OpenLDAP con CSharp

En mi empresa hemos empezado a trabajar con OpenLDAP, y esto implica cambiar todos los metodos de autenticacion de los sistemas desarrollados, a éste protocolo.

Al principio parecia dificil, pero no fue asi. Todo se hizo mas facil con la ayuda de algunos articulos de stackoverflow.

Al final pude armar una clase helper que me permitiera acceder a los elementos del LDAP:

public class LDAPHelper
{
    private readonly LdapConnection ldapConnection;
    private readonly string searchBaseDN;
    private readonly int pageSize;

    public LDAPHelper(
        string searchBaseDN,
        string hostName,
        int portNumber,
        AuthType authType,
        string connectionAccountName,
        string connectionAccountPassword,
        int pageSize)
    {

        var ldapDirectoryIdentifier = new LdapDirectoryIdentifier(
            hostName,
            portNumber,
            true,
            false);

        var networkCredential = new NetworkCredential(
            connectionAccountName,
            connectionAccountPassword);

        ldapConnection = new LdapConnection(
            ldapDirectoryIdentifier,
            networkCredential)
        { AuthType = authType };

        ldapConnection.SessionOptions.ProtocolVersion = 3;

        this.searchBaseDN = searchBaseDN;
        this.pageSize = pageSize;
    }

    public IEnumerable<SearchResultEntryCollection> PagedSearch(
        string searchFilter,
        string[] attributesToLoad)
    {

        var pagedResults = new List<SearchResultEntryCollection>();

        var searchRequest = new SearchRequest
                (searchBaseDN,
                    searchFilter,
                    SearchScope.Subtree,
                    attributesToLoad);


        var searchOptions = new SearchOptionsControl(SearchOption.DomainScope);
        searchRequest.Controls.Add(searchOptions);

        var pageResultRequestControl = new PageResultRequestControl(pageSize);
        searchRequest.Controls.Add(pageResultRequestControl);

        while (true)
        {
            var searchResponse = (SearchResponse)ldapConnection.SendRequest(searchRequest);
            var pageResponse = (PageResultResponseControl)searchResponse.Controls[0];

            yield return searchResponse.Entries;
            if (pageResponse.Cookie.Length == 0)
                break;

            pageResultRequestControl.Cookie = pageResponse.Cookie;
        }


    }
}

Con ésta clase, la consulta a los elementos del LDAP fue sencilla:

static void Main(string[] args)
        {
            try
            {
                var baseOfSearch = "dc=integrate,dc=com,dc=bo";
                var ldapHost = "192.168.0.101";
                var ldapPort = 389;
                var connectAsDN = "cn=admin,dc=integrate,dc=com,dc=bo";
                var pageSize = 1000;
                var secureString = "CONTRASEÑA_ADMIN_LDAP";

                var openLDAPHelper = new LDAPHelper(
                    baseOfSearch,
                    ldapHost,
                    ldapPort,
                    AuthType.Basic,
                    connectAsDN,
                    secureString,
                    pageSize);

                var searchFilter = "objectclass=posixAccount";
                //var searchFilter = "uid=rvera";
                var attributesToLoad = new[] { "sn","uid","cn","userPassword" };
                var pagedSearchResults = openLDAPHelper.PagedSearch(
                    searchFilter,
                    attributesToLoad);

                foreach (var searchResultEntryCollection in pagedSearchResults)
                    foreach (SearchResultEntry searchResultEntry in searchResultEntryCollection)
                    {
                        Console.WriteLine(searchResultEntry.Attributes["uid"][0] + ": " +
                                          searchResultEntry.Attributes["cn"][0]);
                        Console.WriteLine(searchResultEntry.Attributes["userPassword"][0]);
                        Console.WriteLine(".......");
                    }
            }
            catch (Exception exp)
            {
                Console.WriteLine(exp.Message);
                Console.WriteLine(exp.StackTrace);
            }

            Console.WriteLine("Presione una tecla para terminar...");
            Console.Read();
        }

Pueden obtener el ejemplo aqui

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Alonzo Vera

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