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712 lines
20 KiB
712 lines
20 KiB
/*
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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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"bytes"
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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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jwtgo "github.com/dgrijalva/jwt-go"
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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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"github.com/minio/minio/pkg/madmin"
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etcd "go.etcd.io/etcd/v3/clientv3"
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"go.etcd.io/etcd/v3/mvcc/mvccpb"
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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(ctx context.Context) *IAMEtcdStore {
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return &IAMEtcdStore{client: globalEtcdClient, ctx: ctx}
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}
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func (ies *IAMEtcdStore) lock() {
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ies.Lock()
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}
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func (ies *IAMEtcdStore) unlock() {
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ies.Unlock()
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}
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func (ies *IAMEtcdStore) rlock() {
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ies.RLock()
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}
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func (ies *IAMEtcdStore) runlock() {
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ies.RUnlock()
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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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if globalConfigEncrypted {
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data, err = madmin.EncryptData(globalActiveCred.String(), data)
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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 saveKeyEtcd(ies.ctx, 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.ctx, ies.client, path)
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if err != nil {
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return err
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}
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if globalConfigEncrypted {
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pdata, err = madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(pdata))
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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 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.ctx, ies.client, path)
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}
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func (ies *IAMEtcdStore) migrateUsersConfigToV1(ctx context.Context, 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(ctx, defaultContextTimeout)
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defer cancel()
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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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userType := regularUser
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if isSTS {
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userType = stsUser
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}
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path := getMappedPolicyPath(user, userType, 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.Equal(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(ctx, 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(ctx context.Context) 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 err
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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(ctx, false); err != nil {
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logger.LogIf(ctx, 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(ctx, true); err != nil {
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logger.LogIf(ctx, 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(ctx, 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(ctx context.Context) error {
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return ies.migrateToV1(ctx)
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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(ctx context.Context, m map[string]iampolicy.Policy) error {
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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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, userType IAMUserType, m map[string]auth.Credentials) error {
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var u UserIdentity
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err := ies.loadIAMConfig(&u, getUserIdentityPath(user, userType))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchUser
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}
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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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deleteKeyEtcd(ies.ctx, ies.client, getUserIdentityPath(user, userType))
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deleteKeyEtcd(ies.ctx, ies.client, getMappedPolicyPath(user, userType, false))
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return nil
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}
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// If this is a service account, rotate the session key if we are changing the server creds
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if globalOldCred.IsValid() && u.Credentials.IsServiceAccount() {
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if !globalOldCred.Equal(globalActiveCred) {
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m := jwtgo.MapClaims{}
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stsTokenCallback := func(t *jwtgo.Token) (interface{}, error) {
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return []byte(globalOldCred.SecretKey), nil
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}
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if _, err := jwtgo.ParseWithClaims(u.Credentials.SessionToken, m, stsTokenCallback); err == nil {
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jwt := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, jwtgo.MapClaims(m))
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if token, err := jwt.SignedString([]byte(globalActiveCred.SecretKey)); err == nil {
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u.Credentials.SessionToken = token
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err := ies.saveIAMConfig(&u, getUserIdentityPath(user, userType))
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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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}
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}
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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(ctx context.Context, userType IAMUserType, m map[string]auth.Credentials) error {
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var basePrefix string
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switch userType {
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case srvAccUser:
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basePrefix = iamConfigServiceAccountsPrefix
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case stsUser:
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basePrefix = iamConfigSTSPrefix
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default:
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basePrefix = iamConfigUsersPrefix
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}
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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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, userType, 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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if err == errConfigNotFound {
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return errNoSuchGroup
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}
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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(ctx context.Context, m map[string]GroupInfo) error {
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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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, userType IAMUserType, isGroup bool, m map[string]MappedPolicy) error {
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var p MappedPolicy
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err := ies.loadIAMConfig(&p, getMappedPolicyPath(name, userType, isGroup))
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if err != nil {
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if err == errConfigNotFound {
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return errNoSuchPolicy
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}
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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(ctx context.Context, userType IAMUserType, isGroup bool, m map[string]MappedPolicy) error {
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ctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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var basePrefix string
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if isGroup {
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basePrefix = iamConfigPolicyDBGroupsPrefix
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} else {
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switch userType {
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case srvAccUser:
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basePrefix = iamConfigPolicyDBServiceAccountsPrefix
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case stsUser:
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basePrefix = iamConfigPolicyDBSTSUsersPrefix
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default:
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basePrefix = iamConfigPolicyDBUsersPrefix
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}
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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, userType, 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(ctx context.Context, sys *IAMSys) error {
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iamUsersMap := make(map[string]auth.Credentials)
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iamGroupsMap := make(map[string]GroupInfo)
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iamUserPolicyMap := make(map[string]MappedPolicy)
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iamGroupPolicyMap := make(map[string]MappedPolicy)
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ies.rlock()
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isMinIOUsersSys := sys.usersSysType == MinIOUsersSysType
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ies.runlock()
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ies.lock()
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if err := ies.loadPolicyDocs(ctx, sys.iamPolicyDocsMap); err != nil {
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ies.unlock()
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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(sys.iamPolicyDocsMap)
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ies.unlock()
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if isMinIOUsersSys {
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if err := ies.loadUsers(ctx, regularUser, iamUsersMap); err != nil {
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return err
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}
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if err := ies.loadGroups(ctx, iamGroupsMap); err != nil {
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return err
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}
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}
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// load polices mapped to users
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if err := ies.loadMappedPolicies(ctx, regularUser, 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(ctx, regularUser, true, iamGroupPolicyMap); err != nil {
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return err
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}
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if err := ies.loadUsers(ctx, srvAccUser, iamUsersMap); err != nil {
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return err
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}
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|
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// load STS temp users
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if err := ies.loadUsers(ctx, stsUser, iamUsersMap); err != nil {
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return err
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}
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// load STS policy mappings
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if err := ies.loadMappedPolicies(ctx, stsUser, false, iamUserPolicyMap); err != nil {
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return err
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}
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ies.lock()
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defer ies.Unlock()
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// Merge the new reloaded entries into global map.
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// See issue https://github.com/minio/minio/issues/9651
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// where the present list of entries on disk are not yet
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// latest, there is a small window where this can make
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// valid users invalid.
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for k, v := range iamUsersMap {
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sys.iamUsersMap[k] = v
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}
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for k, v := range iamUserPolicyMap {
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sys.iamUserPolicyMap[k] = v
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}
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// purge any expired entries which became expired now.
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for k, v := range sys.iamUsersMap {
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if v.IsExpired() {
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delete(sys.iamUsersMap, k)
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delete(sys.iamUserPolicyMap, k)
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// Deleting on the etcd is taken care of in the next cycle
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}
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}
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for k, v := range iamGroupPolicyMap {
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sys.iamGroupPolicyMap[k] = v
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}
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for k, v := range iamGroupsMap {
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sys.iamGroupsMap[k] = v
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}
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sys.buildUserGroupMemberships()
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sys.storeFallback = false
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return nil
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|
}
|
|
|
|
func (ies *IAMEtcdStore) savePolicyDoc(policyName string, p iampolicy.Policy) error {
|
|
return ies.saveIAMConfig(&p, getPolicyDocPath(policyName))
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) saveMappedPolicy(name string, userType IAMUserType, isGroup bool, mp MappedPolicy) error {
|
|
return ies.saveIAMConfig(mp, getMappedPolicyPath(name, userType, isGroup))
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) saveUserIdentity(name string, userType IAMUserType, u UserIdentity) error {
|
|
return ies.saveIAMConfig(u, getUserIdentityPath(name, userType))
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) saveGroupInfo(name string, gi GroupInfo) error {
|
|
return ies.saveIAMConfig(gi, getGroupInfoPath(name))
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) deletePolicyDoc(name string) error {
|
|
err := ies.deleteIAMConfig(getPolicyDocPath(name))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchPolicy
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) deleteMappedPolicy(name string, userType IAMUserType, isGroup bool) error {
|
|
err := ies.deleteIAMConfig(getMappedPolicyPath(name, userType, isGroup))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchPolicy
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) deleteUserIdentity(name string, userType IAMUserType) error {
|
|
err := ies.deleteIAMConfig(getUserIdentityPath(name, userType))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchUser
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) deleteGroupInfo(name string) error {
|
|
err := ies.deleteIAMConfig(getGroupInfoPath(name))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchGroup
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) watch(ctx context.Context, sys *IAMSys) {
|
|
for {
|
|
outerLoop:
|
|
// Refresh IAMSys with etcd watch.
|
|
watchCh := ies.client.Watch(ctx,
|
|
iamConfigPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
|
|
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case watchResp, ok := <-watchCh:
|
|
if !ok {
|
|
time.Sleep(1 * time.Second)
|
|
// Upon an error on watch channel
|
|
// re-init the watch channel.
|
|
goto outerLoop
|
|
}
|
|
if err := watchResp.Err(); err != nil {
|
|
logger.LogIf(ctx, err)
|
|
// log and retry.
|
|
time.Sleep(1 * time.Second)
|
|
// Upon an error on watch channel
|
|
// re-init the watch channel.
|
|
goto outerLoop
|
|
}
|
|
for _, event := range watchResp.Events {
|
|
ies.lock()
|
|
ies.reloadFromEvent(sys, event)
|
|
ies.unlock()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// sys.RLock is held by caller.
|
|
func (ies *IAMEtcdStore) reloadFromEvent(sys *IAMSys, event *etcd.Event) {
|
|
eventCreate := event.IsModify() || event.IsCreate()
|
|
eventDelete := event.Type == etcd.EventTypeDelete
|
|
usersPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigUsersPrefix)
|
|
groupsPrefix := strings.HasPrefix(string(event.Kv.Key), iamConfigGroupsPrefix)
|
|
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, regularUser, sys.iamUsersMap)
|
|
case stsPrefix:
|
|
accessKey := path.Dir(strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigSTSPrefix))
|
|
ies.loadUser(accessKey, stsUser, 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, regularUser, false, sys.iamUserPolicyMap)
|
|
case policyDBSTSUsersPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBSTSUsersPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
ies.loadMappedPolicy(user, stsUser, false, sys.iamUserPolicyMap)
|
|
case policyDBGroupsPrefix:
|
|
policyMapFile := strings.TrimPrefix(string(event.Kv.Key),
|
|
iamConfigPolicyDBGroupsPrefix)
|
|
user := strings.TrimSuffix(policyMapFile, ".json")
|
|
ies.loadMappedPolicy(user, regularUser, 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)
|
|
}
|
|
}
|
|
}
|
|
|