AES ECB模式加解密
使用cryptopp完成AES的ECB模式进行加解密。
AES加密数据块分组长度必须为128比特,密钥长度可以是128比特、192比特、256比特中的任意一个。(8比特 == 1字节)
在CBC、CFB、OFB、CTR模式下除了密钥外,还需要一个初始化向IV。(ECB模式不用IV)
代码:
# -*- coding=utf-8-*- from Crypto.Cipher import AES import os from Crypto import Random import base64 """ aes加密算法 padding : PKCS7 """ class AESUtil: __BLOCK_SIZE_16 = BLOCK_SIZE_16 = AES.block_size @staticmethod def encryt(str,key,iv): cipher = AES.new(key,AES.MODE_ECB,iv) x = AESUtil.__BLOCK_SIZE_16 - (len(str) % AESUtil.__BLOCK_SIZE_16) if x != 0: str = str + chr(x)*x msg = cipher.encrypt(str) # msg = base64.urlsafe_b64encode(msg).replace(‘=‘,‘‘) msg = base64.b64encode(msg) return msg @staticmethod def decrypt(enStr,iv) # enStr += (len(enStr) % 4)*"=" # decryptByts = base64.urlsafe_b64decode(enStr) decryptByts = base64.b64decode(enStr) msg = cipher.decrypt(decryptByts) paddingLen = ord(msg[len(msg)-1]) return msg[0:-paddingLen] if __name__ == "__main__": key = "1234567812345678" iv = "1234567812345678" res = AESUtil.encryt("123456",iv) print res # mdsm0RmB+xAKrTah3DG31A== print AESUtil.decrypt(res,iv) # 123456