openldap/servers/slapd/overlays/rwmdn.c

/* rwmdn.c - massages dns */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1999-2017 The OpenLDAP Foundation.
 * Portions Copyright 1999-2003 Howard Chu.
 * Portions Copyright 2000-2003 Pierangelo Masarati.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* ACKNOWLEDGEMENTS:
 * This work was initially developed by Howard Chu for inclusion
 * in OpenLDAP Software and subsequently enhanced by Pierangelo
 * Masarati.
 */


#include "portable.h"

#ifdef SLAPD_OVER_RWM

#include <stdio.h>

#include <ac/string.h>
#include <ac/socket.h>

#include "slap.h"
#include "rwm.h"

/* FIXME: after rewriting, we should also remap attributes ...  */

/*
 * massages "in" and normalizes it into "ndn"
 *
 * "ndn" may be untouched if no massaging occurred and its value was not null
 */
int
rwm_dn_massage_normalize(
	dncookie *dc,
	struct berval *in,
	struct berval *ndn )
{
	int		rc;
	struct berval	mdn = BER_BVNULL;
	
	/* massage and normalize a DN */
	rc = rwm_dn_massage( dc, in, &mdn );
	if ( rc != LDAP_SUCCESS ) {
		return rc;
	}

	if ( mdn.bv_val == in->bv_val && !BER_BVISNULL( ndn ) ) {
		return rc;
	}

	rc = dnNormalize( 0, NULL, NULL, &mdn, ndn, NULL );

	if ( mdn.bv_val != in->bv_val ) {
		ch_free( mdn.bv_val );
	}

	return rc;
}

/*
 * massages "in" and prettifies it into "pdn"
 *
 * "pdn" may be untouched if no massaging occurred and its value was not null
 */
int
rwm_dn_massage_pretty(
	dncookie *dc,
	struct berval *in,
	struct berval *pdn )
{
	int		rc;
	struct berval	mdn = BER_BVNULL;
	
	/* massage and pretty a DN */
	rc = rwm_dn_massage( dc, in, &mdn );
	if ( rc != LDAP_SUCCESS ) {
		return rc;
	}

	if ( mdn.bv_val == in->bv_val && !BER_BVISNULL( pdn ) ) {
		return rc;
	}

	rc = dnPretty( NULL, &mdn, pdn, NULL );

	if ( mdn.bv_val != in->bv_val ) {
		ch_free( mdn.bv_val );
	}

	return rc;
}

/*
 * massages "in" and prettifies and normalizes it into "pdn" and "ndn"
 *
 * "pdn" may be untouched if no massaging occurred and its value was not null;
 * "ndn" may be untouched if no massaging occurred and its value was not null;
 * if no massage occurred and "ndn" value was not null, it is filled
 * with the normalized value of "pdn", much like ndn = dnNormalize( pdn )
 */
int
rwm_dn_massage_pretty_normalize(
	dncookie *dc,
	struct berval *in,
	struct berval *pdn,
	struct berval *ndn )
{
	int		rc;
	struct berval	mdn = BER_BVNULL;
	
	/* massage, pretty and normalize a DN */
	rc = rwm_dn_massage( dc, in, &mdn );
	if ( rc != LDAP_SUCCESS ) {
		return rc;
	}

	if ( mdn.bv_val == in->bv_val && !BER_BVISNULL( pdn ) ) {
		if ( BER_BVISNULL( ndn ) ) {
			rc = dnNormalize( 0, NULL, NULL, &mdn, ndn, NULL );
		}
		return rc;
	}

	rc = dnPrettyNormal( NULL, &mdn, pdn, ndn, NULL );

	if ( mdn.bv_val != in->bv_val ) {
		ch_free( mdn.bv_val );
	}

	return rc;
}

/*
 * massages "in" into "dn"
 * 
 * "dn" may contain the value of "in" if no massage occurred
 */
int
rwm_dn_massage(
	dncookie *dc,
	struct berval *in,
	struct berval *dn
)
{
	int		rc = 0;
	struct berval	mdn;
	static char	*dmy = "";
	char *in_val;

	assert( dc != NULL );
	assert( in != NULL );
	assert( dn != NULL );

	/* protect from NULL berval */
	in_val = in->bv_val ? in->bv_val : dmy;

	rc = rewrite_session( dc->rwmap->rwm_rw, dc->ctx,
			in_val, dc->conn, &mdn.bv_val );
	switch ( rc ) {
	case REWRITE_REGEXEC_OK:
		if ( !BER_BVISNULL( &mdn ) && mdn.bv_val != in_val ) {
			mdn.bv_len = strlen( mdn.bv_val );
			*dn = mdn;
		} else {
			dn->bv_len = in->bv_len;
			dn->bv_val = in_val;
		}
		rc = LDAP_SUCCESS;

		Debug( LDAP_DEBUG_ARGS,
			"[rw] %s: \"%s\" -> \"%s\"\n",
			dc->ctx, in_val, dn->bv_val );
		break;
 		
 	case REWRITE_REGEXEC_UNWILLING:
		if ( dc->rs ) {
			dc->rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
			dc->rs->sr_text = "Operation not allowed";
		}
		rc = LDAP_UNWILLING_TO_PERFORM;
		break;
	       	
	case REWRITE_REGEXEC_ERR:
		if ( dc->rs ) {
			dc->rs->sr_err = LDAP_OTHER;
			dc->rs->sr_text = "Rewrite error";
		}
		rc = LDAP_OTHER;
		break;
	}

	if ( mdn.bv_val == dmy ) {
		BER_BVZERO( &mdn );
	}

	if ( dn->bv_val == dmy ) {
		BER_BVZERO( dn );
	}

	return rc;
}

#endif /* SLAPD_OVER_RWM */