forked from keys-pub/keys-ext
/
verify.go
277 lines (239 loc) · 5.44 KB
/
verify.go
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package service
import (
"context"
"io"
"github.com/burlingtonbertie99/mykeys/saltpack"
"github.com/pkg/errors"
"google.golang.org/grpc"
)
// Verify (RPC) ...
func (s *service) Verify(ctx context.Context, req *VerifyRequest) (*VerifyResponse, error) {
verified, kid, err := saltpack.Verify(req.Data)
if err != nil {
return nil, err
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(ctx, kid)
if err != nil {
return nil, err
}
signer = s
// If we don't have the key saved, don't include the user information.
if !signer.Saved {
signer.User = nil
}
}
return &VerifyResponse{Data: verified, Signer: signer}, nil
}
// VerifyDetached (RPC) ...
func (s *service) VerifyDetached(ctx context.Context, req *VerifyDetachedRequest) (*VerifyDetachedResponse, error) {
kid, err := saltpack.VerifyDetached(req.Sig, req.Data)
if err != nil {
return nil, err
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(ctx, kid)
if err != nil {
return nil, err
}
signer = s
}
return &VerifyDetachedResponse{Signer: signer}, nil
}
// VerifyFile (RPC) ...
func (s *service) VerifyFile(srv RPC_VerifyFileServer) error {
req, err := srv.Recv()
if err != nil {
return err
}
if req.In == "" {
return errors.Errorf("in not specified")
}
out, err := resolveOutPath(req.Out, req.In, ".signed")
if err != nil {
return err
}
signer, err := s.verifyWriteInOut(srv.Context(), req.In, out)
if err != nil {
return err
}
if err := srv.Send(&VerifyFileOutput{
Signer: signer,
Out: out,
}); err != nil {
return err
}
// if err := srv.SendAndClose(&VerifyFileOutput{
// Signer: signer,
// Out: out,
// }); err != nil {
// return err
// }
return nil
}
// VerifyDetachedFile (RPC) ...
func (s *service) VerifyDetachedFile(srv RPC_VerifyDetachedFileServer) error {
req, err := srv.Recv()
if err != nil {
return err
}
in := req.In
if in == "" {
return errors.Errorf("in not specified")
}
signer, err := s.verifyDetachedIn(srv.Context(), req.Sig, in)
if err != nil {
return err
}
resp := &VerifyDetachedResponse{
Signer: signer,
}
return srv.SendAndClose(resp)
}
// VerifyStream (RPC) ...
func (s *service) VerifyStream(srv RPC_VerifyStreamServer) error {
return s.verifyStream(srv, false)
}
type verifyStreamServer interface {
Send(*VerifyOutput) error
Recv() (*VerifyInput, error)
grpc.ServerStream
}
func (s *service) verifyStream(srv verifyStreamServer, armored bool) error {
recvFn := func() ([]byte, error) {
req, recvErr := srv.Recv()
if recvErr != nil {
return nil, recvErr
}
return req.Data, nil
}
reader := newStreamReader(srv.Context(), recvFn)
streamReader, kid, err := saltpack.NewVerifyStream(reader)
if err != nil {
return errors.Wrapf(err, "faild to verify stream")
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(srv.Context(), kid)
if err != nil {
return err
}
signer = s
}
sendFn := func(b []byte, signer *Key) error {
resp := VerifyOutput{
Data: b,
Signer: signer,
}
return srv.Send(&resp)
}
if err := s.readFromStream(srv.Context(), streamReader, signer, sendFn); err != nil {
return errors.Wrapf(err, "failed to read from verify stream")
}
return nil
}
// VerifyDetachedStream (RPC) ...
func (s *service) VerifyDetachedStream(srv RPC_VerifyDetachedStreamServer) error {
ctx := srv.Context()
first, err := srv.Recv()
if err != nil {
return err
}
recvFn := func() ([]byte, error) {
req, recvErr := srv.Recv()
if recvErr != nil {
return nil, recvErr
}
return req.Data, nil
}
reader := newStreamReader(srv.Context(), recvFn)
if err := reader.write(first.Data); err != nil {
return err
}
kid, err := saltpack.VerifyDetachedReader(first.Sig, reader)
if err != nil {
return err
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(ctx, kid)
if err != nil {
return err
}
signer = s
}
resp := &VerifyDetachedResponse{
Signer: signer,
}
return srv.SendAndClose(resp)
}
// VerifyStreamClient ...
type VerifyStreamClient interface {
Send(*VerifyInput) error
Recv() (*VerifyOutput, error)
grpc.ClientStream
}
// NewVerifyStreamClient ...
func NewVerifyStreamClient(ctx context.Context, cl RPCClient) (VerifyStreamClient, error) {
return cl.VerifyStream(ctx)
}
func (s *service) readFromStream(ctx context.Context, streamReader io.Reader, signer *Key, sendFn func(b []byte, signer *Key) error) error {
buf := make([]byte, 1024*1024)
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
}
n, err := streamReader.Read(buf)
if n != 0 {
if err := sendFn(buf[:n], signer); err != nil {
return err
}
}
if err != nil {
if err == io.EOF {
// Send empty bytes denotes EOF
if err := sendFn([]byte{}, signer); err != nil {
return err
}
break
}
return err
}
}
return nil
}
func (s *service) verifyWriteInOut(ctx context.Context, in string, out string) (*Key, error) {
kid, err := saltpack.VerifyFile(in, out)
if err != nil {
return nil, err
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(ctx, kid)
if err != nil {
return nil, err
}
signer = s
}
return signer, nil
}
func (s *service) verifyDetachedIn(ctx context.Context, sig []byte, in string) (*Key, error) {
logger.Infof("Verify (detached) %s", in)
kid, err := saltpack.VerifyFileDetached(sig, in)
if err != nil {
return nil, err
}
var signer *Key
if kid != "" {
s, err := s.verifyKey(ctx, kid)
if err != nil {
return nil, err
}
signer = s
}
return signer, nil
}