Novell LDAP C# - Novell.Directory.Ldap - 有没有人让它工作？

Question

我正在尝试使用Novell发布的库(Novell.Directory.Ldap).版本2.1.10.

到目前为止我做了什么:

• 我测试了与应用程序(LdapBrowser)的连接并且它正在工作,因此它不是通信问题.

• 它是用Mono编译的,但我正在使用Visual Studio.所以用源创建了一个项目.我还提到了对Mono.Security的引用,因为该项目取决于它.

• 我在连接的错误捕获部分中评论了一个调用(freeWriteSemaphore(semId);),因为它抛出了更多异常.我检查了那个调用做了什么,它只是一个错误跟踪机制.

• 我按照Novell(http://www.novell.com/coolsolutions/feature/11204.html)文档中提供的基本步骤进行操作.

  //创建LdapConnection实例

  LdapConnection ldapConn = new LdapConnection(); ldapConn.SecureSocketLayer = ldapPort == 636;

  // Connect函数将创建与服务器的套接字连接

  ldapConn.Connect(ldapHost,ldapPort);

  //绑定功能将用户对象凭据绑定到服务器

  ldapConn.Bind(用户DN,userPasswd);

• 现在它正在崩溃Bind()函数.我收到错误91.

那么,有人曾经使用过这个库并看到它有效吗？如果是这样,你做了什么让它工作,是否需要一些特殊的配置？有没有办法让它在没有Mono的.NET环境中工作(我可以引用Mono dll,但我不希望它安装在服务器上)？

(更新)连接在端口636上,因此使用SSL.我查看了WireShark的通信,并与我从LDAP浏览器中获得的内容进行了比较.我已经看到,SSL证书的通信步骤不是由LDAP库完成的.那么,让它做到它应该做的最好的方法是什么？

(更新)我检查了文档,它表明它不支持SSL.http://www.novell.com/coolsolutions/feature/11204.html

使用LdapConnection.Bind()对LDAP服务器进行身份验证.我们仅支持明文身份验证.尚未添加SSL/TLS支持.

但是文档的日期是2004年,从那时起,已经进行了许多更新.并且库中有一个参数来定义连接是否使用SSL.所以现在我很困惑.

(更新)找到了更新的文档:http://developer.novell.com/documentation//ldapcsharp/index.html？page = / documentation //ldapcsharp/cnet/data/bqwa5p0.html.建立SSL连接的方式是在服务器上注册证书.问题是我正在做的事情并没有绑定到特定的Novell服务器,因此必须动态获取证书.

Answer 1

我来寻找类似问题的解决方案。当使用Novell网站上的相同代码时，我的bind命令也会失败。对我有用的解决方案是添加动态证书验证回叫。你可以在这里阅读。

        // Creating an LdapConnection instance 
        LdapConnection ldapConn = new LdapConnection();

        ldapConn.SecureSocketLayer = true;

        ldapConn.UserDefinedServerCertValidationDelegate += new
                CertificateValidationCallback(MySSLHandler);


        //Connect function will create a socket connection to the server
        ldapConn.Connect(ldapHost, ldapPort);

        //Bind function will Bind the user object Credentials to the Server
        ldapConn.Bind(userDN, userPasswd);

        // Searches in the Marketing container and return all child entries just below this
        //container i.e. Single level search
        LdapSearchResults lsc = ldapConn.Search("ou=users,o=uga",
                           LdapConnection.SCOPE_SUB,
                           "objectClass=*",
                           null,
                           false);

        while (lsc.hasMore())
        {
            LdapEntry nextEntry = null;
            try
            {
                nextEntry = lsc.next();
            }
            catch (LdapException e)
            {
                Console.WriteLine("Error: " + e.LdapErrorMessage);
                // Exception is thrown, go for next entry
                continue;
            }
            Console.WriteLine("\n" + nextEntry.DN);
            LdapAttributeSet attributeSet = nextEntry.getAttributeSet();
            System.Collections.IEnumerator ienum = attributeSet.GetEnumerator();
            while (ienum.MoveNext())
            {
                LdapAttribute attribute = (LdapAttribute)ienum.Current;
                string attributeName = attribute.Name;
                string attributeVal = attribute.StringValue;
                Console.WriteLine(attributeName + "value:" + attributeVal);
            }
        }
        ldapConn.Disconnect();
        Console.ReadKey();
    }

public static bool MySSLHandler(Syscert.X509Certificate certificate,
            int[] certificateErrors)
        {

            X509Store store = null;
            X509Stores stores = X509StoreManager.CurrentUser;
            //string input;
            store = stores.TrustedRoot;

            X509Certificate x509 = null;
            X509CertificateCollection coll = new X509CertificateCollection();
            byte[] data = certificate.GetRawCertData();
            if (data != null)
                x509 = new X509Certificate(data);

            return true;
        }

Answer 2

UserDefinedServerCertValidationDelegate 已过时，因此如果是无效 ssl 证书的问题，您可以通过以下方式跳过证书验证：

        LdapConnectionOptions options = new LdapConnectionOptions()
            .ConfigureRemoteCertificateValidationCallback(new CertCallback((a, b, c, d) => true))
            .UseSsl();

        LdapConnection connection = new LdapConnection(options);

        connection.Connect(...);
       

但是，您应该检查忽略证书是否是您的应用程序的安全解决方案。

Answer 3

我终于找到了一种方法来完成这项工作。

首先，这些帖子帮助我走上了正确的道路：http://directoryprogramming.net/forums/thread/788.aspx

其次，我获得了 Novell LDAP 库的已编译 dll，并使用了 Mono.Security.Dll。

解决方案：

我在代码中添加了这个函数

// This is the Callback handler - after "Binding" this is called
        public bool MySSLHandler(Syscert.X509Certificate certificate, int[] certificateErrors)
        {

            X509Store store = null;
            X509Stores stores = X509StoreManager.LocalMachine;
            store = stores.TrustedRoot;

            //Import the details of the certificate from the server.

            X509Certificate x509 = null;
            X509CertificateCollection coll = new X509CertificateCollection();
            byte[] data = certificate.GetRawCertData();
            if (data != null)
                x509 = new X509Certificate(data);

            //List the details of the Server

            //if (bindCount == 1)
            //{

            Response.Write("<b><u>CERTIFICATE DETAILS:</b></u> <br>");
            Response.Write("  Self Signed = " + x509.IsSelfSigned + "  X.509  version=" + x509.Version + "<br>");
            Response.Write("  Serial Number: " + CryptoConvert.ToHex(x509.SerialNumber) + "<br>");
            Response.Write("  Issuer Name:   " + x509.IssuerName.ToString() + "<br>");
            Response.Write("  Subject Name:  " + x509.SubjectName.ToString() + "<br>");
            Response.Write("  Valid From:    " + x509.ValidFrom.ToString() + "<br>");
            Response.Write("  Valid Until:   " + x509.ValidUntil.ToString() + "<br>");
            Response.Write("  Unique Hash:   " + CryptoConvert.ToHex(x509.Hash).ToString() + "<br>");
            // }

            bHowToProceed = true;
            if (bHowToProceed == true)
            {
                //Add the certificate to the store. This is \Documents and Settings\program data\.mono. . .
                if (x509 != null)
                    coll.Add(x509);
                store.Import(x509);
                if (bindCount == 1)
                    removeFlag = true;
            }

            if (bHowToProceed == false)
            {
                //Remove the certificate added from the store.

                if (removeFlag == true && bindCount > 1)
                {
                    foreach (X509Certificate xt509 in store.Certificates)
                    {
                        if (CryptoConvert.ToHex(xt509.Hash) == CryptoConvert.ToHex(x509.Hash))
                        {
                            store.Remove(x509);
                        }
                    }
                }
                Response.Write("SSL Bind Failed.");
            }
            return bHowToProceed;
        }

我在绑定过程中使用了它

// Create Connection
                LdapConnection conn = new LdapConnection();
                conn.SecureSocketLayer = true;
                Response.Write("Connecting to:" + ldapHost);

                conn.UserDefinedServerCertValidationDelegate += new
                    CertificateValidationCallback(MySSLHandler);

                if (bHowToProceed == false)
                    conn.Disconnect();
                if (bHowToProceed == true)
                {
                    conn.Connect(ldapHost, ldapPort);
                    conn.Bind(loginDN, password);
                    Response.Write(" SSL Bind Successfull ");

                    conn.Disconnect();
                }
                quit = false;

关键要素是使用 SSL Handler 动态获取证书，并使用 X509StoreManager.LocalMachine 以便在网站运行时能够保存和获取证书。