def findAllGenerators():
for n in range(2, 9):
gen, sample = findNBitGenerators(n)
print "\n%d-bit generators in the AES Galois Field:" % n
hexDump(gen, prefix="\t")
print "\nSample sequence:"
hexDump(sample, prefix="\t")
def findAllGenerators():
for n in range(2, 9):
gen, sample = findNBitGenerators(n)
print "\n%d-bit generators in the AES Galois Field:" % n
hexDump(gen, prefix="\t")
print "\nSample sequence:"
hexDump(sample, prefix="\t")
def testCRCBytes():
# Try out our experimental CRC function!
inputString = map(ord, "this is a test.....\0\0\0\0\0\1\1\1\1\1\2\2\2\2\2\3\3\3\3\3")
crcString = []
reg = 0
for byte in inputString:
reg = xcrc(byte, reg)
crcString.append(reg)
print "\nTest string:"
hexDump(inputString, prefix="\t")
print "\nCRC after each byte of test string:"
hexDump(crcString, prefix="\t")
def testCRCBytes():
# Try out our experimental CRC function!
inputString = map(
ord, "this is a test.....\0\0\0\0\0\1\1\1\1\1\2\2\2\2\2\3\3\3\3\3")
crcString = []
reg = 0
for byte in inputString:
reg = xcrc(byte, reg)
crcString.append(reg)
print "\nTest string:"
hexDump(inputString, prefix="\t")
print "\nCRC after each byte of test string:"
hexDump(crcString, prefix="\t")
def testCRCBitErrors():
print "\nEvaluating bit-error detection for generators:"
best = None
for gen in findNBitGenerators(8)[0]:
if not testOneToOneProperty(gen):
print "\t%02x: (not 1:1)" % gen
continue
hist = bitErrorDetectionHistogram(gen)
score = scoreHistogram(hist)
print "\t%02x: Score %f" % (gen, score)
if best is None or score < best[0]:
best = (score, gen, hist)
print "\nHistogram for best (%02x):" % best[1]
hexDump(best[2], prefix="\t")
def testCRCBitErrors():
print "\nEvaluating bit-error detection for generators:"
best = None
for gen in findNBitGenerators(8)[0]:
if not testOneToOneProperty(gen):
print "\t%02x: (not 1:1)" % gen
continue
hist = bitErrorDetectionHistogram(gen)
score = scoreHistogram(hist)
print "\t%02x: Score %f" % (gen, score)
if best is None or score < best[0]:
best = (score, gen, hist)
print "\nHistogram for best (%02x):" % best[1]
hexDump(best[2], prefix="\t")
