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LDAP_BIND(3)									     LDAP_BIND(3)

       ldap_bind,   ldap_bind_s,   ldap_simple_bind,   ldap_simple_bind_s,  ldap_kerberos_bind_s,
       ldap_kerberos_bind1,  ldap_kerberos_bind1_s,  ldap_kerberos_bind2,  ldap_kerberos_bind2_s,
       ldap_sasl_bind,		     ldap_sasl_bind_s,		    ldap_sasl_interactive_bind_s,
       ldap_parse_sasl_bind_result, ldap_unbind, ldap_unbind_s - LDAP bind routines

       OpenLDAP LDAP (libldap, -lldap)

       #include <ldap.h>

       int ldap_bind(LDAP *ld, const char *who, const char *cred,
	      int method);

       int ldap_bind_s(LDAP *ld, const char *who, const char *cred,
	      int method);

       int ldap_simple_bind(LDAP *ld, const char *who, const char *passwd);

       int ldap_simple_bind_s(LDAP *ld, const char *who, const char *passwd);

       int ldap_kerberos_bind_s(LDAP *ld, const char *who);

       int ldap_kerberos_bind1(LDAP *ld, const char *who);

       int ldap_kerberos_bind1_s(LDAP *ld, const char *who);

       int ldap_kerberos_bind2(LDAP *ld, const char *who);

       int ldap_kerberos_bind2_s(LDAP *ld, const char *who);

       int ldap_sasl_bind(LDAP *ld, const char *dn, const char *mechanism,
	      struct berval *cred, LDAPControl *sctrls[],
	      LDAPControl *cctrls[], int *msgidp);

       int ldap_sasl_bind_s(LDAP *ld, const char *dn, const char *mechanism,
	      struct berval *cred, LDAPControl *sctrls[],
	      LDAPControl *cctrls[], struct berval **servercredp);

       int ldap_parse_sasl_bind_result(LDAP *ld, LDAPMessage *res,
	      struct berval **servercredp, int freeit);

       int ldap_sasl_interactive_bind_s(LDAP *ld, const char *dn,
	      const char *mechs, struct berval *cred,
	      LDAPControl *sctrls[], LDAPControl *cctrls[],
	      unsigned flags, LDAP_SASL_INTERACT_PROC *interact,
	      void *defaults);

       int ldap_unbind(LDAP *ld);

       int ldap_unbind_s(LDAP *ld);

       These routines provide various interfaces to the LDAP bind operation.  After  an  associa-
       tion with an LDAP server is made using ldap_init(3), an LDAP bind operation should be per-
       formed before other operations are  attempted  over  the  connection.   An  LDAP  bind  is
       required  when  using  Version 2 of the LDAP protocol; it is optional for Version 3 but is
       usually needed due to security considerations.

       There are many types of bind calls, providing simple authentication,  Kerberos  version	4
       authentication, and general routines to do either one, as well as calls using SASL (Simple
       Authentication and Security Layer) that can negotiate  one  of  many  different	kinds  of
       authentication.	 Both  synchronous  and asynchronous versions of each variant of the bind
       call are provided.  All routines take ld  as  their  first  parameter,  as  returned  from

       Kerberos  version  4 has been superseded by Kerberos version 5, and the Kerberos version 4
       support is only provided for backward compatibility. The SASL interfaces  should  be  used
       for  new applications. SASL provides a general interface for using Kerberos versions 4 and
       5 and many other security systems.

       The simplest form of the bind call is ldap_simple_bind_s().  It takes the DN to bind as in
       who,  and  the userPassword associated with the entry in passwd.  It returns an LDAP error
       indication (see ldap_error(3)).	The ldap_simple_bind() call is asynchronous,  taking  the
       same parameters but only initiating the bind operation and returning the message id of the
       request it sent.  The result of the operation can be obtained  by  a  subsequent  call  to

       If  the	LDAP library and LDAP server being contacted have been compiled with the KERBEROS
       option defined, Kerberos version 4 authentication can be performed.  As	mentioned  above,
       these Kerberos routines are provided only for backward compatibility.

       These  routines	assume	the user already has obtained a ticket granting ticket.  The rou-
       tines take who, the DN of the entry to bind as.	The ldap_kerberos_bind_s()  routine  does
       both steps of the Kerberos binding process synchronously.  The ldap_kerberos_bind1_s() and
       ldap_kerberos_bind2_s() routines allow synchronous access to the individual steps, authen-
       ticating  to  the  LDAP server and X.500 DSA, respectively.  The ldap_kerberos_bind1() and
       ldap_kerberos_bind2() routines provide equivalent asynchronous access.

       The ldap_kerberos_bind_s() routine is used to perform both authentication steps when  con-
       tacting	an LDAP server that is a gateway to an X.500 DSA.  This kind of server configura-
       tion is only supported in the (very old) University of Michigan LDAP release.  The  OpenL-
       DAP  package  no longer provides this gateway server.  The standalone LDAP server provided
       in OpenLDAP may still be configured with Kerberos version 4 support, but it only  requires
       one authentication step, and will return an error if the second step is attempted.  There-
       fore, only the ldap_kerberos_bind1() routine or its synchronous	equivalent  may  be  used
       when contacting an OpenLDAP server.

       The  ldap_bind()  and ldap_bind_s() routines can be used when the authentication method to
       use needs to be selected at runtime.  They both take an extra method  parameter	selecting
       the  authentication  method  to	use.   It  should  be  set  to	one  of LDAP_AUTH_SIMPLE,
       LDAP_AUTH_KRBV41, or LDAP_AUTH_KRBV42, to select simple authentication, Kerberos authenti-
       cation  to  the	LDAP  server,  or Kerberos authentication to the X.500 DSA, respectively.
       ldap_bind() returns the message id of the request it initiates.	ldap_bind_s() returns  an
       LDAP error indication.

       Description still under construction...

       The ldap_unbind() call is used to unbind from the directory, terminate the current associ-
       ation, and free the resources contained in the ld structure.  Once it is called, the  con-
       nection	 to   the  LDAP  server  is  closed,  and  the	ld  structure  is  invalid.   The
       ldap_unbind_s() call is just another name for ldap_unbind(); both of these calls are  syn-
       chronous in nature.

       Asynchronous  routines  will return -1 in case of error, setting the ld_errno parameter of
       the ld  structure.   Synchronous  routines  return  whatever  ld_errno  is  set	to.   See
       ldap_error(3) for more information.

       ldap(3),   ldap_error(3),   ldap_open(3),   RFC	2222  (http://www.ietf.org),  Cyrus  SASL

       OpenLDAP is developed and maintained by The OpenLDAP  Project  (http://www.openldap.org/).
       OpenLDAP is derived from University of Michigan LDAP 3.3 Release.

OpenLDAP 2.1.X				   RELEASEDATE				     LDAP_BIND(3)
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