def test_speck128_256(self):
block_size = 128
key_size = 256
for x in range(self.test_cnt):
key = randint(0, (2**key_size) - 1)
plaintxt = randint(0, (2**block_size) - 1)
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.decrypt(c.encrypt(plaintxt)) == plaintxt, 'Test %r Failed with Random Key %r and Random Plaintext %r' % (x, hex(key), hex(plaintxt))
def test_pcbc_mode_single(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
pcbc_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
pcbc_equivalent = c.encrypt(self.iv ^ self.plaintxt)
assert pcbc_out == pcbc_equivalent
def test_speck64_128(self):
key = 0x1b1a1918131211100b0a090803020100
plaintxt = 0x3b7265747475432d
ciphertxt = 0x8c6fa548454e028b
block_size = 64
key_size = 128
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_192(self):
key = 0x17161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x726148206665696843206f7420746e65
ciphertxt = 0x1be4cf3a13135566f9bc185de03c1886
block_size = 128
key_size = 192
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck32_64(self):
key = 0x1918111009080100
plaintxt = 0x6574694c
ciphertxt = 0xa86842f2
block_size = 32
key_size = 64
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck48_96(self):
key = 0x1a19181211100a0908020100
plaintxt = 0x6d2073696874
ciphertxt = 0x735e10b6445d
block_size = 48
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_256(self):
key = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x65736f6874206e49202e72656e6f6f70
ciphertxt = 0x4109010405c0f53e4eeeb48d9c188f43
block_size = 128
key_size = 256
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck64_128(self):
key = 0x1b1a1918131211100b0a090803020100
plaintxt = 0x3b7265747475432d
ciphertxt = 0x8c6fa548454e028b
block_size = 64
key_size = 128
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck64_96(self):
key = 0x131211100b0a090803020100
plaintxt = 0x74614620736e6165
ciphertxt = 0x9f7952ec4175946c
block_size = 64
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck96_96(self):
key = 0x0d0c0b0a0908050403020100
plaintxt = 0x65776f68202c656761737520
ciphertxt = 0x9e4d09ab717862bdde8f79aa
block_size = 96
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck96_144(self):
key = 0x1514131211100d0c0b0a0908050403020100
plaintxt = 0x656d6974206e69202c726576
ciphertxt = 0x2bf31072228a7ae440252ee6
block_size = 96
key_size = 144
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_128(self):
key = 0x0f0e0d0c0b0a09080706050403020100
plaintxt = 0x6c617669757165207469206564616d20
ciphertxt = 0xa65d9851797832657860fedf5c570d18
block_size = 128
key_size = 128
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck48_72(self):
key = 0x1211100a0908020100
plaintxt = 0x20796c6c6172
ciphertxt = 0xc049a5385adc
block_size = 48
key_size = 72
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_256(self):
block_size = 128
key_size = 256
for x in range(self.test_cnt):
key = randint(0, (2**key_size) - 1)
plaintxt = randint(0, (2**block_size) - 1)
print(x, hex(key), hex(plaintxt))
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.decrypt(c.encrypt(plaintxt)) == plaintxt
def test_ofb_mode_chain(self):
plaintxts = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ciphertexts = [c.encrypt(x) for x in plaintxts]
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
decryptexts = [c.decrypt(x) for x in ciphertexts]
assert plaintxts == decryptexts
def test_speck96_96(self):
key = 0x0d0c0b0a0908050403020100
plaintxt = 0x65776f68202c656761737520
ciphertxt = 0x9e4d09ab717862bdde8f79aa
block_size = 96
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_256(self):
key = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x65736f6874206e49202e72656e6f6f70
ciphertxt = 0x4109010405c0f53e4eeeb48d9c188f43
block_size = 128
key_size = 256
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_256(self):
block_size = 128
key_size = 256
for x in range(self.test_cnt):
key = randint(0, (2**key_size) - 1)
plaintxt = randint(0, (2**block_size) - 1)
print(x, hex(key), hex(plaintxt))
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.decrypt(c.encrypt(plaintxt)) == plaintxt
def test_speck48_72(self):
key = 0x1211100a0908020100
plaintxt = 0x20796c6c6172
ciphertxt = 0xc049a5385adc
block_size = 48
key_size = 72
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck32_64(self):
key = 0x1918111009080100
plaintxt = 0x6574694c
ciphertxt = 0xa86842f2
block_size = 32
key_size = 64
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck64_96(self):
key = 0x131211100b0a090803020100
plaintxt = 0x74614620736e6165
ciphertxt = 0x9f7952ec4175946c
block_size = 64
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck96_144(self):
key = 0x1514131211100d0c0b0a0908050403020100
plaintxt = 0x656d6974206e69202c726576
ciphertxt = 0x2bf31072228a7ae440252ee6
block_size = 96
key_size = 144
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_128(self):
key = 0x0f0e0d0c0b0a09080706050403020100
plaintxt = 0x6c617669757165207469206564616d20
ciphertxt = 0xa65d9851797832657860fedf5c570d18
block_size = 128
key_size = 128
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_speck128_192(self):
key = 0x17161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x726148206665696843206f7420746e65
ciphertxt = 0x1be4cf3a13135566f9bc185de03c1886
block_size = 128
key_size = 192
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_ctr_mode_equivalent(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ecb_out = c.encrypt(self.iv + self.counter)
ctr_equivalent = ecb_out ^ self.plaintxt
assert ctr_out == ctr_equivalent
def test_speck48_96(self):
key = 0x1a19181211100a0908020100
plaintxt = 0x6d2073696874
ciphertxt = 0x735e10b6445d
block_size = 48
key_size = 96
c = SpeckCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def setUp(self):
key = 0x123456789ABCDEF00FEDCBA987654321
alphabet = string.ascii_letters + string.digits
keysize = 64
idsize = 32
self.codec = IDCodec(key, alphabet, keysize, idsize)
self.cipher = SpeckCipher(key, key_size=keysize, block_size=idsize)
self.base_codec = BaseCodec(alphabet, bits=idsize)
def test_ctr_mode_single_cycle(self):
self.counter = 0x01
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
self.counter = 0x01
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
output_plaintext = c.decrypt(ctr_out)
assert output_plaintext == self.plaintxt
def encrypt(self, pt):
"""encrypt data
Args:
pt (bytes): the plaintext message to encrypt
"""
speck = SpeckCipher(self.key, 256, 128, 'CTR', self.iv)
extra = len(pt) % 16
return b''.join(
speck.encrypt(int.from_bytes(pt[i:i +
16], 'big')).to_bytes(16, 'big')
for i in range(0,
len(pt) - extra, 16)) + speck.encrypt(
int.from_bytes(
pt[len(pt) - extra:], 'big')).to_bytes(
16, 'big')[16 - extra:]
def test_ctr_mode_chain(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = 0
for x in range(1000):
ctr_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ctr_equivalent = 0
for x in range(1000):
ecb_out = c.encrypt(self.iv + self.counter)
self.counter += 1
ctr_equivalent = ecb_out ^ self.plaintxt
assert ctr_out == ctr_equivalent
def decrypt(self, c, extra=0):
"""decrypt data
Args:
c (bytes): the ciphertest to decrypt
extra (int): the length (in bytes) of the final block of plaintext
alternatively, the length of the plaintext in bytes (mod 16)
"""
speck = SpeckCipher(self.key, 256, 128, 'CTR', self.iv)
return b''.join(
speck.decrypt(int.from_bytes(c[i:i +
16], 'big')).to_bytes(16, 'big')
for i in range(0,
len(c) - extra, 16)) + speck.decrypt(
int.from_bytes(
c[len(c) - extra:], 'big')).to_bytes(
16, 'big')[16 - extra:]
def test_cbc_mode_chain(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CBC', init=self.iv)
cbc_out = 0
for x in range(1000):
cbc_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
cbc_equivalent = self.iv
for x in range(1000):
cbc_input = self.plaintxt ^ cbc_equivalent
cbc_equivalent = c.encrypt(cbc_input)
assert cbc_out == cbc_equivalent
class IDCodec(object):
def __init__(self, key, alphabet, key_size, block_size):
self.cipher = SpeckCipher(key,
key_size=key_size,
block_size=block_size)
self.codec = BaseCodec(alphabet, bits=block_size)
self.max_id = 2**block_size
def decode(self, hash: str) -> int:
return self.cipher.decrypt(self.codec.decode(hash)) + 1
def encode(self, id: int) -> str:
if id < 1 or id > self.max_id:
raise Exception('id must be between 1 and %d' % (self.max_id))
return self.codec.encode(self.cipher.encrypt(id - 1))
def test_ofb_mode_equivalent(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_encrypt = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_decrypt = c.decrypt(ofb_encrypt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ecb_out = c.encrypt(self.iv)
ofb_equivalent_encrypt = ecb_out ^ self.plaintxt
ofb_equivalent_decrypt = ecb_out ^ ofb_equivalent_encrypt
assert ofb_encrypt == ofb_equivalent_encrypt
assert ofb_decrypt == ofb_equivalent_decrypt
def test_pcbc_mode_chain(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
pcbc_out = 0
for x in range(1000):
pcbc_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
pcbc_equivalent = 0
for x in range(1000):
pcbc_input = self.plaintxt ^ self.iv
pcbc_equivalent = c.encrypt(pcbc_input)
self.iv = pcbc_equivalent ^ self.plaintxt
assert pcbc_out == pcbc_equivalent
def encrypt(self, plaintext):
out = []
number_str = str(self.encode(str(plaintext)))
chunked_number_str = self.chunks(number_str, 19)
for nstr in chunked_number_str:
encrypted_str = SpeckCipher(self.key).encrypt(int(nstr))
out.append(encrypted_str)
return ".".join([str(x) for x in out])
def __init__(self):
key_bytes = array.array('B', [])
for k in self.gs_encryption_key:
key_bytes.append(k)
self.key_int = int.from_bytes(key_bytes,
byteorder='little',
signed=False)
iv_bytes = array.array('B', [])
for i in self.gs_iv:
iv_bytes.append(i)
self.iv_int = int.from_bytes(iv_bytes,
byteorder='little',
signed=False)
self.gs_speck = SpeckCipher(self.key_int,
key_size=128,
block_size=64,
mode=self.mode,
init=self.iv_int)
def argon2_test():
start = time.time()
ph = PasswordHasher()
hash = ph.hash(password)
hashed = hashlib.sha256(hash).digest()
end = time.time()
print "argon2 : ",(end-start)
start = time.time()
obj =AES.new(hashed,AES.MODE_CBC, 'This is an IV456')
ciphertext = obj.encrypt("The answer is no")
end = time.time()
print "AES Encrypt: ",(end-start)*1000
start = time.time()
obj =AES.new(hashed,AES.MODE_CBC, 'This is an IV456')
plaintext = obj.decrypt(ciphertext)
end = time.time()
print "AES Decrypt: ",(end-start)*1000
my_plaintext = 0xCCCCAAAA55553333
start = time.time()
big_cipher = SimonCipher(0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFF0000, key_size=256, block_size=128)
simon = big_cipher.encrypt(my_plaintext)
end = time.time()
print "Simon Encrypt: ",(end-start)*1000
start = time.time()
big_cipher1 = SpeckCipher(0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFF0000, key_size=256, block_size=128)
speck = big_cipher1.encrypt(my_plaintext)
end = time.time()
print "Speck Encrypt: ",(end-start)*1000
start = time.time()
big_cipher = SimonCipher(0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFF0000, key_size=256, block_size=128)
plain = big_cipher.decrypt(simon)
end = time.time()
print plain
print "Simon Decrypt: ",(end-start)*1000
start = time.time()
big_cipher1 = SpeckCipher(0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFF0000, key_size=256, block_size=128)
plain = big_cipher1.decrypt(speck)
end = time.time()
print plain
print "Speck Decrypt: ",(end-start)*1000
def MtE(ptxt, key1, key2):
ctxt = 0
T = hmac.new(
key1.encode(), msg=ptxt.encode(),
digestmod=SHA256).digest() #was digest before see if this works
E = SpeckCipher(key2) #encryption block with hmack output as key
Prev = random.getrandbits(128) #create random IV for first value
thing = ptxt.encode() + T
thing = str(thing)
block = breakup(thing, 16)
for i in range(len(block)):
temp2 = 0
for j in block[i]: #make string into int
temp2 = (temp2 << 8) | ord(j)
block[i] = temp2 ^ Prev
temp = E.encrypt(block[i])
#print(temp2)
#print(temp)
ctxt = (ctxt << 128) | (temp ^ temp2) # accumulate onto the ctxt
print("CTXT: ")
print(hex(ctxt))
def test_pcbc_mode_single(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
pcbc_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
pcbc_equivalent = c.encrypt(self.iv ^ self.plaintxt)
assert pcbc_out == pcbc_equivalent
class GsCipher:
gs_encryption_key = None
gs_iv = None
gs_speck = None
mode = None
logger = None
key_int = None
iv_int = None
def __init__(self):
key_bytes = array.array('B', [])
for k in self.gs_encryption_key:
key_bytes.append(k)
self.key_int = int.from_bytes(key_bytes,
byteorder='little',
signed=False)
iv_bytes = array.array('B', [])
for i in self.gs_iv:
iv_bytes.append(i)
self.iv_int = int.from_bytes(iv_bytes,
byteorder='little',
signed=False)
self.gs_speck = SpeckCipher(self.key_int,
key_size=128,
block_size=64,
mode=self.mode,
init=self.iv_int)
def encrypt(self, ax25_packet):
if self.gs_speck.mode == 'CBC':
self.gs_speck.update_iv(self.iv_int)
ax25_packet_encrypted = array.array('B', ax25_packet[:16])
ax25_packet_temp = array.array('B', ax25_packet[16:])
for i in range(0, 232, 8):
plaintext_int = int.from_bytes(ax25_packet_temp[i:(i + 8)],
byteorder='big',
signed=False)
ciphertext = self.gs_speck.encrypt(plaintext_int)
ciphertext_bytes = bytearray.fromhex('{:032x}'.format(ciphertext))
for c in ciphertext_bytes[8:]:
ax25_packet_encrypted.append(c)
ax25_packet_encrypted.extend([0x00] * 5)
return ax25_packet_encrypted
def decrypt(self, ax25_packet_encrypted):
if self.gs_speck.mode == 'CBC':
self.gs_speck.update_iv(self.iv_int)
ax25_packet = array.array('B', ax25_packet_encrypted[:16])
ax25_packet_temp = ax25_packet_encrypted[16:]
for i in range(0, 232, 8):
ciphertext_int = int.from_bytes(ax25_packet_temp[i:(i + 8)],
byteorder='big',
signed=False)
plaintext = self.gs_speck.decrypt(ciphertext_int)
plaintext_bytes = bytearray.fromhex('{:032x}'.format(plaintext))
for p in plaintext_bytes[8:]:
ax25_packet.append(p)
return ax25_packet
def decrypt_matrix(K0, K1, X):
# Step 1: Create the cipher object
# Discovered it's speck-ecb-128-128 through reversing
speck_cipher = SpeckCipher(K0, K1)
# TODO(eugenek): These steps are less complicated than they look, my SpeckCipher class just blows,
# and expects data to come as QWORDS
# Step 2: Format the matrix into cipher text
# Flatten the matrix to the cipher blocks, size 128
# First get 64-bit QWORDs, 2 cipher blocks are formed out of them
ct_64 = [0, 0, 0, 0]
for i in xrange(4):
ct_64[i] = (X[i][0] << 48) | (X[i][1] << 32) | (X[i][2] << 16) | (
X[i][3] << 0)
ct0 = (ct_64[0] << 64) | (ct_64[1])
ct1 = (ct_64[2] << 64) | (ct_64[3])
# Step 3: Decrypt the cipher text
pt0_0, pt0_1 = speck_cipher.decrypt(ct_64[0], ct_64[1])
pt1_0, pt1_1 = speck_cipher.decrypt(ct_64[2], ct_64[3])
pt0 = (pt0_0 << 64) | (pt0_1)
pt1 = (pt1_0 << 64) | (pt1_1)
# Step 4: Parse the data into a list of shorts
ptshorts = []
pt0_str = "%0X" % pt0
for i in xrange(0, len(pt0_str), 4):
short = pt0_str[i] + pt0_str[i + 1] + pt0_str[i + 2] + pt0_str[i + 3]
ptshorts.append(int(short, 16))
pt1_str = "%0X" % pt1
for i in xrange(0, len(pt1_str), 4):
short = pt1_str[i] + pt1_str[i + 1] + pt1_str[i + 2] + pt1_str[i + 3]
ptshorts.append(int(short, 16))
return ptshorts
def test_ofb_mode_chain(self):
plaintxts = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ciphertexts = [c.encrypt(x) for x in plaintxts]
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
decryptexts = [c.decrypt(x) for x in ciphertexts]
assert plaintxts == decryptexts
def test_ctr_mode_equivalent(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ecb_out = c.encrypt(self.iv + self.counter)
ctr_equivalent = ecb_out ^ self.plaintxt
assert ctr_out == ctr_equivalent
class TestIDCodec(unittest.TestCase):
def setUp(self):
key = 0x123456789ABCDEF00FEDCBA987654321
alphabet = string.ascii_letters + string.digits
keysize = 64
idsize = 32
self.codec = IDCodec(key, alphabet, keysize, idsize)
self.cipher = SpeckCipher(key, key_size=keysize, block_size=idsize)
self.base_codec = BaseCodec(alphabet, bits=idsize)
def test_exception(self):
with self.assertRaises(Exception) as e:
self.codec.encode(0)
with self.assertRaises(Exception) as e:
self.codec.encode(-1)
with self.assertRaises(Exception) as e:
self.codec.encode(2**32 + 2)
with self.assertRaises(Exception) as e:
self.codec.encode(2**64)
def test_codec(self):
vals = [0, 2**32 - 1]
for val in vals:
encoded_1 = self.codec.encode(val + 1)
encoded_2 = self.base_codec.encode(self.cipher.encrypt(val))
self.assertEqual(encoded_1, encoded_2)
decoded_1 = self.codec.decode(encoded_1)
decoded_2 = self.cipher.decrypt(
self.base_codec.decode(encoded_2)) + 1
self.assertEqual(decoded_1, decoded_2)
def test_ctr_mode_single_cycle(self):
self.counter = 0x01
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
self.counter = 0x01
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
output_plaintext = c.decrypt(ctr_out)
assert output_plaintext == self.plaintxt
def test_ofb_mode_equivalent(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_encrypt = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_decrypt = c.decrypt(ofb_encrypt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ecb_out = c.encrypt(self.iv)
ofb_equivalent_encrypt = ecb_out ^ self.plaintxt
ofb_equivalent_decrypt = ecb_out ^ ofb_equivalent_encrypt
assert ofb_encrypt == ofb_equivalent_encrypt
assert ofb_decrypt == ofb_equivalent_decrypt
def client_server_test():
block_size = 128
key_token = 123456 # shared via VLC
speck_server = SpeckCipher(key_token, block_size=block_size)
counter = 0
cipher_server = speck_server.encrypt(counter)
print cipher_server
speck_client = SpeckCipher(key_token, block_size=block_size)
plain_client = speck_client.decrypt(cipher_server)
print plain_client
plain_client += 1
cipher_client = speck_client.encrypt(plain_client)
print cipher_client
plain_server = speck_server.decrypt(cipher_client)
print plain_server
assert plain_server > counter
def test_cbc_mode_chain(self):
c1 = SpeckCipher(self.key,
self.key_size,
self.block_size,
'CBC',
init=self.iv)
c2 = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
cbc_iv_equivalent = self.iv
for x in range(1000):
cbc_input = self.plaintxt ^ cbc_iv_equivalent
cbc_iv_equivalent = c2.encrypt(cbc_input)
cbc_out = c1.encrypt(self.plaintxt)
assert cbc_out == cbc_iv_equivalent
def test_ctr_mode_chain(self):
c = SpeckCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = 0
for x in range(1000):
ctr_out = c.encrypt(self.plaintxt)
c = SpeckCipher(self.key, self.key_size, self.block_size, 'ECB')
ctr_equivalent = 0
for x in range(1000):
ecb_out = c.encrypt(self.iv + self.counter)
self.counter += 1
ctr_equivalent = ecb_out ^ self.plaintxt
assert ctr_out == ctr_equivalent