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-rw-r--r--tools/smartcard-interpreter.py572
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diff --git a/tools/smartcard-interpreter.py b/tools/smartcard-interpreter.py
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+#!/usr/bin/env python3
+#
+# Copyright 2022 David Fort <contact@hardening-consulting.com>
+#
+# This script is meant to parse some FreeRDP logs in DEBUG mode (WLOG_LEVEL=DEBUG) and interpret the
+# smartcard traffic, dissecting the PIV or GIDS commands
+#
+# usage:
+# * live: WLOG_LEVEL=DEBUG xfreerdp <args with smartcard> | python3 smartcard-interpreter.py
+# * on an existing log file: python3 smartcard-interpreter.py <log file>
+#
+import sys
+import codecs
+
+
+CMD_NAMES = {
+ 0x04: "DESACTIVATE FILE",
+ 0x0C: "ERASE RECORD",
+ 0x0E: "ERASE BINARY",
+ 0x0F: "ERASE BINARY",
+ 0x20: "VERIFY",
+ 0x21: "VERIFY",
+ 0x22: "MSE",
+ 0x24: "CHANGE REFERENCE DATA",
+ 0x25: "MSE",
+ 0x26: "DISABLE VERIFICATION REQUIREMENT",
+ 0x28: "ENABLE VERIFICATION REQUIREMENT",
+ 0x2A: "PSO",
+ 0x2C: "RESET RETRY COUNTER",
+ 0x2D: "RESET RETRY COUNTER",
+ 0x44: "ACTIVATE FILE",
+ 0x46: "GENERATE ASYMMETRIC KEY PAIR",
+ 0x47: "GENERATE ASYMMETRIC KEY PAIR",
+ 0x84: "GET CHALLENGE",
+ 0x86: "GENERAL AUTHENTICATE",
+ 0x87: "GENERAL AUTHENTICATE",
+ 0x88: "INTERNAL AUTHENTICATE",
+ 0xA0: "SEARCH BINARY",
+ 0xA1: "SEARCH BINARY",
+ 0xA2: "SEARCH RECORD",
+ 0xA4: "SELECT",
+ 0xB0: "READ BINARY",
+ 0xB1: "READ BINARY",
+ 0xB2: "READ RECORD",
+ 0xB3: "READ RECORD",
+ 0xC0: "GET RESPONSE",
+ 0xC2: "ENVELOPPE",
+ 0xC3: "ENVELOPPE",
+ 0xCA: "GET DATA",
+ 0xCB: "GET DATA",
+ 0xD0: "WRITE BINARY",
+ 0xD1: "WRITE BINARY",
+ 0xD2: "WRITE RECORD",
+ 0xD6: "UPDATE BINARY",
+ 0xD7: "UPDATE BINARY",
+ 0xDA: "PUT DATA",
+ 0xDB: "PUT DATA",
+ 0xDC: "UPDATE RECORD",
+ 0xDD: "UPDATE RECORD",
+ 0xE0: "CREATE FILE",
+ 0xE2: "APPEND RECORD",
+ 0xE4: "DELETE FILE",
+ 0xE6: "TERMINATE DF",
+ 0xE8: "TERMINATE EF",
+ 0xFE: "TERMINATE CARD USAGE",
+}
+
+AIDs = {
+ "a00000039742544659": "MsGidsAID",
+ "a000000308": "PIV",
+ "a0000003974349445f0100": "SC PNP",
+}
+
+FIDs = {
+ 0x0000: "Current EF",
+ 0x2F00: "EF.DIR",
+ 0x2F01: "EF.ATR",
+ 0x3FFF: "Current application(ADF)",
+}
+
+DOs = {
+ "df1f": "DO_FILESYSTEMTABLE",
+ "df20": "DO_CARDID",
+ "df21": "DO_CARDAPPS",
+ "df22": "DO_CARDCF",
+ "df23": "DO_CMAPFILE",
+ "df24": "DO_KXC00",
+}
+
+ERROR_CODES = {
+ 0x9000: "success",
+ 0x6282: "end of file or record",
+ 0x63C0: "warning counter 0",
+ 0x63C1: "warning counter 1",
+ 0x63C2: "warning counter 2",
+ 0x63C3: "warning counter 3",
+ 0x63C4: "warning counter 4",
+ 0x63C5: "warning counter 5",
+ 0x63C6: "warning counter 6",
+ 0x63C7: "warning counter 7",
+ 0x63C8: "warning counter 8",
+ 0x63C9: "warning counter 9",
+ 0x6982: "security status not satisfied",
+ 0x6985: "condition of use not satisfied",
+ 0x6A80: "incorrect parameter cmd data field",
+ 0x6A81: "function not suppported",
+ 0x6A82: "file or application not found",
+ 0x6A83: "record not found",
+ 0x6A88: "REFERENCE DATA NOT FOUND",
+ 0x6D00: "unsupported",
+}
+
+PIV_OIDs = {
+ "5fc101": "X.509 Certificate for Card Authentication",
+ "5fc102": "Card Holder Unique Identifier",
+ "5fc103": "Cardholder Fingerprints",
+ "5fc105": "X.509 Certificate for PIV Authentication",
+ "5fc106": "Security Object",
+ "5fc107": "Card Capability Container",
+ "5fc108": "Cardholder Facial Image",
+ "5fc10a": "X.509 Certificate for Digital Signature",
+ "5fc10b": "X.509 Certificate for Key Management",
+ "5fc10d": "Retired X.509 Certificate for Key Management 1",
+ "5fc10e": "Retired X.509 Certificate for Key Management 2",
+ "5fc10f": "Retired X.509 Certificate for Key Management 3",
+}
+
+class ApplicationDummy(object):
+ def __init__(self, aid):
+ self.aid = aid
+
+ def getAID(self):
+ return self.aid
+
+ def selectResult(self, fci, status, body):
+ return 'selectResult(%s, %s, %s)\n' %(fci, status, body.hex())
+
+ def getData(self, fileId, bytes):
+ return 'getData(0x%x, %s)\n' %(fileId, bytes.hex())
+
+ def getDataResult(self, status, body):
+ return 'getDataResult(0x%x, %s)\n' %(status, body.hex())
+
+ def mse(self, body):
+ return body.hex()
+
+ def mseResult(self, status, body):
+ return body.hex()
+
+ def pso(self, body):
+ return body.hex()
+
+ def psoResult(self, status, body):
+ return body.hex()
+
+
+class ApplicationPIV(object):
+ def __init__(self, aid):
+ self.lastGet = None
+ self.aid = aid
+
+ def getAID(self):
+ return self.aid
+
+ def selectResult(self, selectT, status, body):
+ ret = ''
+ appTag = body[0]
+ appLen = body[1]
+
+ body = body[2:2+appLen]
+ while len(body) > 2:
+ tag = body[0]
+ tagLen = body[1]
+ if selectT == "FCI":
+ if tag == 0x4f:
+ ret += "\tpiv version: %s\n" % body[2:2 + tagLen].hex()
+ elif tag == 0x79:
+ subBody = body[2:2 + tagLen]
+
+ subTag = subBody[0]
+ subLen = subBody[1]
+
+ content = subBody.hex()
+ if subTag == 0x4f:
+ v = content[4:]
+ if v.startswith('a000000308'):
+ content = 'NIST RID'
+ ret += '\tCoexistent tag allocation authority: %s\n' % content
+
+ elif tag == 0x50:
+ ret += '\tapplication label\n'
+ elif tag == 0xac:
+ ret += '\tCryptographic algorithms supported\n'
+ else:
+ rety += '\tunknown tag 0x%x\n' % tag
+
+ else:
+ ret += "\tTODO: selectType %s\n" % selectT
+
+ body = body[2+tagLen:]
+
+ return ret
+
+ def getData(self, fileId, bytes):
+ ret = "\tfileId=%s\n" % FIDs.get(fileId, "%0.4x" % fileId)
+
+ lc = bytes[4]
+ tag = bytes[5]
+ tagLen = bytes[6]
+
+ if lc == 4:
+ ret += "\tdoId=%0.4x\n"% (bytes[7] * 256 + bytes[8])
+
+ elif lc == 0xa:
+ keyStr = ''
+ # TLV
+ i = 7
+ tag = bytes[i]
+ tagLen = bytes[i+1]
+ keyRef = bytes[i+3]
+ keyStr = "key(tag=0x%x len=%d ref=0x%x)=" % (tag, tagLen, keyRef)
+ i = i + 2 + tagLen
+
+ tag = bytes[i]
+ tagLen = bytes[i+1]
+ keyStr += "value(tag=0x%x len=%d)"
+ elif lc == 5:
+ if tag == 0x5C:
+ tagStr = bytes[7:].hex()
+ ret += '\ttag: %s(%s)\n' % (tagStr, PIV_OIDs.get(tagStr, '<unknown>'))
+ self.lastGet = tagStr
+ else:
+ ret += "\tunknown key access\n"
+
+ return ret
+
+ def getDataResult(self, status, body):
+ ret = ''
+ if not len(body):
+ return ''
+ appTag = body[0]
+ appLen = body[1]
+
+ body = body[2:2+appLen]
+ while len(body) > 2:
+ tag = body[0]
+ tagLen = body[1]
+ tagBody = body[2:2+tagLen]
+
+ if self.lastGet in ('5fc102',):
+ # Card holder Unique Identifier
+ if tag == 0x30:
+ ret += '\tFASC-N: %s\n' % tagBody.hex()
+ elif tag == 0x34:
+ ret += '\tGUID: %s\n' % tagBody.hex()
+ elif tag == 0x35:
+ ret += '\texpirationDate: %s\n' % tagBody.decode('utf8')
+ elif tag == 0x3e:
+ ret += '\tIssuer Asymmetric Signature: %s\n' % tagBody.hex()
+ else:
+ ret += "\tunknown tag=0x%x len=%d content=%s\n" % (tag, tagLen, tagBody.hex())
+ else:
+ ret += "\t%s: unknown tag=0x%x len=%d content=%s\n" % (self.lastGet, tag, tagLen, tagBody.hex())
+
+ body = body[2+tagLen:]
+
+ return ret
+
+ def mse(self, body):
+ return body.hex()
+
+ def mseResult(self, status, body):
+ return body.hex()
+
+ def pso(self, body):
+ return body.hex()
+
+ def psoResult(self, status, body):
+ return body.hex()
+
+
+
+class ApplicationGids(object):
+ def __init__(self, aid):
+ self.aid = aid
+ self.lastDo = None
+
+ def getAID(self):
+ return self.aid
+
+ def parseFcp(self, bytes):
+ ret = ''
+ tag = bytes[0]
+ tagLen = bytes[1]
+
+ body = bytes[2:2+tagLen]
+
+ if tag == 0x62:
+ ret += '\tFCP\n'
+
+ while len(body) > 2:
+ tag2 = body[0]
+ tag2Len = body[1]
+ tag2Body = body[2:2+tag2Len]
+
+ if tag2 == 0x82:
+ ret += '\t\tFileDescriptor: %s\n' % tag2Body.hex()
+ elif tag2 == 0x8a:
+ ret += '\t\tLifeCycleByte: %s\n' % tag2Body.hex()
+ elif tag2 == 0x84:
+ ret += '\t\tDF name: %s\n' % tag2Body.encode('utf8')
+ elif tag2 == 0x8C:
+ ret += '\t\tSecurityAttributes: %s\n' % tag2Body.hex()
+ else:
+ ret += '\t\tunhandled tag=0x%x body=%s\n' % (tag2, tag2Body.hex())
+
+ body = body[2+tag2Len:]
+
+ return ret
+
+ def parseFci(self, bytes):
+ ret = ''
+ tag = bytes[0]
+ tagLen = bytes[1]
+
+ body = bytes[2:2+tagLen]
+
+ if tag == 0x61:
+ ret += '\tFCI\n'
+
+ while len(body) > 2:
+ tag2 = body[0]
+ tag2Len = body[1]
+ tag2Body = body[2:2+tag2Len]
+
+ if tag2 == 0x4F:
+ ret += '\t\tApplication AID: %s\n' % tag2Body.hex()
+
+ elif tag2 == 0x50:
+ ret += '\t\tApplication label: %s\n' % tag2Body.encode('utf8')
+
+ elif tag2 == 0x73:
+ body2 = tag2Body
+ tokens = []
+ while len(body2) > 2:
+ tag3 = body2[0]
+ tag3Len = body2[1]
+
+ if tag3 == 0x40:
+ v = body2[2]
+ if v & 0x80:
+ tokens.append('mutualAuthSymAlgo')
+ if v & 0x40:
+ tokens.append('extAuthSymAlgo')
+ if v & 0x20:
+ tokens.append('keyEstabIntAuthECC')
+
+
+ body2 = body2[2+tag3Len:]
+
+ ret += '\t\tDiscretionary data objects: %s\n' % ",".join(tokens)
+ else:
+ ret += '\t\tunhandled tag=0x%x body=%s\n' % (tag2, tag2Body.hex())
+
+ body = body[2+tag2Len:]
+
+ return ret
+
+
+ def selectResult(self, selectT, status, body):
+ if not len(body):
+ return ''
+
+ if selectT == 'FCP':
+ return self.parseFcp(body)
+ elif selectT == 'FCI':
+ return self.parseFci(body)
+ else:
+ return '\tselectResult(%s, %s, %s)\n' % (selectT, status, body.hex())
+
+ def getData(self, fileId, bytes):
+ lc = bytes[4]
+ tag = bytes[5]
+ tagLen = bytes[6]
+
+ if tag == 0x5c:
+ doStr = bytes[7:7+tagLen].hex()
+ ret = '\tDO=%s\n' % DOs.get(doStr, "<%s>" % doStr)
+ self.lastDo = doStr
+ else:
+ ret = '\tunknown tag=0%x len=%d v=%s' % (tag, tagLen, bytes[7:7+tagLen].hex())
+
+ return ret
+
+ def getDataResult(self, status, body):
+ ret = ''
+ '''
+ while len(body) > 2:
+ tag = body[0]
+ tagLen = body[1]
+
+ ret += '\ttag=0x%x len=%d content=%s\n' % (tag, tagLen, body[2:2+tagLen].hex())
+
+ body = body[2+tagLen:]
+ '''
+ return ret
+
+ def mse(self, body):
+ return body.hex()
+
+ def mseResult(self, status, body):
+ return body.hex()
+
+ def pso(self, body):
+ return body.hex()
+
+ def psoResult(self, status, body):
+ return body.hex()
+
+
+
+def createAppByAid(aid):
+ if aid == "a000000308":
+ return ApplicationPIV(aid)
+
+ elif aid in ('a00000039742544659',):
+ return ApplicationGids(aid)
+
+ return ApplicationDummy(aid)
+
+
+if __name__ == '__main__':
+ if len(sys.argv) > 1:
+ fin = open(sys.argv[1], "r")
+ else:
+ fin = sys.stdin
+
+ lineno = 0
+ lastCmd = 0
+ lastSelect = None
+ lastSelectFCI = False
+ lastGetItem = None
+ currentApp = None
+
+ for l in fin.readlines():
+ lineno += 1
+
+ if not len(l):
+ continue
+
+ # smartcard loggers have changed
+ #if l.find("[DEBUG][com.freerdp.channels.smartcard.client]") == -1:
+ # continue
+
+ body = ''
+ recvKey = 'pbRecvBuffer: { '
+
+ pos = l.find(recvKey)
+ if pos != -1:
+ toCard = False
+
+ pos += len(recvKey)
+ pos2 = l.find(' }', pos)
+ if pos2 == -1:
+ print("line %d: invalid recvBuffer")
+ continue
+
+ else:
+ toCard = True
+ sendKey = 'pbSendBuffer: { '
+ pos = l.find(sendKey)
+ if pos == -1:
+ continue
+ pos += len(sendKey)
+
+ pos2 = l.find(' }', pos)
+ if pos2 == -1:
+ print("line %d: invalid sendBuffer")
+ continue
+
+ body = l[pos:pos2]
+
+ print(l[0:-1])
+ bytes = codecs.decode(body, 'hex')
+ if toCard:
+ (cla, ins, p1, p2) = bytes[0:4]
+ cmdName = CMD_NAMES.get(ins, "<COMMAND 0x%x>" % ins)
+ print(cmdName + ":")
+
+ if cmdName == "SELECT":
+ lc = bytes[4]
+ i = 5
+
+ if p1 == 0x00:
+ print("\tselectByFID: %0.2x%0.2x" % (bytes[i], bytes[i+1]))
+ i = i + lc
+
+ elif p1 == 0x4:
+ aid = bytes[i:i+lc].hex()
+ lastSelect = AIDs.get(aid, '')
+ print("\tselectByAID: %s(%s)" % (aid, lastSelect))
+
+ if p2 == 0x00:
+ lastSelectT = "FCI"
+ print('\tFCI')
+ elif p2 == 0x04:
+ print('\tFCP')
+ lastSelectT = "FCP"
+ elif p2 == 0x08:
+ print('\tFMD')
+ lastSelectT = "FMD"
+
+ if not currentApp or currentApp.getAID() != aid:
+ currentApp = createAppByAid(aid)
+
+
+ elif cmdName == "VERIFY":
+ lc = bytes[4]
+ P2_DATA_QUALIFIER = {
+ 0x00: "Card global password",
+ 0x01: "RFU",
+ 0x80: "Application password",
+ 0x81: "Application resetting password",
+ 0x82: "Application security status resetting code",
+ }
+
+ pin=''
+ if lc:
+ pin = ", pin='" + bytes[5:5+lc-2].decode('utf8)') + "'"
+
+ print("\t%s%s" % (P2_DATA_QUALIFIER.get(p2, "<unknown>"), pin))
+
+ elif cmdName == "GET DATA":
+ lc = bytes[4]
+ fileId = p1 * 256 + p2
+
+ ret = currentApp.getData(fileId, bytes)
+ print("%s" % ret)
+
+ elif cmdName == "MSE":
+ ret = currentApp.mse(bytes[5:5+lc])
+ print("%s" % ret)
+
+ elif cmdName == "PSO":
+ ret = currentApp.pso(bytes[5:5+lc])
+ print("%s" % ret)
+ else:
+ print('handle %s' % cmdName)
+
+ lastCmd = cmdName
+
+ else:
+ # Responses
+ status = bytes[-1] + bytes[-2] * 256
+ body = bytes[0:-2]
+ print("status=0x%0.4x(%s)" % (status, ERROR_CODES.get(status, "<unknown>")))
+
+ if not len(body):
+ continue
+
+ ret = ''
+ if lastCmd == "SELECT":
+ ret = currentApp.selectResult(lastSelectT, status, body)
+ elif lastCmd == "GET DATA":
+ ret = currentApp.getDataResult(status, body)
+ elif lastCmd == "MSE":
+ ret = currentApp.mseResult(status, body)
+ elif lastCmd == "PSO":
+ ret = currentApp.psoResult(status, body)
+
+ if ret:
+ print("%s" % ret) \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 03:24:21 +0000