IBM发出Kerberos:无法在JAAS中使用credsType=both验证keytab

Question

我有一个服务到服务模型，其中有一个用于Kerberos身份验证的keytab。

在这个模型中，我定义了一个登录配置如下：

import java.util.HashMap;
import java.util.Map;

import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.Configuration;

public class GSSIbmLoginConfiguration extends Configuration {

private AppConfigurationEntry configEntry;

public GSSIbmLoginConfiguration(String principal, 
                                String credentialCache, 
                                String keytab, 
                                KerberosCredentialUsage usage) {
    Map<String, String> params = new HashMap<String, String>();

    params.put("credsType", "both");
    params.put("renewable", Boolean.TRUE.toString());
    params.put("principal", principal);

    if (credentialCache != null) {
        params.put("useCcache", credentialCache);
    }

    if (keytab != null) {
        params.put("useKeytab", keytab);
    }

    configEntry = new AppConfigurationEntry(
            "com.ibm.security.auth.module.Krb5LoginModule",
            AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, params);
}

public AppConfigurationEntry[] getAppConfigurationEntry(String name) {
    return new AppConfigurationEntry[] {
            configEntry
    };
}

此登录配置充当jaas.conf的替代品。

现在，我正在尝试LoginContext的登录方法，该方法正在工作。然后，我将从中获得主题。

现在利用这个主题，我做了一个特权的行动。

private static final class SubjectAction implements PrivilegedExceptionAction<GSSCredential> {

    private final int credentialType;

    private final int credentialLifetime;

    private SubjectAction(int credType, int lifetime) {
        credentialType = credType;
        credentialLifetime = lifetime;
    }

    public GSSCredential run() throws GSSException {
                    GSSManager gssManager = GSSManager.getInstance()
        return gssManager.createCredential(null, credentialLifetime, KRB5_MECH_ID, GSSCredential.INITIATE_AND_ACCEPT);      
    }
}

这是失败的。相关的日志(我在设置日志系统属性后挖掘出的日志)：-

[JGSS_DBG_CRED]  localhost-startStop-1 Creating mech cred for null, mech 1.2.840.113554.1.2.2, usage initiate and accept
[JGSS_DBG_PROV]  localhost-startStop-1 Provider Entry: provider: IBMJGSSProvider, mechanism: 1.3.6.1.5.5.2 get Factory for mech: 1.2.840.113554.1.2.2 GSSCaller:
[JGSS_DBG_PROV]  localhost-startStop-1 Provider Entry: provider: IBMJGSSProvider, mechanism: 1.2.840.113554.1.2.2 get Factory for mech: 1.2.840.113554.1.2.2 GSSCaller:
[JGSS_DBG_PROV]  localhost-startStop-1 Created new (empty) factory list (size=1) for provider IBMJGSSProvider version 7.0
[JGSS_DBG_PROV]  localhost-startStop-1 Loading factory
[JGSS_DBG_PROV]  localhost-startStop-1 Factory class name for provider IBMJGSSProvider version 7.0 is com.ibm.security.jgss.mech.krb5.Krb5MechFactory
[JGSS_DBG_PROV]  localhost-startStop-1 Prior to load
[JGSS_DBG_PROV]  localhost-startStop-1 Done to load
[JGSS_DBG_PROV]  localhost-startStop-1 Loaded factory for provider IBMJGSSProvider version 7.0
[JGSS_DBG_PROV]  localhost-startStop-1 Loaded factory ok
[JGSS_DBG_PROV]  localhost-startStop-1 getFactory: index = 1 found factory caller = com.ibm.security.jgss.GSSCaller@e7d4b6d7
[JGSS_DBG_CRED]  localhost-startStop-1  usage: initiate and subject
[JGSS_DBG_CRED]  localhost-startStop-1 Obtaining creds from Krb5Util.ServiceCreds for default service
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for isp/ISPNode1/ISPDomain@INFAKRB.INFADEV.COM(1)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for    isp/ISPNode1/ISPDomain@INFAKRB.INFADEV.COM(23)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for isp/ISPNode1/ISPDomain@INFAKRB.INFADEV.COM(3)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for isp/ISPNode1/ISPDomain@INFAKRB.INFADEV.COM(17)
[JGSS_DBG_CRED]  localhost-startStop-1 acquiring creds for isp/ISPNode1/ISPDomain@INFAKRB.INFADEV.COM

现在真正令人困惑的是：-

[JGSS_DBG_CRED]  localhost-startStop-1 Creating mech cred for null, mech 1.2.840.113554.1.2.2, usage initiate and accept
and then:
[JGSS_DBG_PROV]  localhost-startStop-1 getFactory: index = 1 found factory caller = com.ibm.security.jgss.GSSCaller@e7d4b6d7
[JGSS_DBG_CRED]  localhost-startStop-1  usage: initiate and subject

第一部分是createCredential本身。但是，第二种方法似乎适用于某些机制工厂相关的调用(在本例中为kerberos)。现在，在这个基于文件的信用缓存之后，auth被启动了。

[KRB_DBG_CCHE] FileCredentialsCache:localhost-startStop-1:   >>>KinitOptions cache name is /export/home/ispqa95/krb5cc_ispqa95
[KRB_DBG_CCHE] FileCredentialsCache:localhost-startStop-1:   >>> FileCredentialsCache default name is: /export/home/ispqa95/krb5cc_ispqa95
[KRB_DBG_CCHE] FileCredentialsCache:localhost-startStop-1:   >>>FileCredentialsCache: read ccache version 0x503
[KRB_DBG_KDC] KrbDataInputStream:localhost-startStop-1:   >>>KrbDataInputStream: Bytes read: 0000: 49 4e 46 41 4b 52 42 2e  49 4e 46 41 44 45 56 2e  INFAKRB.INFADEV.

0010: 43 4f 4d COM

[KRB_DBG_KDC] KrbDataInputStream:localhost-startStop-1:   >>> CCacheInputStream: equiv string: INFAKRB.INFADEV.COM
[KRB_DBG_CCHE] CCacheInputStream:localhost-startStop-1:   >>> readPrincipal: read realm INFAKRB.INFADEV.COM
[KRB_DBG_KDC] KrbDataInputStream:localhost-startStop-1:   >>>KrbDataInputStream: Bytes read: 0000: 6e 61 67 61 72 6c 61                               nagarla

这就意味着机械工厂得到了错误的价值。

我尝试过反编译IBM (ibmjgssprovider.jar)，但是里面的类名似乎被混淆了(用a、b、xy等替换)。

这最终导致：- java.io.IOException:主主体不匹配

作为一个比较幸运的人，我很难理解IBM的行为。OpenJdk剂量有很大帮助。

有人能帮忙吗。是我的产品设置的某个系统属性会导致这样的行为吗？

我试图在执行时检查所有可能的系统属性。如果还需要什么，请告诉我。

另外，有人也能指出一些IBM安全论坛吗？我也想在这里发表这个问题。

Answer 1

好吧，我想出了解决这个问题的方法：-

系统属性：

-Djavax.security.auth.useSubjectCredsOnly=true 

必须在启动期间设置，否则IBM使用的凭据是默认凭据(在AIX情况下，它尝试从基于文件的凭据缓存中获取凭据)