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[])

    }
    
    private static class BigIntegerColumnSerializer extends ColumnSerializer {
        protected void writeObject(ObjectOutput out, Object obj) throws IOException {
            BigInteger val = (BigInteger)obj;
            byte[] bytes = val.toByteArray();
            out.writeInt(bytes.length);
            out.write(bytes);
        }
        protected Object readObject(ObjectInput in) throws IOException {
            int length = in.readInt();

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    private static class BigDecimalColumnSerializer extends ColumnSerializer {
        protected void writeObject(ObjectOutput out, Object obj) throws IOException {
            BigDecimal val = (BigDecimal)obj;
            out.writeInt(val.scale());
            BigInteger unscaled = val.unscaledValue();
            byte[] bytes = unscaled.toByteArray();
            out.writeInt(bytes.length);
            out.write(bytes);
        }
        protected Object readObject(ObjectInput in) throws IOException {
            int scale = in.readInt();

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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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                        writeVarLong(b.longValue());
                    }
                } else {
                    writeByte((byte) type);
                    writeVarInt(scale);
                    byte[] bytes = b.toByteArray();
                    writeVarInt(bytes.length);
                    write(bytes, 0, bytes.length);
                }
            }
            break;

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                if (scale == 0) {
                    return 1 + getVarLongLen(b.longValue());
                }
                return 1 + getVarIntLen(scale) + getVarLongLen(b.longValue());
            }
            byte[] bytes = b.toByteArray();
            return 1 + getVarIntLen(scale) + getVarIntLen(bytes.length) + bytes.length;
        }
        case Value.TIME:
            if (SysProperties.STORE_LOCAL_TIME) {
                long nanos = ((ValueTime) v).getNanos();

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    @Test
    public void testToHex() {
        assertNull("Null uuid", ByteUtils.toHex(null));
        BigInteger x = new BigInteger("11");
        assertEquals("11 converts to 0b", "0b", ByteUtils.toHex(x.toByteArray()));
        x = new BigInteger("91341076760875801477766333660764240022");
        assertEquals("Number has been converted", "44b7a6c7f58a5dcdf1594ad7003af896", ByteUtils.toHex(x.toByteArray()));
        byte[] hex = StringUtils.encodeHex("44b7a6c7f58a5dcdf1594ad7003af896");
        assertEquals("An hex array is not recoded", "44b7a6c7f58a5dcdf1594ad7003af896", ByteUtils.toHex(hex));
    }

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    public void testToHex() {
        assertNull("Null uuid", ByteUtils.toHex(null));
        BigInteger x = new BigInteger("11");
        assertEquals("11 converts to 0b", "0b", ByteUtils.toHex(x.toByteArray()));
        x = new BigInteger("91341076760875801477766333660764240022");
        assertEquals("Number has been converted", "44b7a6c7f58a5dcdf1594ad7003af896", ByteUtils.toHex(x.toByteArray()));
        byte[] hex = StringUtils.encodeHex("44b7a6c7f58a5dcdf1594ad7003af896");
        assertEquals("An hex array is not recoded", "44b7a6c7f58a5dcdf1594ad7003af896", ByteUtils.toHex(hex));
    }


    @Test

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        assertNull(StringUtils.encodeHex(null));
        BigInteger x = new BigInteger("10");
        String uuid = "3b0ae7d419d26e36e040007f0101785c";
        assertEquals("RAW 16", 16, StringUtils.encodeHex(uuid).length);
        assertEquals("RAW 16", uuid, ByteUtils.toHex(StringUtils.encodeHex(uuid)));
        assertTrue("Number has been converted", 10 == StringUtils.encodeHex(ByteUtils.toHex(x.toByteArray()))[0]);
        String enc = "QCcyTE4v9EgCGo+kPGeI6LZ5XK0+3JLa7dC90DwKabHd9gtBd+/pJg==";
        byte[] encbytes = enc.getBytes();
        assertEquals("Encrypted data is treated ok", enc, new String(StringUtils.encodeHex(enc)));
        assertEquals("Encrypted data is treated ok", encbytes.length, StringUtils.encodeHex(ByteUtils.toHex(encbytes)).length);
        assertEquals("Encrypted data is treated ok", encbytes[0], StringUtils.encodeHex(ByteUtils.toHex(encbytes))[0]);

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    {
      byte[] kbytes = "jaas is the way".getBytes();
      SecretKeySpec key = new SecretKeySpec(kbytes, "Blowfish");
  
      BigInteger n = new BigInteger(secret, 16);
      byte[] encoding = n.toByteArray();
      
      Cipher cipher = Cipher.getInstance("Blowfish");
      cipher.init(Cipher.DECRYPT_MODE, key);
      byte[] decode = cipher.doFinal(encoding);
      return new String(decode);

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