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-rw-r--r--servers/slapd/overlays/constraint.c1249
1 files changed, 1249 insertions, 0 deletions
diff --git a/servers/slapd/overlays/constraint.c b/servers/slapd/overlays/constraint.c
new file mode 100644
index 0000000..1feff7a
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+++ b/servers/slapd/overlays/constraint.c
@@ -0,0 +1,1249 @@
+/* $OpenLDAP$ */
+/* constraint.c - Overlay to constrain attributes to certain values */
+/*
+ * Copyright 2003-2004 Hewlett-Packard Company
+ * Copyright 2007 Emmanuel Dreyfus
+ * 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>.
+ */
+/*
+ * Authors: Neil Dunbar <neil.dunbar@hp.com>
+ * Emmanuel Dreyfus <manu@netbsd.org>
+ */
+#include "portable.h"
+
+#ifdef SLAPD_OVER_CONSTRAINT
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+#include <ac/regex.h>
+
+#include "lutil.h"
+#include "slap.h"
+#include "slap-config.h"
+
+/*
+ * This overlay limits the values which can be placed into an
+ * attribute, over and above the limits placed by the schema.
+ *
+ * It traps only LDAP adds and modify commands (and only seeks to
+ * control the add and modify value mods of a modify)
+ */
+
+#define REGEX_STR "regex"
+#define NEG_REGEX_STR "negregex"
+#define URI_STR "uri"
+#define SET_STR "set"
+#define SIZE_STR "size"
+#define COUNT_STR "count"
+
+/*
+ * Linked list of attribute constraints which we should enforce.
+ * This is probably a sub optimal structure - some form of sorted
+ * array would be better if the number of attributes constrained is
+ * likely to be much bigger than 4 or 5. We stick with a list for
+ * the moment.
+ */
+
+typedef struct constraint {
+ struct constraint *ap_next;
+ AttributeDescription **ap;
+
+ LDAPURLDesc *restrict_lud;
+ struct berval restrict_ndn;
+ Filter *restrict_filter;
+ struct berval restrict_val;
+
+ int type;
+ regex_t *re;
+ LDAPURLDesc *lud;
+ int set;
+ size_t size;
+ size_t count;
+ AttributeDescription **attrs;
+ struct berval val; /* constraint value */
+ struct berval dn;
+ struct berval filter;
+} constraint;
+
+enum {
+ CONSTRAINT_ATTRIBUTE = 1,
+ CONSTRAINT_COUNT,
+ CONSTRAINT_SIZE,
+ CONSTRAINT_REGEX,
+ CONSTRAINT_NEG_REGEX,
+ CONSTRAINT_SET,
+ CONSTRAINT_URI,
+};
+
+static ConfigDriver constraint_cf_gen;
+
+static ConfigTable constraintcfg[] = {
+ { "constraint_attribute", "attribute[list]> (regex|negregex|uri|set|size|count) <value> [<restrict URI>]",
+ 4, 0, 0, ARG_MAGIC | CONSTRAINT_ATTRIBUTE, constraint_cf_gen,
+ "( OLcfgOvAt:13.1 NAME 'olcConstraintAttribute' "
+ "DESC 'constraint for list of attributes' "
+ "EQUALITY caseIgnoreMatch "
+ "SYNTAX OMsDirectoryString )", NULL, NULL },
+ { NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs constraintocs[] = {
+ { "( OLcfgOvOc:13.1 "
+ "NAME 'olcConstraintConfig' "
+ "DESC 'Constraint overlay configuration' "
+ "SUP olcOverlayConfig "
+ "MAY ( olcConstraintAttribute ) )",
+ Cft_Overlay, constraintcfg },
+ { NULL, 0, NULL }
+};
+
+static void
+constraint_free( constraint *cp, int freeme )
+{
+ if (cp->restrict_lud)
+ ldap_free_urldesc(cp->restrict_lud);
+ if (!BER_BVISNULL(&cp->restrict_ndn))
+ ch_free(cp->restrict_ndn.bv_val);
+ if (cp->restrict_filter != NULL && cp->restrict_filter != slap_filter_objectClass_pres)
+ filter_free(cp->restrict_filter);
+ if (!BER_BVISNULL(&cp->restrict_val))
+ ch_free(cp->restrict_val.bv_val);
+ if (cp->re) {
+ regfree(cp->re);
+ ch_free(cp->re);
+ }
+ if (!BER_BVISNULL(&cp->val))
+ ch_free(cp->val.bv_val);
+ if (cp->lud)
+ ldap_free_urldesc(cp->lud);
+ if (cp->attrs)
+ ch_free(cp->attrs);
+ if (cp->ap)
+ ch_free(cp->ap);
+ if (freeme)
+ ch_free(cp);
+}
+
+static int
+constraint_cf_gen( ConfigArgs *c )
+{
+ slap_overinst *on = (slap_overinst *)(c->bi);
+ constraint *cn = on->on_bi.bi_private, *cp;
+ struct berval bv;
+ int i, rc = 0;
+ constraint ap = { NULL };
+ const char *text = NULL;
+
+ switch ( c->op ) {
+ case SLAP_CONFIG_EMIT:
+ switch (c->type) {
+ case CONSTRAINT_ATTRIBUTE:
+ for (cp=cn; cp; cp=cp->ap_next) {
+ char *s;
+ char *tstr = NULL;
+ int quotes = 0, numeric = 0;
+ int j;
+ size_t val;
+ char val_buf[SLAP_TEXT_BUFLEN] = { '\0' };
+
+ bv.bv_len = STRLENOF(" ");
+ for (j = 0; cp->ap[j]; j++) {
+ bv.bv_len += cp->ap[j]->ad_cname.bv_len;
+ }
+
+ /* room for commas */
+ bv.bv_len += j - 1;
+
+ switch (cp->type) {
+ case CONSTRAINT_COUNT:
+ tstr = COUNT_STR;
+ val = cp->count;
+ numeric = 1;
+ break;
+ case CONSTRAINT_SIZE:
+ tstr = SIZE_STR;
+ val = cp->size;
+ numeric = 1;
+ break;
+ case CONSTRAINT_REGEX:
+ tstr = REGEX_STR;
+ quotes = 1;
+ break;
+ case CONSTRAINT_NEG_REGEX:
+ tstr = NEG_REGEX_STR;
+ quotes = 1;
+ break;
+ case CONSTRAINT_SET:
+ tstr = SET_STR;
+ quotes = 1;
+ break;
+ case CONSTRAINT_URI:
+ tstr = URI_STR;
+ quotes = 1;
+ break;
+ default:
+ abort();
+ }
+
+ bv.bv_len += strlen(tstr);
+ bv.bv_len += cp->val.bv_len + 2*quotes;
+
+ if (cp->restrict_lud != NULL) {
+ bv.bv_len += cp->restrict_val.bv_len + STRLENOF(" restrict=\"\"");
+ }
+
+ if (numeric) {
+ int len = snprintf(val_buf, sizeof(val_buf), "%zu", val);
+ if (len <= 0) {
+ /* error */
+ return -1;
+ }
+ bv.bv_len += len;
+ }
+
+ s = bv.bv_val = ch_malloc(bv.bv_len + 1);
+
+ s = lutil_strncopy( s, cp->ap[0]->ad_cname.bv_val, cp->ap[0]->ad_cname.bv_len );
+ for (j = 1; cp->ap[j]; j++) {
+ *s++ = ',';
+ s = lutil_strncopy( s, cp->ap[j]->ad_cname.bv_val, cp->ap[j]->ad_cname.bv_len );
+ }
+ *s++ = ' ';
+ s = lutil_strcopy( s, tstr );
+ *s++ = ' ';
+ if (numeric) {
+ s = lutil_strcopy( s, val_buf );
+ } else {
+ if ( quotes ) *s++ = '"';
+ s = lutil_strncopy( s, cp->val.bv_val, cp->val.bv_len );
+ if ( quotes ) *s++ = '"';
+ }
+ if (cp->restrict_lud != NULL) {
+ s = lutil_strcopy( s, " restrict=\"" );
+ s = lutil_strncopy( s, cp->restrict_val.bv_val, cp->restrict_val.bv_len );
+ *s++ = '"';
+ }
+ *s = '\0';
+
+ rc = value_add_one( &c->rvalue_vals, &bv );
+ if (rc == LDAP_SUCCESS)
+ rc = value_add_one( &c->rvalue_nvals, &bv );
+ ch_free(bv.bv_val);
+ if (rc) return rc;
+ }
+ break;
+ default:
+ abort();
+ break;
+ }
+ break;
+ case LDAP_MOD_DELETE:
+ switch (c->type) {
+ case CONSTRAINT_ATTRIBUTE:
+ if (!cn) break; /* nothing to do */
+
+ if (c->valx < 0) {
+ /* zap all constraints */
+ while (cn) {
+ cp = cn->ap_next;
+ constraint_free( cn, 1 );
+ cn = cp;
+ }
+
+ on->on_bi.bi_private = NULL;
+ } else {
+ constraint **cpp;
+
+ /* zap constraint numbered 'valx' */
+ for(i=0, cp = cn, cpp = &cn;
+ (cp) && (i<c->valx);
+ i++, cpp = &cp->ap_next, cp = *cpp);
+
+ if (cp) {
+ /* zap cp, and join cpp to cp->ap_next */
+ *cpp = cp->ap_next;
+ constraint_free( cp, 1 );
+ }
+ on->on_bi.bi_private = cn;
+ }
+ break;
+
+ default:
+ abort();
+ break;
+ }
+ break;
+ case SLAP_CONFIG_ADD:
+ case LDAP_MOD_ADD:
+ switch (c->type) {
+ case CONSTRAINT_ATTRIBUTE: {
+ int j;
+ char **attrs = ldap_str2charray( c->argv[1], "," );
+
+ for ( j = 0; attrs[j]; j++)
+ /* just count */ ;
+ ap.ap = ch_calloc( sizeof(AttributeDescription*), j + 1 );
+ for ( j = 0; attrs[j]; j++) {
+ if ( slap_str2ad( attrs[j], &ap.ap[j], &text ) ) {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s <%s>: %s\n", c->argv[0], attrs[j], text );
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+ }
+
+ int is_regex = strcasecmp( c->argv[2], REGEX_STR ) == 0;
+ int is_neg_regex = strcasecmp( c->argv[2], NEG_REGEX_STR ) == 0;
+ if ( is_regex || is_neg_regex ) {
+ int err;
+
+ ap.type = is_regex ? CONSTRAINT_REGEX : CONSTRAINT_NEG_REGEX;
+ ap.re = ch_malloc( sizeof(regex_t) );
+ if ((err = regcomp( ap.re,
+ c->argv[3], REG_EXTENDED )) != 0) {
+ char errmsg[1024];
+
+ regerror( err, ap.re, errmsg, sizeof(errmsg) );
+ ch_free(ap.re);
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s %s: Illegal regular expression \"%s\": Error %s",
+ c->argv[0], c->argv[1], c->argv[3], errmsg);
+ ap.re = NULL;
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+ ber_str2bv( c->argv[3], 0, 1, &ap.val );
+ } else if ( strcasecmp( c->argv[2], SIZE_STR ) == 0 ) {
+ size_t size;
+ char *endptr;
+
+ ap.type = CONSTRAINT_SIZE;
+ ap.size = strtoull(c->argv[3], &endptr, 10);
+ if ( *endptr )
+ rc = ARG_BAD_CONF;
+ } else if ( strcasecmp( c->argv[2], COUNT_STR ) == 0 ) {
+ size_t count;
+ char *endptr;
+
+ ap.type = CONSTRAINT_COUNT;
+ ap.count = strtoull(c->argv[3], &endptr, 10);
+ if ( *endptr )
+ rc = ARG_BAD_CONF;
+ } else if ( strcasecmp( c->argv[2], URI_STR ) == 0 ) {
+ int err;
+
+ ap.type = CONSTRAINT_URI;
+ err = ldap_url_parse(c->argv[3], &ap.lud);
+ if ( err != LDAP_URL_SUCCESS ) {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s %s: Invalid URI \"%s\"",
+ c->argv[0], c->argv[1], c->argv[3]);
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+
+ if (ap.lud->lud_host != NULL) {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s %s: unsupported hostname in URI \"%s\"",
+ c->argv[0], c->argv[1], c->argv[3]);
+ ldap_free_urldesc(ap.lud);
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+
+ for ( i=0; ap.lud->lud_attrs[i]; i++);
+ /* FIXME: This is worthless without at least one attr */
+ if ( i ) {
+ ap.attrs = ch_malloc( (i+1)*sizeof(AttributeDescription *));
+ for ( i=0; ap.lud->lud_attrs[i]; i++) {
+ ap.attrs[i] = NULL;
+ if ( slap_str2ad( ap.lud->lud_attrs[i], &ap.attrs[i], &text ) ) {
+ ch_free( ap.attrs );
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s <%s>: %s\n", c->argv[0], ap.lud->lud_attrs[i], text );
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+ }
+ ap.attrs[i] = NULL;
+ }
+
+ if (ap.lud->lud_dn == NULL) {
+ ap.lud->lud_dn = ch_strdup("");
+ } else {
+ struct berval dn, ndn;
+
+ ber_str2bv( ap.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: URI %s DN normalization failed",
+ c->argv[0], c->argv[1], c->argv[3] );
+ Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
+ "%s: %s\n", c->log, c->cr_msg );
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+ ldap_memfree( ap.lud->lud_dn );
+ ap.lud->lud_dn = ndn.bv_val;
+ }
+
+ if (ap.lud->lud_filter == NULL) {
+ ap.lud->lud_filter = ch_strdup("objectClass=*");
+ } else if ( ap.lud->lud_filter[0] == '(' ) {
+ ber_len_t len = strlen( ap.lud->lud_filter );
+ if ( ap.lud->lud_filter[len - 1] != ')' ) {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s %s: invalid URI filter: %s",
+ c->argv[0], c->argv[1], ap.lud->lud_filter );
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+ AC_MEMCPY( &ap.lud->lud_filter[0], &ap.lud->lud_filter[1], len - 2 );
+ ap.lud->lud_filter[len - 2] = '\0';
+ }
+
+ ber_str2bv( c->argv[3], 0, 1, &ap.val );
+
+ } else if ( strcasecmp( c->argv[2], SET_STR ) == 0 ) {
+ ap.set = 1;
+ ber_str2bv( c->argv[3], 0, 1, &ap.val );
+ ap.type = CONSTRAINT_SET;
+
+ } else {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%s %s: Unknown constraint type: %s",
+ c->argv[0], c->argv[1], c->argv[2] );
+ rc = ARG_BAD_CONF;
+ goto done;
+ }
+
+ if ( c->argc > 4 ) {
+ int argidx;
+
+ for ( argidx = 4; argidx < c->argc; argidx++ ) {
+ if ( strncasecmp( c->argv[argidx], "restrict=", STRLENOF("restrict=") ) == 0 ) {
+ int err;
+ char *arg = c->argv[argidx] + STRLENOF("restrict=");
+
+ err = ldap_url_parse(arg, &ap.restrict_lud);
+ if ( err != LDAP_URL_SUCCESS ) {
+ snprintf( c->cr_msg, sizeof( c->cr_msg ),
+ "%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 ),
+ "%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 ),
+ "%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 **app, *a2 = ch_calloc( sizeof(constraint), 1 );
+
+ 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;
+
+ for ( app = &on->on_bi.bi_private; *app; app = &(*app)->ap_next )
+ /* Get to the end */ ;
+
+ a2->ap_next = *app;
+ *app = 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_NEG_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_flags = SLAPO_BFLAG_SINGLE;
+ 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) */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 23:30:55 +0000