v2/signature: Unify request and response signing
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich
Stanislav Bogatyrev
parent
82110751e7
commit
db97b782c0
1 changed files with 210 additions and 52 deletions
|
|
@ -10,12 +10,18 @@ import (
|
|||
"github.com/pkg/errors"
|
||||
)
|
||||
|
||||
type SignedRequest interface {
|
||||
type serviceRequest interface {
|
||||
GetMetaHeader() *service.RequestMetaHeader
|
||||
GetVerificationHeader() *service.RequestVerificationHeader
|
||||
SetVerificationHeader(*service.RequestVerificationHeader)
|
||||
}
|
||||
|
||||
type serviceResponse interface {
|
||||
GetMetaHeader() *service.ResponseMetaHeader
|
||||
GetVerificationHeader() *service.ResponseVerificationHeader
|
||||
SetVerificationHeader(*service.ResponseVerificationHeader)
|
||||
}
|
||||
|
||||
type stableMarshaler interface {
|
||||
StableMarshal([]byte) ([]byte, error)
|
||||
StableSize() int
|
||||
|
|
@ -25,12 +31,99 @@ type stableMarshalerWrapper struct {
|
|||
sm stableMarshaler
|
||||
}
|
||||
|
||||
type metaHeader interface {
|
||||
stableMarshaler
|
||||
getOrigin() metaHeader
|
||||
}
|
||||
|
||||
type verificationHeader interface {
|
||||
stableMarshaler
|
||||
|
||||
GetBodySignature() *service.Signature
|
||||
SetBodySignature(*service.Signature)
|
||||
GetMetaSignature() *service.Signature
|
||||
SetMetaSignature(*service.Signature)
|
||||
GetOriginSignature() *service.Signature
|
||||
SetOriginSignature(*service.Signature)
|
||||
|
||||
setOrigin(stableMarshaler)
|
||||
getOrigin() verificationHeader
|
||||
}
|
||||
|
||||
type requestMetaHeader struct {
|
||||
*service.RequestMetaHeader
|
||||
}
|
||||
|
||||
type responseMetaHeader struct {
|
||||
*service.ResponseMetaHeader
|
||||
}
|
||||
|
||||
type requestVerificationHeader struct {
|
||||
*service.RequestVerificationHeader
|
||||
}
|
||||
|
||||
type responseVerificationHeader struct {
|
||||
*service.ResponseVerificationHeader
|
||||
}
|
||||
|
||||
func (h *requestMetaHeader) getOrigin() metaHeader {
|
||||
return &requestMetaHeader{
|
||||
RequestMetaHeader: h.GetOrigin(),
|
||||
}
|
||||
}
|
||||
|
||||
func (h *responseMetaHeader) getOrigin() metaHeader {
|
||||
return &responseMetaHeader{
|
||||
ResponseMetaHeader: h.GetOrigin(),
|
||||
}
|
||||
}
|
||||
|
||||
func (h *requestVerificationHeader) getOrigin() verificationHeader {
|
||||
if origin := h.GetOrigin(); origin != nil {
|
||||
return &requestVerificationHeader{
|
||||
RequestVerificationHeader: origin,
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (h *requestVerificationHeader) setOrigin(m stableMarshaler) {
|
||||
if m != nil {
|
||||
h.SetOrigin(m.(*service.RequestVerificationHeader))
|
||||
}
|
||||
}
|
||||
|
||||
func (r *responseVerificationHeader) getOrigin() verificationHeader {
|
||||
if origin := r.GetOrigin(); origin != nil {
|
||||
return &responseVerificationHeader{
|
||||
ResponseVerificationHeader: origin,
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (r *responseVerificationHeader) setOrigin(m stableMarshaler) {
|
||||
if m != nil {
|
||||
r.SetOrigin(m.(*service.ResponseVerificationHeader))
|
||||
}
|
||||
}
|
||||
|
||||
func (s stableMarshalerWrapper) ReadSignedData(buf []byte) ([]byte, error) {
|
||||
if s.sm != nil {
|
||||
return s.sm.StableMarshal(buf)
|
||||
}
|
||||
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
func (s stableMarshalerWrapper) SignedDataSize() int {
|
||||
if s.sm != nil {
|
||||
return s.sm.StableSize()
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func keySignatureHandler(s *service.Signature) signature.KeySignatureHandler {
|
||||
|
|
@ -46,48 +139,69 @@ func keySignatureSource(s *service.Signature) signature.KeySignatureSource {
|
|||
}
|
||||
}
|
||||
|
||||
func requestBody(req SignedRequest) stableMarshaler {
|
||||
switch v := req.(type) {
|
||||
case *accounting.BalanceRequest:
|
||||
return v.GetBody()
|
||||
default:
|
||||
panic(fmt.Sprintf("unknown request %T", req))
|
||||
}
|
||||
}
|
||||
func SignServiceMessage(key *ecdsa.PrivateKey, msg interface{}) error {
|
||||
var (
|
||||
body, meta, verifyOrigin stableMarshaler
|
||||
verifyHdr verificationHeader
|
||||
verifyHdrSetter func(verificationHeader)
|
||||
)
|
||||
|
||||
func SignRequest(key *ecdsa.PrivateKey, req SignedRequest) error {
|
||||
if req == nil {
|
||||
switch v := msg.(type) {
|
||||
case nil:
|
||||
return nil
|
||||
case serviceRequest:
|
||||
body = serviceMessageBody(v)
|
||||
meta = v.GetMetaHeader()
|
||||
verifyHdr = &requestVerificationHeader{new(service.RequestVerificationHeader)}
|
||||
verifyHdrSetter = func(h verificationHeader) {
|
||||
v.SetVerificationHeader(h.(*requestVerificationHeader).RequestVerificationHeader)
|
||||
}
|
||||
|
||||
// create new level of matryoshka
|
||||
verifyHdr := new(service.RequestVerificationHeader)
|
||||
if h := v.GetVerificationHeader(); h != nil {
|
||||
verifyOrigin = h
|
||||
}
|
||||
case serviceResponse:
|
||||
body = serviceMessageBody(v)
|
||||
meta = v.GetMetaHeader()
|
||||
verifyHdr = &responseVerificationHeader{new(service.ResponseVerificationHeader)}
|
||||
verifyHdrSetter = func(h verificationHeader) {
|
||||
v.SetVerificationHeader(h.(*responseVerificationHeader).ResponseVerificationHeader)
|
||||
}
|
||||
|
||||
// attach the previous matryoshka
|
||||
verifyHdr.SetOrigin(req.GetVerificationHeader())
|
||||
if h := v.GetVerificationHeader(); h != nil {
|
||||
verifyOrigin = h
|
||||
}
|
||||
default:
|
||||
panic(fmt.Sprintf("unsupported service message %T", v))
|
||||
}
|
||||
|
||||
// sign request body
|
||||
if err := signRequestPart(key, requestBody(req), verifyHdr.SetBodySignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign request body")
|
||||
if verifyOrigin == nil {
|
||||
// sign service message body
|
||||
if err := signServiceMessagePart(key, body, verifyHdr.SetBodySignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign body")
|
||||
}
|
||||
}
|
||||
|
||||
// sign meta header
|
||||
if err := signRequestPart(key, req.GetMetaHeader(), verifyHdr.SetMetaSignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign request meta header")
|
||||
if err := signServiceMessagePart(key, meta, verifyHdr.SetMetaSignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign meta header")
|
||||
}
|
||||
|
||||
// sign verification header origin
|
||||
if err := signRequestPart(key, verifyHdr.GetOrigin(), verifyHdr.SetOriginSignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign origin of request verification header")
|
||||
if err := signServiceMessagePart(key, verifyOrigin, verifyHdr.SetOriginSignature); err != nil {
|
||||
return errors.Wrap(err, "could not sign origin of verification header")
|
||||
}
|
||||
|
||||
// make a new top of the matryoshka
|
||||
req.SetVerificationHeader(verifyHdr)
|
||||
// wrap origin verification header
|
||||
verifyHdr.setOrigin(verifyOrigin)
|
||||
|
||||
// update matryoshka verification header
|
||||
verifyHdrSetter(verifyHdr)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func signRequestPart(key *ecdsa.PrivateKey, part stableMarshaler, sigWrite func(*service.Signature)) error {
|
||||
func signServiceMessagePart(key *ecdsa.PrivateKey, part stableMarshaler, sigWrite func(*service.Signature)) error {
|
||||
sig := new(service.Signature)
|
||||
|
||||
// sign part
|
||||
|
|
@ -105,34 +219,78 @@ func signRequestPart(key *ecdsa.PrivateKey, part stableMarshaler, sigWrite func(
|
|||
return nil
|
||||
}
|
||||
|
||||
func VerifyRequest(req SignedRequest) error {
|
||||
verifyHdr := req.GetVerificationHeader()
|
||||
func VerifyServiceMessage(msg interface{}) error {
|
||||
var (
|
||||
meta metaHeader
|
||||
verify verificationHeader
|
||||
)
|
||||
|
||||
// verify body signature
|
||||
if err := verifyRequestPart(requestBody(req), verifyHdr.GetBodySignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify request body")
|
||||
switch v := msg.(type) {
|
||||
case nil:
|
||||
return nil
|
||||
case serviceRequest:
|
||||
meta = &requestMetaHeader{
|
||||
RequestMetaHeader: v.GetMetaHeader(),
|
||||
}
|
||||
|
||||
// verify meta header
|
||||
if err := verifyRequestPart(req.GetMetaHeader(), verifyHdr.GetMetaSignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify request meta header")
|
||||
verify = &requestVerificationHeader{
|
||||
RequestVerificationHeader: v.GetVerificationHeader(),
|
||||
}
|
||||
case serviceResponse:
|
||||
meta = &responseMetaHeader{
|
||||
ResponseMetaHeader: v.GetMetaHeader(),
|
||||
}
|
||||
|
||||
// verify verification header origin
|
||||
if err := verifyRequestPart(verifyHdr.GetOrigin(), verifyHdr.GetOriginSignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify origin of request verification header")
|
||||
verify = &responseVerificationHeader{
|
||||
ResponseVerificationHeader: v.GetVerificationHeader(),
|
||||
}
|
||||
default:
|
||||
panic(fmt.Sprintf("unsupported service message %T", v))
|
||||
}
|
||||
|
||||
return verifyMatryoshkaLevel(serviceMessageBody(msg), meta, verify)
|
||||
}
|
||||
|
||||
func verifyMatryoshkaLevel(body stableMarshaler, meta metaHeader, verify verificationHeader) error {
|
||||
if err := verifyServiceMessagePart(meta, verify.GetMetaSignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify meta header")
|
||||
}
|
||||
|
||||
origin := verify.getOrigin()
|
||||
|
||||
if err := verifyServiceMessagePart(origin, verify.GetOriginSignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify origin of verification header")
|
||||
}
|
||||
|
||||
if origin == nil {
|
||||
if err := verifyServiceMessagePart(body, verify.GetBodySignature); err != nil {
|
||||
return errors.Wrap(err, "could not verify body")
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
if verify.GetBodySignature() != nil {
|
||||
return errors.New("body signature at the matryoshka upper level")
|
||||
}
|
||||
|
||||
return verifyMatryoshkaLevel(body, meta.getOrigin(), origin)
|
||||
}
|
||||
|
||||
func verifyRequestPart(part stableMarshaler, sigRdr func() *service.Signature) error {
|
||||
if err := signature.VerifyDataWithSource(
|
||||
func verifyServiceMessagePart(part stableMarshaler, sigRdr func() *service.Signature) error {
|
||||
return signature.VerifyDataWithSource(
|
||||
&stableMarshalerWrapper{part},
|
||||
keySignatureSource(sigRdr()),
|
||||
); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
)
|
||||
}
|
||||
|
||||
func serviceMessageBody(req interface{}) stableMarshaler {
|
||||
switch v := req.(type) {
|
||||
case *accounting.BalanceRequest:
|
||||
return v.GetBody()
|
||||
case *accounting.BalanceResponse:
|
||||
return v.GetBody()
|
||||
default:
|
||||
panic(fmt.Sprintf("unsupported service message %T", req))
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue