103 lines
4.2 KiB
Python
103 lines
4.2 KiB
Python
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import array
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import numpy as np
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from tests.awre.AWRETestCase import AWRETestCase
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from urh.awre.CommonRange import ChecksumRange
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from urh.awre.FormatFinder import FormatFinder
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from urh.awre.MessageTypeBuilder import MessageTypeBuilder
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from urh.awre.ProtocolGenerator import ProtocolGenerator
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from urh.awre.engines.ChecksumEngine import ChecksumEngine
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from urh.signalprocessing.FieldType import FieldType
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from urh.util import util
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from urh.util.GenericCRC import GenericCRC
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from urh.cythonext import util as c_util
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class TestChecksumEngine(AWRETestCase):
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def test_find_crc8(self):
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messages = ["aabbcc7d", "abcdee24", "dacafe33"]
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message_bits = [np.array(msg, dtype=np.uint8) for msg in map(util.hex2bit, messages)]
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checksum_engine = ChecksumEngine(message_bits, n_gram_length=8)
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result = checksum_engine.find()
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self.assertEqual(len(result), 1)
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checksum_range = result[0] # type: ChecksumRange
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self.assertEqual(checksum_range.length, 8)
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self.assertEqual(checksum_range.start, 24)
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reference = GenericCRC()
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reference.set_polynomial_from_hex("0x07")
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self.assertEqual(checksum_range.crc.polynomial, reference.polynomial)
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self.assertEqual(checksum_range.message_indices, {0, 1, 2})
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def test_find_crc16(self):
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messages = ["12345678347B", "abcdefffABBD", "cafe1337CE12"]
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message_bits = [np.array(msg, dtype=np.uint8) for msg in map(util.hex2bit, messages)]
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checksum_engine = ChecksumEngine(message_bits, n_gram_length=8)
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result = checksum_engine.find()
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self.assertEqual(len(result), 1)
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checksum_range = result[0] # type: ChecksumRange
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self.assertEqual(checksum_range.start, 32)
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self.assertEqual(checksum_range.length, 16)
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reference = GenericCRC()
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reference.set_polynomial_from_hex("0x8005")
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self.assertEqual(checksum_range.crc.polynomial, reference.polynomial)
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self.assertEqual(checksum_range.message_indices, {0, 1, 2})
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def test_find_crc32(self):
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messages = ["deadcafe5D7F3F5A", "47111337E3319242", "beefaffe0DCD0E15"]
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message_bits = [np.array(msg, dtype=np.uint8) for msg in map(util.hex2bit, messages)]
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checksum_engine = ChecksumEngine(message_bits, n_gram_length=8)
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result = checksum_engine.find()
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self.assertEqual(len(result), 1)
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checksum_range = result[0] # type: ChecksumRange
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self.assertEqual(checksum_range.start, 32)
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self.assertEqual(checksum_range.length, 32)
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reference = GenericCRC()
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reference.set_polynomial_from_hex("0x04C11DB7")
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self.assertEqual(checksum_range.crc.polynomial, reference.polynomial)
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self.assertEqual(checksum_range.message_indices, {0, 1, 2})
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def test_find_generated_crc16(self):
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mb = MessageTypeBuilder("data")
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mb.add_label(FieldType.Function.PREAMBLE, 8)
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mb.add_label(FieldType.Function.SYNC, 16)
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mb.add_label(FieldType.Function.LENGTH, 8)
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mb.add_label(FieldType.Function.DATA, 32)
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mb.add_checksum_label(16, GenericCRC.from_standard_checksum("CRC16 CCITT"))
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mb2 = MessageTypeBuilder("data2")
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mb2.add_label(FieldType.Function.PREAMBLE, 8)
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mb2.add_label(FieldType.Function.SYNC, 16)
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mb2.add_label(FieldType.Function.LENGTH, 8)
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mb2.add_label(FieldType.Function.DATA, 16)
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mb2.add_checksum_label(16, GenericCRC.from_standard_checksum("CRC16 CCITT"))
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pg = ProtocolGenerator([mb.message_type, mb2.message_type], syncs_by_mt={mb.message_type: "0x1234", mb2.message_type: "0x1234"})
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num_messages = 5
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for i in range(num_messages):
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pg.generate_message(data="{0:032b}".format(i), message_type=mb.message_type)
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pg.generate_message(data="{0:016b}".format(i), message_type=mb2.message_type)
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#self.save_protocol("crc16_test", pg)
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self.clear_message_types(pg.protocol.messages)
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ff = FormatFinder(pg.protocol.messages)
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ff.run()
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self.assertEqual(len(ff.message_types), 2)
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for mt in ff.message_types:
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checksum_label = mt.get_first_label_with_type(FieldType.Function.CHECKSUM)
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self.assertEqual(checksum_label.length, 16)
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self.assertEqual(checksum_label.checksum.caption, "CRC16 CCITT")
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