Question

我正在尝试使用从身份验证服务器（OpenId）检索到的公钥来验证访问令牌签名客户端从同一服务器获取访问令牌，然后使用它请求我的资源服务器API。现在我必须使用Spring Security库检查它的签名访问令牌具有“alg”：“RS256”属性但是下面的代码仍然不成功，我总是得到InvalidSignatureException ...

import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.RSAPublicKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.jwt.JwtHelper;
import org.springframework.security.jwt.crypto.sign.InvalidSignatureException;
import org.springframework.security.jwt.crypto.sign.RsaVerifier;

public class JWTValidation {

    private static final Logger logger = LoggerFactory.getLogger(JWTValidation.class);

    private static final String PUBLIC_KEY_MODULUS = "qOYyKKnoUpXd2qIj8A0tdumWwnDbVjXOVaPfiX5lxBvYEtgWPLknf1Nftdk371a7f1jD8SFFDxXnj-PPFx8qoNETOITvbR12uvWmS1J36B5Uo_ViHp7dC-GaZG_EdafyK0rxRPvK8b37NPXWhTggbxCZhYaqJUMb1t0xogDadEyM95lZweEXrwsJNzoyXiGnPfsRgy32TjOOXIMZnAMoj-osYd2WawymkRV6cteo3f8KMT72_kp8oG-kGm1s3ZooEfI3_9Z2jHVGWQLUWbmZKIrvjuUo2dhmqWWsNyTO3RsF4qyrRCpmZNawDf_GsioBTZ3vfPF_T58moH7cJ50Byw";
    private static final String PUBLIC_KEY_PUBLIC_EXPONENT = "AQAB";

    //Public key =
//  {
//      "keys":[
//          {
//            "kty":"RSA",
//            "use":"sig",
//            "kid":"DQr-GCc8rH3y5fkAuo0iau-ue-s",
//            "x5t":"DQr-GCc8rH3y5fkAuo0iau-ue-s",
//            "e":"AQAB",
//            "n":"qOYyKKnoUpXd2qIj8A0tdumWwnDbVjXOVaPfiX5lxBvYEtgWPLknf1Nftdk371a7f1jD8SFFDxXnj-PPFx8qoNETOITvbR12uvWmS1J36B5Uo_ViHp7dC-GaZG_EdafyK0rxRPvK8b37NPXWhTggbxCZhYaqJUMb1t0xogDadEyM95lZweEXrwsJNzoyXiGnPfsRgy32TjOOXIMZnAMoj-osYd2WawymkRV6cteo3f8KMT72_kp8oG-kGm1s3ZooEfI3_9Z2jHVGWQLUWbmZKIrvjuUo2dhmqWWsNyTO3RsF4qyrRCpmZNawDf_GsioBTZ3vfPF_T58moH7cJ50Byw",
//            "x5c":["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"]
//          }
//      ]
//  }

    //Access Token = base64url encoded String
    public boolean verifySignature(String accessToken){

        try {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");          
            Base64 decoder = new Base64(true);//URL-safe Base64 decoder

            BigInteger modulus = new BigInteger(decoder.decode(PUBLIC_KEY_MODULUS.getBytes()));
            BigInteger publicExponent = new BigInteger(decoder.decode(PUBLIC_KEY_PUBLIC_EXPONENT.getBytes()));

            RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, publicExponent);
            PublicKey newPublicKey = keyFactory.generatePublic(spec);

            RsaVerifier verif = new RsaVerifier((RSAPublicKey) newPublicKey, "SHA256withRSA");
            JwtHelper.decodeAndVerify(accessToken, verif);

        } catch (InvalidSignatureException e){
            logger.info(e.getMessage());
            return false;
        } catch (Exception e){
            logger.info(e.getMessage());
            return false;
        }

        return true;
    }
}

我还尝试使用在线工具jwt.io，但我无法使其正常工作（签名仍无效）
对于另一个（tool_jwt），拥有有效签名的唯一方法是选择“默认X.509证书RSA”，并在我的公钥“x5c”值附近添加注释：

所以我现在不知道该怎么做，我应该使用哪个公钥属性，以及如何使它工作？

非常感谢您的帮助：）

Answer 1

除了RSA密钥规范

之外，我还使用了x509密钥规范

RSAPublicKeySpec spec = new RSAPublicKeySpec(new BigInteger(modulusBytes), new BigInteger(exponentBytes));
KeyFactory factory = KeyFactory.getInstance("RSA"); 
PublicKey key = factory.generatePublic(spec);


X509EncodedKeySpec X509publicKey = new X509EncodedKeySpec(key.getEncoded());
KeyFactory kf = KeyFactory.getInstance("RSA");
PublicKey pubKey64 = kf.generatePublic(X509publicKey);

这适用于auth0和jwt.io库

Answer 2

要使用jwt.io在线验证签名，只需在其中放置以下json作为公钥：

{
     "kty":"RSA",
     "kid":"DQr-GCc8rH3y5fkAuo0iau-ue-s",
     "e":"AQAB",
     "n":"qOYyKKnoUpXd2qIj8A0tdumWwnDbVjXOVaPfiX5lxBvYEtgWPLknf1Nftdk371a7f1jD8SFFDxXnj-PPFx8qoNETOITvbR12uvWmS1J36B5Uo_ViHp7dC-GaZG_EdafyK0rxRPvK8b37NPXWhTggbxCZhYaqJUMb1t0xogDadEyM95lZweEXrwsJNzoyXiGnPfsRgy32TjOOXIMZnAMoj-osYd2WawymkRV6cteo3f8KMT72_kp8oG-kGm1s3ZooEfI3_9Z2jHVGWQLUWbmZKIrvjuUo2dhmqWWsNyTO3RsF4qyrRCpmZNawDf_GsioBTZ3vfPF_T58moH7cJ50Byw"
}

JWT签名验证

2 个答案: