ATR reorganisation and extension

initial TCOS code


git-svn-id: svn+ssh://localhost/home/henryk/svn/cyberflex-shell/trunk@57 f711b948-2313-0410-aaa9-d29f33439f0b

cards/generic_card.py

@@ -1,15 +1,18 @@
-import crypto_utils, utils, pycsc, binascii, fnmatch
+import crypto_utils, utils, pycsc, binascii, fnmatch, sre
 from utils import C_APDU, R_APDU
 
 DEBUG = True
 #DEBUG = False
 
 class Card:
+    DRIVER_NAME = "Generic"
     APDU_GET_RESPONSE = C_APDU("\x00\xC0\x00\x00")
     APDU_VERIFY_PIN = C_APDU("\x00\x20\x00\x00")
     SW_OK = '\x90\x00'
+    ## Note: an item in this list must be a tuple of (atr, mask) where atr is a binary
+    ##   string and mask a binary mask. Alternatively mask may be None, then ATR must be a regex
+    ##   to match on the ATRs hexlify representation
     ATRS = []
-    DRIVER_NAME = "Generic"
     ## Note: a key in this dictionary may either be a two-byte string containing
     ## a binary status word, or a four-byte string containing a hexadecimal
     ## status word, possibly with ? characters marking variable nibbles. 
@@ -102,10 +105,14 @@ class Card:
         """Determine whether this class can handle a given pycsc object."""
         ATR = card.status().get("ATR","")
         for (knownatr, mask) in cls.ATRS:
-            if len(knownatr) != len(ATR):
+            if mask is None:
-                continue
+                if sre.match(knownatr, binascii.hexlify(ATR), sre.I):
-            if crypto_utils.andstring(knownatr, mask) == crypto_utils.andstring(ATR, mask):
+                    return True
-                return True
+            else:
+                if len(knownatr) != len(ATR):
+                    continue
+                if crypto_utils.andstring(knownatr, mask) == crypto_utils.andstring(ATR, mask):
+                    return True
         return False
     can_handle = classmethod(can_handle)
     
@@ -118,10 +125,10 @@ class Card:
         else:
             retval = None
             
-            desc = self.STATUS_WORDS.get(self.last_sw)
+            retval = self.STATUS_WORDS.get(self.last_sw)
-            if desc is not None:
+            if retval is None:
-                retval = desc
+                retval = self.STATUS_WORDS.get(binascii.hexlify(self.last_sw).upper())
-            else:
+            if retval is None:
                 target = binascii.b2a_hex(self.last_sw).upper()
                 for (key, value) in self.STATUS_WORDS.items():
                     if fnmatch.fnmatch(target, key):

cards/iso_7816_4_card.py

@@ -5,9 +5,9 @@ class ISO_7816_4_Card(Card):
     APDU_SELECT_FILE = C_APDU("\x00\xa4\x00\x00")
     DRIVER_NAME = "ISO 7816-4"
     
-    def can_handle(cls, card):
+##    def can_handle(cls, card):
-        return True
+##        return True
-    can_handle = classmethod(can_handle)
+##    can_handle = classmethod(can_handle)
 
     def select_file(self, p1, p2, fid):
         result = self.send_apdu(
@@ -29,7 +29,13 @@ class ISO_7816_4_Card(Card):
             print TLV_utils.decode(result.data)
     
     def cmd_parsetlv(self):
-        print BER_utils.decode(self.last_result)
+        "Decode the TLV data in the last response"
+        print TLV_utils.decode(self.last_result)
+    
+    ATRS = list(Card.ATRS)
+    ATRS.extend( [
+            (".*", None),   ## For now we accept any card
+        ] )
     
     COMMANDS = dict(Card.COMMANDS)
     COMMANDS.update( {

cards/tcos_card.py

@@ -0,0 +1,38 @@
+import utils
+from iso_7816_4_card import *
+
+class TCOS_Card(ISO_7816_4_Card):
+    DRIVER_NAME = "TCOS"
+    APDU_LIST_X = C_APDU("\x80\xaa\x01\x00\x00")
+    
+    def list_x(self, x):
+        "Get a list of x objects, where x is one of 1 (DFs) or 2 (EFs)"
+        result = self.send_apdu(C_APDU(self.APDU_LIST_X, p1=x))
+        
+        tail = result.data
+        result_list = []
+        while len(tail) > 0:
+            head, tail = tail[:2], tail[2:]
+            result_list.append(head)
+        return result_list
+    
+    def cmd_listdirs(self):
+        "List DFs in current DF"
+        result = self.list_x(1)
+        print "DFs: " + ", ".join([utils.hexdump(a, short=True) for a in result])
+    
+    def cmd_listfiles(self):
+        "List EFs in current DF"
+        result = self.list_x(2)
+        print "EFs: " + ", ".join([utils.hexdump(a, short=True) for a in result])
+    
+    ATRS = list(Card.ATRS)
+    ATRS.extend( [
+            ("3bba96008131865d0064057b0203318090007d", None),
+        ] )
+    
+    COMMANDS = dict(ISO_7816_4_Card.COMMANDS)
+    COMMANDS.update( {
+        "list_dirs": cmd_listdirs,
+        "list_files": cmd_listfiles,
+        } )