subkeylist=createSubkey(key)# 获得Ln 和 Rn Ln=InitKeyCode[0:32]Rn=InitKeyCode[32:]# 如果是解密的过程 把子密钥数字逆过来 就变成解密过程了if(flag=="-1"):subkeylist=subkeylist[::-1]forsubkeyinsubkeylist:whilelen(Rn)<32:Rn="0"+Rnwhil
DES加密是三大著名且经典的加密算法之一,为分组对称加密算法。DES算法(或国产等效算法)在POS、ATM、磁卡及智能卡(IC卡)、加油站、高速公路收费站等领域被广泛应用,以此来实现关键数据的保密,如信用卡持卡人的PIN的加密传输,IC卡与POS间的双向认证、金融交易数据包的MAC(消息鉴别码Message Authentication Code)校验等。
#This is a pure python implementation of the DES encryption algorithm.#It's pure python to avoid portability issues, since most DES#implementations are programmed in C (for performance reasons).# #Triple DES class is also implemented, utilising the DES base. Triple DES#is either DES-EDE3 wit...
# This is a pure python implementation of the DES encryption algorithm. # It's pure python to avoid portability issues, since most DES # implementations are programmed in C (for performance reasons). # # Triple DES class is also implemented, utilising the DES base. Triple DES # is either ...
priKey = RSA.importKey(private_keyBytes)# priKey = RSA.importKey(privateKey)signer = PKCS1_v1_5.new(priKey,)# SIGNATURE_ALGORITHM = "MD5withRSA"hash_obj = MD5.new(data.encode('utf-8'))# SIGNATURE_ALGORITHM = "SHA1withRSA"# hash_obj = SHA1.new(data.encode('utf-8'))# SIGNATU...
一、背景与历史 数据加密标准(Data Encryption Standard,DES)也称为数据加密算法(Data Encryption Algorithm,DEA)(ANSI)和DEA-1(ISO),是最近20年来使用的加密算法。介绍DES的细节还有两个作用:第一:介绍DES;第二,更重要的是分析和理解实际的加密算法。利用这个方法,我们还要从概念上介绍其他的加密算法,但不准备深...
### Author: Todd Whiteman# Date: 16th March, 2009# Verion: 2.0.0# License: Public Domain - free to do as you wish# Homepage: http://twhiteman.netfirms.com/des.html## This is a pure python implementation of the DES encryption algorithm.# It's pure python to avoid portability issues...
#This is a pure python implementation of the DES encryption algorithm.#It's pure python to avoid portability issues, since most DES#implementations are programmed in C (for performance reasons).# #Triple DES class is also implemented, utilising the DES base. Triple DES#is either DES-EDE3 wit...
[i + 8 * j]; } } } /* * 异或函数 * 将数组 INA 和 INB 进行异或操作,并且保存在 INA 中 */ void Xor(int *INA, int *INB, int len) { for (int i = 0; i<len; i++) { *(INA + i) = *(INA + i) ^ *(INB + i); } } /* * IP 初始置换函数 * IP 根据 IP ...
# This is a pure python implementation of the DES encryption algorithm.# It's pure python to avoid portability issues, since most DES # implementations are programmed in C (for performance reasons).# # Triple DES class is also implemented, utilising the DES base. Triple DES # is either DES...