如何在 Java 中验证 Azure B2C id token 的 JWT 签名？我已经使用 google open-id connect 成功验证了签名，但是我没有成功验证 Microsoft Azure B2C jwt id token 的签名。我在这里使用了示例 B2C playground 应用程序 https://aadb2cplayground.azurewebsites.net/ .注册并编辑我的个人资料后，我捕获了这个 ID token 。

eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSIsImtpZCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSJ9.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.MPPkvUc0bHuVyf8hr4JZ0hG0mLE2pT7maDR-10e3XR8m6FtrsmQlkgvhnzfao94jPzDzX_CnG_Asfnqv04JeIpvQXBlViO63AlfZaZVllLByeJti5Uat1WepMPz5MRydk6b2o5w_xRfl7QOI-L9Yt8r7-rQX1FMuIPfvvsUity-M-H8s0XInvihxiKEHU_wvz6U017Tgjs4qcrpILM5Ziaxfb7oSxgECl3EDWAoITDy5B-rYCH_o-7mhxHQauUYgH5dUV2MrM8iuaMPoRc3r9Xk38SyfgS1-4taK_bi_AIutyOBX4O3cWbrvGDshQbHBW4BmjctTBT-xUPWboydpuA

我指出我的 java 代码使用以下端点进行 token 验证。

https://login.microsoftonline.com/fabrikamb2c.onmicrosoft.com/discovery/v2.0/keys?p=b2c_1_sign_in

在编写本文时，这是该端点的 json。

{
  "keys": [
    {"kid":"IdTokenSigningKeyContainer","use":"sig","kty":"RSA","e":"AQAB","n":"tLDZVZ2Eq_DFwNp24yeSq_Ha0MYbYOJs_WXIgVxQGabu5cZ9561OUtYWdB6xXXZLaZxFG02P5U2rC_CT1r0lPfC_KHYrviJ5Y_Ekif7iFV_1omLAiRksQziwA1i-hND32N5kxwEGNmZViVjWMBZ43wbIdWss4IMhrJy1WNQ07Fqp1Ee6o7QM1hTBve7bbkJkUAfjtC7mwIWqZdWoYIWBTZRXvhMgs_Aeb_pnDekosqDoWQ5aMklk3NvaaBBESqlRAJZUUf5WDFoJh7yRELOFF4lWJxtArTEiQPWVTX6PCs0klVPU6SRQqrtc4kKLCp1AC5EJqPYRGiEJpSz2nUhmAQ"}
  ]
}

这是我使用的java代码

package com.example

import org.jose4j.jwk.HttpsJwks
import org.jose4j.jwt.JwtClaims
import org.jose4j.jwt.consumer.InvalidJwtException
import org.jose4j.jwt.consumer.JwtConsumer
import org.jose4j.jwt.consumer.JwtConsumerBuilder
import org.jose4j.keys.resolvers.HttpsJwksVerificationKeyResolver

class AzureB2CPOC7 {

public static talk(){

    String jwt = "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSIsImtpZCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSJ9.eyJhdWQiOiJiYjJhMmUzYS1jNWU3LTRmMGEtODhlMC04ZTAxZmQzZmMxZjQiLCJpc3MiOiJodHRwczovL3N0cy53aW5kb3dzLm5ldC83NzU1MjdmZi05YTM3LTQzMDctOGIzZC1jYzMxMWY1OGQ5MjUvIiwiaWF0IjoxNDU4NDMzMDIzLCJuYmYiOjE0NTg0MzMwMjMsImV4cCI6MTQ1ODQzNjkyMywiYW1yIjpbInB3ZCJdLCJpcGFkZHIiOiI3NC4xMzkuMjEzLjE3NSIsIm5hbWUiOiJib2I1Iiwibm9uY2UiOiJMNlNvekpjeVVEc2lYQ2t0NVQwN1NBPT0iLCJvaWQiOiJjNjc0NDA1Yy05ZGIxLTRmN2EtYTIwMy1jNzZkNDk1Zjk5ZDAiLCJwdWlkIjoiMTAwM0JGRkQ5NkQ0NThCMSIsInN1YiI6InozTGRJOWUtSFlWeXpCSl9sOE9RTndWYnRQM3BnbHBwREo3NjJ2TmEycFkiLCJ0aWQiOiI3NzU1MjdmZi05YTM3LTQzMDctOGIzZC1jYzMxMWY1OGQ5MjUiLCJ1bmlxdWVfbmFtZSI6InJib290aF9jYWxsaWJyaXR5LmNvbSNFWFQjQGZhYnJpa2FtYjJjLm9ubWljcm9zb2Z0LmNvbSIsInVwbiI6InJib290aF9jYWxsaWJyaXR5LmNvbSNFWFQjQGZhYnJpa2FtYjJjLm9ubWljcm9zb2Z0LmNvbSIsInZlciI6IjEuMCJ9.MPPkvUc0bHuVyf8hr4JZ0hG0mLE2pT7maDR-10e3XR8m6FtrsmQlkgvhnzfao94jPzDzX_CnG_Asfnqv04JeIpvQXBlViO63AlfZaZVllLByeJti5Uat1WepMPz5MRydk6b2o5w_xRfl7QOI-L9Yt8r7-rQX1FMuIPfvvsUity-M-H8s0XInvihxiKEHU_wvz6U017Tgjs4qcrpILM5Ziaxfb7oSxgECl3EDWAoITDy5B-rYCH_o-7mhxHQauUYgH5dUV2MrM8iuaMPoRc3r9Xk38SyfgS1-4taK_bi_AIutyOBX4O3cWbrvGDshQbHBW4BmjctTBT-xUPWboydpuA";
    HttpsJwks httpsJkws = new HttpsJwks("https://login.microsoftonline.com/fabrikamb2c.onmicrosoft.com/discovery/v2.0/keys?p=b2c_1_sign_in");
    HttpsJwksVerificationKeyResolver httpsJwksKeyResolver = new HttpsJwksVerificationKeyResolver(httpsJkws);
    JwtConsumer jwtConsumer = new JwtConsumerBuilder()
            .setRequireExpirationTime() // the JWT must have an expiration time
            .setAllowedClockSkewInSeconds(3600) // allow some leeway in validating time based claims to account for clock skew
            .setRequireSubject() // the JWT must have a subject claim
            .setExpectedIssuer("https://sts.windows.net/775527ff-9a37-4307-8b3d-cc311f58d925/") // whom the JWT needs to have been issued by
            .setExpectedAudience("bb2a2e3a-c5e7-4f0a-88e0-8e01fd3fc1f4") // to whom the JWT is intended for
            .setVerificationKeyResolver(httpsJwksKeyResolver)
            .build();

    try
    {
        //  Validate the JWT and process it to the Claims
        JwtClaims jwtClaims = jwtConsumer.processToClaims(jwt);
        System.out.println("JWT validation succeeded! " + jwtClaims);
    }
    catch (InvalidJwtException e)
    {
        // InvalidJwtException will be thrown, if the JWT failed processing or validation in anyway.
        // Hopefully with meaningful explanations(s) about what went wrong.
        System.out.println("Invalid JWT! " + e);
    }
}
}

起初，我收到此错误消息“无法为带有 header 的 JWS 找到合适的验证 key ”。因此，我创建了一个本地 Web 服务器并从 Microsoft json 端点复制了 json，但我将“kid”:“IdTokenSigningKeyContainer”替换为“kid”:“MnC_VZcATfM5pOYiJHMba9goEKY”。

该更改修复了“无法为带 header 的 JWS 找到合适的验证 key ”错误消息，但我收到以下错误，而不是“JWS 签名无效”。

我正在寻找一个 java 解决方案来验证上面列出的 jwt id token 的签名。提前致谢。

最佳答案

尝试使用 https://login.microsoftonline.com/fabrikamb2c.onmicrosoft.com/discovery/v2.0/keys对于 HTTPS JWKS 位置。那里有一个不同的 key ，它有一个与 JWT 中的内容匹配的 kid 和 x5t。

关于java - 如何在 Java 中验证 Azure B2C id token 的 JWT 签名？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36110265/