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More flexible SW parsing 

git-svn-id: svn+ssh://localhost/home/henryk/svn/cyberflex-shell/trunk@30 f711b948-2313-0410-aaa9-d29f33439f0b
This commit is contained in:
henryk 2005-10-03 07:02:49 +00:00
parent 7d4a29ce4e
commit d8dab69c26
1 changed files with 28 additions and 8 deletions
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36
cards/generic_card.py
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@ -1,4 +1,4 @@
import crypto_utils, utils, pycsc, binascii
import crypto_utils, utils, pycsc, binascii, fnmatch
from utils import APDU
DEBUG = True
@ -10,8 +10,18 @@ class Card:
SW_OK = '\x90\x00'
ATRS = []
DRIVER_NAME = "Generic"
STATUS_WORDS = {
## 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.
## Hexadecimal characters MUST be in uppercase. The values that four-byte
## strings map to may be either format strings, that can make use of the
## keyword substitutions for SW1 and SW2 or a callable accepting two arguments
## (SW1, SW2) that returns a string.
STATUS_WORDS = {
SW_OK: "Normal execution",
'61??': "%(SW2)i (0x%(SW2)02x) bytes of response data can be retrieved with GetResponse.",
'6C??': "Bad value for LE, 0x%(SW2)02x is the correct value.",
'63C?': lambda SW1,SW2: "The counter has reached the value '%i'" % (SW2%16)
}
def __init__(self, card = None):
@ -108,9 +118,19 @@ class Card:
def decode_statusword(self):
if self.last_sw is None:
return "No command executed so far"
elif self.last_sw[0] == "\x61":
return "%i (0x%02x) bytes of response data can be retrieved with GetResponse." % ( (ord(self.last_sw[1])) * 2 )
elif self.last_sw[0] == "\x6C":
return "Bad value for LE, 0x%02x is the correct value." % ord(self.last_sw[1])
else:
return self.STATUS_WORDS.get(self.last_sw, "Unknown SW: %s" % binascii.b2a_hex(self.last_sw))
else:
desc = self.STATUS_WORDS.get(self.last_sw)
if desc is not None:
return desc
else:
target = binascii.b2a_hex(self.last_sw).upper()
for (key, value) in self.STATUS_WORDS.items():
if fnmatch.fnmatch(target, key):
if isinstance(value, str):
return value % { "SW1": ord(self.last_sw[0]),
"SW2": ord(self.last_sw[1]) }
elif callable(value):
return value( ord(self.last_sw[0]),
ord(self.last_sw[1]) )
return "Unknown SW: %s" % binascii.b2a_hex(self.last_sw)