jcrypt.java

MPICH是MPI的重要研究,提供了一系列的接口函数,为并行计算的实现提供了编程环境.

         0x00001000, 0x00000080, 0x00400080, 0x00400001,
         0x00401081, 0x00001001, 0x00001080, 0x00000000,
         0x00400000, 0x00400081, 0x00000081, 0x00401000,
         0x00000001, 0x00401080, 0x00401000, 0x00000081,
         0x00400081, 0x00001000, 0x00001001, 0x00401081,
         0x00000000, 0x00400080, 0x00400001, 0x00001080,
         0x00401001, 0x00001081, 0x00401080, 0x00000001,
         0x00001081, 0x00401001, 0x00000080, 0x00400000,
         0x00001081, 0x00401000, 0x00401001, 0x00000081,
         0x00001000, 0x00000080, 0x00400000, 0x00401001,
         0x00400081, 0x00001081, 0x00001080, 0x00000000,
         0x00000080, 0x00400001, 0x00000001, 0x00400080,
         0x00000000, 0x00400081, 0x00400080, 0x00001080,
         0x00000081, 0x00001000, 0x00401081, 0x00400000,
         0x00401080, 0x00000001, 0x00001001, 0x00401081,
         0x00400001, 0x00401080, 0x00401000, 0x00001001,
      },
      {
         /* nibble 7 */
         0x08200020, 0x08208000, 0x00008020, 0x00000000,
         0x08008000, 0x00200020, 0x08200000, 0x08208020,
         0x00000020, 0x08000000, 0x00208000, 0x00008020,
         0x00208020, 0x08008020, 0x08000020, 0x08200000,
         0x00008000, 0x00208020, 0x00200020, 0x08008000,
         0x08208020, 0x08000020, 0x00000000, 0x00208000,
         0x08000000, 0x00200000, 0x08008020, 0x08200020,
         0x00200000, 0x00008000, 0x08208000, 0x00000020,
         0x00200000, 0x00008000, 0x08000020, 0x08208020,
         0x00008020, 0x08000000, 0x00000000, 0x00208000,
         0x08200020, 0x08008020, 0x08008000, 0x00200020,
         0x08208000, 0x00000020, 0x00200020, 0x08008000,
         0x08208020, 0x00200000, 0x08200000, 0x08000020,
         0x00208000, 0x00008020, 0x08008020, 0x08200000,
         0x00000020, 0x08208000, 0x00208020, 0x00000000,
         0x08000000, 0x08200020, 0x00008000, 0x00208020
      }
   };

   private static final int cov_2char[] =
   {
      0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 
      0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 
      0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 
      0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 
      0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 
      0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 
      0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 
      0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
   };

   private static final int byteToUnsigned(byte b)
   {
      int value = (int)b;

      return(value >= 0 ? value : value + 256);
   }

   private static int fourBytesToInt(byte b[], int offset)
   {
      int value;

      value  =  byteToUnsigned(b[offset++]);
      value |= (byteToUnsigned(b[offset++]) <<  8);
      value |= (byteToUnsigned(b[offset++]) << 16);
      value |= (byteToUnsigned(b[offset++]) << 24);

      return(value);
   }

   private static final void intToFourBytes(int iValue, byte b[], int offset)
   {
      b[offset++] = (byte)((iValue)        & 0xff);
      b[offset++] = (byte)((iValue >>> 8 ) & 0xff);
      b[offset++] = (byte)((iValue >>> 16) & 0xff);
      b[offset++] = (byte)((iValue >>> 24) & 0xff);
   }

   private static final void PERM_OP(int a, int b, int n, int m, int results[])
   {
      int t;

      t = ((a >>> n) ^ b) & m;
      a ^= t << n;
      b ^= t;

      results[0] = a;
      results[1] = b;
   }

   private static final int HPERM_OP(int a, int n, int m)
   {
      int t;

      t = ((a << (16 - n)) ^ a) & m;
      a = a ^ t ^ (t >>> (16 - n));

      return(a);
   }

   private static int [] des_set_key(byte key[])
   {
      int schedule[] = new int[ITERATIONS * 2];

      int c = fourBytesToInt(key, 0);
      int d = fourBytesToInt(key, 4);

      int results[] = new int[2];

      PERM_OP(d, c, 4, 0x0f0f0f0f, results);
      d = results[0]; c = results[1];

      c = HPERM_OP(c, -2, 0xcccc0000);
      d = HPERM_OP(d, -2, 0xcccc0000);

      PERM_OP(d, c, 1, 0x55555555, results);
      d = results[0]; c = results[1];

      PERM_OP(c, d, 8, 0x00ff00ff, results);
      c = results[0]; d = results[1];

      PERM_OP(d, c, 1, 0x55555555, results);
      d = results[0]; c = results[1];

      d = (((d & 0x000000ff) <<  16) |  (d & 0x0000ff00)     |
           ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
      c &= 0x0fffffff;

      int s, t;
      int j = 0;

      for(int i = 0; i < ITERATIONS; i ++)
      {
         if(shifts2[i])
         {
            c = (c >>> 2) | (c << 26);
            d = (d >>> 2) | (d << 26);
         }
         else
         {
            c = (c >>> 1) | (c << 27);
            d = (d >>> 1) | (d << 27);
         }

         c &= 0x0fffffff;
         d &= 0x0fffffff;

         s = skb[0][ (c       ) & 0x3f                       ]|
             skb[1][((c >>>  6) & 0x03) | ((c >>>  7) & 0x3c)]|
             skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]|
             skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06) |
                                          ((c >>> 22) & 0x38)];

         t = skb[4][ (d     )  & 0x3f                       ]|
             skb[5][((d >>> 7) & 0x03) | ((d >>>  8) & 0x3c)]|
             skb[6][ (d >>>15) & 0x3f                       ]|
             skb[7][((d >>>21) & 0x0f) | ((d >>> 22) & 0x30)];

         schedule[j++] = ((t <<  16) | (s & 0x0000ffff)) & 0xffffffff;
         s             = ((s >>> 16) | (t & 0xffff0000));

         s             = (s << 4) | (s >>> 28);
         schedule[j++] = s & 0xffffffff;
      }
      return(schedule);
   }

   private static final int D_ENCRYPT
   (
      int L, int R, int S, int E0, int E1, int s[]
   )
   {
      int t, u, v;

      v = R ^ (R >>> 16);
      u = v & E0;
      v = v & E1;
      u = (u ^ (u << 16)) ^ R ^ s[S];
      t = (v ^ (v << 16)) ^ R ^ s[S + 1];
      t = (t >>> 4) | (t << 28);

      L ^= SPtrans[1][(t       ) & 0x3f] |
           SPtrans[3][(t >>>  8) & 0x3f] |
           SPtrans[5][(t >>> 16) & 0x3f] |
           SPtrans[7][(t >>> 24) & 0x3f] |
           SPtrans[0][(u       ) & 0x3f] |
           SPtrans[2][(u >>>  8) & 0x3f] |
           SPtrans[4][(u >>> 16) & 0x3f] |
           SPtrans[6][(u >>> 24) & 0x3f];

      return(L);
   }

   private static final int [] body(int schedule[], int Eswap0, int Eswap1)
   {
      int left = 0;
      int right = 0;
      int t     = 0;

      for(int j = 0; j < 25; j ++)
      {
         for(int i = 0; i < ITERATIONS * 2; i += 4)
         {
            left  = D_ENCRYPT(left,  right, i,     Eswap0, Eswap1, schedule);
            right = D_ENCRYPT(right, left,  i + 2, Eswap0, Eswap1, schedule);
         }
         t     = left; 
         left  = right; 
         right = t;
      }

      t = right;

      right = (left >>> 1) | (left << 31);
      left  = (t    >>> 1) | (t    << 31);

      left  &= 0xffffffff;
      right &= 0xffffffff;

      int results[] = new int[2];

      PERM_OP(right, left, 1, 0x55555555, results); 
      right = results[0]; left = results[1];

      PERM_OP(left, right, 8, 0x00ff00ff, results); 
      left = results[0]; right = results[1];

      PERM_OP(right, left, 2, 0x33333333, results); 
      right = results[0]; left = results[1];

      PERM_OP(left, right, 16, 0x0000ffff, results);
      left = results[0]; right = results[1];

      PERM_OP(right, left, 4, 0x0f0f0f0f, results);
      right = results[0]; left = results[1];

      int out[] = new int[2];

      out[0] = left; out[1] = right;

      return(out);
   }

   public static final String crypt(String salt, String original)
   {
      while(salt.length() < 2)
         salt += "A";

      StringBuffer buffer = new StringBuffer("             ");

      char charZero = salt.charAt(0);
      char charOne  = salt.charAt(1);

      buffer.setCharAt(0, charZero);
      buffer.setCharAt(1, charOne);

      int Eswap0 = con_salt[(int)charZero];
      int Eswap1 = con_salt[(int)charOne] << 4;
 
      byte key[] = new byte[8];

      for(int i = 0; i < key.length; i ++)
         key[i] = (byte)0;

      for(int i = 0; i < key.length && i < original.length(); i ++)
      {
         int iChar = (int)original.charAt(i);

         key[i] = (byte)(iChar << 1);
      }

      int schedule[] = des_set_key(key);
      int out[]      = body(schedule, Eswap0, Eswap1);

      byte b[] = new byte[9];

      intToFourBytes(out[0], b, 0);
      intToFourBytes(out[1], b, 4);
      b[8] = 0;

      for(int i = 2, y = 0, u = 0x80; i < 13; i ++)
      {
         for(int j = 0, c = 0; j < 6; j ++)
         {
            c <<= 1;

            if(((int)b[y] & u) != 0)
               c |= 1;

            u >>>= 1;

            if(u == 0)
            {
               y++;
               u = 0x80;
            }
            buffer.setCharAt(i, (char)cov_2char[c]);
         }
      }
      return(buffer.toString());
   }

   public static void main(String args[])
   {
      if(args.length >= 2)
      {
         System.out.println
         (
            "[" + args[0] + "] [" + args[1] + "] => [" +
            jcrypt.crypt(args[0], args[1]) + "]"
         );
      }
   }
}