#! /usr/bin/python3

"""
#    Display PC/SC functions arguments
#    Copyright (C) 2011-2021  Ludovic Rousseau
"""
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
import signal
import time
try:
    # for Python3
    from queue import Queue
except ImportError:
    # for Python2
    from Queue import Queue
from threading import Thread
from operator import attrgetter


def hexdump(data_buffer, width=16):
    def quotechars(data_buffer):
        return ''.join(['.', chr(c)][c > 31 and c < 127] for c in data_buffer)

    result = []
    offset = 0
    while data_buffer:
        line = data_buffer[:width]
        data_buffer = data_buffer[width:]
        hex_dump = " ".join("%02X" % c for c in line)
        ascii_dump = quotechars(line)
        if len(line) < width:
            hex_dump += "   " * (width - len(line))
        result.append("%04X %s %s" % (offset, hex_dump, ascii_dump))
        offset += width
    return result


def _parse_rv(line):
    """ parse the return value line """
    if line == "":
        raise Exception("Empty line (application exited?)")

    (direction, sec, usec, function, code, rv) = line.split('|')
    if direction != '<':
        raise Exception("Wrong line:", line)

    sec = int(sec)
    usec = int(usec)

    return (code, rv, sec, usec)


class SpyExit(Exception):
    pass

class StatRecord(object):
    """ Record to store statistics """

    def __init__(self, name):
        self.name = name
        self.executions = list()
        self.total_time = 0
        self.occurences = 0

    def __repr__(self):
        return self.name + ": " + repr(self.executions)


class PCSCspy(object):
    """ PC/SC spy """

    color_red = "\x1b[01;31m"
    color_green = "\x1b[32m"
    color_blue = "\x1b[34m"
    color_magenta = "\x1b[35m"
    color_normal = "\x1b[0m"

    def get_line(self):
        line = self.queue.get()
        if line == "EXIT":
            raise SpyExit()
        return line

    def _log_rv(self):
        """ log the return value """
        line = self.get_line()
        (code, rv, sec, usec) = _parse_rv(line)
        delta_sec = sec - self.sec
        delta_usec = usec - self.usec
        if delta_usec < 0:
            delta_sec -= 1
            delta_usec += 1000000
        if self.diffable:
            time = " [??.??]"
        else:
            time = " [%d.%06d]" % (delta_sec, delta_usec)
        self.execution_time = delta_sec + delta_usec / 1000000.

        rvs = {
            0x00000000: "SCARD_S_SUCCESS",
            0x80100001: "SCARD_F_INTERNAL_ERROR",
            0x80100002: "SCARD_E_CANCELLED",
            0x80100003: "SCARD_E_INVALID_HANDLE",
            0x80100004: "SCARD_E_INVALID_PARAMETER",
            0x80100005: "SCARD_E_INVALID_TARGET",
            0x80100006: "SCARD_E_NO_MEMORY",
            0x80100007: "SCARD_F_WAITED_TOO_LONG",
            0x80100008: "SCARD_E_INSUFFICIENT_BUFFER",
            0x80100009: "SCARD_E_UNKNOWN_READER",
            0x8010000A: "SCARD_E_TIMEOUT",
            0x8010000B: "SCARD_E_SHARING_VIOLATION",
            0x8010000C: "SCARD_E_NO_SMARTCARD",
            0x8010000D: "SCARD_E_UNKNOWN_CARD",
            0x8010000E: "SCARD_E_CANT_DISPOSE",
            0x8010000F: "SCARD_E_PROTO_MISMATCH",
            0x80100010: "SCARD_E_NOT_READY",
            0x80100011: "SCARD_E_INVALID_VALUE",
            0x80100012: "SCARD_E_SYSTEM_CANCELLED",
            0x80100013: "SCARD_F_COMM_ERROR",
            0x80100014: "SCARD_F_UNKNOWN_ERROR",
            0x80100015: "SCARD_E_INVALID_ATR",
            0x80100016: "SCARD_E_NOT_TRANSACTED",
            0x80100017: "SCARD_E_READER_UNAVAILABLE",
            0x80100018: "SCARD_P_SHUTDOWN",
            0x80100019: "SCARD_E_PCI_TOO_SMALL",
            0x8010001A: "SCARD_E_READER_UNSUPPORTED",
            0x8010001B: "SCARD_E_DUPLICATE_READER",
            0x8010001C: "SCARD_E_CARD_UNSUPPORTED",
            0x8010001D: "SCARD_E_NO_SERVICE",
            0x8010001E: "SCARD_E_SERVICE_STOPPED",
            0x8010001F: "SCARD_E_UNSUPPORTED_FEATURE",
            0x80100020: "SCARD_E_ICC_INSTALLATION",
            0x80100021: "SCARD_E_ICC_CREATEORDER",
            0x80100023: "SCARD_E_DIR_NOT_FOUND",
            0x80100024: "SCARD_E_FILE_NOT_FOUND",
            0x80100025: "SCARD_E_NO_DIR",
            0x80100026: "SCARD_E_NO_FILE",
            0x80100027: "SCARD_E_NO_ACCESS",
            0x80100028: "SCARD_E_WRITE_TOO_MANY",
            0x80100029: "SCARD_E_BAD_SEEK",
            0x8010002A: "SCARD_E_INVALID_CHV",
            0x8010002B: "SCARD_E_UNKNOWN_RES_MNG",
            0x8010002C: "SCARD_E_NO_SUCH_CERTIFICATE",
            0x8010002D: "SCARD_E_CERTIFICATE_UNAVAILABLE",
            0x8010002E: "SCARD_E_NO_READERS_AVAILABLE",
            0x8010002F: "SCARD_E_COMM_DATA_LOST",
            0x80100030: "SCARD_E_NO_KEY_CONTAINER",
            0x80100031: "SCARD_E_SERVER_TOO_BUSY",
            0x80100065: "SCARD_W_UNSUPPORTED_CARD",
            0x80100066: "SCARD_W_UNRESPONSIVE_CARD",
            0x80100067: "SCARD_W_UNPOWERED_CARD",
            0x80100068: "SCARD_W_RESET_CARD",
            0x80100069: "SCARD_W_REMOVED_CARD",
            0x8010006A: "SCARD_W_SECURITY_VIOLATION",
            0x8010006B: "SCARD_W_WRONG_CHV",
            0x8010006C: "SCARD_W_CHV_BLOCKED",
            0x8010006D: "SCARD_W_EOF",
            0x8010006E: "SCARD_W_CANCELLED_BY_USER",
            0x8010006F: "SCARD_W_CARD_NOT_AUTHENTICATED",
            }
        rv_text = rvs[int(rv, 16)]
        data = " => " + code + " (" + rv_text + " [" + rv + "]) "
        if "0x00000000" != rv:
            if self.color:
                print(self.indent + PCSCspy.color_red + data +
                        PCSCspy.color_normal + time)
            else:
                print(self.indent + data + time)
        else:
            print(self.indent + data + time)

        return rv_text

    def log_in(self, line):
        """ generic log for IN line """
        if self.color:
            print(self.indent + PCSCspy.color_green + " i " + line +
                    PCSCspy.color_normal)
        else:
            print(self.indent + " i " + line)

    def log_out(self, line):
        """ generic log for OUT line """
        if self.color:
            print(self.indent + PCSCspy.color_magenta + " o " + line +
                    PCSCspy.color_normal)
        else:
            print(self.indent + " o " + line)

    def log_in_multi(self, lines, padding=""):
        """ generic log for IN lines """
        for line in lines:
            self.log_in(padding + line)

    def log_out_multi(self, lines, padding=""):
        """ generic log for OUT lines """
        for line in lines:
            self.log_out(padding + line)

    def log_in_hCard(self):
        """ log hCard IN parameter """
        hCard = self.get_line()
        if self.diffable:
            self.log_in("hCard: 0x????")
        else:
            self.log_in("hCard: %s" % hCard)

    def log_in_scard_io_request(self):
        """ log SCARD_IO_REQUEST IN parameter """
        dwProtocol = self.get_line()
        if self.diffable:
            self.log_in("pioSendPci.dwProtocol: 0x????")
        else:
            self.log_in("pioSendPci.dwProtocol: %s" % dwProtocol)

        cbPciLength = self.get_line()
        if self.diffable:
            self.log_in("pioSendPci.cbPciLength: 0x????")
        else:
            self.log_in("pioSendPci.cbPciLength: %s" % cbPciLength)

    def log_in_hContext(self):
        """ log hContext IN parameter """
        hContext = self.get_line()
        if self.diffable:
            self.log_in("hContext: 0x????")
        else:
            self.log_in("hContext: %s" % hContext)

    def log_in_disposition(self):
        """ log dwDisposition IN parameter """
        dwDisposition = self.get_line()
        dispositions = {0: 'SCARD_LEAVE_CARD',
                        1: 'SCARD_RESET_CARD',
                        2: 'SCARD_UNPOWER_CARD',
                        3: 'SCARD_EJECT_CARD'}
        try:
            disposition = dispositions[int(dwDisposition, 16)]
        except KeyError:
            disposition = "UNKNOWN"
        self.log_in("dwDisposition: %s (%s)" % (disposition,
                                                dwDisposition))

    def log_in_attrid(self):
        """ log dwAttrId IN parameter """
        dwAttrId = self.get_line()
        attrids = {0x00010100: 'SCARD_ATTR_VENDOR_NAME',
                   0x00010102: 'SCARD_ATTR_VENDOR_IFD_VERSION',
                   0x00010103: 'SCARD_ATTR_VENDOR_IFD_SERIAL_NO',
                   0x0007A007: 'SCARD_ATTR_MAXINPUT',
                   0x00090300: 'SCARD_ATTR_ICC_PRESENCE',
                   0x00090301: 'SCARD_ATTR_ICC_INTERFACE_STATUS',
                   0x00090303: 'SCARD_ATTR_ATR_STRING',
                   0x7FFF0003: 'SCARD_ATTR_DEVICE_FRIENDLY_NAME_A',
                   0x7FFF0004: 'SCARD_ATTR_DEVICE_SYSTEM_NAME_A',
                   0x7FFF0005: 'SCARD_ATTR_DEVICE_FRIENDLY_NAME_W',
                   0x7FFF0006: 'SCARD_ATTR_DEVICE_SYSTEM_NAME_W'}
        try:
            attrid = attrids[int(dwAttrId, 16)]
        except KeyError:
            attrid = "UNKNOWN"
        self.log_in("dwAttrId: %s (%s)" % (attrid, dwAttrId))

    def log_in_dwShareMode(self):
        """ log dwShareMode IN parameter """
        dwShareMode = self.get_line()
        sharemodes = {1: 'SCARD_SHARE_EXCLUSIVE',
                      2: 'SCARD_SHARE_SHARED',
                      3: 'SCARD_SHARE_DIRECT'}
        try:
            sharemode = sharemodes[int(dwShareMode, 16)]
        except KeyError:
            sharemode = "UNKNOWN"
        self.log_in("dwShareMode: %s (%s)" % (sharemode, dwShareMode))

    def log_in_dwPreferredProtocols(self):
        """ log dwPreferredProtocols IN parameter """
        dwPreferredProtocols = self.get_line()
        PreferredProtocols = list()
        protocol = int(dwPreferredProtocols, 16)
        if protocol & 1:
            PreferredProtocols.append("T=0")
        if protocol & 2:
            PreferredProtocols.append("T=1")
        if protocol & 4:
            PreferredProtocols.append("RAW")
        if protocol & 8:
            PreferredProtocols.append("T=15")
        self.log_in("dwPreferredProtocols: %s (%s)" % (dwPreferredProtocols,
            ", ".join(PreferredProtocols)))

    def log_out_scard_io_request(self):
        """ log SCARD_IO_REQUEST OUT parameter """
        dwProtocol = self.get_line()
        if self.diffable:
            self.log_out("pioRecvPci.dwProtocol: 0x????")
        else:
            self.log_out("pioRecvPci.dwProtocol: %s" % dwProtocol)

        cbPciLength = self.get_line()
        if self.diffable:
            self.log_out("pioRecvPci.cbPciLength: 0x????")
        else:
            self.log_out("pioRecvPci.cbPciLength: %s" % cbPciLength)

    def log_out_dwActiveProtocol(self):
        """ log dwActiveProtocol OUT parameter """
        dwActiveProtocol = self.get_line()
        protocol = int(dwActiveProtocol, 16)
        if protocol & 1:
            protocol = "T=0"
        elif protocol & 2:
            protocol = "T=1"
        elif protocol & 4:
            protocol = "RAW"
        elif protocol & 8:
            protocol = "T=15"
        else:
            protocol = "UNKNOWN"
        self.log_out("dwActiveProtocol: %s (%s)" % (protocol,
            dwActiveProtocol))

    def log_out_hContext(self):
        """ log hContext OUT parameter """
        hContext = self.get_line()
        if self.diffable:
            self.log_out("hContext: 0x????")
        else:
            self.log_out("hContext: %s" % hContext)

    def _get_state(self, dwState):
        """ parse dwCurrentState and dwEventState """
        SCardStates = {0: 'SCARD_STATE_UNAWARE',
                       1: 'SCARD_STATE_IGNORE',
                       2: 'SCARD_STATE_CHANGED',
                       4: 'SCARD_STATE_UNKNOWN',
                       8: 'SCARD_STATE_UNAVAILABLE',
                       16: 'SCARD_STATE_EMPTY',
                       32: 'SCARD_STATE_PRESENT',
                       64: 'SCARD_STATE_ATRMATCH',
                       128: 'SCARD_STATE_EXCLUSIVE',
                       256: 'SCARD_STATE_INUSE',
                       512: 'SCARD_STATE_MUTE',
                       1024: 'SCARD_STATE_UNPOWERED'}

        state = list()
        for bit in SCardStates.keys():
            if dwState & bit:
                state.append(SCardStates[bit])
        return ", ".join(state)

    def log_dwCurrentState(self, log):
        """ log dwCurrentState IN/OUT parameter """
        dwCurrentState = self.get_line()
        state = self._get_state(int(dwCurrentState, 16))
        log(" dwCurrentState: %s (%s)" % (state, dwCurrentState))

    def log_dwEventState(self, log):
        """ log dwEventState IN/OUT parameter """
        dwEventState = self.get_line()
        state = self._get_state(int(dwEventState, 16))
        log(" dwEventState: %s (%s)" % (state, dwEventState))

    def log_dwControlCode(self):
        """ log SCardControl() dwControlCode """
        dwControlCode = self.get_line()

        try:
            code = self.ControlCodes[int(dwControlCode, 16)]
        except KeyError:
            code = "UNKNOWN"
        self.log_in("dwControlCode: %s (%s)" % (code, dwControlCode))

        return int(dwControlCode, 16)

    def log_in2(self, header):
        """ generic log IN parameter """
        data = self.get_line()
        if data.startswith("0x"):
            decimal = int(data, 16)
            self.log_in("%s %s (%d)" % (header, data, decimal))
        else:
            self.log_in("%s %s" % (header, data))
        return data

    def log_out2(self, header):
        """ generic log OUT parameter """
        data = self.get_line()
        if data.startswith("0x"):
            decimal = int(data, 16)
            self.log_out("%s %s (%d)" % (header, data, decimal))
        else:
            self.log_out("%s %s" % (header, data))
        return data

    def log_out_n_str(self, size_name, field_name):
        """ log multi-lines entries """
        data = self.get_line()
        self.log_out("%s %s" % (size_name, data))
        size = int(data, 16)
        data_read = 0
        if 0 == size:
            data = self.get_line()
            self.log_out("%s %s" % (field_name, data))
        else:
            while data_read < size:
                data = self.get_line()
                self.log_out("%s %s" % (field_name, data))
                if data == 'NULL':
                    break
                data_read += len(data) + 1

    def log_name(self, name):
        """ log function name """
        if self.color:
            print(self.indent + PCSCspy.color_blue + name +
                    PCSCspy.color_normal)
        else:
            print(self.indent + name)

    def _log_readers(self, readers, direction):
        """ log SCARD_READERSTATE structure """
        log = self.log_in2
        raw_log = self.log_in
        if (direction == "out"):
            log = self.log_out2
            raw_log = self.log_out
        for index in range(readers):
            log("szReader:")
            self.log_dwCurrentState(raw_log)
            self.log_dwEventState(raw_log)
            log(" Atr length:")
            log(" Atr:")

    def log_buffer(self, field, direction):
        log = self.log_in
        log_multi = self.log_in_multi
        if direction == "out":
            log = self.log_out
            log_multi = self.log_out_multi

        hex_buffer = self.get_line()
        log(field)
        if hex_buffer == "NULL":
            log(" NULL")
        elif hex_buffer != "":
            int_buffer = [int(x, 16) for x in hex_buffer.split(" ")]
            formated_buffer = hexdump(int_buffer)
            log_multi(formated_buffer, " ")

        return hex_buffer

    def _SCardEstablishContext(self):
        """ SCardEstablishContext """
        self.log_name("SCardEstablishContext")
        dwScope = self.get_line()
        scopes = {0: 'SCARD_SCOPE_USER',
                  1: 'SCARD_SCOPE_TERMINAL',
                  2: 'SCARD_SCOPE_SYSTEM'}
        self.log_in("dwScope: %s (%s)" % (scopes[int(dwScope, 16)], dwScope))
        self.log_out_hContext()
        self._log_rv()

    def _SCardIsValidContext(self):
        """ SCardIsValidContext """
        self.log_name("SCardIsValidContext")
        self.log_in_hContext()
        self._log_rv()

    def _SCardReleaseContext(self):
        """ SCardReleaseContext """
        self.log_name("SCardReleaseContext")
        self.log_in_hContext()
        self._log_rv()

    def _SCardListReaders(self):
        """ SCardListReaders """
        self.log_name("SCardListReaders")
        self.log_in_hContext()
        self.log_in2("mszGroups:")
        self.log_out_n_str("pcchReaders:", "mszReaders:")
        self._log_rv()

    def _SCardListReaderGroups(self):
        """ SCardListReaderGroups """
        self.log_name("SCardListReaderGroups")
        self.log_in_hContext()
        self.log_in2("pcchGroups:")
        self.log_out_n_str("pcchGroups:", "mszGroups:")
        self._log_rv()

    def _SCardGetStatusChange(self):
        """ SCardGetStatusChange """
        self.log_name("SCardGetStatusChange")
        self.log_in_hContext()
        self.log_in2("dwTimeout:")
        readers = int(self.get_line(), 16)
        self.log_in("cReaders: %d" % readers)
        self._log_readers(readers, direction="in")
        self._log_readers(readers, direction="out")
        self._log_rv()

    def _SCardFreeMemory(self):
        """ SCardFreeMemory """
        self.log_name("SCardFreeMemory")
        self.log_in_hContext()
        self.log_in2("pvMem:")
        self._log_rv()

    def _SCardConnect(self):
        """ SCardConnect """
        self.log_name("SCardConnect")
        self.log_in_hContext()
        self.log_in2("szReader")
        self.log_in_dwShareMode()
        self.log_in_dwPreferredProtocols()
        self.log_in2("phCard")
        self.log_in2("pdwActiveProtocol")
        self.log_out2("phCard")
        self.log_out_dwActiveProtocol()
        self._log_rv()

    def _SCardTransmit(self):
        """ SCardTransmit """
        self.log_name("SCardTransmit")
        self.log_in_hCard()
        self.log_in_scard_io_request()
        self.log_in2("bSendLength")
        self.log_buffer("bSendBuffer", "in")
        self.log_out_scard_io_request()
        self.log_out2("bRecvLength")
        self.log_buffer("bRecvBuffer", "out")
        self._log_rv()

    def _SCardControl(self):
        """ SCardControl """
        self.log_name("SCarControl")
        self.log_in_hCard()
        dwControlCode = self.log_dwControlCode()
        bSendLength = self.log_in2("bSendLength")
        bSendBuffer = self.log_buffer("bSendBuffer", "in")
        bRecvLength = self.log_out2("bRecvLength")
        bRecvBuffer = self.log_buffer("bRecvBuffer", "out")

        rv_text = self._log_rv()

        # do not parse the received buffer in case of error
        if rv_text != "SCARD_S_SUCCESS":
            return

        def hex2int(data, lengh):
            return [int(x, 16) for x in data.split(" ")]

        if dwControlCode == self.CM_IOCTL_GET_FEATURE_REQUEST:
            print("  parsing CM_IOCTL_GET_FEATURE_REQUEST results:")
            bRecvLength = int(bRecvLength, 16)

            bRecvBuffer = hex2int(bRecvBuffer, bRecvLength)

            # parse GET_FEATURE_REQUEST results
            while bRecvBuffer:
                tag = bRecvBuffer[0]
                length = bRecvBuffer[1]
                value = bRecvBuffer[2:2 + length]
                value_int = value[3] + 256 * (value[2] + 256
                    * (value[1] + 256 * value[0]))
                try:
                    self.ControlCodes[value_int] = self.features[tag]
                    self.__dict__[self.features[tag]] = value_int
                except KeyError:
                    self.ControlCodes[value_int] = "UNKNOWN"

                print("  Tag %s is 0x%X" % (self.ControlCodes[value_int],
                    value_int))

                bRecvBuffer = bRecvBuffer[2 + length:]

        elif dwControlCode == self.FEATURE_GET_TLV_PROPERTIES:
            print("  parsing FEATURE_GET_TLV_PROPERTIES results:")
            bRecvLength = int(bRecvLength, 16)

            bRecvBuffer = hex2int(bRecvBuffer, bRecvLength)

            tlv_properties = {
                1: "PCSCv2_PART10_PROPERTY_wLcdLayout",
                2: "PCSCv2_PART10_PROPERTY_bEntryValidationCondition",
                3: "PCSCv2_PART10_PROPERTY_bTimeOut2",
                4: "PCSCv2_PART10_PROPERTY_wLcdMaxCharacters",
                5: "PCSCv2_PART10_PROPERTY_wLcdMaxLines",
                6: "PCSCv2_PART10_PROPERTY_bMinPINSize",
                7: "PCSCv2_PART10_PROPERTY_bMaxPINSize",
                8: "PCSCv2_PART10_PROPERTY_sFirmwareID",
                9: "PCSCv2_PART10_PROPERTY_bPPDUSupport"}

            # parse GET_TLV_PROPERTIES results
            while bRecvBuffer:
                tag = bRecvBuffer[0]
                length = bRecvBuffer[1]
                value = bRecvBuffer[2:2 + length]

                try:
                    tag_text = tlv_properties[tag]
                except KeyError:
                    tag_text = "UNKNOWN"

                print("  Tag:", tag_text)
                print("   Length: ", length)
                print("   Value:", value)

                bRecvBuffer = bRecvBuffer[2 + length:]

        elif dwControlCode == self.FEATURE_IFD_PIN_PROPERTIES:
            print("  parsing FEATURE_IFD_PIN_PROPERTIES results:")
            bRecvBuffer = hex2int(bRecvBuffer, int(bRecvLength, 16))

            print("  wLcdLayout:", bRecvBuffer[0], bRecvBuffer[1])
            print("  bEntryValidationCondition:", bRecvBuffer[2])
            print("  bTimeOut2:", bRecvBuffer[3])

        elif dwControlCode == self.FEATURE_VERIFY_PIN_DIRECT:
            print("  parsing FEATURE_VERIFY_PIN_DIRECT:")
            bSendBuffer = hex2int(bSendBuffer, int(bSendLength, 16))

            print("  bTimerOut:", bSendBuffer[0])
            print("  bTimerOut2:", bSendBuffer[1])
            print("  bmFormatString:", bSendBuffer[2])
            print("  bmPINBlockString:", bSendBuffer[3])
            print("  bmPINLengthFormat:", bSendBuffer[4])
            print("  wPINMaxExtraDigit: 0x%02X%02X" % (bSendBuffer[6],
                                                       bSendBuffer[5]))
            print("   Min:", bSendBuffer[6])
            print("   Max:", bSendBuffer[5])
            print("  bEntryValidationCondition:", bSendBuffer[7])
            print("  bNumberMessage:", bSendBuffer[8])
            print("  wLangId: 0x%02X%02X" % (bSendBuffer[10],
                bSendBuffer[9]))
            print("  bMsgIndex:", bSendBuffer[11])
            print("  bTeoPrologue:", bSendBuffer[12], bSendBuffer[13], \
                bSendBuffer[14])
            print("  ulDataLength:", bSendBuffer[15] + \
                bSendBuffer[16] * 256 + bSendBuffer[17] * 2 ** 16 + \
                bSendBuffer[18] * 2 ** 24)
            print("  APDU:")
            result = hexdump(bSendBuffer[19:])
            for line in result:
                print("  ", line)

    def _SCardGetAttrib(self):
        """ SCardGetAttrib """
        self.log_name("SCardGetAttrib")
        self.log_in_hCard()
        self.log_in_attrid()
        self.log_out2("bAttrLen")
        self.log_buffer("bAttr", "out")
        self._log_rv()

    def _SCardSetAttrib(self):
        """ SCardSetAttrib """
        self.log_name("SCardSetAttrib")
        self.log_in_hCard()
        self.log_in_attrid()
        self.log_in2("bAttrLen")
        self.log_buffer("bAttr", "in")
        self._log_rv()

    def _SCardStatus(self):
        """ SCardStatus """
        self.log_name("SCardStatus")
        self.log_in_hCard()
        self.log_in2("pcchReaderLen")
        self.log_in2("pcbAtrLen")
        self.log_out2("cchReaderLen")
        self.log_out2("mszReaderName")
        self.log_out2("dwState")
        self.log_out2("dwProtocol")
        data = self.log_out2("bAtrLen")
        if not data == "NULL":
            self.log_out2("bAtr")
        else:
            self.log_out("bAtr")
        self._log_rv()

    def _SCardReconnect(self):
        """ SCardReconnect """
        self.log_name("SCardReconnect")
        self.log_in_hCard()
        self.log_in_dwShareMode()
        self.log_in_dwPreferredProtocols()
        self.log_in2("dwInitialization")
        self.log_out_dwActiveProtocol()
        self._log_rv()

    def _SCardDisconnect(self):
        """" SCardDisconnect """
        self.log_name("SCardDisconnect")
        self.log_in_hCard()
        self.log_in_disposition()
        self._log_rv()

    def _SCardBeginTransaction(self):
        """ SCardBeginTransaction """
        self.log_name("SCardBeginTransaction")
        self.log_in_hCard()
        self._log_rv()

    def _SCardEndTransaction(self):
        """ SCardEndTransaction """
        self.log_name("SCardEndTransaction")
        self.log_in_hCard()
        self.log_in_disposition()
        self._log_rv()

    def _SCardCancel(self):
        """ SCardCancel """
        self.log_name("SCardCancel")
        self.log_in_hCard()
        self._log_rv()

    def __init__(self, queue, stats, indent=0, color=True, diffable=False):
        """ constructor """

        # communication queue
        self.queue = queue

        self.color = color
        self.diffable = diffable
        self.stats = stats
        self.indent = " " * (indent * 4)
        if display_thread:
            self.indent += " (t%d) " % indent

        self.features = {0x01: "FEATURE_VERIFY_PIN_START",
                         0x02: "FEATURE_VERIFY_PIN_FINISH",
                         0x03: "FEATURE_MODIFY_PIN_START",
                         0x04: "FEATURE_MODIFY_PIN_FINISH",
                         0x05: "FEATURE_GET_KEY_PRESSED",
                         0x06: "FEATURE_VERIFY_PIN_DIRECT",
                         0x07: "FEATURE_MODIFY_PIN_DIRECT",
                         0x08: "FEATURE_MCT_READER_DIRECT",
                         0x09: "FEATURE_MCT_UNIVERSAL",
                         0x0A: "FEATURE_IFD_PIN_PROPERTIES",
                         0x0B: "FEATURE_ABORT",
                         0x0C: "FEATURE_SET_SPE_MESSAGE",
                         0x0D: "FEATURE_VERIFY_PIN_DIRECT_APP_ID",
                         0x0E: "FEATURE_MODIFY_PIN_DIRECT_APP_ID",
                         0x0F: "FEATURE_WRITE_DISPLAY",
                         0x10: "FEATURE_GET_KEY",
                         0x11: "FEATURE_IFD_DISPLAY_PROPERTIES",
                         0x12: "FEATURE_GET_TLV_PROPERTIES",
                         0x13: "FEATURE_CCID_ESC_COMMAND"}

        def SCARD_CTL_CODE(code):
            return 0x42000000 + code

        self.CM_IOCTL_GET_FEATURE_REQUEST = SCARD_CTL_CODE(3400)
        self.ControlCodes = {
            SCARD_CTL_CODE(1): "IOCTL_SMARTCARD_VENDOR_IFD_EXCHANGE",
            SCARD_CTL_CODE(3400): "CM_IOCTL_GET_FEATURE_REQUEST"
            }
        # dwControlCode not yet known
        for key in self.features.keys():
            self.__dict__[self.features[key]] = -1

    def worker(self, *args):
        line = self.queue.get()
        while line != '':
            # Enter function?
            if line[0] != '>':
                if line == 'EXIT':
                    return
                else:
                    print("Garbage: ", line)
            else:
                try:
                    # dispatch
                    (direction, sec, usec, fct) = line.strip().split('|')
                    self.sec = int(sec)
                    self.usec = int(usec)
                    if fct == 'SCardEstablishContext':
                        self._SCardEstablishContext()
                    elif fct == 'SCardReleaseContext':
                        self._SCardReleaseContext()
                    elif fct == 'SCardIsValidContext':
                        self._SCardIsValidContext()
                    elif fct == 'SCardListReaderGroups':
                        self._SCardListReaderGroups()
                    elif fct == 'SCardFreeMemory':
                        self._SCardFreeMemory()
                    elif fct == 'SCardListReaders':
                        self._SCardListReaders()
                    elif fct == 'SCardGetStatusChange':
                        self._SCardGetStatusChange()
                    elif fct == 'SCardConnect':
                        self._SCardConnect()
                    elif fct == 'SCardTransmit':
                        self._SCardTransmit()
                    elif fct == 'SCardControl' or fct == 'SCardControl132':
                        self._SCardControl()
                    elif fct == 'SCardGetAttrib':
                        self._SCardGetAttrib()
                    elif fct == 'SCardSetAttrib':
                        self._SCardSetAttrib()
                    elif fct == 'SCardStatus':
                        self._SCardStatus()
                    elif fct == 'SCardReconnect':
                        self._SCardReconnect()
                    elif fct == 'SCardDisconnect':
                        self._SCardDisconnect()
                    elif fct == 'SCardBeginTransaction':
                        self._SCardBeginTransaction()
                    elif fct == 'SCardEndTransaction':
                        self._SCardEndTransaction()
                    elif fct == 'SCardCancel':
                        self._SCardCancel()
                    else:
                        print("Unknown function:", fct)
                except SpyExit:
                    return

            try:
                record = self.stats[fct]
            except KeyError:
                record = self.stats[fct] = StatRecord(fct)
            record.executions.append(self.execution_time)

            line = self.queue.get()


class PCSCdemultiplexer(object):
    def __init__(self, logfile=None, color=True, diffable=False):
        """ constructor """

        # use default fifo file?
        if logfile is None:
            logfile = os.path.expanduser('~/pcsc-spy')

            # create the FIFO file
            try:
                os.mkfifo(logfile)
            except OSError:
                print("fifo %s already present. Reusing it." % logfile)

        self.sec = self.usec = 0

        self.fifo = logfile
        self.filedesc2 = open(self.fifo, 'r')

        self.queues = dict()
        self.color = color
        self.diffable = diffable

    def __del__(self):
        """ cleanup """
        from stat import S_ISFIFO
        file_stat = os.stat(self.fifo)

        #  remove the log fifo only if it is a FIFO and not a log file
        if S_ISFIFO(file_stat.st_mode):
            os.unlink(self.fifo)

    def loop(self):
        """ loop reading logs """

        # for statistics
        stats = dict()

        threads = dict()
        indent = 0

        # dispatch
        line = self.filedesc2.readline().strip()

        (thread, tail) = line.split('@')
        res = tail.strip().split('|')
        # check the first line format
        if res[0] != ">":
            print("Wrong format!")
            print("First line Should start with a '>' but got:")
            print(tail)
            return
        (direction, sec, usec, fct) = res

        start_time = int(sec) + int(usec) / 1000000.

        lastest_result = ""
        while line != '':
            previous_thread = thread
            (thread, tail) = line.split('@')
            if "<" in tail:
                lastest_result = tail

            # in case the thread changes
            if previous_thread != thread:
                # schedule the other thread so it has time to empty its
                # queue
                time.sleep(.001)

            try:
                queue = self.queues[thread]
            except KeyError:
                queue = self.queues[thread] = Queue()
                stats[thread] = dict()
                # new worker
                spy = PCSCspy(queue, stats[thread], indent=indent,
                    color=self.color, diffable=self.diffable)
                threads[thread] = Thread(target=spy.worker)
                threads[thread].start()
                indent += 1

            queue.put(tail)

            line = self.filedesc2.readline().strip()

        # tell the workers to exit
        for thread in self.queues.keys():
            self.queues[thread].put('EXIT')

        # wait for all the workers to finish
        for thread in threads:
            threads[thread].join()

        (code, rv, sec, usec) = _parse_rv(lastest_result)
        end_time = sec + usec / 1000000.
        total_time = end_time - start_time

        # compute some statistics
        thread_n = 1
        for thread in stats:
            stat = stats[thread]
            for fct in stat:
                record = stat[fct]
                record.occurences = len(record.executions)
                record.total_time = sum(record.executions)

            records = [stat[fct] for fct in stat]

            # display statistics sorted by total_time
            print()
            print("Thread %d/%d" % (thread_n, len(stats)))
            print("Results sorted by total execution time")
            print("total time: %f sec" % total_time)
            for record in sorted(records, key=attrgetter('total_time'),
                                 reverse=True):
                print("%f sec (%3d calls) %5.2f%% %s" % (record.total_time,
                    record.occurences, record.total_time / total_time * 100.,
                    record.name))

            thread_n += 1


def main(logfile=None, color=True, diffable=False):
    """ main """
    spy = PCSCdemultiplexer(logfile, color, diffable)
    spy.loop()


def signal_handler(sig, frame):
    print('Ctrl-C, exiting.')
    os.kill(os.getpid(), signal.SIGQUIT)


def print_usage():
    print("Usage: pcsc-spy [-n|--nocolor] [-d|--diffable] [-h|--help] [-v|--version] [-t|--thread]")

if __name__ == "__main__":
    import sys
    import getopt

    logfile = None
    try:
        opts, args = getopt.getopt(sys.argv[1:], "ndhvt", ["nocolor",
            "diffable", "help", "version", "thread"])
    except getopt.GetoptError:
        print_usage()
        sys.exit(1)

    color = True
    diffable = False
    display_thread = False
    for o, a in opts:
        if o == "-n" or o == "--nocolor":
            color = False
        if o == "-d" or o == "--diffable":
            diffable = True
        if o == "-h" or o == "--help":
            print_usage()
            sys.exit(1)
        if o == "-v" or o == "--version":
            print("pcsc-spy version 1.1")
            print("Copyright (c) 2011-2021, Ludovic Rousseau <ludovic.rousseau@free.fr>")
            print()
            sys.exit(1)
        if o == "-t" or o == "--thread":
            display_thread = True

    if len(args) > 0:
        logfile = args[0]

    signal.signal(signal.SIGINT, signal_handler)
    main(logfile, color=color, diffable=diffable)