JWKUtil (Keycloak Docs Distribution 21.1.1 API)

java.lang.Object
- org.keycloak.jose.jwk.JWKUtil

```
public class JWKUtil
extends Object
```

Constructor Summary

Constructors
Constructor Description

JWKUtil()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static byte[]`	`toIntegerBytes(BigInteger bigInt)`	Coverts `BigInteger` to 64-byte array removing the sign byte if necessary.
`static byte[]`	`toIntegerBytes(BigInteger bigInt, int bitlen)`	Coverts `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 Detail
  - JWKUtil
```
public JWKUtil()
```
- Method Detail
  - toIntegerBytes
```
public static byte[] toIntegerBytes(BigInteger bigInt)
```
    Coverts 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)
```
    Coverts 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