PC Pro 1998 October/DPPCPRO1098.ISO/Hotdog/files/snagpack.exe/MDIGEST.CLASS

Java Class File | 1997-11-21 | 2.9 KB | 223 lines

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Random;

public abstract class mdigest {
   public byte[] digestBits;
   public boolean digestValid;
   static byte[] testdata;

   public abstract String getAlg();

   public void updateASCII(String var1) {
      int var3 = var1.length();

      for(int var2 = 0; var2 < var3; ++var2) {
         byte var4 = (byte)(var1.charAt(var2) & 255);
         this.update(var4);
      }

   }

   public String toString() {
      ByteArrayOutputStream var1 = new ByteArrayOutputStream();
      PrintStream var2 = new PrintStream(var1);
      var2.print(this.getClass().getName() + " Message Digest ");
      if (this.digestValid) {
         var2.print("<");

         for(int var3 = 0; var3 < this.digestBits.length; ++var3) {
            this.hexDigit(var2, this.digestBits[var3]);
         }

         var2.print(">");
      } else {
         var2.print("<incomplete>");
      }

      var2.println();
      return var1.toString();
   }

   public static boolean isEqual(byte[] var0, byte[] var1) {
      if (var0.length != var1.length) {
         return false;
      } else {
         for(int var2 = 0; var2 < var0.length; ++var2) {
            if (var0[var2] != var1[var2]) {
               return false;
            }
         }

         return true;
      }
   }

   public boolean isEqual(byte[] var1) {
      return isEqual(this.digestBits, var1);
   }

   public static void benchmark(mdigest var0) {
      Random var1 = new Random();
      testdata = new byte[16384];
      long[] var2 = new long[14];
      double[] var3 = new double[14];

      for(int var4 = 0; var4 < testdata.length; ++var4) {
         testdata[var4] = (byte)(var1.nextInt() >>> 8);
      }

      System.out.println("Benchmarking " + var0.getAlg());
      System.out.println("Bytes   Time (mS)   Rate (Bytes/Sec)");
      int var8 = 1;

      do {
         long var5 = System.currentTimeMillis();
         var0.init();

         for(int var7 = 0; var7 < var8; ++var7) {
            var0.update(testdata);
         }

         var0.finish();
         var2[var8] = System.currentTimeMillis() - var5;
         var3[var8] = (double)(var8 * testdata.length) * (double)1000.0F / (double)var2[var8];
         System.out.println(var8 * testdata.length + "\t" + var2[var8] + "\t" + var3[var8]);
         ++var8;
      } while(var8 < 10);

      System.out.println("Done.");
   }

   public abstract void update(byte var1);

   public synchronized void update(boolean var1) {
      byte var2;
      if (var1) {
         var2 = 1;
      } else {
         var2 = 0;
      }

      this.update(var2);
   }

   public synchronized void update(short var1) {
      byte var2 = (byte)(var1 >>> 8 & 255);
      byte var3 = (byte)(var1 & 255);
      this.update(var2);
      this.update(var3);
   }

   public synchronized void update(int var1) {
      int var3 = 3;

      do {
         byte var2 = (byte)(var1 >>> var3 * 8 & 255);
         this.update(var2);
         --var3;
      } while(var3 >= 0);

   }

   public synchronized void update(long var1) {
      int var4 = 7;

      do {
         byte var3 = (byte)((int)(var1 >>> var4 * 8 & 255L));
         this.update(var3);
         --var4;
      } while(var4 >= 0);

   }

   public synchronized void update(byte[] var1, int var2, int var3) {
      for(int var4 = 0; var4 < var3; ++var4) {
         this.update(var1[var4 + var2]);
      }

   }

   public synchronized void update(byte[] var1) {
      this.update(var1, 0, var1.length);
   }

   public synchronized void update(short[] var1) {
      for(int var2 = 0; var2 < var1.length; ++var2) {
         this.update(var1[var2]);
      }

   }

   public synchronized void update(int[] var1) {
      for(int var2 = 0; var2 < var1.length; ++var2) {
         this.update(var1[var2]);
      }

   }

   public synchronized void update(long[] var1) {
      for(int var2 = 0; var2 < var1.length; ++var2) {
         this.update(var1[var2]);
      }

   }

   public void update(String var1) {
      int var3 = var1.length();

      for(int var2 = 0; var2 < var3; ++var2) {
         short var4 = (short)var1.charAt(var2);
         this.update(var4);
      }

   }

   public void update(InputStream var1) {
      byte var2;
      try {
         while((var2 = (byte)var1.read()) != -1) {
            this.update(var2);
         }
      } catch (Exception var3) {
      }

   }

   private void hexDigit(PrintStream var1, byte var2) {
      char var3 = (char)(var2 >> 4 & 15);
      if (var3 > '\t') {
         var3 = (char)(var3 - 10 + 65);
      } else {
         var3 = (char)(var3 + 48);
      }

      var1.write(var3);
      var3 = (char)(var2 & 15);
      if (var3 > '\t') {
         var3 = (char)(var3 - 10 + 65);
      } else {
         var3 = (char)(var3 + 48);
      }

      var1.write(var3);
   }

   public void computeDigest(byte[] var1) {
      this.init();
      this.update(var1);
      this.finish();
   }

   public void computeDigest(InputStream var1) {
      this.init();
      this.update(var1);
      this.finish();
   }

   public abstract void init();

   public abstract void finish();
}