bf9b619d86
Add API to set policy mapping for a user or group Contains a breaking Admin APIs change. - Also enforce all applicable policies - Removes the previous /set-user-policy API Bump up peerRESTVersion Add get user info API to show groups of a user
611 lines
17 KiB
Go
611 lines
17 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"encoding/json"
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"errors"
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"path"
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"strings"
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"sync"
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"time"
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etcd "github.com/coreos/etcd/clientv3"
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"github.com/coreos/etcd/mvcc/mvccpb"
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"github.com/minio/minio-go/v6/pkg/set"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/auth"
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iampolicy "github.com/minio/minio/pkg/iam/policy"
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)
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var defaultContextTimeout = 30 * time.Second
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func etcdKvsToSet(prefix string, kvs []*mvccpb.KeyValue) set.StringSet {
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users := set.NewStringSet()
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for _, kv := range kvs {
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// Extract user by stripping off the `prefix` value as suffix,
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// then strip off the remaining basename to obtain the prefix
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// value, usually in the following form.
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//
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// key := "config/iam/users/newuser/identity.json"
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// prefix := "config/iam/users/"
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// v := trim(trim(key, prefix), base(key)) == "newuser"
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//
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user := path.Clean(strings.TrimSuffix(strings.TrimPrefix(string(kv.Key), prefix), path.Base(string(kv.Key))))
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users.Add(user)
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}
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return users
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}
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func etcdKvsToSetPolicyDB(prefix string, kvs []*mvccpb.KeyValue) set.StringSet {
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items := set.NewStringSet()
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for _, kv := range kvs {
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// Extract user item by stripping off prefix and then
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// stripping of ".json" suffix.
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//
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// key := "config/iam/policydb/users/myuser1.json"
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// prefix := "config/iam/policydb/users/"
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// v := trimSuffix(trimPrefix(key, prefix), ".json")
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key := string(kv.Key)
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item := path.Clean(strings.TrimSuffix(strings.TrimPrefix(key, prefix), ".json"))
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items.Add(item)
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}
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return items
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}
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// IAMEtcdStore implements IAMStorageAPI
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type IAMEtcdStore struct {
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sync.RWMutex
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ctx context.Context
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client *etcd.Client
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}
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func newIAMEtcdStore() *IAMEtcdStore {
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return &IAMEtcdStore{client: globalEtcdClient}
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}
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func (ies *IAMEtcdStore) getContext() context.Context {
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ies.RLock()
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defer ies.RUnlock()
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if ies.ctx == nil {
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return context.Background()
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}
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return ies.ctx
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}
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func (ies *IAMEtcdStore) setContext(ctx context.Context) {
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ies.Lock()
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defer ies.Unlock()
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ies.ctx = ctx
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}
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func (ies *IAMEtcdStore) clearContext() {
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ies.Lock()
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defer ies.Unlock()
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ies.ctx = nil
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}
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func (ies *IAMEtcdStore) saveIAMConfig(item interface{}, path string) error {
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data, err := json.Marshal(item)
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if err != nil {
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return err
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}
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return saveKeyEtcd(ies.getContext(), ies.client, path, data)
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}
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func (ies *IAMEtcdStore) loadIAMConfig(item interface{}, path string) error {
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pdata, err := readKeyEtcd(ies.getContext(), ies.client, path)
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if err != nil {
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return err
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}
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return json.Unmarshal(pdata, item)
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}
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func (ies *IAMEtcdStore) deleteIAMConfig(path string) error {
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return deleteKeyEtcd(ies.getContext(), ies.client, path)
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}
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func (ies *IAMEtcdStore) migrateUsersConfigToV1(isSTS bool) error {
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basePrefix := iamConfigUsersPrefix
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if isSTS {
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basePrefix = iamConfigSTSPrefix
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}
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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defer cancel()
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ies.setContext(ctx)
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defer ies.clearContext()
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r, err := ies.client.Get(ctx, basePrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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users := etcdKvsToSet(basePrefix, r.Kvs)
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for _, user := range users.ToSlice() {
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{
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// 1. check if there is a policy file in the old loc.
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oldPolicyPath := pathJoin(basePrefix, user, iamPolicyFile)
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var policyName string
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err := ies.loadIAMConfig(&policyName, oldPolicyPath)
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if err != nil {
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switch err {
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case errConfigNotFound:
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// No mapped policy or already migrated.
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default:
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// corrupt data/read error, etc
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}
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goto next
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}
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// 2. copy policy to new loc.
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mp := newMappedPolicy(policyName)
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path := getMappedPolicyPath(user, isSTS, false)
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if err := ies.saveIAMConfig(mp, path); err != nil {
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return err
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}
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// 3. delete policy file in old loc.
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deleteKeyEtcd(ctx, ies.client, oldPolicyPath)
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}
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next:
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// 4. check if user identity has old format.
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identityPath := pathJoin(basePrefix, user, iamIdentityFile)
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var cred auth.Credentials
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if err := ies.loadIAMConfig(&cred, identityPath); err != nil {
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switch err {
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case errConfigNotFound:
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// This case should not happen.
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default:
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// corrupt file or read error
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}
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continue
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}
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// If the file is already in the new format,
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// then the parsed auth.Credentials will have
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// the zero value for the struct.
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var zeroCred auth.Credentials
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if cred == zeroCred {
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// nothing to do
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continue
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}
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// Found a id file in old format. Copy value
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// into new format and save it.
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cred.AccessKey = user
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u := newUserIdentity(cred)
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if err := ies.saveIAMConfig(u, identityPath); err != nil {
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logger.LogIf(context.Background(), err)
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return err
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}
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// Nothing to delete as identity file location
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// has not changed.
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}
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return nil
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}
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func (ies *IAMEtcdStore) migrateToV1() error {
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var iamFmt iamFormat
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path := getIAMFormatFilePath()
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if err := ies.loadIAMConfig(&iamFmt, path); err != nil {
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switch err {
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case errConfigNotFound:
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// Need to migrate to V1.
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default:
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return errors.New("corrupt IAM format file")
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}
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} else {
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if iamFmt.Version >= iamFormatVersion1 {
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// Already migrated to V1 of higher!
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return nil
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}
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// This case should not happen
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// (i.e. Version is 0 or negative.)
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return errors.New("got an invalid IAM format version")
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}
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// Migrate long-term users
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if err := ies.migrateUsersConfigToV1(false); err != nil {
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logger.LogIf(context.Background(), err)
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return err
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}
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// Migrate STS users
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if err := ies.migrateUsersConfigToV1(true); err != nil {
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logger.LogIf(context.Background(), err)
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return err
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}
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// Save iam version file.
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if err := ies.saveIAMConfig(newIAMFormatVersion1(), path); err != nil {
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logger.LogIf(context.Background(), err)
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return err
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}
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return nil
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}
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// Should be called under config migration lock
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func (ies *IAMEtcdStore) migrateBackendFormat(objAPI ObjectLayer) error {
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if err := ies.migrateToV1(); err != nil {
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return err
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadPolicyDoc(policy string, m map[string]iampolicy.Policy) error {
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var p iampolicy.Policy
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err := ies.loadIAMConfig(&p, getPolicyDocPath(policy))
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if err != nil {
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return err
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}
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m[policy] = p
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return nil
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}
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func (ies *IAMEtcdStore) loadPolicyDocs(m map[string]iampolicy.Policy) error {
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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defer cancel()
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ies.setContext(ctx)
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defer ies.clearContext()
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r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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policies := etcdKvsToSet(iamConfigPoliciesPrefix, r.Kvs)
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// Reload config and policies for all policys.
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for _, policyName := range policies.ToSlice() {
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err = ies.loadPolicyDoc(policyName, m)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadUser(user string, isSTS bool, m map[string]auth.Credentials) error {
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var u UserIdentity
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err := ies.loadIAMConfig(&u, getUserIdentityPath(user, isSTS))
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if err != nil {
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return err
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}
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if u.Credentials.IsExpired() {
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// Delete expired identity.
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ctx := ies.getContext()
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deleteKeyEtcd(ctx, ies.client, getUserIdentityPath(user, isSTS))
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deleteKeyEtcd(ctx, ies.client, getMappedPolicyPath(user, isSTS, false))
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return nil
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}
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if u.Credentials.AccessKey == "" {
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u.Credentials.AccessKey = user
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}
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m[user] = u.Credentials
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return nil
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}
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func (ies *IAMEtcdStore) loadUsers(isSTS bool, m map[string]auth.Credentials) error {
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basePrefix := iamConfigUsersPrefix
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if isSTS {
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basePrefix = iamConfigSTSPrefix
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}
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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defer cancel()
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ies.setContext(ctx)
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defer ies.clearContext()
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r, err := ies.client.Get(ctx, basePrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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users := etcdKvsToSet(basePrefix, r.Kvs)
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// Reload config for all users.
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for _, user := range users.ToSlice() {
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if err = ies.loadUser(user, isSTS, m); err != nil {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadGroup(group string, m map[string]GroupInfo) error {
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var gi GroupInfo
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err := ies.loadIAMConfig(&gi, getGroupInfoPath(group))
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if err != nil {
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return err
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}
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m[group] = gi
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return nil
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}
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func (ies *IAMEtcdStore) loadGroups(m map[string]GroupInfo) error {
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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defer cancel()
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ies.setContext(ctx)
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defer ies.clearContext()
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r, err := ies.client.Get(ctx, iamConfigGroupsPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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groups := etcdKvsToSet(iamConfigGroupsPrefix, r.Kvs)
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// Reload config for all groups.
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for _, group := range groups.ToSlice() {
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if err = ies.loadGroup(group, m); err != nil {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadMappedPolicy(name string, isSTS, isGroup bool, m map[string]MappedPolicy) error {
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var p MappedPolicy
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err := ies.loadIAMConfig(&p, getMappedPolicyPath(name, isSTS, isGroup))
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if err != nil {
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return err
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}
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m[name] = p
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return nil
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}
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func (ies *IAMEtcdStore) loadMappedPolicies(isSTS, isGroup bool, m map[string]MappedPolicy) error {
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ctx, cancel := context.WithTimeout(context.Background(), defaultContextTimeout)
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defer cancel()
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ies.setContext(ctx)
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defer ies.clearContext()
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var basePrefix string
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switch {
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case isSTS:
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basePrefix = iamConfigPolicyDBSTSUsersPrefix
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case isGroup:
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basePrefix = iamConfigPolicyDBGroupsPrefix
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default:
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basePrefix = iamConfigPolicyDBUsersPrefix
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}
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r, err := ies.client.Get(ctx, basePrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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if err != nil {
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return err
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}
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users := etcdKvsToSetPolicyDB(basePrefix, r.Kvs)
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// Reload config and policies for all users.
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for _, user := range users.ToSlice() {
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if err = ies.loadMappedPolicy(user, isSTS, isGroup, m); err != nil {
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return err
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}
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}
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return nil
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}
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func (ies *IAMEtcdStore) loadAll(sys *IAMSys, objectAPI ObjectLayer) error {
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iamUsersMap := make(map[string]auth.Credentials)
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iamGroupsMap := make(map[string]GroupInfo)
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iamPolicyDocsMap := make(map[string]iampolicy.Policy)
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iamUserPolicyMap := make(map[string]MappedPolicy)
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iamGroupPolicyMap := make(map[string]MappedPolicy)
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if err := ies.loadPolicyDocs(iamPolicyDocsMap); err != nil {
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return err
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}
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if err := ies.loadUsers(false, iamUsersMap); err != nil {
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return err
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}
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// load STS temp users into the same map
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if err := ies.loadUsers(true, iamUsersMap); err != nil {
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return err
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}
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if err := ies.loadGroups(iamGroupsMap); err != nil {
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return err
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}
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if err := ies.loadMappedPolicies(false, false, iamUserPolicyMap); err != nil {
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return err
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}
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// load STS policy mappings into the same map
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if err := ies.loadMappedPolicies(true, false, iamUserPolicyMap); err != nil {
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return err
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}
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// load policies mapped to groups
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if err := ies.loadMappedPolicies(false, true, iamGroupPolicyMap); err != nil {
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return err
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}
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// Sets default canned policies, if none are set.
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setDefaultCannedPolicies(iamPolicyDocsMap)
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sys.Lock()
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defer sys.Unlock()
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sys.iamUsersMap = iamUsersMap
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sys.iamGroupsMap = iamGroupsMap
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sys.iamUserPolicyMap = iamUserPolicyMap
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sys.iamPolicyDocsMap = iamPolicyDocsMap
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sys.iamGroupPolicyMap = iamGroupPolicyMap
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sys.buildUserGroupMemberships()
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return nil
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}
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func (ies *IAMEtcdStore) savePolicyDoc(policyName string, p iampolicy.Policy) error {
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return ies.saveIAMConfig(&p, getPolicyDocPath(policyName))
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}
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func (ies *IAMEtcdStore) saveMappedPolicy(name string, isSTS, isGroup bool, mp MappedPolicy) error {
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return ies.saveIAMConfig(mp, getMappedPolicyPath(name, isSTS, isGroup))
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}
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func (ies *IAMEtcdStore) saveUserIdentity(name string, isSTS bool, u UserIdentity) error {
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return ies.saveIAMConfig(u, getUserIdentityPath(name, isSTS))
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}
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func (ies *IAMEtcdStore) saveGroupInfo(name string, gi GroupInfo) error {
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return ies.saveIAMConfig(gi, getGroupInfoPath(name))
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}
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func (ies *IAMEtcdStore) deletePolicyDoc(name string) error {
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return ies.deleteIAMConfig(getPolicyDocPath(name))
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}
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func (ies *IAMEtcdStore) deleteMappedPolicy(name string, isSTS, isGroup bool) error {
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return ies.deleteIAMConfig(getMappedPolicyPath(name, isSTS, isGroup))
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}
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func (ies *IAMEtcdStore) deleteUserIdentity(name string, isSTS bool) error {
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return ies.deleteIAMConfig(getUserIdentityPath(name, isSTS))
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}
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func (ies *IAMEtcdStore) deleteGroupInfo(name string) error {
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return ies.deleteIAMConfig(getGroupInfoPath(name))
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}
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func (ies *IAMEtcdStore) watch(sys *IAMSys) {
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watchEtcd := func() {
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// Refresh IAMSys with etcd watch.
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for {
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watchCh := ies.client.Watch(context.Background(),
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iamConfigPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
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select {
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case <-GlobalServiceDoneCh:
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return
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case watchResp, ok := <-watchCh:
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if !ok {
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time.Sleep(1 * time.Second)
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continue
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}
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if err := watchResp.Err(); err != nil {
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logger.LogIf(context.Background(), err)
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// log and retry.
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time.Sleep(1 * time.Second)
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continue
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}
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for _, event := range watchResp.Events {
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sys.Lock()
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ies.reloadFromEvent(sys, event)
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sys.Unlock()
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}
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}
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}
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}
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go watchEtcd()
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}
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// sys.RLock is held by caller.
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func (ies *IAMEtcdStore) reloadFromEvent(sys *IAMSys, event *etcd.Event) {
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eventCreate := event.IsModify() || event.IsCreate()
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eventDelete := event.Type == etcd.EventTypeDelete
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usersPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigUsersPrefix)
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groupsPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigGroupsPrefix)
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stsPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigSTSPrefix)
|
|
policyPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigPoliciesPrefix)
|
|
policyDBUsersPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigPolicyDBUsersPrefix)
|
|
policyDBSTSUsersPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigPolicyDBSTSUsersPrefix)
|
|
policyDBGroupsPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigPolicyDBGroupsPrefix)
|
|
|
|
switch {
|
|
case eventCreate:
|
|
switch {
|
|
case usersPrefix:
|
|
accessKey := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigUsersPrefix))
|
|
ies.loadUser(accessKey, false, sys.iamUsersMap)
|
|
case stsPrefix:
|
|
accessKey := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigSTSPrefix))
|
|
ies.loadUser(accessKey, true, sys.iamUsersMap)
|
|
case groupsPrefix:
|
|
group := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigGroupsPrefix))
|
|
ies.loadGroup(group, sys.iamGroupsMap)
|
|
gi := sys.iamGroupsMap[group]
|
|
sys.removeGroupFromMembershipsMap(group)
|
|
sys.updateGroupMembershipsMap(group, &gi)
|
|
case policyPrefix:
|
|
policyName := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPoliciesPrefix))
|
|
ies.loadPolicyDoc(policyName, sys.iamPolicyDocsMap)
|
|
case policyDBUsersPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBUsersPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
ies.loadMappedPolicy(user, false, false, sys.iamUserPolicyMap)
|
|
case policyDBSTSUsersPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBSTSUsersPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
ies.loadMappedPolicy(user, true, false, sys.iamUserPolicyMap)
|
|
case policyDBGroupsPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBGroupsPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
ies.loadMappedPolicy(user, false, true, sys.iamGroupPolicyMap)
|
|
}
|
|
case eventDelete:
|
|
switch {
|
|
case usersPrefix:
|
|
accessKey := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigUsersPrefix))
|
|
delete(sys.iamUsersMap, accessKey)
|
|
case stsPrefix:
|
|
accessKey := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigSTSPrefix))
|
|
delete(sys.iamUsersMap, accessKey)
|
|
case groupsPrefix:
|
|
group := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigGroupsPrefix))
|
|
sys.removeGroupFromMembershipsMap(group)
|
|
delete(sys.iamGroupsMap, group)
|
|
delete(sys.iamGroupPolicyMap, group)
|
|
case policyPrefix:
|
|
policyName := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPoliciesPrefix))
|
|
delete(sys.iamPolicyDocsMap, policyName)
|
|
case policyDBUsersPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBUsersPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
delete(sys.iamUserPolicyMap, user)
|
|
case policyDBSTSUsersPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBSTSUsersPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
delete(sys.iamUserPolicyMap, user)
|
|
case policyDBGroupsPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBGroupsPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
delete(sys.iamGroupPolicyMap, user)
|
|
}
|
|
}
|
|
}
|