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/* proxyOld.c - module for supporting obsolete (rev 05) proxyAuthz control */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2005-2021 The OpenLDAP Foundation.
* Portions Copyright 2005 by Howard Chu, Symas Corp.
* 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>.
*/
#include <portable.h>
#include <slap.h>
#include <lber.h>
/*
#include <lber_pvt.h>
#include <lutil.h>
*/
/* This code is based on draft-weltman-ldapv3-proxy-05. There are a lot
* of holes in that draft, it doesn't specify that the control is legal
* for Add operations, and it makes no mention of Extended operations.
* It also doesn't specify whether an empty LDAPDN is allowed in the
* control value.
*
* For usability purposes, we're copying the op / exop behavior from the
* newer -12 draft.
*/
#define LDAP_CONTROL_PROXY_AUTHZ05 "2.16.840.1.113730.3.4.12"
static char *proxyOld_extops[] = {
LDAP_EXOP_MODIFY_PASSWD,
LDAP_EXOP_X_WHO_AM_I,
NULL
};
static int
proxyOld_parse(
Operation *op,
SlapReply *rs,
LDAPControl *ctrl )
{
int rc;
BerElement *ber;
ber_tag_t tag;
struct berval dn = BER_BVNULL;
struct berval authzDN = BER_BVNULL;
/* We hijack the flag for the new control. Clearly only one or the
* other can be used at any given time.
*/
if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
rs->sr_text = "proxy authorization control specified multiple times";
return LDAP_PROTOCOL_ERROR;
}
op->o_proxy_authz = ctrl->ldctl_iscritical
? SLAP_CONTROL_CRITICAL
: SLAP_CONTROL_NONCRITICAL;
/* Parse the control value
* proxyAuthzControlValue ::= SEQUENCE {
* proxyDN LDAPDN
* }
*/
ber = ber_init( &ctrl->ldctl_value );
if ( ber == NULL ) {
rs->sr_text = "ber_init failed";
return LDAP_OTHER;
}
tag = ber_scanf( ber, "{m}", &dn );
if ( tag == LBER_ERROR ) {
rs->sr_text = "proxyOld control could not be decoded";
rc = LDAP_OTHER;
goto done;
}
if ( BER_BVISEMPTY( &dn )) {
Debug( LDAP_DEBUG_TRACE,
"proxyOld_parse: conn=%lu anonymous\n",
op->o_connid, 0, 0 );
authzDN.bv_val = ch_strdup("");
} else {
Debug( LDAP_DEBUG_ARGS,
"proxyOld_parse: conn %lu ctrl DN=\"%s\"\n",
op->o_connid, dn.bv_val, 0 );
rc = dnNormalize( 0, NULL, NULL, &dn, &authzDN, op->o_tmpmemctx );
if ( rc != LDAP_SUCCESS ) {
goto done;
}
rc = slap_sasl_authorized( op, &op->o_ndn, &authzDN );
if ( rc ) {
op->o_tmpfree( authzDN.bv_val, op->o_tmpmemctx );
rs->sr_text = "not authorized to assume identity";
/* new spec uses LDAP_PROXY_AUTHZ_FAILURE */
rc = LDAP_INSUFFICIENT_ACCESS;
goto done;
}
}
free( op->o_ndn.bv_val );
free( op->o_dn.bv_val );
op->o_ndn = authzDN;
ber_dupbv( &op->o_dn, &authzDN );
Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu PROXYOLD dn=\"%s\"\n",
op->o_connid, op->o_opid,
authzDN.bv_len ? authzDN.bv_val : "anonymous", 0, 0 );
rc = LDAP_SUCCESS;
done:
ber_free( ber, 1 );
return rc;
}
int init_module(int argc, char *argv[]) {
return register_supported_control( LDAP_CONTROL_PROXY_AUTHZ05,
SLAP_CTRL_GLOBAL|SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, proxyOld_extops,
proxyOld_parse, NULL );
}
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