我想实现python进行参数的sm2加密解密
时间: 2024-09-24 16:06:23 浏览: 51
在Python中,你可以使用`pycryptodome`库来实现SM2算法的加密和解密。`pycryptodome`是一个强大的加密模块,支持多种密码体制,包括椭圆曲线密码(ECC)。下面是一个基本的例子,展示如何使用`pycryptodome`进行SM2加密和解密:
首先,确保已经安装了`pycryptodome`库。如果没有,可以通过pip安装:
```bash
pip install pycryptodome
```
然后,你可以按照以下步骤实现SM2的加密和解密:
```python
from Crypto.Cipher import PKCS1_OAEP
from Crypto.PublicKey import ECC
from Crypto.Signature import DSS
from Cryptodome.Hash import SHA256
import base64
def generate_sm2_keys():
curve = ECC(curve='P-256')
privkey = curve.generate(curve getRandomContext())
pubkey = privkey.public_key()
return (pubkey.export_key(format='DER'), privkey.export_key(format='DER'))
def sm2_encrypt(msg, pub_key):
ecc_curve = ECC(curve="P-256")
ecc_pub_key = ecc_curve.import_key(pub_key)
cipher_rsa = PKCS1_OAEP.new(ecc_pub_key)
encrypted_msg = cipher_rsa.encrypt(msg.encode('utf-8'))
return base64.b64encode(encrypted_msg)
def sm2_decrypt(encrypted_msg, priv_key):
ecc_curve = ECC(curve="P-256")
ecc_priv_key = ecc_curve.import_key(priv_key)
cipher_rsa = PKCS1_OAEP.new(ecc_priv_key)
decoded_msg = cipher_rsa.decrypt(base64.b64decode(encrypted_msg))
return decoded_msg.decode('utf-8')
# 示例
public_key, private_key = generate_sm2_keys()
message = "Hello, this is a test message."
encrypted_message = sm2_encrypt(message, public_key)
decrypted_message = sm2_decrypt(encrypted_message, private_key)
print(f"Original message: {message}")
print(f"Encrypted message: {encrypted_message}")
print(f"Decrypted message: {decrypted_message}")
```
这个例子中,我们首先生成一对SM2密钥,然后使用公钥加密消息,私钥解密。请注意,实际应用中还需要处理更复杂的情况,比如签名验证和错误处理。
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