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https://github.com/moparisthebest/keepass2android
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642 lines
22 KiB
C#
642 lines
22 KiB
C#
/*
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A C# implementation of the Twofish cipher
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By Shaun Wilde
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An article on integrating a C# implementation of the Twofish cipher into the
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.NET framework.
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http://www.codeproject.com/KB/recipes/twofish_csharp.aspx
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The Code Project Open License (CPOL) 1.02
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http://www.codeproject.com/info/cpol10.aspx
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Download a copy of the CPOL.
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http://www.codeproject.com/info/CPOL.zip
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*/
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//#define FEISTEL
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using System;
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using System.Diagnostics;
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using System.Security.Cryptography;
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namespace TwofishCipher.Crypto
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{
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/// <summary>
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/// Summary description for TwofishBase.
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/// </summary>
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internal class TwofishBase
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{
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public enum EncryptionDirection
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{
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Encrypting,
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Decrypting
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}
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public TwofishBase()
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{
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}
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protected int inputBlockSize = BLOCK_SIZE/8;
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protected int outputBlockSize = BLOCK_SIZE/8;
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/*
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+*****************************************************************************
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*
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* Function Name: f32
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*
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* Function: Run four bytes through keyed S-boxes and apply MDS matrix
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*
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* Arguments: x = input to f function
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* k32 = pointer to key dwords
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* keyLen = total key length (k32 --> keyLey/2 bits)
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*
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* Return: The output of the keyed permutation applied to x.
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*
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* Notes:
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* This function is a keyed 32-bit permutation. It is the major building
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* block for the Twofish round function, including the four keyed 8x8
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* permutations and the 4x4 MDS matrix multiply. This function is used
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* both for generating round subkeys and within the round function on the
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* block being encrypted.
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*
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* This version is fairly slow and pedagogical, although a smartcard would
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* probably perform the operation exactly this way in firmware. For
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* ultimate performance, the entire operation can be completed with four
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* lookups into four 256x32-bit tables, with three dword xors.
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*
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* The MDS matrix is defined in TABLE.H. To multiply by Mij, just use the
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* macro Mij(x).
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*
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-****************************************************************************/
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private static uint f32(uint x,ref uint[] k32,int keyLen)
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{
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byte[] b = {b0(x),b1(x),b2(x),b3(x)};
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/* Run each byte thru 8x8 S-boxes, xoring with key byte at each stage. */
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/* Note that each byte goes through a different combination of S-boxes.*/
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//*((DWORD *)b) = Bswap(x); /* make b[0] = LSB, b[3] = MSB */
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switch (((keyLen + 63)/64) & 3)
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{
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case 0: /* 256 bits of key */
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b[0] = (byte)(P8x8[P_04,b[0]] ^ b0(k32[3]));
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b[1] = (byte)(P8x8[P_14,b[1]] ^ b1(k32[3]));
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b[2] = (byte)(P8x8[P_24,b[2]] ^ b2(k32[3]));
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b[3] = (byte)(P8x8[P_34,b[3]] ^ b3(k32[3]));
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/* fall thru, having pre-processed b[0]..b[3] with k32[3] */
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goto case 3;
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case 3: /* 192 bits of key */
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b[0] = (byte)(P8x8[P_03,b[0]] ^ b0(k32[2]));
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b[1] = (byte)(P8x8[P_13,b[1]] ^ b1(k32[2]));
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b[2] = (byte)(P8x8[P_23,b[2]] ^ b2(k32[2]));
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b[3] = (byte)(P8x8[P_33,b[3]] ^ b3(k32[2]));
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/* fall thru, having pre-processed b[0]..b[3] with k32[2] */
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goto case 2;
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case 2: /* 128 bits of key */
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b[0] = P8x8[P_00, P8x8[P_01, P8x8[P_02, b[0]] ^ b0(k32[1])] ^ b0(k32[0])];
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b[1] = P8x8[P_10, P8x8[P_11, P8x8[P_12, b[1]] ^ b1(k32[1])] ^ b1(k32[0])];
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b[2] = P8x8[P_20, P8x8[P_21, P8x8[P_22, b[2]] ^ b2(k32[1])] ^ b2(k32[0])];
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b[3] = P8x8[P_30, P8x8[P_31, P8x8[P_32, b[3]] ^ b3(k32[1])] ^ b3(k32[0])];
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break;
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}
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/* Now perform the MDS matrix multiply inline. */
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return (uint)((M00(b[0]) ^ M01(b[1]) ^ M02(b[2]) ^ M03(b[3]))) ^
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(uint)((M10(b[0]) ^ M11(b[1]) ^ M12(b[2]) ^ M13(b[3])) << 8) ^
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(uint)((M20(b[0]) ^ M21(b[1]) ^ M22(b[2]) ^ M23(b[3])) << 16) ^
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(uint)((M30(b[0]) ^ M31(b[1]) ^ M32(b[2]) ^ M33(b[3])) << 24) ;
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}
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/*
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+*****************************************************************************
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*
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* Function Name: reKey
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*
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* Function: Initialize the Twofish key schedule from key32
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*
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* Arguments: key = ptr to keyInstance to be initialized
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*
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* Return: TRUE on success
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*
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* Notes:
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* Here we precompute all the round subkeys, although that is not actually
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* required. For example, on a smartcard, the round subkeys can
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* be generated on-the-fly using f32()
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*
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-****************************************************************************/
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protected bool reKey(int keyLen, ref uint[] key32)
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{
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int i,k64Cnt;
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keyLength = keyLen;
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rounds = numRounds[(keyLen-1)/64];
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int subkeyCnt = ROUND_SUBKEYS + 2*rounds;
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uint A,B;
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uint[] k32e = new uint[MAX_KEY_BITS/64];
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uint[] k32o = new uint[MAX_KEY_BITS/64]; /* even/odd key dwords */
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k64Cnt=(keyLen+63)/64; /* round up to next multiple of 64 bits */
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for (i=0;i<k64Cnt;i++)
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{ /* split into even/odd key dwords */
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k32e[i]=key32[2*i ];
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k32o[i]=key32[2*i+1];
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/* compute S-box keys using (12,8) Reed-Solomon code over GF(256) */
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sboxKeys[k64Cnt-1-i]=RS_MDS_Encode(k32e[i],k32o[i]); /* reverse order */
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}
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for (i=0;i<subkeyCnt/2;i++) /* compute round subkeys for PHT */
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{
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A = f32((uint)(i*SK_STEP) ,ref k32e, keyLen); /* A uses even key dwords */
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B = f32((uint)(i*SK_STEP+SK_BUMP),ref k32o, keyLen); /* B uses odd key dwords */
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B = ROL(B,8);
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subKeys[2*i ] = A+ B; /* combine with a PHT */
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subKeys[2*i+1] = ROL(A+2*B,SK_ROTL);
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}
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return true;
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}
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protected void blockDecrypt(ref uint[] x)
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{
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uint t0,t1;
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uint[] xtemp = new uint[4];
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if (cipherMode == CipherMode.CBC)
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{
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x.CopyTo(xtemp,0);
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}
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for (int i=0;i<BLOCK_SIZE/32;i++) /* copy in the block, add whitening */
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x[i] ^= subKeys[OUTPUT_WHITEN+i];
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for (int r=rounds-1;r>=0;r--) /* main Twofish decryption loop */
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{
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t0 = f32( x[0] ,ref sboxKeys,keyLength);
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t1 = f32(ROL(x[1],8),ref sboxKeys,keyLength);
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x[2] = ROL(x[2],1);
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x[2]^= t0 + t1 + subKeys[ROUND_SUBKEYS+2*r ]; /* PHT, round keys */
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x[3]^= t0 + 2*t1 + subKeys[ROUND_SUBKEYS+2*r+1];
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x[3] = ROR(x[3],1);
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if (r>0) /* unswap, except for last round */
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{
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t0 = x[0]; x[0]= x[2]; x[2] = t0;
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t1 = x[1]; x[1]= x[3]; x[3] = t1;
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}
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}
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for (int i=0;i<BLOCK_SIZE/32;i++) /* copy out, with whitening */
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{
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x[i] ^= subKeys[INPUT_WHITEN+i];
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if (cipherMode == CipherMode.CBC)
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{
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x[i] ^= IV[i];
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IV[i] = xtemp[i];
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}
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}
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}
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protected void blockEncrypt(ref uint[] x)
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{
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uint t0,t1,tmp;
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for (int i=0;i<BLOCK_SIZE/32;i++) /* copy in the block, add whitening */
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{
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x[i] ^= subKeys[INPUT_WHITEN+i];
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if (cipherMode == CipherMode.CBC)
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x[i] ^= IV[i];
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}
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for (int r=0;r<rounds;r++) /* main Twofish encryption loop */ // 16==rounds
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{
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#if FEISTEL
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t0 = f32(ROR(x[0], (r+1)/2),ref sboxKeys,keyLength);
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t1 = f32(ROL(x[1],8+(r+1)/2),ref sboxKeys,keyLength);
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/* PHT, round keys */
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x[2]^= ROL(t0 + t1 + subKeys[ROUND_SUBKEYS+2*r ], r /2);
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x[3]^= ROR(t0 + 2*t1 + subKeys[ROUND_SUBKEYS+2*r+1],(r+2) /2);
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#else
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t0 = f32( x[0] ,ref sboxKeys,keyLength);
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t1 = f32(ROL(x[1],8),ref sboxKeys,keyLength);
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x[3] = ROL(x[3],1);
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x[2]^= t0 + t1 + subKeys[ROUND_SUBKEYS+2*r ]; /* PHT, round keys */
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x[3]^= t0 + 2*t1 + subKeys[ROUND_SUBKEYS+2*r+1];
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x[2] = ROR(x[2],1);
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#endif
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if (r < rounds-1) /* swap for next round */
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{
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tmp = x[0]; x[0]= x[2]; x[2] = tmp;
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tmp = x[1]; x[1]= x[3]; x[3] = tmp;
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}
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}
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#if FEISTEL
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x[0] = ROR(x[0],8); /* "final permutation" */
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x[1] = ROL(x[1],8);
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x[2] = ROR(x[2],8);
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x[3] = ROL(x[3],8);
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#endif
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for (int i=0;i<BLOCK_SIZE/32;i++) /* copy out, with whitening */
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{
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x[i] ^= subKeys[OUTPUT_WHITEN+i];
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if (cipherMode == CipherMode.CBC)
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{
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IV[i] = x[i];
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}
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}
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}
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private int[] numRounds = {0,ROUNDS_128,ROUNDS_192,ROUNDS_256};
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/*
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+*****************************************************************************
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*
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* Function Name: RS_MDS_Encode
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*
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* Function: Use (12,8) Reed-Solomon code over GF(256) to produce
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* a key S-box dword from two key material dwords.
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*
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* Arguments: k0 = 1st dword
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* k1 = 2nd dword
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*
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* Return: Remainder polynomial generated using RS code
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*
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* Notes:
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* Since this computation is done only once per reKey per 64 bits of key,
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* the performance impact of this routine is imperceptible. The RS code
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* chosen has "simple" coefficients to allow smartcard/hardware implementation
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* without lookup tables.
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*
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-****************************************************************************/
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static private uint RS_MDS_Encode(uint k0,uint k1)
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{
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uint i,j;
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uint r;
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for (i=r=0;i<2;i++)
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{
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r ^= (i>0) ? k0 : k1; /* merge in 32 more key bits */
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for (j=0;j<4;j++) /* shift one byte at a time */
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RS_rem(ref r);
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}
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return r;
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}
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protected uint[] sboxKeys = new uint[MAX_KEY_BITS/64]; /* key bits used for S-boxes */
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protected uint[] subKeys = new uint[TOTAL_SUBKEYS]; /* round subkeys, input/output whitening bits */
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protected uint[] Key = {0,0,0,0,0,0,0,0}; //new int[MAX_KEY_BITS/32];
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protected uint[] IV = {0,0,0,0}; // this should be one block size
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private int keyLength;
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private int rounds;
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protected CipherMode cipherMode = CipherMode.ECB;
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#region These are all the definitions that were found in AES.H
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static private readonly int BLOCK_SIZE = 128; /* number of bits per block */
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static private readonly int MAX_ROUNDS = 16; /* max # rounds (for allocating subkey array) */
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static private readonly int ROUNDS_128 = 16; /* default number of rounds for 128-bit keys*/
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static private readonly int ROUNDS_192 = 16; /* default number of rounds for 192-bit keys*/
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static private readonly int ROUNDS_256 = 16; /* default number of rounds for 256-bit keys*/
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static private readonly int MAX_KEY_BITS = 256; /* max number of bits of key */
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// static private readonly int MIN_KEY_BITS = 128; /* min number of bits of key (zero pad) */
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//#define VALID_SIG 0x48534946 /* initialization signature ('FISH') */
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//#define MCT_OUTER 400 /* MCT outer loop */
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//#define MCT_INNER 10000 /* MCT inner loop */
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//#define REENTRANT 1 /* nonzero forces reentrant code (slightly slower) */
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static private readonly int INPUT_WHITEN = 0; /* subkey array indices */
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static private readonly int OUTPUT_WHITEN = (INPUT_WHITEN + BLOCK_SIZE/32);
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static private readonly int ROUND_SUBKEYS = (OUTPUT_WHITEN + BLOCK_SIZE/32); /* use 2 * (# rounds) */
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static private readonly int TOTAL_SUBKEYS = (ROUND_SUBKEYS + 2*MAX_ROUNDS);
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#endregion
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#region These are all the definitions that were found in TABLE.H that we need
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/* for computing subkeys */
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static private readonly uint SK_STEP = 0x02020202u;
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static private readonly uint SK_BUMP = 0x01010101u;
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static private readonly int SK_ROTL = 9;
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/* Reed-Solomon code parameters: (12,8) reversible code
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g(x) = x**4 + (a + 1/a) x**3 + a x**2 + (a + 1/a) x + 1
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where a = primitive root of field generator 0x14D */
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static private readonly uint RS_GF_FDBK = 0x14D; /* field generator */
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static private void RS_rem(ref uint x)
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{
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byte b = (byte) (x >> 24);
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// TODO: maybe change g2 and g3 to bytes
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uint g2 = (uint)(((b << 1) ^ (((b & 0x80)==0x80) ? RS_GF_FDBK : 0 )) & 0xFF);
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uint g3 = (uint)(((b >> 1) & 0x7F) ^ (((b & 1)==1) ? RS_GF_FDBK >> 1 : 0 ) ^ g2) ;
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x = (x << 8) ^ (g3 << 24) ^ (g2 << 16) ^ (g3 << 8) ^ b;
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}
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/* Macros for the MDS matrix
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* The MDS matrix is (using primitive polynomial 169):
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* 01 EF 5B 5B
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* 5B EF EF 01
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* EF 5B 01 EF
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* EF 01 EF 5B
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*----------------------------------------------------------------
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* More statistical properties of this matrix (from MDS.EXE output):
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*
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* Min Hamming weight (one byte difference) = 8. Max=26. Total = 1020.
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* Prob[8]: 7 23 42 20 52 95 88 94 121 128 91
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* 102 76 41 24 8 4 1 3 0 0 0
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* Runs[8]: 2 4 5 6 7 8 9 11
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* MSBs[8]: 1 4 15 8 18 38 40 43
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* HW= 8: 05040705 0A080E0A 14101C14 28203828 50407050 01499101 A080E0A0
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* HW= 9: 04050707 080A0E0E 10141C1C 20283838 40507070 80A0E0E0 C6432020 07070504
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* 0E0E0A08 1C1C1410 38382820 70705040 E0E0A080 202043C6 05070407 0A0E080E
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* 141C101C 28382038 50704070 A0E080E0 4320C620 02924B02 089A4508
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* Min Hamming weight (two byte difference) = 3. Max=28. Total = 390150.
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* Prob[3]: 7 18 55 149 270 914 2185 5761 11363 20719 32079
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* 43492 51612 53851 52098 42015 31117 20854 11538 6223 2492 1033
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* MDS OK, ROR: 6+ 7+ 8+ 9+ 10+ 11+ 12+ 13+ 14+ 15+ 16+
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* 17+ 18+ 19+ 20+ 21+ 22+ 23+ 24+ 25+ 26+
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*/
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static private readonly int MDS_GF_FDBK = 0x169; /* primitive polynomial for GF(256)*/
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static private int LFSR1(int x)
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{
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return ( ((x) >> 1) ^ ((((x) & 0x01)==0x01) ? MDS_GF_FDBK/2 : 0));
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}
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static private int LFSR2(int x)
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{
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return ( ((x) >> 2) ^ ((((x) & 0x02)==0x02) ? MDS_GF_FDBK/2 : 0) ^
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((((x) & 0x01)==0x01) ? MDS_GF_FDBK/4 : 0));
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}
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// TODO: not the most efficient use of code but it allows us to update the code a lot quicker we can possibly optimize this code once we have got it all working
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static private int Mx_1(int x)
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{
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return x; /* force result to int so << will work */
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}
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static private int Mx_X(int x)
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{
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return x ^ LFSR2(x); /* 5B */
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}
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static private int Mx_Y(int x)
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{
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return x ^ LFSR1(x) ^ LFSR2(x); /* EF */
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}
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static private int M00(int x)
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{
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return Mul_1(x);
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}
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static private int M01(int x)
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{
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return Mul_Y(x);
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}
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static private int M02(int x)
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{
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return Mul_X(x);
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}
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static private int M03(int x)
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{
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return Mul_X(x);
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}
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static private int M10(int x)
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{
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return Mul_X(x);
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}
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static private int M11(int x)
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{
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return Mul_Y(x);
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}
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static private int M12(int x)
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{
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return Mul_Y(x);
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}
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static private int M13(int x)
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{
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return Mul_1(x);
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}
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static private int M20(int x)
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{
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return Mul_Y(x);
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}
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static private int M21(int x)
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{
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return Mul_X(x);
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}
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static private int M22(int x)
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{
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return Mul_1(x);
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}
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static private int M23(int x)
|
|
{
|
|
return Mul_Y(x);
|
|
}
|
|
|
|
static private int M30(int x)
|
|
{
|
|
return Mul_Y(x);
|
|
}
|
|
static private int M31(int x)
|
|
{
|
|
return Mul_1(x);
|
|
}
|
|
static private int M32(int x)
|
|
{
|
|
return Mul_Y(x);
|
|
}
|
|
static private int M33(int x)
|
|
{
|
|
return Mul_X(x);
|
|
}
|
|
|
|
static private int Mul_1(int x)
|
|
{
|
|
return Mx_1(x);
|
|
}
|
|
static private int Mul_X(int x)
|
|
{
|
|
return Mx_X(x);
|
|
}
|
|
static private int Mul_Y(int x)
|
|
{
|
|
return Mx_Y(x);
|
|
}
|
|
/* Define the fixed p0/p1 permutations used in keyed S-box lookup.
|
|
By changing the following constant definitions for P_ij, the S-boxes will
|
|
automatically get changed in all the Twofish source code. Note that P_i0 is
|
|
the "outermost" 8x8 permutation applied. See the f32() function to see
|
|
how these constants are to be used.
|
|
*/
|
|
static private readonly int P_00 = 1; /* "outermost" permutation */
|
|
static private readonly int P_01 = 0;
|
|
static private readonly int P_02 = 0;
|
|
static private readonly int P_03 = (P_01^1); /* "extend" to larger key sizes */
|
|
static private readonly int P_04 = 1;
|
|
|
|
static private readonly int P_10 = 0;
|
|
static private readonly int P_11 = 0;
|
|
static private readonly int P_12 = 1;
|
|
static private readonly int P_13 = (P_11^1);
|
|
static private readonly int P_14 = 0;
|
|
|
|
static private readonly int P_20 = 1;
|
|
static private readonly int P_21 = 1;
|
|
static private readonly int P_22 = 0;
|
|
static private readonly int P_23 = (P_21^1);
|
|
static private readonly int P_24 = 0;
|
|
|
|
static private readonly int P_30 = 0;
|
|
static private readonly int P_31 = 1;
|
|
static private readonly int P_32 = 1;
|
|
static private readonly int P_33 = (P_31^1);
|
|
static private readonly int P_34 = 1;
|
|
|
|
/* fixed 8x8 permutation S-boxes */
|
|
|
|
/***********************************************************************
|
|
* 07:07:14 05/30/98 [4x4] TestCnt=256. keySize=128. CRC=4BD14D9E.
|
|
* maxKeyed: dpMax = 18. lpMax =100. fixPt = 8. skXor = 0. skDup = 6.
|
|
* log2(dpMax[ 6..18])= --- 15.42 1.33 0.89 4.05 7.98 12.05
|
|
* log2(lpMax[ 7..12])= 9.32 1.01 1.16 4.23 8.02 12.45
|
|
* log2(fixPt[ 0.. 8])= 1.44 1.44 2.44 4.06 6.01 8.21 11.07 14.09 17.00
|
|
* log2(skXor[ 0.. 0])
|
|
* log2(skDup[ 0.. 6])= --- 2.37 0.44 3.94 8.36 13.04 17.99
|
|
***********************************************************************/
|
|
static private byte[,] P8x8 =
|
|
{
|
|
/* p0: */
|
|
/* dpMax = 10. lpMax = 64. cycleCnt= 1 1 1 0. */
|
|
/* 817D6F320B59ECA4.ECB81235F4A6709D.BA5E6D90C8F32471.D7F4126E9B3085CA. */
|
|
/* Karnaugh maps:
|
|
* 0111 0001 0011 1010. 0001 1001 1100 1111. 1001 1110 0011 1110. 1101 0101 1111 1001.
|
|
* 0101 1111 1100 0100. 1011 0101 0010 0000. 0101 1000 1100 0101. 1000 0111 0011 0010.
|
|
* 0000 1001 1110 1101. 1011 1000 1010 0011. 0011 1001 0101 0000. 0100 0010 0101 1011.
|
|
* 0111 0100 0001 0110. 1000 1011 1110 1001. 0011 0011 1001 1101. 1101 0101 0000 1100.
|
|
*/
|
|
{
|
|
0xA9, 0x67, 0xB3, 0xE8, 0x04, 0xFD, 0xA3, 0x76,
|
|
0x9A, 0x92, 0x80, 0x78, 0xE4, 0xDD, 0xD1, 0x38,
|
|
0x0D, 0xC6, 0x35, 0x98, 0x18, 0xF7, 0xEC, 0x6C,
|
|
0x43, 0x75, 0x37, 0x26, 0xFA, 0x13, 0x94, 0x48,
|
|
0xF2, 0xD0, 0x8B, 0x30, 0x84, 0x54, 0xDF, 0x23,
|
|
0x19, 0x5B, 0x3D, 0x59, 0xF3, 0xAE, 0xA2, 0x82,
|
|
0x63, 0x01, 0x83, 0x2E, 0xD9, 0x51, 0x9B, 0x7C,
|
|
0xA6, 0xEB, 0xA5, 0xBE, 0x16, 0x0C, 0xE3, 0x61,
|
|
0xC0, 0x8C, 0x3A, 0xF5, 0x73, 0x2C, 0x25, 0x0B,
|
|
0xBB, 0x4E, 0x89, 0x6B, 0x53, 0x6A, 0xB4, 0xF1,
|
|
0xE1, 0xE6, 0xBD, 0x45, 0xE2, 0xF4, 0xB6, 0x66,
|
|
0xCC, 0x95, 0x03, 0x56, 0xD4, 0x1C, 0x1E, 0xD7,
|
|
0xFB, 0xC3, 0x8E, 0xB5, 0xE9, 0xCF, 0xBF, 0xBA,
|
|
0xEA, 0x77, 0x39, 0xAF, 0x33, 0xC9, 0x62, 0x71,
|
|
0x81, 0x79, 0x09, 0xAD, 0x24, 0xCD, 0xF9, 0xD8,
|
|
0xE5, 0xC5, 0xB9, 0x4D, 0x44, 0x08, 0x86, 0xE7,
|
|
0xA1, 0x1D, 0xAA, 0xED, 0x06, 0x70, 0xB2, 0xD2,
|
|
0x41, 0x7B, 0xA0, 0x11, 0x31, 0xC2, 0x27, 0x90,
|
|
0x20, 0xF6, 0x60, 0xFF, 0x96, 0x5C, 0xB1, 0xAB,
|
|
0x9E, 0x9C, 0x52, 0x1B, 0x5F, 0x93, 0x0A, 0xEF,
|
|
0x91, 0x85, 0x49, 0xEE, 0x2D, 0x4F, 0x8F, 0x3B,
|
|
0x47, 0x87, 0x6D, 0x46, 0xD6, 0x3E, 0x69, 0x64,
|
|
0x2A, 0xCE, 0xCB, 0x2F, 0xFC, 0x97, 0x05, 0x7A,
|
|
0xAC, 0x7F, 0xD5, 0x1A, 0x4B, 0x0E, 0xA7, 0x5A,
|
|
0x28, 0x14, 0x3F, 0x29, 0x88, 0x3C, 0x4C, 0x02,
|
|
0xB8, 0xDA, 0xB0, 0x17, 0x55, 0x1F, 0x8A, 0x7D,
|
|
0x57, 0xC7, 0x8D, 0x74, 0xB7, 0xC4, 0x9F, 0x72,
|
|
0x7E, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34,
|
|
0x6E, 0x50, 0xDE, 0x68, 0x65, 0xBC, 0xDB, 0xF8,
|
|
0xC8, 0xA8, 0x2B, 0x40, 0xDC, 0xFE, 0x32, 0xA4,
|
|
0xCA, 0x10, 0x21, 0xF0, 0xD3, 0x5D, 0x0F, 0x00,
|
|
0x6F, 0x9D, 0x36, 0x42, 0x4A, 0x5E, 0xC1, 0xE0
|
|
},
|
|
/* p1: */
|
|
/* dpMax = 10. lpMax = 64. cycleCnt= 2 0 0 1. */
|
|
/* 28BDF76E31940AC5.1E2B4C376DA5F908.4C75169A0ED82B3F.B951C3DE647F208A. */
|
|
/* Karnaugh maps:
|
|
* 0011 1001 0010 0111. 1010 0111 0100 0110. 0011 0001 1111 0100. 1111 1000 0001 1100.
|
|
* 1100 1111 1111 1010. 0011 0011 1110 0100. 1001 0110 0100 0011. 0101 0110 1011 1011.
|
|
* 0010 0100 0011 0101. 1100 1000 1000 1110. 0111 1111 0010 0110. 0000 1010 0000 0011.
|
|
* 1101 1000 0010 0001. 0110 1001 1110 0101. 0001 0100 0101 0111. 0011 1011 1111 0010.
|
|
*/
|
|
{
|
|
0x75, 0xF3, 0xC6, 0xF4, 0xDB, 0x7B, 0xFB, 0xC8,
|
|
0x4A, 0xD3, 0xE6, 0x6B, 0x45, 0x7D, 0xE8, 0x4B,
|
|
0xD6, 0x32, 0xD8, 0xFD, 0x37, 0x71, 0xF1, 0xE1,
|
|
0x30, 0x0F, 0xF8, 0x1B, 0x87, 0xFA, 0x06, 0x3F,
|
|
0x5E, 0xBA, 0xAE, 0x5B, 0x8A, 0x00, 0xBC, 0x9D,
|
|
0x6D, 0xC1, 0xB1, 0x0E, 0x80, 0x5D, 0xD2, 0xD5,
|
|
0xA0, 0x84, 0x07, 0x14, 0xB5, 0x90, 0x2C, 0xA3,
|
|
0xB2, 0x73, 0x4C, 0x54, 0x92, 0x74, 0x36, 0x51,
|
|
0x38, 0xB0, 0xBD, 0x5A, 0xFC, 0x60, 0x62, 0x96,
|
|
0x6C, 0x42, 0xF7, 0x10, 0x7C, 0x28, 0x27, 0x8C,
|
|
0x13, 0x95, 0x9C, 0xC7, 0x24, 0x46, 0x3B, 0x70,
|
|
0xCA, 0xE3, 0x85, 0xCB, 0x11, 0xD0, 0x93, 0xB8,
|
|
0xA6, 0x83, 0x20, 0xFF, 0x9F, 0x77, 0xC3, 0xCC,
|
|
0x03, 0x6F, 0x08, 0xBF, 0x40, 0xE7, 0x2B, 0xE2,
|
|
0x79, 0x0C, 0xAA, 0x82, 0x41, 0x3A, 0xEA, 0xB9,
|
|
0xE4, 0x9A, 0xA4, 0x97, 0x7E, 0xDA, 0x7A, 0x17,
|
|
0x66, 0x94, 0xA1, 0x1D, 0x3D, 0xF0, 0xDE, 0xB3,
|
|
0x0B, 0x72, 0xA7, 0x1C, 0xEF, 0xD1, 0x53, 0x3E,
|
|
0x8F, 0x33, 0x26, 0x5F, 0xEC, 0x76, 0x2A, 0x49,
|
|
0x81, 0x88, 0xEE, 0x21, 0xC4, 0x1A, 0xEB, 0xD9,
|
|
0xC5, 0x39, 0x99, 0xCD, 0xAD, 0x31, 0x8B, 0x01,
|
|
0x18, 0x23, 0xDD, 0x1F, 0x4E, 0x2D, 0xF9, 0x48,
|
|
0x4F, 0xF2, 0x65, 0x8E, 0x78, 0x5C, 0x58, 0x19,
|
|
0x8D, 0xE5, 0x98, 0x57, 0x67, 0x7F, 0x05, 0x64,
|
|
0xAF, 0x63, 0xB6, 0xFE, 0xF5, 0xB7, 0x3C, 0xA5,
|
|
0xCE, 0xE9, 0x68, 0x44, 0xE0, 0x4D, 0x43, 0x69,
|
|
0x29, 0x2E, 0xAC, 0x15, 0x59, 0xA8, 0x0A, 0x9E,
|
|
0x6E, 0x47, 0xDF, 0x34, 0x35, 0x6A, 0xCF, 0xDC,
|
|
0x22, 0xC9, 0xC0, 0x9B, 0x89, 0xD4, 0xED, 0xAB,
|
|
0x12, 0xA2, 0x0D, 0x52, 0xBB, 0x02, 0x2F, 0xA9,
|
|
0xD7, 0x61, 0x1E, 0xB4, 0x50, 0x04, 0xF6, 0xC2,
|
|
0x16, 0x25, 0x86, 0x56, 0x55, 0x09, 0xBE, 0x91
|
|
}
|
|
};
|
|
#endregion
|
|
|
|
#region These are all the definitions that were found in PLATFORM.H that we need
|
|
// left rotation
|
|
private static uint ROL(uint x, int n)
|
|
{
|
|
return ( ((x) << ((n) & 0x1F)) | (x) >> (32-((n) & 0x1F)) );
|
|
}
|
|
|
|
// right rotation
|
|
private static uint ROR(uint x,int n)
|
|
{
|
|
return (((x) >> ((n) & 0x1F)) | ((x) << (32-((n) & 0x1F))));
|
|
}
|
|
|
|
// first byte
|
|
protected static byte b0(uint x)
|
|
{
|
|
return (byte)(x );//& 0xFF);
|
|
}
|
|
// second byte
|
|
protected static byte b1(uint x)
|
|
{
|
|
return (byte)((x >> 8));// & (0xFF));
|
|
}
|
|
// third byte
|
|
protected static byte b2(uint x)
|
|
{
|
|
return (byte)((x >> 16));// & (0xFF));
|
|
}
|
|
// fourth byte
|
|
protected static byte b3(uint x)
|
|
{
|
|
return (byte)((x >> 24));// & (0xFF));
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|