Examples of java.math.BigInteger.toByteArray()

java.math.BigInteger.toByteArray()
Returns a byte array containing the two's-complement representation of this BigInteger. The byte array will be in big-endian byte-order: the most significant byte is in the zeroth element. The array will contain the minimum number of bytes required to represent this BigInteger, including at least one sign bit, which is {@code (ceil((this.bitLength() +1)/8))}. (This representation is compatible with the {@link #BigInteger(byte[]) (byte[])} constructor.) @return a byte array containing the two's-complement representation ofthis BigInteger. @see #BigInteger(byte[])

      byte[] ub =
      {hB[0], hB[1], hB[2], hB[3]};
      // Calculate S = (A * v^u) ^ b % N
      BigInteger A = new BigInteger(1, ab);
      if( log.isTraceEnabled() )
         log.trace("A: "+CryptoUtil.tob64(A.toByteArray()));
      if( log.isTraceEnabled() )
         log.trace("B: "+CryptoUtil.tob64(B.toByteArray()));
      if( log.isTraceEnabled() )
         log.trace("v: "+CryptoUtil.tob64(v.toByteArray()));
      BigInteger u = new BigInteger(1, ub);

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         log.trace("B: "+CryptoUtil.tob64(B.toByteArray()));
      if( log.isTraceEnabled() )
         log.trace("v: "+CryptoUtil.tob64(v.toByteArray()));
      BigInteger u = new BigInteger(1, ub);
      if( log.isTraceEnabled() )
         log.trace("u: "+CryptoUtil.tob64(u.toByteArray()));
      BigInteger A_v2u = A.multiply(v.modPow(u, N)).mod(N);
      if( log.isTraceEnabled() )
         log.trace("A * v^u: "+CryptoUtil.tob64(A_v2u.toByteArray()));
      BigInteger S = A_v2u.modPow(b, N);
      if( log.isTraceEnabled() )

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      BigInteger u = new BigInteger(1, ub);
      if( log.isTraceEnabled() )
         log.trace("u: "+CryptoUtil.tob64(u.toByteArray()));
      BigInteger A_v2u = A.multiply(v.modPow(u, N)).mod(N);
      if( log.isTraceEnabled() )
         log.trace("A * v^u: "+CryptoUtil.tob64(A_v2u.toByteArray()));
      BigInteger S = A_v2u.modPow(b, N);
      if( log.isTraceEnabled() )
         log.trace("S: "+CryptoUtil.tob64(S.toByteArray()));
      // K = SessionHash(S)
      MessageDigest sessionDigest = MessageDigest.getInstance(params.hashAlgorithm);

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      BigInteger A_v2u = A.multiply(v.modPow(u, N)).mod(N);
      if( log.isTraceEnabled() )
         log.trace("A * v^u: "+CryptoUtil.tob64(A_v2u.toByteArray()));
      BigInteger S = A_v2u.modPow(b, N);
      if( log.isTraceEnabled() )
         log.trace("S: "+CryptoUtil.tob64(S.toByteArray()));
      // K = SessionHash(S)
      MessageDigest sessionDigest = MessageDigest.getInstance(params.hashAlgorithm);
      K = sessionDigest.digest(S.toByteArray());
      if( log.isTraceEnabled() )
         log.trace("K: "+CryptoUtil.tob64(K));

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      BigInteger S = A_v2u.modPow(b, N);
      if( log.isTraceEnabled() )
         log.trace("S: "+CryptoUtil.tob64(S.toByteArray()));
      // K = SessionHash(S)
      MessageDigest sessionDigest = MessageDigest.getInstance(params.hashAlgorithm);
      K = sessionDigest.digest(S.toByteArray());
      if( log.isTraceEnabled() )
         log.trace("K: "+CryptoUtil.tob64(K));
      // clientHash = H(N) xor H(g) | H(U) | A | B | K
      clientHash.update(K);
      if( log.isTraceEnabled() )

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      System.out.println("key.Format = "+key.getFormat());
      System.out.println("key.Encoded Size = "+kbytes.length);
      
      SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
      BigInteger bi = new BigInteger(320, rnd);
      byte[] k2bytes = bi.toByteArray();
      SecretKeySpec keySpec = new SecretKeySpec(k2bytes, "Blowfish");
      System.out.println("key2.Algorithm = "+key.getAlgorithm());
      System.out.println("key2.Format = "+key.getFormat());
      System.out.println("key2.Encoded Size = "+kbytes.length);
   }

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      byte[] ub =
      {hB[0], hB[1], hB[2], hB[3]};
      // Calculate S = (B - g^x) ^ (a + u * x) % N
      BigInteger B = new BigInteger(1, Bbytes);
      if( log.isTraceEnabled() )
         log.trace("B: "+CryptoUtil.tob64(B.toByteArray()));
      if( B.compareTo(v) < 0 )
         B = B.add(N);
      if( log.isTraceEnabled() )
         log.trace("B': "+CryptoUtil.tob64(B.toByteArray()));
      if( log.isTraceEnabled() )

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      if( log.isTraceEnabled() )
         log.trace("B: "+CryptoUtil.tob64(B.toByteArray()));
      if( B.compareTo(v) < 0 )
         B = B.add(N);
      if( log.isTraceEnabled() )
         log.trace("B': "+CryptoUtil.tob64(B.toByteArray()));
      if( log.isTraceEnabled() )
         log.trace("v: "+CryptoUtil.tob64(v.toByteArray()));
      BigInteger u = new BigInteger(1, ub);
      if( log.isTraceEnabled() )
         log.trace("u: "+CryptoUtil.tob64(u.toByteArray()));

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         log.trace("B': "+CryptoUtil.tob64(B.toByteArray()));
      if( log.isTraceEnabled() )
         log.trace("v: "+CryptoUtil.tob64(v.toByteArray()));
      BigInteger u = new BigInteger(1, ub);
      if( log.isTraceEnabled() )
         log.trace("u: "+CryptoUtil.tob64(u.toByteArray()));
      BigInteger B_v = B.subtract(v);
      if( log.isTraceEnabled() )
         log.trace("B - v: "+CryptoUtil.tob64(B_v.toByteArray()));
      BigInteger a_ux = a.add(u.multiply(x));
      if( log.isTraceEnabled() )

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      BigInteger u = new BigInteger(1, ub);
      if( log.isTraceEnabled() )
         log.trace("u: "+CryptoUtil.tob64(u.toByteArray()));
      BigInteger B_v = B.subtract(v);
      if( log.isTraceEnabled() )
         log.trace("B - v: "+CryptoUtil.tob64(B_v.toByteArray()));
      BigInteger a_ux = a.add(u.multiply(x));
      if( log.isTraceEnabled() )
         log.trace("a + u * x: "+CryptoUtil.tob64(a_ux.toByteArray()));
      BigInteger S = B_v.modPow(a_ux, N);
      if( log.isTraceEnabled() )

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