s4:dsdb/acl_read: enable acl checking on search by default (bug #8620)
[metze/samba/wip.git] / source4 / dsdb / samdb / ldb_modules / acl.c
index 69ff2aae9426333d3df258924bcb6589a4c17517..853fa20902e0cfd3f3ada6db091d9927b3802ae2 100644 (file)
@@ -39,7 +39,6 @@
 #include "librpc/gen_ndr/ndr_security.h"
 #include "param/param.h"
 #include "dsdb/samdb/ldb_modules/util.h"
-#include "dsdb/samdb/ldb_modules/schema.h"
 #include "lib/util/tsort.h"
 #include "system/kerberos.h"
 #include "auth/kerberos/kerberos.h"
@@ -50,14 +49,21 @@ struct extended_access_check_attribute {
 };
 
 struct acl_private {
-       bool acl_perform;
+       bool acl_search;
        const char **password_attrs;
+       void *cached_schema_ptr;
+       uint64_t cached_schema_metadata_usn;
+       uint64_t cached_schema_loaded_usn;
+       const char **confidential_attrs;
 };
 
 struct acl_context {
        struct ldb_module *module;
        struct ldb_request *req;
        bool am_system;
+       bool am_administrator;
+       bool modify_search;
+       bool constructed_attrs;
        bool allowedAttributes;
        bool allowedAttributesEffective;
        bool allowedChildClasses;
@@ -89,14 +95,13 @@ static int acl_module_init(struct ldb_module *module)
                return ldb_operr(ldb);
        }
 
-       data = talloc(module, struct acl_private);
+       data = talloc_zero(module, struct acl_private);
        if (data == NULL) {
                return ldb_oom(ldb);
        }
 
-       data->password_attrs = NULL;
-       data->acl_perform = lpcfg_parm_bool(ldb_get_opaque(ldb, "loadparm"),
-                                        NULL, "acl", "perform", false);
+       data->acl_search = lpcfg_parm_bool(ldb_get_opaque(ldb, "loadparm"),
+                                       NULL, "acl", "search", true);
        ldb_module_set_private(module, data);
 
        mem_ctx = talloc_new(module);
@@ -107,7 +112,9 @@ static int acl_module_init(struct ldb_module *module)
        ret = dsdb_module_search_dn(module, mem_ctx, &res,
                                    ldb_dn_new(mem_ctx, ldb, "@KLUDGEACL"),
                                    attrs,
-                                   DSDB_FLAG_NEXT_MODULE, NULL);
+                                   DSDB_FLAG_NEXT_MODULE |
+                                   DSDB_FLAG_AS_SYSTEM,
+                                   NULL);
        if (ret != LDB_SUCCESS) {
                goto done;
        }
@@ -287,6 +294,52 @@ static int acl_childClasses(struct ldb_module *module,
        return LDB_SUCCESS;
 }
 
+static int acl_check_access_on_class(struct ldb_module *module,
+                                    const struct dsdb_schema *schema,
+                                    TALLOC_CTX *mem_ctx,
+                                    struct security_descriptor *sd,
+                                    struct security_token *token,
+                                    struct dom_sid *rp_sid,
+                                    uint32_t access_mask,
+                                    const char *class_name)
+{
+       int ret;
+       NTSTATUS status;
+       uint32_t access_granted;
+       struct object_tree *root = NULL;
+       struct object_tree *new_node = NULL;
+       const struct GUID *guid;
+
+       if (class_name != NULL) {
+               guid = class_schemaid_guid_by_lDAPDisplayName(schema, class_name);
+               if (!guid) {
+                       DEBUG(10, ("acl_search: cannot find class %s\n",
+                                  class_name));
+                       goto fail;
+               }
+               if (!insert_in_object_tree(mem_ctx,
+                                          guid, access_mask,
+                                          &root, &new_node)) {
+                       DEBUG(10, ("acl_search: cannot add to object tree guid\n"));
+                       goto fail;
+               }
+       }
+
+       status = sec_access_check_ds(sd, token,
+                                    access_mask,
+                                    &access_granted,
+                                    root,
+                                    rp_sid);
+       if (!NT_STATUS_IS_OK(status)) {
+               ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
+       } else {
+               ret = LDB_SUCCESS;
+       }
+       return ret;
+fail:
+       return ldb_operr(ldb_module_get_ctx(module));
+}
+
 static int acl_childClassesEffective(struct ldb_module *module,
                                     const struct dsdb_schema *schema,
                                     struct ldb_message *sd_msg,
@@ -339,6 +392,7 @@ static int acl_childClassesEffective(struct ldb_module *module,
                                                        schema,
                                                        msg,
                                                        sd,
+                                                       acl_user_token(module),
                                                        sid,
                                                        SEC_ADS_CREATE_CHILD,
                                                        sclass->possibleInferiors[j]);
@@ -436,7 +490,7 @@ static int acl_sDRightsEffective(struct ldb_module *module,
 static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
                                  struct ldb_context *ldb,
                                  const char *spn_value,
-                                 int userAccountControl,
+                                 uint32_t userAccountControl,
                                  const char *samAccountName,
                                  const char *dnsHostName,
                                  const char *netbios_name,
@@ -449,8 +503,6 @@ static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
        char *instanceName;
        char *serviceType;
        char *serviceName;
-       const char *realm;
-       const char *guid_str;
        const char *forest_name = samdb_forest_name(ldb, mem_ctx);
        const char *base_domain = samdb_default_domain_name(ldb, mem_ctx);
        struct loadparm_context *lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
@@ -458,6 +510,12 @@ static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
        bool is_dc = (userAccountControl & UF_SERVER_TRUST_ACCOUNT) ||
                (userAccountControl & UF_PARTIAL_SECRETS_ACCOUNT);
 
+       if (strcasecmp_m(spn_value, samAccountName) == 0) {
+               /* MacOS X sets this value, and setting an SPN of your
+                * own samAccountName is both pointless and safe */
+               return LDB_SUCCESS;
+       }
+
        kerr = smb_krb5_init_context_basic(mem_ctx,
                                           lp_ctx,
                                           &krb_ctx);
@@ -472,12 +530,12 @@ static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
                return LDB_ERR_CONSTRAINT_VIOLATION;
        }
 
+       if (principal->name.name_string.len < 2) {
+               goto fail;
+       }
+
        instanceName = principal->name.name_string.val[1];
        serviceType = principal->name.name_string.val[0];
-       realm = krb5_principal_get_realm(krb_ctx, principal);
-       guid_str = talloc_asprintf(mem_ctx,"%s._msdcs.%s",
-                                  ntds_guid,
-                                  forest_name);
        if (principal->name.name_string.len == 3) {
                serviceName = principal->name.name_string.val[2];
        } else {
@@ -507,17 +565,21 @@ static int acl_validate_spn_value(TALLOC_CTX *mem_ctx,
        }
        /* instanceName can be samAccountName without $ or dnsHostName
         * or "ntds_guid._msdcs.forest_domain for DC objects */
-       if (strncasecmp(instanceName, samAccountName, strlen(samAccountName - 1)) == 0) {
+       if (strlen(instanceName) == (strlen(samAccountName) - 1)
+           && strncasecmp(instanceName, samAccountName, strlen(samAccountName) - 1) == 0) {
                goto success;
-       } else if (strcasecmp(instanceName, dnsHostName) == 0) {
+       } else if (dnsHostName != NULL && strcasecmp(instanceName, dnsHostName) == 0) {
                goto success;
        } else if (is_dc) {
+               const char *guid_str;
+               guid_str = talloc_asprintf(mem_ctx,"%s._msdcs.%s",
+                                          ntds_guid,
+                                          forest_name);
                if (strcasecmp(instanceName, guid_str) == 0) {
                        goto success;
                }
-       } else {
-               goto fail;
        }
+
 fail:
        krb5_free_principal(krb_ctx, principal);
        krb5_free_context(krb_ctx);
@@ -545,12 +607,12 @@ static int acl_check_spn(TALLOC_CTX *mem_ctx,
        struct ldb_result *netbios_res;
        struct ldb_message_element *el;
        struct ldb_dn *partitions_dn = samdb_partitions_dn(ldb, tmp_ctx);
-       int userAccountControl;
+       uint32_t userAccountControl;
        const char *samAccountName;
        const char *dnsHostName;
        const char *netbios_name;
-       const struct GUID *ntds = samdb_ntds_objectGUID(ldb);
-       const char *ntds_guid = GUID_string(tmp_ctx, ntds);
+       struct GUID ntds;
+       char *ntds_guid = NULL;
 
        static const char *acl_attrs[] = {
                "samAccountName",
@@ -562,6 +624,7 @@ static int acl_check_spn(TALLOC_CTX *mem_ctx,
                "nETBIOSName",
                NULL
        };
+
        /* if we have wp, we can do whatever we like */
        if (acl_check_access_on_attribute(module,
                                          tmp_ctx,
@@ -591,13 +654,15 @@ static int acl_check_spn(TALLOC_CTX *mem_ctx,
                                    &acl_res, req->op.mod.message->dn,
                                    acl_attrs,
                                    DSDB_FLAG_NEXT_MODULE |
-                                   DSDB_SEARCH_SHOW_DELETED, req);
+                                   DSDB_FLAG_AS_SYSTEM |
+                                   DSDB_SEARCH_SHOW_RECYCLED,
+                                   req);
        if (ret != LDB_SUCCESS) {
                talloc_free(tmp_ctx);
                return ret;
        }
 
-       userAccountControl = ldb_msg_find_attr_as_int(acl_res->msgs[0], "userAccountControl", 0);
+       userAccountControl = ldb_msg_find_attr_as_uint(acl_res->msgs[0], "userAccountControl", 0);
        dnsHostName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "dnsHostName", NULL);
        samAccountName = ldb_msg_find_attr_as_string(acl_res->msgs[0], "samAccountName", NULL);
 
@@ -605,7 +670,8 @@ static int acl_check_spn(TALLOC_CTX *mem_ctx,
                                 &netbios_res, partitions_dn,
                                 LDB_SCOPE_ONELEVEL,
                                 netbios_attrs,
-                                DSDB_FLAG_NEXT_MODULE,
+                                DSDB_FLAG_NEXT_MODULE |
+                                DSDB_FLAG_AS_SYSTEM,
                                 req,
                                 "(ncName=%s)",
                                 ldb_dn_get_linearized(ldb_get_default_basedn(ldb)));
@@ -619,6 +685,20 @@ static int acl_check_spn(TALLOC_CTX *mem_ctx,
                                         "Error finding element for servicePrincipalName.");
        }
 
+       /* NTDSDSA objectGuid of object we are checking SPN for */
+       if (userAccountControl & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
+               ret = dsdb_module_find_ntdsguid_for_computer(module, tmp_ctx,
+                                                            req->op.mod.message->dn, &ntds, req);
+               if (ret != LDB_SUCCESS) {
+                       ldb_asprintf_errstring(ldb, "Failed to find NTDSDSA objectGuid for %s: %s",
+                                              ldb_dn_get_linearized(req->op.mod.message->dn),
+                                              ldb_strerror(ret));
+                       talloc_free(tmp_ctx);
+                       return LDB_ERR_OPERATIONS_ERROR;
+               }
+               ntds_guid = GUID_string(tmp_ctx, &ntds);
+       }
+
        for (i=0; i < el->num_values; i++) {
                ret = acl_validate_spn_value(tmp_ctx,
                                             ldb,
@@ -681,7 +761,9 @@ static int acl_add(struct ldb_module *module, struct ldb_request *req)
 
        oc_el = ldb_msg_find_element(req->op.add.message, "objectClass");
        if (!oc_el || oc_el->num_values == 0) {
-               DEBUG(10,("acl:operation error %s\n", ldb_dn_get_linearized(req->op.add.message->dn)));
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                      "acl: unable to find objectClass on %s\n",
+                                      ldb_dn_get_linearized(req->op.add.message->dn));
                return ldb_module_done(req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
        }
 
@@ -836,6 +918,26 @@ static int acl_check_password_rights(TALLOC_CTX *mem_ctx,
        return ret;
 }
 
+static const struct GUID *get_oc_guid_from_message(const struct dsdb_schema *schema,
+                                                  struct ldb_message *msg)
+{
+       struct ldb_message_element *oc_el;
+       const struct dsdb_class *object_class;
+
+       oc_el = ldb_msg_find_element(msg, "objectClass");
+       if (!oc_el) {
+               return NULL;
+       }
+
+       object_class = dsdb_get_last_structural_class(schema, oc_el);
+       if (object_class == NULL) {
+               return NULL;
+       }
+
+       return &object_class->schemaIDGUID;
+}
+
+
 static int acl_modify(struct ldb_module *module, struct ldb_request *req)
 {
        int ret;
@@ -877,7 +979,10 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
        }
        ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res, req->op.mod.message->dn,
                                    acl_attrs,
-                                   DSDB_FLAG_NEXT_MODULE, req);
+                                   DSDB_FLAG_NEXT_MODULE |
+                                   DSDB_FLAG_AS_SYSTEM |
+                                   DSDB_SEARCH_SHOW_RECYCLED,
+                                   req);
 
        if (ret != LDB_SUCCESS) {
                goto fail;
@@ -900,7 +1005,7 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
                goto success;
        }
 
-       guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+       guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
        if (!guid) {
                talloc_free(tmp_ctx);
                return ldb_error(ldb, LDB_ERR_OPERATIONS_ERROR,
@@ -919,15 +1024,29 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
                                                         req->op.mod.message->elements[i].name);
 
                if (ldb_attr_cmp("nTSecurityDescriptor", req->op.mod.message->elements[i].name) == 0) {
+                       uint32_t sd_flags = dsdb_request_sd_flags(req, NULL);
+                       uint32_t access_mask = 0;
+
+                       if (sd_flags & (SECINFO_OWNER|SECINFO_GROUP)) {
+                               access_mask |= SEC_STD_WRITE_OWNER;
+                       }
+                       if (sd_flags & SECINFO_DACL) {
+                               access_mask |= SEC_STD_WRITE_DAC;
+                       }
+                       if (sd_flags & SECINFO_SACL) {
+                               access_mask |= SEC_FLAG_SYSTEM_SECURITY;
+                       }
+
                        status = sec_access_check_ds(sd, acl_user_token(module),
-                                            SEC_STD_WRITE_DAC,
+                                            access_mask,
                                             &access_granted,
                                             NULL,
                                             sid);
 
                        if (!NT_STATUS_IS_OK(status)) {
-                               DEBUG(10, ("Object %s has no write dacl access\n",
-                                          ldb_dn_get_linearized(req->op.mod.message->dn)));
+                               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                                      "Object %s has no write dacl access\n",
+                                                      ldb_dn_get_linearized(req->op.mod.message->dn));
                                dsdb_acl_debug(sd,
                                               acl_user_token(module),
                                               req->op.mod.message->dn,
@@ -982,7 +1101,7 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
 
                /* This basic attribute existence check with the right errorcode
                 * is needed since this module is the first one which requests
-                * schema attribute informations.
+                * schema attribute information.
                 * The complete attribute checking is done in the
                 * "objectclass_attrs" module behind this one.
                 */
@@ -996,14 +1115,16 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
                        if (!insert_in_object_tree(tmp_ctx,
                                                   &attr->attributeSecurityGUID, SEC_ADS_WRITE_PROP,
                                                   &new_node, &new_node)) {
-                               DEBUG(10, ("acl_modify: cannot add to object tree securityGUID\n"));
+                               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                                      "acl_modify: cannot add to object tree securityGUID\n");
                                ret = LDB_ERR_OPERATIONS_ERROR;
                                goto fail;
                        }
 
                        if (!insert_in_object_tree(tmp_ctx,
                                                   &attr->schemaIDGUID, SEC_ADS_WRITE_PROP, &new_node, &new_node)) {
-                               DEBUG(10, ("acl_modify: cannot add to object tree attributeGUID\n"));
+                               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                                      "acl_modify: cannot add to object tree attributeGUID\n");
                                ret = LDB_ERR_OPERATIONS_ERROR;
                                goto fail;
                        }
@@ -1018,13 +1139,14 @@ static int acl_modify(struct ldb_module *module, struct ldb_request *req)
                                             sid);
 
                if (!NT_STATUS_IS_OK(status)) {
-                       DEBUG(10, ("Object %s has no write property access\n",
-                                  ldb_dn_get_linearized(req->op.mod.message->dn)));
+                       ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                              "Object %s has no write property access\n",
+                                              ldb_dn_get_linearized(req->op.mod.message->dn));
                        dsdb_acl_debug(sd,
-                                 acl_user_token(module),
-                                 req->op.mod.message->dn,
-                                 true,
-                                 10);
+                                      acl_user_token(module),
+                                      req->op.mod.message->dn,
+                                      true,
+                                      10);
                        ret = LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
                        goto fail;
                }
@@ -1155,6 +1277,7 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
        ret = dsdb_module_search_dn(module, tmp_ctx, &acl_res,
                                    req->op.rename.olddn, acl_attrs,
                                    DSDB_FLAG_NEXT_MODULE |
+                                   DSDB_FLAG_AS_SYSTEM |
                                    DSDB_SEARCH_SHOW_RECYCLED, req);
        /* we sould be able to find the parent */
        if (ret != LDB_SUCCESS) {
@@ -1170,7 +1293,7 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
                return ldb_operr(ldb);
        }
 
-       guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+       guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
        if (!insert_in_object_tree(tmp_ctx, guid, SEC_ADS_WRITE_PROP,
                                   &root, &new_node)) {
                talloc_free(tmp_ctx);
@@ -1217,8 +1340,9 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
                                     sid);
 
        if (!NT_STATUS_IS_OK(status)) {
-               DEBUG(10, ("Object %s has no wp on name\n",
-                          ldb_dn_get_linearized(req->op.rename.olddn)));
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                      "Object %s has no wp on name\n",
+                                      ldb_dn_get_linearized(req->op.rename.olddn));
                dsdb_acl_debug(sd,
                          acl_user_token(module),
                          req->op.rename.olddn,
@@ -1237,16 +1361,19 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
        /* new parent should have create child */
        root = NULL;
        new_node = NULL;
-       guid = get_oc_guid_from_message(module, schema, acl_res->msgs[0]);
+       guid = get_oc_guid_from_message(schema, acl_res->msgs[0]);
        if (!guid) {
-               DEBUG(10,("acl:renamed object has no object class\n"));
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                      "acl:renamed object has no object class\n");
                talloc_free(tmp_ctx);
                return ldb_module_done(req, NULL, NULL,  LDB_ERR_OPERATIONS_ERROR);
        }
 
        ret = dsdb_module_check_access_on_dn(module, req, newparent, SEC_ADS_CREATE_CHILD, guid, req);
        if (ret != LDB_SUCCESS) {
-               DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                      "acl:access_denied renaming %s",
+                                      ldb_dn_get_linearized(req->op.rename.olddn));
                talloc_free(tmp_ctx);
                return ret;
        }
@@ -1265,7 +1392,8 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
        /* what about delete child on the current parent */
        ret = dsdb_module_check_access_on_dn(module, req, oldparent, SEC_ADS_DELETE_CHILD, NULL, req);
        if (ret != LDB_SUCCESS) {
-               DEBUG(10,("acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn)));
+               ldb_asprintf_errstring(ldb_module_get_ctx(module),
+                                      "acl:access_denied renaming %s", ldb_dn_get_linearized(req->op.rename.olddn));
                talloc_free(tmp_ctx);
                return ldb_module_done(req, NULL, NULL, ret);
        }
@@ -1275,9 +1403,66 @@ static int acl_rename(struct ldb_module *module, struct ldb_request *req)
        return ldb_next_request(module, req);
 }
 
+static int acl_search_update_confidential_attrs(struct acl_context *ac,
+                                               struct acl_private *data)
+{
+       struct dsdb_attribute *a;
+       uint32_t n = 0;
+
+       if (data->acl_search) {
+               /*
+                * if acl:search is activated we
+                * the acl_read module protects
+                * confidential attributes.
+                */
+               return LDB_SUCCESS;
+       }
+
+       if ((ac->schema == data->cached_schema_ptr) &&
+           (ac->schema->loaded_usn == data->cached_schema_loaded_usn) &&
+           (ac->schema->metadata_usn == data->cached_schema_metadata_usn))
+       {
+               return LDB_SUCCESS;
+       }
+
+       data->cached_schema_ptr = NULL;
+       data->cached_schema_loaded_usn = 0;
+       data->cached_schema_metadata_usn = 0;
+       TALLOC_FREE(data->confidential_attrs);
+
+       if (ac->schema == NULL) {
+               return LDB_SUCCESS;
+       }
+
+       for (a = ac->schema->attributes; a; a = a->next) {
+               const char **attrs = data->confidential_attrs;
+
+               if (!(a->searchFlags & SEARCH_FLAG_CONFIDENTIAL)) {
+                       continue;
+               }
+
+               attrs = talloc_realloc(data, attrs, const char *, n + 2);
+               if (attrs == NULL) {
+                       TALLOC_FREE(data->confidential_attrs);
+                       return ldb_module_oom(ac->module);
+               }
+
+               attrs[n] = a->lDAPDisplayName;
+               attrs[n+1] = NULL;
+               n++;
+
+               data->confidential_attrs = attrs;
+       }
+
+       data->cached_schema_ptr = ac->schema;
+       data->cached_schema_loaded_usn = ac->schema->loaded_usn;
+       data->cached_schema_metadata_usn = ac->schema->metadata_usn;
+
+       return LDB_SUCCESS;
+}
+
 static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 {
-       struct ldb_context *ldb;
        struct acl_context *ac;
        struct acl_private *data;
        struct ldb_result *acl_res;
@@ -1292,8 +1477,6 @@ static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 
        ac = talloc_get_type(req->context, struct acl_context);
        data = talloc_get_type(ldb_module_get_private(ac->module), struct acl_private);
-       ldb = ldb_module_get_ctx(ac->module);
-
        if (!ares) {
                return ldb_module_done(ac->req, NULL, NULL,
                                       LDB_ERR_OPERATIONS_ERROR);
@@ -1305,57 +1488,95 @@ static int acl_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 
        switch (ares->type) {
        case LDB_REPLY_ENTRY:
-               if (ac->allowedAttributes 
-                   || ac->allowedChildClasses
-                   || ac->allowedChildClassesEffective
-                   || ac->allowedAttributesEffective
-                   || ac->sDRightsEffective) {
+               if (ac->constructed_attrs) {
                        ret = dsdb_module_search_dn(ac->module, ac, &acl_res, ares->message->dn, 
                                                    acl_attrs,
-                                                   DSDB_FLAG_NEXT_MODULE, req);
+                                                   DSDB_FLAG_NEXT_MODULE |
+                                                   DSDB_FLAG_AS_SYSTEM |
+                                                   DSDB_SEARCH_SHOW_RECYCLED,
+                                                   req);
                        if (ret != LDB_SUCCESS) {
                                return ldb_module_done(ac->req, NULL, NULL, ret);
                        }
-                       if (ac->allowedAttributes || ac->allowedAttributesEffective) {
-                               ret = acl_allowedAttributes(ac->module, ac->schema, acl_res->msgs[0], ares->message, ac);
-                               if (ret != LDB_SUCCESS) {
-                                       return ldb_module_done(ac->req, NULL, NULL, ret);
-                               }
+               }
+
+               if (ac->allowedAttributes || ac->allowedAttributesEffective) {
+                       ret = acl_allowedAttributes(ac->module, ac->schema,
+                                                   acl_res->msgs[0],
+                                                   ares->message, ac);
+                       if (ret != LDB_SUCCESS) {
+                               return ldb_module_done(ac->req, NULL, NULL, ret);
                        }
-                       if (ac->allowedChildClasses) {
-                               ret = acl_childClasses(ac->module, ac->schema, acl_res->msgs[0],
-                                                      ares->message, "allowedChildClasses");
-                               if (ret != LDB_SUCCESS) {
-                                       return ldb_module_done(ac->req, NULL, NULL, ret);
-                               }
+               }
+
+               if (ac->allowedChildClasses) {
+                       ret = acl_childClasses(ac->module, ac->schema,
+                                              acl_res->msgs[0],
+                                              ares->message,
+                                              "allowedChildClasses");
+                       if (ret != LDB_SUCCESS) {
+                               return ldb_module_done(ac->req, NULL, NULL, ret);
                        }
-                       if (ac->allowedChildClassesEffective) {
-                               ret = acl_childClassesEffective(ac->module, ac->schema,
-                                                               acl_res->msgs[0], ares->message, ac);
-                               if (ret != LDB_SUCCESS) {
-                                       return ldb_module_done(ac->req, NULL, NULL, ret);
-                               }
+               }
+
+               if (ac->allowedChildClassesEffective) {
+                       ret = acl_childClassesEffective(ac->module, ac->schema,
+                                                       acl_res->msgs[0],
+                                                       ares->message, ac);
+                       if (ret != LDB_SUCCESS) {
+                               return ldb_module_done(ac->req, NULL, NULL, ret);
                        }
-                       if (ac->sDRightsEffective) {
-                               ret = acl_sDRightsEffective(ac->module, 
-                                                           acl_res->msgs[0], ares->message, ac);
-                               if (ret != LDB_SUCCESS) {
-                                       return ldb_module_done(ac->req, NULL, NULL, ret);
-                               }
+               }
+
+               if (ac->sDRightsEffective) {
+                       ret = acl_sDRightsEffective(ac->module,
+                                                   acl_res->msgs[0],
+                                                   ares->message, ac);
+                       if (ret != LDB_SUCCESS) {
+                               return ldb_module_done(ac->req, NULL, NULL, ret);
                        }
                }
-               if (data && data->password_attrs) {
-                       if (!ac->am_system) {
-                               for (i = 0; data->password_attrs[i]; i++) {
-                                       if ((!ac->userPassword) &&
-                                           (ldb_attr_cmp(data->password_attrs[i],
-                                                         "userPassword") == 0))
-                                               continue;
 
-                                       ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
+               if (data == NULL) {
+                       return ldb_module_send_entry(ac->req, ares->message,
+                                                    ares->controls);
+               }
+
+               if (ac->am_system) {
+                       return ldb_module_send_entry(ac->req, ares->message,
+                                                    ares->controls);
+               }
+
+               if (data->password_attrs != NULL) {
+                       for (i = 0; data->password_attrs[i]; i++) {
+                               if ((!ac->userPassword) &&
+                                   (ldb_attr_cmp(data->password_attrs[i],
+                                                 "userPassword") == 0))
+                               {
+                                               continue;
                                }
+
+                               ldb_msg_remove_attr(ares->message, data->password_attrs[i]);
                        }
                }
+
+               if (ac->am_administrator) {
+                       return ldb_module_send_entry(ac->req, ares->message,
+                                                    ares->controls);
+               }
+
+               ret = acl_search_update_confidential_attrs(ac, data);
+               if (ret != LDB_SUCCESS) {
+                       return ret;
+               }
+
+               if (data->confidential_attrs != NULL) {
+                       for (i = 0; data->confidential_attrs[i]; i++) {
+                               ldb_msg_remove_attr(ares->message,
+                                                   data->confidential_attrs[i]);
+                       }
+               }
+
                return ldb_module_send_entry(ac->req, ares->message, ares->controls);
 
        case LDB_REPLY_REFERRAL:
@@ -1373,6 +1594,7 @@ static int acl_search(struct ldb_module *module, struct ldb_request *req)
 {
        struct ldb_context *ldb;
        struct acl_context *ac;
+       struct ldb_parse_tree *down_tree;
        struct ldb_request *down_req;
        struct acl_private *data;
        int ret;
@@ -1389,6 +1611,9 @@ static int acl_search(struct ldb_module *module, struct ldb_request *req)
        ac->module = module;
        ac->req = req;
        ac->am_system = dsdb_module_am_system(module);
+       ac->am_administrator = dsdb_module_am_administrator(module);
+       ac->constructed_attrs = false;
+       ac->modify_search = true;
        ac->allowedAttributes = ldb_attr_in_list(req->op.search.attrs, "allowedAttributes");
        ac->allowedAttributesEffective = ldb_attr_in_list(req->op.search.attrs, "allowedAttributesEffective");
        ac->allowedChildClasses = ldb_attr_in_list(req->op.search.attrs, "allowedChildClasses");
@@ -1397,30 +1622,61 @@ static int acl_search(struct ldb_module *module, struct ldb_request *req)
        ac->userPassword = dsdb_user_password_support(module, ac, req);
        ac->schema = dsdb_get_schema(ldb, ac);
 
-       /* replace any attributes in the parse tree that are private,
-          so we don't allow a search for 'userPassword=penguin',
-          just as we would not allow that attribute to be returned */
+       ac->constructed_attrs |= ac->allowedAttributes;
+       ac->constructed_attrs |= ac->allowedChildClasses;
+       ac->constructed_attrs |= ac->allowedChildClassesEffective;
+       ac->constructed_attrs |= ac->allowedAttributesEffective;
+       ac->constructed_attrs |= ac->sDRightsEffective;
+
+       if (data == NULL) {
+               ac->modify_search = false;
+       }
        if (ac->am_system) {
-               /* FIXME: We should copy the tree and keep the original unmodified. */
-               /* remove password attributes */
-               if (data && data->password_attrs) {
-                       for (i = 0; data->password_attrs[i]; i++) {
-                               if ((!ac->userPassword) &&
-                                   (ldb_attr_cmp(data->password_attrs[i],
-                                                 "userPassword") == 0))
-                                               continue;
+               ac->modify_search = false;
+       }
+
+       if (!ac->constructed_attrs && !ac->modify_search) {
+               return ldb_next_request(module, req);
+       }
+
+       ret = acl_search_update_confidential_attrs(ac, data);
+       if (ret != LDB_SUCCESS) {
+               return ret;
+       }
 
-                               ldb_parse_tree_attr_replace(req->op.search.tree,
-                                                           data->password_attrs[i],
-                                                           "kludgeACLredactedattribute");
+       down_tree = ldb_parse_tree_copy_shallow(ac, req->op.search.tree);
+       if (down_tree == NULL) {
+               return ldb_oom(ldb);
+       }
+
+       if (!ac->am_system && data->password_attrs) {
+               for (i = 0; data->password_attrs[i]; i++) {
+                       if ((!ac->userPassword) &&
+                           (ldb_attr_cmp(data->password_attrs[i],
+                                         "userPassword") == 0))
+                       {
+                               continue;
                        }
+
+                       ldb_parse_tree_attr_replace(down_tree,
+                                                   data->password_attrs[i],
+                                                   "kludgeACLredactedattribute");
                }
        }
+
+       if (!ac->am_system && !ac->am_administrator && data->confidential_attrs) {
+               for (i = 0; data->confidential_attrs[i]; i++) {
+                       ldb_parse_tree_attr_replace(down_tree,
+                                                   data->confidential_attrs[i],
+                                                   "kludgeACLredactedattribute");
+               }
+       }
+
        ret = ldb_build_search_req_ex(&down_req,
                                      ldb, ac,
                                      req->op.search.base,
                                      req->op.search.scope,
-                                     req->op.search.tree,
+                                     down_tree,
                                      req->op.search.attrs,
                                      req->controls,
                                      ac, acl_search_callback,