def test_configure_crc_parameters(self):
crc_label = ChecksumLabel(
"crc_label", 25, 120, 0,
FieldType("crc", FieldType.Function.CHECKSUM))
crc_widget_controller = ChecksumWidgetController(
crc_label, Message([0] * 150, 0, MessageType("test")), 0)
crc = GenericCRC(
polynomial=list(GenericCRC.DEFAULT_POLYNOMIALS.keys())[0])
self.assertEqual(crc_widget_controller.ui.lineEditCRCPolynomial.text(),
crc.polynomial_as_hex_str)
self.assertEqual(crc_widget_controller.ui.lineEditStartValue.text(),
util.bit2hex(crc.start_value))
self.assertEqual(crc_widget_controller.ui.lineEditFinalXOR.text(),
util.bit2hex(crc.final_xor))
crc_widget_controller.ui.comboBoxCRCFunction.setCurrentIndex(2)
crc.polynomial = crc.choose_polynomial(2)
self.assertEqual(crc_widget_controller.ui.lineEditCRCPolynomial.text(),
crc.polynomial_as_hex_str)
crc_widget_controller.ui.lineEditCRCPolynomial.setText("abcde")
crc_widget_controller.ui.lineEditCRCPolynomial.editingFinished.emit()
self.assertEqual(crc_label.checksum.polynomial,
array.array("B", [1]) + util.hex2bit("abcde"))
crc_widget_controller.ui.lineEditStartValue.setText("12345")
crc_widget_controller.ui.lineEditStartValue.editingFinished.emit()
self.assertEqual(util.bit2hex(crc_label.checksum.start_value), "12345")
crc_widget_controller.ui.lineEditFinalXOR.setText("cccaa")
crc_widget_controller.ui.lineEditFinalXOR.editingFinished.emit()
self.assertEqual(util.bit2hex(crc_label.checksum.final_xor), "cccaa")
def test_configure_crc_parameters(self):
crc_label = ChecksumLabel("crc_label", 25, 120, 0, FieldType("crc", FieldType.Function.CHECKSUM))
crc_widget_controller = ChecksumWidgetController(crc_label, Message([0] * 150, 0, MessageType("test")), 0)
crc = GenericCRC(polynomial=list(GenericCRC.DEFAULT_POLYNOMIALS.keys())[0])
self.assertEqual(crc_widget_controller.ui.lineEditCRCPolynomial.text(), crc.polynomial_as_hex_str)
self.assertEqual(crc_widget_controller.ui.lineEditStartValue.text(), util.bit2hex(crc.start_value))
self.assertEqual(crc_widget_controller.ui.lineEditFinalXOR.text(), util.bit2hex(crc.final_xor))
crc_widget_controller.ui.comboBoxCRCFunction.setCurrentIndex(2)
crc.polynomial = crc.choose_polynomial(2)
self.assertEqual(crc_widget_controller.ui.lineEditCRCPolynomial.text(), crc.polynomial_as_hex_str)
crc_widget_controller.ui.lineEditCRCPolynomial.setText("abcde")
crc_widget_controller.ui.lineEditCRCPolynomial.editingFinished.emit()
self.assertEqual(crc_label.checksum.polynomial, array.array("B", [1]) + util.hex2bit("abcde"))
crc_widget_controller.ui.lineEditStartValue.setText("12345")
crc_widget_controller.ui.lineEditStartValue.editingFinished.emit()
self.assertEqual(util.bit2hex(crc_label.checksum.start_value), "12345")
crc_widget_controller.ui.lineEditFinalXOR.setText("cccaa")
crc_widget_controller.ui.lineEditFinalXOR.editingFinished.emit()
self.assertEqual(util.bit2hex(crc_label.checksum.final_xor), "cccaa")
def test_different_crcs(self):
c = GenericCRC(polynomial="16_standard", start_value=False, final_xor=False,
reverse_polynomial=False, reverse_all=False, lsb_first=False, little_endian=False)
bitstring_set = [
"101001001010101010101011101111111000000000000111101010011101011",
"101001001010101101111010110111101010010110111010",
"00000000000000000000000000000000100000000000000000000000000000000001111111111111",
"1111111111111111111111111111111110111111111111111111110111111111111111110000000000"
"1"]
for j in c.DEFAULT_POLYNOMIALS:
c.polynomial = c.choose_polynomial(j)
for i in bitstring_set:
# Standard
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
# Special final xor
c.final_xor = c.str2bit("0000111100001111")
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.final_xor = [False] * 16
# Special start value
c.start_value = c.str2bit("1010101010101010")
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.start_value = [False] * 16
# reverse_polynomial
c.reverse_polynomial = True
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.reverse_polynomial = False
# lsb_first
c.lsb_first = True
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.lsb_first = False
# little_endian
c.little_endian = True
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.little_endian = False
# reverse all
c.reverse_all = True
crc_new = c.crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_new, crc_old)
c.reverse_all = False
def test_not_aligned_data_len(self):
c = GenericCRC(polynomial="16_standard", start_value=False, final_xor=False,
reverse_polynomial=False, reverse_all=False, lsb_first=False, little_endian=False)
polynomials = ["8_standard", "16_standard", "16_ccitt", "16_dnp"]
crcs = {"8_standard": 0xd5, "16_standard": 0x8005, "16_ccitt": 0x1021, "16_dnp": 0x3d65}
for j in polynomials:
c.polynomial = c.choose_polynomial(j)
inpt = "1"
for i in range(0, 32):
val = c.bit2int(c.crc(c.str2bit(inpt)))
self.assertEqual(val, crcs[j])
inpt = "0" + inpt
def test_different_crcs_fast(self):
c = GenericCRC(polynomial="16_standard",
start_value=False,
final_xor=False,
reverse_polynomial=False,
reverse_all=False,
lsb_first=False,
little_endian=False)
bitstring_set = [
"10101010", "00000001", "000000010", "000000011",
"0000000100000001",
"101001001010101010101011101111111000000000000111101010011101011",
"101001001010101101111010110111101010010110111010",
"00000000000000000000000000000000100000000000000000000000000000000001111111111111",
"1111111111111111111111111111111110111111111111111111110111111111111111110000000000"
"1"
]
for j in c.DEFAULT_POLYNOMIALS:
c.polynomial = c.choose_polynomial(j)
for i in bitstring_set:
for cache in [8, 4, 7, 12, 16]:
c.calculate_cache(cache)
# Standard
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
# Special final xor
c.final_xor = c.str2bit("0000111100001111")
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.final_xor = [False] * 16
# Special start value
c.start_value = c.str2bit("1010101010101010")
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.start_value = [False] * 16
# little_endian
c.little_endian = True
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.little_endian = False
# reverse all
c.reverse_all = True
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.reverse_all = False
# reverse_polynomial
# We need to clear the cache before and after
c.cache = []
#
c.reverse_polynomial = True
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.reverse_polynomial = False
#
c.cache = []
# TODO: Does only work for cachesize = 8
# lsb_first
c.calculate_cache(8)
c.lsb_first = True
crc_new = c.cached_crc(c.str2bit(i))
crc_old = c.reference_crc(c.str2bit(i))
self.assertEqual(crc_old, crc_new)
c.lsb_first = False