Thank you so much, Rich, for your reply.

In this call

        char *cert_path="/path/to/ldap_certdb";

        rc = ldap_set_option( ld, LDAP_OPT_X_TLS_CACERTDIR, &cert_path);

        printf("rc=ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTDIR, %s)=%d, error=%s\n",

                cert_path, rc, ldap_err2string(rc));

/path/to/ldap_certdb is actually a directory, the files under it are like this:

% ls –altr /path/to/ldap_certdb

total 56

-rw-r--r--   1 dmadmin dmadmin 16384 Sep 14  2010 secmod.db

-rw-r--r--   1 dmadmin dmadmin 16384 Sep 14  2010 key3.db

-rw-r--r--   1 dmadmin dmadmin 16384 Sep 14  2010 cert7.db

drwx------  27 dmadmin dmadmin  4096 Aug 30 22:14 ../

drwxr-xr-x   2 dmadmin dmadmin  4096 Aug 30 22:14 ./

%

My simple test program (for testing LDAP SSL connection to AD server) using Mozilla LDAP C-SDK looks something like this (this test program works, connecting to AD over SSL works fine):

   if (ldapssl_client_init("/path/to/ldap_certdb", NULL ) < 0)

   {

     perror("ldapssl_client_init");

     return 1;

   }

    ld = ldapssl_init( host, port, 1);

    if ( ld == NULL )

    {

      perror("ldapssl_init");

      return 1;

    }

    if ((rc = ldap_simple_bind_s( ld, bind_dn, bind_password)) != LDAP_SUCCESS)

    {

      ldap_perror(ld, "ldap_simple_bind_s");

      return 1;

    }

However, the following equivalent code using OpenLDAP (built with RSA Share Adpator and RSA MES) does not work.  It failed with error “ldap_sasl_bind_s: Can't contact LDAP server (-1) error:14090086:SSL routines: SSL3_GET_SERVER_CERTIFICATE:certificate verify failed”

        ldap_initialize( &ld, uri );

        if ( ld == NULL ) {

                tester_perror( "ldap_initialize", NULL );

                exit( EXIT_FAILURE );

        }

        rc = ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version );

        printf("rc=ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, %d)=%d, error=%s\n",

                version, rc, ldap_err2string(rc));

        rc = ldap_set_option( ld, LDAP_OPT_REFERRALS,

                chaserefs ? LDAP_OPT_ON : LDAP_OPT_OFF );

        printf("rc=ldap_set_option(ld, LDAP_OPT_REFERRALS, %d)=%d, error=%s\n",

                chaserefs, rc, ldap_err2string(rc));

        int debug_flag1 = -1; // LDAP_DEBUG_ANY ;

        rc = ldap_set_option( ld, LDAP_OPT_DEBUG_LEVEL, &debug_flag1);

        printf("rc=ldap_set_option(ld, LDAP_OPT_DEBUG_LEVEL, %d)=%d, error=%s\n",

                debug_flag1, rc, ldap_err2string(rc));

        char *cert_path="/path/to/ldap_certdb"; // this is directory

        rc = ldap_set_option( ld, LDAP_OPT_X_TLS_CACERTDIR, &cert_path);

        printf("rc=ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTDIR, %s)=%d, error=%s\n",

                cert_path, rc, ldap_err2string(rc));

        int reqcert = LDAP_OPT_X_TLS_ALLOW;

        rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &reqcert);

        printf("rc=ldap_set_option(ld, LDAP_OPT_X_TLS_REQUIRE_CERT, %d)=%d, error=%s\n",

                 reqcert, rc, ldap_err2string(rc));

         rc = ldap_sasl_bind_s( ld, manager, LDAP_SASL_SIMPLE, passwd, NULL, NULL, NULL );

         if ( rc != LDAP_SUCCESS ) {

           tester_ldap_error( ld, "ldap_sasl_bind_s", NULL );

           switch ( rc ) {

             case LDAP_BUSY:

             case LDAP_UNAVAILABLE:

               /* fallthru */

             default:

               break;

           }

           exit( EXIT_FAILURE );

         }

From: Rich Megginson [mailto:rich.megginson@gmail.com]
Sent: Tuesday, August 30, 2011 6:27 PM
To: Wu, Daisy
Cc: openldap-technical@openldap.org; openldap-devel-request@openldap.org
Subject: Re: OpenLDAP client test program connecting to LDAP server over SSL failed

On 08/30/2011 07:09 PM, daisy.wu@emc.com wrote:

I am trying to write a simple client test program using OpenLDAP client API to connect to Microsoft Active Directory Server over SSL.

Below is code snippet.  The program failed to connect.

It failed because of this error: ldap_sasl_bind_s: Can't contact LDAP server (-1) error:14090086:SSL routines: SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

I know there’s no problem with LDAP certificate store /path/to/ldap_certdb because a simple LDAP client test program written in Mozilla LDAP C-SDK worked fine connecting to this same AD server, over SSL.

I need to know if I am using the correct OpenLDAP client API calls.

Yes, but it looks like you are using OpenLDAP built with openssl, not Mozilla NSS.  If your OpenLDAP is provided by some vendor, and you cannot change/rebuild with moznss support, you'll have to export the CA certificate(s) from the /path/to/ldap_certdb and pass them to OpenLDAP with either a single file and LDAP_OPT_X_TLS_CACERTFILE or an openssl style ca cert dir with LDAP_OPT_X_TLS_CACERTDIR.

Any input would be much appreciated. 

Thanks.

Source Code:

        ldap_initialize( &ld, uri );

        if ( ld == NULL ) {

                tester_perror( "ldap_initialize", NULL );

                exit( EXIT_FAILURE );

        }

        rc = ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version );

        printf("rc=ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, %d)=%d, error=%s\n",

                version, rc, ldap_err2string(rc));

        rc = ldap_set_option( ld, LDAP_OPT_REFERRALS,

                chaserefs ? LDAP_OPT_ON : LDAP_OPT_OFF );

        printf("rc=ldap_set_option(ld, LDAP_OPT_REFERRALS, %d)=%d, error=%s\n",

                chaserefs, rc, ldap_err2string(rc));

        int debug_flag1 = -1; // LDAP_DEBUG_ANY ;

        rc = ldap_set_option( ld, LDAP_OPT_DEBUG_LEVEL, &debug_flag1);

        printf("rc=ldap_set_option(ld, LDAP_OPT_DEBUG_LEVEL, %d)=%d, error=%s\n",

                debug_flag1, rc, ldap_err2string(rc));

        char *cert_path="/path/to/ldap_certdb";

        rc = ldap_set_option( ld, LDAP_OPT_X_TLS_CACERTDIR, &cert_path);

        printf("rc=ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTDIR, %s)=%d, error=%s\n",

                cert_path, rc, ldap_err2string(rc));

        int reqcert = LDAP_OPT_X_TLS_ALLOW;

        rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &reqcert);

        printf("rc=ldap_set_option(ld, LDAP_OPT_X_TLS_REQUIRE_CERT, %d)=%d, error=%s\n",

                 reqcert, rc, ldap_err2string(rc));

         rc = ldap_sasl_bind_s( ld, manager, LDAP_SASL_SIMPLE, passwd, NULL, NULL, NULL );

         if ( rc != LDAP_SUCCESS ) {

           tester_ldap_error( ld, "ldap_sasl_bind_s", NULL );

           switch ( rc ) {

             case LDAP_BUSY:

             case LDAP_UNAVAILABLE:

               /* fallthru */

             default:

               break;

           }

           exit( EXIT_FAILURE );

         }

Here’s program output:

rc=ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, 3)=0, error=Success

rc=ldap_set_option(ld, LDAP_OPT_REFERRALS, 0)=0, error=Success

rc=ldap_set_option(ld, LDAP_OPT_DEBUG_LEVEL, -1)=0, error=Success

rc=ldap_set_option(ld, LDAP_OPT_X_TLS_CACERTDIR, /path/to/ldap_certdb)=0, error=Success

rc=ldap_set_option(ld, LDAP_OPT_X_TLS_REQUIRE_CERT, 3)=0, error=Success

PID=4781 - Search(2): base="OU=people,OU=documentum,DC=adldap112,DC=dctmlabs,DC=com", filter="cn=aduser2*" attr="cn".

slapd-search PID=4781: ldap_sasl_bind_s: Can't contact LDAP server (-1) error:14090086:SSL routines: SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

From: Wu, Daisy
Sent: Friday, August 26, 2011 4:53 PM
To: openldap-technical@openldap.org; 'openldap-devel-request@openldap.org'
Subject: Need sample OpenLDAP client test program connecting to LDAP server over SSL

Hi, OpenLDAP developers,

Do you have any sample test programs (or code snippets) that uses OpenLDAP client API to connect to LDAP server over SSL?

Thanks in advance.

Daisy