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479 lines
18 KiB
479 lines
18 KiB
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR) |
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#pragma warning disable |
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using System; |
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters; |
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Utilities; |
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities; |
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines |
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{ |
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/// <remarks>A class that provides a basic DES engine.</remarks> |
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public class DesEngine |
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: IBlockCipher |
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{ |
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internal const int BLOCK_SIZE = 8; |
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private int[] workingKey; |
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public virtual int[] GetWorkingKey() |
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{ |
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return workingKey; |
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} |
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|
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/** |
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* initialise a DES cipher. |
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* |
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* @param forEncryption whether or not we are for encryption. |
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* @param parameters the parameters required to set up the cipher. |
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* @exception ArgumentException if the parameters argument is |
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* inappropriate. |
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*/ |
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public virtual void Init( |
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bool forEncryption, |
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ICipherParameters parameters) |
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{ |
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if (!(parameters is KeyParameter)) |
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throw new ArgumentException("invalid parameter passed to DES init - " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(parameters)); |
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workingKey = GenerateWorkingKey(forEncryption, ((KeyParameter)parameters).GetKey()); |
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} |
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public virtual string AlgorithmName |
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{ |
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get { return "DES"; } |
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} |
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public virtual bool IsPartialBlockOkay |
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{ |
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get { return false; } |
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} |
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public virtual int GetBlockSize() |
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{ |
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return BLOCK_SIZE; |
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} |
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public virtual int ProcessBlock( |
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byte[] input, |
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int inOff, |
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byte[] output, |
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int outOff) |
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{ |
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if (workingKey == null) |
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throw new InvalidOperationException("DES engine not initialised"); |
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Check.DataLength(input, inOff, BLOCK_SIZE, "input buffer too short"); |
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Check.OutputLength(output, outOff, BLOCK_SIZE, "output buffer too short"); |
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DesFunc(workingKey, input, inOff, output, outOff); |
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return BLOCK_SIZE; |
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} |
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public virtual void Reset() |
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{ |
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} |
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/** |
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* what follows is mainly taken from "Applied Cryptography", by |
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* Bruce Schneier, however it also bears great resemblance to Richard |
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* Outerbridge's D3DES... |
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*/ |
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// private static readonly short[] Df_Key = |
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// { |
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// 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef, |
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// 0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10, |
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// 0x89,0xab,0xcd,0xef,0x01,0x23,0x45,0x67 |
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// }; |
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private static readonly short[] bytebit = |
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{ |
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128, 64, 32, 16, 8, 4, 2, 1 |
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}; |
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private static readonly int[] bigbyte = |
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{ |
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0x800000, 0x400000, 0x200000, 0x100000, |
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0x80000, 0x40000, 0x20000, 0x10000, |
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0x8000, 0x4000, 0x2000, 0x1000, |
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0x800, 0x400, 0x200, 0x100, |
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0x80, 0x40, 0x20, 0x10, |
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0x8, 0x4, 0x2, 0x1 |
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}; |
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/* |
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* Use the key schedule specified in the Standard (ANSI X3.92-1981). |
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*/ |
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private static readonly byte[] pc1 = |
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{ |
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56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, |
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9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, |
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62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, |
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13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3 |
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}; |
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private static readonly byte[] totrot = |
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{ |
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1, 2, 4, 6, 8, 10, 12, 14, |
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15, 17, 19, 21, 23, 25, 27, 28 |
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}; |
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private static readonly byte[] pc2 = |
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{ |
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13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, |
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22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, |
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40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, |
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43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 |
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}; |
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private static readonly uint[] SP1 = |
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{ |
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0x01010400, 0x00000000, 0x00010000, 0x01010404, |
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0x01010004, 0x00010404, 0x00000004, 0x00010000, |
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0x00000400, 0x01010400, 0x01010404, 0x00000400, |
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0x01000404, 0x01010004, 0x01000000, 0x00000004, |
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0x00000404, 0x01000400, 0x01000400, 0x00010400, |
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0x00010400, 0x01010000, 0x01010000, 0x01000404, |
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0x00010004, 0x01000004, 0x01000004, 0x00010004, |
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0x00000000, 0x00000404, 0x00010404, 0x01000000, |
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0x00010000, 0x01010404, 0x00000004, 0x01010000, |
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0x01010400, 0x01000000, 0x01000000, 0x00000400, |
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0x01010004, 0x00010000, 0x00010400, 0x01000004, |
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0x00000400, 0x00000004, 0x01000404, 0x00010404, |
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0x01010404, 0x00010004, 0x01010000, 0x01000404, |
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0x01000004, 0x00000404, 0x00010404, 0x01010400, |
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0x00000404, 0x01000400, 0x01000400, 0x00000000, |
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0x00010004, 0x00010400, 0x00000000, 0x01010004 |
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}; |
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private static readonly uint[] SP2 = |
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{ |
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0x80108020, 0x80008000, 0x00008000, 0x00108020, |
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0x00100000, 0x00000020, 0x80100020, 0x80008020, |
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0x80000020, 0x80108020, 0x80108000, 0x80000000, |
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0x80008000, 0x00100000, 0x00000020, 0x80100020, |
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0x00108000, 0x00100020, 0x80008020, 0x00000000, |
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0x80000000, 0x00008000, 0x00108020, 0x80100000, |
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0x00100020, 0x80000020, 0x00000000, 0x00108000, |
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0x00008020, 0x80108000, 0x80100000, 0x00008020, |
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0x00000000, 0x00108020, 0x80100020, 0x00100000, |
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0x80008020, 0x80100000, 0x80108000, 0x00008000, |
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0x80100000, 0x80008000, 0x00000020, 0x80108020, |
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0x00108020, 0x00000020, 0x00008000, 0x80000000, |
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0x00008020, 0x80108000, 0x00100000, 0x80000020, |
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0x00100020, 0x80008020, 0x80000020, 0x00100020, |
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0x00108000, 0x00000000, 0x80008000, 0x00008020, |
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0x80000000, 0x80100020, 0x80108020, 0x00108000 |
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}; |
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private static readonly uint[] SP3 = |
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{ |
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0x00000208, 0x08020200, 0x00000000, 0x08020008, |
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0x08000200, 0x00000000, 0x00020208, 0x08000200, |
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0x00020008, 0x08000008, 0x08000008, 0x00020000, |
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0x08020208, 0x00020008, 0x08020000, 0x00000208, |
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0x08000000, 0x00000008, 0x08020200, 0x00000200, |
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0x00020200, 0x08020000, 0x08020008, 0x00020208, |
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0x08000208, 0x00020200, 0x00020000, 0x08000208, |
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0x00000008, 0x08020208, 0x00000200, 0x08000000, |
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0x08020200, 0x08000000, 0x00020008, 0x00000208, |
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0x00020000, 0x08020200, 0x08000200, 0x00000000, |
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0x00000200, 0x00020008, 0x08020208, 0x08000200, |
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0x08000008, 0x00000200, 0x00000000, 0x08020008, |
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0x08000208, 0x00020000, 0x08000000, 0x08020208, |
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0x00000008, 0x00020208, 0x00020200, 0x08000008, |
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0x08020000, 0x08000208, 0x00000208, 0x08020000, |
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0x00020208, 0x00000008, 0x08020008, 0x00020200 |
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}; |
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private static readonly uint[] SP4 = |
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{ |
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0x00802001, 0x00002081, 0x00002081, 0x00000080, |
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0x00802080, 0x00800081, 0x00800001, 0x00002001, |
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0x00000000, 0x00802000, 0x00802000, 0x00802081, |
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0x00000081, 0x00000000, 0x00800080, 0x00800001, |
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0x00000001, 0x00002000, 0x00800000, 0x00802001, |
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0x00000080, 0x00800000, 0x00002001, 0x00002080, |
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0x00800081, 0x00000001, 0x00002080, 0x00800080, |
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0x00002000, 0x00802080, 0x00802081, 0x00000081, |
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0x00800080, 0x00800001, 0x00802000, 0x00802081, |
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0x00000081, 0x00000000, 0x00000000, 0x00802000, |
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0x00002080, 0x00800080, 0x00800081, 0x00000001, |
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0x00802001, 0x00002081, 0x00002081, 0x00000080, |
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0x00802081, 0x00000081, 0x00000001, 0x00002000, |
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0x00800001, 0x00002001, 0x00802080, 0x00800081, |
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0x00002001, 0x00002080, 0x00800000, 0x00802001, |
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0x00000080, 0x00800000, 0x00002000, 0x00802080 |
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}; |
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private static readonly uint[] SP5 = |
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{ |
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0x00000100, 0x02080100, 0x02080000, 0x42000100, |
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0x00080000, 0x00000100, 0x40000000, 0x02080000, |
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0x40080100, 0x00080000, 0x02000100, 0x40080100, |
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0x42000100, 0x42080000, 0x00080100, 0x40000000, |
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0x02000000, 0x40080000, 0x40080000, 0x00000000, |
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0x40000100, 0x42080100, 0x42080100, 0x02000100, |
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0x42080000, 0x40000100, 0x00000000, 0x42000000, |
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0x02080100, 0x02000000, 0x42000000, 0x00080100, |
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0x00080000, 0x42000100, 0x00000100, 0x02000000, |
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0x40000000, 0x02080000, 0x42000100, 0x40080100, |
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0x02000100, 0x40000000, 0x42080000, 0x02080100, |
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0x40080100, 0x00000100, 0x02000000, 0x42080000, |
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0x42080100, 0x00080100, 0x42000000, 0x42080100, |
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0x02080000, 0x00000000, 0x40080000, 0x42000000, |
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0x00080100, 0x02000100, 0x40000100, 0x00080000, |
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0x00000000, 0x40080000, 0x02080100, 0x40000100 |
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}; |
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private static readonly uint[] SP6 = |
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{ |
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0x20000010, 0x20400000, 0x00004000, 0x20404010, |
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0x20400000, 0x00000010, 0x20404010, 0x00400000, |
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0x20004000, 0x00404010, 0x00400000, 0x20000010, |
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0x00400010, 0x20004000, 0x20000000, 0x00004010, |
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0x00000000, 0x00400010, 0x20004010, 0x00004000, |
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0x00404000, 0x20004010, 0x00000010, 0x20400010, |
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0x20400010, 0x00000000, 0x00404010, 0x20404000, |
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0x00004010, 0x00404000, 0x20404000, 0x20000000, |
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0x20004000, 0x00000010, 0x20400010, 0x00404000, |
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0x20404010, 0x00400000, 0x00004010, 0x20000010, |
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0x00400000, 0x20004000, 0x20000000, 0x00004010, |
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0x20000010, 0x20404010, 0x00404000, 0x20400000, |
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0x00404010, 0x20404000, 0x00000000, 0x20400010, |
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0x00000010, 0x00004000, 0x20400000, 0x00404010, |
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0x00004000, 0x00400010, 0x20004010, 0x00000000, |
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0x20404000, 0x20000000, 0x00400010, 0x20004010 |
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}; |
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private static readonly uint[] SP7 = |
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{ |
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0x00200000, 0x04200002, 0x04000802, 0x00000000, |
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0x00000800, 0x04000802, 0x00200802, 0x04200800, |
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0x04200802, 0x00200000, 0x00000000, 0x04000002, |
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0x00000002, 0x04000000, 0x04200002, 0x00000802, |
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0x04000800, 0x00200802, 0x00200002, 0x04000800, |
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0x04000002, 0x04200000, 0x04200800, 0x00200002, |
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0x04200000, 0x00000800, 0x00000802, 0x04200802, |
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0x00200800, 0x00000002, 0x04000000, 0x00200800, |
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0x04000000, 0x00200800, 0x00200000, 0x04000802, |
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0x04000802, 0x04200002, 0x04200002, 0x00000002, |
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0x00200002, 0x04000000, 0x04000800, 0x00200000, |
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0x04200800, 0x00000802, 0x00200802, 0x04200800, |
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0x00000802, 0x04000002, 0x04200802, 0x04200000, |
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0x00200800, 0x00000000, 0x00000002, 0x04200802, |
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0x00000000, 0x00200802, 0x04200000, 0x00000800, |
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0x04000002, 0x04000800, 0x00000800, 0x00200002 |
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}; |
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private static readonly uint[] SP8 = |
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{ |
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0x10001040, 0x00001000, 0x00040000, 0x10041040, |
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0x10000000, 0x10001040, 0x00000040, 0x10000000, |
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0x00040040, 0x10040000, 0x10041040, 0x00041000, |
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0x10041000, 0x00041040, 0x00001000, 0x00000040, |
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0x10040000, 0x10000040, 0x10001000, 0x00001040, |
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0x00041000, 0x00040040, 0x10040040, 0x10041000, |
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0x00001040, 0x00000000, 0x00000000, 0x10040040, |
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0x10000040, 0x10001000, 0x00041040, 0x00040000, |
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0x00041040, 0x00040000, 0x10041000, 0x00001000, |
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0x00000040, 0x10040040, 0x00001000, 0x00041040, |
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0x10001000, 0x00000040, 0x10000040, 0x10040000, |
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0x10040040, 0x10000000, 0x00040000, 0x10001040, |
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0x00000000, 0x10041040, 0x00040040, 0x10000040, |
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0x10040000, 0x10001000, 0x10001040, 0x00000000, |
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0x10041040, 0x00041000, 0x00041000, 0x00001040, |
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0x00001040, 0x00040040, 0x10000000, 0x10041000 |
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}; |
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/** |
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* Generate an integer based working key based on our secret key |
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* and what we processing we are planning to do. |
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* |
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* Acknowledgements for this routine go to James Gillogly and Phil Karn. |
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* (whoever, and wherever they are!). |
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*/ |
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protected static int[] GenerateWorkingKey( |
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bool encrypting, |
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byte[] key) |
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{ |
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int[] newKey = new int[32]; |
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bool[] pc1m = new bool[56]; |
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bool[] pcr = new bool[56]; |
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for (int j = 0; j < 56; j++ ) |
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{ |
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int l = pc1[j]; |
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pc1m[j] = ((key[(uint) l >> 3] & bytebit[l & 07]) != 0); |
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} |
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for (int i = 0; i < 16; i++) |
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{ |
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int l, m, n; |
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if (encrypting) |
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{ |
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m = i << 1; |
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} |
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else |
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{ |
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m = (15 - i) << 1; |
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} |
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n = m + 1; |
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newKey[m] = newKey[n] = 0; |
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for (int j = 0; j < 28; j++) |
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{ |
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l = j + totrot[i]; |
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if ( l < 28 ) |
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{ |
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pcr[j] = pc1m[l]; |
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} |
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else |
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{ |
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pcr[j] = pc1m[l - 28]; |
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} |
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} |
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for (int j = 28; j < 56; j++) |
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{ |
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l = j + totrot[i]; |
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if (l < 56 ) |
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{ |
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pcr[j] = pc1m[l]; |
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} |
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else |
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{ |
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pcr[j] = pc1m[l - 28]; |
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} |
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} |
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for (int j = 0; j < 24; j++) |
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{ |
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if (pcr[pc2[j]]) |
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{ |
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newKey[m] |= bigbyte[j]; |
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} |
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if (pcr[pc2[j + 24]]) |
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{ |
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newKey[n] |= bigbyte[j]; |
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} |
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} |
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} |
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// |
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// store the processed key |
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// |
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for (int i = 0; i != 32; i += 2) |
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{ |
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int i1, i2; |
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i1 = newKey[i]; |
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i2 = newKey[i + 1]; |
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newKey[i] = (int) ( (uint) ((i1 & 0x00fc0000) << 6) | |
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(uint) ((i1 & 0x00000fc0) << 10) | |
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((uint) (i2 & 0x00fc0000) >> 10) | |
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((uint) (i2 & 0x00000fc0) >> 6)); |
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newKey[i + 1] = (int) ( (uint) ((i1 & 0x0003f000) << 12) | |
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(uint) ((i1 & 0x0000003f) << 16) | |
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((uint) (i2 & 0x0003f000) >> 4) | |
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(uint) (i2 & 0x0000003f)); |
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} |
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return newKey; |
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} |
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/** |
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* the DES engine. |
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*/ |
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internal static void DesFunc( |
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int[] wKey, |
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byte[] input, |
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int inOff, |
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byte[] outBytes, |
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int outOff) |
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{ |
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uint left = Pack.BE_To_UInt32(input, inOff); |
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uint right = Pack.BE_To_UInt32(input, inOff + 4); |
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uint work; |
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work = ((left >> 4) ^ right) & 0x0f0f0f0f; |
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right ^= work; |
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left ^= (work << 4); |
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work = ((left >> 16) ^ right) & 0x0000ffff; |
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right ^= work; |
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left ^= (work << 16); |
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work = ((right >> 2) ^ left) & 0x33333333; |
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left ^= work; |
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right ^= (work << 2); |
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work = ((right >> 8) ^ left) & 0x00ff00ff; |
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left ^= work; |
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right ^= (work << 8); |
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right = (right << 1) | (right >> 31); |
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work = (left ^ right) & 0xaaaaaaaa; |
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left ^= work; |
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right ^= work; |
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left = (left << 1) | (left >> 31); |
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for (int round = 0; round < 8; round++) |
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{ |
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uint fval; |
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work = (right << 28) | (right >> 4); |
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work ^= (uint)wKey[round * 4 + 0]; |
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fval = SP7[work & 0x3f]; |
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fval |= SP5[(work >> 8) & 0x3f]; |
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fval |= SP3[(work >> 16) & 0x3f]; |
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fval |= SP1[(work >> 24) & 0x3f]; |
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work = right ^ (uint)wKey[round * 4 + 1]; |
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fval |= SP8[ work & 0x3f]; |
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fval |= SP6[(work >> 8) & 0x3f]; |
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fval |= SP4[(work >> 16) & 0x3f]; |
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fval |= SP2[(work >> 24) & 0x3f]; |
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left ^= fval; |
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work = (left << 28) | (left >> 4); |
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work ^= (uint)wKey[round * 4 + 2]; |
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fval = SP7[ work & 0x3f]; |
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fval |= SP5[(work >> 8) & 0x3f]; |
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fval |= SP3[(work >> 16) & 0x3f]; |
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fval |= SP1[(work >> 24) & 0x3f]; |
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work = left ^ (uint)wKey[round * 4 + 3]; |
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fval |= SP8[ work & 0x3f]; |
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fval |= SP6[(work >> 8) & 0x3f]; |
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fval |= SP4[(work >> 16) & 0x3f]; |
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fval |= SP2[(work >> 24) & 0x3f]; |
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right ^= fval; |
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} |
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right = (right << 31) | (right >> 1); |
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work = (left ^ right) & 0xaaaaaaaa; |
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left ^= work; |
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right ^= work; |
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left = (left << 31) | (left >> 1); |
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work = ((left >> 8) ^ right) & 0x00ff00ff; |
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right ^= work; |
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left ^= (work << 8); |
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work = ((left >> 2) ^ right) & 0x33333333; |
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right ^= work; |
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left ^= (work << 2); |
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work = ((right >> 16) ^ left) & 0x0000ffff; |
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left ^= work; |
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right ^= (work << 16); |
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work = ((right >> 4) ^ left) & 0x0f0f0f0f; |
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left ^= work; |
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right ^= (work << 4); |
|
|
|
Pack.UInt32_To_BE(right, outBytes, outOff); |
|
Pack.UInt32_To_BE(left, outBytes, outOff + 4); |
|
} |
|
} |
|
} |
|
#pragma warning restore |
|
#endif
|
|
|