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/* mra.c - routines for dealing with extensible matching rule assertions */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2022 The OpenLDAP Foundation.
* 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 <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include "slap.h"
#ifdef LDAP_COMP_MATCH
#include "component.h"
#endif
void
mra_free(
Operation *op,
MatchingRuleAssertion *mra,
int freeit )
{
#ifdef LDAP_COMP_MATCH
/* free component assertion */
if ( mra->ma_rule->smr_usage & SLAP_MR_COMPONENT && mra->ma_cf ) {
component_free( mra->ma_cf );
}
#endif
/* op->o_tmpfree( mra->ma_value.bv_val, op->o_tmpmemctx ); */
ch_free( mra->ma_value.bv_val );
if ( mra->ma_desc && mra->ma_desc->ad_flags & SLAP_DESC_TEMPORARY )
op->o_tmpfree( mra->ma_desc, op->o_tmpmemctx );
if ( freeit ) op->o_tmpfree( (char *) mra, op->o_tmpmemctx );
}
int
get_mra(
Operation *op,
BerElement *ber,
Filter *f,
const char **text )
{
int rc;
ber_tag_t tag, rtag;
ber_len_t length;
struct berval type = BER_BVNULL;
struct berval value = BER_BVNULL;
struct berval rule_text = BER_BVNULL;
MatchingRuleAssertion ma = { 0 };
#ifdef LDAP_COMP_MATCH
AttributeAliasing* aa = NULL;
#endif
rtag = ber_scanf( ber, "{t" /*"}"*/, &tag );
if( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf\n" );
*text = "Error parsing matching rule assertion";
return SLAPD_DISCONNECT;
}
if ( tag == LDAP_FILTER_EXT_OID ) {
rtag = ber_scanf( ber, "m", &rule_text );
if ( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf for mr\n" );
*text = "Error parsing matching rule in matching rule assertion";
return SLAPD_DISCONNECT;
}
rtag = ber_scanf( ber, "t", &tag );
if( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf\n" );
*text = "Error parsing matching rule assertion";
return SLAPD_DISCONNECT;
}
}
if ( tag == LDAP_FILTER_EXT_TYPE ) {
rtag = ber_scanf( ber, "m", &type );
if ( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf for ad\n" );
*text = "Error parsing attribute description in matching rule assertion";
return SLAPD_DISCONNECT;
}
rtag = ber_scanf( ber, "t", &tag );
if( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf\n" );
*text = "Error parsing matching rule assertion";
return SLAPD_DISCONNECT;
}
}
if ( tag != LDAP_FILTER_EXT_VALUE ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf missing value\n" );
*text = "Missing value in matching rule assertion";
return SLAPD_DISCONNECT;
}
rtag = ber_scanf( ber, "m", &value );
if( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf\n" );
*text = "Error decoding value in matching rule assertion";
return SLAPD_DISCONNECT;
}
tag = ber_peek_tag( ber, &length );
if ( tag == LDAP_FILTER_EXT_DNATTRS ) {
rtag = ber_scanf( ber, /*"{"*/ "b}", &ma.ma_dnattrs );
} else {
rtag = ber_scanf( ber, /*"{"*/ "}" );
}
if( rtag == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, " get_mra ber_scanf\n" );
*text = "Error decoding dnattrs matching rule assertion";
return SLAPD_DISCONNECT;
}
if( type.bv_val != NULL ) {
rc = slap_bv2ad( &type, &ma.ma_desc, text );
if( rc != LDAP_SUCCESS ) {
f->f_choice |= SLAPD_FILTER_UNDEFINED;
rc = slap_bv2undef_ad( &type, &ma.ma_desc, text,
SLAP_AD_PROXIED|SLAP_AD_NOINSERT );
if( rc != LDAP_SUCCESS ) {
ma.ma_desc = slap_bv2tmp_ad( &type, op->o_tmpmemctx );
rc = LDAP_SUCCESS;
}
}
}
if( rule_text.bv_val != NULL ) {
ma.ma_rule = mr_bvfind( &rule_text );
if( ma.ma_rule == NULL ) {
*text = "matching rule not recognized";
return LDAP_INAPPROPRIATE_MATCHING;
}
}
if ( ma.ma_rule == NULL ) {
/*
* Need either type or rule ...
*/
if ( ma.ma_desc == NULL ) {
*text = "no matching rule or type";
return LDAP_INAPPROPRIATE_MATCHING;
}
if ( ma.ma_desc->ad_type->sat_equality != NULL &&
ma.ma_desc->ad_type->sat_equality->smr_usage & SLAP_MR_EXT )
{
/* no matching rule was provided, use the attribute's
equality rule if it supports extensible matching. */
ma.ma_rule = ma.ma_desc->ad_type->sat_equality;
} else {
*text = "no appropriate rule to use for type";
return LDAP_INAPPROPRIATE_MATCHING;
}
}
if ( ma.ma_desc != NULL ) {
if( !mr_usable_with_at( ma.ma_rule, ma.ma_desc->ad_type ) ) {
*text = "matching rule use with this attribute not appropriate";
return LDAP_INAPPROPRIATE_MATCHING;
}
}
/*
* Normalize per matching rule
*/
rc = asserted_value_validate_normalize( ma.ma_desc,
ma.ma_rule,
SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
&value, &ma.ma_value, text, op->o_tmpmemctx );
if( rc != LDAP_SUCCESS ) return rc;
#ifdef LDAP_COMP_MATCH
/* Check If this attribute is aliased */
if ( is_aliased_attribute && ma.ma_desc && ( aa = is_aliased_attribute ( ma.ma_desc ) ) ) {
rc = get_aliased_filter ( op, &ma, aa, text );
if ( rc != LDAP_SUCCESS ) return rc;
}
else if ( ma.ma_rule && ma.ma_rule->smr_usage & SLAP_MR_COMPONENT ) {
/* Matching Rule for Component Matching */
rc = get_comp_filter( op, &ma.ma_value, &ma.ma_cf, text );
if ( rc != LDAP_SUCCESS ) return rc;
}
#endif
length = sizeof(ma);
/* Append rule_text to end of struct */
if (rule_text.bv_val) length += rule_text.bv_len + 1;
f->f_mra = op->o_tmpalloc( length, op->o_tmpmemctx );
*f->f_mra = ma;
if (rule_text.bv_val) {
f->f_mra->ma_rule_text.bv_len = rule_text.bv_len;
f->f_mra->ma_rule_text.bv_val = (char *)(f->f_mra+1);
AC_MEMCPY(f->f_mra->ma_rule_text.bv_val, rule_text.bv_val,
rule_text.bv_len+1);
}
return LDAP_SUCCESS;
}
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