aboutsummaryrefslogtreecommitdiff
path: root/accounts/scwallet/apdu.go
diff options
context:
space:
mode:
authorDeterminant <[email protected]>2020-06-28 14:47:41 -0400
committerDeterminant <[email protected]>2020-06-28 14:47:41 -0400
commitd235e2c6a5788ec4a6cff15a16f56b38a3876a0d (patch)
tree5f2727f7a50ee5840f889c82776d3a30a88dd59b /accounts/scwallet/apdu.go
parent13ebd8bd9468e9d769d598b0ca2afb72ba78cb97 (diff)
...
Diffstat (limited to 'accounts/scwallet/apdu.go')
-rw-r--r--accounts/scwallet/apdu.go87
1 files changed, 87 insertions, 0 deletions
diff --git a/accounts/scwallet/apdu.go b/accounts/scwallet/apdu.go
new file mode 100644
index 0000000..bd36606
--- /dev/null
+++ b/accounts/scwallet/apdu.go
@@ -0,0 +1,87 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package scwallet
+
+import (
+ "bytes"
+ "encoding/binary"
+ "fmt"
+)
+
+// commandAPDU represents an application data unit sent to a smartcard.
+type commandAPDU struct {
+ Cla, Ins, P1, P2 uint8 // Class, Instruction, Parameter 1, Parameter 2
+ Data []byte // Command data
+ Le uint8 // Command data length
+}
+
+// serialize serializes a command APDU.
+func (ca commandAPDU) serialize() ([]byte, error) {
+ buf := new(bytes.Buffer)
+
+ if err := binary.Write(buf, binary.BigEndian, ca.Cla); err != nil {
+ return nil, err
+ }
+ if err := binary.Write(buf, binary.BigEndian, ca.Ins); err != nil {
+ return nil, err
+ }
+ if err := binary.Write(buf, binary.BigEndian, ca.P1); err != nil {
+ return nil, err
+ }
+ if err := binary.Write(buf, binary.BigEndian, ca.P2); err != nil {
+ return nil, err
+ }
+ if len(ca.Data) > 0 {
+ if err := binary.Write(buf, binary.BigEndian, uint8(len(ca.Data))); err != nil {
+ return nil, err
+ }
+ if err := binary.Write(buf, binary.BigEndian, ca.Data); err != nil {
+ return nil, err
+ }
+ }
+ if err := binary.Write(buf, binary.BigEndian, ca.Le); err != nil {
+ return nil, err
+ }
+ return buf.Bytes(), nil
+}
+
+// responseAPDU represents an application data unit received from a smart card.
+type responseAPDU struct {
+ Data []byte // response data
+ Sw1, Sw2 uint8 // status words 1 and 2
+}
+
+// deserialize deserializes a response APDU.
+func (ra *responseAPDU) deserialize(data []byte) error {
+ if len(data) < 2 {
+ return fmt.Errorf("can not deserialize data: payload too short (%d < 2)", len(data))
+ }
+
+ ra.Data = make([]byte, len(data)-2)
+
+ buf := bytes.NewReader(data)
+ if err := binary.Read(buf, binary.BigEndian, &ra.Data); err != nil {
+ return err
+ }
+ if err := binary.Read(buf, binary.BigEndian, &ra.Sw1); err != nil {
+ return err
+ }
+ if err := binary.Read(buf, binary.BigEndian, &ra.Sw2); err != nil {
+ return err
+ }
+ return nil
+}