商密2（SM2）获取公私钥对、加解密文件

exe文件下载
链接: https://pan.baidu.com/s/1OAPvcv26NoVpmmXM7kq_xQ?pwd=c46d 提取码: c46d

以下为源代码：

获取SM2公私钥对

import os
import time
from gmssl import sm2

def generate_key_pair():
    # 生成32字节(256位)的私钥
    pri_key = os.urandom(32).hex()
    # 使用gmssl生成公钥
    sm2_crypt = sm2.CryptSM2(private_key=pri_key, public_key='')
    pub_key = sm2_crypt._kg(int(pri_key, 16), sm2.default_ecc_table['g'])
    return pri_key, pub_key

if __name__ == '__main__':
    pri_key, pub_key =generate_key_pair()
    with open('key_pair_' + str(time.time()) + '.txt', 'w') as f:
        f.write('公钥：' + pub_key + '\n私钥：' + pri_key)

SM2加密文件

from gmssl import sm2

def encrypt_file(file_path, pub_key):
    # 读取文件内容
    with open(file_path, 'rb') as f:
        data = f.read()

    # 初始化SM2加密对象
    sm2_crypt = sm2.CryptSM2(public_key=pub_key, private_key='', mode=1, asn1=True)

    # 加密数据
    print('开始加密：', file_path)
    encrypted_data = sm2_crypt.encrypt(data)

    # 将加密结果写入新文件
    encrypted_file_path = file_path + '.encrypted'
    with open(encrypted_file_path, 'wb') as f:
        f.write(encrypted_data)

    return encrypted_file_path

if __name__ == '__main__':
    file_path = input('请输入需要加密的文件：')
    pub_key = input('请输入SM2公钥：')

    # 加密文件
    encrypted_file = encrypt_file(file_path, pub_key)
    print('加密后的文件:', encrypted_file)

SM2解密文件

from gmssl import sm2

def decrypt_file(encrypted_file_path, pri_key):
    # 读取加密文件内容
    with open(encrypted_file_path, 'rb') as f:
        encrypted_data = f.read()

    # 初始化SM2解密对象
    sm2_crypt = sm2.CryptSM2(private_key=pri_key, public_key='', mode=1, asn1=True)

    # 解密数据
    print('开始解密：', encrypted_file_path)
    decrypted_data = sm2_crypt.decrypt(encrypted_data)

    # 将解密结果写入新文件
    decrypted_file_path = encrypted_file_path.replace('.encrypted', '.decrypted.' + encrypted_file_path.split('.')[-2])
    with open(decrypted_file_path, 'wb') as f:
        f.write(decrypted_data)

    return decrypted_file_path

if __name__ == "__main__":
    file_path = input('请输入需要解密的文件：')
    pri_key = input('请输入与SM2公钥对应的私钥：')

    # 解密文件
    decrypted_file = decrypt_file(file_path, pri_key)
    print("解密后的文件:", decrypted_file)