Kerberos-无法找到适当类型的密钥来解密带有HMAC的AP REP-RC4

Question

我正在尝试使用Kerberos / SpNego为Java WebApp设置SSO。我正在使用：

• Java 1.7u67
• org.springframework.security.kerberos 1.0.0.RELEASE
• 活动目录
• Linux上的Tomcat 7

克服了如何在Tomcat /Linux服务器上配置kerberos中描述的问题之后？，我现在遇到以下错误：

org.springframework.security.authentication.BadCredentialsException: Kerberos validation not succesful
        at org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator.validateTicket(SunJaasKerberosTicketValidator.java:70) ~[spring-security-kerberos-core-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        at org.springframework.security.kerberos.authentication.KerberosServiceAuthenticationProvider.authenticate(KerberosServiceAuthenticationProvider.java:64) ~[spring-security-kerberos-core-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:156) ~[spring-security-core-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.kerberos.web.authentication.SpnegoAuthenticationProcessingFilter.doFilter(SpnegoAuthenticationProcessingFilter.java:145) ~[spring-security-kerberos-web-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) [spring-security-web-3.2.7.RELEASE.jar:3.2.7.RELEASE]
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.55]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.55]
        at org.lightadmin.core.view.TilesContainerEnrichmentFilter.doFilterInternal(TilesContainerEnrichmentFilter.java:40) [lightadmin-1.2.0.RC1.jar:1.2.0.RC1]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.55]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.55]
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.55]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.55]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.55]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.55]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) [catalina.jar:7.0.55]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.55]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.55]
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) [catalina.jar:7.0.55]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.55]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) [catalina.jar:7.0.55]
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) [tomcat-coyote.jar:7.0.55]
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) [tomcat-coyote.jar:7.0.55]
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) [tomcat-coyote.jar:7.0.55]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_67]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_67]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.55]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
Caused by: java.security.PrivilegedActionException: null
        at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_67]
        at javax.security.auth.Subject.doAs(Subject.java:415) ~[na:1.7.0_67]
        at org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator.validateTicket(SunJaasKerberosTicketValidator.java:67) ~[spring-security-kerberos-core-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        ... 42 common frames omitted
Caused by: org.ietf.jgss.GSSException: Failure unspecified at GSS-API level (Mechanism level: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - RC4 with HMAC)
        at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:788) ~[na:1.7.0_67]
        at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342) ~[na:1.7.0_67]
        at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285) ~[na:1.7.0_67]
        at sun.security.jgss.spnego.SpNegoContext.GSS_acceptSecContext(SpNegoContext.java:875) ~[na:1.7.0_67]
        at sun.security.jgss.spnego.SpNegoContext.acceptSecContext(SpNegoContext.java:548) ~[na:1.7.0_67]
        at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342) ~[na:1.7.0_67]
        at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285) ~[na:1.7.0_67]
        at org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator$KerberosValidateAction.run(SunJaasKerberosTicketValidator.java:162) ~[spring-security-kerberos-core-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        at org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator$KerberosValidateAction.run(SunJaasKerberosTicketValidator.java:152) ~[spring-security-kerberos-core-1.0.0.RELEASE.jar:1.0.0.RELEASE]
        ... 45 common frames omitted
Caused by: sun.security.krb5.KrbException: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - RC4 with HMAC
        at sun.security.krb5.KrbApReq.authenticate(KrbApReq.java:273) ~[na:1.7.0_67]
        at sun.security.krb5.KrbApReq.<init>(KrbApReq.java:144) ~[na:1.7.0_67]
        at sun.security.jgss.krb5.InitSecContextToken.<init>(InitSecContextToken.java:108) ~[na:1.7.0_67]
        at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:771) ~[na:1.7.0_67]
        ... 53 common frames omitted

但是似乎密钥应该在那儿，因为在应用程序启动时我得到了以下调试信息：

  Debug is  true storeKey true useTicketCache false useKeyTab true doNotPrompt true ticketCache is null isInitiator false KeyTab is /opt/pksvc/tomcat_edl/current/conf/TestSpnego.keytab refreshKrb5Config is false principal is [e-mail] tryFirstPass is false useFirstPass is false storePass is false clearPass is false
principal is [e-mail]
Will use keytab
>>> KeyTabInputStream, readName(): MYREALM.DE
>>> KeyTabInputStream, readName(): HTTP
>>> KeyTabInputStream, readName(): lxdetstpksvc01.mydomain.de
>>> KeyTab: load() entry length: 83; type: 23
Ordering keys wrt default_tkt_enctypes list
Java config name: /opt/pksvc/tomcat_edl/current/conf/krb5.conf
Loaded from Java config
default etypes for default_tkt_enctypes: 23.
Commit Succeeded

因此，带有HMAC的enctype 23 =
RC4是KeyTab条目的类型和默认的enctype。我还可以看到浏览器发送带有此enctype的令牌（我从以下代码中删除了二进制部分）：

Ticket  TicketType{TktVno=5,Realm=MYREALM.DE,Sname=HTTP/lxdetstpksvc01.mydomain.de,EncPart=EncryptedData{Etype=23,Kvno=4,Cipher=binary[...  352 16728   KerberosV5.TicketType   
Authenticator   EncryptedData{Etype=23,Kvno=nothing,Cipher=binary[...   17080   2872    KerberosV5.EncryptedData

因此，所有内容似乎都是enttpe23（带有HMAC的RC4）。当我看一下代码时，我发现KrbApReq使用的sun.security.krb5.EncryptionKey（在上面的堆栈中引发错误）确实不仅在比较enctype，而且还在比较版本。因此，我想这就是我的情况必须犯的错误。在上面的票证中，EncryptedData为Kvno= 4，对于Authenticator EncryptedData为Kvno = nothing。这些应该匹配吗？

我该如何解决？这受密钥表生成的影响吗？

Answer 1

原来，上述错误是由两个问题引起的：

1. 弹簧配置中的服务主体是错误的。它是[e-mail]，但是 HTTP/[e-mail] 是正确的。

2. 密钥表中的Kvno与活动目录中存储的Kvno不同。如https://tomcat.apache.org/tomcat-7.0-doc/windows-auth-howto.html所述， Active Directory在每次执行ktpass时都会提高Kvno。但是我无法在广告中找到它的值（msDS-KeyVersionNumber），只能从请求中获取它。

归纳为以下问题之一导致的“找不到合适类型的密钥来解密…”错误：

1. spring安全配置中的主要服务与keytab中的服务（ktpass的param / princ）不同。
2. AD没有使用其发送票证的加密类型的密钥（来自ktpass的参数/ crypto，并在krb5.conf / permitted_enctypes + default_tkt_enctypes中设置）。
3. 票证中的Kvno与密钥表中的Kvno不同（ktpass中的参数/ kvno）。
4. 密钥表的路径错误（请参阅Xavier Portebois的回答）
5. 该过程没有读取密钥表的权限