mirror of
https://github.com/minio/minio.git
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a1de9cec58
This PR is to ensure that we call the relevant object
layer APIs for necessary S3 API level functionalities
allowing gateway implementations to return proper
errors as NotImplemented{}
This allows for all our tests in mint to behave
appropriately and can be handled appropriately as
well.
536 lines
19 KiB
Go
536 lines
19 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019-2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"context"
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"encoding/xml"
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"errors"
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"math"
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"net/http"
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"path"
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"sync"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/auth"
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objectlock "github.com/minio/minio/pkg/bucket/object/lock"
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"github.com/minio/minio/pkg/bucket/policy"
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)
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// BucketObjectLockSys - map of bucket and retention configuration.
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type BucketObjectLockSys struct {
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sync.RWMutex
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retentionMap map[string]*objectlock.Retention
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}
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// Set - set retention configuration.
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func (sys *BucketObjectLockSys) Set(bucketName string, retention *objectlock.Retention) {
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if globalIsGateway {
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// no-op
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return
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}
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sys.Lock()
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sys.retentionMap[bucketName] = retention
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sys.Unlock()
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}
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// Get - Get retention configuration.
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func (sys *BucketObjectLockSys) Get(bucketName string) (r *objectlock.Retention, ok bool) {
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if globalIsGateway {
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// When gateway is enabled, no cached value
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// is used to validate bucket object lock configuration
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objAPI := newObjectLayerWithoutSafeModeFn()
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if objAPI == nil {
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return
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}
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lc, err := objAPI.GetBucketObjectLockConfig(GlobalContext, bucketName)
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if err != nil {
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return
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}
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return lc.ToRetention(), true
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}
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sys.RLock()
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defer sys.RUnlock()
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r, ok = sys.retentionMap[bucketName]
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return r, ok
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}
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// Remove - removes retention sysuration.
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func (sys *BucketObjectLockSys) Remove(bucketName string) {
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sys.Lock()
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delete(sys.retentionMap, bucketName)
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sys.Unlock()
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}
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// Similar to enforceRetentionBypassForDelete but for WebUI
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func enforceRetentionBypassForDeleteWeb(ctx context.Context, r *http.Request, bucket, object string, getObjectInfoFn GetObjectInfoFn, govBypassPerms bool) APIErrorCode {
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opts, err := getOpts(ctx, r, bucket, object)
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if err != nil {
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return toAPIErrorCode(ctx, err)
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}
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oi, err := getObjectInfoFn(ctx, bucket, object, opts)
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if err != nil {
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return toAPIErrorCode(ctx, err)
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}
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lhold := objectlock.GetObjectLegalHoldMeta(oi.UserDefined)
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if lhold.Status.Valid() && lhold.Status == objectlock.LegalHoldOn {
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return ErrObjectLocked
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}
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ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
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if ret.Mode.Valid() {
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switch ret.Mode {
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case objectlock.RetCompliance:
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// In compliance mode, a protected object version can't be overwritten
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// or deleted by any user, including the root user in your AWS account.
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// When an object is locked in compliance mode, its retention mode can't
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// be changed, and its retention period can't be shortened. Compliance mode
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// ensures that an object version can't be overwritten or deleted for the
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// duration of the retention period.
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return ErrObjectLocked
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}
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if !ret.RetainUntilDate.Before(t) {
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return ErrObjectLocked
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}
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return ErrNone
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case objectlock.RetGovernance:
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// In governance mode, users can't overwrite or delete an object
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// version or alter its lock settings unless they have special
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// permissions. With governance mode, you protect objects against
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// being deleted by most users, but you can still grant some users
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// permission to alter the retention settings or delete the object
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// if necessary. You can also use governance mode to test retention-period
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// settings before creating a compliance-mode retention period.
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// To override or remove governance-mode retention settings, a
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// user must have the s3:BypassGovernanceRetention permission
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// and must explicitly include x-amz-bypass-governance-retention:true
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// as a request header with any request that requires overriding
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// governance mode.
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byPassSet := govBypassPerms && objectlock.IsObjectLockGovernanceBypassSet(r.Header)
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if !byPassSet {
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return ErrObjectLocked
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}
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if !ret.RetainUntilDate.Before(t) {
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return ErrObjectLocked
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}
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if !govBypassPerms {
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return ErrObjectLocked
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}
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return ErrNone
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}
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}
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}
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return ErrNone
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}
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// enforceRetentionForDeletion checks if it is appropriate to remove an
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// object according to locking configuration when this is lifecycle/ bucket quota asking.
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func enforceRetentionForDeletion(ctx context.Context, objInfo ObjectInfo) (locked bool) {
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lhold := objectlock.GetObjectLegalHoldMeta(objInfo.UserDefined)
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if lhold.Status.Valid() && lhold.Status == objectlock.LegalHoldOn {
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return true
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}
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ret := objectlock.GetObjectRetentionMeta(objInfo.UserDefined)
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if ret.Mode.Valid() && (ret.Mode == objectlock.RetCompliance || ret.Mode == objectlock.RetGovernance) {
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return true
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}
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if ret.RetainUntilDate.After(t) {
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return true
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}
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}
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return false
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}
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// enforceRetentionBypassForDelete enforces whether an existing object under governance can be deleted
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// with governance bypass headers set in the request.
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// Objects under site wide WORM can never be overwritten.
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// For objects in "Governance" mode, overwrite is allowed if a) object retention date is past OR
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// governance bypass headers are set and user has governance bypass permissions.
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// Objects in "Compliance" mode can be overwritten only if retention date is past.
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func enforceRetentionBypassForDelete(ctx context.Context, r *http.Request, bucket, object string, getObjectInfoFn GetObjectInfoFn) APIErrorCode {
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opts, err := getOpts(ctx, r, bucket, object)
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if err != nil {
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return toAPIErrorCode(ctx, err)
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}
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oi, err := getObjectInfoFn(ctx, bucket, object, opts)
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if err != nil {
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return toAPIErrorCode(ctx, err)
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}
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lhold := objectlock.GetObjectLegalHoldMeta(oi.UserDefined)
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if lhold.Status.Valid() && lhold.Status == objectlock.LegalHoldOn {
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return ErrObjectLocked
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}
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ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
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if ret.Mode.Valid() {
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switch ret.Mode {
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case objectlock.RetCompliance:
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// In compliance mode, a protected object version can't be overwritten
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// or deleted by any user, including the root user in your AWS account.
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// When an object is locked in compliance mode, its retention mode can't
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// be changed, and its retention period can't be shortened. Compliance mode
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// ensures that an object version can't be overwritten or deleted for the
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// duration of the retention period.
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return ErrObjectLocked
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}
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if !ret.RetainUntilDate.Before(t) {
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return ErrObjectLocked
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}
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return ErrNone
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case objectlock.RetGovernance:
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// In governance mode, users can't overwrite or delete an object
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// version or alter its lock settings unless they have special
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// permissions. With governance mode, you protect objects against
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// being deleted by most users, but you can still grant some users
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// permission to alter the retention settings or delete the object
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// if necessary. You can also use governance mode to test retention-period
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// settings before creating a compliance-mode retention period.
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// To override or remove governance-mode retention settings, a
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// user must have the s3:BypassGovernanceRetention permission
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// and must explicitly include x-amz-bypass-governance-retention:true
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// as a request header with any request that requires overriding
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// governance mode.
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//
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byPassSet := objectlock.IsObjectLockGovernanceBypassSet(r.Header)
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if !byPassSet {
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return ErrObjectLocked
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}
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if !ret.RetainUntilDate.Before(t) {
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return ErrObjectLocked
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}
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return ErrNone
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}
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// https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lock-overview.html#object-lock-retention-modes
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// If you try to delete objects protected by governance mode and have s3:BypassGovernanceRetention
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// or s3:GetBucketObjectLockConfiguration permissions, the operation will succeed.
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govBypassPerms1 := checkRequestAuthType(ctx, r, policy.BypassGovernanceRetentionAction, bucket, object)
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govBypassPerms2 := checkRequestAuthType(ctx, r, policy.GetBucketObjectLockConfigurationAction, bucket, object)
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if govBypassPerms1 != ErrNone && govBypassPerms2 != ErrNone {
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return ErrAccessDenied
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}
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}
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}
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return ErrNone
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}
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// enforceRetentionBypassForPut enforces whether an existing object under governance can be overwritten
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// with governance bypass headers set in the request.
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// Objects under site wide WORM cannot be overwritten.
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// For objects in "Governance" mode, overwrite is allowed if a) object retention date is past OR
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// governance bypass headers are set and user has governance bypass permissions.
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// Objects in compliance mode can be overwritten only if retention date is being extended. No mode change is permitted.
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func enforceRetentionBypassForPut(ctx context.Context, r *http.Request, bucket, object string, getObjectInfoFn GetObjectInfoFn, objRetention *objectlock.ObjectRetention, cred auth.Credentials, owner bool, claims map[string]interface{}) (ObjectInfo, APIErrorCode) {
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byPassSet := objectlock.IsObjectLockGovernanceBypassSet(r.Header)
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opts, err := getOpts(ctx, r, bucket, object)
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if err != nil {
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return ObjectInfo{}, toAPIErrorCode(ctx, err)
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}
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oi, err := getObjectInfoFn(ctx, bucket, object, opts)
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if err != nil {
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return oi, toAPIErrorCode(ctx, err)
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}
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return oi, ErrObjectLocked
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}
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// Pass in relative days from current time, to additionally to verify "object-lock-remaining-retention-days" policy if any.
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days := int(math.Ceil(math.Abs(objRetention.RetainUntilDate.Sub(t).Hours()) / 24))
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ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
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if ret.Mode.Valid() {
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// Retention has expired you may change whatever you like.
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if ret.RetainUntilDate.Before(t) {
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perm := isPutRetentionAllowed(bucket, object,
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days, objRetention.RetainUntilDate.Time,
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objRetention.Mode, byPassSet, r, cred,
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owner, claims)
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return oi, perm
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}
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switch ret.Mode {
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case objectlock.RetGovernance:
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govPerm := isPutRetentionAllowed(bucket, object, days,
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objRetention.RetainUntilDate.Time, objRetention.Mode,
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byPassSet, r, cred, owner, claims)
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// Governance mode retention period cannot be shortened, if x-amz-bypass-governance is not set.
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if !byPassSet {
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if objRetention.Mode != objectlock.RetGovernance || objRetention.RetainUntilDate.Before((ret.RetainUntilDate.Time)) {
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return oi, ErrObjectLocked
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}
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}
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return oi, govPerm
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case objectlock.RetCompliance:
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// Compliance retention mode cannot be changed or shortened.
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// https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lock-overview.html#object-lock-retention-modes
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if objRetention.Mode != objectlock.RetCompliance || objRetention.RetainUntilDate.Before((ret.RetainUntilDate.Time)) {
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return oi, ErrObjectLocked
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}
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compliancePerm := isPutRetentionAllowed(bucket, object,
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days, objRetention.RetainUntilDate.Time, objRetention.Mode,
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false, r, cred, owner, claims)
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return oi, compliancePerm
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}
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return oi, ErrNone
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} // No pre-existing retention metadata present.
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perm := isPutRetentionAllowed(bucket, object,
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days, objRetention.RetainUntilDate.Time,
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objRetention.Mode, byPassSet, r, cred, owner, claims)
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return oi, perm
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}
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// checkPutObjectLockAllowed enforces object retention policy and legal hold policy
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// for requests with WORM headers
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// See https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lock-managing.html for the spec.
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// For non-existing objects with object retention headers set, this method returns ErrNone if bucket has
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// locking enabled and user has requisite permissions (s3:PutObjectRetention)
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// If object exists on object store and site wide WORM enabled - this method
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// returns an error. For objects in "Governance" mode, overwrite is allowed if the retention date has expired.
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// For objects in "Compliance" mode, retention date cannot be shortened, and mode cannot be altered.
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// For objects with legal hold header set, the s3:PutObjectLegalHold permission is expected to be set
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// Both legal hold and retention can be applied independently on an object
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func checkPutObjectLockAllowed(ctx context.Context, r *http.Request, bucket, object string, getObjectInfoFn GetObjectInfoFn, retentionPermErr, legalHoldPermErr APIErrorCode) (objectlock.RetMode, objectlock.RetentionDate, objectlock.ObjectLegalHold, APIErrorCode) {
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var mode objectlock.RetMode
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var retainDate objectlock.RetentionDate
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var legalHold objectlock.ObjectLegalHold
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retentionRequested := objectlock.IsObjectLockRetentionRequested(r.Header)
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legalHoldRequested := objectlock.IsObjectLockLegalHoldRequested(r.Header)
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retentionCfg, isWORMBucket := globalBucketObjectLockSys.Get(bucket)
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if !isWORMBucket {
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if legalHoldRequested || retentionRequested {
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return mode, retainDate, legalHold, ErrInvalidBucketObjectLockConfiguration
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}
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// If this not a WORM enabled bucket, we should return right here.
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return mode, retainDate, legalHold, ErrNone
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}
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var objExists bool
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opts, err := getOpts(ctx, r, bucket, object)
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if err != nil {
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return mode, retainDate, legalHold, toAPIErrorCode(ctx, err)
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}
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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if objInfo, err := getObjectInfoFn(ctx, bucket, object, opts); err == nil {
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objExists = true
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r := objectlock.GetObjectRetentionMeta(objInfo.UserDefined)
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if r.Mode == objectlock.RetCompliance && r.RetainUntilDate.After(t) {
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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mode = r.Mode
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retainDate = r.RetainUntilDate
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legalHold = objectlock.GetObjectLegalHoldMeta(objInfo.UserDefined)
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// Disallow overwriting an object on legal hold
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if legalHold.Status == objectlock.LegalHoldOn {
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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}
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if legalHoldRequested {
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var lerr error
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if legalHold, lerr = objectlock.ParseObjectLockLegalHoldHeaders(r.Header); lerr != nil {
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return mode, retainDate, legalHold, toAPIErrorCode(ctx, err)
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}
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}
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if retentionRequested {
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legalHold, err := objectlock.ParseObjectLockLegalHoldHeaders(r.Header)
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if err != nil {
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return mode, retainDate, legalHold, toAPIErrorCode(ctx, err)
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}
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rMode, rDate, err := objectlock.ParseObjectLockRetentionHeaders(r.Header)
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if err != nil {
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return mode, retainDate, legalHold, toAPIErrorCode(ctx, err)
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}
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if objExists && retainDate.After(t) {
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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if retentionPermErr != ErrNone {
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return mode, retainDate, legalHold, retentionPermErr
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}
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return rMode, rDate, legalHold, ErrNone
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}
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if !retentionRequested && isWORMBucket {
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if retentionPermErr != ErrNone {
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return mode, retainDate, legalHold, retentionPermErr
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}
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t, err := objectlock.UTCNowNTP()
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if err != nil {
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logger.LogIf(ctx, err)
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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// AWS S3 just creates a new version of object when an object is being overwritten.
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if objExists && retainDate.After(t) {
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return mode, retainDate, legalHold, ErrObjectLocked
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}
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if !legalHoldRequested && !retentionCfg.IsEmpty() {
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// inherit retention from bucket configuration
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return retentionCfg.Mode, objectlock.RetentionDate{Time: t.Add(retentionCfg.Validity)}, legalHold, ErrNone
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}
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return "", objectlock.RetentionDate{}, legalHold, ErrNone
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}
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return mode, retainDate, legalHold, ErrNone
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}
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func readBucketObjectLockConfig(ctx context.Context, objAPI ObjectLayer, bucket string) (*objectlock.Config, error) {
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meta, err := loadBucketMetadata(ctx, objAPI, bucket)
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if err != nil && err != errMetaDataConverted {
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return nil, toObjectErr(err, bucket)
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}
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if !meta.LockEnabled {
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return nil, BucketObjectLockConfigNotFound{Bucket: bucket}
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}
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configFile := path.Join(bucketConfigPrefix, bucket, objectLockConfig)
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configData, err := readConfig(ctx, objAPI, configFile)
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if err != nil {
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if err != errConfigNotFound {
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return nil, toObjectErr(err, bucket)
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}
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return objectlock.NewObjectLockConfig(), nil
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}
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cfg, err := objectlock.ParseObjectLockConfig(bytes.NewReader(configData))
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if err != nil {
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return nil, toObjectErr(err, bucket)
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}
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return cfg, nil
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}
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func saveBucketObjectLockConfig(ctx context.Context, objAPI ObjectLayer, bucket string, config *objectlock.Config) error {
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meta, err := loadBucketMetadata(ctx, objAPI, bucket)
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if err != nil && err != errMetaDataConverted {
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return toObjectErr(err, bucket)
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}
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if !meta.LockEnabled {
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return BucketObjectLockConfigNotFound{Bucket: bucket}
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}
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data, err := xml.Marshal(config)
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if err != nil {
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return toObjectErr(err, bucket)
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}
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configFile := path.Join(bucketConfigPrefix, bucket, objectLockConfig)
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|
if err = saveConfig(ctx, objAPI, configFile, data); err != nil {
|
|
return toObjectErr(err, bucket)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// NewBucketObjectLockSys returns initialized BucketObjectLockSys
|
|
func NewBucketObjectLockSys() *BucketObjectLockSys {
|
|
return &BucketObjectLockSys{
|
|
retentionMap: make(map[string]*objectlock.Retention),
|
|
}
|
|
}
|
|
|
|
// Init - initializes bucket object lock config system for all buckets
|
|
func (sys *BucketObjectLockSys) Init(buckets []BucketInfo, objAPI ObjectLayer) error {
|
|
if objAPI == nil {
|
|
return errServerNotInitialized
|
|
}
|
|
|
|
// In gateway mode, we always fetch the bucket object lock configuration from the gateway backend.
|
|
// So, this is a no-op for gateway servers.
|
|
if globalIsGateway {
|
|
return nil
|
|
}
|
|
|
|
// Load BucketObjectLockSys once during boot.
|
|
return sys.load(buckets, objAPI)
|
|
}
|
|
|
|
func (sys *BucketObjectLockSys) load(buckets []BucketInfo, objAPI ObjectLayer) error {
|
|
for _, bucket := range buckets {
|
|
ctx := logger.SetReqInfo(GlobalContext, &logger.ReqInfo{BucketName: bucket.Name})
|
|
meta, err := loadBucketMetadata(ctx, objAPI, bucket.Name)
|
|
if err != nil {
|
|
if err != errMetaDataConverted {
|
|
return err
|
|
}
|
|
|
|
meta.Created = bucket.Created
|
|
logger.LogIf(ctx, meta.save(ctx, objAPI))
|
|
}
|
|
if !meta.LockEnabled {
|
|
continue
|
|
}
|
|
|
|
configFile := path.Join(bucketConfigPrefix, bucket.Name, objectLockConfig)
|
|
configData, err := readConfig(ctx, objAPI, configFile)
|
|
if err != nil {
|
|
if errors.Is(err, errConfigNotFound) {
|
|
globalBucketObjectLockSys.Set(bucket.Name, &objectlock.Retention{})
|
|
continue
|
|
}
|
|
return err
|
|
}
|
|
|
|
config, err := objectlock.ParseObjectLockConfig(bytes.NewReader(configData))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
retention := &objectlock.Retention{}
|
|
if config.Rule != nil {
|
|
retention = config.ToRetention()
|
|
}
|
|
globalBucketObjectLockSys.Set(bucket.Name, retention)
|
|
}
|
|
return nil
|
|
}
|