Python TLV_utils.tlv_find_tag方法代码示例

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
 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

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
 def set_passport(self, passport):
     self.passport = passport
     
     for sources, transform, destinations in self.PROPERTY_TRANSFORMATIONS:
         values = [getattr(passport, src) for src in sources]
         transformed = transform(passport, values)
         for index, dst in enumerate(destinations):
             widget = self.main_window_xml.get_widget(dst)
             if not self.format_strings.has_key(dst):
                 self.format_strings[dst] = widget.get_label()
             widget.set_label( self.format_strings[dst] % transformed[index] )
     
     data = []
     if hasattr(passport, "dg2_cbeff") and passport.dg2_cbeff is not None:
         for biometric in passport.dg2_cbeff.biometrics:
             data = data + [(a,b,"Encoded Face") for (a,b) in biometric.get_images()]
     
     for dg, tag, type in ( ("dg5", 0x5F40, "Displayed Portrait"), ("dg7", 0x5F43, "Displayed Signature or Usual Mark") ):
         if hasattr(passport, "%s_tlv" % dg):
             structure = getattr(passport, "%s_tlv" % dg)
             if structure is not None:
                 hits = TLV_utils.tlv_find_tag(structure, tag)
                 for t,l,v in hits:
                     data.append( ("jpg",v,type) )
     
     self._set_images(data)

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
 def __init__(self, structure, top_tag = 0x7F60):
     "Create a new CBEFF instance from a nested TLV structure (as returned by TLV_utils.unpack)."
     
     self.biometrics = []
     self.unknown_biometrics = []
     
     blocks = TLV_utils.tlv_find_tag(structure, top_tag)
     for block in blocks:
         self.addbiometric(block[2])

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
 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)

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
    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

# 需要导入模块: import TLV_utils [as 别名]
# 或者: from TLV_utils import tlv_find_tag [as 别名]
    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