; // // pre-defined sbox table // private static Hashtable sBoxes = new Hashtable(); static { sBoxes.put("E-TEST", ESbox_Test); sBoxes.put("E-A", ESbox_A); sBoxes.put("E-B", ESbox_B); sBoxes.put("E-C", ESbox_C); sBoxes.put("E-D", ESbox_D); sBoxes.put("D-TEST", DSbox_Test); sBoxes.put("D-A", DSbox_A); } /** * standard constructor. */ public GOST28147Engine() { } /** * initialise an GOST28147 cipher. * * @param forEncryption whether or not we are for encryption. * @param params the parameters required to set up the cipher. * @exception IllegalArgumentException if the params argument is * inappropriate. */ public void init( boolean forEncryption, CipherParameters params) { if (params instanceof ParametersWithSBox) { ParametersWithSBox param = (ParametersWithSBox)params; // // Set the S-Box // System.arraycopy(param.getSBox(), 0, this.S, 0, param.getSBox().length); // // set key if there is one // if (param.getParameters() != null) { workingKey = generateWorkingKey(forEncryption, ((KeyParameter)param.getParameters()).getKey()); } } else if (params instanceof KeyParameter) { workingKey = generateWorkingKey(forEncryption, ((KeyParameter)params).getKey()); } else { throw new IllegalArgumentException("invalid parameter passed to GOST28147 init - " + params.getClass().getName()); } } public String getAlgorithmName() { return "GOST28147"; } public int getBlockSize() { return BLOCK_SIZE; } public int processBlock( byte[] in, int inOff, byte[] out, int outOff) { if (workingKey == null) { throw new IllegalStateException("GOST28147 engine not initialised"); } if ((inOff + BLOCK_SIZE) > in.length) { throw new DataLengthException("input buffer too short"); } if ((outOff + BLOCK_SIZE) > out.length) { throw new DataLengthException("output buffer too short"); } GOST28147Func(workingKey, in, inOff, out, outOff); return BLOCK_SIZE; } public void reset() { } private int[] generateWorkingKey( boolean forEncryption, byte[] userKey) { this.forEncryption = forEncryption; if (userKey.length != 32) { throw new IllegalArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!"); } int key[] = new int[8]; for(int i=0; i!=8; i++) { key[i] = bytesToint(userKey,i*4); } return key; } private int GOST28147_mainStep(int n1, int key) { int cm = (key + n1); // CM1 // S-box replacing int om = S[ 0 + ((cm >> (0 * 4)) & 0xF)] << (0 * 4); om += S[ 16 + ((cm >> (1 * 4)) & 0xF)] << (1 * 4); om += S[ 32 + ((cm >> (2 * 4)) & 0xF)] << (2 * 4); om += S[ 48 + ((cm >> (3 * 4)) & 0xF)] << (3 * 4); om += S[ 64 + ((cm >> (4 * 4)) & 0xF)] << (4 * 4); om += S[ 80 + ((cm >> (5 * 4)) & 0xF)] << (5 * 4); om += S[ 96 + ((cm >> (6 * 4)) & 0xF)] << (6 * 4); om += S[112 + ((cm >> (7 * 4)) & 0xF)] << (7 * 4); return om << 11 | om >>> (32-11); // 11-leftshift } private void GOST28147Func( int[] workingKey, byte[] in, int inOff, byte[] out, int outOff) { int N1, N2, tmp; //tmp -> for saving N1 N1 = bytesToint(in, inOff); N2 = bytesToint(in, inOff + 4); if (this.forEncryption) { for(int k = 0; k < 3; k++) // 1-24 steps { for(int j = 0; j < 8; j++) { tmp = N1; N1 = N2 ^ GOST28147_mainStep(N1, workingKey[j]); // CM2 N2 = tmp; } } for(int j = 7; j > 0; j--) // 25-31 steps { tmp = N1; N1 = N2 ^ GOST28147_mainStep(N1, workingKey[j]); // CM2 N2 = tmp; } } else //decrypt { for(int j = 0; j < 8; j++) // 1-8 steps { tmp = N1; N1 = N2 ^ GOST28147_mainStep(N1, workingKey[j]); // CM2 N2 = tmp; } for(int k = 0; k < 3; k++) //9-31 steps { for(int j = 7; j >= 0; j--) { if ((k == 2) && (j==0)) { break; // break 32 step } tmp = N1; N1 = N2 ^ GOST28147_mainStep(N1, workingKey[j]); // CM2 N2 = tmp; } } } N2 = N2 ^ GOST28147_mainStep(N1, workingKey[0]); // 32 step (N1=N1) intTobytes(N1, out, outOff); intTobytes(N2, out, outOff + 4); } //array of bytes to type int private int bytesToint( byte[] in, int inOff) { return ((in[inOff + 3] << 24) & 0xff000000) + ((in[inOff + 2] << 16) & 0xff0000) + ((in[inOff + 1] << 8) & 0xff00) + (in[inOff] & 0xff); } //int to array of bytes private void intTobytes( int num, byte[] out, int outOff) { out[outOff + 3] = (byte)(num >>> 24); out[outOff + 2] = (byte)(num >>> 16); out[outOff + 1] = (byte)(num >>> 8); out[outOff] = (byte)num; } /** * Return the S-Box associated with SBoxName * @param sBoxName name of the S-Box * @return byte array representing the S-Box */ public static byte[] getSBox( String sBoxName) { byte[] namedSBox = (byte[])sBoxes.get(sBoxName.toUpperCase()); if (namedSBox != null) { byte[] sBox = new byte[namedSBox.length]; System.arraycopy(namedSBox, 0, sBox, 0, sBox.length); return sBox; } else { throw new IllegalArgumentException("Unknown S-Box - possible types: " + "\"E-Test\", \"E-A\", \"E-B\", \"E-C\", \"E-D\", \"D-Test\", \"D-A\"."); } }}?? 快捷鍵說明
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