/usr/lib/python2.7/dist-packages/smartcard/ATR.py is in python-pyscard 1.9.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 | """ATR class managing some of the Answer To Reset content.
__author__ = "http://www.gemalto.com"
Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
This file is part of pyscard.
pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
pyscard is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
from __future__ import print_function
from smartcard.Exceptions import SmartcardException
from smartcard.util import toHexString
class ATR(object):
"""ATR class."""
clockrateconversion = [372, 372, 558, 744, 1116, 1488, 1860, 'RFU',
'RFU', 512, 768, 1024, 1536, 2048, 'RFU', 'RFU',
'RFU']
bitratefactor = ['RFU', 1, 2, 4, 8, 16, 32, 'RFU', 12, 20, 'RFU',
'RFU', 'RFU', 'RFU', 'RFU', 'RFU']
currenttable = [25, 50, 100, 'RFU']
def __init__(self, bytes):
"""Construct a new atr from bytes."""
self.bytes = bytes
self.__initInstance__()
def __checksyncbyte__(self):
"""Check validity of TS."""
if not 0x3b == self.bytes[0] and not 0x03f == self.bytes[0]:
raise SmartcardException("invalid TS 0x%-0.2x" % self.bytes[0])
def __initInstance__(self):
"""
Parse ATR and initialize members:
- TS: initial character
- T0: format character
- TA[n], TB[n], TC[n], TD[n], for n=0,1,...: protocol parameters
@note: protocol parameters indices start at 0, e.g.
TA[0], TA[1] correspond to the ISO standard TA1, TA2
parameters
- historicalBytes: the ATR T1, T2, ..., TK historical bytes
- TCK: checksum byte (only for protocols different from T=0)
- FI: clock rate conversion factor
- DI: voltage adjustment factor
- PI1: programming voltage factor
- II: maximum programming current factor
- N: extra guard time
"""
self.__checksyncbyte__()
# initial character
self.TS = self.bytes[0]
# format character
self.T0 = self.bytes[1]
# count of historical bytes
self.K = self.T0 & 0x0f
# initialize optional characters lists
self.TA = []
self.TB = []
self.TC = []
self.TD = []
self.Y = []
self.hasTA = []
self.hasTB = []
self.hasTC = []
self.hasTD = []
TD = self.T0
hasTD = 1
n = 0
offset = 1
self.interfaceBytesCount = 0
while hasTD:
self.Y += [TD >> 4 & 0x0f]
self.hasTD += [(self.Y[n] & 0x08) != 0]
self.hasTC += [(self.Y[n] & 0x04) != 0]
self.hasTB += [(self.Y[n] & 0x02) != 0]
self.hasTA += [(self.Y[n] & 0x01) != 0]
self.TA += [None]
self.TB += [None]
self.TC += [None]
self.TD += [None]
if self.hasTA[n]:
self.TA[n] = self.bytes[offset + self.hasTA[n]]
if self.hasTB[n]:
self.TB[n] = self.bytes[offset + self.hasTA[n] + self.hasTB[n]]
if self.hasTC[n]:
self.TC[n] = self.bytes[offset +
self.hasTA[n] +
self.hasTB[n] +
self.hasTC[n]]
if self.hasTD[n]:
self.TD[n] = self.bytes[offset +
self.hasTA[n] +
self.hasTB[n] +
self.hasTC[n] +
self.hasTD[n]]
self.interfaceBytesCount += self.hasTA[n] +\
self.hasTB[n] +\
self.hasTC[n] +\
self.hasTD[n]
TD = self.TD[n]
hasTD = self.hasTD[n]
offset = offset + self.hasTA[n] + self.hasTB[n] +\
self.hasTC[n] + self.hasTD[n]
n = n + 1
# historical bytes
self.historicalBytes = self.bytes[offset + 1:offset + 1 + self.K]
# checksum
self.hasChecksum = (len(self.bytes) == offset + 1 + self.K + 1)
if self.hasChecksum:
self.TCK = self.bytes[-1]
checksum = 0
for b in self.bytes[1:]:
checksum = checksum ^ b
self.checksumOK = (checksum == 0)
else:
self.TCK = None
# clock-rate conversion factor
if self.hasTA[0]:
self.FI = self.TA[0] >> 4 & 0x0f
else:
self.FI = None
# bit-rate adjustment factor
if self.hasTA[0]:
self.DI = self.TA[0] & 0x0f
else:
self.DI = None
# maximum programming current factor
if self.hasTB[0]:
self.II = self.TB[0] >> 5 & 0x03
else:
self.II = None
# programming voltage factor
if self.hasTB[0]:
self.PI1 = self.TB[0] & 0x1f
else:
self.PI1 = None
# extra guard time
self.N = self.TC[0]
def getChecksum(self):
"""Return the checksum of the ATR. Checksum is mandatory only
for T=1."""
return self.TCK
def getHistoricalBytes(self):
"""Return historical bytes."""
return self.historicalBytes
def getHistoricalBytesCount(self):
"""Return count of historical bytes."""
return len(self.historicalBytes)
def getInterfaceBytesCount(self):
"""Return count of interface bytes."""
return self.interfaceBytesCount
def getTA1(self):
"""Return TA1 byte."""
return self.TA[0]
def getTB1(self):
"""Return TB1 byte."""
return self.TB[0]
def getTC1(self):
"""Return TC1 byte."""
return self.TC[0]
def getTD1(self):
"""Return TD1 byte."""
return self.TD[0]
def getBitRateFactor(self):
"""Return bit rate factor."""
if self.DI is not None:
return ATR.bitratefactor[self.DI]
else:
return 1
def getClockRateConversion(self):
"""Return clock rate conversion."""
if self.FI is not None:
return ATR.clockrateconversion[self.FI]
else:
return 372
def getProgrammingCurrent(self):
"""Return maximum programming current."""
if self.II is not None:
return ATR.currenttable[self.II]
else:
return 50
def getProgrammingVoltage(self):
"""Return programming voltage."""
if self.PI1 is not None:
return 5 * (1 + self.PI1)
else:
return 5
def getGuardTime(self):
"""Return extra guard time."""
return self.N
def getSupportedProtocols(self):
"""Returns a dictionnary of supported protocols."""
protocols = {}
for td in self.TD:
if td is not None:
strprotocol = "T=%d" % (td & 0x0F)
protocols[strprotocol] = True
if not self.hasTD[0]:
protocols['T=0'] = True
return protocols
def isT0Supported(self):
"""Return True if T=0 is supported."""
protocols = self.getSupportedProtocols()
return 'T=0' in protocols
def isT1Supported(self):
"""Return True if T=1 is supported."""
protocols = self.getSupportedProtocols()
return 'T=1' in protocols
def isT15Supported(self):
"""Return True if T=15 is supported."""
protocols = self.getSupportedProtocols()
return 'T=15' in protocols
def dump(self):
"""Dump the details of an ATR."""
for i in range(0, len(self.TA)):
if self.TA[i] is not None:
print("TA%d: %x" % (i + 1, self.TA[i]))
if self.TB[i] is not None:
print("TB%d: %x" % (i + 1, self.TB[i]))
if self.TC[i] is not None:
print("TC%d: %x" % (i + 1, self.TC[i]))
if self.TD[i] is not None:
print("TD%d: %x" % (i + 1, self.TD[i]))
print('supported protocols ' + ','.join(self.getSupportedProtocols()))
print('T=0 supported: ' + str(self.isT0Supported()))
print('T=1 supported: ' + str(self.isT1Supported()))
if self.getChecksum():
print('checksum: %d' % self.getChecksum())
print('\tclock rate conversion factor: ' +
str(self.getClockRateConversion()))
print('\tbit rate adjustment factor: ' + str(self.getBitRateFactor()))
print('\tmaximum programming current: ' +
str(self.getProgrammingCurrent()))
print('\tprogramming voltage: ' + str(self.getProgrammingVoltage()))
print('\tguard time: ' + str(self.getGuardTime()))
print('nb of interface bytes: %d' % self.getInterfaceBytesCount())
print('nb of historical bytes: %d' % self.getHistoricalBytesCount())
def __str__(self):
"""Returns a string representation of the ATR as a strem of bytes."""
return toHexString(self.bytes)
if __name__ == '__main__':
"""Small sample illustrating the use of ATR."""
atrs = [[0x3F, 0x65, 0x25, 0x00, 0x2C, 0x09, 0x69, 0x90, 0x00],
[0x3F, 0x65, 0x25, 0x08, 0x93, 0x04, 0x6C, 0x90, 0x00],
[0x3B, 0x16, 0x94, 0x7C, 0x03, 0x01, 0x00, 0x00, 0x0D],
[0x3B, 0x65, 0x00, 0x00, 0x9C, 0x11, 0x01, 0x01, 0x03],
[0x3B, 0xE3, 0x00, 0xFF, 0x81, 0x31, 0x52, 0x45, 0xA1,
0xA2, 0xA3, 0x1B],
[0x3B, 0xE5, 0x00, 0x00, 0x81, 0x21, 0x45, 0x9C, 0x10,
0x01, 0x00, 0x80, 0x0D]]
for atr in atrs:
a = ATR(atr)
print(80 * '-')
print(a)
a.dump()
print(toHexString(a.getHistoricalBytes()))
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