def test_pcbc_mode_single(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
pcbc_out = c.encrypt(self.plaintxt)
c = SimonCipher(self.key, self.key_size, self.block_size, 'ECB')
pcbc_equivalent = c.encrypt(self.iv ^ self.plaintxt)
assert pcbc_out == pcbc_equivalent
def test_pcbc_mode_single(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
pcbc_out = c.encrypt(self.plaintxt)
c = SimonCipher(self.key, self.key_size, self.block_size, 'ECB')
pcbc_equivalent = c.encrypt(self.iv ^ self.plaintxt)
assert pcbc_out == pcbc_equivalent
def test_ctr_mode_equivalent(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
c = SimonCipher(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_ctr_mode_equivalent(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'CTR', init=self.iv, counter=self.counter)
ctr_out = c.encrypt(self.plaintxt)
c = SimonCipher(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_ofb_mode_equivalent(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_encrypt = c.encrypt(self.plaintxt)
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_decrypt = c.decrypt(ofb_encrypt)
c = SimonCipher(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_ofb_mode_equivalent(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_encrypt = c.encrypt(self.plaintxt)
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ofb_decrypt = c.decrypt(ofb_encrypt)
c = SimonCipher(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_speck64_96(keyi):
key = binascii.hexlify(keyi)
print key
key = int("0x" + key, 16)
plaintxt = 0x6d564d37426e6e71
ciphertxt = 0xbb5d12ba422834b5
block_size = 64
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
print hex(c.encrypt(plaintxt))
if c.encrypt(plaintxt) == ciphertxt:
print keyi
if c.decrypt(ciphertxt) == plaintxt:
print keyi
def test_cbc_mode_chain(self):
c1 = SimonCipher(self.key,
self.key_size,
self.block_size,
'CBC',
init=self.iv)
c2 = SimonCipher(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_cbc_mode_chain(self):
c = SimonCipher(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 = SimonCipher(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
def test_ctr_mode_chain(self):
c = SimonCipher(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 = SimonCipher(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 test_ctr_mode_chain(self):
c = SimonCipher(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 = SimonCipher(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 test_pcbc_mode_chain(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
cbc_out = 0
for x in range(1000):
cbc_out = c.encrypt(self.plaintxt)
c = SimonCipher(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 cbc_out == pcbc_equivalent
def test_pcbc_mode_chain(self):
c = SimonCipher(self.key, self.key_size, self.block_size, 'PCBC', init=self.iv)
cbc_out = 0
for x in range(1000):
cbc_out = c.encrypt(self.plaintxt)
c = SimonCipher(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 cbc_out == pcbc_equivalent
def test_simon128_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 = SimonCipher(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_simon128_192(self):
key = 0x17161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x206572656874206e6568772065626972
ciphertxt = 0xc4ac61effcdc0d4f6c9c8d6e2597b85b
block_size = 128
key_size = 192
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon128_128(self):
key = 0x0f0e0d0c0b0a09080706050403020100
plaintxt = 0x63736564207372656c6c657661727420
ciphertxt = 0x49681b1e1e54fe3f65aa832af84e0bbc
block_size = 128
key_size = 128
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon96_144(self):
key = 0x1514131211100d0c0b0a0908050403020100
plaintxt = 0x74616874207473756420666f
ciphertxt = 0xecad1c6c451e3f59c5db1ae9
block_size = 96
key_size = 144
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon96_96(self):
key = 0x0d0c0b0a0908050403020100
plaintxt = 0x2072616c6c69702065687420
ciphertxt = 0x602807a462b469063d8ff082
block_size = 96
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon64_128(self):
key = 0x1b1a1918131211100b0a090803020100
plaintxt = 0x656b696c20646e75
ciphertxt = 0x44c8fc20b9dfa07a
block_size = 64
key_size = 128
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon64_96(self):
key = 0x131211100b0a090803020100
plaintxt = 0x6f7220676e696c63
ciphertxt = 0x5ca2e27f111a8fc8
block_size = 64
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon48_96(self):
key = 0x1a19181211100a0908020100
plaintxt = 0x72696320646e
ciphertxt = 0x6e06a5acf156
block_size = 48
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon48_72(self):
key = 0x1211100a0908020100
plaintxt = 0x6120676e696c
ciphertxt = 0xdae5ac292cac
block_size = 48
key_size = 72
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon32_64(self):
key = 0x1918111009080100
plaintxt = 0x65656877
ciphertxt = 0xc69be9bb
block_size = 32
key_size = 64
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_ofb_mode_chain(self):
plaintxts = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ciphertexts = [c.encrypt(x) for x in plaintxts]
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
decryptexts = [c.decrypt(x) for x in ciphertexts]
assert plaintxts == decryptexts
def verify_key(key, plaintext_to_ones):
w = SimonCipher(int(key,2))
wrong = 0
for plaintext in plaintext_to_ones:
_, current_ones = w.encrypt(plaintext)
offset = abs(current_ones - plaintext_to_ones[plaintext])
if offset != 0:
wrong += 1
return wrong
def test_simon128_256(self):
key = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x74206e69206d6f6f6d69732061207369
ciphertxt = 0x8d2b5579afc8a3a03bf72a87efe7b868
block_size = 128
key_size = 256
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon48_96(self):
key = 0x1a19181211100a0908020100
plaintxt = 0x72696320646e
ciphertxt = 0x6e06a5acf156
block_size = 48
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon64_128(self):
key = 0x1b1a1918131211100b0a090803020100
plaintxt = 0x656b696c20646e75
ciphertxt = 0x44c8fc20b9dfa07a
block_size = 64
key_size = 128
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon48_72(self):
key = 0x1211100a0908020100
plaintxt = 0x6120676e696c
ciphertxt = 0xdae5ac292cac
block_size = 48
key_size = 72
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon96_144(self):
key = 0x1514131211100d0c0b0a0908050403020100
plaintxt = 0x74616874207473756420666f
ciphertxt = 0xecad1c6c451e3f59c5db1ae9
block_size = 96
key_size = 144
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon96_96(self):
key = 0x0d0c0b0a0908050403020100
plaintxt = 0x2072616c6c69702065687420
ciphertxt = 0x602807a462b469063d8ff082
block_size = 96
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon128_192(self):
key = 0x17161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x206572656874206e6568772065626972
ciphertxt = 0xc4ac61effcdc0d4f6c9c8d6e2597b85b
block_size = 128
key_size = 192
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon128_128(self):
key = 0x0f0e0d0c0b0a09080706050403020100
plaintxt = 0x63736564207372656c6c657661727420
ciphertxt = 0x49681b1e1e54fe3f65aa832af84e0bbc
block_size = 128
key_size = 128
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_ofb_mode_chain(self):
plaintxts = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
c = SimonCipher(self.key, self.key_size, self.block_size, 'OFB', init=self.iv)
ciphertexts = [c.encrypt(x) for x in plaintxts]
c = SimonCipher(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_simon128_256(self):
key = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
plaintxt = 0x74206e69206d6f6f6d69732061207369
ciphertxt = 0x8d2b5579afc8a3a03bf72a87efe7b868
block_size = 128
key_size = 256
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon64_96(self):
key = 0x131211100b0a090803020100
plaintxt = 0x6f7220676e696c63
ciphertxt = 0x5ca2e27f111a8fc8
block_size = 64
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon32_64(self):
key = 0x1918111009080100
plaintxt = 0x65656877
ciphertxt = 0xc69be9bb
block_size = 32
key_size = 64
c = SimonCipher(key, key_size, block_size, 'ECB')
assert c.encrypt(plaintxt) == ciphertxt
assert c.decrypt(ciphertxt) == plaintxt
def test_simon64_96(key):
#key = 0x131211100b0a090803020100
plaintxt = 0x6d564d37426e6e71
ciphertxt = 0xbb5d12ba422834b5
block_size = 64
key_size = 96
c = SimonCipher(key, key_size, block_size, 'ECB')
if c.encrypt(plaintxt) == ciphertxt:
return hex(key)
return 0
def simon128_256_Cipher(k, p):
#simon128/256-CTR
ctr_cipher = SimonCipher(k,
mode='CTR',
init=0xCABCABCAB,
counter=1,
key_size=256,
block_size=128)
simon_ciphertext = ctr_cipher.encrypt(p)
return simon_ciphertext
def test_ctr_mode_single_cycle(self):
self.counter = 0x01
c = SimonCipher(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 = SimonCipher(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_ctr_mode_single_cycle(self):
self.counter = 0x01
c = SimonCipher(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 = SimonCipher(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_cbc_mode_single(self):
c = SimonCipher(self.key,
self.key_size,
self.block_size,
'CBC',
init=self.iv)
cbc_out = c.encrypt(self.plaintxt)
c = SimonCipher(self.key, self.key_size, self.block_size, 'ECB')
cbc_equivalent = c.encrypt(self.iv ^ self.plaintxt)
assert cbc_out == cbc_equivalent
c = SimonCipher(self.key,
self.key_size,
self.block_size,
'CBC',
init=self.iv)
cbc_out = c.decrypt(cbc_out)
c = SimonCipher(self.key, self.key_size, self.block_size, 'ECB')
cbc_equivalent = c.decrypt(cbc_equivalent) ^ self.iv
assert hex(cbc_out) == hex(cbc_equivalent) == hex(self.plaintxt)
def SimCTR(ptxt, key1, nonce):
counter = 0
temp2 = 0
NonceCount = nonce ^ counter
ctxt = []
E = SimonCipher(key1, key_size=128, block_size=64)
block = breakup(ptxt, 8) #since block size = 64 only 8 chars
for i in range(len(block)):
NonceCount = nonce ^ counter
counter = counter + 1
temp = E.encrypt(NonceCount)
for a in block[
i]: #shift temp2 by 1 byte each time and or it with a new byte
temp2 = (temp2 << 8) | ord(a)
ctxt.append((temp ^ temp2)) # accumulate onto the ctxt
temp2 = 0
return (ctxt)
class Simon:
def __init__(self, key_size, blocklength):
if key_size != 96:
raise InvalidKeyLength("Keylength of Simon must be 96 bits!")
if blocklength % 64 != 0:
raise InvalidCipherBlockLength("Blocklength of Simon should be multiplier of 64")
self._key = None
self._key_size = key_size
self._blocklength = blocklength
def set_key(self, key):
hex_key = bits_to_hex(key)
self._key = SimonCipher(hex_key, key_size=96, block_size=64)
def encrypt(self, message):
split_message = [message[x:x+64] for x in range(0, len(message), 64)]
encrypted_message = []
for single_message in split_message:
hex_message = bits_to_hex(single_message)
encrypted_hex = self._key.encrypt(hex_message)
encrypted_message = encrypted_message + hex_to_bits(encrypted_hex, 64)
return encrypted_message
def decrypt(self, message):
split_message = [message[x:x + 64] for x in range(0, len(message), 64)]
decrypted_message = []
for single_message in split_message:
hex_message = bits_to_hex(single_message)
decrypted_hex = self._key.decrypt(hex_message)
decrypted_message = decrypted_message + hex_to_bits(decrypted_hex, 64)
return decrypted_message
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 EtM(ptxt, key1, key2, nonce):
counter = 0
temp2 = 0
NonceCount = nonce ^ counter
ctxt = 0
E = SimonCipher(key1, key_size=256, block_size=128)
mac = CMAC.new(key=key2.encode(), ciphermod=AES) #Mac block
block = breakup(ptxt, 16)
for i in range(len(block)):
NonceCount = nonce ^ counter
counter = counter + 1
temp = E.encrypt(NonceCount)
for a in block[
i]: #shift temp2 by 1 byte each time and or it with a new byte
temp2 = (temp2 << 8) | ord(a)
ctxt = (ctxt << 128) | (temp ^ temp2) # accumulate onto the ctxt
temp2 = 0
T = mac.update(str(ctxt).encode()).hexdigest()
print("CTXT: ")
print(hex(ctxt))
print("T: ")
print(T)
def EaM(ptxt, key1, key2, nonce):
counter = 0
temp2 = 0
NonceCount = nonce ^ counter
ctxt = 0
E = SimonCipher(key1) #encryption block default 128 bit
mac = Poly1305.new(key=key2.encode(), cipher=AES) #Mac block
block = breakup(ptxt, 16)
T = mac.update(ptxt.encode()).hexdigest()
for i in range(len(block)):
NonceCount = nonce ^ counter
counter = counter + 1
temp = E.encrypt(NonceCount)
for a in block[
i]: #shift temp2 by 1 byte each time and or it with a new byte
temp2 = (temp2 << 8) | ord(a)
#print(temp2)
#print(temp)
ctxt = (ctxt << 128) | (temp ^ temp2) # accumulate onto the ctxt
print("CTXT: ")
print(hex(ctxt))
print("T: ")
print(T)
import random
import binascii
from simon import SimonCipher
key_plain = os.environ['flag'].encode("utf-8")
key_encoded = int.from_bytes(key_plain, "big")
my_simon = SimonCipher(key_encoded)
my_plaintext = ''.join(
random.SystemRandom().choice(string.ascii_lowercase +
string.ascii_uppercase + string.digits)
for _ in range((8))).encode("utf-8")
my_plaintext_encoded = int.from_bytes(my_plaintext, "big")
simon_ciphertext = my_simon.encrypt(my_plaintext_encoded)
simon_plaintext = my_simon.decrypt(simon_ciphertext)
print(key_plain)
print(my_plaintext_encoded)
print(simon_plaintext)
print(my_plaintext)
print(simon_plaintext.to_bytes(8, "big").decode("utf-8"))
with open("/usr/src/app/data/plain", "wb") as fd:
fd.write(my_plaintext)
with open("/usr/src/app/data/cipher", "wb") as fd:
fd.write(simon_ciphertext.to_bytes(16, "big"))
import codecs
from simon import SimonCipher
from speck import SpeckCipher
plain = 0x6d564d37426e6e71
cipher = 0xbb5d12ba422834b5
flag = False
for i in range(48, 126):
for j in range(48, 126):
for k in range(48, 126):
for l in range(48, 126):
key = "SECCON{" + chr(i) + chr(j) + chr(k) + chr(l) + "}"
key = key.encode().hex()
key = int(key, 16)
my_simon = SimonCipher(key, key_size=96, block_size=64)
simon_ciphertext = my_simon.encrypt(plain)
if (simon_ciphertext == cipher):
flag = True
break
if (flag):
break
if (flag):
break
if (flag):
break
print("Flag: {0}".format("SECCON{" + chr(i) + chr(j) + chr(k) + chr(l) + "}"))