des

PHP script for DES/CBC/ with PKCS5Padding encryption and decryption

三世轮回 提交于 2019-12-01 09:30:40
I would like to know in the following code if PKCS#5 padding is added ? If not how to add ? $message = "insert plaintext message here"; $iv = pack('H*', 'insert hex iv here'); $key = pack('H*', 'insert hex key here'); $enc = mcrypt_encrypt(MCRYPT_DES, $key, $message, MCRYPT_MODE_CBC, $iv); echo bin2hex($enc); I also want to create a PHP code to decrypt a string created with DES/CBC/PKCS5Padding. I think the above mentioned code can be modified to get a decryption. The important thing for me is to get the PKCS#5 Padding and Unpadding script. No, it is not added. Unfortunately PHP / mcrypt uses

PHP script for DES/CBC/ with PKCS5Padding encryption and decryption

浪子不回头ぞ 提交于 2019-12-01 09:24:02
问题 I would like to know in the following code if PKCS#5 padding is added ? If not how to add ? $message = "insert plaintext message here"; $iv = pack('H*', 'insert hex iv here'); $key = pack('H*', 'insert hex key here'); $enc = mcrypt_encrypt(MCRYPT_DES, $key, $message, MCRYPT_MODE_CBC, $iv); echo bin2hex($enc); I also want to create a PHP code to decrypt a string created with DES/CBC/PKCS5Padding. I think the above mentioned code can be modified to get a decryption. The important thing for me

DES、3DES加密算法(转载整理)

依然范特西╮ 提交于 2019-12-01 03:33:27
文章1: 这一篇文章要解决数据加密——数据补位的问题、DES算法的两种模式ECB和CBC问题以及更加安全的算法——3DES算法。 一、数据补位 DES数据加解密就是将数据按照8个字节一段进行DES加密或解密得到一段8个字节的密文或者明文,最后一段不足8个字节,按照需求补足8个字节(通常补00或者FF,根据实际要求不同)进行计算,之后按照顺序将计算所得的数据连在一起即可。 这里有个问题就是为什么要进行数据补位?主要原因是DES算法加解密时要求数据必须为8个字节。 二、ECB模式 DES ECB(电子密本方式)其实非常简单,就是将数据按照8个字节一段进行DES加密或解密得到一段8个字节的密文或者明文,最后一段不足8个字节,按照需求补足8个字节进行计算,之后按照顺序将计算所得的数据连在一起即可,各段数据之间互不影响。 三、CBC模式 DES CBC(密文分组链接方式)有点麻烦,它的实现机制使加密的各段数据之间有了联系。其实现的机理如下: 加密步骤如下: 1)首先将数据按照8个字节一组进行分组得到D1D2......Dn(若数据不是8的整数倍,用指定的PADDING数据补位) 2)第一组数据D1与初始化向量I异或后的结果进行DES加密得到第一组密文C1(初始化向量I为全零) 3)第二组数据D2与第一组的加密结果C1异或以后的结果进行DES加密,得到第二组密文C2 4)之后的数据以此类推

android 3des加密Could not instantiate bean class ...

こ雲淡風輕ζ 提交于 2019-12-01 03:32:56
com.sun.crypto.provider.SunJCE Could not instantiate bean class [com.lz.monitor.alert.service.ServiceImp]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com.sun.crypto.provider.SunJCE Caused by: java.lang.NoClassDefFoundError: com.sun.crypto.provider.SunJCE 3DES加密解密调用示例 文章分类:Java编程 关键字: 3des加密解密调用示例 在java中调用sun公司提供的3DES加密解密算法时,需要使用到$JAVA_HOME/jre/lib/目录下如下的4个jar包: jce.jar security/US_export_policy.jar security/local_policy.jar ext/sunjce_provider.jar Java运行时会自动加载这些包,因此对于带main函数的应用程序不需要设置到CLASSPATH环境变量中。对于WEB应用,不需要把这些包加到WEB-INF/lib目录下。 来源: oschina 链接: https:/

C# to Java DES encryption

十年热恋 提交于 2019-12-01 02:01:45
Trying to create java class which will encrypt and decrypt as like C# code in below. Below is my code for C#, I need to convert it to Java. Can someone help me how to do it? I've been doing this for almost 2 days yet can't find any solutions on how to convert it. I am new to crypto. Note - It seems C# code used ACME libraries. But in my java, i should not use ACME jar files. public static string EncryptBase64(string key, string clearText) { if (key.Length > 8) key = key.Substring(0, 8); byte[] keyBytes = System.Text.Encoding.ASCII.GetBytes(key); byte[] clearBytes = GetClearTextBytes(clearText)

Generating and using two keys for encryption and decryption in Java

和自甴很熟 提交于 2019-12-01 01:45:53
I am working on a Java application which requires I use two keys generated from different Strings for encrypting and decrypting. One String is coming from user and other is master key. I looked on net and found a few references regarding it. I would really like some help in knowing how to implement this. I will show what I have now. So as you can see from code, I used some code from other stackoverflow post and modified it a bit. I just don't know how to generate the 2 keys from 2 Strings and from where I can get the SecretKey desKey used for decryption. Code : public class Encryption { public

Generating and using two keys for encryption and decryption in Java

丶灬走出姿态 提交于 2019-11-30 21:04:57
问题 I am working on a Java application which requires I use two keys generated from different Strings for encrypting and decrypting. One String is coming from user and other is master key. I looked on net and found a few references regarding it. I would really like some help in knowing how to implement this. I will show what I have now. So as you can see from code, I used some code from other stackoverflow post and modified it a bit. I just don't know how to generate the 2 keys from 2 Strings and

Reading encrypted data from a file

帅比萌擦擦* 提交于 2019-11-30 17:03:54
I was going through an IBM tutorial on encrypting using Private key. And I wrote the code as below import java.security.*; import javax.crypto.*; // encrypt and decrypt using the DES private key algorithm public class PrivateExample { public static void main (String[] args) throws Exception { String text=new String(); text="THIS IS AN ENCRYPTION TEST"; byte[] plainText = text.getBytes("UTF8"); // get a DES private key System.out.println( "\nStart generating DES key" ); KeyGenerator keyGen = KeyGenerator.getInstance("DES"); keyGen.init(56); Key key = keyGen.generateKey(); System.out.println(

iOS,一行代码进行RSA、DES 、AES、MD5加密、解密

不打扰是莪最后的温柔 提交于 2019-11-30 08:41:43
iOS,一行代码进行RSA、DES 、AES、MD5加密、解密 加密的Demo,欢迎下载 java端的加密解密,读者可以看我同事的这篇文章 http://www.jianshu.com/p/98569e81cc0b 最近做了一个移动项目,是有服务器和客户端类型的项目,客户端是要登录才行的,服务器也会返回数据,服务器是用Java开发的,客户端要同时支持多平台(Android、iOS),在处理iOS的数据加密的时候遇到了一些问题。起初采取的方案是DES加密,老大说DES加密是对称的,网络抓包加上反编译可能会被破解,故采取RSA方式加密。RSA加密时需要公钥和私钥,客户端保存公钥加密数据,服务器保存私钥解密数据。(iOS端公钥加密私钥解密、java端公钥加密私钥解密,java端私钥加密公钥解密都容易做到,iOS不能私钥加密公钥解密,只能用于验签)。 问题 问题1:iOS端公钥加密的数据用Java端私钥解密。 iOS无论使用系统自带的sdk函数,用mac产生的或者使用java的jdk产生的公钥和私钥,进行加密解密自己都可以使用。不过ios加密,java解密,或者反过来就不能用了。要么是无法创建报告个-9809或-50的错误,要么解出来是乱码。ios系统函数种只有用公钥加密,私钥解密的方式。而公钥加密每次结果都不同。 MAC上生成公钥、私钥的方法,及使用 1.打开终端

Reading encrypted data from a file

岁酱吖の 提交于 2019-11-29 23:51:53
问题 I was going through an IBM tutorial on encrypting using Private key. And I wrote the code as below import java.security.*; import javax.crypto.*; // encrypt and decrypt using the DES private key algorithm public class PrivateExample { public static void main (String[] args) throws Exception { String text=new String(); text="THIS IS AN ENCRYPTION TEST"; byte[] plainText = text.getBytes("UTF8"); // get a DES private key System.out.println( "\nStart generating DES key" ); KeyGenerator keyGen =