IBM Jdk问题Kerberos:在JAAS无法使用credsType=both对keytab进行身份验证

Question

我有一个服务到服务模型，其中我有一个 Kerberos 身份验证的密钥表。

在这个模型中，我定义了一个登录配置，如下所示：-

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
    };
}

此登录配置可替代jaas.conf

现在我正在尝试登录上下文的登录方法，这是有效的。然后我从中获取主题。

现在使用这个主题，我执行特权操作。

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);      
    }
}

这失败了。相关日志（我在设置日志系统属性后找到的）：-

[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/[e-mail](1)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for    isp/ISPNode1/[e-mail](23)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for isp/ISPNode1/[e-mail](3)
[JGSS_DBG_CRED]  localhost-startStop-1 Found key for isp/ISPNode1/[e-mail](17)
[JGSS_DBG_CRED]  localhost-startStop-1 acquiring creds for isp/ISPNode1/[e-mail]

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

第一部分是创建证书本身。然而，第二个似乎是针对某些与机制工厂相关的调用（在这种情况下是 kerberos）。现在，在此之后，基于文件的信誉缓存身份验证正在启动。

[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

这意味着机制工厂以某种方式获得了错误的价值。

我尝试反编译IBMjars（ibmjgssprovider.jar），但似乎里面的类名是乱码（由a、b、xy等替换）。

这最终导致：-java.io.IOException：主要原则不匹配

作为一名自卫者，我很难弄清楚IBM的行为。打开Jdk多森特帮助很大。

有人可以帮忙吗？我的产品正在设置的某些系统属性是否会导致此类行为？

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。

也可以有人指向一些IBM JDK安全论坛吗？我也想在那里发布这个问题。

Answer 1

好了，我知道如何解决这个问题了

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（如果是AIX，它会尝试从基于文件的凭据缓存中获取）