220 lines
6.7 KiB
Go
220 lines
6.7 KiB
Go
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package scard
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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var (
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modwinscard = syscall.NewLazyDLL("winscard.dll")
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procEstablishContext = modwinscard.NewProc("SCardEstablishContext")
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procReleaseContext = modwinscard.NewProc("SCardReleaseContext")
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procIsValidContext = modwinscard.NewProc("SCardIsValidContext")
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procCancel = modwinscard.NewProc("SCardCancel")
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procListReaders = modwinscard.NewProc("SCardListReadersW")
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procListReaderGroups = modwinscard.NewProc("SCardListReaderGroupsW")
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procGetStatusChange = modwinscard.NewProc("SCardGetStatusChangeW")
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procConnect = modwinscard.NewProc("SCardConnectW")
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procDisconnect = modwinscard.NewProc("SCardDisconnect")
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procReconnect = modwinscard.NewProc("SCardReconnect")
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procBeginTransaction = modwinscard.NewProc("SCardBeginTransaction")
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procEndTransaction = modwinscard.NewProc("SCardEndTransaction")
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procStatus = modwinscard.NewProc("SCardStatusW")
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procTransmit = modwinscard.NewProc("SCardTransmit")
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procControl = modwinscard.NewProc("SCardControl")
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procGetAttrib = modwinscard.NewProc("SCardGetAttrib")
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procSetAttrib = modwinscard.NewProc("SCardSetAttrib")
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dataT0Pci = modwinscard.NewProc("g_rgSCardT0Pci")
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dataT1Pci = modwinscard.NewProc("g_rgSCardT1Pci")
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)
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var scardIoReqT0 uintptr
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var scardIoReqT1 uintptr
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func init() {
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if err := dataT0Pci.Find(); err != nil {
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panic(err)
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}
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scardIoReqT0 = dataT0Pci.Addr()
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if err := dataT1Pci.Find(); err != nil {
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panic(err)
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}
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scardIoReqT1 = dataT1Pci.Addr()
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}
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func (e Error) Error() string {
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err := syscall.Errno(e)
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return fmt.Sprintf("scard: error(%x): %s", uintptr(e), err.Error())
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}
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func scardEstablishContext(scope Scope, reserved1, reserved2 uintptr) (uintptr, Error) {
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var ctx uintptr
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r, _, _ := procEstablishContext.Call(uintptr(scope), reserved1, reserved2, uintptr(unsafe.Pointer(&ctx)))
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return ctx, Error(r)
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}
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func scardIsValidContext(ctx uintptr) Error {
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r, _, _ := procIsValidContext.Call(ctx)
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return Error(r)
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}
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func scardCancel(ctx uintptr) Error {
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r, _, _ := procCancel.Call(ctx)
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return Error(r)
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}
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func scardReleaseContext(ctx uintptr) Error {
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r, _, _ := procReleaseContext.Call(ctx)
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return Error(r)
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}
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func scardListReaders(ctx uintptr, groups, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
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dwBufLen := uint32(bufLen)
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r, _, _ := procListReaders.Call(ctx, uintptr(groups), uintptr(buf), uintptr(unsafe.Pointer(&dwBufLen)))
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return dwBufLen, Error(r)
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}
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func scardListReaderGroups(ctx uintptr, buf unsafe.Pointer, bufLen uint32) (uint32, Error) {
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dwBufLen := uint32(bufLen)
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r, _, _ := procListReaderGroups.Call(ctx, uintptr(buf), uintptr(unsafe.Pointer(&dwBufLen)))
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return dwBufLen, Error(r)
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}
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func scardGetStatusChange(ctx uintptr, timeout uint32, states []scardReaderState) Error {
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r, _, _ := procGetStatusChange.Call(ctx, uintptr(timeout), uintptr(unsafe.Pointer(&states[0])), uintptr(len(states)))
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return Error(r)
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}
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func scardConnect(ctx uintptr, reader unsafe.Pointer, shareMode ShareMode, proto Protocol) (uintptr, Protocol, Error) {
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var handle uintptr
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var activeProto uint32
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r, _, _ := procConnect.Call(ctx, uintptr(reader), uintptr(shareMode), uintptr(proto), uintptr(unsafe.Pointer(&handle)), uintptr(unsafe.Pointer(&activeProto)))
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return handle, Protocol(activeProto), Error(r)
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}
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func scardDisconnect(card uintptr, d Disposition) Error {
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r, _, _ := procDisconnect.Call(card, uintptr(d))
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return Error(r)
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}
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func scardReconnect(card uintptr, mode ShareMode, proto Protocol, disp Disposition) (Protocol, Error) {
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var activeProtocol uint32
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r, _, _ := procReconnect.Call(card, uintptr(mode), uintptr(proto), uintptr(disp), uintptr(unsafe.Pointer(&activeProtocol)))
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return Protocol(activeProtocol), Error(r)
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}
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func scardBeginTransaction(card uintptr) Error {
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r, _, _ := procBeginTransaction.Call(card)
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return Error(r)
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}
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func scardEndTransaction(card uintptr, disp Disposition) Error {
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r, _, _ := procEndTransaction.Call(card, uintptr(disp))
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return Error(r)
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}
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func scardCardStatus(card uintptr, readerBuf strbuf, atrBuf []byte) (uint32, State, Protocol, uint32, Error) {
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var state, proto uint32
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var atrLen = uint32(len(atrBuf))
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readerLen := uint32(len(readerBuf))
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r, _, _ := procStatus.Call(card, uintptr(readerBuf.ptr()), uintptr(unsafe.Pointer(&readerLen)), uintptr(unsafe.Pointer(&state)), uintptr(unsafe.Pointer(&proto)), uintptr(unsafe.Pointer(&atrBuf[0])), uintptr(unsafe.Pointer(&atrLen)))
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return readerLen, State(state), Protocol(proto), atrLen, Error(r)
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}
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func scardTransmit(card uintptr, proto Protocol, cmd []byte, rsp []byte) (uint32, Error) {
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var sendpci uintptr
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var rspLen = uint32(len(rsp))
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switch proto {
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case ProtocolT0:
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sendpci = scardIoReqT0
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case ProtocolT1:
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sendpci = scardIoReqT1
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default:
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panic("unknown protocol")
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}
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r, _, _ := procTransmit.Call(card, sendpci, uintptr(unsafe.Pointer(&cmd[0])), uintptr(len(cmd)), uintptr(0), uintptr(unsafe.Pointer(&rsp[0])), uintptr(unsafe.Pointer(&rspLen)))
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return rspLen, Error(r)
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}
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func scardControl(card uintptr, ioctl uint32, in, out []byte) (uint32, Error) {
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var ptrIn uintptr
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var outLen = uint32(len(out))
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if len(in) != 0 {
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ptrIn = uintptr(unsafe.Pointer(&in[0]))
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}
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r, _, _ := procControl.Call(card, uintptr(ioctl), ptrIn, uintptr(len(in)), uintptr(unsafe.Pointer(&out[0])), uintptr(len(out)), uintptr(unsafe.Pointer(&outLen)))
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return outLen, Error(r)
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}
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func scardGetAttrib(card uintptr, id Attrib, buf []byte) (uint32, Error) {
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var ptr uintptr
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if len(buf) != 0 {
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ptr = uintptr(unsafe.Pointer(&buf[0]))
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}
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bufLen := uint32(len(buf))
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r, _, _ := procGetAttrib.Call(card, uintptr(id), ptr, uintptr(unsafe.Pointer(&bufLen)))
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return bufLen, Error(r)
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}
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func scardSetAttrib(card uintptr, id Attrib, buf []byte) Error {
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r, _, _ := procSetAttrib.Call(card, uintptr(id), uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)))
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return Error(r)
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}
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type scardReaderState struct {
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szReader uintptr
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pvUserData uintptr
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dwCurrentState uint32
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dwEventState uint32
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cbAtr uint32
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rgbAtr [36]byte
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}
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func (rs *ReaderState) toSys() (scardReaderState, error) {
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var sys scardReaderState
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creader, err := encodestr(rs.Reader)
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if err != nil {
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return scardReaderState{}, err
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}
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sys.szReader = uintptr(creader.ptr())
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sys.dwCurrentState = uint32(rs.CurrentState)
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sys.cbAtr = uint32(len(rs.Atr))
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copy(sys.rgbAtr[:], rs.Atr)
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return sys, nil
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}
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func (rs *ReaderState) update(sys *scardReaderState) {
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rs.EventState = StateFlag(sys.dwEventState)
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if sys.cbAtr > 0 {
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rs.Atr = make([]byte, int(sys.cbAtr))
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copy(rs.Atr, sys.rgbAtr[:])
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}
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}
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type strbuf []uint16
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func encodestr(s string) (strbuf, error) {
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utf16, err := syscall.UTF16FromString(s)
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return strbuf(utf16), err
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}
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func decodestr(buf strbuf) string {
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return syscall.UTF16ToString(buf)
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}
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