openldap/servers/slapd/back-sql/compare.c

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
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* Copyright 1999-2004 The OpenLDAP Foundation.
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* Portions Copyright 1999 Dmitry Kovalev.
* 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 Dmitry Kovalev for inclusion
* by OpenLDAP Software.
*/
#include "portable.h"
#ifdef SLAPD_SQL
#include <stdio.h>
#include <sys/types.h>
#include "slap.h"
#include "proto-sql.h"
int
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backsql_compare( Operation *op, SlapReply *rs )
{
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backsql_info *bi = (backsql_info*)op->o_bd->be_private;
backsql_entryID user_id;
SQLHDBC dbh;
Entry *e = NULL, user_entry;
Attribute *a = NULL, *a_op = NULL;
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backsql_srch_info bsi;
int rc;
AttributeName anlist[2];
user_entry.e_name.bv_val = NULL;
user_entry.e_name.bv_len = 0;
user_entry.e_nname.bv_val = NULL;
user_entry.e_nname.bv_len = 0;
user_entry.e_attrs = NULL;
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Debug( LDAP_DEBUG_TRACE, "==>backsql_compare()\n", 0, 0, 0 );
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rs->sr_err = backsql_get_db_conn( op, &dbh );
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if (!dbh) {
Debug( LDAP_DEBUG_TRACE, "backsql_compare(): "
"could not get connection handle - exiting\n",
0, 0, 0 );
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rs->sr_text = ( rs->sr_err == LDAP_OTHER )
? "SQL-backend error" : NULL;
goto return_results;
}
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rc = backsql_dn2id( bi, &user_id, dbh, &op->o_req_ndn );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_compare(): "
"could not retrieve compare dn id - no such entry\n",
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0, 0, 0 );
rs->sr_err = LDAP_NO_SUCH_OBJECT;
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goto return_results;
}
Final run of changes to back-sql; IBM db2 support has been tested. Now related ITSes need be audited and possibly closed. Enhancements: - re-styled code for better readability - upgraded backend API to reflect recent changes - LDAP schema is checked when loading SQL/LDAP mapping - AttributeDescription/ObjectClass pointers used for more efficient mapping lookup - bervals used where string length is required often - atomized write operations by committing at the end of each operation and defaulting connection closure to rollback - added LDAP access control to write operations - fully implemented modrdn (with rdn attrs change, deleteoldrdn, access check, parent/children check and more) - added parent access control, children control to delete operation - added structuralObjectClass operational attribute check and value return on search - added hasSubordinate operational attribute on demand - search limits are appropriately enforced - function backsql_strcat() has been made more efficient - concat function has been made configurable by means of a pattern - added config switches: - fail_if_no_mapping write operations fail if there is no mapping - has_ldapinfo_dn_ru overrides autodetect - concat_pattern a string containing two '?' is used (note that "?||?" should be more portable than builtin function "CONCAT(?,?)") - strcast_func cast of string constants in "SELECT DISTINCT statements (needed by PostgreSQL) - upper_needs_cast cast the argument of upper when required (basically when building dn substring queries) Todo: - add security checks for SQL statements that can be injected (?) - re-test with previously supported RDBMs - replace dn_ru and so with normalized dn (no need for upper() and so in dn match) - implement a backsql_normalize() function to replace the upper() conversion routines - note that subtree deletion, subtree renaming and so could be easily implemented (rollback and consistency checks are available :) - implement "lastmod" and other operational stuff (ldap_entries table ?)
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anlist[0].an_name = op->oq_compare.rs_ava->aa_desc->ad_cname;
anlist[0].an_desc = op->oq_compare.rs_ava->aa_desc;
anlist[1].an_name.bv_val = NULL;
/*
* Try to get attr as dynamic operational
*/
if ( is_at_operational( op->oq_compare.rs_ava->aa_desc->ad_type ) ) {
AttributeName *an_old;
Entry *e_old;
user_entry.e_attrs = NULL;
user_entry.e_name = op->o_req_dn;
user_entry.e_nname = op->o_req_ndn;
an_old = rs->sr_attrs;
e_old = rs->sr_entry;
rs->sr_attrs = anlist;
rs->sr_entry = &user_entry;
rs->sr_err = backsql_operational( op, rs, 0, &a_op );
rs->sr_attrs = an_old;
rs->sr_entry = e_old;
if ( rs->sr_err != LDAP_SUCCESS ) {
goto return_results;
}
}
/*
* attr was dynamic operational
*/
if ( a_op != NULL ) {
user_entry.e_attrs = a_op;
e = &user_entry;
} else {
backsql_init_search( &bsi, &op->o_req_ndn, LDAP_SCOPE_BASE,
-1, -1, -1, NULL, dbh, op, anlist );
e = backsql_id2entry( &bsi, &user_entry, &user_id );
if ( e == NULL ) {
Debug( LDAP_DEBUG_TRACE, "backsql_compare(): "
"error in backsql_id2entry() "
"- compare failed\n", 0, 0, 0 );
rs->sr_err = LDAP_OTHER;
goto return_results;
}
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}
if ( ! access_allowed( op, e, op->oq_compare.rs_ava->aa_desc,
&op->oq_compare.rs_ava->aa_value,
ACL_COMPARE, NULL ) ) {
rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
goto return_results;
}
rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
for ( a = attrs_find( e->e_attrs, op->oq_compare.rs_ava->aa_desc );
a != NULL;
a = attrs_find( a->a_next, op->oq_compare.rs_ava->aa_desc ))
{
rs->sr_err = LDAP_COMPARE_FALSE;
if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
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a->a_nvals,
&op->oq_compare.rs_ava->aa_value,
op->o_tmpmemctx ) == 0 )
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{
rs->sr_err = LDAP_COMPARE_TRUE;
break;
}
}
return_results:;
send_ldap_result( op, rs );
if ( e != NULL ) {
if ( e->e_name.bv_val != NULL ) {
free( e->e_name.bv_val );
}
if ( e->e_nname.bv_val != NULL ) {
free( e->e_nname.bv_val );
}
if ( e->e_attrs != NULL ) {
attrs_free( e->e_attrs );
}
}
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Debug(LDAP_DEBUG_TRACE,"<==backsql_compare()\n",0,0,0);
switch ( rs->sr_err ) {
case LDAP_COMPARE_TRUE:
case LDAP_COMPARE_FALSE:
return 0;
default:
return 1;
}
}
#endif /* SLAPD_SQL */