// 
// Decompiled by Procyon v0.6.0
// 

package com.nimbusds.jose.crypto.impl;

import java.util.LinkedHashSet;
import com.nimbusds.jose.JOSEException;
import java.util.Collections;
import com.nimbusds.jose.jwk.Curve;
import com.nimbusds.jose.JWSAlgorithm;
import java.util.Set;

public abstract class ECDSAProvider extends BaseJWSProvider
{
    public static final Set<JWSAlgorithm> SUPPORTED_ALGORITHMS;
    public static final Set<Curve> SUPPORTED_CURVES;
    
    protected ECDSAProvider(final JWSAlgorithm alg) throws JOSEException {
        super(Collections.singleton(alg));
        if (!ECDSAProvider.SUPPORTED_ALGORITHMS.contains(alg)) {
            throw new JOSEException("Unsupported EC DSA algorithm: " + alg);
        }
    }
    
    public JWSAlgorithm supportedECDSAAlgorithm() {
        return this.supportedJWSAlgorithms().iterator().next();
    }
    
    static {
        final Set<JWSAlgorithm> algs = new LinkedHashSet<JWSAlgorithm>();
        algs.add(JWSAlgorithm.ES256);
        algs.add(JWSAlgorithm.ES256K);
        algs.add(JWSAlgorithm.ES384);
        algs.add(JWSAlgorithm.ES512);
        SUPPORTED_ALGORITHMS = Collections.unmodifiableSet((Set<? extends JWSAlgorithm>)algs);
        final Set<Curve> curves = new LinkedHashSet<Curve>();
        curves.add(Curve.P_256);
        curves.add(Curve.SECP256K1);
        curves.add(Curve.P_384);
        curves.add(Curve.P_521);
        SUPPORTED_CURVES = Collections.unmodifiableSet((Set<? extends Curve>)curves);
    }
}