saslbind.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
*
* Copyright %G% Sun Microsystems, Inc.
* All Rights Reserved
*
*
* Comments:
*
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <string.h>
#include "lber.h"
#include "ldap.h"
#include "ldap-private.h"
#include "ldap-int.h"
#include "sec.h"
#include <strings.h>
BerElement * ldap_build_sasl_bind_req( LDAP *ld, char *dn, char *mechanism, struct berval *creds, LDAPControl ** serverctrls)
{
BerElement *ber = NULL;
int err;
/* Create a Bind Request for SASL authentication.
* It look like this :
* BindRequest := [APPLICATION 0] SEQUENCE {
* version INTEGER,
* name LDAPDN,
* authentication CHOICE {
* sasl [3] SEQUENCE {
* mechanism LDAPString,
* credential OCTET STRING OPTIONAL
* }
* }
* }
* all wrapped up in an LDAPMessage sequence.
*/
if (dn == NULL || *dn == '\0'){
ld->ld_errno = LDAP_PARAM_ERROR;
return (NULLBER);
}
if ( (ber = alloc_ber_with_options( ld )) == NULLBER ) {
return (NULLBER);
}
if ( ber_printf( ber, "{it{ist{s", ++ld->ld_msgid, LDAP_REQ_BIND, ld->ld_version, dn, LDAP_AUTH_SASL, mechanism) == -1){
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free(ber, 1);
return (NULLBER);
}
if (creds != NULL && creds->bv_val != NULL) {
if (ber_printf(ber, "o", creds->bv_val, creds->bv_len) == -1){
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free(ber, 1);
return (NULLBER);
}
}
if (ber_printf(ber, "}}") == -1){
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULLBER );
}
/* LDAPv3 */
/* Code controls if any */
if (serverctrls && serverctrls[0]) {
if (ldap_controls_code(ber, serverctrls) != LDAP_SUCCESS){
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULLBER );
}
} else if (ld->ld_srvctrls && ld->ld_srvctrls[0]) {
/* Otherwise, is there any global server ctrls ? */
if (ldap_controls_code(ber, ld->ld_srvctrls) != LDAP_SUCCESS){
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULLBER );
}
}
if ( ber_printf( ber, "}" ) == -1 ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULLBER );
}
return (ber);
}
/*
* ldap_sasl_bind - bind to the ldap server (and X.500).
* dn, mechanism, cred, serverctrls, and clientctrls are supplied.
* the message id of the request is returned in msgid
* Returns LDAP_SUCCESS or an error code.
*/
int ldap_sasl_bind(
LDAP *ld,
char *dn,
char *mechanism,
struct berval *cred,
LDAPControl **serverctrls,
LDAPControl **clientctrls,
int *msgidp)
{
int theErr = LDAP_SUCCESS;
int rv;
BerElement *ber = NULL;
Debug ( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 1288, "ldap_sasl_bind\n"), 0,0,0);
#ifdef _REENTRANT
LOCK_LDAP(ld);
#endif
if (strcasecmp(mechanism, LDAP_SASL_SIMPLE) == 0){
/* Simple bind */
if ( (ber = ldap_build_simple_bind_req(ld, dn, cred->bv_val, serverctrls)) == NULLBER){
ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (theErr);
}
}
if (strcasecmp(mechanism, LDAP_SASL_CRAM_MD5) == 0){
if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_CRAM_MD5, cred, serverctrls)) == NULLBER) {
ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (theErr);
}
}
if (strcasecmp(mechanism, LDAP_SASL_EXTERNAL) == 0){
if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_EXTERNAL, cred, serverctrls)) == NULLBER) {
ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (theErr);
}
}
if (strcasecmp(mechanism, LDAP_SASL_X511_PROTECTED) == 0){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_NOT_SUPPORTED);
/*
* if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_X511_PROTECTED, cred, serverctrls)) == NULLBER) {
* ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
*#ifdef _REENTRANT
* UNLOCK_LDAP(ld);
*#endif
* return (theErr);
* }
*/
}
if (strcasecmp(mechanism, LDAP_SASL_X511_STRONG) == 0){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_NOT_SUPPORTED);
/*
* if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_X511_PROTECTED, cred, serverctrls)) == NULLBER) {
* ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
*#ifdef _REENTRANT
* UNLOCK_LDAP(ld);
*#endif
* return (theErr);
* }
*/
}
if (strcasecmp(mechanism, LDAP_SASL_KERBEROS_V4) == 0){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_NOT_SUPPORTED);
/*
* if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_X511_PROTECTED, cred, serverctrls)) == NULLBER) {
* ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
*#ifdef _REENTRANT
* UNLOCK_LDAP(ld);
*#endif
* return (theErr);
* }
*/
}
if (strcasecmp(mechanism, LDAP_SASL_GSSAPI) == 0){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_NOT_SUPPORTED);
/*
* if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_X511_PROTECTED, cred, serverctrls)) == NULLBER) {
* ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
*#ifdef _REENTRANT
* UNLOCK_LDAP(ld);
*#endif
* return (theErr);
* }
*/
}
if (strcasecmp(mechanism, LDAP_SASL_SKEY) == 0){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_NOT_SUPPORTED);
/*
* if (( ber = ldap_build_sasl_bind_req(ld, dn, LDAP_SASL_X511_PROTECTED, cred, serverctrls)) == NULLBER) {
* ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &theErr);
*#ifdef _REENTRANT
* UNLOCK_LDAP(ld);
*#endif
* return (theErr);
* }
*/
}
if (ber == NULL){
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (LDAP_PARAM_ERROR);
}
#ifndef NO_CACHE
if ( ld->ld_cache != NULL ) {
ldap_flush_cache( ld );
}
#endif /* !NO_CACHE */
/* send the message */
rv = send_initial_request( ld, LDAP_REQ_BIND, dn, ber );
if (rv == -1){
rv = ld->ld_errno;
if (rv == LDAP_SUCCESS){
rv = LDAP_OTHER;
}
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return (rv);
}
*msgidp = rv;
#ifdef _REENTRANT
UNLOCK_LDAP(ld);
#endif
return ( LDAP_SUCCESS );
}
/*
* ldap_sasl_bind_s - bind to the ldap server (and X.500).
* dn, mechanism, cred, serverctrls, and clientctrls are supplied.
* the message id of the request is returned in msgid
* Returns LDAP_SUCCESS or an error code.
*/
int ldap_sasl_bind_s(
LDAP *ld,
char *dn,
char *mechanism,
struct berval *cred,
LDAPControl **serverctrls,
LDAPControl **clientctrls,
struct berval **servercredp)
{
int msgid;
int retcode;
LDAPMessage *res;
Debug ( LDAP_DEBUG_TRACE, catgets(slapdcat, 1, 1288, "ldap_sasl_bind\n"), 0,0,0);
if ((retcode = ldap_sasl_bind(ld, dn, mechanism, cred, serverctrls, clientctrls, &msgid)) != LDAP_SUCCESS)
return (retcode);
if (ldap_result(ld, msgid, 1, (struct timeval *)NULL, &res ) == -1)
return (ld->ld_errno );
return (ldap_parse_sasl_bind_result(ld, res, servercredp, 1));
}
int ldap_sasl_cram_md5_bind_s(
LDAP *ld,
char *dn,
struct berval *cred,
LDAPControl **serverctrls,
LDAPControl **clientctrls )
{
int res;
struct berval *challenge = NULL;
struct berval resp;
unsigned char digest[16];
char *theHDigest;
if (dn == NULL){
return (LDAP_PARAM_ERROR);
}
bzero(digest, sizeof (digest));
if ((res = ldap_sasl_bind_s(ld, dn, LDAP_SASL_CRAM_MD5, NULL, serverctrls, clientctrls, &challenge))
!= LDAP_SASL_BIND_INPROGRESS){
return (res);
}
if (challenge == NULL){
return (LDAP_PARAM_ERROR);
}
Debug (LDAP_DEBUG_TRACE, "SASL challenge: %s\n", challenge->bv_val, 0, 0);
hmac_md5((unsigned char *)challenge->bv_val, challenge->bv_len,
(unsigned char *)cred->bv_val, cred->bv_len, digest);
ber_bvfree(challenge);
challenge = NULL;
theHDigest = hexa_print(digest, 16);
if (theHDigest == NULL){
return (LDAP_NO_MEMORY);
}
resp.bv_len = (strlen(dn) + 32 + 1);
if ((resp.bv_val = (char *)malloc(resp.bv_len+1)) == NULL) {
return(LDAP_NO_MEMORY);
}
sprintf(resp.bv_val, "%s %s", dn, theHDigest);
free(theHDigest);
Debug (LDAP_DEBUG_TRACE, "SASL response: %s\n", resp.bv_val, 0, 0);
res = ldap_sasl_bind_s(ld, dn, LDAP_SASL_CRAM_MD5, &resp, serverctrls, clientctrls, &challenge);
free(resp.bv_val);
return (res);
}