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1232 lines
30 KiB
C
1232 lines
30 KiB
C
/* $OpenLDAP$ */
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/* constraint.c - Overlay to constrain attributes to certain values */
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/*
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* Copyright 2003-2004 Hewlett-Packard Company
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* Copyright 2007 Emmanuel Dreyfus
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/*
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* Authors: Neil Dunbar <neil.dunbar@hp.com>
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* Emmanuel Dreyfus <manu@netbsd.org>
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*/
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#include "portable.h"
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#ifdef SLAPD_OVER_CONSTRAINT
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#include <ac/regex.h>
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#include "lutil.h"
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#include "slap.h"
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#include "config.h"
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/*
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* This overlay limits the values which can be placed into an
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* attribute, over and above the limits placed by the schema.
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*
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* It traps only LDAP adds and modify commands (and only seeks to
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* control the add and modify value mods of a modify)
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*/
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#define REGEX_STR "regex"
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#define URI_STR "uri"
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#define SET_STR "set"
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#define SIZE_STR "size"
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#define COUNT_STR "count"
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/*
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* Linked list of attribute constraints which we should enforce.
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* This is probably a sub optimal structure - some form of sorted
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* array would be better if the number of attributes constrained is
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* likely to be much bigger than 4 or 5. We stick with a list for
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* the moment.
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*/
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typedef struct constraint {
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struct constraint *ap_next;
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AttributeDescription **ap;
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LDAPURLDesc *restrict_lud;
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struct berval restrict_ndn;
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Filter *restrict_filter;
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struct berval restrict_val;
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int type;
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regex_t *re;
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LDAPURLDesc *lud;
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int set;
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size_t size;
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size_t count;
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AttributeDescription **attrs;
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struct berval val; /* constraint value */
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struct berval dn;
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struct berval filter;
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} constraint;
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enum {
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CONSTRAINT_ATTRIBUTE = 1,
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CONSTRAINT_COUNT,
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CONSTRAINT_SIZE,
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CONSTRAINT_REGEX,
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CONSTRAINT_SET,
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CONSTRAINT_URI,
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};
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static ConfigDriver constraint_cf_gen;
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static ConfigTable constraintcfg[] = {
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{ "constraint_attribute", "attribute[list]> (regex|uri|set|size|count) <value> [<restrict URI>]",
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4, 0, 0, ARG_MAGIC | CONSTRAINT_ATTRIBUTE, constraint_cf_gen,
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"( OLcfgOvAt:13.1 NAME 'olcConstraintAttribute' "
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"DESC 'constraint for list of attributes' "
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"EQUALITY caseIgnoreMatch "
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"SYNTAX OMsDirectoryString )", NULL, NULL },
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{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
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};
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static ConfigOCs constraintocs[] = {
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{ "( OLcfgOvOc:13.1 "
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"NAME 'olcConstraintConfig' "
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"DESC 'Constraint overlay configuration' "
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"SUP olcOverlayConfig "
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"MAY ( olcConstraintAttribute ) )",
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Cft_Overlay, constraintcfg },
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{ NULL, 0, NULL }
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};
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static void
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constraint_free( constraint *cp, int freeme )
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{
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if (cp->restrict_lud)
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ldap_free_urldesc(cp->restrict_lud);
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if (!BER_BVISNULL(&cp->restrict_ndn))
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ch_free(cp->restrict_ndn.bv_val);
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if (cp->restrict_filter != NULL && cp->restrict_filter != slap_filter_objectClass_pres)
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filter_free(cp->restrict_filter);
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if (!BER_BVISNULL(&cp->restrict_val))
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ch_free(cp->restrict_val.bv_val);
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if (cp->re) {
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regfree(cp->re);
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ch_free(cp->re);
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}
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if (!BER_BVISNULL(&cp->val))
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ch_free(cp->val.bv_val);
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if (cp->lud)
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ldap_free_urldesc(cp->lud);
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if (cp->attrs)
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ch_free(cp->attrs);
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if (cp->ap)
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ch_free(cp->ap);
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if (freeme)
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ch_free(cp);
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}
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static int
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constraint_cf_gen( ConfigArgs *c )
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{
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slap_overinst *on = (slap_overinst *)(c->bi);
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constraint *cn = on->on_bi.bi_private, *cp;
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struct berval bv;
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int i, rc = 0;
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constraint ap = { NULL };
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const char *text = NULL;
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switch ( c->op ) {
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case SLAP_CONFIG_EMIT:
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switch (c->type) {
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case CONSTRAINT_ATTRIBUTE:
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for (cp=cn; cp; cp=cp->ap_next) {
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char *s;
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char *tstr = NULL;
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int quotes = 0, numeric = 0;
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int j;
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size_t val;
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char val_buf[SLAP_TEXT_BUFLEN] = { '\0' };
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bv.bv_len = STRLENOF(" ");
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for (j = 0; cp->ap[j]; j++) {
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bv.bv_len += cp->ap[j]->ad_cname.bv_len;
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}
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/* room for commas */
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bv.bv_len += j - 1;
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switch (cp->type) {
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case CONSTRAINT_COUNT:
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tstr = COUNT_STR;
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val = cp->count;
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numeric = 1;
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break;
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case CONSTRAINT_SIZE:
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tstr = SIZE_STR;
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val = cp->size;
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numeric = 1;
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break;
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case CONSTRAINT_REGEX:
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tstr = REGEX_STR;
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quotes = 1;
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break;
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case CONSTRAINT_SET:
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tstr = SET_STR;
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quotes = 1;
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break;
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case CONSTRAINT_URI:
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tstr = URI_STR;
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quotes = 1;
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break;
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default:
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abort();
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}
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bv.bv_len += strlen(tstr);
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bv.bv_len += cp->val.bv_len + 2*quotes;
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if (cp->restrict_lud != NULL) {
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bv.bv_len += cp->restrict_val.bv_len + STRLENOF(" restrict=\"\"");
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}
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if (numeric) {
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int len = snprintf(val_buf, sizeof(val_buf), "%zu", val);
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if (len <= 0) {
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/* error */
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return -1;
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}
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bv.bv_len += len;
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}
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s = bv.bv_val = ch_malloc(bv.bv_len + 1);
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s = lutil_strncopy( s, cp->ap[0]->ad_cname.bv_val, cp->ap[0]->ad_cname.bv_len );
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for (j = 1; cp->ap[j]; j++) {
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*s++ = ',';
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s = lutil_strncopy( s, cp->ap[j]->ad_cname.bv_val, cp->ap[j]->ad_cname.bv_len );
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}
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*s++ = ' ';
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s = lutil_strcopy( s, tstr );
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*s++ = ' ';
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if (numeric) {
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s = lutil_strcopy( s, val_buf );
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} else {
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if ( quotes ) *s++ = '"';
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s = lutil_strncopy( s, cp->val.bv_val, cp->val.bv_len );
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if ( quotes ) *s++ = '"';
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}
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if (cp->restrict_lud != NULL) {
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s = lutil_strcopy( s, " restrict=\"" );
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s = lutil_strncopy( s, cp->restrict_val.bv_val, cp->restrict_val.bv_len );
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*s++ = '"';
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}
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*s = '\0';
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rc = value_add_one( &c->rvalue_vals, &bv );
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if (rc == LDAP_SUCCESS)
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rc = value_add_one( &c->rvalue_nvals, &bv );
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ch_free(bv.bv_val);
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if (rc) return rc;
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}
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break;
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default:
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abort();
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break;
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}
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break;
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case LDAP_MOD_DELETE:
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switch (c->type) {
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case CONSTRAINT_ATTRIBUTE:
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if (!cn) break; /* nothing to do */
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if (c->valx < 0) {
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/* zap all constraints */
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while (cn) {
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cp = cn->ap_next;
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constraint_free( cn, 1 );
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cn = cp;
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}
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on->on_bi.bi_private = NULL;
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} else {
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constraint **cpp;
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/* zap constraint numbered 'valx' */
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for(i=0, cp = cn, cpp = &cn;
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(cp) && (i<c->valx);
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i++, cpp = &cp->ap_next, cp = *cpp);
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if (cp) {
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/* zap cp, and join cpp to cp->ap_next */
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*cpp = cp->ap_next;
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constraint_free( cp, 1 );
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}
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on->on_bi.bi_private = cn;
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}
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break;
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default:
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abort();
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break;
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}
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break;
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case SLAP_CONFIG_ADD:
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case LDAP_MOD_ADD:
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switch (c->type) {
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case CONSTRAINT_ATTRIBUTE: {
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int j;
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char **attrs = ldap_str2charray( c->argv[1], "," );
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for ( j = 0; attrs[j]; j++)
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/* just count */ ;
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ap.ap = ch_calloc( sizeof(AttributeDescription*), j + 1 );
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for ( j = 0; attrs[j]; j++) {
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if ( slap_str2ad( attrs[j], &ap.ap[j], &text ) ) {
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s <%s>: %s\n", c->argv[0], attrs[j], text );
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rc = ARG_BAD_CONF;
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goto done;
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}
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}
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if ( strcasecmp( c->argv[2], REGEX_STR ) == 0) {
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int err;
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ap.type = CONSTRAINT_REGEX;
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ap.re = ch_malloc( sizeof(regex_t) );
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if ((err = regcomp( ap.re,
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c->argv[3], REG_EXTENDED )) != 0) {
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char errmsg[1024];
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regerror( err, ap.re, errmsg, sizeof(errmsg) );
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ch_free(ap.re);
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: Illegal regular expression \"%s\": Error %s",
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c->argv[0], c->argv[1], c->argv[3], errmsg);
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ap.re = NULL;
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rc = ARG_BAD_CONF;
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goto done;
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}
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ber_str2bv( c->argv[3], 0, 1, &ap.val );
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} else if ( strcasecmp( c->argv[2], SIZE_STR ) == 0 ) {
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size_t size;
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char *endptr;
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ap.type = CONSTRAINT_SIZE;
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ap.size = strtoull(c->argv[3], &endptr, 10);
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if ( *endptr )
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rc = ARG_BAD_CONF;
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} else if ( strcasecmp( c->argv[2], COUNT_STR ) == 0 ) {
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size_t count;
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char *endptr;
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ap.type = CONSTRAINT_COUNT;
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ap.count = strtoull(c->argv[3], &endptr, 10);
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if ( *endptr )
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rc = ARG_BAD_CONF;
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} else if ( strcasecmp( c->argv[2], URI_STR ) == 0 ) {
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int err;
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ap.type = CONSTRAINT_URI;
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err = ldap_url_parse(c->argv[3], &ap.lud);
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if ( err != LDAP_URL_SUCCESS ) {
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: Invalid URI \"%s\"",
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c->argv[0], c->argv[1], c->argv[3]);
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rc = ARG_BAD_CONF;
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goto done;
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}
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if (ap.lud->lud_host != NULL) {
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: unsupported hostname in URI \"%s\"",
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c->argv[0], c->argv[1], c->argv[3]);
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ldap_free_urldesc(ap.lud);
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rc = ARG_BAD_CONF;
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goto done;
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}
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for ( i=0; ap.lud->lud_attrs[i]; i++);
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/* FIXME: This is worthless without at least one attr */
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if ( i ) {
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ap.attrs = ch_malloc( (i+1)*sizeof(AttributeDescription *));
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for ( i=0; ap.lud->lud_attrs[i]; i++) {
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ap.attrs[i] = NULL;
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if ( slap_str2ad( ap.lud->lud_attrs[i], &ap.attrs[i], &text ) ) {
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ch_free( ap.attrs );
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s <%s>: %s\n", c->argv[0], ap.lud->lud_attrs[i], text );
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rc = ARG_BAD_CONF;
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goto done;
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}
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}
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ap.attrs[i] = NULL;
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}
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if (ap.lud->lud_dn == NULL) {
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ap.lud->lud_dn = ch_strdup("");
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} else {
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struct berval dn, ndn;
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ber_str2bv( ap.lud->lud_dn, 0, 0, &dn );
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if (dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ) ) {
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/* cleanup */
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: URI %s DN normalization failed",
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c->argv[0], c->argv[1], c->argv[3] );
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Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
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"%s: %s\n", c->log, c->cr_msg );
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rc = ARG_BAD_CONF;
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goto done;
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}
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ldap_memfree( ap.lud->lud_dn );
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ap.lud->lud_dn = ndn.bv_val;
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}
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if (ap.lud->lud_filter == NULL) {
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ap.lud->lud_filter = ch_strdup("objectClass=*");
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} else if ( ap.lud->lud_filter[0] == '(' ) {
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ber_len_t len = strlen( ap.lud->lud_filter );
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if ( ap.lud->lud_filter[len - 1] != ')' ) {
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: invalid URI filter: %s",
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c->argv[0], c->argv[1], ap.lud->lud_filter );
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rc = ARG_BAD_CONF;
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goto done;
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}
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AC_MEMCPY( &ap.lud->lud_filter[0], &ap.lud->lud_filter[1], len - 2 );
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ap.lud->lud_filter[len - 2] = '\0';
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}
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|
|
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ber_str2bv( c->argv[3], 0, 1, &ap.val );
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|
|
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} else if ( strcasecmp( c->argv[2], SET_STR ) == 0 ) {
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ap.set = 1;
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ber_str2bv( c->argv[3], 0, 1, &ap.val );
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ap.type = CONSTRAINT_SET;
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|
|
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} else {
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snprintf( c->cr_msg, sizeof( c->cr_msg ),
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"%s %s: Unknown constraint type: %s",
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c->argv[0], c->argv[1], c->argv[2] );
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rc = ARG_BAD_CONF;
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goto done;
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}
|
|
|
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if ( c->argc > 4 ) {
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int argidx;
|
|
|
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for ( argidx = 4; argidx < c->argc; argidx++ ) {
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if ( strncasecmp( c->argv[argidx], "restrict=", STRLENOF("restrict=") ) == 0 ) {
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int err;
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char *arg = c->argv[argidx] + STRLENOF("restrict=");
|
|
|
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err = ldap_url_parse(arg, &ap.restrict_lud);
|
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if ( err != LDAP_URL_SUCCESS ) {
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
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|
"%s %s: Invalid restrict URI \"%s\"",
|
|
c->argv[0], c->argv[1], arg);
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
|
|
if (ap.restrict_lud->lud_host != NULL) {
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
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|
"%s %s: unsupported hostname in restrict URI \"%s\"",
|
|
c->argv[0], c->argv[1], arg);
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
|
|
if ( ap.restrict_lud->lud_attrs != NULL ) {
|
|
if ( ap.restrict_lud->lud_attrs[0] != NULL ) {
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
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|
"%s %s: attrs not allowed in restrict URI %s\n",
|
|
c->argv[0], c->argv[1], arg);
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
ldap_memvfree((void *)ap.restrict_lud->lud_attrs);
|
|
ap.restrict_lud->lud_attrs = NULL;
|
|
}
|
|
|
|
if (ap.restrict_lud->lud_dn != NULL) {
|
|
if (ap.restrict_lud->lud_dn[0] == '\0') {
|
|
ldap_memfree(ap.restrict_lud->lud_dn);
|
|
ap.restrict_lud->lud_dn = NULL;
|
|
|
|
} else {
|
|
struct berval dn, ndn;
|
|
int j;
|
|
|
|
ber_str2bv(ap.restrict_lud->lud_dn, 0, 0, &dn);
|
|
if (dnNormalize(0, NULL, NULL, &dn, &ndn, NULL)) {
|
|
/* cleanup */
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
|
|
"%s %s: restrict URI %s DN normalization failed",
|
|
c->argv[0], c->argv[1], arg );
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
|
|
assert(c->be != NULL);
|
|
if (c->be->be_nsuffix == NULL) {
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
|
|
"%s %s: restrict URI requires suffix",
|
|
c->argv[0], c->argv[1] );
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
|
|
for ( j = 0; !BER_BVISNULL(&c->be->be_nsuffix[j]); j++) {
|
|
if (dnIsSuffix(&ndn, &c->be->be_nsuffix[j])) break;
|
|
}
|
|
|
|
if (BER_BVISNULL(&c->be->be_nsuffix[j])) {
|
|
/* error */
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
|
|
"%s %s: restrict URI DN %s not within database naming context(s)",
|
|
c->argv[0], c->argv[1], dn.bv_val );
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
|
|
ap.restrict_ndn = ndn;
|
|
}
|
|
}
|
|
|
|
if (ap.restrict_lud->lud_filter != NULL) {
|
|
ap.restrict_filter = str2filter(ap.restrict_lud->lud_filter);
|
|
if (ap.restrict_filter == NULL) {
|
|
/* error */
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
|
|
"%s %s: restrict URI filter %s invalid",
|
|
c->argv[0], c->argv[1], ap.restrict_lud->lud_filter );
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
ber_str2bv(c->argv[argidx] + STRLENOF("restrict="), 0, 1, &ap.restrict_val);
|
|
|
|
} else {
|
|
/* cleanup */
|
|
snprintf( c->cr_msg, sizeof( c->cr_msg ),
|
|
"%s %s: unrecognized arg #%d (%s)",
|
|
c->argv[0], c->argv[1], argidx, c->argv[argidx] );
|
|
rc = ARG_BAD_CONF;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
|
|
done:;
|
|
if ( rc == LDAP_SUCCESS ) {
|
|
constraint *a2 = ch_calloc( sizeof(constraint), 1 );
|
|
a2->ap_next = on->on_bi.bi_private;
|
|
a2->ap = ap.ap;
|
|
a2->type = ap.type;
|
|
a2->re = ap.re;
|
|
a2->val = ap.val;
|
|
a2->lud = ap.lud;
|
|
a2->set = ap.set;
|
|
a2->size = ap.size;
|
|
a2->count = ap.count;
|
|
if ( a2->lud ) {
|
|
ber_str2bv(a2->lud->lud_dn, 0, 0, &a2->dn);
|
|
ber_str2bv(a2->lud->lud_filter, 0, 0, &a2->filter);
|
|
}
|
|
a2->attrs = ap.attrs;
|
|
a2->restrict_lud = ap.restrict_lud;
|
|
a2->restrict_ndn = ap.restrict_ndn;
|
|
a2->restrict_filter = ap.restrict_filter;
|
|
a2->restrict_val = ap.restrict_val;
|
|
on->on_bi.bi_private = a2;
|
|
|
|
} else {
|
|
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
|
|
"%s: %s\n", c->log, c->cr_msg );
|
|
constraint_free( &ap, 0 );
|
|
}
|
|
|
|
ldap_memvfree((void**)attrs);
|
|
} break;
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
constraint_uri_cb( Operation *op, SlapReply *rs )
|
|
{
|
|
if(rs->sr_type == REP_SEARCH) {
|
|
int *foundp = op->o_callback->sc_private;
|
|
|
|
*foundp = 1;
|
|
|
|
Debug(LDAP_DEBUG_TRACE, "==> constraint_uri_cb <%s>\n",
|
|
rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN" );
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
constraint_violation( constraint *c, struct berval *bv, Operation *op )
|
|
{
|
|
if ((!c) || (!bv)) return LDAP_SUCCESS;
|
|
|
|
switch (c->type) {
|
|
case CONSTRAINT_SIZE:
|
|
if (bv->bv_len > c->size)
|
|
return LDAP_CONSTRAINT_VIOLATION; /* size violation */
|
|
break;
|
|
case CONSTRAINT_REGEX:
|
|
if (regexec(c->re, bv->bv_val, 0, NULL, 0) == REG_NOMATCH)
|
|
return LDAP_CONSTRAINT_VIOLATION; /* regular expression violation */
|
|
break;
|
|
case CONSTRAINT_URI: {
|
|
Operation nop = *op;
|
|
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
|
|
slap_callback cb = { 0 };
|
|
int i;
|
|
int found = 0;
|
|
int rc;
|
|
size_t len;
|
|
struct berval filterstr;
|
|
char *ptr;
|
|
|
|
cb.sc_response = constraint_uri_cb;
|
|
cb.sc_private = &found;
|
|
|
|
nop.o_protocol = LDAP_VERSION3;
|
|
nop.o_tag = LDAP_REQ_SEARCH;
|
|
nop.o_time = slap_get_time();
|
|
if (c->lud->lud_dn) {
|
|
struct berval dn;
|
|
|
|
ber_str2bv(c->lud->lud_dn, 0, 0, &dn);
|
|
nop.o_req_dn = dn;
|
|
nop.o_req_ndn = dn;
|
|
nop.o_bd = select_backend(&nop.o_req_ndn, 1 );
|
|
if (!nop.o_bd) {
|
|
return LDAP_NO_SUCH_OBJECT; /* unexpected error */
|
|
}
|
|
if (!nop.o_bd->be_search) {
|
|
return LDAP_OTHER; /* unexpected error */
|
|
}
|
|
} else {
|
|
nop.o_req_dn = nop.o_bd->be_nsuffix[0];
|
|
nop.o_req_ndn = nop.o_bd->be_nsuffix[0];
|
|
nop.o_bd = on->on_info->oi_origdb;
|
|
}
|
|
nop.o_do_not_cache = 1;
|
|
nop.o_callback = &cb;
|
|
|
|
nop.ors_scope = c->lud->lud_scope;
|
|
nop.ors_deref = LDAP_DEREF_NEVER;
|
|
nop.ors_slimit = SLAP_NO_LIMIT;
|
|
nop.ors_tlimit = SLAP_NO_LIMIT;
|
|
nop.ors_limit = NULL;
|
|
|
|
nop.ors_attrsonly = 0;
|
|
nop.ors_attrs = slap_anlist_no_attrs;
|
|
|
|
len = STRLENOF("(&(") +
|
|
c->filter.bv_len +
|
|
STRLENOF(")(|");
|
|
|
|
for (i = 0; c->attrs[i]; i++) {
|
|
len += STRLENOF("(") +
|
|
c->attrs[i]->ad_cname.bv_len +
|
|
STRLENOF("=") +
|
|
bv->bv_len +
|
|
STRLENOF(")");
|
|
}
|
|
|
|
len += STRLENOF("))");
|
|
filterstr.bv_len = len;
|
|
filterstr.bv_val = op->o_tmpalloc(len + 1, op->o_tmpmemctx);
|
|
|
|
ptr = filterstr.bv_val +
|
|
snprintf(filterstr.bv_val, len, "(&(%s)(|", c->lud->lud_filter);
|
|
for (i = 0; c->attrs[i]; i++) {
|
|
*ptr++ = '(';
|
|
ptr = lutil_strcopy( ptr, c->attrs[i]->ad_cname.bv_val );
|
|
*ptr++ = '=';
|
|
ptr = lutil_strcopy( ptr, bv->bv_val );
|
|
*ptr++ = ')';
|
|
}
|
|
*ptr++ = ')';
|
|
*ptr++ = ')';
|
|
*ptr++ = '\0';
|
|
|
|
nop.ors_filterstr = filterstr;
|
|
nop.ors_filter = str2filter_x(&nop, filterstr.bv_val);
|
|
if ( nop.ors_filter == NULL ) {
|
|
Debug( LDAP_DEBUG_ANY,
|
|
"%s constraint_violation uri filter=\"%s\" invalid\n",
|
|
op->o_log_prefix, filterstr.bv_val );
|
|
rc = LDAP_OTHER;
|
|
|
|
} else {
|
|
SlapReply nrs = { REP_RESULT };
|
|
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"==> constraint_violation uri filter = %s\n",
|
|
filterstr.bv_val );
|
|
|
|
rc = nop.o_bd->be_search( &nop, &nrs );
|
|
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"==> constraint_violation uri rc = %d, found = %d\n",
|
|
rc, found );
|
|
}
|
|
op->o_tmpfree(filterstr.bv_val, op->o_tmpmemctx);
|
|
|
|
if ((rc != LDAP_SUCCESS) && (rc != LDAP_NO_SUCH_OBJECT)) {
|
|
return rc; /* unexpected error */
|
|
}
|
|
|
|
if (!found)
|
|
return LDAP_CONSTRAINT_VIOLATION; /* constraint violation */
|
|
break;
|
|
}
|
|
}
|
|
|
|
return LDAP_SUCCESS;
|
|
}
|
|
|
|
static char *
|
|
print_message( struct berval *errtext, AttributeDescription *a )
|
|
{
|
|
char *ret;
|
|
int sz;
|
|
|
|
sz = errtext->bv_len + sizeof(" on ") + a->ad_cname.bv_len;
|
|
ret = ch_malloc(sz);
|
|
snprintf( ret, sz, "%s on %s", errtext->bv_val, a->ad_cname.bv_val );
|
|
return ret;
|
|
}
|
|
|
|
static unsigned
|
|
constraint_count_attr(Entry *e, AttributeDescription *ad)
|
|
{
|
|
struct Attribute *a;
|
|
|
|
if ((a = attr_find(e->e_attrs, ad)) != NULL)
|
|
return a->a_numvals;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
constraint_check_restrict( Operation *op, constraint *c, Entry *e )
|
|
{
|
|
assert( c->restrict_lud != NULL );
|
|
|
|
if ( c->restrict_lud->lud_dn != NULL ) {
|
|
int diff = e->e_nname.bv_len - c->restrict_ndn.bv_len;
|
|
|
|
if ( diff < 0 ) {
|
|
return 0;
|
|
}
|
|
|
|
if ( c->restrict_lud->lud_scope == LDAP_SCOPE_BASE ) {
|
|
return bvmatch( &e->e_nname, &c->restrict_ndn );
|
|
}
|
|
|
|
if ( !dnIsSuffix( &e->e_nname, &c->restrict_ndn ) ) {
|
|
return 0;
|
|
}
|
|
|
|
if ( c->restrict_lud->lud_scope != LDAP_SCOPE_SUBTREE ) {
|
|
struct berval pdn;
|
|
|
|
if ( diff == 0 ) {
|
|
return 0;
|
|
}
|
|
|
|
dnParent( &e->e_nname, &pdn );
|
|
|
|
if ( c->restrict_lud->lud_scope == LDAP_SCOPE_ONELEVEL
|
|
&& pdn.bv_len != c->restrict_ndn.bv_len )
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( c->restrict_filter != NULL ) {
|
|
int rc;
|
|
struct berval save_dn = op->o_dn, save_ndn = op->o_ndn;
|
|
|
|
op->o_dn = op->o_bd->be_rootdn;
|
|
op->o_ndn = op->o_bd->be_rootndn;
|
|
rc = test_filter( op, e, c->restrict_filter );
|
|
op->o_dn = save_dn;
|
|
op->o_ndn = save_ndn;
|
|
|
|
if ( rc != LDAP_COMPARE_TRUE ) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
constraint_add( Operation *op, SlapReply *rs )
|
|
{
|
|
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
|
|
Attribute *a;
|
|
constraint *c = on->on_bi.bi_private, *cp;
|
|
BerVarray b = NULL;
|
|
int i;
|
|
struct berval rsv = BER_BVC("add breaks constraint");
|
|
int rc = 0;
|
|
char *msg = NULL;
|
|
|
|
if (get_relax(op) || SLAPD_SYNC_IS_SYNCCONN( op->o_connid )) {
|
|
return SLAP_CB_CONTINUE;
|
|
}
|
|
|
|
if ((a = op->ora_e->e_attrs) == NULL) {
|
|
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
|
|
send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
|
|
"constraint_add: no attrs");
|
|
return(rs->sr_err);
|
|
}
|
|
|
|
for(; a; a = a->a_next ) {
|
|
/* we don't constrain operational attributes */
|
|
if (is_at_operational(a->a_desc->ad_type)) continue;
|
|
|
|
for(cp = c; cp; cp = cp->ap_next) {
|
|
int j;
|
|
for (j = 0; cp->ap[j]; j++) {
|
|
if (cp->ap[j] == a->a_desc) break;
|
|
}
|
|
if (cp->ap[j] == NULL) continue;
|
|
if ((b = a->a_vals) == NULL) continue;
|
|
|
|
if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, op->ora_e) == 0) {
|
|
continue;
|
|
}
|
|
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"==> constraint_add, "
|
|
"a->a_numvals = %u, cp->count = %lu\n",
|
|
a->a_numvals, (unsigned long) cp->count );
|
|
|
|
switch (cp->type) {
|
|
case CONSTRAINT_COUNT:
|
|
if (a->a_numvals > cp->count)
|
|
rc = LDAP_CONSTRAINT_VIOLATION;
|
|
break;
|
|
case CONSTRAINT_SET:
|
|
if (acl_match_set(&cp->val, op, op->ora_e, NULL) == 0)
|
|
rc = LDAP_CONSTRAINT_VIOLATION;
|
|
break;
|
|
default:
|
|
for ( i = 0; b[i].bv_val; i++ ) {
|
|
rc = constraint_violation( cp, &b[i], op );
|
|
if ( rc ) {
|
|
goto add_violation;
|
|
}
|
|
}
|
|
}
|
|
if ( rc )
|
|
goto add_violation;
|
|
|
|
}
|
|
}
|
|
|
|
/* Default is to just fall through to the normal processing */
|
|
return SLAP_CB_CONTINUE;
|
|
|
|
add_violation:
|
|
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
|
|
if (rc == LDAP_CONSTRAINT_VIOLATION ) {
|
|
msg = print_message( &rsv, a->a_desc );
|
|
}
|
|
send_ldap_error(op, rs, rc, msg );
|
|
ch_free(msg);
|
|
return (rs->sr_err);
|
|
}
|
|
|
|
|
|
static int
|
|
constraint_check_count_violation( Modifications *m, Entry *target_entry, constraint *cp )
|
|
{
|
|
BerVarray b = NULL;
|
|
unsigned ce = 0;
|
|
unsigned ca;
|
|
int j;
|
|
|
|
for ( j = 0; cp->ap[j]; j++ ) {
|
|
/* Get this attribute count */
|
|
if ( target_entry )
|
|
ce = constraint_count_attr( target_entry, cp->ap[j] );
|
|
|
|
for( ; m; m = m->sml_next ) {
|
|
if ( cp->ap[j] == m->sml_desc ) {
|
|
ca = m->sml_numvals;
|
|
switch ( m->sml_op ) {
|
|
case LDAP_MOD_DELETE:
|
|
case SLAP_MOD_SOFTDEL:
|
|
if ( !ca || ca > ce ) {
|
|
ce = 0;
|
|
} else {
|
|
/* No need to check for values' validity. Invalid values
|
|
* cause the whole transaction to die anyway. */
|
|
ce -= ca;
|
|
}
|
|
break;
|
|
|
|
case LDAP_MOD_ADD:
|
|
case SLAP_MOD_SOFTADD:
|
|
ce += ca;
|
|
break;
|
|
|
|
case LDAP_MOD_REPLACE:
|
|
ce = ca;
|
|
break;
|
|
|
|
#if 0
|
|
/* TODO */
|
|
case handle SLAP_MOD_ADD_IF_NOT_PRESENT:
|
|
#endif
|
|
|
|
default:
|
|
/* impossible! assert? */
|
|
return 1;
|
|
}
|
|
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"==> constraint_check_count_violation ce = %u, "
|
|
"ca = %u, cp->count = %lu\n",
|
|
ce, ca, (unsigned long) cp->count);
|
|
}
|
|
}
|
|
}
|
|
|
|
return ( ce > cp->count );
|
|
}
|
|
|
|
static int
|
|
constraint_update( Operation *op, SlapReply *rs )
|
|
{
|
|
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
|
|
Backend *be = op->o_bd;
|
|
constraint *c = on->on_bi.bi_private, *cp;
|
|
Entry *target_entry = NULL, *target_entry_copy = NULL;
|
|
Modifications *modlist, *m;
|
|
BerVarray b = NULL;
|
|
int i;
|
|
struct berval rsv = BER_BVC("modify breaks constraint");
|
|
int rc;
|
|
char *msg = NULL;
|
|
int is_v;
|
|
|
|
if (get_relax(op) || SLAPD_SYNC_IS_SYNCCONN( op->o_connid )) {
|
|
return SLAP_CB_CONTINUE;
|
|
}
|
|
|
|
switch ( op->o_tag ) {
|
|
case LDAP_REQ_MODIFY:
|
|
modlist = op->orm_modlist;
|
|
break;
|
|
|
|
case LDAP_REQ_MODRDN:
|
|
modlist = op->orr_modlist;
|
|
break;
|
|
|
|
default:
|
|
/* impossible! assert? */
|
|
return LDAP_OTHER;
|
|
}
|
|
|
|
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, "constraint_update()\n" );
|
|
if ((m = modlist) == NULL) {
|
|
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
|
|
send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
|
|
"constraint_update() got null modlist");
|
|
return(rs->sr_err);
|
|
}
|
|
|
|
op->o_bd = on->on_info->oi_origdb;
|
|
rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &target_entry );
|
|
op->o_bd = be;
|
|
|
|
/* let the backend send the error */
|
|
if ( target_entry == NULL )
|
|
return SLAP_CB_CONTINUE;
|
|
|
|
/* Do we need to count attributes? */
|
|
for(cp = c; cp; cp = cp->ap_next) {
|
|
if (cp->type == CONSTRAINT_COUNT) {
|
|
if (cp->restrict_lud && constraint_check_restrict(op, cp, target_entry) == 0) {
|
|
continue;
|
|
}
|
|
|
|
is_v = constraint_check_count_violation(m, target_entry, cp);
|
|
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"==> constraint_update is_v: %d\n", is_v );
|
|
|
|
if (is_v) {
|
|
rc = LDAP_CONSTRAINT_VIOLATION;
|
|
goto mod_violation;
|
|
}
|
|
}
|
|
}
|
|
|
|
rc = LDAP_CONSTRAINT_VIOLATION;
|
|
for(;m; m = m->sml_next) {
|
|
unsigned ce = 0;
|
|
|
|
if (is_at_operational( m->sml_desc->ad_type )) continue;
|
|
|
|
if ((( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_ADD) &&
|
|
(( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_REPLACE) &&
|
|
(( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_DELETE))
|
|
continue;
|
|
/* we only care about ADD and REPLACE modifications */
|
|
/* and DELETE are used to track attribute count */
|
|
if ((( b = m->sml_values ) == NULL ) || (b[0].bv_val == NULL))
|
|
continue;
|
|
|
|
for(cp = c; cp; cp = cp->ap_next) {
|
|
int j;
|
|
for (j = 0; cp->ap[j]; j++) {
|
|
if (cp->ap[j] == m->sml_desc) {
|
|
break;
|
|
}
|
|
}
|
|
if (cp->ap[j] == NULL) continue;
|
|
|
|
if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, target_entry) == 0) {
|
|
continue;
|
|
}
|
|
|
|
/* DELETE are to be ignored beyond this point */
|
|
if (( m->sml_op & LDAP_MOD_OP ) == LDAP_MOD_DELETE)
|
|
continue;
|
|
|
|
for ( i = 0; b[i].bv_val; i++ ) {
|
|
rc = constraint_violation( cp, &b[i], op );
|
|
if ( rc ) {
|
|
goto mod_violation;
|
|
}
|
|
}
|
|
|
|
if (cp->type == CONSTRAINT_SET && target_entry) {
|
|
if (target_entry_copy == NULL) {
|
|
Modifications *ml;
|
|
|
|
target_entry_copy = entry_dup(target_entry);
|
|
|
|
/* if rename, set the new entry's name
|
|
* (in normalized form only) */
|
|
if ( op->o_tag == LDAP_REQ_MODRDN ) {
|
|
struct berval pdn, ndn = BER_BVNULL;
|
|
|
|
if ( op->orr_nnewSup ) {
|
|
pdn = *op->orr_nnewSup;
|
|
|
|
} else {
|
|
dnParent( &target_entry_copy->e_nname, &pdn );
|
|
}
|
|
|
|
build_new_dn( &ndn, &pdn, &op->orr_nnewrdn, NULL );
|
|
|
|
ber_memfree( target_entry_copy->e_nname.bv_val );
|
|
target_entry_copy->e_nname = ndn;
|
|
ber_bvreplace( &target_entry_copy->e_name, &ndn );
|
|
}
|
|
|
|
/* apply modifications, in an attempt
|
|
* to estimate what the entry would
|
|
* look like in case all modifications
|
|
* pass */
|
|
for ( ml = modlist; ml; ml = ml->sml_next ) {
|
|
Modification *mod = &ml->sml_mod;
|
|
const char *text;
|
|
char textbuf[SLAP_TEXT_BUFLEN];
|
|
size_t textlen = sizeof(textbuf);
|
|
int err;
|
|
|
|
switch ( mod->sm_op ) {
|
|
case LDAP_MOD_ADD:
|
|
err = modify_add_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
break;
|
|
|
|
case LDAP_MOD_DELETE:
|
|
err = modify_delete_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
break;
|
|
|
|
case LDAP_MOD_REPLACE:
|
|
err = modify_replace_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
break;
|
|
|
|
case LDAP_MOD_INCREMENT:
|
|
err = modify_increment_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
break;
|
|
|
|
case SLAP_MOD_SOFTADD:
|
|
mod->sm_op = LDAP_MOD_ADD;
|
|
err = modify_add_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
mod->sm_op = SLAP_MOD_SOFTADD;
|
|
if ( err == LDAP_TYPE_OR_VALUE_EXISTS ) {
|
|
err = LDAP_SUCCESS;
|
|
}
|
|
break;
|
|
|
|
case SLAP_MOD_SOFTDEL:
|
|
mod->sm_op = LDAP_MOD_ADD;
|
|
err = modify_delete_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
mod->sm_op = SLAP_MOD_SOFTDEL;
|
|
if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
|
|
err = LDAP_SUCCESS;
|
|
}
|
|
break;
|
|
|
|
case SLAP_MOD_ADD_IF_NOT_PRESENT:
|
|
if ( attr_find( target_entry_copy->e_attrs, mod->sm_desc ) ) {
|
|
err = LDAP_SUCCESS;
|
|
break;
|
|
}
|
|
mod->sm_op = LDAP_MOD_ADD;
|
|
err = modify_add_values( target_entry_copy,
|
|
mod, get_permissiveModify(op),
|
|
&text, textbuf, textlen );
|
|
mod->sm_op = SLAP_MOD_ADD_IF_NOT_PRESENT;
|
|
break;
|
|
|
|
default:
|
|
err = LDAP_OTHER;
|
|
break;
|
|
}
|
|
|
|
if ( err != LDAP_SUCCESS ) {
|
|
rc = err;
|
|
goto mod_violation;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( acl_match_set(&cp->val, op, target_entry_copy, NULL) == 0) {
|
|
rc = LDAP_CONSTRAINT_VIOLATION;
|
|
goto mod_violation;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (target_entry) {
|
|
op->o_bd = on->on_info->oi_origdb;
|
|
be_entry_release_r(op, target_entry);
|
|
op->o_bd = be;
|
|
}
|
|
|
|
if (target_entry_copy) {
|
|
entry_free(target_entry_copy);
|
|
}
|
|
|
|
return SLAP_CB_CONTINUE;
|
|
|
|
mod_violation:
|
|
/* violation */
|
|
if (target_entry) {
|
|
op->o_bd = on->on_info->oi_origdb;
|
|
be_entry_release_r(op, target_entry);
|
|
op->o_bd = be;
|
|
}
|
|
|
|
if (target_entry_copy) {
|
|
entry_free(target_entry_copy);
|
|
}
|
|
|
|
op->o_bd->bd_info = (BackendInfo *)(on->on_info);
|
|
if ( rc == LDAP_CONSTRAINT_VIOLATION ) {
|
|
msg = print_message( &rsv, m->sml_desc );
|
|
}
|
|
send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, msg );
|
|
ch_free(msg);
|
|
return (rs->sr_err);
|
|
}
|
|
|
|
static int
|
|
constraint_destroy(
|
|
BackendDB *be,
|
|
ConfigReply *cr )
|
|
{
|
|
slap_overinst *on = (slap_overinst *) be->bd_info;
|
|
constraint *ap, *a2;
|
|
|
|
for ( ap = on->on_bi.bi_private; ap; ap = a2 ) {
|
|
a2 = ap->ap_next;
|
|
constraint_free( ap, 1 );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static slap_overinst constraint_ovl;
|
|
|
|
#if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
|
|
static
|
|
#endif
|
|
int
|
|
constraint_initialize( void ) {
|
|
int rc;
|
|
|
|
constraint_ovl.on_bi.bi_type = "constraint";
|
|
constraint_ovl.on_bi.bi_db_destroy = constraint_destroy;
|
|
constraint_ovl.on_bi.bi_op_add = constraint_add;
|
|
constraint_ovl.on_bi.bi_op_modify = constraint_update;
|
|
constraint_ovl.on_bi.bi_op_modrdn = constraint_update;
|
|
|
|
constraint_ovl.on_bi.bi_private = NULL;
|
|
|
|
constraint_ovl.on_bi.bi_cf_ocs = constraintocs;
|
|
rc = config_register_schema( constraintcfg, constraintocs );
|
|
if (rc) return rc;
|
|
|
|
return overlay_register( &constraint_ovl );
|
|
}
|
|
|
|
#if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
|
|
int init_module(int argc, char *argv[]) {
|
|
return constraint_initialize();
|
|
}
|
|
#endif
|
|
|
|
#endif /* defined(SLAPD_OVER_CONSTRAINT) */
|
|
|