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hierocrypt_l1.py
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import random
import libcrypt as lc
# Таблица замены при шифровании
SBOX = (0x07, 0xFC, 0x55, 0x70, 0x98, 0x8E, 0x84, 0x4E, 0xBC, 0x75, 0xCE, 0x18, 0x02, 0xE9, 0x5D, 0x80,
0x1C, 0x60, 0x78, 0x42, 0x9D, 0x2E, 0xF5, 0xE8, 0xC6, 0x7A, 0x2F, 0xA4, 0xB2, 0x5F, 0x19, 0x87,
0x0B, 0x9B, 0x9C, 0xD3, 0xC3, 0x77, 0x3D, 0x6F, 0xB9, 0x2D, 0x4D, 0xF7, 0x8C, 0xA7, 0xAC, 0x17,
0x3C, 0x5A, 0x41, 0xC9, 0x29, 0xED, 0xDE, 0x27, 0x69, 0x30, 0x72, 0xA8, 0x95, 0x3E, 0xF9, 0xD8,
0x21, 0x8B, 0x44, 0xD7, 0x11, 0x0D, 0x48, 0xFD, 0x6A, 0x01, 0x57, 0xE5, 0xBD, 0x85, 0xEC, 0x1E,
0x37, 0x9F, 0xB5, 0x9A, 0x7C, 0x09, 0xF1, 0xB1, 0x94, 0x81, 0x82, 0x08, 0xFB, 0xC0, 0x51, 0x0F,
0x61, 0x7F, 0x1A, 0x56, 0x96, 0x13, 0xC1, 0x67, 0x99, 0x03, 0x5E, 0xB6, 0xCA, 0xFA, 0x9E, 0xDF,
0xD6, 0x83, 0xCC, 0xA2, 0x12, 0x23, 0xB7, 0x65, 0xD0, 0x39, 0x7D, 0x3B, 0xD5, 0xB0, 0xAF, 0x1F,
0x06, 0xC8, 0x34, 0xC5, 0x1B, 0x79, 0x4B, 0x66, 0xBF, 0x88, 0x4A, 0xC4, 0xEF, 0x58, 0x3F, 0x0A,
0x2C, 0x73, 0xD1, 0xF8, 0x6B, 0xE6, 0x20, 0xB8, 0x22, 0x43, 0xB3, 0x33, 0xE7, 0xF0, 0x71, 0x7E,
0x52, 0x89, 0x47, 0x63, 0x0E, 0x6D, 0xE3, 0xBE, 0x59, 0x64, 0xEE, 0xF6, 0x38, 0x5C, 0xF4, 0x5B,
0x49, 0xD4, 0xE0, 0xF3, 0xBB, 0x54, 0x26, 0x2B, 0x00, 0x86, 0x90, 0xFF, 0xFE, 0xA6, 0x7B, 0x05,
0xAD, 0x68, 0xA1, 0x10, 0xEB, 0xC7, 0xE2, 0xF2, 0x46, 0x8A, 0x6C, 0x14, 0x6E, 0xCF, 0x35, 0x45,
0x50, 0xD2, 0x92, 0x74, 0x93, 0xE1, 0xDA, 0xAE, 0xA9, 0x53, 0xE4, 0x40, 0xCD, 0xBA, 0x97, 0xA3,
0x91, 0x31, 0x25, 0x76, 0x36, 0x32, 0x28, 0x3A, 0x24, 0x4C, 0xDB, 0xD9, 0x8D, 0xDC, 0x62, 0x2A,
0xEA, 0x15, 0xDD, 0xC2, 0xA5, 0x0C, 0x04, 0x1D, 0x8F, 0xCB, 0xB4, 0x4F, 0x16, 0xAB, 0xAA, 0xA0)
# Константные матрицы, используемые при шифровании
MDS = ((0xC4, 0x65, 0xC8, 0x8B),
(0x8B, 0xC4, 0x65, 0xC8),
(0xC8, 0x8B, 0xC4, 0x65),
(0x65, 0xC8, 0x8B, 0xC4))
MDSH = ((1, 0, 1, 0, 1, 1, 1, 0),
(1, 1, 0, 1, 1, 1, 1, 1),
(1, 1, 1, 0, 0, 1, 1, 1),
(0, 1, 0, 1, 1, 1, 0, 1),
(1, 1, 0, 1, 0, 1, 0, 1),
(1, 1, 1, 0, 1, 0, 1, 0),
(1, 1, 1, 1, 1, 1, 0, 1),
(1, 0, 1, 0, 1, 0, 1, 1))
# Константные матрицы, используемые при расширении ключа
HCONSTS = (0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6, 0xF7DEF58A)
M5 = ((1, 0, 1, 0), (1, 1, 0, 1),
(1, 1, 1, 0), (0, 1, 0, 1))
MB = ((0, 1, 0, 1), (1, 0, 1, 0),
(1, 1, 0, 1), (1, 0, 1, 1))
M8 = ((1, 0, 1, 0), (0, 1, 0, 1),
(0, 1, 1, 1), (1, 0, 1, 1))
KEY_SIZE = 128
BLOCK_SIZE = 64
def break_key_into_blocks(key, block_size, key_size):
def get_right_block(n):
return n % 2 ** block_size
def rshift(n):
return n >> block_size
nbytes = key_size // block_size
blocks = []
for n in range(nbytes):
blocks.append(get_right_block(key))
key = rshift(key)
blocks.reverse()
return blocks
def break_data_into_blocks(data):
items_per_block = BLOCK_SIZE // 8
data_len = len(data)
if data_len % items_per_block != 0:
nrequired = items_per_block - data_len % items_per_block
for n in range(nrequired):
data.append(0)
data_len += nrequired
blocks = []
for n in range(0, data_len, 8):
blocks.append(data[n:n + 8])
return blocks
def glue_bytes(byte_arr):
res = 0
byte_arr.reverse()
for i in range(len(byte_arr)):
res += byte_arr[i] * 2**(8 * i)
return res
def matrix_mul(data, mul_matrix):
out = []
n = len(mul_matrix)
for i in range(n):
m = 0
for j in range(n):
m ^= lc.poly_mod(lc.poly_mul(mul_matrix[i][j], data[j]), lc.PRIMITIVE_GF8)
out.append(m)
return out
def key_expansion(key):
def P5(x):
blocks = break_key_into_blocks(x, 8, 32)
blocks = matrix_mul(blocks, M5)
return glue_bytes(blocks)
def PB(x):
blocks = break_key_into_blocks(x, 8, 32)
blocks = matrix_mul(blocks, M8)
return glue_bytes(blocks)
def F(x):
blocks = break_key_into_blocks(x, 8, 32)
blocks = [SBOX[blocks[i]] for i in range(len(blocks))]
blocks = matrix_mul(blocks, M8)
return glue_bytes(blocks)
def P16(x):
t1 = matrix_mul(x, MB)
t2 = matrix_mul(x, M5)
return glue_bytes(t1), glue_bytes(t2)
# Генерация промежуточного ключа
key_blocks = break_key_into_blocks(key, 32, KEY_SIZE)
z3 = P5(key_blocks[2]) ^ HCONSTS[0]
z4 = PB(key_blocks[3])
z1 = key_blocks[1]
z2 = key_blocks[0] ^ F(key_blocks[1] ^ z3)
# Вычисление расширенных ключей
out_keys = [0 for i in range(7)]
x1, x2, x3, x4 = z1, z2, z3, z4
for i in range(4):
y3 = P5(x3) ^ HCONSTS[i + 1]
y4 = PB(x4)
y1 = x2
y2 = x1 ^ F(x2 ^ z3)
k11 = y2
k12 = y2 ^ x1 ^ y3
k21 = y2 ^ x1 ^ y4
k22 = y1 ^ y4
out_keys[i] = glue_bytes([k11, k21, k21, k22])
x1, x2, x3, x4 = y1, y2, y3, y4
for i in range(4, 7):
out_keys[i] = out_keys[6 - i]
return out_keys
def encrypt(data, key):
def XS(block, round_key):
nitems = len(block)
key_bytes = break_key_into_blocks(round_key, 8, KEY_SIZE)
l_key_bytes = key_bytes[:8]
r_key_bytes = key_bytes[8:]
for i in range(nitems):
block[i] ^= l_key_bytes[i]
for i in range(nitems):
block[i] = SBOX[int(block[i])]
lblock = matrix_mul(block[:4], MDS)
rblock = matrix_mul(block[4:], MDS)
block = lblock + rblock
for i in range(nitems):
block[i] ^= r_key_bytes[i]
for i in range(nitems):
block[i] = SBOX[int(block[i])]
return block
def PH(block):
return matrix_mul(block, MDSH)
def final_key(block, key):
nitems = len(block)
key_bytes = break_key_into_blocks(key, 8, KEY_SIZE)[:8]
for i in range(nitems):
block[i] ^= key_bytes[i]
return block
round_keys = key_expansion(key)
blocks = break_data_into_blocks(data)
for i in range(len(blocks)):
for r in range(5):
blocks[i] = XS(blocks[i], round_keys[r])
blocks[i] = PH(blocks[i])
blocks[i] = XS(blocks[i], round_keys[-2])
blocks[i] = final_key(blocks[i], round_keys[-1])
out = []
for i in range(len(blocks)):
out += blocks[i]
return out