def check_crc32(s):
if len(s) < 4:
return (False, '')
msg = s[:-4]
print "msg = '%s'" % (msg,)
actual = digital.crc32(msg)
(expected,) = struct.unpack(">I", s[-4:])
print "actual =", hex(actual), "expected =", hex(expected)
return (actual == expected, msg)
def gen_and_append_crc32(s):
crc = digital.crc32(s)
return s + struct.pack(">I", gru.hexint(crc) & 0xFFFFFFFF)
