将DES解密用Python实现

将此段代码用python实现

var CryptoJS = require("crypto-js");
var ciphertext = "1MpdxK203+ZrnyxuJRrYatKSBxHUIi1TSdQF2BQKXOG54plwfaB2GA==";
var key = CryptoJS.enc.Utf8.parse("11");
var parsedCiphertext = CryptoJS.enc.Base64.parse(ciphertext);
var decrypted = CryptoJS.DES.decrypt(
    {
      ciphertext: parsedCiphertext
    },
    key,
    {
      mode: CryptoJS.mode.ECB,
      padding: CryptoJS.pad.Pkcs7
    }
  );
var plaintext = decrypted.toString(CryptoJS.enc.Utf8);
console.log(plaintext)

def encrypt(key, text, mode):
    '''
    DES加密
    :param key: 密钥
    :param text: 待加密文本
    :param mode: 模式
    :return:
    '''
    key = key
    text = text.encode('utf-8')
    pad_text = pad(text, DES.block_size, style='pkcs7')
    cipher = DES.new(key, mode)
    enc_data = cipher.encrypt(pad_text)
    return base64.b64encode(enc_data).decode('utf-8')


def decrypt(key, text, mode):
    '''
    DES解密
    :param key: 密钥
    :param text: 待解密文本
    :param mode: 模式
    :return:
    '''
    new_key = key
    new_text = base64.b64decode(text)  # base64解码
    cipher = DES.new(new_key, mode)
    dec_data = cipher.decrypt(new_text)
    return dec_data[:-dec_data[-1]].decode('utf-8') # 去除末尾填充的字符


if __name__ == "__main__":
    # 1MpdxK203+ZrnyxuJRrYatKSBxHUIi1TSdQF2BQKXOG54plwfaB2GA==
    key = b'11'
    key = key.ljust(8, b"\x00")
    print(key)
    pwd = '0587c1d12f7904ceed8613d8038b211c'
    enc_pwd = encrypt(key, pwd, DES.MODE_ECB)
    print(enc_pwd)
    dec_data = decrypt(key, enc_pwd, DES.MODE_ECB)
    print(dec_data)

注意： CryptoJS.enc.Utf8.parse(“11”); 如果不满8字节 DES.new(new_key, mode) 会报出异常，踩了很大的坑。
key = b’11’
key = key.ljust(8, b"\x00") 使用空字节补全