mirror of
https://github.com/minio/minio.git
synced 2024-12-25 14:45:54 -05:00
ecd54b4cba
This reverts commit 091a7ae359.
- Ensure all actions accessing storage lock properly.
- Behavior change: policies can be deleted only when they
are not associated with any active credentials.
Also adds fix for accidental canned policy removal that was present in the
reverted version of the change.
575 lines
16 KiB
Go
575 lines
16 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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"path"
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"strings"
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"sync"
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"time"
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"unicode/utf8"
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jsoniter "github.com/json-iterator/go"
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"github.com/minio/minio-go/v7/pkg/set"
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"github.com/minio/minio/internal/auth"
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"github.com/minio/minio/internal/config"
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"github.com/minio/minio/internal/kms"
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"github.com/minio/minio/internal/logger"
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iampolicy "github.com/minio/pkg/iam/policy"
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"go.etcd.io/etcd/api/v3/mvccpb"
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etcd "go.etcd.io/etcd/client/v3"
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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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user := extractPathPrefixAndSuffix(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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// Extract path string by stripping off the `prefix` value and the suffix,
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// value, usually in the following form.
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// s := "config/iam/users/foo/config.json"
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// prefix := "config/iam/users/"
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// suffix := "config.json"
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// result is foo
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func extractPathPrefixAndSuffix(s string, prefix string, suffix string) string {
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return pathClean(strings.TrimSuffix(strings.TrimPrefix(s, prefix), suffix))
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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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*iamCache
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usersSysType UsersSysType
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client *etcd.Client
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}
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func newIAMEtcdStore(client *etcd.Client, usersSysType UsersSysType) *IAMEtcdStore {
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return &IAMEtcdStore{client: client, usersSysType: usersSysType}
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}
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func (ies *IAMEtcdStore) rlock() *iamCache {
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ies.RLock()
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return ies.iamCache
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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) lock() *iamCache {
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ies.Lock()
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return ies.iamCache
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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) getUsersSysType() UsersSysType {
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return ies.usersSysType
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}
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func (ies *IAMEtcdStore) saveIAMConfig(ctx context.Context, item interface{}, itemPath string, opts ...options) 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 GlobalKMS != nil {
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data, err = config.EncryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: path.Join(minioMetaBucket, itemPath),
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})
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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(ctx, ies.client, itemPath, data, opts...)
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}
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func getIAMConfig(item interface{}, data []byte, itemPath string) error {
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var err error
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if !utf8.Valid(data) && GlobalKMS != nil {
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data, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: path.Join(minioMetaBucket, itemPath),
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})
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if err != nil {
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// This fallback is needed because of a bug, in kms.Context{}
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// construction during migration.
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data, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
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minioMetaBucket: itemPath,
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})
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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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var json = jsoniter.ConfigCompatibleWithStandardLibrary
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return json.Unmarshal(data, item)
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}
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func (ies *IAMEtcdStore) loadIAMConfig(ctx context.Context, item interface{}, path string) error {
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data, err := readKeyEtcd(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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return getIAMConfig(item, data, path)
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}
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func (ies *IAMEtcdStore) deleteIAMConfig(ctx context.Context, path string) error {
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return deleteKeyEtcd(ctx, ies.client, path)
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}
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func (ies *IAMEtcdStore) migrateUsersConfigToV1(ctx context.Context) error {
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basePrefix := iamConfigUsersPrefix
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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(ctx, &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 := regUser
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path := getMappedPolicyPath(user, userType, false)
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if err := ies.saveIAMConfig(ctx, 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(ctx, &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(ctx, 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(ctx, &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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// if IAM format
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return err
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}
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}
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if iamFmt.Version >= iamFormatVersion1 {
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// Nothing to do.
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return nil
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}
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if err := ies.migrateUsersConfigToV1(ctx); 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 format to version 1.
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if err := ies.saveIAMConfig(ctx, 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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ies.Lock()
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defer ies.Unlock()
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return ies.migrateToV1(ctx)
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}
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func (ies *IAMEtcdStore) loadPolicyDoc(ctx context.Context, policy string, m map[string]iampolicy.Policy) error {
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var p iampolicy.Policy
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err := ies.loadIAMConfig(ctx, &p, getPolicyDocPath(policy))
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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[policy] = p
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return nil
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}
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func (ies *IAMEtcdStore) getPolicyDocKV(ctx context.Context, kvs *mvccpb.KeyValue, m map[string]iampolicy.Policy) error {
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var p iampolicy.Policy
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err := getIAMConfig(&p, kvs.Value, string(kvs.Key))
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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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policy := extractPathPrefixAndSuffix(string(kvs.Key), iamConfigPoliciesPrefix, path.Base(string(kvs.Key)))
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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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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of policies
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r, err := ies.client.Get(ctx, iamConfigPoliciesPrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all values to construct the policies data model.
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for _, kvs := range r.Kvs {
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if err = ies.getPolicyDocKV(ctx, kvs, m); err != nil && err != errNoSuchPolicy {
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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) getUserKV(ctx context.Context, userkv *mvccpb.KeyValue, userType IAMUserType, m map[string]auth.Credentials, basePrefix string) error {
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var u UserIdentity
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err := getIAMConfig(&u, userkv.Value, string(userkv.Key))
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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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user := extractPathPrefixAndSuffix(string(userkv.Key), basePrefix, path.Base(string(userkv.Key)))
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return ies.addUser(ctx, user, userType, u, m)
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}
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func (ies *IAMEtcdStore) addUser(ctx context.Context, user string, userType IAMUserType, u UserIdentity, m map[string]auth.Credentials) error {
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if u.Credentials.IsExpired() {
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// Delete expired identity.
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deleteKeyEtcd(ctx, ies.client, getUserIdentityPath(user, userType))
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deleteKeyEtcd(ctx, ies.client, getMappedPolicyPath(user, userType, 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) loadUser(ctx context.Context, user string, userType IAMUserType, m map[string]auth.Credentials) error {
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var u UserIdentity
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err := ies.loadIAMConfig(ctx, &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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return ies.addUser(ctx, user, userType, u, m)
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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 svcUser:
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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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cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of users
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r, err := ies.client.Get(cctx, basePrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all users values to create the proper data model
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for _, userKv := range r.Kvs {
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if err = ies.getUserKV(ctx, userKv, userType, m, basePrefix); err != nil && err != errNoSuchUser {
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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(ctx context.Context, group string, m map[string]GroupInfo) error {
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var gi GroupInfo
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err := ies.loadIAMConfig(ctx, &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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cctx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
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defer cancel()
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r, err := ies.client.Get(cctx, 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(ctx, group, m); err != nil && err != errNoSuchGroup {
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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(ctx context.Context, 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(ctx, &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 getMappedPolicy(ctx context.Context, kv *mvccpb.KeyValue, userType IAMUserType, isGroup bool, m map[string]MappedPolicy, basePrefix string) error {
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var p MappedPolicy
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err := getIAMConfig(&p, kv.Value, string(kv.Key))
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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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name := extractPathPrefixAndSuffix(string(kv.Key), basePrefix, ".json")
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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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cctx, 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 svcUser:
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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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// Retrieve all keys and values to avoid too many calls to etcd in case of
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// a large number of policy mappings
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r, err := ies.client.Get(cctx, basePrefix, etcd.WithPrefix())
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if err != nil {
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return err
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}
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// Parse all policies mapping to create the proper data model
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for _, kv := range r.Kvs {
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if err = getMappedPolicy(ctx, kv, userType, isGroup, m, basePrefix); err != nil && err != errNoSuchPolicy {
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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) savePolicyDoc(ctx context.Context, policyName string, p iampolicy.Policy) error {
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return ies.saveIAMConfig(ctx, &p, getPolicyDocPath(policyName))
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}
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func (ies *IAMEtcdStore) saveMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool, mp MappedPolicy, opts ...options) error {
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return ies.saveIAMConfig(ctx, mp, getMappedPolicyPath(name, userType, isGroup), opts...)
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}
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func (ies *IAMEtcdStore) saveUserIdentity(ctx context.Context, name string, userType IAMUserType, u UserIdentity, opts ...options) error {
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return ies.saveIAMConfig(ctx, u, getUserIdentityPath(name, userType), opts...)
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}
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func (ies *IAMEtcdStore) saveGroupInfo(ctx context.Context, name string, gi GroupInfo) error {
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return ies.saveIAMConfig(ctx, gi, getGroupInfoPath(name))
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}
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func (ies *IAMEtcdStore) deletePolicyDoc(ctx context.Context, name string) error {
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err := ies.deleteIAMConfig(ctx, getPolicyDocPath(name))
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if err == errConfigNotFound {
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err = errNoSuchPolicy
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}
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return err
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}
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func (ies *IAMEtcdStore) deleteMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool) error {
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err := ies.deleteIAMConfig(ctx, getMappedPolicyPath(name, userType, isGroup))
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if err == errConfigNotFound {
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err = errNoSuchPolicy
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}
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return err
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}
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func (ies *IAMEtcdStore) deleteUserIdentity(ctx context.Context, name string, userType IAMUserType) error {
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err := ies.deleteIAMConfig(ctx, getUserIdentityPath(name, userType))
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if err == errConfigNotFound {
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err = errNoSuchUser
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}
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return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) deleteGroupInfo(ctx context.Context, name string) error {
|
|
err := ies.deleteIAMConfig(ctx, getGroupInfoPath(name))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchGroup
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (ies *IAMEtcdStore) watch(ctx context.Context, keyPath string) <-chan iamWatchEvent {
|
|
ch := make(chan iamWatchEvent)
|
|
|
|
// go routine to read events from the etcd watch channel and send them
|
|
// down `ch`
|
|
go func() {
|
|
for {
|
|
outerLoop:
|
|
watchCh := ies.client.Watch(ctx,
|
|
keyPath, 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 {
|
|
isCreateEvent := event.IsModify() || event.IsCreate()
|
|
isDeleteEvent := event.Type == etcd.EventTypeDelete
|
|
|
|
switch {
|
|
case isCreateEvent:
|
|
ch <- iamWatchEvent{
|
|
isCreated: true,
|
|
keyPath: string(event.Kv.Key),
|
|
}
|
|
case isDeleteEvent:
|
|
ch <- iamWatchEvent{
|
|
isCreated: false,
|
|
keyPath: string(event.Kv.Key),
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
return ch
|
|
|
|
}
|