org.forgerock.json.jose.utils

Class BigIntegerUtils

java.lang.Object

org.forgerock.json.jose.utils.BigIntegerUtils

public final class BigIntegerUtils
extends Object

Utils to complement bit operations not covered by the BigInteger functions.

Method Summary

Modifier and Type	Method and Description
static BigInteger	base64UrlDecode(String magnitudeBase64UrlEncoded) Decode a big-endian base64 url encoding of a magnitude big integer and transform it as a positive big integer.
static String	base64UrlEncodeUnsignedBigEndian(BigInteger number) Encode a big integer into a base 64 url encoded unsigned big endian.
static byte[]	toBytesUnsigned(BigInteger x) Returns the unsigned big-endian byte array of a big integer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

toBytesUnsigned

public static byte[] toBytesUnsigned(BigInteger x)

Returns the unsigned big-endian byte array of a big integer. Any leading zero sign byte is removed.

Parameters:

x - a big integer

Returns:

the unsigned big-endian byte array of x

base64UrlDecode

public static BigInteger base64UrlDecode(String magnitudeBase64UrlEncoded)

Decode a big-endian base64 url encoding of a magnitude big integer and transform it as a positive big integer.

Parameters:

magnitudeBase64UrlEncoded - big-endian base64 url encoding of a big integer magnitude

Returns:

a positive big integer with the decoded magnitude.

base64UrlEncodeUnsignedBigEndian

public static String base64UrlEncodeUnsignedBigEndian(BigInteger number)

Encode a big integer into a base 64 url encoded unsigned big endian.

Parameters:

number - a big integer

Returns:

big-endian base64 url encoding of a big integer magnitude