验证Azure AD令牌签名失败JAVA

Question

验证Azure AD令牌签名失败JAVA

javaazureactive-directorydigital-signatureaccess-token

8

我在验证Azure AD令牌签名时遇到了困难。

当我查找“jwks_uri”字段下的正确密钥描述时，

在https://login.microsoftonline.com/common/.well-known/openid-configuration中，

我检查所属的密钥数据。

我尝试使用“n” - 模数和“e”字段生成公钥用于签名验证，但结果出现错误。

BASE64Decoder decoder = new BASE64Decoder();        
byte[] modulusBytes = decoder.decodeBuffer(n);
byte[] exponentBytes = decoder.decodeBuffer(e);

BigInteger modulusInt = new BigInteger(1, modulusBytes);
BigInteger exponentInt = new BigInteger(1, exponentBytes);

try {
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    RSAPublicKeySpec publicSpec = new RSAPublicKeySpec(modulusInt, exponentInt);
RSAPublicKey pubKey = (RSAPublicKey)keyFactory.generatePublic(publicSpec);
Jwt<Header, String> c = Jwts.parser().setSigningKey(pubKey).parsePlaintextJwt(token);

} catch (Exception ex) {
  ex.printStackTrace();
}

控制台：

io.jsonwebtoken.SignatureException: Unable to verify RSA signature using configured PublicKey. Signature length not correct: got 256 but was expecting 246
at io.jsonwebtoken.impl.crypto.RsaSignatureValidator.isValid(RsaSignatureValidator.java:50)
at io.jsonwebtoken.impl.crypto.DefaultJwtSignatureValidator.isValid(DefaultJwtSignatureValidator.java:47)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:351)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:481)
at io.jsonwebtoken.impl.DefaultJwtParser.parsePlaintextJwt(DefaultJwtParser.java:503)
at com.ge.hc.pfh.poc.ams.filter.JwtFilter.doFilter(JwtFilter.java:120)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.ge.hc.pfh.poc.ams.filter.ApiOriginFIlter.doFilter(ApiOriginFIlter.java:28)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.ge.hc.pfh.poc.ams.filter.MDCFilter.doFilter(MDCFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

我尝试了另一种方法来使用“x5c”字段，该字段是一个base64编码的证书链：

byte[] certChain = Base64.getDecoder().decode(x5c);
X509Certificate cert = X509CertUtils.parse(certChain);
PublicKey pubKeyNew = cert.getPublicKey();
Claims claims3 = Jwts.parser()
          .setSigningKey(pubKeyNew)
            .parseClaimsJws(token).getBody();

我遇到了另一个错误：

io.jsonwebtoken.SignatureException: JWT signature does not match locally computed signature. JWT validity cannot be asserted and should not be trusted.
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:354)
at io.jsonwebtoken.impl.DefaultJwtParser.parse(DefaultJwtParser.java:481)
at io.jsonwebtoken.impl.DefaultJwtParser.parsePlaintextJwt(DefaultJwtParser.java:503)
at com.ge.hc.pfh.poc.ams.filter.JwtFilter.doFilter(JwtFilter.java:106)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.ge.hc.pfh.poc.ams.filter.ApiOriginFIlter.doFilter(ApiOriginFIlter.java:28)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at com.ge.hc.pfh.poc.ams.filter.MDCFilter.doFilter(MDCFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

有人知道我做错了什么吗？谢谢。

- HDCase

你尝试过在微软官方推荐的库列表中列出的ADAL库吗？链接在这里：https://learn.microsoft.com/en-us/azure/active-directory/active-directory-authentication-libraries - Guy Bouallet

1个回答

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- pedrofb · Accepted Answer

第一个示例

https://login.microsoftonline.com/common/discovery/keys中的模数和指数（n和e）是以base64url编码而不是base64编码的，因此解码它们的代码应该是：

byte[] modulusBytes = Base64.getUrlDecoder().decode(n);
BigInteger modulusInt = new BigInteger(1, modulusBytes);

不要使用旧的 com.sun.misc.BASE64Decoder

如果JWT已签名，不应使用 JWTParser.plaintextJwt()。根据文档：

plaintextJwt：一个紧凑的序列化未签名的纯文本JWT字符串

应该改用 parseClaimsJws 或 parsePlaintextJws 方法。只有在有效载荷为非 JSON 字符串时才使用第二种方法。

第二个例子

第二个示例基本正确。我假设 X509CertUtils.parse(certChain) 类似于

 InputStream in = new ByteArrayInputStream(certChain);
 CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
 X509Certificate cert = (X509Certificate)certFactory.generateCertificate(in);

证书的模数和指数与解码后的相同，因此公钥是等效的。

链接中有两个相似的证书，请检查两者。您应该能够验证签名。如果不能，则该令牌未使用这些密钥进行签名。