Package org.keycloak.jose.jwk

Class JWKUtil

java.lang.Object

org.keycloak.jose.jwk.JWKUtil

public class JWKUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
JWKUtil()

Method Summary

Modifier and Type	Method	Description
static byte[]	toIntegerBytes(BigInteger bigInt)	Converts BigInteger to 64-byte array removing the sign byte if necessary.
static byte[]	toIntegerBytes(BigInteger bigInt, int bitlen)	Converts BigInteger to 64-byte array but maintaining the length to bitlen as specified in rfc7518 for certain fields (X and Y parameter for EC keys).

Methods inherited from class java.lang.Object

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

Constructor Details

JWKUtil

public JWKUtil()

Method Details

toIntegerBytes

public static byte[] toIntegerBytes(BigInteger bigInt)

Converts BigInteger to 64-byte array removing the sign byte if necessary.

Parameters:

bigInt - BigInteger to be converted

Returns:

Byte array representation of the BigInteger parameter

toIntegerBytes

public static byte[] toIntegerBytes(BigInteger bigInt,
 int bitlen)

Converts BigInteger to 64-byte array but maintaining the length to bitlen as specified in rfc7518 for certain fields (X and Y parameter for EC keys).

Parameters:

bigInt - BigInteger to be converted

bitlen - The bit length size of the integer (for example 521 for EC P-521)

Returns:

Byte array representation of the BigInteger parameter with length (bitlen + 7) / 8

Throws:

IllegalStateException - if the big integer is longer than bitlen