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| Sbox = [
0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
]
FK = [
0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
]
CK = [
0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
]
def rol(x, n):
return ((x << n) | (x >> (32 - n))) & 0xFFFFFFFF
def sm4_box(idx):
return Sbox[idx]
def sm4_l(t):
return t ^ rol(t, 2) ^ rol(t, 10) ^ rol(t, 18) ^ rol(t, 24)
def sm4_t(x):
return sm4_l(x) ^ rol(sm4_l(rol(x, 13) ^ rol(x, 23)), 8)
def sm4_key_schedule(key):
rk = [0] * 32
k = [0] * 36
for i in range(4):
k[i] = key[i * 4] << 24 | key[i * 4 + 1] << 16 | key[i * 4 + 2] << 8 | key[i * 4 + 3]
for i in range(32):
k[i + 4] = k[i] ^ sm4_t(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^ CK[i])
rk[i] = k[i + 4]
return rk
def sm4_round(x, rk):
return x ^ sm4_t(x ^ rol(x ^ rol(x ^ rol(x ^ rk, 2), 10), 18) ^ rol(x, 24))
def sm4_encrypt(plain, key):
rk = sm4_key_schedule(key)
x = plain[0] << 24 | plain[1] << 16 | plain[2] << 8 | plain[3]
for i in range(32):
x = sm4_round(x, rk[i])
result = [
(x >> 24) & 0xFF,
(x >> 16) & 0xFF,
(x >> 8) & 0xFF,
x & 0xFF
]
return result
def main():
plaintext = [0x01, 0x23, 0x45, 0x67]
key = [0x01, 0x23, 0x45, 0x67] * 4
ciphertext = sm4_encrypt(plaintext, key)
print("Ciphertext:", ciphertext)
if __name__ == "__main__":
main()
|
