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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package casbin
import (
"fmt"
Err "github.com/casbin/casbin/v3/errors"
"github.com/casbin/casbin/v3/log"
"github.com/casbin/casbin/v3/model"
"github.com/casbin/casbin/v3/persist"
)
const (
notImplemented = "not implemented"
)
func (e *Enforcer) shouldPersist() bool {
return e.adapter != nil && e.autoSave
}
func (e *Enforcer) shouldNotify() bool {
return e.watcher != nil && e.autoNotifyWatcher
}
// validateConstraintsForGroupingPolicy validates constraints for grouping policy changes.
// It returns an error if constraint validation fails.
func (e *Enforcer) validateConstraintsForGroupingPolicy() error {
return e.model.ValidateConstraints()
}
// addPolicy adds a rule to the current policy.
func (e *Enforcer) addPolicyWithoutNotify(sec string, ptype string, rule []string) (bool, error) {
defer e.bumpPolicyVersion()
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.AddPolicies(sec, ptype, [][]string{rule})
}
hasPolicy, err := e.model.HasPolicy(sec, ptype, rule)
if hasPolicy || err != nil {
return false, err
}
if e.shouldPersist() {
if err = e.adapter.AddPolicy(sec, ptype, rule); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
err = e.model.AddPolicy(sec, ptype, rule)
if err != nil {
return false, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyAdd, ptype, [][]string{rule})
if err != nil {
return true, err
}
// Validate constraints after adding grouping policy
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return true, nil
}
// addPoliciesWithoutNotify adds rules to the current policy without notify
// If autoRemoveRepeat == true, existing rules are automatically filtered
// Otherwise, false is returned directly.
func (e *Enforcer) addPoliciesWithoutNotify(sec string, ptype string, rules [][]string, autoRemoveRepeat bool) (bool, error) {
defer e.bumpPolicyVersion()
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.AddPolicies(sec, ptype, rules)
}
if !autoRemoveRepeat {
hasPolicies, err := e.model.HasPolicies(sec, ptype, rules)
if hasPolicies || err != nil {
return false, err
}
}
if e.shouldPersist() {
if err := e.adapter.(persist.BatchAdapter).AddPolicies(sec, ptype, rules); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
err := e.model.AddPolicies(sec, ptype, rules)
if err != nil {
return false, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyAdd, ptype, rules)
if err != nil {
return true, err
}
err = e.BuildIncrementalConditionalRoleLinks(model.PolicyAdd, ptype, rules)
if err != nil {
return true, err
}
// Validate constraints after adding grouping policies
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return true, nil
}
// removePolicy removes a rule from the current policy.
func (e *Enforcer) removePolicyWithoutNotify(sec string, ptype string, rule []string) (bool, error) {
defer e.bumpPolicyVersion()
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.RemovePolicies(sec, ptype, [][]string{rule})
}
if e.shouldPersist() {
if err := e.adapter.RemovePolicy(sec, ptype, rule); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
ruleRemoved, err := e.model.RemovePolicy(sec, ptype, rule)
if !ruleRemoved || err != nil {
return ruleRemoved, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, [][]string{rule})
if err != nil {
return ruleRemoved, err
}
// Validate constraints after removing grouping policy
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return ruleRemoved, nil
}
func (e *Enforcer) updatePolicyWithoutNotify(sec string, ptype string, oldRule []string, newRule []string) (bool, error) {
defer e.bumpPolicyVersion()
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.UpdatePolicy(sec, ptype, oldRule, newRule)
}
if e.shouldPersist() {
if err := e.adapter.(persist.UpdatableAdapter).UpdatePolicy(sec, ptype, oldRule, newRule); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
ruleUpdated, err := e.model.UpdatePolicy(sec, ptype, oldRule, newRule)
if !ruleUpdated || err != nil {
return ruleUpdated, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, [][]string{oldRule}) // remove the old rule
if err != nil {
return ruleUpdated, err
}
err = e.BuildIncrementalRoleLinks(model.PolicyAdd, ptype, [][]string{newRule}) // add the new rule
if err != nil {
return ruleUpdated, err
}
// Validate constraints after updating grouping policy
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return ruleUpdated, nil
}
func (e *Enforcer) updatePoliciesWithoutNotify(sec string, ptype string, oldRules [][]string, newRules [][]string) (bool, error) {
defer e.bumpPolicyVersion()
if len(newRules) != len(oldRules) {
return false, fmt.Errorf("the length of oldRules should be equal to the length of newRules, but got the length of oldRules is %d, the length of newRules is %d", len(oldRules), len(newRules))
}
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.UpdatePolicies(sec, ptype, oldRules, newRules)
}
if e.shouldPersist() {
if err := e.adapter.(persist.UpdatableAdapter).UpdatePolicies(sec, ptype, oldRules, newRules); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
ruleUpdated, err := e.model.UpdatePolicies(sec, ptype, oldRules, newRules)
if !ruleUpdated || err != nil {
return ruleUpdated, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, oldRules) // remove the old rules
if err != nil {
return ruleUpdated, err
}
err = e.BuildIncrementalRoleLinks(model.PolicyAdd, ptype, newRules) // add the new rules
if err != nil {
return ruleUpdated, err
}
// Validate constraints after updating grouping policies
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return ruleUpdated, nil
}
// removePolicies removes rules from the current policy.
func (e *Enforcer) removePoliciesWithoutNotify(sec string, ptype string, rules [][]string) (bool, error) {
defer e.bumpPolicyVersion()
if hasPolicies, err := e.model.HasPolicies(sec, ptype, rules); !hasPolicies || err != nil {
return hasPolicies, err
}
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.RemovePolicies(sec, ptype, rules)
}
if e.shouldPersist() {
if err := e.adapter.(persist.BatchAdapter).RemovePolicies(sec, ptype, rules); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
rulesRemoved, err := e.model.RemovePolicies(sec, ptype, rules)
if !rulesRemoved || err != nil {
return rulesRemoved, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, rules)
if err != nil {
return rulesRemoved, err
}
// Validate constraints after removing grouping policies
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return rulesRemoved, nil
}
// removeFilteredPolicy removes rules based on field filters from the current policy.
func (e *Enforcer) removeFilteredPolicyWithoutNotify(sec string, ptype string, fieldIndex int, fieldValues []string) (bool, error) {
defer e.bumpPolicyVersion()
if len(fieldValues) == 0 {
return false, Err.ErrInvalidFieldValuesParameter
}
if e.dispatcher != nil && e.autoNotifyDispatcher {
return true, e.dispatcher.RemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...)
}
if e.shouldPersist() {
if err := e.adapter.RemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...); err != nil {
if err.Error() != notImplemented {
return false, err
}
}
}
ruleRemoved, effects, err := e.model.RemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...)
if !ruleRemoved || err != nil {
return ruleRemoved, err
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, effects)
if err != nil {
return ruleRemoved, err
}
// Validate constraints after removing filtered grouping policies
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return false, err
}
}
return ruleRemoved, nil
}
func (e *Enforcer) updateFilteredPoliciesWithoutNotify(sec string, ptype string, newRules [][]string, fieldIndex int, fieldValues ...string) ([][]string, error) {
defer e.bumpPolicyVersion()
var (
oldRules [][]string
err error
)
if _, err = e.model.GetAssertion(sec, ptype); err != nil {
return oldRules, err
}
if e.shouldPersist() {
if oldRules, err = e.adapter.(persist.UpdatableAdapter).UpdateFilteredPolicies(sec, ptype, newRules, fieldIndex, fieldValues...); err != nil {
if err.Error() != notImplemented {
return nil, err
}
}
// For compatibility, because some adapters return oldRules containing ptype, see https://github.com/casbin/xorm-adapter/issues/49
for i, oldRule := range oldRules {
if len(oldRules[i]) == len(e.model[sec][ptype].Tokens)+1 {
oldRules[i] = oldRule[1:]
}
}
}
if e.dispatcher != nil && e.autoNotifyDispatcher {
return oldRules, e.dispatcher.UpdateFilteredPolicies(sec, ptype, oldRules, newRules)
}
ruleChanged, err := e.model.RemovePolicies(sec, ptype, oldRules)
if err != nil {
return oldRules, err
}
err = e.model.AddPolicies(sec, ptype, newRules)
if err != nil {
return oldRules, err
}
ruleChanged = ruleChanged && len(newRules) != 0
if !ruleChanged {
return make([][]string, 0), nil
}
if sec == "g" {
err := e.BuildIncrementalRoleLinks(model.PolicyRemove, ptype, oldRules) // remove the old rules
if err != nil {
return oldRules, err
}
err = e.BuildIncrementalRoleLinks(model.PolicyAdd, ptype, newRules) // add the new rules
if err != nil {
return oldRules, err
}
// Validate constraints after updating filtered grouping policies
if err := e.validateConstraintsForGroupingPolicy(); err != nil {
return oldRules, err
}
}
return oldRules, nil
}
// addPolicy adds a rule to the current policy.
func (e *Enforcer) addPolicy(sec string, ptype string, rule []string) (bool, error) {
ok, err := e.logPolicyOperation(log.EventAddPolicy, sec, rule, func() (bool, error) {
return e.addPolicyWithoutNotify(sec, ptype, rule)
})
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var notifyErr error
if watcher, isWatcherEx := e.watcher.(persist.WatcherEx); isWatcherEx {
notifyErr = watcher.UpdateForAddPolicy(sec, ptype, rule...)
} else {
notifyErr = e.watcher.Update()
}
return true, notifyErr
}
return true, nil
}
// addPolicies adds rules to the current policy.
// If autoRemoveRepeat == true, existing rules are automatically filtered
// Otherwise, false is returned directly.
func (e *Enforcer) addPolicies(sec string, ptype string, rules [][]string, autoRemoveRepeat bool) (bool, error) {
ok, err := e.addPoliciesWithoutNotify(sec, ptype, rules, autoRemoveRepeat)
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.WatcherEx); ok {
err = watcher.UpdateForAddPolicies(sec, ptype, rules...)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
// removePolicy removes a rule from the current policy.
func (e *Enforcer) removePolicy(sec string, ptype string, rule []string) (bool, error) {
ok, err := e.logPolicyOperation(log.EventRemovePolicy, sec, rule, func() (bool, error) {
return e.removePolicyWithoutNotify(sec, ptype, rule)
})
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var notifyErr error
if watcher, isWatcherEx := e.watcher.(persist.WatcherEx); isWatcherEx {
notifyErr = watcher.UpdateForRemovePolicy(sec, ptype, rule...)
} else {
notifyErr = e.watcher.Update()
}
return true, notifyErr
}
return true, nil
}
func (e *Enforcer) updatePolicy(sec string, ptype string, oldRule []string, newRule []string) (bool, error) {
ok, err := e.updatePolicyWithoutNotify(sec, ptype, oldRule, newRule)
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.UpdatableWatcher); ok {
err = watcher.UpdateForUpdatePolicy(sec, ptype, oldRule, newRule)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
func (e *Enforcer) updatePolicies(sec string, ptype string, oldRules [][]string, newRules [][]string) (bool, error) {
ok, err := e.updatePoliciesWithoutNotify(sec, ptype, oldRules, newRules)
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.UpdatableWatcher); ok {
err = watcher.UpdateForUpdatePolicies(sec, ptype, oldRules, newRules)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
// removePolicies removes rules from the current policy.
func (e *Enforcer) removePolicies(sec string, ptype string, rules [][]string) (bool, error) {
ok, err := e.removePoliciesWithoutNotify(sec, ptype, rules)
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.WatcherEx); ok {
err = watcher.UpdateForRemovePolicies(sec, ptype, rules...)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
// removeFilteredPolicy removes rules based on field filters from the current policy.
func (e *Enforcer) removeFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues []string) (bool, error) {
ok, err := e.removeFilteredPolicyWithoutNotify(sec, ptype, fieldIndex, fieldValues)
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.WatcherEx); ok {
err = watcher.UpdateForRemoveFilteredPolicy(sec, ptype, fieldIndex, fieldValues...)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
func (e *Enforcer) updateFilteredPolicies(sec string, ptype string, newRules [][]string, fieldIndex int, fieldValues ...string) (bool, error) {
oldRules, err := e.updateFilteredPoliciesWithoutNotify(sec, ptype, newRules, fieldIndex, fieldValues...)
ok := len(oldRules) != 0
if !ok || err != nil {
return ok, err
}
if e.shouldNotify() {
var err error
if watcher, ok := e.watcher.(persist.UpdatableWatcher); ok {
err = watcher.UpdateForUpdatePolicies(sec, ptype, oldRules, newRules)
} else {
err = e.watcher.Update()
}
return true, err
}
return true, nil
}
func (e *Enforcer) GetFieldIndex(ptype string, field string) (int, error) {
return e.model.GetFieldIndex(ptype, field)
}
func (e *Enforcer) SetFieldIndex(ptype string, field string, index int) {
assertion := e.model["p"][ptype]
assertion.FieldIndexMutex.Lock()
assertion.FieldIndexMap[field] = index
assertion.FieldIndexMutex.Unlock()
}