Keyclope Kerberos身份验证：机制级别：无效参数（400）-找不到适当类型的密钥以使用HMAC解密AP REP-RC4

Question

我有以下内容

1. JBoss EAP 7.2.2上的spring web应用程序-Machine CentOs
2. CentOs上的KeyClope 3.3.4
3. Active directory

我们在OpenJDK 8上运行

用户使用其Active目录帐户从Windows计算机登录。

Keycloak配置了kerberos使用联合。在CentOs机器上，使用

yum install krb5-user krb5-doc
yum install krb5-pkinit krb5-workstation
yum install krb5-libs krb5-devel
yum install krb5-server krb5-workstation pam_krb5

在keycloak用户联合中，keytab文件路径和其他配置是正确的。这由keycloak日志文件确认。领域：XYZ. COM服务器主体HTTP/principal-name@REALM

键表文件是使用

ktpass.exe /out file.keytab /mapuser user-name@REALM /mapop set /princ HTTP/principal-name@REALM /ptype KRB5_NT_PRINCIPAL /pass XXXXXX /crypto RC4-HMAC-NT

在krb5.conf输入以下内容

default_tgs_enctypes = arcfour-hmac
default_tkt_enctypes = arcfour-hmac
permitted_enctypes = arcfour-hmac

问题是登录时我们得到了异常

Looking for keys for: HTTP/principal-name@REALM
2020-02-24 09:34:06,327 WARN  [org.keycloak.federation.kerberos.impl.SPNEGOAuthenticator] (default task-13) SPNEGO login failed: java.security.PrivilegedActionException: 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 java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.keycloak.federation.kerberos.impl.SPNEGOAuthenticator.authenticate(SPNEGOAuthenticator.java:68)
at org.keycloak.storage.ldap.LDAPStorageProvider.authenticate(LDAPStorageProvider.java:677)
at org.keycloak.credential.UserCredentialStoreManager.authenticate(UserCredentialStoreManager.java:296)
at org.keycloak.authentication.authenticators.browser.SpnegoAuthenticator.authenticate(SpnegoAuthenticator.java:89)
at org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:200)
at org.keycloak.authentication.AuthenticationProcessor.authenticateOnly(AuthenticationProcessor.java:853)
at org.keycloak.authentication.AuthenticationProcessor.authenticate(AuthenticationProcessor.java:722)
at org.keycloak.protocol.AuthorizationEndpointBase.handleBrowserAuthenticationRequest(AuthorizationEndpointBase.java:145)

at ...
Caused by: 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:856)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285)
at sun.security.jgss.spnego.SpNegoContext.GSS_acceptSecContext(SpNegoContext.java:906)
at sun.security.jgss.spnego.SpNegoContext.acceptSecContext(SpNegoContext.java:556)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285)
at org.keycloak.federation.kerberos.impl.SPNEGOAuthenticator.establishContext(SPNEGOAuthenticator.java:169)
at org.keycloak.federation.kerberos.impl.SPNEGOAuthenticator$AcceptSecContext.run(SPNEGOAuthenticator.java:132)
at org.keycloak.federation.kerberos.impl.SPNEGOAuthenticator$AcceptSecContext.run(SPNEGOAuthenticator.java:122)
... 72 more
Caused by: 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:278)
at sun.security.krb5.KrbApReq.<init>(KrbApReq.java:149)
at sun.security.jgss.krb5.InitSecContextToken.<init>(InitSecContextToken.java:108)
at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:829)
... 81 more

2020-02-24 09:34:06,328 INFO  [stdout] (default task-13)        [Krb5LoginModule]: Entering logout
2020-02-24 09:34:06,328 INFO  [stdout] (default task-13)        [Krb5LoginModule]: logged out Subject

我已经做了很多研究，很遗憾地排除了所有可能的原因。完成了以下测试：klist-k{key-tab文件的路径}-e

结果4 HTTP/principal-name@REALMArcfine-hmac在Active目录中，msDS-KeyVersionNumber=4

kinit HTTP/principal-name@REALMklist-e

结果：... Etype（skey， TKT）arcfine-hmac， es256-cts-hmac-sha1-96

总之，Keycloak能够读取keytab，但无法查找解密密钥。

有人能帮忙吗？

我已经看过这篇文章Kerberos-找不到合适类型的密钥来用HMAC解密AP REP-RC4

以及以下链接：https://bugs.openjdk.java.net/browse/JDK-8193855

和许多其他帖子，但没有成功。

Answer 1

您正在使用以下配置：/crypto RC4-HMAC-NT

我有同样的错误，因为keytab文件是用错误的/crypto配置生成的。


在GSS-API级别未指定故障（机制级别：无效参数（400）
无法找到适当类型的密钥以使用HMAC解密AP-REQ-RC4）

您可以尝试使用ktpass命令生成一个新的keytab文件。