def test_Decode(self):
msg1 = np.array([34, 20, 5, 42, 26, 9, 3, 5, 60, 6, 24, 22])
msg2 = np.array([34, 16, 49, 31, 2, 9, 16, 22, 41, 38, 24, 22])
expectedresult1 = "KB2BBC KA1AAB DD44"
expectedresult2 = "KA1AAB KB2BBC DD44"
result1 = jt.decode(msg1).rstrip()
result2 = jt.decode(msg2).rstrip()
self.assertEqual(len(result1), len(expectedresult1))
self.assertEqual(len(result2), len(expectedresult2))
self.assertEqual(result1, expectedresult1)
self.assertEqual(result2, expectedresult2)
def decodemessages(jt65data, verbose=False):
# Decode valid JT65 messages from array of JT65 data
jt65msgs = []
for index, value in enumerate(jt65data):
jt65msg = jt.decode(jt.unprepmsg(value))
if verbose:
print "JT65 Message " + str(index) + " : " + jt65msg
jt65msgs.append(jt65msg)
return jt65msgs
def deciphersteg(stegdata, cipher, key, aesmode, verbose=False, unprep=True):
# Decipher hidden message from array of data hidden in JT65 errors
stegedmsg = ""
stegedmsgba = np.array(range(0), dtype=np.int32)
statusar = []
for index, value in enumerate(stegdata):
if unprep:
value = jt.unprepsteg(value) # Decode real data from FEC
if cipher == "none":
recoveredtext = jt.decode(value)[0:13]
if verbose:
print "Steg Text in Message " + str(index) + " : " + recoveredtext
stegedmsg += recoveredtext
elif cipher == "XOR" or cipher == "OTP":
thesebytes = jt65tobytes(value)
thisstatus = thesebytes[0:1]
if thisstatus & 0x40 == 0x40:
# This is the last packet, signals how many bytes to read
bytestoread = thisstatus & 0x3F
thisunstegbytes = thesebytes[1:bytestoread + 1]
else:
thisunstegbytes = thesebytes[1:]
if verbose:
print "Steg Data in Message " + str(index) + " : " + str(thisunstegbytes)
stegedmsgba = np.append(stegedmsgba, thisunstegbytes)
else:
thesebytes = jt65tobytes(value)
thisunstegbytes = thesebytes[1:10]
if verbose:
print "Steg Data in Message " + str(index) + " : " + str(thisunstegbytes)
stegedmsgba = np.append(stegedmsgba, thisunstegbytes)
if cipher == "XOR":
if verbose:
print"Cipher Data : " + str(stegedmsgba)
finalcipherdata = (
''.join('{0:02x}'.format(int(e)).decode("hex") for e in stegedmsgba))
if verbose:
print"Cipher Data Hex : " + finalcipherdata
cryptobj = XOR.new(key)
stegedmsg = cryptobj.decrypt(finalcipherdata)
if cipher == "ARC4":
if verbose:
print"Cipher Data : " + str(stegedmsgba)
finalcipherdata = (
''.join('{0:02x}'.format(int(e)).decode("hex") for e in stegedmsgba))
if verbose:
print"Cipher Data Hex : " + finalcipherdata
tempkey = SHA.new(key).digest()
cryptobj = ARC4.new(tempkey)
stegedmsg = cryptobj.decrypt(finalcipherdata)
if cipher == "AES":
if verbose:
print"Cipher Data : " + str(stegedmsgba)
finalcipherdata = (
''.join('{0:02x}'.format(int(e)).decode("hex") for e in stegedmsgba))
if verbose:
print"Cipher Data Hex : " + finalcipherdata
if aesmode == "ECB":
cryptobj = AES.new(key, AES.MODE_ECB)
elif aesmode == "CBC":
cryptobj = AES.new(key, AES.MODE_CBC, finalcipherdata[0:16])
finalcipherdata = finalcipherdata[16:]
elif aesmode == "CFB":
cryptobj = AES.new(key, AES.MODE_CFB, finalcipherdata[0:16])
finalcipherdata = finalcipherdata[16:]
stegedmsg = cryptobj.decrypt(finalcipherdata)
if cipher == "GPG":
if verbose:
print"Cipher Data : " + str(stegedmsgba)
finalcipherdata = (
''.join('{0:02x}'.format(int(e)).decode("hex") for e in stegedmsgba))
if verbose:
print"Cipher Data Hex : " + finalcipherdata
gpg = GPG()
stegedmsg = gpg.decrypt(finalcipherdata)
stegedmsg = str(stegedmsg)
if cipher == "OTP":
finalcipherdata = (''.join(chr(e) for e in stegedmsgba))
if verbose:
print"Cipher Data : " + str(finalcipherdata)
stegedmsg = otp_decode(str(finalcipherdata), key)
return stegedmsg