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// +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])
}
}
}
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