Change in pysim[master]: commands: add features to verify data written to files

[dexter]

dexter has uploaded this change for review. ( https://gerrit.osmocom.org/c/pysim/+/18211 )


Change subject: commands: add features to verify data written to files
......................................................................

commands: add features to verify data written to files

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
---
M pySim/commands.py
1 file changed, 20 insertions(+), 4 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/11/18211/1

diff --git a/pySim/commands.py b/pySim/commands.py
index 30e995c..e077289 100644
--- a/pySim/commands.py
+++ b/pySim/commands.py
@@ -122,10 +122,18 @@
 		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 @@
 		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 @@
 		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)

-- 
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Gerrit-Project: pysim
Gerrit-Branch: master
Gerrit-Change-Id: I7be842004102f4998af376790c97647c107be3d5
Gerrit-Change-Number: 18211
Gerrit-PatchSet: 1
Gerrit-Owner: dexter <pmaier at sysmocom.de>
Gerrit-MessageType: newchange
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