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commands: add features to verify data written to files

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When writing to files we often just write without making sure that the
actual file contents actually written. Lets add features to do a
read-after-write verification when writing to files.

Change-Id: I7be842004102f4998af376790c97647c107be3d5
This commit is contained in:
Philipp Maier
2020-05-11 22:51:37 +02:00
committed by Harald Welte
parent 32daaf5470
commit 30eb8ca6aa
1 changed files with 20 additions and 4 deletions
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24
pySim/commands.py
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@@ -122,10 +122,18 @@ class SimCardCommands(object):
pdu = self.cla_byte + 'b0%04x%02x' % (offset, (min(256, length) & 0xff))
return self._tp.send_apdu(pdu)
def update_binary(self, ef, data, offset=0):
def update_binary(self, ef, data, offset=0, verify=False):
self.select_file(ef)
pdu = self.cla_byte + 'd6%04x%02x' % (offset, len(data) // 2) + data
return self._tp.send_apdu_checksw(pdu)
res = self._tp.send_apdu_checksw(pdu)
if verify:
self.verify_binary(ef, data, offset)
return res
def verify_binary(self, ef, data, offset=0):
res = self.read_binary(ef, len(data) // 2, offset)
if res[0].lower() != data.lower():
raise ValueError('Binary verification failed (expected %s, got %s)' % (data.lower(), res[0].lower()))
def read_record(self, ef, rec_no):
r = self.select_file(ef)
@@ -133,7 +141,7 @@ class SimCardCommands(object):
pdu = self.cla_byte + 'b2%02x04%02x' % (rec_no, rec_length)
return self._tp.send_apdu(pdu)
def update_record(self, ef, rec_no, data, force_len=False):
def update_record(self, ef, rec_no, data, force_len=False, verify=False):
r = self.select_file(ef)
if not force_len:
rec_length = self.__record_len(r)
@@ -142,7 +150,15 @@ class SimCardCommands(object):
else:
rec_length = len(data) // 2
pdu = (self.cla_byte + 'dc%02x04%02x' % (rec_no, rec_length)) + data
return self._tp.send_apdu_checksw(pdu)
res = self._tp.send_apdu_checksw(pdu)
if verify:
self.verify_record(ef, rec_no, data)
return res
def verify_record(self, ef, rec_no, data):
res = self.read_record(ef, rec_no)
if res[0].lower() != data.lower():
raise ValueError('Record verification failed (expected %s, got %s)' % (data.lower(), res[0].lower()))
def record_size(self, ef):
r = self.select_file(ef)