add GetResponse command

globalplatform/commands.go

@@ -6,23 +6,30 @@ import (
 )
 
 const (
-	Cla    = uint8(0x00)
-	ClaGp  = uint8(0x80)
-	ClaMac = uint8(0x84)
+	ClaISO7816 = uint8(0x00)
+	ClaGp      = uint8(0x80)
+	ClaMac     = uint8(0x84)
 
 	InsSelect               = uint8(0xA4)
 	InsInitializeUpdate     = uint8(0x50)
 	InsExternalAuthenticate = uint8(0x82)
+	InsGetResponse          = uint8(0xC0)
+
+	Sw1ResponseDataIncomplete = uint8(0x61)
 )
 
 func NewCommandSelect(aid []byte) *apdu.Command {
-	return apdu.NewCommand(
-		Cla,
+	c := apdu.NewCommand(
+		ClaISO7816,
 		InsSelect,
 		uint8(0x04),
 		uint8(0x00),
 		aid,
 	)
+
+	c.SetLe(0x00)
+
+	return c
 }
 
 func NewCommandInitializeUpdate(challenge []byte) *apdu.Command {
@@ -50,6 +57,20 @@ func NewCommandExternalAuthenticate(encKey, cardChallenge, hostChallenge []byte)
 	), nil
 }
 
+func NewCommandGetResponse(length uint8) *apdu.Command {
+	c := apdu.NewCommand(
+		ClaISO7816,
+		InsGetResponse,
+		uint8(0),
+		uint8(0),
+		nil,
+	)
+
+	c.SetLe(length)
+
+	return c
+}
+
 func calculateHostCryptogram(encKey, cardChallenge, hostChallenge []byte) ([]byte, error) {
 	var data []byte
 	data = append(data, cardChallenge...)

globalplatform/session.go

@@ -59,3 +59,11 @@ func NewSession(cardKeys *KeyProvider, resp *apdu.Response, hostChallenge []byte
 
 	return s, nil
 }
+
+func (s *Session) KeyProvider() *KeyProvider {
+	return s.keyProvider
+}
+
+func (s *Session) CardChallenge() []byte {
+	return s.cardChallenge
+}