def decrypted_qr(master_pass, aes_key, img):
key = makeqr.gen_aes_key(master_pass, aes_key)
scanner = zbar.ImageScanner()
# obtain image data
pil = Image.open(img).convert('L')
width, height = pil.size
raw = pil.tostring()
# wrap image data
image = zbar.Image(width, height, 'Y800', raw)
# scan the image for barcodes
scanner.scan(image)
# extract results
for symbol in image:
# do something useful with results
if str(symbol.type) != 'QRCODE':
continue
b64 = symbol.data
#~ print b64
data = base64.b64decode(b64)
iv = data[:16]
ciphertext = data[16:]
return unpad(decrypt(key, iv, ciphertext))
return None
def test_encryption_decryption(self): master_pass = "".join(random.sample(string.letters, 10)) aes_key = "".join(random.sample(string.letters, 16)) plaintext = "".join(random.sample(string.letters, 50)) key = makeqr.gen_aes_key(master_pass, aes_key) iv, ciphertext = makeqr.encrypt(key, plaintext) self.assertNotEqual(plaintext, ciphertext) self.assertEqual(plaintext, readqr.decrypt(key, iv, ciphertext))
def test_keygen(self):
master_pass = "".join(random.sample(string.letters, 10))
aes_key = "".join(random.sample(string.letters, 16))
# No IV dependency.
key = makeqr.gen_aes_key(master_pass, aes_key)
key2 = makeqr.gen_aes_key(master_pass, aes_key)
self.assertEqual(key,key2)
# Wrong password should make different key.
wrong_password_key = makeqr.gen_aes_key("test122", aes_key)
self.assertNotEqual(key, wrong_password_key)
# Wrong aes pub-key should make different key
wrong_aes_key = makeqr.gen_aes_key(master_pass, "testtesttesttess")
self.assertNotEqual(key, wrong_aes_key)
# Different number of rounds should make different key
orig_value = makeqr.NUMBER_OF_AES_ROUNDS
while makeqr.NUMBER_OF_AES_ROUNDS == orig_value:
makeqr.NUMBER_OF_AES_ROUNDS = random.randint(10, 1337)
wrong_rounds_key = makeqr.gen_aes_key(master_pass, aes_key)
self.assertNotEqual(key, wrong_rounds_key)
# Reset and sanity check...
makeqr.NUMBER_OF_AES_ROUNDS = orig_value
key2 = makeqr.gen_aes_key(master_pass, aes_key)
self.assertEqual(key,key2)