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pySim.ota.OtaDialectSms: Implement command decoding

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So far we only implemented command encoding and response decoding.
Let's also add command decoding, which is useful for example when
decoding protocol traces.

Change-Id: Id666cea8a91a854209f3c19c1f09b512bb493c85
This commit is contained in:
Harald Welte
2024-06-09 16:18:51 +02:00
committed by laforge
parent 8bd551af32
commit 32401a54e6
2 changed files with 66 additions and 7 deletions
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28
tests/test_ota.py
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@@ -65,14 +65,19 @@ class Test_SMS_AES128(unittest.TestCase):
def test_cmd_aes128_ciphered(self):
spi = self.spi_base
r = self.dialect.encode_cmd(self.od, self.tar, spi, h2b('00a40004023f00'))
apdu = h2b('00a40004023f00')
r = self.dialect.encode_cmd(self.od, self.tar, spi, apdu)
self.assertEqual(b2h(r), '00281506192222b00011e87cceebb2d93083011ce294f93fc4d8de80da1abae8c37ca3e72ec4432e5058')
# also test decoder
dec_tar, dec_spi, dec_apdu = self.dialect.decode_cmd(self.od, r)
self.assertEqual(b2h(apdu), b2h(dec_apdu))
self.assertEqual(b2h(dec_tar), b2h(self.tar))
self.assertEqual(dec_spi, spi)
class Test_SMS_3DES(unittest.TestCase):
tar = h2b('b00000')
apdu = h2b('00a40000023f00')
"""Test the OtaDialectSms for 3DES algorithms."""
def __init__(self, foo, **kwargs):
super().__init__(foo, **kwargs)
@@ -134,21 +139,26 @@ class Test_SMS_3DES(unittest.TestCase):
spi = self.spi_base
spi['ciphering'] = True
spi['rc_cc_ds'] = 'no_rc_cc_ds'
r = self.dialect.encode_cmd(self.od, self.tar, spi, h2b('00a40000023f00'))
r = self.dialect.encode_cmd(self.od, self.tar, spi, self.apdu)
self.assertEqual(b2h(r), '00180d04193535b00000e3ec80a849b554421276af3883927c20')
# also test decoder
dec_tar, dec_spi, dec_apdu = self.dialect.decode_cmd(self.od, r)
self.assertEqual(b2h(self.apdu), b2h(dec_apdu))
self.assertEqual(b2h(dec_tar), b2h(self.tar))
self.assertEqual(dec_spi, spi)
def test_cmd_3des_signed(self):
spi = self.spi_base
spi['ciphering'] = False
spi['rc_cc_ds'] = 'cc'
r = self.dialect.encode_cmd(self.od, self.tar, spi, h2b('00a40000023f00'))
r = self.dialect.encode_cmd(self.od, self.tar, spi, self.apdu)
self.assertEqual(b2h(r), '1502193535b00000000000000000072ea17bdb72060e00a40000023f00')
def test_cmd_3des_none(self):
spi = self.spi_base
spi['ciphering'] = False
spi['rc_cc_ds'] = 'no_rc_cc_ds'
r = self.dialect.encode_cmd(self.od, self.tar, spi, h2b('00a40000023f00'))
r = self.dialect.encode_cmd(self.od, self.tar, spi, self.apdu)
self.assertEqual(b2h(r), '0d00193535b0000000000000000000a40000023f00')
@@ -273,6 +283,12 @@ class SmsOtaTestCase(OtaTestCase):
#print("tpdu: %s" % b2h(tpdu.to_bytes()))
self.assertEqual(b2h(tpdu.to_bytes()), t['request']['encoded_tpdu'])
# also test decoder
dec_tar, dec_spi, dec_apdu = self.dialect.decode_cmd(kset, outp)
self.assertEqual(b2h(t['request']['apdu']), b2h(dec_apdu))
self.assertEqual(b2h(dec_tar), b2h(self.tar))
self.assertEqual(dec_spi, t['spi'])
def test_decode_resp(self):
for t in SmsOtaTestCase.testdatasets:
with self.subTest(name=t['name']):