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Copy pathconfig-encrypted.go
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210 lines (183 loc) · 5.99 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"context"
"fmt"
"path"
"time"
"unicode/utf8"
"github.com/minio/madmin-go"
"github.com/minio/minio/internal/config"
"github.com/minio/minio/internal/kms"
"github.com/minio/minio/internal/logger"
etcd "go.etcd.io/etcd/client/v3"
)
func handleEncryptedConfigBackend(objAPI ObjectLayer) error {
encrypted, err := checkBackendEncrypted(objAPI)
if err != nil {
return fmt.Errorf("Unable to encrypt config %w", err)
}
if err = migrateConfigPrefixToEncrypted(objAPI, encrypted); err != nil {
return fmt.Errorf("Unable to migrate all config at .minio.sys/config/: %w", err)
}
return nil
}
const backendEncryptedFile = "backend-encrypted"
var backendEncryptedMigrationComplete = []byte("encrypted")
func checkBackendEtcdEncrypted(ctx context.Context, client *etcd.Client) (bool, error) {
data, err := readKeyEtcd(ctx, client, backendEncryptedFile)
if err != nil && err != errConfigNotFound {
return false, err
}
return err == nil && bytes.Equal(data, backendEncryptedMigrationComplete), nil
}
func checkBackendEncrypted(objAPI ObjectLayer) (bool, error) {
data, err := readConfig(GlobalContext, objAPI, backendEncryptedFile)
if err != nil && err != errConfigNotFound {
return false, err
}
return err == nil && bytes.Equal(data, backendEncryptedMigrationComplete), nil
}
func migrateIAMConfigsEtcdToEncrypted(ctx context.Context, client *etcd.Client) error {
encrypted, err := checkBackendEtcdEncrypted(ctx, client)
if err != nil {
return err
}
// If backend doesn't have this file means we have already
// attempted then migration
if !encrypted {
return nil
}
if encrypted && GlobalKMS != nil {
stat, err := GlobalKMS.Stat(ctx)
if err != nil {
return err
}
logger.Info(fmt.Sprintf("Attempting to re-encrypt IAM users and policies on etcd with %q (%s)", stat.DefaultKey, stat.Name))
}
listCtx, cancel := context.WithTimeout(ctx, 1*time.Minute)
defer cancel()
r, err := client.Get(listCtx, minioConfigPrefix, etcd.WithPrefix(), etcd.WithKeysOnly())
if err != nil {
return err
}
for _, kv := range r.Kvs {
data, err := readKeyEtcd(ctx, client, string(kv.Key))
if err == errConfigNotFound { // Perhaps not present or someone deleted it.
continue
}
if err != nil {
return err
}
if !utf8.Valid(data) {
pdata, err := madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(data))
if err != nil {
if GlobalKMS != nil {
pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
minioMetaBucket: path.Join(minioMetaBucket, string(kv.Key)),
})
if err != nil {
pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
minioMetaBucket: string(kv.Key),
})
if err != nil {
return fmt.Errorf("Decrypting IAM config failed %w, possibly credentials are incorrect", err)
}
}
} else {
return fmt.Errorf("Decrypting IAM config failed %w, possibly credentials are incorrect", err)
}
}
data = pdata
}
if GlobalKMS != nil {
data, err = config.EncryptBytes(GlobalKMS, data, kms.Context{
minioMetaBucket: path.Join(minioMetaBucket, string(kv.Key)),
})
if err != nil {
return err
}
}
if err = saveKeyEtcd(ctx, client, string(kv.Key), data); err != nil {
return err
}
}
if encrypted && GlobalKMS != nil {
logger.Info("Migration of encrypted IAM config data completed. All data is now encrypted on etcd.")
}
return deleteKeyEtcd(ctx, client, backendEncryptedFile)
}
func migrateConfigPrefixToEncrypted(objAPI ObjectLayer, encrypted bool) error {
if !encrypted {
return nil
}
if encrypted && GlobalKMS != nil {
stat, err := GlobalKMS.Stat(context.Background())
if err != nil {
return err
}
logger.Info(fmt.Sprintf("Attempting to re-encrypt config, IAM users and policies on MinIO with %q (%s)", stat.DefaultKey, stat.Name))
}
results := make(chan ObjectInfo)
if err := objAPI.Walk(GlobalContext, minioMetaBucket, minioConfigPrefix, results, ObjectOptions{}); err != nil {
return err
}
for obj := range results {
data, err := readConfig(GlobalContext, objAPI, obj.Name)
if err != nil {
return err
}
if !utf8.Valid(data) {
pdata, err := madmin.DecryptData(globalActiveCred.String(), bytes.NewReader(data))
if err != nil {
if GlobalKMS != nil {
pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
minioMetaBucket: path.Join(minioMetaBucket, obj.Name),
})
if err != nil {
pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
minioMetaBucket: obj.Name,
})
if err != nil {
return fmt.Errorf("Decrypting IAM config failed %w, possibly credentials are incorrect", err)
}
}
} else {
return fmt.Errorf("Decrypting IAM config failed %w, possibly credentials are incorrect", err)
}
}
data = pdata
}
if GlobalKMS != nil {
data, err = config.EncryptBytes(GlobalKMS, data, kms.Context{
obj.Bucket: path.Join(obj.Bucket, obj.Name),
})
if err != nil {
return err
}
}
if err = saveConfig(GlobalContext, objAPI, obj.Name, data); err != nil {
return err
}
}
if encrypted && GlobalKMS != nil {
logger.Info("Migration of encrypted config data completed. All config data is now encrypted.")
}
return deleteConfig(GlobalContext, objAPI, backendEncryptedFile)
}