Esempio n. 1
0
// CreateCertificate requests the creation of a new transaction certificate by the TCA.
//
func (tcap *TCAP) CreateCertificate(ctx context.Context, req *pb.TCertCreateReq) (*pb.Cert, error) {
	Trace.Println("grpc TCAP:CreateCertificate")

	id := req.Id.Id
	raw, err := tcap.tca.eca.readCertificate(id)
	if err != nil {
		return nil, err
	}
	cert, err := x509.ParseCertificate(raw)
	if err != nil {
		return nil, err
	}

	sig := req.Sig
	req.Sig = nil

	r, s := big.NewInt(0), big.NewInt(0)
	r.UnmarshalText(sig.R)
	s.UnmarshalText(sig.S)

	raw = req.Pub.Key
	if req.Pub.Type != pb.CryptoType_ECDSA {
		Error.Println("unsupported key type")
		return nil, errors.New("unsupported key type")
	}
	pub, err := x509.ParsePKIXPublicKey(req.Pub.Key)
	if err != nil {
		Error.Println(err)
		return nil, err
	}

	hash := sha3.New384()
	raw, _ = proto.Marshal(req)
	hash.Write(raw)
	if ecdsa.Verify(cert.PublicKey.(*ecdsa.PublicKey), hash.Sum(nil), r, s) == false {
		Error.Println("signature does not verify")
		return nil, errors.New("signature does not verify")
	}

	if raw, err = tcap.tca.newCertificate(id, pub.(*ecdsa.PublicKey), req.Ts.Seconds); err != nil {
		Error.Println(err)
		return nil, err
	}

	return &pb.Cert{raw}, nil
}
Esempio n. 2
0
// CreateCertificate requests the creation of a new transaction certificate by the TCA.
//
func (tcap *TCAP) CreateCertificate(ctx context.Context, in *pb.TCertCreateReq) (*pb.TCertCreateResp, error) {
	Trace.Println("grpc TCAP:CreateCertificate")

	id := in.Id.Id
	raw, err := tcap.tca.eca.readCertificate(id, x509.KeyUsageDigitalSignature)
	if err != nil {
		return nil, err
	}
	cert, err := x509.ParseCertificate(raw)
	if err != nil {
		return nil, err
	}

	sig := in.Sig
	in.Sig = nil

	r, s := big.NewInt(0), big.NewInt(0)
	r.UnmarshalText(sig.R)
	s.UnmarshalText(sig.S)

	raw = in.Pub.Key
	if in.Pub.Type != pb.CryptoType_ECDSA {
		return nil, errors.New("unsupported key type")
	}
	pub, err := x509.ParsePKIXPublicKey(in.Pub.Key)
	if err != nil {
		return nil, err
	}

	hash := utils.NewHash()
	raw, _ = proto.Marshal(in)
	hash.Write(raw)
	if ecdsa.Verify(cert.PublicKey.(*ecdsa.PublicKey), hash.Sum(nil), r, s) == false {
		return nil, errors.New("signature does not verify")
	}

	if raw, err = tcap.tca.createCertificate(id, pub.(*ecdsa.PublicKey), x509.KeyUsageDigitalSignature, in.Ts.Seconds, nil); err != nil {
		Error.Println(err)
		return nil, err
	}

	return &pb.TCertCreateResp{&pb.Cert{raw}}, nil
}