from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex


class prpcrypt():
    def __init__(self, key):
        self.key = key
        self.mode = AES.MODE_CBC

    # 加密函数，如果text不是16的倍数【加密文本text必须为16的倍数！】，那就补足为16的倍数
    def encrypt(self, text):
        cryptor = AES.new(self.key, self.mode, self.key)
        # 这里密钥key 长度必须为16（AES-128）、24（AES-192）、或32（AES-256）Bytes 长度.目前AES-128足够用
        length = 16
        count = len(text)
        add = length - (count % length)
        text = text + (' ' * add)
        self.ciphertext = cryptor.encrypt(text)
        # 因为AES加密时候得到的字符串不一定是ascii字符集的，输出到终端或者保存时候可能存在问题
        # 所以这里统一把加密后的字符串转化为16进制字符串
        return b2a_hex(self.ciphertext)

    # 解密后，去掉补足的空格用strip() 去掉
    def decrypt(self, text):
        cryptor = AES.new(self.key, self.mode, self.key)
        plain_text = cryptor.decrypt(a2b_hex(text))
        print(plain_text)
        strip_text = plain_text.rstrip()
        str_text = strip_text.decode()
        return str_text

users = []
passwords = []
pc = prpcrypt('keys1234keys1234')

try:
    data = open("./Users/Users.txt", 'r')
    for each_line in data:
        Line = each_line.replace('\n', '')
        line = Line.encode(encoding='utf-8')
        try:
            decode_line = pc.decrypt(line)
            (user, pw) = decode_line.split(':', 1)
            users.append(user)
            passwords.append(pw)
            print(user + pw)
        except ValueError:
            pass
    data.close()
except IOError:
    print('decode error!')

