pip install gmssl

import base64
import binascii
from gmssl import sm2, func
#16进制的公钥和私钥
private_key = '00B9AB0B828FF68872F21A837FC303668428DEA11DCD1B24429D0C99E24EED83D5'
public_key = 'B9C9A6E04E9C91F7BA880429273747D7EF5DDEB0BB2FF6317EB00BEF331A83081A6994B8993F3F5D6EADDDB81872266C87C018FB4162F5AF347B483E24620207'
sm2_crypt = sm2.CryptSM2(
  public_key=public_key, private_key=private_key)

#数据和加密后数据为bytes类型
data = b"111"
enc_data = sm2_crypt.encrypt(data)
dec_data =sm2_crypt.decrypt(enc_data)
assert dec_data == data

data = b"111" # bytes类型
random_hex_str = func.random_hex(sm2_crypt.para_len)
sign = sm2_crypt.sign(data, random_hex_str) # 16进制
assert sm2_crypt.verify(sign, data) # 16进制

from gmssl.sm4 import CryptSM4, SM4_ENCRYPT, SM4_DECRYPT

key = b'3l5butlj26hvv313'
value = b'111' # bytes类型
iv = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' # bytes类型
crypt_sm4 = CryptSM4()

crypt_sm4.set_key(key, SM4_ENCRYPT)
encrypt_value = crypt_sm4.crypt_ecb(value) # bytes类型
crypt_sm4.set_key(key, SM4_DECRYPT)
decrypt_value = crypt_sm4.crypt_ecb(encrypt_value) # bytes类型
assert value == decrypt_value

crypt_sm4.set_key(key, SM4_ENCRYPT)
encrypt_value = crypt_sm4.crypt_cbc(iv , value) # bytes类型
crypt_sm4.set_key(key, SM4_DECRYPT)
decrypt_value = crypt_sm4.crypt_cbc(iv , encrypt_value) # bytes类型
assert value == decrypt_value