forked from TrueCloudLab/frostfs-node
[#32] Make basic ACL check in all object request
Signed-off-by: Alex Vanin <alexey@nspcc.ru>support/v0.27
parent
49ee9a14a1
commit
91fef72bb6
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@ -1,6 +1,7 @@
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package acl
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import (
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"bytes"
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"context"
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acl "github.com/nspcc-dev/neofs-api-go/pkg/acl/eacl"
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@ -25,7 +26,8 @@ type (
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}
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getStreamBasicChecker struct {
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object.GetObjectStreamer
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next object.GetObjectStreamer
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info requestInfo
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}
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searchStreamBasicChecker struct {
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@ -40,6 +42,7 @@ type (
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basicACL uint32
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requestRole acl.Role
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operation acl.Operation // put, get, head, etc.
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owner *refs.OwnerID // container owner
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}
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)
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@ -47,7 +50,7 @@ var (
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ErrMalformedRequest = errors.New("malformed request")
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ErrUnknownRole = errors.New("can't classify request sender")
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ErrUnknownContainer = errors.New("can't fetch container info")
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ErrBasicAccessDenied = errors.New("access denied by basic ACL")
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ErrBasicAccessDenied = errors.New("access denied by basic acl")
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)
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// NewBasicChecker is a constructor for basic ACL checker of object requests.
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@ -82,7 +85,11 @@ func (b BasicChecker) Get(
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}
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stream, err := b.next.Get(ctx, request)
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return getStreamBasicChecker{stream}, err
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return getStreamBasicChecker{
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next: stream,
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info: reqInfo,
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}, err
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}
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func (b BasicChecker) Put(ctx context.Context) (object.PutObjectStreamer, error) {
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@ -216,12 +223,17 @@ func (p putStreamBasicChecker) Send(request *object.PutRequest) error {
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return err
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}
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owner, err := getObjectOwnerFromMessage(request)
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if err != nil {
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return err
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}
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reqInfo, err := p.source.findRequestInfo(request, cid, acl.OperationPut)
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if err != nil {
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return err
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}
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if !basicACLCheck(reqInfo) {
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if !basicACLCheck(reqInfo) || !stickyBitCheck(reqInfo, owner) {
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return ErrBasicAccessDenied
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}
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}
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@ -233,6 +245,32 @@ func (p putStreamBasicChecker) CloseAndRecv() (*object.PutResponse, error) {
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return p.next.CloseAndRecv()
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}
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func (g getStreamBasicChecker) Recv() (*object.GetResponse, error) {
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resp, err := g.next.Recv()
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if err != nil {
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return resp, err
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}
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body := resp.GetBody()
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if body == nil {
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return resp, err
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}
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part := body.GetObjectPart()
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if _, ok := part.(*object.GetObjectPartInit); ok {
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owner, err := getObjectOwnerFromMessage(resp)
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if err != nil {
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return nil, err
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}
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if !stickyBitCheck(g.info, owner) {
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return nil, ErrBasicAccessDenied
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}
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}
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return resp, err
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}
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func (b BasicChecker) findRequestInfo(
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req RequestV2,
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cid *refs.ContainerID,
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@ -257,6 +295,7 @@ func (b BasicChecker) findRequestInfo(
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info.basicACL = cnr.GetBasicACL()
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info.requestRole = role
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info.operation = op
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info.owner = cnr.GetOwnerID()
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return info, nil
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}
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@ -294,6 +333,66 @@ func getContainerIDFromRequest(req interface{}) (id *refs.ContainerID, err error
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}
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}
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func basicACLCheck(info requestInfo) bool {
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panic("implement me")
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func getObjectOwnerFromMessage(req interface{}) (id *refs.OwnerID, err error) {
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defer func() {
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// if there is a NPE on get body and get address
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if r := recover(); r != nil {
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err = ErrMalformedRequest
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}
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}()
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switch v := req.(type) {
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case *object.PutRequest:
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objPart := v.GetBody().GetObjectPart()
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if part, ok := objPart.(*object.PutObjectPartInit); ok {
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return part.GetHeader().GetOwnerID(), nil
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} else {
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return nil, errors.New("can't get cid in chunk")
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}
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case *object.GetResponse:
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objPart := v.GetBody().GetObjectPart()
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if part, ok := objPart.(*object.GetObjectPartInit); ok {
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return part.GetHeader().GetOwnerID(), nil
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} else {
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return nil, errors.New("can't get cid in chunk")
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}
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default:
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return nil, errors.New("unsupported request type")
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}
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}
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// main check function for basic ACL
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func basicACLCheck(info requestInfo) bool {
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rule := basicACLHelper(info.basicACL)
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// check basic ACL permissions
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var checkFn func(acl.Operation) bool
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switch info.requestRole {
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case acl.RoleUser:
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checkFn = rule.UserAllowed
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case acl.RoleSystem:
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checkFn = rule.SystemAllowed
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case acl.RoleOthers:
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checkFn = rule.OthersAllowed
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default:
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// log there
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return false
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}
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return checkFn(info.operation)
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}
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func stickyBitCheck(info requestInfo, owner *refs.OwnerID) bool {
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if owner == nil || info.owner == nil {
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return false
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}
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rule := basicACLHelper(info.basicACL)
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if !rule.Sticky() {
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return true
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}
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return bytes.Equal(owner.GetValue(), info.owner.GetValue())
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}
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