def _parse(self, contents): self._rawdata = contents self._tlvdata = TLV_utils.unpack(contents) tmp = TLV_utils.tlv_find_tag(self._tlvdata, 0xEA, num_results = 1) if len(tmp) == 0: raise ValueError, "Can't parse information file, tag 0xEA not found" tmp = TLV_utils.tlv_find_tag(tmp, 0x85, num_results = 1) if len(tmp) == 0: raise ValueError, "Can't parse information file, tag 0x85 not found" self._mainblob = tmp[0][2] tmp = self._mainblob some_id, tmp = tmp[:4], tmp[4:] ascii_field_len = ord(tmp[0]) tmp = tmp[1:] ascii_field, tmp = tmp[:ascii_field_len], tmp[ascii_field_len:] self._maindata = ascii_field.split(" ") if len(tmp) > 0: if tmp[0] == "\x01": tmp = tmp[1:] birthdate_bin, tmp = tmp[:4], tmp[4:] birthdate = binascii.b2a_hex(birthdate_bin) self._birthdate = datetime.date( int(birthdate[0:4]), int(birthdate[4:6]), int(birthdate[6:8]) ) if len(tmp) > 0: print "Warning: unparsed data trailing: %r" % tmp
def _parse(self, contents): self._rawdata = contents self._tlvdata = TLV_utils.unpack(contents) tmp = TLV_utils.tlv_find_tag(self._tlvdata, 0xEA, num_results=1) if len(tmp) == 0: raise ValueError, "Can't parse information file, tag 0xEA not found" tmp = TLV_utils.tlv_find_tag(tmp, 0x85, num_results=1) if len(tmp) == 0: raise ValueError, "Can't parse information file, tag 0x85 not found" self._mainblob = tmp[0][2] tmp = self._mainblob some_id, tmp = tmp[:4], tmp[4:] ascii_field_len = ord(tmp[0]) tmp = tmp[1:] ascii_field, tmp = tmp[:ascii_field_len], tmp[ascii_field_len:] self._maindata = ascii_field.split(" ") if len(tmp) > 0: if tmp[0] == "\x01": tmp = tmp[1:] birthdate_bin, tmp = tmp[:4], tmp[4:] birthdate = binascii.b2a_hex(birthdate_bin) self._birthdate = datetime.date(int(birthdate[0:4]), int(birthdate[4:6]), int(birthdate[6:8])) if len(tmp) > 0: print "Warning: unparsed data trailing: %r" % tmp
def parse_DG1(self, contents): structure = TLV_utils.unpack(contents) try: mrz = TLV_utils.tlv_find_tag(structure, 0x5F1F, 1)[0][2] except IndexError: raise PassportParseError, "Could not find MRZ information in DG1" # Length of an MRZ line is either 30+5 or 31+5 or 39+5, depending on document type. (LDS technical report 2004, section 16.1) mrz_data = (mrz[:len(mrz)/2], mrz[len(mrz)/2:]) self.dg1_mrz = mrz_data self._parse_mrz(mrz_data)
def parse_DG1(self, contents): structure = TLV_utils.unpack(contents) try: mrz = TLV_utils.tlv_find_tag(structure, 0x5F1F, 1)[0][2] except IndexError: raise PassportParseError, "Could not find MRZ information in DG1" # Length of an MRZ line is either 30+5 or 31+5 or 39+5, depending on document type. (LDS technical report 2004, section 16.1) mrz_data = (mrz[:len(mrz) / 2], mrz[len(mrz) / 2:]) self.dg1_mrz = mrz_data self._parse_mrz(mrz_data)
def process_apdu(self, apdu): if apdu.cla & 0x0c in (0x0c, 0x08): tlv_data = TLV_utils.unpack(apdu.data, with_marks = apdu.marks, include_filler=True) tlv_data = self.encrypt_command(tlv_data) tlv_data = self.authenticate_command(apdu, tlv_data) data = TLV_utils.pack(tlv_data, recalculate_length = True) new_apdu = C_APDU(apdu, data = data) return new_apdu else: return apdu
def process_rapdu(self, rapdu): result = rapdu if self.last_c_apdu.cla & 0x0c in (0x0c, 0x08): tlv_c_data = TLV_utils.unpack(self.last_c_apdu.data) must_authenticate = False must_decrypt = False for data in tlv_c_data: if data[0] & ~0x01 == 0xBA: for response_template in data[2]: if response_template[0] == 0x8E: must_authenticate = True if response_template[0] & ~0x01 in (0x84, 0x86): must_decrypt = True if must_authenticate or must_decrypt: tlv_data = TLV_utils.unpack(rapdu.data, include_filler=True) try: if must_authenticate: tlv_data = self.authenticate_response(tlv_data) if must_decrypt: tlv_data = self.decrypt_response(tlv_data) #data = TLV_utils.pack(tlv_data, recalculate_length = True) data, sw = self.deformat_response(tlv_data, rapdu.sw) new_apdu = R_APDU(rapdu, data = data, sw = sw) result = new_apdu except ValueError: print "Warning: Can't authenticate/decrypt response due to exception being raised" traceback.print_exc(limit=2) return result
def cmd_passive_auth(self, verbose=1): "Perform passive authentication" hashes = {} result = "" i = 0 for name in ("DG1", "DG2", "SOD"): fid = None for n, f in self.INTERESTING_FILES: if n == name: fid = f break if fid is None: return i += 1 result = self.open_file(fid, 0x0c) if self.check_sw(result.sw): contents, sw = self.read_binary_file() #self.last_result = R_APDU(contents + self.last_sw) if name != "SOD": hashes[i] = crypto_utils.hash("SHA", contents) else: result = self.verify_cms(contents[4:]) #print hexdump(result) #print "DG1: %s" % hexdump(hashes[i]) #print "DG2: %s" % hexdump(hashes[2]) res = TLV_utils.tlv_find_tag(TLV_utils.unpack(result), 0x04) if len(res) == 0: print "failed to verify EF.SOD" return else: print "verified EF.SOD" i = 0 for tag, length, hash in res: i += 1 if hexdump(hashes[i]) == hexdump(hash): print "DG%d hash verified: %s" % (i, binascii.b2a_hex(hash)) else: print "DG%d hash failed:" % i print "was: %s" % binascii.b2a_hex(hashes[i]) print "expected: %s" % binascii.b2a_hex(hash) return
def list_x(self, x): "Get a list of x objects, where x is one of 0 (DFs) or 1 (EFs) or 2 (DFs and EFs)" ## FIXME I just guessed this information result = self.send_apdu(C_APDU(self.APDU_LIST_X, p1=x)) files = [] unpacked = TLV_utils.unpack(result.data) for tag, length, value in unpacked: if isinstance(value, list): for tag, length, value in value: if tag == 0x86: files.append(value) else: if tag == 0x86: files.append(value) return files
def parse(self, config): structure = TLV_utils.unpack(config) for data in structure: tag, length, value = data if tag == 0x80: self.mode = ord(value[0]) & 1 algorithm = (ord(value[0]) >> 2) & 0x7 self.algorithm = algorithm elif tag in (0x83, 0x84): self.keyref = ord(value) self.keytype = tag elif tag == 0x85: self.iv = "\x00" * 8 elif tag == 0x87: self.iv = value elif tag == 0x88: self.iv = None ## FIXME else: print "Warning: Unknown MSE parameters: tag 0x%02x, length 0x%02x, value: %s" % (tag, length, utils.hexdump(value, short=True))
def from_data(cls, data, offset = 0, length = None, **kwargs): if length is None: length = len(data) - offset structure = TLV_utils.unpack(data[offset:offset+length]) return cls(structure=structure, **kwargs)
def verify_cms(self, data): """Verify a pkcs7 SMIME message""" from M2Crypto import SMIME, X509, BIO import base64, TLV_utils, os data3 = "-----BEGIN PKCS7-----\n" data3 += base64.encodestring(data) data3 += "-----END PKCS7-----" #print data3 p7_bio = BIO.MemoryBuffer(data3) # Instantiate an SMIME object. s = SMIME.SMIME() # TODO: ugly hack for M2Crypto body = TLV_utils.tlv_find_tag(TLV_utils.unpack(data), 0xA0, 1)[0][2] thecert = TLV_utils.tlv_find_tag(body, 0xA0, 2)[1][2] cert_bio = BIO.MemoryBuffer(TLV_utils.pack(thecert)) # Load the signer's cert. x509 = X509.load_cert_bio(cert_bio, format=0) sk = X509.X509_Stack() sk.push(x509) s.set_x509_stack(sk) country = str(x509.get_issuer()).split('/')[1][2:] #print country cacert = country + "-cacert.der" #print cacert msgErr = "couldn't parse certificate to determine URL for CACert, search the intertubes," msg = "download CACert (convert to DER if necessary) and save it as \n\"%s\"" % cacert if not os.path.isfile(cacert): try: v = x509.get_ext("certificatePolicies").get_value() start = v.find("CPS: ") if start != -1: url = v[start + 5:-1] print "visit %s" % url, msg else: print msgErr, msg except Exception: print msgErr, msg return "" # Load the signer's CA cert. st = X509.X509_Store() #st.load_info('main') x509CA = X509.load_cert(cacert, format=0) st.add_x509(x509CA) s.set_x509_store(st) # Load the data, verify it. #p7, data = SMIME.smime_load_pkcs7_bio(p7_bio) p7 = SMIME.load_pkcs7_bio(p7_bio) v = s.verify(p7) return v
def parse_DG7(self, contents): self.dg7_tlv = TLV_utils.unpack(contents)
def from_data(cls, data, offset=0, length=None, **kwargs): if length is None: length = len(data) - offset structure = TLV_utils.unpack(data[offset:offset + length]) return cls(structure=structure, **kwargs)