为 J2EE、.NET、Java™、Web Service 客户机创建用于 HTTP 请求的 SPNEGO 令牌

可以为您的应用程序创建“简单且受保护的 GSS-API 协商”(SPNEGO) 令牌并将此令牌插入到 HTTP 头中,以向 WebSphere® Application Server 认证。

过程

  1. 创建客户机 GSS 凭证。选择下列 4 个选项中的一项:
    1. 为 Kerberos 凭证高速缓存创建 GSS 凭证。 例如:
              System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
              Oid krb5MechOid    = new Oid("1.2.840.113554.1.2.2");
              Oid spnegoMechOid  = new Oid("1.3.6.1.5.5.2"); 
      
              GSSManager manager = GSSManager.getInstance();
              GSSName gssUserName = manager.createName(userName, GSSName.NT_USER_NAME, krb5MechOid);
              clientGssCreds = manager.createCredential(gssUserName.canonicalize(krb5MechOid), 
                                                            GSSCredential.INDEFINITE_LIFETIME, 
                                                            krb5MechOid, 
                                                            GSSCredential.INITIATE_ONLY);
              clientGssCreds.add (gssUserName,
                                  GSSCredential.INDEFINITE_LIFETIME, 
                                  GSSCredential.INDEFINITE_LIFETIME, 
                                  spnegoMechOid, 
                                  GSSCredential.INITIATE_ONLY);
    2. 为具有 Kerberos 凭单的主体集创建 GSS 凭证。 例如:
             Oid krb5MechOid    = new Oid("1.2.840.113554.1.2.2");
             Oid spnegoMechOid  = new Oid("1.3.6.1.5.5.2"); 
      
             GSSManager manager = GSSManager.getInstance();
             clientGssCreds = (GSSCredential) Subject.doAs(subject, new PrivilegedExceptionAction() 
             {
                 public Object run() throws GSSException, Exception  
                 {
                     try {
                         gssName = manager.createName( userName,
                                                       GSSName.NT_USER_NAME,
                                                       getKrb5MechOid());
                         GSSCredential gssCred = manager.createCredential(
                                                         gssName.canonicalize(krb5MechOid),
                                                         GSSCredential.DEFAULT_LIFETIME,
                                                         krb5MechOid,
                                                         GSSCredential.INITIATE_ONLY);
                         gssCred.add (gssUserName,
                                      GSSCredential.INDEFINITE_LIFETIME, 
                                      GSSCredential.INDEFINITE_LIFETIME, 
                                      spnegoMechOid, 
                                      GSSCredential.INITIATE_ONLY);
      
                         return gssCred;
                     } catch (GSSException gsse) {
                     } catch (Exception e) {
                     }
      
                     return null;
                 }
             });
    3. 在调用 WSKRB5Login 登录模块后创建 GSS 凭证。 例如:
             Oid krb5MechOid    = new Oid("1.2.840.113554.1.2.2");
             Oid spnegoMechOid  = new Oid("1.3.6.1.5.5.2"); 
      
             System.setProperty("javax.security.auth.useSubjectCredsOnly", "true");
             GSSManager manager = GSSManager.getInstance();
             GSSName gssUserName = manager.createName(userName, GSSName.NT_USER_NAME, krb5MechOid);
             clientGssCreds = manager.createCredential(gssUserName.canonicalize(krb5MechOid), 
                                                       GSSCredential.INDEFINITE_LIFETIME, 
                                                       krb5MechOid, 
                                                       GSSCredential.INITIATE_ONLY);
             clientGssCreds.add (gssUserName,
                                 GSSCredential.INDEFINITE_LIFETIME, 
                                 GSSCredential.INDEFINITE_LIFETIME, 
                                 spnegoMechOid, 
                                 GSSCredential.INITIATE_ONLY);
    4. 使用 Microsoft 本机 Kerberos 凭证高速缓存创建 GSS 凭证。 例如:
             Oid krb5MechOid    = new Oid("1.2.840.113554.1.2.2");
             Oid spnegoMechOid  = new Oid("1.3.6.1.5.5.2"); 
      
             System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
             GSSManager manager = GSSManager.getInstance();
             
             clientGssCreds = manager.createCredential(null,
                                                        GSSCredential.INDEFINITE_LIFETIME,
                                                        krb5MechOid,
                                                        GSSCredential.INITIATE_ONLY);
      
             clientGssCreds.add(null,
                                GSSCredential.INDEFINITE_LIFETIME, 
                                GSSCredential.INDEFINITE_LIFETIME, 
                                spnegoMechOid, GSSCredential.INITIATE_ONLY);
      注: MSLSA:凭证高速缓存依靠能力来抽取整个 Kerberos 凭单,包括 Kerberos LSA 的会话密钥。&nbsp. 在尝试提高安全性时,Microsoft 已经开始实现一种功能。通过该功能,它们不再为凭单获取凭单导出会话密钥,这将导致在尝试请求附加服务凭单时,它们对于 IBM® JGSS 而言没有用。此新功能已存在于 Windows 2003 Server 和 Windows XP SP2 Beta 中。Microsoft 提供了以下注册表键以禁用此功能:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\Kerberos\Parameters
      AllowTGTSessionKey = 0x01 (DWORD)
      在 Windows XP SP2 Beta 1 上,该键指定为:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\Kerberos
      AllowTGTSessionKey = 0x01 (DWORD)
  2. 创建客户机 GSS 凭证后,您就可以创建 SPNEGO 令牌并将其插入 HTTP 头中,如下列所示:
           // create target server SPN
           GSSName gssServerName = manager.createName(targetServerSpn, GSSName.NT_USER_NAME);
    
           GSSContext clientContext = manager.createContext(gssServerName.canonicalize(spnegoMechOid),
                                                      spnegoMechOid,
                                                      clientGssCreds,
                                                      GSSContext.DEFAULT_LIFETIME);
           // optional enable GSS credential delegation
           clientContext.requestCredDeleg(true);
    
           byte[] spnegoToken = new byte[0];
    
           // create a SPNEGO token for the target server
           spnegoToken = clientContext.initSecContext(spnegoToken, 0, spnegoToken.length);
    
           URL url = new URL(targetUrl);
           HttpURLConnection con= (HttpURLConnection) url.openConnection();
    
           try {
               // insert SPNEGO token in the HTTP header
               con.setRequestProperty("Authorization", "Negotiate " + Base64.encode(spnegoToken));
               con.getResponseCode();          
           } catch (IOException e) {
           } catch (Exception ex) {
           }

结果

您的应用程序可能需要 Kerberos 配置文件(krb5.inikrb5.conf)。请参阅[AIX Solaris HP-UX Linux Windows]创建 Kerberos 配置文件以了解更多信息。


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