io.smallrye.jwt.algorithm.SignatureAlgorithm Maven / Gradle / Ivy

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package io.smallrye.jwt.algorithm;

import java.util.StringJoiner;

/**
 * JWT JSON Web Signature Algorithms.
 *
 * @see https://tools.ietf.org/html/rfc7518#section-3
 */
public enum SignatureAlgorithm {
    RS256("RS256"),
    RS384("RS384"),
    RS512("RS512"),
    ES256("ES256"),
    ES384("ES384"),
    ES512("ES512"),
    EDDSA("EdDSA"),
    HS256("HS256"),
    HS384("HS384"),
    HS512("HS512"),
    PS256("PS256"),
    PS384("PS384"),
    PS512("PS512");

    private final String algorithmName;

    SignatureAlgorithm(String algorithmName) {
        this.algorithmName = algorithmName;
    }

    public String getAlgorithm() {
        return algorithmName;
    }

    public static SignatureAlgorithm fromAlgorithm(String algorithmName) {
        try {
            return SignatureAlgorithm.valueOf(algorithmName.toUpperCase());
        } catch (Exception e) {
            throw new IllegalArgumentException(
                    "Invalid signature algorithm name: " + algorithmName + ", expected one of: " + getValidNames(), e);
        }
    }

    private static String getValidNames() {
        var names = new StringJoiner(", ");
        for (var alg : values()) {
            names.add(alg.getAlgorithm());
        }
        return names.toString();
    }
}