Python AES_ECB_PKCS5加密代码

时间：2021-08-27 19:16:18

https://blog.csdn.net/u010978840/article/details/79035463

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#!/usr/bin/env python

# coding=utf-8

# Created by slowchen on 2018/1/10 13:48.

import base64

import re

from Crypto.Cipher import AES 

class AESECB:

    def __init__(self, key):

        self.key = key

        self.mode = AES.MODE_ECB

        self.bs = 16 # block size

        self.PADDING = lambda s: s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)

    def encrypt(self, text):

        generator = AES.new(self.key, self.mode) # ECB模式无需向量iv

        crypt = generator.encrypt(self.PADDING(text))

        crypted_str = base64.b64encode(crypt)

        result = crypted_str.decode()

        return result

    def decrypt(self, text):

        generator = AES.new(self.key, self.mode) # ECB模式无需向量iv

        text += (len(text) % 4) * '='

        decrpyt_bytes = base64.b64decode(text)

        meg = generator.decrypt(decrpyt_bytes) # 去除解码后的非法字符

        try:

            result = re.compile('[\\x00-\\x08\\x0b-\\x0c\\x0e-\\x1f\n\r\t]').sub('', meg.decode())

        except Exception:

            result = '解码失败，请重试!'

            return result 

if __name__ == '__main__':

    aes = AESECB('this is aes key!')

    print(aes.encrypt('pythonaes123456'))

    print(aes.decrypt('bvN4eERKQBOSXu5EpZ+rBw=='))

    print(aes.decrypt('yzm34N/bEY8kVJNeS93Gv1svJI77YPjaK1+mW+/A4FY=')) # python is very good

改善的代码

from Crypto.Cipher import AES

key = "****************"

mode = AES.MODE_ECB

bs = 16

PADDING = lambda s: s + (bs - len(s) % bs) * chr(bs - len(s) % bs)

PADDING = lambda s: s + (bs - len(s.encode()) % bs) * chr(bs - len(s.encode()) % bs)

def un_padding(padded_text):

    padded_len = ord(padded_text[-1])

    if padded_len >= 16:

        return padded_text

    if len(set(padded_text[-padded_len:])) > 1:

        return padded_text

    return padded_text[0:-padded_len]

text = "欢迎来到abc"

generator = AES.new(key, mode)

crypt = generator.encrypt(PADDING(text))

crypt_hex_string = crypt.hex()

crypted_text = "ec017a24e572d282eb8abbda44376cee"

generator = AES.new(key, mode)

#meg = generator.decrypt(crypt)

meg = generator.decrypt(bytes.fromhex(crypted_text))

decrypted_text =  meg.decode()

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