Python_pycrypto_加密解密

安装

在 Windows环境安装 pycryptodome 模块   pip install pycryptodome 

在 Linux环境安装 pycrypto模块   pip install pycrypto 

使用AES实现对称加解密

AES加密方式有五种：ECB, CBC, CTR, CFB, OFB，具体使用哪种根据项目情况而定。

下面是采用 ECB并以pkcs7填充的加密与解密方法

import base64

from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad


def aes_encrypt(secret_key, data):
    """加密数据
    :param secret_key: 加密秘钥
    :param data: 需要加密数据
    """
    data = bytes(data, encoding="utf-8")
    # 填充数据采用pkcs7
    data = pad(data, block_size=16, style="pkcs7")
    # 创建加密器
    cipher = AES.new(key=secret_key.encode("utf-8"), mode=AES.MODE_ECB)
    # 对数据进行加密
    encrypted_data = cipher.encrypt(data)
    # 对数据进行base64编码
    encrypted_data = base64.b64encode(encrypted_data)
    return encrypted_data.decode()


def aes_decrypt(secret_key, data):
    """解密数据
    """
    data = base64.b64decode(data)
    cipher = AES.new(key=secret_key.encode("utf-8"), mode=AES.MODE_ECB)
    decrypt_data = cipher.decrypt(data)
    decrypt_data = unpad(decrypt_data, 16, style="pkcs7")
    return decrypt_data.decode("utf-8")


if __name__ == '__main__':
    key = "22a1d4c4263e83d7f8c33a321eb19ae7"
    data = "asdASD73j8H9k6C1asvhBOK0PXOzJM7dsqXysssW"
    print("原始数据：%s" % data)
    r = aes_encrypt(key, data)
    print("加密数据：%s" % r)
    r = aes_decrypt("22a1d4c4263e83d7f8c33a321eb19ae7", r)
    print("解密数据：%s" % r)

执行情况如下

使用RAS实现非对称加解密

# -*- coding: utf-8 -*-

from Crypto import Random
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
import base64


def get_key():
    """生成公私钥"""
    # 生成rsa算法实例
    rsa = RSA.generate(1024, Random.new().read)
    # 生成公钥私钥
    private_pem = rsa.exportKey()
    public_pem = rsa.publickey().exportKey()

    return {
        "public_key": public_pem.decode(),
        "private_key": private_pem.decode()
    }


def rsa_encrypt(data, public_key):
    """公钥加密"""
    # 加载公钥
    rsakey = RSA.importKey(public_key)
    # 生成密码器
    cipher = PKCS1_v1_5.new(rsakey)
    # 加密数据。注意，在python3中加密的数据必须是bytes类型的数据，不能是str类型的数据
    encrypt_data = cipher.encrypt(data.encode(encoding="utf-8"))
    # # 对数据进行base64编码
    encrypt_data = base64.b64encode(encrypt_data)
    # 公钥每次加密的结果不一样。原因是每次padding的数据不一样
    return encrypt_data.decode()


def rsa_decrypt(cipher_data, private_key):
    """私钥解密"""
    # 加载私钥
    rsakey = RSA.importKey(private_key)
    # 生成密码器
    cipher = PKCS1_v1_5.new(rsakey)
    # 将密文解密成明文，返回的是一个bytes类型数据，需要自己转换成str
    decrypt_data = cipher.decrypt(base64.b64decode(cipher_data), "解密失败")
    return decrypt_data.decode()


if __name__ == '__main__':
    # k = get_key()
    # public_key = k.get("public_key")
    # private_key = k.get("private_key")
    #
    # print(public_key)
    # print(private_key)

    public_key = """-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDKF7UTc5K61xMUKrCtld0dYJf/
KjT5P+R3H8n8my8aEYqUaWQjO3CkQGsLN//5Tbs8g5Of4vAkqytoleWxSQxFGO7T
YuOQ7UtvRhKqTKvX8PvDnKX7ebKzw3zIXt1QDRbc2bJTqVAbPDdT1DNvyocQdCMC
BtPA2algMRs4Zq0qpwIDAQAB
-----END PUBLIC KEY-----
    """
    private_key = """-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
    """

    data = "hello python!"
    cipher_data = rsa_encrypt(data, public_key)
    print(cipher_data)

    decrypt_data = rsa_decrypt(cipher_data, private_key)
    print(decrypt_data)

执行结果