C#.net实现密码加密算法
//SHA-1算法
string password =
System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(Password.Text,
"SHA1");
//MD5算法
string password1 =
System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(Password.Text,
"MD5");
加密后生成不可逆密文保存到数据库中。用户登录时用加密计算后的密文与数据库中的密码密文比较。一致则通过验证,不一致则返回登录错误。
这种加密算法是不可逆的,所以除了用户自己,其他人无法得知用户的真实密码内容。
SHA-1算法和MD5算法的区别:
SHA-1比MD5多32位密文,所以更安全。由于同样的原因,MD5比SHA-1的运算速度更快。
加密算法总汇
方法一:
//须添加对System.Web的引用
using System.Web.Security;
...
/// <summary>
/// SHA1加密字符串
///
</summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public string
SHA1(string source)
{
return
FormsAuthentication.HashPasswordForStoringInConfigFile(source, "SHA1");
}
/// <summary>
/// MD5加密字符串
///
</summary>
/// <param name="source">源字符串</param>
/// <returns>加密后的字符串</returns>
public string
MD5(string source)
{
return
FormsAuthentication.HashPasswordForStoringInConfigFile(source, "MD5");;
}
方法二(可逆加密解密):
using System.Security.Cryptography;
...
public string Encode(string data)
{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
DESCryptoServiceProvider cryptoProvider = new
DESCryptoServiceProvider();
int i = cryptoProvider.KeySize;
MemoryStream ms = new MemoryStream();
CryptoStream cst =
new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV),
CryptoStreamMode.Write);
StreamWriter sw = new
StreamWriter(cst);
sw.Write(data);
sw.Flush();
cst.FlushFinalBlock();
sw.Flush();
return
Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
}
public string Decode(string data)
{
byte[]
byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[]
byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
byte[] byEnc;
try
{
byEnc =
Convert.FromBase64String(data);
}
catch
{
return null;
}
DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
MemoryStream ms = new MemoryStream(byEnc);
CryptoStream
cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV),
CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cst);
return sr.ReadToEnd();
}
方法三(MD5不可逆):
using
System.Security.Cryptography;
...
//MD5不可逆加密
//32位加密
public string GetMD5_32(string s,
string _input_charset)
{
MD5 md5 = new
MD5CryptoServiceProvider();
byte[] t =
md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
StringBuilder sb = new StringBuilder(32);
for (int i = 0; i <
t.Length; i++)
{
sb.Append(t[i].ToString("x").PadLeft(2, '0'));
}
return
sb.ToString();
}
//16位加密
public static string
GetMd5_16(string ConvertString)
{
MD5CryptoServiceProvider
md5 = new MD5CryptoServiceProvider();
string t2 =
BitConverter.ToString(md5.ComputeHash(UTF8Encoding.Default.GetBytes(ConvertString)),
4, 8);
t2 = t2.Replace("-", "");
return t2;
}
方法四(对称加密):
using System.IO;
using
System.Security.Cryptography;
...
private
SymmetricAlgorithm mobjCryptoService;
private string Key;
///
<summary>
/// 对称加密类的构造函数
/// </summary>
public SymmetricMethod()
{
mobjCryptoService = new
RijndaelManaged();
Key =
"Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
}
/// <summary>
/// 获得密钥
///
</summary>
/// <returns>密钥</returns>
private byte[] GetLegalKey()
{
string sTemp = Key;
mobjCryptoService.GenerateKey();
byte[] bytTemp =
mobjCryptoService.Key;
int KeyLength = bytTemp.Length;
if (sTemp.Length > KeyLength)
sTemp = sTemp.Substring(0,
KeyLength);
else if (sTemp.Length < KeyLength)
sTemp = sTemp.PadRight(KeyLength, ' ');
return
ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 获得初始向量IV
/// </summary>
///
<returns>初试向量IV</returns>
private byte[] GetLegalIV()
{
string sTemp =
"E4ghj*Ghg7!rNIfb&95GUY86GfghUb#er57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
mobjCryptoService.GenerateIV();
byte[] bytTemp =
mobjCryptoService.IV;
int IVLength = bytTemp.Length;
if
(sTemp.Length > IVLength)
sTemp = sTemp.Substring(0,
IVLength);
else if (sTemp.Length < IVLength)
sTemp = sTemp.PadRight(IVLength, ' ');
return
ASCIIEncoding.ASCII.GetBytes(sTemp);
}
/// <summary>
/// 加密方法
/// </summary>
/// <param
name="Source">待加密的串</param>
///
<returns>经过加密的串</returns>
public string Encrypto(string
Source)
{
byte[] bytIn = UTF8Encoding.UTF8.GetBytes(Source);
MemoryStream ms = new MemoryStream();
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV =
GetLegalIV();
ICryptoTransform encrypto =
mobjCryptoService.CreateEncryptor();
CryptoStream cs = new
CryptoStream(ms, encrypto, CryptoStreamMode.Write);
cs.Write(bytIn,
0, bytIn.Length);
cs.FlushFinalBlock();
ms.Close();
byte[] bytOut = ms.ToArray();
return
Convert.ToBase64String(bytOut);
}
/// <summary>
/// 解密方法
/// </summary>
/// <param
name="Source">待解密的串</param>
///
<returns>经过解密的串</returns>
public string Decrypto(string
Source)
{
byte[] bytIn = Convert.FromBase64String(Source);
MemoryStream ms = new MemoryStream(bytIn, 0, bytIn.Length);
mobjCryptoService.Key = GetLegalKey();
mobjCryptoService.IV = GetLegalIV();
ICryptoTransform encrypto =
mobjCryptoService.CreateDecryptor();
CryptoStream cs = new
CryptoStream(ms, encrypto, CryptoStreamMode.Read);
StreamReader sr =
new StreamReader(cs);
return sr.ReadToEnd();
}
方法五:
using System.IO;
using
System.Security.Cryptography;
using System.Text;
...
//默认密钥向量
private static byte[] Keys = { 0x12, 0x34,
0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/// <summary>
///
DES加密字符串
/// </summary>
/// <param
name="encryptString">待加密的字符串</param>
/// <param
name="encryptKey">加密密钥,要求为8位</param>
///
<returns>加密成功返回加密后的字符串,失败返回源串</returns>
public static string
EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey =
Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV
= Keys;
byte[] inputByteArray =
Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider
dCSP = new DESCryptoServiceProvider();
MemoryStream mStream =
new MemoryStream();
CryptoStream cStream = new
CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV),
CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0,
inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param
name="decryptString">待解密的字符串</param>
/// <param
name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
///
<returns>解密成功返回解密后的字符串,失败返源串</returns>
public static string
DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey =
Encoding.UTF8.GetBytes(decryptKey);
byte[] rgbIV = Keys;
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey,
rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray,
0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
方法六(文件加密):
using System.IO;
using
System.Security.Cryptography;
using System.Text;
...
//加密文件
private static void EncryptData(String inName,
String outName, byte[] desKey, byte[] desIV)
{
//Create the
file streams to handle the input and output files.
FileStream fin =
new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream
fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help
with read and write.
byte[] bin = new byte[100]; //This is
intermediate storage for the encryption.
long rdlen =
0; //This is the total number of bytes written.
long
totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be
written at a time.
DES des = new
DESCryptoServiceProvider();
CryptoStream encStream = new
CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the
output file.
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
encStream.Close();
fout.Close();
fin.Close();
}
//解密文件
private static void DecryptData(String inName,
String outName, byte[] desKey, byte[] desIV)
{
//Create the
file streams to handle the input and output files.
FileStream fin =
new FileStream(inName, FileMode.Open, FileAccess.Read);
FileStream
fout = new FileStream(outName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0);
//Create variables to help
with read and write.
byte[] bin = new byte[100]; //This is
intermediate storage for the encryption.
long rdlen =
0; //This is the total number of bytes written.
long
totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be
written at a time.
DES des = new
DESCryptoServiceProvider();
CryptoStream encStream = new
CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the
output file.
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
encStream.Close();
fout.Close();
fin.Close();
}
using System;
using
System.Security.Cryptography;//这个是处理文字编码的前提
using System.Text;
using
System.IO;
/// <summary>
/// DES加密方法
/// </summary>
///
<param name="strPlain">明文</param>
/// <param
name="strDESKey">密钥</param>
/// <param
name="strDESIV">向量</param>
///
<returns>密文</returns>
public string DESEncrypt(string
strPlain,string strDESKey,string strDESIV)
{
//把密钥转换成字节数组
byte[]
bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
//把向量转换成字节数组
byte[]
bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
//声明1个新的DES对象
DESCryptoServiceProvider
desEncrypt=new DESCryptoServiceProvider();
//开辟一块内存流
MemoryStream
msEncrypt=new MemoryStream();
//把内存流对象包装成加密流对象
CryptoStream
csEncrypt=new
CryptoStream(msEncrypt,desEncrypt.CreateEncryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Write);
//把加密流对象包装成写入流对象
StreamWriter
swEncrypt=new
StreamWriter(csEncrypt);
//写入流对象写入明文
swEncrypt.WriteLine(strPlain);
//写入流关闭
swEncrypt.Close();
//加密流关闭
csEncrypt.Close();
//把内存流转换成字节数组,内存流现在已经是密文了
byte[]
bytesCipher=msEncrypt.ToArray();
//内存流关闭
msEncrypt.Close();
//把密文字节数组转换为字符串,并返回
return
UnicodeEncoding.Unicode.GetString(bytesCipher);
}
///
<summary>
/// DES解密方法
/// </summary>
/// <param
name="strCipher">密文</param>
/// <param
name="strDESKey">密钥</param>
/// <param
name="strDESIV">向量</param>
///
<returns>明文</returns>
public string DESDecrypt(string
strCipher,string strDESKey,string strDESIV)
{
//把密钥转换成字节数组
byte[]
bytesDESKey=ASCIIEncoding.ASCII.GetBytes(strDESKey);
//把向量转换成字节数组
byte[]
bytesDESIV=ASCIIEncoding.ASCII.GetBytes(strDESIV);
//把密文转换成字节数组
byte[]
bytesCipher=UnicodeEncoding.Unicode.GetBytes(strCipher);
//声明1个新的DES对象
DESCryptoServiceProvider
desDecrypt=new
DESCryptoServiceProvider();
//开辟一块内存流,并存放密文字节数组
MemoryStream
msDecrypt=new MemoryStream(bytesCipher);
//把内存流对象包装成解密流对象
CryptoStream
csDecrypt=new
CryptoStream(msDecrypt,desDecrypt.CreateDecryptor(bytesDESKey,bytesDESIV),CryptoStreamMode.Read);
//把解密流对象包装成读出流对象
StreamReader
srDecrypt=new StreamReader(csDecrypt);
//明文=读出流的读出内容
string
strPlainText=srDecrypt.ReadLine();
//读出流关闭
srDecrypt.Close();
//解密流关闭
csDecrypt.Close();
//内存流关闭
msDecrypt.Close();
//返回明文
return
strPlainText;
}
C#.net实现密码加密算法的更多相关文章
- MD5 密码加密算法 系统等待
MD5 密码加密算法 public static String md(String md, String pass) { MessageDigest m; String passok = " ...
- SICAU教务系统登录密码加密算法的VB方式实现
关于一个算法.这个算法是SICAU教务系统在账号登录时采取的一个加密算法.算法的实现并不复杂. 具体如下: Function Form1pwdvalue(ByVal pwdvalue As Strin ...
- Java调用K3Cloud的密码加密算法实现登录密码检验
背景: 最近要开始做K3Cloud移动,BOS平台的移动单据收费,就想单独做移动模块,搭建环境:后台SSH2,前端Android.在手机端登录时通过Ajax方式传递用户名和密码到后台校验,后台在去K3 ...
- 7-30 jmu-python-凯撒密码加密算法 (10 分)
编写一个凯撒密码加密程序,接收用户输入的文本和密钥k,对明文中的字母a-z和字母A-Z替换为其后第k个字母. 输入格式: 接收两行输入,第一行为待加密的明文,第二行为密钥k. 输出格式: 输出加密后的 ...
- 12 Spring Boot密码加密算法
- 重写AgileEAS.NET SOA 中间件平台账号密码的加密算法
一.平台简介 AgileEAS.NET SOA 中间件平台是一款基于基于敏捷并行开发思想和Microsoft .Net构件(组件)开发技术而构建的一个快速开发应用平台.用于帮助中小型软件企业建立一条适 ...
- Vigenère密码
来源 NOIP2012复赛 提高组 第一题 描述 16世纪法国外交家Blaise de Vigenère设计了一种多表密码加密算法--Vigenère密码.Vigenère密码的加密解密算法简单易用 ...
- [NOIP2012] 提高组 洛谷P1079 Vigenère 密码
题目描述 16 世纪法国外交家 Blaise de Vigenère 设计了一种多表密码加密算法――Vigenère 密 码.Vigenère 密码的加密解密算法简单易用,且破译难度比较高,曾在美国南 ...
- NOIp 2012 #1 Vigenère 密码 Label:模拟
题目描述 16 世纪法国外交家 Blaise de Vigenère 设计了一种多表密码加密算法――Vigenère 密 码.Vigenère 密码的加密解密算法简单易用,且破译难度比较高,曾在美国南 ...
随机推荐
- Centos ssh 登陆乱码解决办法
1.vi /etc/sysconfig/i18n 将内容改为 LANG="zh_CN.GB18030"LANGUAGE="zh_CN.GB18030:zh_CN.GB23 ...
- Jquery~$when_done_then的用法
对于$.ajax请求来说,如果层级比较多,程序看起来会比较乱,而为了解决这种问题,才有了$when...done...fail...then的封装,它将$.ajax这嵌套结构转成了顺序平行的结果,向下 ...
- Gradle命令详解与导入第三方包
Android Studio + Gradle的组合用起来非常方便,很多第三方开源项目也早都迁移到了Studio,为此今天就来介绍下查看.编译并导入第三方开源项目的方法. Sublime + Term ...
- 此方法显式使用的 CAS 策略已被 .NET Framework 弃用
用vs2008开发的应用程序在vs2012中打开时提示如下: 此方法显式使用的 CAS 策略已被 .NET Framework 弃用.若要出于兼容性原因而启用 CAS 策略,请使用 NetFx40_L ...
- NET平台下的Excel编程|C#操作Excel|Application和ApplicationClass的联系和区别
NET平台下的Excel编程|C#操作Excel|Application和ApplicationClass的联系和区别 1. Interop含义Interop是互操作的含义.Microsoft.Off ...
- Hadoop配置项整理(mapred-site.xml)【转】
本文转自:http://slaytanic.blog.51cto.com/2057708/1101360 name value Description hadoop.job.history.locat ...
- 利用TOAD实现把EXCEL数据导入oracle数据库
利用TOAD实现把EXCEL数据导入oracle数据库 工具: Toad11.7z(百度搜索,直接下载) 1.将Excel文件中某些字段导入到Oracle数据库的对应表 连接想要导入的数据库 ,然 ...
- Swift - 10 - assert(断言)
//: Playground - noun: a place where people can play import UIKit var str = "Hello, playground& ...
- MySQL 序列使用
MySQL 序列使用 MySQL序列是一组整数:1, 2, 3, ...,由于一张数据表只能有一个字段自增主键, 如果你想实现其他字段也实现自动增加,就可以使用MySQL序列来实现. 本章我们将介绍如 ...
- JavaScript--函数-01
函数的本质: function:创建一个函数对象的意思 什么是函数对象: 专门封装一个函数定义的存储空间 其实,函数是一个引用类型的对象 函数名,其实是一个引用函数对象的变量 函数只有在调用时才执行, ...