accounts, core, internal, node: Add support for smartcard wallets

2018-01-07 18:38:11 +00:00
parent 3996bc1ad9
commit f7027dd68c
21 changed files with 5364 additions and 0 deletions
--- a/vendor/github.com/ebfe/scard/LICENSE
+++ b/vendor/github.com/ebfe/scard/LICENSE
@@ -0,0 +1,23 @@
+Copyright (c) 2016, Michael Gehring <mg@ebfe.org>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimer in the documentation and/or
+  other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/vendor/github.com/ebfe/scard/README.md
+++ b/vendor/github.com/ebfe/scard/README.md
@@ -0,0 +1,14 @@
+scard
+=====
+
+[![GoDoc](https://godoc.org/github.com/ebfe/scard?status.svg)](https://godoc.org/github.com/ebfe/scard)
+
+Go bindings to the PC/SC API.
+
+## Installation
+
+	go get github.com/ebfe/scard
+
+## Bugs
+
+	- Memory layouts/GC needs a thorough review.
--- a/vendor/github.com/ebfe/scard/scard.go
+++ b/vendor/github.com/ebfe/scard/scard.go
@@ -0,0 +1,283 @@
+// Package scard provides bindings to the PC/SC API.
+package scard
+
+import (
+	"time"
+	"unsafe"
+)
+
+type CardStatus struct {
+	Reader         string
+	State          State
+	ActiveProtocol Protocol
+	Atr            []byte
+}
+
+type ReaderState struct {
+	Reader       string
+	UserData     interface{}
+	CurrentState StateFlag
+	EventState   StateFlag
+	Atr          []byte
+}
+
+type Context struct {
+	ctx uintptr
+}
+
+type Card struct {
+	handle         uintptr
+	activeProtocol Protocol
+}
+
+// wraps SCardEstablishContext
+func EstablishContext() (*Context, error) {
+	ctx, r := scardEstablishContext(ScopeSystem, 0, 0)
+	if r != ErrSuccess {
+		return nil, r
+	}
+
+	return &Context{ctx: ctx}, nil
+}
+
+// wraps SCardIsValidContext
+func (ctx *Context) IsValid() (bool, error) {
+	r := scardIsValidContext(ctx.ctx)
+	switch r {
+	case ErrSuccess:
+		return true, nil
+	case ErrInvalidHandle:
+		return false, nil
+	default:
+		return false, r
+	}
+}
+
+// wraps SCardCancel
+func (ctx *Context) Cancel() error {
+	r := scardCancel(ctx.ctx)
+	if r != ErrSuccess {
+		return r
+	}
+	return nil
+}
+
+// wraps SCardReleaseContext
+func (ctx *Context) Release() error {
+	r := scardReleaseContext(ctx.ctx)
+	if r != ErrSuccess {
+		return r
+	}
+	return nil
+}
+
+// wraps SCardListReaders
+func (ctx *Context) ListReaders() ([]string, error) {
+	needed, r := scardListReaders(ctx.ctx, nil, nil, 0)
+	if r != ErrSuccess {
+		return nil, r
+	}
+
+	buf := make(strbuf, needed)
+	n, r := scardListReaders(ctx.ctx, nil, buf.ptr(), uint32(len(buf)))
+	if r != ErrSuccess {
+		return nil, r
+	}
+	return decodemstr(buf[:n]), nil
+}
+
+// wraps SCardListReaderGroups
+func (ctx *Context) ListReaderGroups() ([]string, error) {
+	needed, r := scardListReaderGroups(ctx.ctx, nil, 0)
+	if r != ErrSuccess {
+		return nil, r
+	}
+
+	buf := make(strbuf, needed)
+	n, r := scardListReaderGroups(ctx.ctx, buf.ptr(), uint32(len(buf)))
+	if r != ErrSuccess {
+		return nil, r
+	}
+	return decodemstr(buf[:n]), nil
+}
+
+// wraps SCardGetStatusChange
+func (ctx *Context) GetStatusChange(readerStates []ReaderState, timeout time.Duration) error {
+
+	dwTimeout := durationToTimeout(timeout)
+	states := make([]scardReaderState, len(readerStates))
+
+	for i := range readerStates {
+		var err error
+		states[i], err = readerStates[i].toSys()
+		if err != nil {
+			return err
+		}
+	}
+
+	r := scardGetStatusChange(ctx.ctx, dwTimeout, states)
+	if r != ErrSuccess {
+		return r
+	}
+
+	for i := range readerStates {
+		(&readerStates[i]).update(&states[i])
+	}
+
+	return nil
+}
+
+// wraps SCardConnect
+func (ctx *Context) Connect(reader string, mode ShareMode, proto Protocol) (*Card, error) {
+	creader, err := encodestr(reader)
+	if err != nil {
+		return nil, err
+	}
+	handle, activeProtocol, r := scardConnect(ctx.ctx, creader.ptr(), mode, proto)
+	if r != ErrSuccess {
+		return nil, r
+	}
+	return &Card{handle: handle, activeProtocol: activeProtocol}, nil
+}
+
+// wraps SCardDisconnect
+func (card *Card) Disconnect(d Disposition) error {
+	r := scardDisconnect(card.handle, d)
+	if r != ErrSuccess {
+		return r
+	}
+	return nil
+}
+
+// wraps SCardReconnect
+func (card *Card) Reconnect(mode ShareMode, proto Protocol, disp Disposition) error {
+	activeProtocol, r := scardReconnect(card.handle, mode, proto, disp)
+	if r != ErrSuccess {
+		return r
+	}
+	card.activeProtocol = activeProtocol
+	return nil
+}
+
+// wraps SCardBeginTransaction
+func (card *Card) BeginTransaction() error {
+	r := scardBeginTransaction(card.handle)
+	if r != ErrSuccess {
+		return r
+	}
+	return nil
+}
+
+// wraps SCardEndTransaction
+func (card *Card) EndTransaction(disp Disposition) error {
+	r := scardEndTransaction(card.handle, disp)
+	if r != ErrSuccess {
+		return r
+	}
+	return nil
+}
+
+// wraps SCardStatus
+func (card *Card) Status() (*CardStatus, error) {
+	reader, state, proto, atr, err := scardCardStatus(card.handle)
+	if err != ErrSuccess {
+		return nil, err
+	}
+	return &CardStatus{Reader: reader, State: state, ActiveProtocol: proto, Atr: atr}, nil
+}
+
+// wraps SCardTransmit
+func (card *Card) Transmit(cmd []byte) ([]byte, error) {
+	rsp := make([]byte, maxBufferSizeExtended)
+	rspLen, err := scardTransmit(card.handle, card.activeProtocol, cmd, rsp)
+	if err != ErrSuccess {
+		return nil, err
+	}
+	return rsp[:rspLen], nil
+}
+
+// wraps SCardControl
+func (card *Card) Control(ioctl uint32, in []byte) ([]byte, error) {
+	var out [0xffff]byte
+	outLen, err := scardControl(card.handle, ioctl, in, out[:])
+	if err != ErrSuccess {
+		return nil, err
+	}
+	return out[:outLen], nil
+}
+
+// wraps SCardGetAttrib
+func (card *Card) GetAttrib(id Attrib) ([]byte, error) {
+	needed, err := scardGetAttrib(card.handle, id, nil)
+	if err != ErrSuccess {
+		return nil, err
+	}
+
+	var attrib = make([]byte, needed)
+	n, err := scardGetAttrib(card.handle, id, attrib)
+	if err != ErrSuccess {
+		return nil, err
+	}
+	return attrib[:n], nil
+}
+
+// wraps SCardSetAttrib
+func (card *Card) SetAttrib(id Attrib, data []byte) error {
+	err := scardSetAttrib(card.handle, id, data)
+	if err != ErrSuccess {
+		return err
+	}
+	return nil
+}
+
+func durationToTimeout(timeout time.Duration) uint32 {
+	switch {
+	case timeout < 0:
+		return infiniteTimeout
+	case timeout > time.Duration(infiniteTimeout)*time.Millisecond:
+		return infiniteTimeout - 1
+	default:
+		return uint32(timeout / time.Millisecond)
+	}
+}
+
+func (buf strbuf) ptr() unsafe.Pointer {
+	return unsafe.Pointer(&buf[0])
+}
+
+func (buf strbuf) split() []strbuf {
+	var chunks []strbuf
+	for len(buf) > 0 && buf[0] != 0 {
+		i := 0
+		for i = range buf {
+			if buf[i] == 0 {
+				break
+			}
+		}
+		chunks = append(chunks, buf[:i+1])
+		buf = buf[i+1:]
+	}
+
+	return chunks
+}
+
+func encodemstr(strings ...string) (strbuf, error) {
+	var buf strbuf
+	for _, s := range strings {
+		utf16, err := encodestr(s)
+		if err != nil {
+			return nil, err
+		}
+		buf = append(buf, utf16...)
+	}
+	buf = append(buf, 0)
+	return buf, nil
+}
+
+func decodemstr(buf strbuf) []string {
+	var strings []string
+	for _, chunk := range buf.split() {
+		strings = append(strings, decodestr(chunk))
+	}
+	return strings
+}
--- a/vendor/github.com/ebfe/scard/scard_darwin.go
+++ b/vendor/github.com/ebfe/scard/scard_darwin.go
@@ -0,0 +1,219 @@
+// +build darwin
+
+package scard
+
+// #cgo LDFLAGS: -framework PCSC
+// #cgo CFLAGS: -I /usr/include
+// #include <stdlib.h>
+// #include <PCSC/winscard.h>
+// #include <PCSC/wintypes.h>
+import "C"
+
+import (
+	"unsafe"
+)
+
+func (e Error) Error() string {
+	return "scard: " + C.GoString(C.pcsc_stringify_error(C.int32_t(e)))
+}
+
+// Version returns the libpcsclite version string
+func Version() string {
+	return C.PCSCLITE_VERSION_NUMBER
+}
+
+func scardEstablishContext(scope Scope, reserved1, reserved2 uintptr) (uintptr, Error) {
+	var ctx C.SCARDCONTEXT
+	r := C.SCardEstablishContext(C.uint32_t(scope), unsafe.Pointer(reserved1), unsafe.Pointer(reserved2), &ctx)
+	return uintptr(ctx), Error(r)
+}
+
+func scardIsValidContext(ctx uintptr) Error {
+	r := C.SCardIsValidContext(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardCancel(ctx uintptr) Error {
+	r := C.SCardCancel(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardReleaseContext(ctx uintptr) Error {
+	r := C.SCardReleaseContext(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardListReaders(ctx uintptr, groups, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := C.uint32_t(bufLen)
+	r := C.SCardListReaders(C.SCARDCONTEXT(ctx), (C.LPCSTR)(groups), (C.LPSTR)(buf), &dwBufLen)
+	return uint32(dwBufLen), Error(r)
+}
+
+func scardListReaderGroups(ctx uintptr, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := C.uint32_t(bufLen)
+	r := C.SCardListReaderGroups(C.SCARDCONTEXT(ctx), (C.LPSTR)(buf), &dwBufLen)
+	return uint32(dwBufLen), Error(r)
+}
+
+func scardGetStatusChange(ctx uintptr, timeout uint32, states []scardReaderState) Error {
+	// In darwin, the LPSCARD_READERSTATE_A has 1 byte alignment and hence
+	// has no trailing padding. Go does add 3 bytes of padding (on both 32
+	// and 64 bits), so we pack an array manually instead.
+	const size = int(unsafe.Sizeof(states[0])) - 3
+	buf := make([]byte, size*len(states))
+	for i, _ := range states {
+		copy(buf[i*size:(i+1)*size], (*(*[size]byte)(unsafe.Pointer(&states[i])))[:])
+	}
+	r := C.SCardGetStatusChange(C.SCARDCONTEXT(ctx), C.uint32_t(timeout), (C.LPSCARD_READERSTATE_A)(unsafe.Pointer(&buf[0])), C.uint32_t(len(states)))
+	for i, _ := range states {
+		copy((*(*[size]byte)(unsafe.Pointer(&states[i])))[:], buf[i*size:(i+1)*size])
+	}
+	return Error(r)
+}
+
+func scardConnect(ctx uintptr, reader unsafe.Pointer, shareMode ShareMode, proto Protocol) (uintptr, Protocol, Error) {
+	var handle C.SCARDHANDLE
+	var activeProto C.uint32_t
+
+	r := C.SCardConnect(C.SCARDCONTEXT(ctx), C.LPCSTR(reader), C.uint32_t(shareMode), C.uint32_t(proto), &handle, &activeProto)
+
+	return uintptr(handle), Protocol(activeProto), Error(r)
+}
+
+func scardDisconnect(card uintptr, d Disposition) Error {
+	r := C.SCardDisconnect(C.SCARDHANDLE(card), C.uint32_t(d))
+	return Error(r)
+}
+
+func scardReconnect(card uintptr, mode ShareMode, proto Protocol, disp Disposition) (Protocol, Error) {
+	var activeProtocol C.uint32_t
+	r := C.SCardReconnect(C.SCARDHANDLE(card), C.uint32_t(mode), C.uint32_t(proto), C.uint32_t(disp), &activeProtocol)
+	return Protocol(activeProtocol), Error(r)
+}
+
+func scardBeginTransaction(card uintptr) Error {
+	r := C.SCardBeginTransaction(C.SCARDHANDLE(card))
+	return Error(r)
+}
+
+func scardEndTransaction(card uintptr, disp Disposition) Error {
+	r := C.SCardEndTransaction(C.SCARDHANDLE(card), C.uint32_t(disp))
+	return Error(r)
+}
+
+func scardCardStatus(card uintptr) (string, State, Protocol, []byte, Error) {
+	var readerBuf [C.MAX_READERNAME + 1]byte
+	var readerLen = C.uint32_t(len(readerBuf))
+	var state, proto C.uint32_t
+	var atr [maxAtrSize]byte
+	var atrLen = C.uint32_t(len(atr))
+
+	r := C.SCardStatus(C.SCARDHANDLE(card), (C.LPSTR)(unsafe.Pointer(&readerBuf[0])), &readerLen, &state, &proto, (*C.uchar)(&atr[0]), &atrLen)
+
+	return decodestr(readerBuf[:readerLen]), State(state), Protocol(proto), atr[:atrLen], Error(r)
+}
+
+func scardTransmit(card uintptr, proto Protocol, cmd []byte, rsp []byte) (uint32, Error) {
+	var sendpci C.SCARD_IO_REQUEST
+	var recvpci C.SCARD_IO_REQUEST
+	var rspLen = C.uint32_t(len(rsp))
+
+	switch proto {
+	case ProtocolT0, ProtocolT1:
+		sendpci.dwProtocol = C.uint32_t(proto)
+	default:
+		panic("unknown protocol")
+	}
+	sendpci.cbPciLength = C.sizeof_SCARD_IO_REQUEST
+
+	r := C.SCardTransmit(C.SCARDHANDLE(card), &sendpci, (*C.uchar)(&cmd[0]), C.uint32_t(len(cmd)), &recvpci, (*C.uchar)(&rsp[0]), &rspLen)
+
+	return uint32(rspLen), Error(r)
+}
+
+func scardControl(card uintptr, ioctl uint32, in, out []byte) (uint32, Error) {
+	var ptrIn unsafe.Pointer
+	var outLen = C.uint32_t(len(out))
+
+	if len(in) != 0 {
+		ptrIn = unsafe.Pointer(&in[0])
+	}
+
+	r := C.SCardControl(C.SCARDHANDLE(card), C.uint32_t(ioctl), ptrIn, C.uint32_t(len(in)), unsafe.Pointer(&out[0]), C.uint32_t(len(out)), &outLen)
+	return uint32(outLen), Error(r)
+}
+
+func scardGetAttrib(card uintptr, id Attrib, buf []byte) (uint32, Error) {
+	var ptr *C.uint8_t
+
+	if len(buf) != 0 {
+		ptr = (*C.uint8_t)(&buf[0])
+	}
+
+	bufLen := C.uint32_t(len(buf))
+	r := C.SCardGetAttrib(C.SCARDHANDLE(card), C.uint32_t(id), ptr, &bufLen)
+
+	return uint32(bufLen), Error(r)
+}
+
+func scardSetAttrib(card uintptr, id Attrib, buf []byte) Error {
+	r := C.SCardSetAttrib(C.SCARDHANDLE(card), C.uint32_t(id), ((*C.uint8_t)(&buf[0])), C.uint32_t(len(buf)))
+	return Error(r)
+}
+
+type strbuf []byte
+
+func encodestr(s string) (strbuf, error) {
+	buf := strbuf(s + "\x00")
+	return buf, nil
+}
+
+func decodestr(buf strbuf) string {
+	if len(buf) == 0 {
+		return ""
+	}
+
+	if buf[len(buf)-1] == 0 {
+		buf = buf[:len(buf)-1]
+	}
+
+	return string(buf)
+}
+
+type scardReaderState struct {
+	szReader       uintptr
+	pvUserData     uintptr
+	dwCurrentState uint32
+	dwEventState   uint32
+	cbAtr          uint32
+	rgbAtr         [33]byte
+}
+
+var pinned = map[string]*strbuf{}
+
+func (rs *ReaderState) toSys() (scardReaderState, error) {
+	var sys scardReaderState
+
+	creader, err := encodestr(rs.Reader)
+	if err != nil {
+		return scardReaderState{}, err
+	}
+	pinned[rs.Reader] = &creader
+	sys.szReader = uintptr(creader.ptr())
+	sys.dwCurrentState = uint32(rs.CurrentState)
+	sys.cbAtr = uint32(len(rs.Atr))
+	for i, v := range rs.Atr {
+		sys.rgbAtr[i] = byte(v)
+	}
+	return sys, nil
+}
+
+func (rs *ReaderState) update(sys *scardReaderState) {
+	rs.EventState = StateFlag(sys.dwEventState)
+	if sys.cbAtr > 0 {
+		rs.Atr = make([]byte, int(sys.cbAtr))
+		for i := 0; i < int(sys.cbAtr); i++ {
+			rs.Atr[i] = byte(sys.rgbAtr[i])
+		}
+	}
+}
--- a/vendor/github.com/ebfe/scard/scard_unix.go
+++ b/vendor/github.com/ebfe/scard/scard_unix.go
@@ -0,0 +1,206 @@
+// +build !windows,!darwin
+
+package scard
+
+// #cgo pkg-config: libpcsclite
+// #include <stdlib.h>
+// #include <winscard.h>
+import "C"
+
+import (
+	"unsafe"
+)
+
+func (e Error) Error() string {
+	return "scard: " + C.GoString(C.pcsc_stringify_error(C.LONG(e)))
+}
+
+// Version returns the libpcsclite version string
+func Version() string {
+	return C.PCSCLITE_VERSION_NUMBER
+}
+
+func scardEstablishContext(scope Scope, reserved1, reserved2 uintptr) (uintptr, Error) {
+	var ctx C.SCARDCONTEXT
+	r := C.SCardEstablishContext(C.DWORD(scope), C.LPCVOID(reserved1), C.LPCVOID(reserved2), &ctx)
+	return uintptr(ctx), Error(r)
+}
+
+func scardIsValidContext(ctx uintptr) Error {
+	r := C.SCardIsValidContext(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardCancel(ctx uintptr) Error {
+	r := C.SCardCancel(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardReleaseContext(ctx uintptr) Error {
+	r := C.SCardReleaseContext(C.SCARDCONTEXT(ctx))
+	return Error(r)
+}
+
+func scardListReaders(ctx uintptr, groups, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := C.DWORD(bufLen)
+	r := C.SCardListReaders(C.SCARDCONTEXT(ctx), (C.LPCSTR)(groups), (C.LPSTR)(buf), &dwBufLen)
+	return uint32(dwBufLen), Error(r)
+}
+
+func scardListReaderGroups(ctx uintptr, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := C.DWORD(bufLen)
+	r := C.SCardListReaderGroups(C.SCARDCONTEXT(ctx), (C.LPSTR)(buf), &dwBufLen)
+	return uint32(dwBufLen), Error(r)
+}
+
+func scardGetStatusChange(ctx uintptr, timeout uint32, states []scardReaderState) Error {
+	r := C.SCardGetStatusChange(C.SCARDCONTEXT(ctx), C.DWORD(timeout), (C.LPSCARD_READERSTATE)(unsafe.Pointer(&states[0])), C.DWORD(len(states)))
+	return Error(r)
+}
+
+func scardConnect(ctx uintptr, reader unsafe.Pointer, shareMode ShareMode, proto Protocol) (uintptr, Protocol, Error) {
+	var handle C.SCARDHANDLE
+	var activeProto C.DWORD
+
+	r := C.SCardConnect(C.SCARDCONTEXT(ctx), C.LPCSTR(reader), C.DWORD(shareMode), C.DWORD(proto), &handle, &activeProto)
+
+	return uintptr(handle), Protocol(activeProto), Error(r)
+}
+
+func scardDisconnect(card uintptr, d Disposition) Error {
+	r := C.SCardDisconnect(C.SCARDHANDLE(card), C.DWORD(d))
+	return Error(r)
+}
+
+func scardReconnect(card uintptr, mode ShareMode, proto Protocol, disp Disposition) (Protocol, Error) {
+	var activeProtocol C.DWORD
+	r := C.SCardReconnect(C.SCARDHANDLE(card), C.DWORD(mode), C.DWORD(proto), C.DWORD(disp), &activeProtocol)
+	return Protocol(activeProtocol), Error(r)
+}
+
+func scardBeginTransaction(card uintptr) Error {
+	r := C.SCardBeginTransaction(C.SCARDHANDLE(card))
+	return Error(r)
+}
+
+func scardEndTransaction(card uintptr, disp Disposition) Error {
+	r := C.SCardEndTransaction(C.SCARDHANDLE(card), C.DWORD(disp))
+	return Error(r)
+}
+
+func scardCardStatus(card uintptr) (string, State, Protocol, []byte, Error) {
+	var readerBuf [C.MAX_READERNAME + 1]byte
+	var readerLen = C.DWORD(len(readerBuf))
+	var state, proto C.DWORD
+	var atr [maxAtrSize]byte
+	var atrLen = C.DWORD(len(atr))
+
+	r := C.SCardStatus(C.SCARDHANDLE(card), (C.LPSTR)(unsafe.Pointer(&readerBuf[0])), &readerLen, &state, &proto, (*C.BYTE)(&atr[0]), &atrLen)
+
+	return decodestr(readerBuf[:readerLen]), State(state), Protocol(proto), atr[:atrLen], Error(r)
+}
+
+func scardTransmit(card uintptr, proto Protocol, cmd []byte, rsp []byte) (uint32, Error) {
+	var sendpci C.SCARD_IO_REQUEST
+	var recvpci C.SCARD_IO_REQUEST
+	var rspLen = C.DWORD(len(rsp))
+
+	switch proto {
+	case ProtocolT0, ProtocolT1:
+		sendpci.dwProtocol = C.ulong(proto)
+	default:
+		panic("unknown protocol")
+	}
+	sendpci.cbPciLength = C.sizeof_SCARD_IO_REQUEST
+
+	r := C.SCardTransmit(C.SCARDHANDLE(card), &sendpci, (*C.BYTE)(&cmd[0]), C.DWORD(len(cmd)), &recvpci, (*C.BYTE)(&rsp[0]), &rspLen)
+
+	return uint32(rspLen), Error(r)
+}
+
+func scardControl(card uintptr, ioctl uint32, in, out []byte) (uint32, Error) {
+	var ptrIn C.LPCVOID
+	var outLen = C.DWORD(len(out))
+
+	if len(in) != 0 {
+		ptrIn = C.LPCVOID(unsafe.Pointer(&in[0]))
+	}
+
+	r := C.SCardControl(C.SCARDHANDLE(card), C.DWORD(ioctl), ptrIn, C.DWORD(len(in)), (C.LPVOID)(unsafe.Pointer(&out[0])), C.DWORD(len(out)), &outLen)
+	return uint32(outLen), Error(r)
+}
+
+func scardGetAttrib(card uintptr, id Attrib, buf []byte) (uint32, Error) {
+	var ptr C.LPBYTE
+
+	if len(buf) != 0 {
+		ptr = C.LPBYTE(unsafe.Pointer(&buf[0]))
+	}
+
+	bufLen := C.DWORD(len(buf))
+	r := C.SCardGetAttrib(C.SCARDHANDLE(card), C.DWORD(id), ptr, &bufLen)
+
+	return uint32(bufLen), Error(r)
+}
+
+func scardSetAttrib(card uintptr, id Attrib, buf []byte) Error {
+	r := C.SCardSetAttrib(C.SCARDHANDLE(card), C.DWORD(id), (*C.BYTE)(unsafe.Pointer(&buf[0])), C.DWORD(len(buf)))
+	return Error(r)
+}
+
+type strbuf []byte
+
+func encodestr(s string) (strbuf, error) {
+	buf := strbuf(s + "\x00")
+	return buf, nil
+}
+
+func decodestr(buf strbuf) string {
+	if len(buf) == 0 {
+		return ""
+	}
+
+	if buf[len(buf)-1] == 0 {
+		buf = buf[:len(buf)-1]
+	}
+
+	return string(buf)
+}
+
+type scardReaderState struct {
+	szReader       uintptr
+	pvUserData     uintptr
+	dwCurrentState uintptr
+	dwEventState   uintptr
+	cbAtr          uintptr
+	rgbAtr         [33]byte
+}
+
+var pinned = map[string]*strbuf{}
+
+func (rs *ReaderState) toSys() (scardReaderState, error) {
+	var sys scardReaderState
+
+	creader, err := encodestr(rs.Reader)
+	if err != nil {
+		return scardReaderState{}, err
+	}
+	pinned[rs.Reader] = &creader
+	sys.szReader = uintptr(creader.ptr())
+	sys.dwCurrentState = uintptr(rs.CurrentState)
+	sys.cbAtr = uintptr(len(rs.Atr))
+	for i, v := range rs.Atr {
+		sys.rgbAtr[i] = byte(v)
+	}
+	return sys, nil
+}
+
+func (rs *ReaderState) update(sys *scardReaderState) {
+	rs.EventState = StateFlag(sys.dwEventState)
+	if sys.cbAtr > 0 {
+		rs.Atr = make([]byte, int(sys.cbAtr))
+		for i := 0; i < int(sys.cbAtr); i++ {
+			rs.Atr[i] = byte(sys.rgbAtr[i])
+		}
+	}
+}
--- a/vendor/github.com/ebfe/scard/scard_windows.go
+++ b/vendor/github.com/ebfe/scard/scard_windows.go
@@ -0,0 +1,221 @@
+package scard
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+)
+
+var (
+	modwinscard = syscall.NewLazyDLL("winscard.dll")
+
+	procEstablishContext = modwinscard.NewProc("SCardEstablishContext")
+	procReleaseContext   = modwinscard.NewProc("SCardReleaseContext")
+	procIsValidContext   = modwinscard.NewProc("SCardIsValidContext")
+	procCancel           = modwinscard.NewProc("SCardCancel")
+	procListReaders      = modwinscard.NewProc("SCardListReadersW")
+	procListReaderGroups = modwinscard.NewProc("SCardListReaderGroupsW")
+	procGetStatusChange  = modwinscard.NewProc("SCardGetStatusChangeW")
+	procConnect          = modwinscard.NewProc("SCardConnectW")
+	procDisconnect       = modwinscard.NewProc("SCardDisconnect")
+	procReconnect        = modwinscard.NewProc("SCardReconnect")
+	procBeginTransaction = modwinscard.NewProc("SCardBeginTransaction")
+	procEndTransaction   = modwinscard.NewProc("SCardEndTransaction")
+	procStatus           = modwinscard.NewProc("SCardStatusW")
+	procTransmit         = modwinscard.NewProc("SCardTransmit")
+	procControl          = modwinscard.NewProc("SCardControl")
+	procGetAttrib        = modwinscard.NewProc("SCardGetAttrib")
+	procSetAttrib        = modwinscard.NewProc("SCardSetAttrib")
+
+	dataT0Pci = modwinscard.NewProc("g_rgSCardT0Pci")
+	dataT1Pci = modwinscard.NewProc("g_rgSCardT1Pci")
+)
+
+var scardIoReqT0 uintptr
+var scardIoReqT1 uintptr
+
+func init() {
+	if err := dataT0Pci.Find(); err != nil {
+		panic(err)
+	}
+	scardIoReqT0 = dataT0Pci.Addr()
+	if err := dataT1Pci.Find(); err != nil {
+		panic(err)
+	}
+	scardIoReqT1 = dataT1Pci.Addr()
+}
+
+func (e Error) Error() string {
+	err := syscall.Errno(e)
+	return fmt.Sprintf("scard: error(%x): %s", uintptr(e), err.Error())
+}
+
+func scardEstablishContext(scope Scope, reserved1, reserved2 uintptr) (uintptr, Error) {
+	var ctx uintptr
+	r, _, _ := procEstablishContext.Call(uintptr(scope), reserved1, reserved2, uintptr(unsafe.Pointer(&ctx)))
+	return ctx, Error(r)
+}
+
+func scardIsValidContext(ctx uintptr) Error {
+	r, _, _ := procIsValidContext.Call(ctx)
+	return Error(r)
+}
+
+func scardCancel(ctx uintptr) Error {
+	r, _, _ := procCancel.Call(ctx)
+	return Error(r)
+}
+
+func scardReleaseContext(ctx uintptr) Error {
+	r, _, _ := procReleaseContext.Call(ctx)
+	return Error(r)
+}
+
+func scardListReaders(ctx uintptr, groups, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := uint32(bufLen)
+	r, _, _ := procListReaders.Call(ctx, uintptr(groups), uintptr(buf), uintptr(unsafe.Pointer(&dwBufLen)))
+	return dwBufLen, Error(r)
+}
+
+func scardListReaderGroups(ctx uintptr, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
+	dwBufLen := uint32(bufLen)
+	r, _, _ := procListReaderGroups.Call(ctx, uintptr(buf), uintptr(unsafe.Pointer(&dwBufLen)))
+	return dwBufLen, Error(r)
+}
+
+func scardGetStatusChange(ctx uintptr, timeout uint32, states []scardReaderState) Error {
+	r, _, _ := procGetStatusChange.Call(ctx, uintptr(timeout), uintptr(unsafe.Pointer(&states[0])), uintptr(len(states)))
+	return Error(r)
+}
+
+func scardConnect(ctx uintptr, reader unsafe.Pointer, shareMode ShareMode, proto Protocol) (uintptr, Protocol, Error) {
+	var handle uintptr
+	var activeProto uint32
+
+	r, _, _ := procConnect.Call(ctx, uintptr(reader), uintptr(shareMode), uintptr(proto), uintptr(unsafe.Pointer(&handle)), uintptr(unsafe.Pointer(&activeProto)))
+
+	return handle, Protocol(activeProto), Error(r)
+}
+
+func scardDisconnect(card uintptr, d Disposition) Error {
+	r, _, _ := procDisconnect.Call(card, uintptr(d))
+	return Error(r)
+}
+
+func scardReconnect(card uintptr, mode ShareMode, proto Protocol, disp Disposition) (Protocol, Error) {
+	var activeProtocol uint32
+	r, _, _ := procReconnect.Call(card, uintptr(mode), uintptr(proto), uintptr(disp), uintptr(unsafe.Pointer(&activeProtocol)))
+	return Protocol(activeProtocol), Error(r)
+}
+
+func scardBeginTransaction(card uintptr) Error {
+	r, _, _ := procBeginTransaction.Call(card)
+	return Error(r)
+}
+
+func scardEndTransaction(card uintptr, disp Disposition) Error {
+	r, _, _ := procEndTransaction.Call(card, uintptr(disp))
+	return Error(r)
+}
+
+func scardCardStatus(card uintptr) (string, State, Protocol, []byte, Error) {
+	var state, proto uint32
+	var atr [maxAtrSize]byte
+	var atrLen = uint32(len(atr))
+
+	reader := make(strbuf, maxReadername+1)
+	readerLen := uint32(len(reader))
+
+	r, _, _ := procStatus.Call(card, uintptr(reader.ptr()), uintptr(unsafe.Pointer(&readerLen)), uintptr(unsafe.Pointer(&state)), uintptr(unsafe.Pointer(&proto)), uintptr(unsafe.Pointer(&atr[0])), uintptr(unsafe.Pointer(&atrLen)))
+
+	return decodestr(reader[:readerLen]), State(state), Protocol(proto), atr[:atrLen], Error(r)
+}
+
+func scardTransmit(card uintptr, proto Protocol, cmd []byte, rsp []byte) (uint32, Error) {
+	var sendpci uintptr
+	var rspLen = uint32(len(rsp))
+
+	switch proto {
+	case ProtocolT0:
+		sendpci = scardIoReqT0
+	case ProtocolT1:
+		sendpci = scardIoReqT1
+	default:
+		panic("unknown protocol")
+	}
+
+	r, _, _ := procTransmit.Call(card, sendpci, uintptr(unsafe.Pointer(&cmd[0])), uintptr(len(cmd)), uintptr(0), uintptr(unsafe.Pointer(&rsp[0])), uintptr(unsafe.Pointer(&rspLen)))
+
+	return rspLen, Error(r)
+}
+
+func scardControl(card uintptr, ioctl uint32, in, out []byte) (uint32, Error) {
+	var ptrIn uintptr
+	var outLen = uint32(len(out))
+
+	if len(in) != 0 {
+		ptrIn = uintptr(unsafe.Pointer(&in[0]))
+	}
+
+	r, _, _ := procControl.Call(card, uintptr(ioctl), ptrIn, uintptr(len(in)), uintptr(unsafe.Pointer(&out[0])), uintptr(len(out)), uintptr(unsafe.Pointer(&outLen)))
+	return outLen, Error(r)
+}
+
+func scardGetAttrib(card uintptr, id Attrib, buf []byte) (uint32, Error) {
+	var ptr uintptr
+
+	if len(buf) != 0 {
+		ptr = uintptr(unsafe.Pointer(&buf[0]))
+	}
+
+	bufLen := uint32(len(buf))
+	r, _, _ := procGetAttrib.Call(card, uintptr(id), ptr, uintptr(unsafe.Pointer(&bufLen)))
+
+	return bufLen, Error(r)
+}
+
+func scardSetAttrib(card uintptr, id Attrib, buf []byte) Error {
+	r, _, _ := procSetAttrib.Call(card, uintptr(id), uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)))
+	return Error(r)
+}
+
+type scardReaderState struct {
+	szReader       uintptr
+	pvUserData     uintptr
+	dwCurrentState uint32
+	dwEventState   uint32
+	cbAtr          uint32
+	rgbAtr         [36]byte
+}
+
+func (rs *ReaderState) toSys() (scardReaderState, error) {
+	var sys scardReaderState
+	creader, err := encodestr(rs.Reader)
+	if err != nil {
+		return scardReaderState{}, err
+	}
+	sys.szReader = uintptr(creader.ptr())
+	sys.dwCurrentState = uint32(rs.CurrentState)
+	sys.cbAtr = uint32(len(rs.Atr))
+	copy(sys.rgbAtr[:], rs.Atr)
+	return sys, nil
+}
+
+func (rs *ReaderState) update(sys *scardReaderState) {
+	rs.EventState = StateFlag(sys.dwEventState)
+	if sys.cbAtr > 0 {
+		rs.Atr = make([]byte, int(sys.cbAtr))
+		copy(rs.Atr, sys.rgbAtr[:])
+	}
+}
+
+type strbuf []uint16
+
+func encodestr(s string) (strbuf, error) {
+	utf16, err := syscall.UTF16FromString(s)
+	return strbuf(utf16), err
+}
+
+func decodestr(buf strbuf) string {
+	return syscall.UTF16ToString(buf)
+}
--- a/vendor/github.com/ebfe/scard/zconst.go
+++ b/vendor/github.com/ebfe/scard/zconst.go
@@ -0,0 +1,190 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs -- -I /usr/include/PCSC/ const.go
+
+package scard
+
+type Attrib uint32
+
+const (
+	AttrVendorName           Attrib = 0x10100
+	AttrVendorIfdType        Attrib = 0x10101
+	AttrVendorIfdVersion     Attrib = 0x10102
+	AttrVendorIfdSerialNo    Attrib = 0x10103
+	AttrChannelId            Attrib = 0x20110
+	AttrAsyncProtocolTypes   Attrib = 0x30120
+	AttrDefaultClk           Attrib = 0x30121
+	AttrMaxClk               Attrib = 0x30122
+	AttrDefaultDataRate      Attrib = 0x30123
+	AttrMaxDataRate          Attrib = 0x30124
+	AttrMaxIfsd              Attrib = 0x30125
+	AttrSyncProtocolTypes    Attrib = 0x30126
+	AttrPowerMgmtSupport     Attrib = 0x40131
+	AttrUserToCardAuthDevice Attrib = 0x50140
+	AttrUserAuthInputDevice  Attrib = 0x50142
+	AttrCharacteristics      Attrib = 0x60150
+	AttrCurrentProtocolType  Attrib = 0x80201
+	AttrCurrentClk           Attrib = 0x80202
+	AttrCurrentF             Attrib = 0x80203
+	AttrCurrentD             Attrib = 0x80204
+	AttrCurrentN             Attrib = 0x80205
+	AttrCurrentW             Attrib = 0x80206
+	AttrCurrentIfsc          Attrib = 0x80207
+	AttrCurrentIfsd          Attrib = 0x80208
+	AttrCurrentBwt           Attrib = 0x80209
+	AttrCurrentCwt           Attrib = 0x8020a
+	AttrCurrentEbcEncoding   Attrib = 0x8020b
+	AttrExtendedBwt          Attrib = 0x8020c
+	AttrIccPresence          Attrib = 0x90300
+	AttrIccInterfaceStatus   Attrib = 0x90301
+	AttrCurrentIoState       Attrib = 0x90302
+	AttrAtrString            Attrib = 0x90303
+	AttrIccTypePerAtr        Attrib = 0x90304
+	AttrEscReset             Attrib = 0x7a000
+	AttrEscCancel            Attrib = 0x7a003
+	AttrEscAuthrequest       Attrib = 0x7a005
+	AttrMaxinput             Attrib = 0x7a007
+	AttrDeviceUnit           Attrib = 0x7fff0001
+	AttrDeviceInUse          Attrib = 0x7fff0002
+	AttrDeviceFriendlyName   Attrib = 0x7fff0003
+	AttrDeviceSystemName     Attrib = 0x7fff0004
+	AttrSupressT1IfsRequest  Attrib = 0x7fff0007
+)
+
+type Error uint32
+
+const (
+	ErrSuccess                Error = 0x0
+	ErrInternalError          Error = 0x80100001
+	ErrCancelled              Error = 0x80100002
+	ErrInvalidHandle          Error = 0x80100003
+	ErrInvalidParameter       Error = 0x80100004
+	ErrInvalidTarget          Error = 0x80100005
+	ErrNoMemory               Error = 0x80100006
+	ErrWaitedTooLong          Error = 0x80100007
+	ErrInsufficientBuffer     Error = 0x80100008
+	ErrUnknownReader          Error = 0x80100009
+	ErrTimeout                Error = 0x8010000a
+	ErrSharingViolation       Error = 0x8010000b
+	ErrNoSmartcard            Error = 0x8010000c
+	ErrUnknownCard            Error = 0x8010000d
+	ErrCantDispose            Error = 0x8010000e
+	ErrProtoMismatch          Error = 0x8010000f
+	ErrNotReady               Error = 0x80100010
+	ErrInvalidValue           Error = 0x80100011
+	ErrSystemCancelled        Error = 0x80100012
+	ErrCommError              Error = 0x80100013
+	ErrUnknownError           Error = 0x80100014
+	ErrInvalidAtr             Error = 0x80100015
+	ErrNotTransacted          Error = 0x80100016
+	ErrReaderUnavailable      Error = 0x80100017
+	ErrShutdown               Error = 0x80100018
+	ErrPciTooSmall            Error = 0x80100019
+	ErrReaderUnsupported      Error = 0x8010001a
+	ErrDuplicateReader        Error = 0x8010001b
+	ErrCardUnsupported        Error = 0x8010001c
+	ErrNoService              Error = 0x8010001d
+	ErrServiceStopped         Error = 0x8010001e
+	ErrUnexpected             Error = 0x8010001f
+	ErrUnsupportedFeature     Error = 0x8010001f
+	ErrIccInstallation        Error = 0x80100020
+	ErrIccCreateorder         Error = 0x80100021
+	ErrFileNotFound           Error = 0x80100024
+	ErrNoDir                  Error = 0x80100025
+	ErrNoFile                 Error = 0x80100026
+	ErrNoAccess               Error = 0x80100027
+	ErrWriteTooMany           Error = 0x80100028
+	ErrBadSeek                Error = 0x80100029
+	ErrInvalidChv             Error = 0x8010002a
+	ErrUnknownResMng          Error = 0x8010002b
+	ErrNoSuchCertificate      Error = 0x8010002c
+	ErrCertificateUnavailable Error = 0x8010002d
+	ErrNoReadersAvailable     Error = 0x8010002e
+	ErrCommDataLost           Error = 0x8010002f
+	ErrNoKeyContainer         Error = 0x80100030
+	ErrServerTooBusy          Error = 0x80100031
+	ErrUnsupportedCard        Error = 0x80100065
+	ErrUnresponsiveCard       Error = 0x80100066
+	ErrUnpoweredCard          Error = 0x80100067
+	ErrResetCard              Error = 0x80100068
+	ErrRemovedCard            Error = 0x80100069
+	ErrSecurityViolation      Error = 0x8010006a
+	ErrWrongChv               Error = 0x8010006b
+	ErrChvBlocked             Error = 0x8010006c
+	ErrEof                    Error = 0x8010006d
+	ErrCancelledByUser        Error = 0x8010006e
+	ErrCardNotAuthenticated   Error = 0x8010006f
+)
+
+type Protocol uint32
+
+const (
+	ProtocolUndefined Protocol = 0x0
+	ProtocolT0        Protocol = 0x1
+	ProtocolT1        Protocol = 0x2
+	ProtocolAny       Protocol = ProtocolT0 | ProtocolT1
+)
+
+type ShareMode uint32
+
+const (
+	ShareExclusive ShareMode = 0x1
+	ShareShared    ShareMode = 0x2
+	ShareDirect    ShareMode = 0x3
+)
+
+type Disposition uint32
+
+const (
+	LeaveCard   Disposition = 0x0
+	ResetCard   Disposition = 0x1
+	UnpowerCard Disposition = 0x2
+	EjectCard   Disposition = 0x3
+)
+
+type Scope uint32
+
+const (
+	ScopeUser     Scope = 0x0
+	ScopeTerminal Scope = 0x1
+	ScopeSystem   Scope = 0x2
+)
+
+type State uint32
+
+const (
+	Unknown    State = 0x1
+	Absent     State = 0x2
+	Present    State = 0x4
+	Swallowed  State = 0x8
+	Powered    State = 0x10
+	Negotiable State = 0x20
+	Specific   State = 0x40
+)
+
+type StateFlag uint32
+
+const (
+	StateUnaware     StateFlag = 0x0
+	StateIgnore      StateFlag = 0x1
+	StateChanged     StateFlag = 0x2
+	StateUnknown     StateFlag = 0x4
+	StateUnavailable StateFlag = 0x8
+	StateEmpty       StateFlag = 0x10
+	StatePresent     StateFlag = 0x20
+	StateAtrmatch    StateFlag = 0x40
+	StateExclusive   StateFlag = 0x80
+	StateInuse       StateFlag = 0x100
+	StateMute        StateFlag = 0x200
+	StateUnpowered   StateFlag = 0x400
+)
+
+const (
+	maxBufferSize         = 0x108
+	maxBufferSizeExtended = 0x1000c
+	maxReadername         = 0x80
+	maxAtrSize            = 0x21
+)
+
+const (
+	infiniteTimeout = 0xffffffff
+)