java - Google OAuth2 JWT token 验证异常

Question

我在上一小时面临 OAuth2 JWT token 验证异常(所以没有人可以访问我的应用程序):

java.security.SignatureException:签名长度不正确:得到 256 但预期为 128。我正在使用 google-http-client 1.20.0 和 Java 1.7.0。到目前为止，相同的配置有效 - 有什么想法吗？

Stacktrace

java.security.SignatureException: Signature length not correct: got 256 but was expecting 128
    at sun.security.rsa.RSASignature.engineVerify(Unknown Source) ~[na:1.7.0_45]
    at java.security.Signature$Delegate.engineVerify(Unknown Source) ~[na:1.7.0_45]
    at java.security.Signature.verify(Unknown Source) ~[na:1.7.0_45]
    at com.google.api.client.util.SecurityUtils.verify(SecurityUtils.java:164) ~[google-http-client-1.20.0.jar:1.20.0]

Answer 1

这里同样的问题，我把GoogleIdTokenVerifier的源代码加到我的项目中，改了方法:

 public boolean verify(GoogleIdToken googleIdToken) throws GeneralSecurityException, IOException {
    // check the payload
    if (!super.verify(googleIdToken)) {
      return false;
    }
    // verify signature
    for (PublicKey publicKey : publicKeys.getPublicKeys()) {
      try {
        if (googleIdToken.verifySignature(publicKey)) {
            return true;
          }
    } catch (Exception e) {
        System.err.println("Verify Token:" + e);
    }
    }
    return false;
  }

只处理异常，第二个证书工作正常。

编辑:您可以子类为 Erik-z如果你想让它更干净，建议:

编辑 2:我无法使用下面的代码使其工作，我将坚持上面的丑陋 hack。

package com.my.project.package;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.PublicKey;

import com.google.api.client.auth.openidconnect.IdTokenVerifier;
import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken;
import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;

// Remember to remove this class later by making it deprecated
@Deprecated
public class GoogleIdTokenVerifier2 extends GoogleIdTokenVerifier {

    // Add constructors as needed
    public GoogleIdTokenVerifier2(HttpTransport transport, JsonFactory jsonFactory) {
        super(transport, jsonFactory);
    }

    @Override
    public boolean verify(GoogleIdToken googleIdToken) throws GeneralSecurityException, IOException {
        // check the payload
        if (!((IdTokenVerifier)this).verify(googleIdToken)) {
            return false;
        }
        // verify signature
        for (PublicKey publicKey : getPublicKeysManager().getPublicKeys()) {
            try {
                if (googleIdToken.verifySignature(publicKey)) {
                    return true;
                }
            } catch (Exception e) {
                System.err.println("Verify Token:" + e);
            }
        }
        return false;
    }
}