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 rBytes[] = {7};
    BigInteger aNumber = new BigInteger(aSign, aBytes);
    BigInteger bNumber = new BigInteger(bSign, bBytes);
    BigInteger result = aNumber.gcd(bNumber);
    byte resBytes[] = new byte[rBytes.length];
    resBytes = result.toByteArray();
    for(int i = 0; i < resBytes.length; i++) {
      assertTrue(resBytes[i] == rBytes[i]);
    }
    assertEquals("incorrect sign", 1, result.signum());
  }

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            sum = sum.multiply(BigInteger.valueOf(3));
            sum = sum.add(BigInteger.valueOf(coeffs[i] + 1));
        }


        int size = (BigInteger.valueOf(3).pow(coeffs.length).bitLength() + 7) / 8;
        byte[] arr = sum.toByteArray();


        if (arr.length < size)
        {
            // pad with leading zeros so arr.length==size
            byte[] arr2 = new byte[size];

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                }
            }
        }


        byte[] result = new byte[sq + 1];
        byte[] help = d.toByteArray();
        if (help.length < result.length)
        {
            System.arraycopy(help, 0, result, 0, help.length);
            for (int i = help.length; i < result.length; i++)
            {

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            //generate one
            if( idArray == null || idArray.size() < 2 )
            {
                MessageDigest md = MessageDigests.getMD5();
                BigInteger time = BigInteger.valueOf( System.currentTimeMillis() );
                md.update( time.toByteArray() );
                md.update( ownerPassword.getBytes("ISO-8859-1") );
                md.update( userPassword.getBytes("ISO-8859-1") );
                md.update( document.getDocument().toString().getBytes() );


                byte[] id = md.digest( this.toString().getBytes("ISO-8859-1") );

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        BigInteger  z = agree.calculateAgreement(pubParam);


        if (forEncryption)
        {
            return encryptBlock(in, inOff, inLen, z.toByteArray());
        }
        else
        {
            return decryptBlock(in, inOff, inLen, z.toByteArray());
        }

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        {
            return encryptBlock(in, inOff, inLen, z.toByteArray());
        }
        else
        {
            return decryptBlock(in, inOff, inLen, z.toByteArray());
        }
    }
}

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            BigInteger  g = key.getParameters().getG();
            BigInteger  gamma = g.modPow(k, p);
            BigInteger  phi = input.multiply(pub.getY().modPow(k, p)).mod(p);


            byte[]  out1 = gamma.toByteArray();
            byte[]  out2 = phi.toByteArray();
            byte[]  output = new byte[this.getOutputBlockSize()];


            if (out1.length > output.length / 2)
            {
                System.arraycopy(out1, 1, output, output.length / 2 - (out1.length - 1), out1.length - 1);

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            //          returning null");
            //      }
            //      output = null;
            // }


            output = test.toByteArray();


        }


        return output;
    }

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            System.out.println("c(m1)*c(m2)%n = c(m1+m2)%n: " + m1m2Crypt);
        }


        byte[] output = key.getModulus().toByteArray();
        Arrays.fill(output, (byte)0);
        System.arraycopy(m1m2Crypt.toByteArray(), 0, output, output.length
                - m1m2Crypt.toByteArray().length,
                m1m2Crypt.toByteArray().length);


        return output;
    }

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        }


        byte[] output = key.getModulus().toByteArray();
        Arrays.fill(output, (byte)0);
        System.arraycopy(m1m2Crypt.toByteArray(), 0, output, output.length
                - m1m2Crypt.toByteArray().length,
                m1m2Crypt.toByteArray().length);


        return output;
    }

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