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627 lines
17 KiB
Go
627 lines
17 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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"fmt"
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"path"
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"strings"
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"sync"
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"unicode/utf8"
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jsoniter "github.com/json-iterator/go"
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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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)
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// IAMObjectStore implements IAMStorageAPI
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type IAMObjectStore struct {
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// Protect access to storage within the current server.
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sync.RWMutex
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*iamCache
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usersSysType UsersSysType
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objAPI ObjectLayer
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}
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func newIAMObjectStore(objAPI ObjectLayer, usersSysType UsersSysType) *IAMObjectStore {
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return &IAMObjectStore{
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iamCache: newIamCache(),
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objAPI: objAPI,
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usersSysType: usersSysType,
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}
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}
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func (iamOS *IAMObjectStore) rlock() *iamCache {
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iamOS.RLock()
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return iamOS.iamCache
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}
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func (iamOS *IAMObjectStore) runlock() {
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iamOS.RUnlock()
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}
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func (iamOS *IAMObjectStore) lock() *iamCache {
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iamOS.Lock()
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return iamOS.iamCache
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}
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func (iamOS *IAMObjectStore) unlock() {
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iamOS.Unlock()
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}
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func (iamOS *IAMObjectStore) getUsersSysType() UsersSysType {
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return iamOS.usersSysType
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}
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// Migrate users directory in a single scan.
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//
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// 1. Migrate user policy from:
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//
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// `iamConfigUsersPrefix + "<username>/policy.json"`
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//
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// to:
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//
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// `iamConfigPolicyDBUsersPrefix + "<username>.json"`.
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//
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// 2. Add versioning to the policy json file in the new
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// location.
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//
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// 3. Migrate user identity json file to include version info.
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func (iamOS *IAMObjectStore) migrateUsersConfigToV1(ctx context.Context) error {
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basePrefix := iamConfigUsersPrefix
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for item := range listIAMConfigItems(ctx, iamOS.objAPI, basePrefix) {
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if item.Err != nil {
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return item.Err
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}
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user := path.Dir(item.Item)
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{
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// 1. check if there is policy file in old location.
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oldPolicyPath := pathJoin(basePrefix, user, iamPolicyFile)
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var policyName string
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if err := iamOS.loadIAMConfig(ctx, &policyName, oldPolicyPath); err != nil {
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switch err {
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case errConfigNotFound:
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// This case means it is already
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// migrated or there is no policy on
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// user.
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default:
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// File may be corrupt or network error
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}
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// Nothing to do on the policy file,
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// so move on to check the id file.
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goto next
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}
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// 2. copy policy file to new location.
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mp := newMappedPolicy(policyName)
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userType := regUser
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if err := iamOS.saveMappedPolicy(ctx, user, userType, false, mp); err != nil {
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return err
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}
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// 3. delete policy file from old
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// location. Ignore error.
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iamOS.deleteIAMConfig(ctx, 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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cred := auth.Credentials{
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AccessKey: user,
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}
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if err := iamOS.loadIAMConfig(ctx, &cred, identityPath); err != nil {
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switch err {
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case errConfigNotFound:
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// This should not happen.
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default:
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// File may be corrupt or network 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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if !cred.IsValid() {
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// nothing to do
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continue
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}
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u := newUserIdentity(cred)
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if err := iamOS.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 (iamOS *IAMObjectStore) migrateToV1(ctx context.Context) error {
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var iamFmt iamFormat
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path := getIAMFormatFilePath()
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if err := iamOS.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 := iamOS.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 := iamOS.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 (iamOS *IAMObjectStore) migrateBackendFormat(ctx context.Context) error {
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iamOS.Lock()
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defer iamOS.Unlock()
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return iamOS.migrateToV1(ctx)
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}
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func (iamOS *IAMObjectStore) saveIAMConfig(ctx context.Context, item interface{}, objPath string, opts ...options) error {
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json := jsoniter.ConfigCompatibleWithStandardLibrary
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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, objPath),
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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 saveConfig(ctx, iamOS.objAPI, objPath, data)
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}
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func (iamOS *IAMObjectStore) loadIAMConfigBytesWithMetadata(ctx context.Context, objPath string) ([]byte, ObjectInfo, error) {
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data, meta, err := readConfigWithMetadata(ctx, iamOS.objAPI, objPath)
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if err != nil {
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return nil, meta, err
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}
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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, objPath),
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})
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if err != nil {
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return nil, meta, err
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}
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}
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return data, meta, nil
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}
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func (iamOS *IAMObjectStore) loadIAMConfig(ctx context.Context, item interface{}, objPath string) error {
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data, _, err := iamOS.loadIAMConfigBytesWithMetadata(ctx, objPath)
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if err != nil {
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return err
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}
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json := jsoniter.ConfigCompatibleWithStandardLibrary
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return json.Unmarshal(data, item)
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}
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func (iamOS *IAMObjectStore) deleteIAMConfig(ctx context.Context, path string) error {
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return deleteConfig(ctx, iamOS.objAPI, path)
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}
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func (iamOS *IAMObjectStore) loadPolicyDoc(ctx context.Context, policy string, m map[string]PolicyDoc) error {
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data, objInfo, err := iamOS.loadIAMConfigBytesWithMetadata(ctx, 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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var p PolicyDoc
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err = p.parseJSON(data)
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if err != nil {
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return err
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}
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if p.Version == 0 {
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// This means that policy was in the old version (without any
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// timestamp info). We fetch the mod time of the file and save
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// that as create and update date.
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p.CreateDate = objInfo.ModTime
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p.UpdateDate = objInfo.ModTime
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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 (iamOS *IAMObjectStore) loadPolicyDocs(ctx context.Context, m map[string]PolicyDoc) error {
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for item := range listIAMConfigItems(ctx, iamOS.objAPI, iamConfigPoliciesPrefix) {
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if item.Err != nil {
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return item.Err
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}
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policyName := path.Dir(item.Item)
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if err := iamOS.loadPolicyDoc(ctx, policyName, 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 (iamOS *IAMObjectStore) loadUser(ctx context.Context, user string, userType IAMUserType, m map[string]UserIdentity) error {
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var u UserIdentity
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err := iamOS.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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if u.Credentials.IsExpired() {
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// Delete expired identity - ignoring errors here.
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iamOS.deleteIAMConfig(ctx, getUserIdentityPath(user, userType))
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iamOS.deleteIAMConfig(ctx, 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
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return nil
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}
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func (iamOS *IAMObjectStore) loadUsers(ctx context.Context, userType IAMUserType, m map[string]UserIdentity) 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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for item := range listIAMConfigItems(ctx, iamOS.objAPI, basePrefix) {
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if item.Err != nil {
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return item.Err
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}
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userName := path.Dir(item.Item)
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if err := iamOS.loadUser(ctx, userName, userType, m); 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 (iamOS *IAMObjectStore) loadGroup(ctx context.Context, group string, m map[string]GroupInfo) error {
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var g GroupInfo
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err := iamOS.loadIAMConfig(ctx, &g, 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] = g
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return nil
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}
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func (iamOS *IAMObjectStore) loadGroups(ctx context.Context, m map[string]GroupInfo) error {
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for item := range listIAMConfigItems(ctx, iamOS.objAPI, iamConfigGroupsPrefix) {
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if item.Err != nil {
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return item.Err
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}
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group := path.Dir(item.Item)
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if err := iamOS.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 (iamOS *IAMObjectStore) loadMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool,
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m map[string]MappedPolicy,
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) error {
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var p MappedPolicy
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err := iamOS.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 (iamOS *IAMObjectStore) loadMappedPolicies(ctx context.Context, userType IAMUserType, isGroup bool, m map[string]MappedPolicy) error {
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var basePath string
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if isGroup {
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basePath = iamConfigPolicyDBGroupsPrefix
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} else {
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switch userType {
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case svcUser:
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basePath = iamConfigPolicyDBServiceAccountsPrefix
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case stsUser:
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basePath = iamConfigPolicyDBSTSUsersPrefix
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default:
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basePath = iamConfigPolicyDBUsersPrefix
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}
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}
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for item := range listIAMConfigItems(ctx, iamOS.objAPI, basePath) {
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if item.Err != nil {
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return item.Err
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}
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policyFile := item.Item
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userOrGroupName := strings.TrimSuffix(policyFile, ".json")
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if err := iamOS.loadMappedPolicy(ctx, userOrGroupName, userType, isGroup, 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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var (
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usersListKey = "users/"
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svcAccListKey = "service-accounts/"
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groupsListKey = "groups/"
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policiesListKey = "policies/"
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stsListKey = "sts/"
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policyDBUsersListKey = "policydb/users/"
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policyDBSTSUsersListKey = "policydb/sts-users/"
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policyDBServiceAccountsListKey = "policydb/service-accounts/"
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policyDBGroupsListKey = "policydb/groups/"
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allListKeys = []string{
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usersListKey,
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svcAccListKey,
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groupsListKey,
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policiesListKey,
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stsListKey,
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policyDBUsersListKey,
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policyDBSTSUsersListKey,
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policyDBServiceAccountsListKey,
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policyDBGroupsListKey,
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}
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)
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func (iamOS *IAMObjectStore) listAllIAMConfigItems(ctx context.Context) (map[string][]string, error) {
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res := make(map[string][]string)
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for item := range listIAMConfigItems(ctx, iamOS.objAPI, iamConfigPrefix+SlashSeparator) {
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if item.Err != nil {
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return nil, item.Err
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}
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found := false
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for _, listKey := range allListKeys {
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if strings.HasPrefix(item.Item, listKey) {
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found = true
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name := strings.TrimPrefix(item.Item, listKey)
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res[listKey] = append(res[listKey], name)
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break
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}
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}
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if !found && (item.Item != "format.json") {
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logger.LogIf(ctx, fmt.Errorf("unknown type of IAM file listed: %v", item.Item))
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}
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}
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return res, nil
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}
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// Assumes cache is locked by caller.
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func (iamOS *IAMObjectStore) loadAllFromObjStore(ctx context.Context, cache *iamCache) error {
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listedConfigItems, err := iamOS.listAllIAMConfigItems(ctx)
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if err != nil {
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return err
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}
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// Loads things in the same order as `LoadIAMCache()`
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policiesList := listedConfigItems[policiesListKey]
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for _, item := range policiesList {
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policyName := path.Dir(item)
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if err := iamOS.loadPolicyDoc(ctx, policyName, cache.iamPolicyDocsMap); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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setDefaultCannedPolicies(cache.iamPolicyDocsMap)
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if iamOS.usersSysType == MinIOUsersSysType {
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regUsersList := listedConfigItems[usersListKey]
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for _, item := range regUsersList {
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userName := path.Dir(item)
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if err := iamOS.loadUser(ctx, userName, regUser, cache.iamUsersMap); err != nil && err != errNoSuchUser {
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return err
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}
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}
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groupsList := listedConfigItems[groupsListKey]
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for _, item := range groupsList {
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group := path.Dir(item)
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if err := iamOS.loadGroup(ctx, group, cache.iamGroupsMap); err != nil && err != errNoSuchGroup {
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return err
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}
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}
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}
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userPolicyMappingsList := listedConfigItems[policyDBUsersListKey]
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for _, item := range userPolicyMappingsList {
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userName := strings.TrimSuffix(item, ".json")
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if err := iamOS.loadMappedPolicy(ctx, userName, regUser, false, cache.iamUserPolicyMap); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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groupPolicyMappingsList := listedConfigItems[policyDBGroupsListKey]
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for _, item := range groupPolicyMappingsList {
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groupName := strings.TrimSuffix(item, ".json")
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if err := iamOS.loadMappedPolicy(ctx, groupName, regUser, true, cache.iamGroupPolicyMap); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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svcAccList := listedConfigItems[svcAccListKey]
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for _, item := range svcAccList {
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userName := path.Dir(item)
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if err := iamOS.loadUser(ctx, userName, svcUser, cache.iamUsersMap); err != nil && err != errNoSuchUser {
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return err
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}
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}
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stsUsersList := listedConfigItems[stsListKey]
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for _, item := range stsUsersList {
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userName := path.Dir(item)
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if err := iamOS.loadUser(ctx, userName, stsUser, cache.iamUsersMap); err != nil && err != errNoSuchUser {
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return err
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}
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}
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stsPolicyMappingsList := listedConfigItems[policyDBSTSUsersListKey]
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for _, item := range stsPolicyMappingsList {
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stsName := strings.TrimSuffix(item, ".json")
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if err := iamOS.loadMappedPolicy(ctx, stsName, stsUser, false, cache.iamUserPolicyMap); err != nil && err != errNoSuchPolicy {
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return err
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}
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}
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cache.buildUserGroupMemberships()
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return nil
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}
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func (iamOS *IAMObjectStore) savePolicyDoc(ctx context.Context, policyName string, p PolicyDoc) error {
|
|
return iamOS.saveIAMConfig(ctx, &p, getPolicyDocPath(policyName))
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) saveMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool, mp MappedPolicy, opts ...options) error {
|
|
return iamOS.saveIAMConfig(ctx, mp, getMappedPolicyPath(name, userType, isGroup), opts...)
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) saveUserIdentity(ctx context.Context, name string, userType IAMUserType, u UserIdentity, opts ...options) error {
|
|
return iamOS.saveIAMConfig(ctx, u, getUserIdentityPath(name, userType), opts...)
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) saveGroupInfo(ctx context.Context, name string, gi GroupInfo) error {
|
|
return iamOS.saveIAMConfig(ctx, gi, getGroupInfoPath(name))
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) deletePolicyDoc(ctx context.Context, name string) error {
|
|
err := iamOS.deleteIAMConfig(ctx, getPolicyDocPath(name))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchPolicy
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) deleteMappedPolicy(ctx context.Context, name string, userType IAMUserType, isGroup bool) error {
|
|
err := iamOS.deleteIAMConfig(ctx, getMappedPolicyPath(name, userType, isGroup))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchPolicy
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) deleteUserIdentity(ctx context.Context, name string, userType IAMUserType) error {
|
|
err := iamOS.deleteIAMConfig(ctx, getUserIdentityPath(name, userType))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchUser
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (iamOS *IAMObjectStore) deleteGroupInfo(ctx context.Context, name string) error {
|
|
err := iamOS.deleteIAMConfig(ctx, getGroupInfoPath(name))
|
|
if err == errConfigNotFound {
|
|
err = errNoSuchGroup
|
|
}
|
|
return err
|
|
}
|
|
|
|
// helper type for listIAMConfigItems
|
|
type itemOrErr struct {
|
|
Item string
|
|
Err error
|
|
}
|
|
|
|
// Lists files or dirs in the minioMetaBucket at the given path
|
|
// prefix. If dirs is true, only directories are listed, otherwise
|
|
// only objects are listed. All returned items have the pathPrefix
|
|
// removed from their names.
|
|
func listIAMConfigItems(ctx context.Context, objAPI ObjectLayer, pathPrefix string) <-chan itemOrErr {
|
|
ch := make(chan itemOrErr)
|
|
|
|
go func() {
|
|
defer close(ch)
|
|
|
|
// Allocate new results channel to receive ObjectInfo.
|
|
objInfoCh := make(chan ObjectInfo)
|
|
|
|
if err := objAPI.Walk(ctx, minioMetaBucket, pathPrefix, objInfoCh, ObjectOptions{}); err != nil {
|
|
select {
|
|
case ch <- itemOrErr{Err: err}:
|
|
case <-ctx.Done():
|
|
}
|
|
return
|
|
}
|
|
|
|
for obj := range objInfoCh {
|
|
item := strings.TrimPrefix(obj.Name, pathPrefix)
|
|
item = strings.TrimSuffix(item, SlashSeparator)
|
|
select {
|
|
case ch <- itemOrErr{Item: item}:
|
|
case <-ctx.Done():
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
|
|
return ch
|
|
}
|