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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.asn1.its;

import java.math.BigInteger;

import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.util.BigIntegers;

/**
 *  *     Uint16 ::= INTEGER (0..65535)
 *
 *     IValue ::= Uint16
 * 
 */
public class IValue
    extends ASN1Object
{
    private final BigInteger value;

    private IValue(ASN1Integer value)
    {
        int i = BigIntegers.intValueExact(value.getValue());

        if (i < 0 || i > 65535)
        {
            throw new IllegalArgumentException("value out of range");
        }

        this.value = value.getValue();
    }

    public static IValue getInstance(Object src)
    {
        if (src instanceof IValue)
        {
            return (IValue)src;
        }
        else if (src != null)
        {
            return new IValue(ASN1Integer.getInstance(src));
        }

        return null;
    }

    public ASN1Primitive toASN1Primitive()
    {
        return new ASN1Integer(value);
    }
}