js 实现

<script src="js/jsencrypt.min.js"></script>

var encrypt = new JSEncrypt();
            encrypt.setPublicKey(pubKey);

         # 加密
            return encrypt.encrypt(pwd);

# pubKey 后端传入的密码

# pwd  是用户输入的密码

python 后端实现

安装模块： pip3 install pycryptodome 

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5, PKCS1_OAEP

import base64

      生成密钥：  

      key = RSA.generate(1024)
        exportKey = key.publickey().exportKey()
        encrypted_key = key.exportKey()
        # 秘钥
        request.session['encrypted_key'] = bytes.decode(encrypted_key)
        # 公钥
        request.session['exportKey'] = bytes.decode(exportKey)

解密： 

def decrypt_password(request, password):
    confirmpassword = base64.b64decode(password)
    encrypted_key = request.session['encrypted_key']
    encrypted_key = RSA.import_key(encrypted_key)
    cipher_rsa2 = PKCS1_v1_5.new(encrypted_key)
    data = cipher_rsa2.decrypt(confirmpassword, None)
    password = bytes.decode(data)

    return password

以上代码每个功能可以单独写一个函数，具体需求自己定义