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This is a drop in replacement for the auth0 java-jwt library (see https://github.com/auth0/java-jwt). This jar makes sure there are no external dependencies (e.g. fasterXml, Apacha Commons) needed. This is useful when deploying to an application server (e.g. tomcat with Alfreso or Pega).

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package com.auth0.jwt.algorithms;

import com.auth0.jwt.exceptions.SignatureGenerationException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.interfaces.DecodedJWT;
import org.apache.commons.codec.binary.Base64;

class NoneAlgorithm extends Algorithm {

    NoneAlgorithm() {
        super("none", "none");
    }

    @Override
    public void verify(DecodedJWT jwt) throws SignatureVerificationException {
        byte[] signatureBytes = Base64.decodeBase64(jwt.getSignature());
        if (signatureBytes.length > 0) {
            throw new SignatureVerificationException(this);
        }
    }

    @Override
    public byte[] sign(byte[] contentBytes) throws SignatureGenerationException {
        return new byte[0];
    }
}