mirror of
https://github.com/chrislusf/seaweedfs
synced 2025-07-24 20:42:47 +02:00
675 lines
26 KiB
Go
675 lines
26 KiB
Go
package s3api
|
|
|
|
import (
|
|
"encoding/xml"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/seaweedfs/seaweedfs/weed/glog"
|
|
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/seaweedfs/seaweedfs/weed/s3api/s3_constants"
|
|
"github.com/seaweedfs/seaweedfs/weed/s3api/s3err"
|
|
)
|
|
|
|
// ====================================================================
|
|
// ERROR DEFINITIONS
|
|
// ====================================================================
|
|
|
|
// Sentinel errors for proper error handling instead of string matching
|
|
var (
|
|
ErrNoRetentionConfiguration = errors.New("no retention configuration found")
|
|
ErrNoLegalHoldConfiguration = errors.New("no legal hold configuration found")
|
|
ErrBucketNotFound = errors.New("bucket not found")
|
|
ErrObjectNotFound = errors.New("object not found")
|
|
ErrVersionNotFound = errors.New("version not found")
|
|
ErrLatestVersionNotFound = errors.New("latest version not found")
|
|
ErrComplianceModeActive = errors.New("object is under COMPLIANCE mode retention and cannot be deleted or modified")
|
|
ErrGovernanceModeActive = errors.New("object is under GOVERNANCE mode retention and cannot be deleted or modified without bypass")
|
|
)
|
|
|
|
// Error definitions for Object Lock
|
|
var (
|
|
ErrObjectUnderLegalHold = errors.New("object is under legal hold and cannot be deleted or modified")
|
|
ErrGovernanceBypassNotPermitted = errors.New("user does not have permission to bypass governance retention")
|
|
ErrInvalidRetentionPeriod = errors.New("invalid retention period specified")
|
|
ErrBothDaysAndYearsSpecified = errors.New("both days and years cannot be specified in the same retention configuration")
|
|
ErrMalformedXML = errors.New("malformed XML in request body")
|
|
|
|
// Validation error constants with specific messages for tests
|
|
ErrRetentionMissingMode = errors.New("retention configuration must specify Mode")
|
|
ErrRetentionMissingRetainUntilDate = errors.New("retention configuration must specify RetainUntilDate")
|
|
ErrInvalidRetentionModeValue = errors.New("invalid retention mode")
|
|
)
|
|
|
|
const (
|
|
// Maximum retention period limits according to AWS S3 specifications
|
|
MaxRetentionDays = 36500 // Maximum number of days for object retention (100 years)
|
|
MaxRetentionYears = 100 // Maximum number of years for object retention
|
|
)
|
|
|
|
// ====================================================================
|
|
// DATA STRUCTURES
|
|
// ====================================================================
|
|
|
|
// ObjectRetention represents S3 Object Retention configuration
|
|
type ObjectRetention struct {
|
|
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Retention"`
|
|
Mode string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Mode,omitempty"`
|
|
RetainUntilDate *time.Time `xml:"http://s3.amazonaws.com/doc/2006-03-01/ RetainUntilDate,omitempty"`
|
|
}
|
|
|
|
// ObjectLegalHold represents S3 Object Legal Hold configuration
|
|
type ObjectLegalHold struct {
|
|
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ LegalHold"`
|
|
Status string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Status,omitempty"`
|
|
}
|
|
|
|
// ObjectLockConfiguration represents S3 Object Lock Configuration
|
|
type ObjectLockConfiguration struct {
|
|
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ObjectLockConfiguration"`
|
|
ObjectLockEnabled string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ObjectLockEnabled,omitempty"`
|
|
Rule *ObjectLockRule `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Rule,omitempty"`
|
|
}
|
|
|
|
// ObjectLockRule represents an Object Lock Rule
|
|
type ObjectLockRule struct {
|
|
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Rule"`
|
|
DefaultRetention *DefaultRetention `xml:"http://s3.amazonaws.com/doc/2006-03-01/ DefaultRetention,omitempty"`
|
|
}
|
|
|
|
// DefaultRetention represents default retention settings
|
|
// Implements custom XML unmarshal to track if Days/Years were present in XML
|
|
type DefaultRetention struct {
|
|
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ DefaultRetention"`
|
|
Mode string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Mode,omitempty"`
|
|
Days int `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Days,omitempty"`
|
|
Years int `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Years,omitempty"`
|
|
DaysSet bool `xml:"-"`
|
|
YearsSet bool `xml:"-"`
|
|
}
|
|
|
|
// ====================================================================
|
|
// XML PARSING
|
|
// ====================================================================
|
|
|
|
// UnmarshalXML implements custom XML unmarshaling for DefaultRetention
|
|
// to track whether Days/Years fields were explicitly present in the XML
|
|
func (dr *DefaultRetention) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
|
|
type Alias DefaultRetention
|
|
aux := &struct {
|
|
*Alias
|
|
Days *int `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Days,omitempty"`
|
|
Years *int `xml:"http://s3.amazonaws.com/doc/2006-03-01/ Years,omitempty"`
|
|
}{Alias: (*Alias)(dr)}
|
|
if err := d.DecodeElement(aux, &start); err != nil {
|
|
glog.V(2).Infof("DefaultRetention.UnmarshalXML: decode error: %v", err)
|
|
return err
|
|
}
|
|
if aux.Days != nil {
|
|
dr.Days = *aux.Days
|
|
dr.DaysSet = true
|
|
glog.V(4).Infof("DefaultRetention.UnmarshalXML: Days present, value=%d", dr.Days)
|
|
} else {
|
|
glog.V(4).Infof("DefaultRetention.UnmarshalXML: Days not present")
|
|
}
|
|
if aux.Years != nil {
|
|
dr.Years = *aux.Years
|
|
dr.YearsSet = true
|
|
glog.V(4).Infof("DefaultRetention.UnmarshalXML: Years present, value=%d", dr.Years)
|
|
} else {
|
|
glog.V(4).Infof("DefaultRetention.UnmarshalXML: Years not present")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// parseXML is a generic helper function to parse XML from an HTTP request body.
|
|
// It uses xml.Decoder for streaming XML parsing, which is more memory-efficient
|
|
// and avoids loading the entire request body into memory.
|
|
//
|
|
// The function assumes:
|
|
// - The request body is not nil (returns error if it is)
|
|
// - The request body will be closed after parsing (deferred close)
|
|
// - The XML content matches the structure of the provided result type T
|
|
//
|
|
// This approach is optimized for small XML payloads typical in S3 API requests
|
|
// (retention configurations, legal hold settings, etc.) where the overhead of
|
|
// streaming parsing is acceptable for the memory efficiency benefits.
|
|
func parseXML[T any](request *http.Request, result *T) error {
|
|
if request.Body == nil {
|
|
return fmt.Errorf("error parsing XML: empty request body")
|
|
}
|
|
defer request.Body.Close()
|
|
|
|
decoder := xml.NewDecoder(request.Body)
|
|
if err := decoder.Decode(result); err != nil {
|
|
return fmt.Errorf("error parsing XML: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// parseObjectRetention parses XML retention configuration from request body
|
|
func parseObjectRetention(request *http.Request) (*ObjectRetention, error) {
|
|
var retention ObjectRetention
|
|
if err := parseXML(request, &retention); err != nil {
|
|
return nil, err
|
|
}
|
|
return &retention, nil
|
|
}
|
|
|
|
// parseObjectLegalHold parses XML legal hold configuration from request body
|
|
func parseObjectLegalHold(request *http.Request) (*ObjectLegalHold, error) {
|
|
var legalHold ObjectLegalHold
|
|
if err := parseXML(request, &legalHold); err != nil {
|
|
return nil, err
|
|
}
|
|
return &legalHold, nil
|
|
}
|
|
|
|
// parseObjectLockConfiguration parses XML object lock configuration from request body
|
|
func parseObjectLockConfiguration(request *http.Request) (*ObjectLockConfiguration, error) {
|
|
var config ObjectLockConfiguration
|
|
if err := parseXML(request, &config); err != nil {
|
|
return nil, err
|
|
}
|
|
return &config, nil
|
|
}
|
|
|
|
// ====================================================================
|
|
// OBJECT ENTRY OPERATIONS
|
|
// ====================================================================
|
|
|
|
// getObjectEntry retrieves the appropriate object entry based on versioning and versionId
|
|
func (s3a *S3ApiServer) getObjectEntry(bucket, object, versionId string) (*filer_pb.Entry, error) {
|
|
var entry *filer_pb.Entry
|
|
var err error
|
|
|
|
if versionId != "" {
|
|
entry, err = s3a.getSpecificObjectVersion(bucket, object, versionId)
|
|
} else {
|
|
// Check if versioning is enabled
|
|
versioningEnabled, vErr := s3a.isVersioningEnabled(bucket)
|
|
if vErr != nil {
|
|
return nil, fmt.Errorf("error checking versioning: %w", vErr)
|
|
}
|
|
|
|
if versioningEnabled {
|
|
entry, err = s3a.getLatestObjectVersion(bucket, object)
|
|
} else {
|
|
bucketDir := s3a.option.BucketsPath + "/" + bucket
|
|
entry, err = s3a.getEntry(bucketDir, object)
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to retrieve object %s/%s: %w", bucket, object, ErrObjectNotFound)
|
|
}
|
|
|
|
return entry, nil
|
|
}
|
|
|
|
// ====================================================================
|
|
// RETENTION OPERATIONS
|
|
// ====================================================================
|
|
|
|
// getObjectRetention retrieves object retention configuration
|
|
func (s3a *S3ApiServer) getObjectRetention(bucket, object, versionId string) (*ObjectRetention, error) {
|
|
entry, err := s3a.getObjectEntry(bucket, object, versionId)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if entry.Extended == nil {
|
|
return nil, ErrNoRetentionConfiguration
|
|
}
|
|
|
|
retention := &ObjectRetention{}
|
|
|
|
if modeBytes, exists := entry.Extended[s3_constants.ExtObjectLockModeKey]; exists {
|
|
retention.Mode = string(modeBytes)
|
|
}
|
|
|
|
if dateBytes, exists := entry.Extended[s3_constants.ExtRetentionUntilDateKey]; exists {
|
|
if timestamp, err := strconv.ParseInt(string(dateBytes), 10, 64); err == nil {
|
|
t := time.Unix(timestamp, 0)
|
|
retention.RetainUntilDate = &t
|
|
} else {
|
|
return nil, fmt.Errorf("failed to parse retention timestamp for %s/%s: corrupted timestamp data", bucket, object)
|
|
}
|
|
}
|
|
|
|
if retention.Mode == "" || retention.RetainUntilDate == nil {
|
|
return nil, ErrNoRetentionConfiguration
|
|
}
|
|
|
|
return retention, nil
|
|
}
|
|
|
|
// setObjectRetention sets object retention configuration
|
|
func (s3a *S3ApiServer) setObjectRetention(bucket, object, versionId string, retention *ObjectRetention, bypassGovernance bool) error {
|
|
var entry *filer_pb.Entry
|
|
var err error
|
|
var entryPath string
|
|
|
|
if versionId != "" {
|
|
entry, err = s3a.getSpecificObjectVersion(bucket, object, versionId)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get version %s for object %s/%s: %w", versionId, bucket, object, ErrVersionNotFound)
|
|
}
|
|
entryPath = object + ".versions/" + s3a.getVersionFileName(versionId)
|
|
} else {
|
|
// Check if versioning is enabled
|
|
versioningEnabled, vErr := s3a.isVersioningEnabled(bucket)
|
|
if vErr != nil {
|
|
return fmt.Errorf("error checking versioning: %w", vErr)
|
|
}
|
|
|
|
if versioningEnabled {
|
|
entry, err = s3a.getLatestObjectVersion(bucket, object)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get latest version for object %s/%s: %w", bucket, object, ErrLatestVersionNotFound)
|
|
}
|
|
// Extract version ID from entry metadata
|
|
if entry.Extended != nil {
|
|
if versionIdBytes, exists := entry.Extended[s3_constants.ExtVersionIdKey]; exists {
|
|
versionId = string(versionIdBytes)
|
|
entryPath = object + ".versions/" + s3a.getVersionFileName(versionId)
|
|
}
|
|
}
|
|
} else {
|
|
bucketDir := s3a.option.BucketsPath + "/" + bucket
|
|
entry, err = s3a.getEntry(bucketDir, object)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get object %s/%s: %w", bucket, object, ErrObjectNotFound)
|
|
}
|
|
entryPath = object
|
|
}
|
|
}
|
|
|
|
// Check if object is already under retention
|
|
if entry.Extended != nil {
|
|
if existingMode, exists := entry.Extended[s3_constants.ExtObjectLockModeKey]; exists {
|
|
// Check if attempting to change retention mode
|
|
if retention.Mode != "" && string(existingMode) != retention.Mode {
|
|
// Attempting to change retention mode
|
|
if string(existingMode) == s3_constants.RetentionModeCompliance {
|
|
// Cannot change compliance mode retention without bypass
|
|
return ErrComplianceModeActive
|
|
}
|
|
|
|
if string(existingMode) == s3_constants.RetentionModeGovernance && !bypassGovernance {
|
|
// Cannot change governance mode retention without bypass
|
|
return ErrGovernanceModeActive
|
|
}
|
|
}
|
|
|
|
if existingDateBytes, dateExists := entry.Extended[s3_constants.ExtRetentionUntilDateKey]; dateExists {
|
|
if timestamp, err := strconv.ParseInt(string(existingDateBytes), 10, 64); err == nil {
|
|
existingDate := time.Unix(timestamp, 0)
|
|
|
|
// Check if the new retention date is earlier than the existing one
|
|
if retention.RetainUntilDate != nil && retention.RetainUntilDate.Before(existingDate) {
|
|
// Attempting to decrease retention period
|
|
if string(existingMode) == s3_constants.RetentionModeCompliance {
|
|
// Cannot decrease compliance mode retention without bypass
|
|
return ErrComplianceModeActive
|
|
}
|
|
|
|
if string(existingMode) == s3_constants.RetentionModeGovernance && !bypassGovernance {
|
|
// Cannot decrease governance mode retention without bypass
|
|
return ErrGovernanceModeActive
|
|
}
|
|
}
|
|
|
|
// If new retention date is later or same, allow the operation
|
|
// This covers both increasing retention period and overriding with same/later date
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Update retention metadata
|
|
if entry.Extended == nil {
|
|
entry.Extended = make(map[string][]byte)
|
|
}
|
|
|
|
if retention.Mode != "" {
|
|
entry.Extended[s3_constants.ExtObjectLockModeKey] = []byte(retention.Mode)
|
|
}
|
|
|
|
if retention.RetainUntilDate != nil {
|
|
entry.Extended[s3_constants.ExtRetentionUntilDateKey] = []byte(strconv.FormatInt(retention.RetainUntilDate.Unix(), 10))
|
|
|
|
// Also update the existing WORM fields for compatibility
|
|
entry.WormEnforcedAtTsNs = time.Now().UnixNano()
|
|
}
|
|
|
|
// Update the entry
|
|
// NOTE: Potential race condition exists if concurrent calls to PutObjectRetention
|
|
// and PutObjectLegalHold update the same object simultaneously, as they might
|
|
// overwrite each other's Extended map changes. This is mitigated by the fact
|
|
// that mkFile operations are typically serialized at the filer level, but
|
|
// future implementations might consider using atomic update operations or
|
|
// entry-level locking for complete safety.
|
|
bucketDir := s3a.option.BucketsPath + "/" + bucket
|
|
return s3a.mkFile(bucketDir, entryPath, entry.Chunks, func(updatedEntry *filer_pb.Entry) {
|
|
updatedEntry.Extended = entry.Extended
|
|
updatedEntry.WormEnforcedAtTsNs = entry.WormEnforcedAtTsNs
|
|
})
|
|
}
|
|
|
|
// ====================================================================
|
|
// LEGAL HOLD OPERATIONS
|
|
// ====================================================================
|
|
|
|
// getObjectLegalHold retrieves object legal hold configuration
|
|
func (s3a *S3ApiServer) getObjectLegalHold(bucket, object, versionId string) (*ObjectLegalHold, error) {
|
|
entry, err := s3a.getObjectEntry(bucket, object, versionId)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if entry.Extended == nil {
|
|
return nil, ErrNoLegalHoldConfiguration
|
|
}
|
|
|
|
legalHold := &ObjectLegalHold{}
|
|
|
|
if statusBytes, exists := entry.Extended[s3_constants.ExtLegalHoldKey]; exists {
|
|
legalHold.Status = string(statusBytes)
|
|
} else {
|
|
return nil, ErrNoLegalHoldConfiguration
|
|
}
|
|
|
|
return legalHold, nil
|
|
}
|
|
|
|
// setObjectLegalHold sets object legal hold configuration
|
|
func (s3a *S3ApiServer) setObjectLegalHold(bucket, object, versionId string, legalHold *ObjectLegalHold) error {
|
|
var entry *filer_pb.Entry
|
|
var err error
|
|
var entryPath string
|
|
|
|
if versionId != "" {
|
|
entry, err = s3a.getSpecificObjectVersion(bucket, object, versionId)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get version %s for object %s/%s: %w", versionId, bucket, object, ErrVersionNotFound)
|
|
}
|
|
entryPath = object + ".versions/" + s3a.getVersionFileName(versionId)
|
|
} else {
|
|
// Check if versioning is enabled
|
|
versioningEnabled, vErr := s3a.isVersioningEnabled(bucket)
|
|
if vErr != nil {
|
|
return fmt.Errorf("error checking versioning: %w", vErr)
|
|
}
|
|
|
|
if versioningEnabled {
|
|
entry, err = s3a.getLatestObjectVersion(bucket, object)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get latest version for object %s/%s: %w", bucket, object, ErrLatestVersionNotFound)
|
|
}
|
|
// Extract version ID from entry metadata
|
|
if entry.Extended != nil {
|
|
if versionIdBytes, exists := entry.Extended[s3_constants.ExtVersionIdKey]; exists {
|
|
versionId = string(versionIdBytes)
|
|
entryPath = object + ".versions/" + s3a.getVersionFileName(versionId)
|
|
}
|
|
}
|
|
} else {
|
|
bucketDir := s3a.option.BucketsPath + "/" + bucket
|
|
entry, err = s3a.getEntry(bucketDir, object)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to get object %s/%s: %w", bucket, object, ErrObjectNotFound)
|
|
}
|
|
entryPath = object
|
|
}
|
|
}
|
|
|
|
// Update legal hold metadata
|
|
if entry.Extended == nil {
|
|
entry.Extended = make(map[string][]byte)
|
|
}
|
|
|
|
entry.Extended[s3_constants.ExtLegalHoldKey] = []byte(legalHold.Status)
|
|
|
|
// Update the entry
|
|
// NOTE: Potential race condition exists if concurrent calls to PutObjectRetention
|
|
// and PutObjectLegalHold update the same object simultaneously, as they might
|
|
// overwrite each other's Extended map changes. This is mitigated by the fact
|
|
// that mkFile operations are typically serialized at the filer level, but
|
|
// future implementations might consider using atomic update operations or
|
|
// entry-level locking for complete safety.
|
|
bucketDir := s3a.option.BucketsPath + "/" + bucket
|
|
return s3a.mkFile(bucketDir, entryPath, entry.Chunks, func(updatedEntry *filer_pb.Entry) {
|
|
updatedEntry.Extended = entry.Extended
|
|
})
|
|
}
|
|
|
|
// ====================================================================
|
|
// PROTECTION ENFORCEMENT
|
|
// ====================================================================
|
|
|
|
// isObjectRetentionActive checks if object has active retention
|
|
func (s3a *S3ApiServer) isObjectRetentionActive(bucket, object, versionId string) (bool, error) {
|
|
retention, err := s3a.getObjectRetention(bucket, object, versionId)
|
|
if err != nil {
|
|
// If no retention found, object is not under retention
|
|
if errors.Is(err, ErrNoRetentionConfiguration) {
|
|
return false, nil
|
|
}
|
|
return false, err
|
|
}
|
|
|
|
if retention.RetainUntilDate != nil && retention.RetainUntilDate.After(time.Now()) {
|
|
return true, nil
|
|
}
|
|
|
|
return false, nil
|
|
}
|
|
|
|
// getRetentionFromEntry extracts retention configuration from filer entry
|
|
func (s3a *S3ApiServer) getRetentionFromEntry(entry *filer_pb.Entry) (*ObjectRetention, bool, error) {
|
|
if entry.Extended == nil {
|
|
return nil, false, nil
|
|
}
|
|
|
|
retention := &ObjectRetention{}
|
|
|
|
if modeBytes, exists := entry.Extended[s3_constants.ExtObjectLockModeKey]; exists {
|
|
retention.Mode = string(modeBytes)
|
|
}
|
|
|
|
if dateBytes, exists := entry.Extended[s3_constants.ExtRetentionUntilDateKey]; exists {
|
|
if timestamp, err := strconv.ParseInt(string(dateBytes), 10, 64); err == nil {
|
|
t := time.Unix(timestamp, 0)
|
|
retention.RetainUntilDate = &t
|
|
} else {
|
|
return nil, false, fmt.Errorf("failed to parse retention timestamp: corrupted timestamp data")
|
|
}
|
|
}
|
|
|
|
if retention.Mode == "" || retention.RetainUntilDate == nil {
|
|
return nil, false, nil
|
|
}
|
|
|
|
// Check if retention is currently active
|
|
isActive := retention.RetainUntilDate.After(time.Now())
|
|
return retention, isActive, nil
|
|
}
|
|
|
|
// getLegalHoldFromEntry extracts legal hold configuration from filer entry
|
|
func (s3a *S3ApiServer) getLegalHoldFromEntry(entry *filer_pb.Entry) (*ObjectLegalHold, bool, error) {
|
|
if entry.Extended == nil {
|
|
return nil, false, nil
|
|
}
|
|
|
|
legalHold := &ObjectLegalHold{}
|
|
|
|
if statusBytes, exists := entry.Extended[s3_constants.ExtLegalHoldKey]; exists {
|
|
legalHold.Status = string(statusBytes)
|
|
} else {
|
|
return nil, false, nil
|
|
}
|
|
|
|
isActive := legalHold.Status == s3_constants.LegalHoldOn
|
|
return legalHold, isActive, nil
|
|
}
|
|
|
|
// ====================================================================
|
|
// GOVERNANCE BYPASS
|
|
// ====================================================================
|
|
|
|
// checkGovernanceBypassPermission checks if user has permission to bypass governance retention
|
|
func (s3a *S3ApiServer) checkGovernanceBypassPermission(request *http.Request, bucket, object string) bool {
|
|
// Use the existing IAM auth system to check the specific permission
|
|
// Create the governance bypass action with proper bucket/object concatenation
|
|
// Note: path.Join would drop bucket if object has leading slash, so use explicit formatting
|
|
resource := fmt.Sprintf("%s/%s", bucket, strings.TrimPrefix(object, "/"))
|
|
action := Action(fmt.Sprintf("%s:%s", s3_constants.ACTION_BYPASS_GOVERNANCE_RETENTION, resource))
|
|
|
|
// Use the IAM system to authenticate and authorize this specific action
|
|
identity, errCode := s3a.iam.authRequest(request, action)
|
|
if errCode != s3err.ErrNone {
|
|
glog.V(3).Infof("IAM auth failed for governance bypass: %v", errCode)
|
|
return false
|
|
}
|
|
|
|
// Verify that the authenticated identity can perform this action
|
|
if identity != nil && identity.canDo(action, bucket, object) {
|
|
return true
|
|
}
|
|
|
|
// Additional check: allow users with Admin action to bypass governance retention
|
|
// Use the proper S3 Admin action constant instead of generic isAdmin() method
|
|
adminAction := Action(fmt.Sprintf("%s:%s", s3_constants.ACTION_ADMIN, resource))
|
|
if identity != nil && identity.canDo(adminAction, bucket, object) {
|
|
glog.V(2).Infof("Admin user %s granted governance bypass permission for %s/%s", identity.Name, bucket, object)
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// evaluateGovernanceBypassRequest evaluates if governance bypass is requested and permitted
|
|
func (s3a *S3ApiServer) evaluateGovernanceBypassRequest(r *http.Request, bucket, object string) bool {
|
|
// Step 1: Check if governance bypass was requested via header
|
|
bypassRequested := r.Header.Get("x-amz-bypass-governance-retention") == "true"
|
|
if !bypassRequested {
|
|
// No bypass requested - normal retention enforcement applies
|
|
return false
|
|
}
|
|
|
|
// Step 2: Validate user has permission to bypass governance retention
|
|
hasPermission := s3a.checkGovernanceBypassPermission(r, bucket, object)
|
|
if !hasPermission {
|
|
glog.V(2).Infof("Governance bypass denied for %s/%s: user lacks s3:BypassGovernanceRetention permission", bucket, object)
|
|
return false
|
|
}
|
|
|
|
glog.V(2).Infof("Governance bypass granted for %s/%s: header present and user has permission", bucket, object)
|
|
return true
|
|
}
|
|
|
|
// enforceObjectLockProtections enforces object lock protections for operations
|
|
func (s3a *S3ApiServer) enforceObjectLockProtections(request *http.Request, bucket, object, versionId string, governanceBypassAllowed bool) error {
|
|
// Get the object entry to check both retention and legal hold
|
|
// For delete operations without versionId, we need to check the latest version
|
|
var entry *filer_pb.Entry
|
|
var err error
|
|
|
|
if versionId != "" {
|
|
// Check specific version
|
|
entry, err = s3a.getObjectEntry(bucket, object, versionId)
|
|
} else {
|
|
// Check latest version for delete marker creation
|
|
entry, err = s3a.getObjectEntry(bucket, object, "")
|
|
}
|
|
|
|
if err != nil {
|
|
// If object doesn't exist, it's not under retention or legal hold - this is expected during delete operations
|
|
if errors.Is(err, ErrObjectNotFound) || errors.Is(err, ErrVersionNotFound) || errors.Is(err, ErrLatestVersionNotFound) {
|
|
// Object doesn't exist, so it can't be under retention or legal hold - this is normal
|
|
glog.V(4).Infof("Object %s/%s (versionId: %s) not found during object lock check (expected during delete operations)", bucket, object, versionId)
|
|
return nil
|
|
}
|
|
glog.Warningf("Error retrieving object %s/%s (versionId: %s) for lock check: %v", bucket, object, versionId, err)
|
|
return err
|
|
}
|
|
|
|
// Extract retention information from the entry
|
|
retention, retentionActive, err := s3a.getRetentionFromEntry(entry)
|
|
if err != nil {
|
|
glog.Warningf("Error parsing retention for %s/%s (versionId: %s): %v", bucket, object, versionId, err)
|
|
// Continue with legal hold check even if retention parsing fails
|
|
}
|
|
|
|
// Extract legal hold information from the entry
|
|
_, legalHoldActive, err := s3a.getLegalHoldFromEntry(entry)
|
|
if err != nil {
|
|
glog.Warningf("Error parsing legal hold for %s/%s (versionId: %s): %v", bucket, object, versionId, err)
|
|
// Continue with retention check even if legal hold parsing fails
|
|
}
|
|
|
|
// If object is under legal hold, it cannot be deleted or modified (including delete marker creation)
|
|
if legalHoldActive {
|
|
return ErrObjectUnderLegalHold
|
|
}
|
|
|
|
// If object is under retention, check the mode
|
|
if retentionActive && retention != nil {
|
|
if retention.Mode == s3_constants.RetentionModeCompliance {
|
|
return ErrComplianceModeActive
|
|
}
|
|
|
|
if retention.Mode == s3_constants.RetentionModeGovernance {
|
|
if !governanceBypassAllowed {
|
|
return ErrGovernanceModeActive
|
|
}
|
|
// Note: governanceBypassAllowed parameter is already validated by evaluateGovernanceBypassRequest()
|
|
// which checks both header presence and IAM permissions, so we trust it here
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ====================================================================
|
|
// AVAILABILITY CHECKS
|
|
// ====================================================================
|
|
|
|
// isObjectLockAvailable checks if object lock is available for the bucket
|
|
func (s3a *S3ApiServer) isObjectLockAvailable(bucket string) error {
|
|
versioningEnabled, err := s3a.isVersioningEnabled(bucket)
|
|
if err != nil {
|
|
if errors.Is(err, filer_pb.ErrNotFound) {
|
|
return ErrBucketNotFound
|
|
}
|
|
return fmt.Errorf("error checking versioning status: %w", err)
|
|
}
|
|
|
|
if !versioningEnabled {
|
|
return fmt.Errorf("object lock requires versioning to be enabled")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// handleObjectLockAvailabilityCheck handles object lock availability checks for API endpoints
|
|
func (s3a *S3ApiServer) handleObjectLockAvailabilityCheck(w http.ResponseWriter, request *http.Request, bucket, handlerName string) bool {
|
|
if err := s3a.isObjectLockAvailable(bucket); err != nil {
|
|
glog.Errorf("%s: object lock not available for bucket %s: %v", handlerName, bucket, err)
|
|
if errors.Is(err, ErrBucketNotFound) {
|
|
s3err.WriteErrorResponse(w, request, s3err.ErrNoSuchBucket)
|
|
} else {
|
|
// Return InvalidRequest for object lock operations on buckets without object lock enabled
|
|
// This matches AWS S3 behavior and s3-tests expectations (400 Bad Request)
|
|
s3err.WriteErrorResponse(w, request, s3err.ErrInvalidRequest)
|
|
}
|
|
return false
|
|
}
|
|
return true
|
|
}
|