LDAP Libraries for C

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This section provides example sample code for how to enable Authentication against a Directory Services using LDAP Libraries for C

// Sample code file: bind.c
// Warning: This code has been marked up for HTML
   
/* $Novell: /ldap/src/cldap/samples/bind.c,v 1.3 2000/08/21 22:59:04 vtag Exp $ */
/*********************************************************************
   
Copyright 1999, 2000 Novell, Inc. All Rights Reserved.
   
With respect to this file, Novell hereby grants to Developer a 
royalty-free, non-exclusive license to include this sample code 
and derivative binaries in its product. Novell grants to Developer 
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sample code file and derivative binaries as a component of 
Developer's product(s). Novell shall have no obligations to 
Developer or Developer's customers with respect to this code.
   
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***********************************************************************
bind.c
***********************************************************************
Description: The bind.c sample demonstrates both an anonymous and 
        simple LDAP v3 bind to an LDAP server.
**********************************************************************/
   
#include <stdio.h>
#include <stdlib.h>
#include <ldap.h>
   
static char usage[] =
"\nUsage:  bind <host name> <port number> <login dn> <password>" 
"\nExample: bind Acme.com cn=admin,o=Acme secret\n";
   
int main( int argc, char **argv)
{ 
   int     rc, ldapPort, version;
   char     *ldapHost, *loginDN, *password;
   LDAP     *ld;
   
   if (argc != 5)
   {
      printf("%s", usage);
      return (1);
   }
   
   ldapHost   =  argv[1];
   ldapPort   =  atoi(argv[2]);
   loginDN    =  argv[3];
   password   =  argv[4];
   
       /* 
   * Set LDAP version to 3.
   * Using a NULL session handle sets the global options.
   * All subsequent sessions in this process will be version 3.
   */
   version = LDAP_VERSION3;
   ldap_set_option( NULL, LDAP_OPT_PROTOCOL_VERSION, &version);
   
       /* 
   * Initialize the LDAP session 
   */
   if (( ld = ldap_init( ldapHost, ldapPort )) == NULL)
   {
      printf ( "\n\tLDAP session initialization failed\n");
      return( 1 );
   }
   printf ( "\n\tLDAP session initialized\n");
   
   /* 
   * Bind to the server anonymously 
   */
   if(( rc = ldap_simple_bind_s( ld, NULL, NULL )) != LDAP_SUCCESS )
   {
      printf("\n\tldap_simple_bind_s: %s\n", ldap_err2string( rc ));
      ldap_unbind_s( ld );
      return ( 1 );
   }
   printf("\n\tAnonymous bind successful\n");
   
   ldap_unbind_s( ld );
   
   
       /* 
   * Initialize a new LDAP session 
   */
   if (( ld = ldap_init( ldapHost, ldapPort )) == NULL)
   {
      printf ( "\n\tLDAP session initialization failed\n");
      return( 1 );
   }
   printf ( "\n\tNew LDAP session initialized\n");
   
       /* 
   * Simple bind to the server 
   */
   if ((rc = ldap_simple_bind_s( ld, loginDN, password )) != LDAP_SUCCESS )
   {
      printf("\n\tldap_simple_bind_s: %s\n", ldap_err2string( rc ));
      ldap_unbind_s( ld );
      return ( 1 );
   }
   printf("\n\tBind and authentication to the server successful\n");
   
   ldap_unbind_s( ld );    
   
   return ( 0 );
}