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// Copyright (c) 2015-2023 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"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"math/rand"
"net/http"
"runtime"
"strconv"
"strings"
"time"
jsoniter "github.com/json-iterator/go"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/internal/crypto"
xhttp "github.com/minio/minio/internal/http"
"github.com/minio/minio/internal/kms"
"github.com/minio/minio/internal/logger"
"github.com/minio/pkg/env"
"github.com/minio/pkg/wildcard"
"github.com/minio/pkg/workers"
)
// keyrotate:
// apiVersion: v1
// bucket: BUCKET
// prefix: PREFIX
// encryption:
// type: sse-s3 # valid values are sse-s3 and sse-kms
// key: <new-kms-key> # valid only for sse-kms
// context: <new-kms-key-context> # valid only for sse-kms
// # optional flags based filtering criteria
// # for all objects
// flags:
// filter:
// newerThan: "7d" # match objects newer than this value (e.g. 7d10h31s)
// olderThan: "7d" # match objects older than this value (e.g. 7d10h31s)
// createdAfter: "date" # match objects created after "date"
// createdBefore: "date" # match objects created before "date"
// tags:
// - key: "name"
// value: "pick*" # match objects with tag 'name', with all values starting with 'pick'
// metadata:
// - key: "content-type"
// value: "image/*" # match objects with 'content-type', with all values starting with 'image/'
// kmskey: "key-id" # match objects with KMS key-id (applicable only for sse-kms)
// notify:
// endpoint: "https://notify.endpoint" # notification endpoint to receive job status events
// token: "Bearer xxxxx" # optional authentication token for the notification endpoint
// retry:
// attempts: 10 # number of retries for the job before giving up
// delay: "500ms" # least amount of delay between each retry
//go:generate msgp -file $GOFILE -unexported
// BatchKeyRotateKV is a datatype that holds key and values for filtering of objects
// used by metadata filter as well as tags based filtering.
type BatchKeyRotateKV struct {
Key string `yaml:"key" json:"key"`
Value string `yaml:"value" json:"value"`
}
// Validate returns an error if key is empty
func (kv BatchKeyRotateKV) Validate() error {
if kv.Key == "" {
return errInvalidArgument
}
return nil
}
// Empty indicates if kv is not set
func (kv BatchKeyRotateKV) Empty() bool {
return kv.Key == "" && kv.Value == ""
}
// Match matches input kv with kv, value will be wildcard matched depending on the user input
func (kv BatchKeyRotateKV) Match(ikv BatchKeyRotateKV) bool {
if kv.Empty() {
return true
}
if strings.EqualFold(kv.Key, ikv.Key) {
return wildcard.Match(kv.Value, ikv.Value)
}
return false
}
// BatchKeyRotateRetry datatype represents total retry attempts and delay between each retries.
type BatchKeyRotateRetry struct {
Attempts int `yaml:"attempts" json:"attempts"` // number of retry attempts
Delay time.Duration `yaml:"delay" json:"delay"` // delay between each retries
}
// Validate validates input replicate retries.
func (r BatchKeyRotateRetry) Validate() error {
if r.Attempts < 0 {
return errInvalidArgument
}
if r.Delay < 0 {
return errInvalidArgument
}
return nil
}
// BatchKeyRotationType defines key rotation type
type BatchKeyRotationType string
const (
sses3 BatchKeyRotationType = "sse-s3"
ssekms BatchKeyRotationType = "sse-kms"
)
// BatchJobKeyRotateEncryption defines key rotation encryption options passed
type BatchJobKeyRotateEncryption struct {
Type BatchKeyRotationType `yaml:"type" json:"type"`
Key string `yaml:"key" json:"key"`
Context string `yaml:"context" json:"context"`
kmsContext kms.Context `msg:"-"`
}
// Validate validates input key rotation encryption options.
func (e BatchJobKeyRotateEncryption) Validate() error {
if e.Type != sses3 && e.Type != ssekms {
return errInvalidArgument
}
spaces := strings.HasPrefix(e.Key, " ") || strings.HasSuffix(e.Key, " ")
if e.Type == ssekms && spaces {
return crypto.ErrInvalidEncryptionKeyID
}
if e.Type == ssekms && GlobalKMS != nil {
ctx := kms.Context{}
if e.Context != "" {
b, err := base64.StdEncoding.DecodeString(e.Context)
if err != nil {
return err
}
json := jsoniter.ConfigCompatibleWithStandardLibrary
if err := json.Unmarshal(b, &ctx); err != nil {
return err
}
}
e.kmsContext = kms.Context{}
for k, v := range ctx {
e.kmsContext[k] = v
}
ctx["MinIO batch API"] = "batchrotate" // Context for a test key operation
if _, err := GlobalKMS.GenerateKey(GlobalContext, e.Key, ctx); err != nil {
return err
}
}
return nil
}
// BatchKeyRotateFilter holds all the filters currently supported for batch replication
type BatchKeyRotateFilter struct {
NewerThan time.Duration `yaml:"newerThan,omitempty" json:"newerThan"`
OlderThan time.Duration `yaml:"olderThan,omitempty" json:"olderThan"`
CreatedAfter time.Time `yaml:"createdAfter,omitempty" json:"createdAfter"`
CreatedBefore time.Time `yaml:"createdBefore,omitempty" json:"createdBefore"`
Tags []BatchKeyRotateKV `yaml:"tags,omitempty" json:"tags"`
Metadata []BatchKeyRotateKV `yaml:"metadata,omitempty" json:"metadata"`
KMSKeyID string `yaml:"kmskeyid" json:"kmskey"`
}
// BatchKeyRotateNotification success or failure notification endpoint for each job attempts
type BatchKeyRotateNotification struct {
Endpoint string `yaml:"endpoint" json:"endpoint"`
Token string `yaml:"token" json:"token"`
}
// BatchJobKeyRotateFlags various configurations for replication job definition currently includes
// - filter
// - notify
// - retry
type BatchJobKeyRotateFlags struct {
Filter BatchKeyRotateFilter `yaml:"filter" json:"filter"`
Notify BatchKeyRotateNotification `yaml:"notify" json:"notify"`
Retry BatchKeyRotateRetry `yaml:"retry" json:"retry"`
}
// BatchJobKeyRotateV1 v1 of batch key rotation job
type BatchJobKeyRotateV1 struct {
APIVersion string `yaml:"apiVersion" json:"apiVersion"`
Flags BatchJobKeyRotateFlags `yaml:"flags" json:"flags"`
Bucket string `yaml:"bucket" json:"bucket"`
Prefix string `yaml:"prefix" json:"prefix"`
Endpoint string `yaml:"endpoint" json:"endpoint"`
Encryption BatchJobKeyRotateEncryption `yaml:"encryption" json:"encryption"`
}
// Notify notifies notification endpoint if configured regarding job failure or success.
func (r BatchJobKeyRotateV1) Notify(ctx context.Context, body io.Reader) error {
if r.Flags.Notify.Endpoint == "" {
return nil
}
ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
req, err := http.NewRequestWithContext(ctx, http.MethodPost, r.Flags.Notify.Endpoint, body)
if err != nil {
return err
}
if r.Flags.Notify.Token != "" {
req.Header.Set("Authorization", r.Flags.Notify.Token)
}
clnt := http.Client{Transport: getRemoteInstanceTransport}
resp, err := clnt.Do(req)
if err != nil {
return err
}
xhttp.DrainBody(resp.Body)
if resp.StatusCode != http.StatusOK {
return errors.New(resp.Status)
}
return nil
}
// KeyRotate rotates encryption key of an object
func (r *BatchJobKeyRotateV1) KeyRotate(ctx context.Context, api ObjectLayer, objInfo ObjectInfo) error {
srcBucket := r.Bucket
srcObject := objInfo.Name
if objInfo.DeleteMarker || !objInfo.VersionPurgeStatus.Empty() {
return nil
}
sseKMS := crypto.S3KMS.IsEncrypted(objInfo.UserDefined)
sseS3 := crypto.S3.IsEncrypted(objInfo.UserDefined)
if !sseKMS && !sseS3 { // neither sse-s3 nor sse-kms disallowed
return errInvalidEncryptionParameters
}
if sseKMS && r.Encryption.Type == sses3 { // previously encrypted with sse-kms, now sse-s3 disallowed
return errInvalidEncryptionParameters
}
versioned := globalBucketVersioningSys.PrefixEnabled(srcBucket, srcObject)
versionSuspended := globalBucketVersioningSys.PrefixSuspended(srcBucket, srcObject)
lock := api.NewNSLock(r.Bucket, objInfo.Name)
lkctx, err := lock.GetLock(ctx, globalOperationTimeout)
if err != nil {
return err
}
ctx = lkctx.Context()
defer lock.Unlock(lkctx)
opts := ObjectOptions{
VersionID: objInfo.VersionID,
Versioned: versioned,
VersionSuspended: versionSuspended,
NoLock: true,
}
obj, err := api.GetObjectInfo(ctx, r.Bucket, objInfo.Name, opts)
if err != nil {
return err
}
oi := obj.Clone()
var (
newKeyID string
newKeyContext kms.Context
)
encMetadata := make(map[string]string)
for k, v := range oi.UserDefined {
if strings.HasPrefix(strings.ToLower(k), ReservedMetadataPrefixLower) {
encMetadata[k] = v
}
}
if (sseKMS || sseS3) && r.Encryption.Type == ssekms {
if err = r.Encryption.Validate(); err != nil {
return err
}
newKeyID = strings.TrimPrefix(r.Encryption.Key, crypto.ARNPrefix)
newKeyContext = r.Encryption.kmsContext
}
if err = rotateKey(ctx, []byte{}, newKeyID, []byte{}, r.Bucket, oi.Name, encMetadata, newKeyContext); err != nil {
return err
}
// Since we are rotating the keys, make sure to update the metadata.
oi.metadataOnly = true
oi.keyRotation = true
for k, v := range encMetadata {
oi.UserDefined[k] = v
}
if _, err := api.CopyObject(ctx, r.Bucket, oi.Name, r.Bucket, oi.Name, oi, ObjectOptions{
VersionID: oi.VersionID,
}, ObjectOptions{
VersionID: oi.VersionID,
NoLock: true,
}); err != nil {
return err
}
return nil
}
const (
batchKeyRotationName = "batch-rotate.bin"
batchKeyRotationFormat = 1
batchKeyRotateVersionV1 = 1
batchKeyRotateVersion = batchKeyRotateVersionV1
batchKeyRotateAPIVersion = "v1"
batchKeyRotateJobDefaultRetries = 3
batchKeyRotateJobDefaultRetryDelay = 250 * time.Millisecond
)
// Start the batch key rottion job, resumes if there was a pending job via "job.ID"
func (r *BatchJobKeyRotateV1) Start(ctx context.Context, api ObjectLayer, job BatchJobRequest) error {
ri := &batchJobInfo{
JobID: job.ID,
JobType: string(job.Type()),
StartTime: job.Started,
}
if err := ri.load(ctx, api, job); err != nil {
return err
}
globalBatchJobsMetrics.save(job.ID, ri)
lastObject := ri.Object
delay := job.KeyRotate.Flags.Retry.Delay
if delay == 0 {
delay = batchKeyRotateJobDefaultRetryDelay
}
rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
skip := func(info FileInfo) (ok bool) {
if r.Flags.Filter.OlderThan > 0 && time.Since(info.ModTime) < r.Flags.Filter.OlderThan {
// skip all objects that are newer than specified older duration
return false
}
if r.Flags.Filter.NewerThan > 0 && time.Since(info.ModTime) >= r.Flags.Filter.NewerThan {
// skip all objects that are older than specified newer duration
return false
}
if !r.Flags.Filter.CreatedAfter.IsZero() && r.Flags.Filter.CreatedAfter.Before(info.ModTime) {
// skip all objects that are created before the specified time.
return false
}
if !r.Flags.Filter.CreatedBefore.IsZero() && r.Flags.Filter.CreatedBefore.After(info.ModTime) {
// skip all objects that are created after the specified time.
return false
}
if len(r.Flags.Filter.Tags) > 0 {
// Only parse object tags if tags filter is specified.
tagMap := map[string]string{}
tagStr := info.Metadata[xhttp.AmzObjectTagging]
if len(tagStr) != 0 {
t, err := tags.ParseObjectTags(tagStr)
if err != nil {
return false
}
tagMap = t.ToMap()
}
for _, kv := range r.Flags.Filter.Tags {
for t, v := range tagMap {
if kv.Match(BatchKeyRotateKV{Key: t, Value: v}) {
return true
}
}
}
// None of the provided tags filter match skip the object
return false
}
if len(r.Flags.Filter.Metadata) > 0 {
for _, kv := range r.Flags.Filter.Metadata {
for k, v := range info.Metadata {
if !strings.HasPrefix(strings.ToLower(k), "x-amz-meta-") && !isStandardHeader(k) {
continue
}
// We only need to match x-amz-meta or standardHeaders
if kv.Match(BatchKeyRotateKV{Key: k, Value: v}) {
return true
}
}
}
// None of the provided metadata filters match skip the object.
return false
}
if r.Flags.Filter.KMSKeyID != "" {
if v, ok := info.Metadata[xhttp.AmzServerSideEncryptionKmsID]; ok && strings.TrimPrefix(v, crypto.ARNPrefix) != r.Flags.Filter.KMSKeyID {
return false
}
}
return true
}
workerSize, err := strconv.Atoi(env.Get("_MINIO_BATCH_KEYROTATION_WORKERS", strconv.Itoa(runtime.GOMAXPROCS(0)/2)))
if err != nil {
return err
}
wk, err := workers.New(workerSize)
if err != nil {
// invalid worker size.
return err
}
retryAttempts := ri.RetryAttempts
ctx, cancel := context.WithCancel(ctx)
results := make(chan ObjectInfo, 100)
if err := api.Walk(ctx, r.Bucket, r.Prefix, results, ObjectOptions{
WalkMarker: lastObject,
WalkFilter: skip,
}); err != nil {
cancel()
// Do not need to retry if we can't list objects on source.
return err
}
for result := range results {
result := result
sseKMS := crypto.S3KMS.IsEncrypted(result.UserDefined)
sseS3 := crypto.S3.IsEncrypted(result.UserDefined)
if !sseKMS && !sseS3 { // neither sse-s3 nor sse-kms disallowed
continue
}
wk.Take()
go func() {
defer wk.Give()
for attempts := 1; attempts <= retryAttempts; attempts++ {
attempts := attempts
stopFn := globalBatchJobsMetrics.trace(batchKeyRotationMetricObject, job.ID, attempts, result)
success := true
if err := r.KeyRotate(ctx, api, result); err != nil {
stopFn(err)
logger.LogIf(ctx, err)
success = false
} else {
stopFn(nil)
}
ri.trackCurrentBucketObject(r.Bucket, result, success)
ri.RetryAttempts = attempts
globalBatchJobsMetrics.save(job.ID, ri)
// persist in-memory state to disk after every 10secs.
logger.LogIf(ctx, ri.updateAfter(ctx, api, 10*time.Second, job))
if success {
break
}
}
}()
}
wk.Wait()
ri.Complete = ri.ObjectsFailed == 0
ri.Failed = ri.ObjectsFailed > 0
globalBatchJobsMetrics.save(job.ID, ri)
// persist in-memory state to disk.
logger.LogIf(ctx, ri.updateAfter(ctx, api, 0, job))
buf, _ := json.Marshal(ri)
if err := r.Notify(ctx, bytes.NewReader(buf)); err != nil {
logger.LogIf(ctx, fmt.Errorf("unable to notify %v", err))
}
cancel()
if ri.Failed {
ri.ObjectsFailed = 0
ri.Bucket = ""
ri.Object = ""
ri.Objects = 0
time.Sleep(delay + time.Duration(rnd.Float64()*float64(delay)))
}
return nil
}
//msgp:ignore batchKeyRotationJobError
type batchKeyRotationJobError struct {
Code string
Description string
HTTPStatusCode int
}
func (e batchKeyRotationJobError) Error() string {
return e.Description
}
// Validate validates the job definition input
func (r *BatchJobKeyRotateV1) Validate(ctx context.Context, job BatchJobRequest, o ObjectLayer) error {
if r == nil {
return nil
}
if r.APIVersion != batchKeyRotateAPIVersion {
return errInvalidArgument
}
if r.Bucket == "" {
return errInvalidArgument
}
if _, err := o.GetBucketInfo(ctx, r.Bucket, BucketOptions{}); err != nil {
if isErrBucketNotFound(err) {
return batchKeyRotationJobError{
Code: "NoSuchSourceBucket",
Description: "The specified source bucket does not exist",
HTTPStatusCode: http.StatusNotFound,
}
}
return err
}
if GlobalKMS == nil {
return errKMSNotConfigured
}
if err := r.Encryption.Validate(); err != nil {
return err
}
for _, tag := range r.Flags.Filter.Tags {
if err := tag.Validate(); err != nil {
return err
}
}
for _, meta := range r.Flags.Filter.Metadata {
if err := meta.Validate(); err != nil {
return err
}
}
if err := r.Flags.Retry.Validate(); err != nil {
return err
}
return nil
}