想做个MD5的加密,如何写代码?

呵呵，学一下这个东西
System.Security.Cryptography.MD5
网上找一下有一大堆的，呵呵，LZ努力吧========================================================
我一定要超过他！！！！！！
做出我最强的东西！！！！！
再和他一比高下！！！！！！
========================================================

System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(source,"MD5");

public static string EncryptMD5(string source,bool blnPwd)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(source,"MD5");
}

public static string EncryptMD5(string source)
{
return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(source,"MD5");
}

string md5Str = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5");楼上的兄弟正解，不过要注意一般会用md5Str.ToLower()转化一下来用

或者：using System.Security.Cryptography;public static string EncryptMD5(string source)
{
byte[] data = Encoding.Unicode.GetBytes(source.ToCharArray());
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(data);
string sResult = Encoding.Unicode.GetString(result);
return sResult;
}

Encoding.Unicode 这个是不是应该是 ASP.NET 中需要用到的

引用System.Security.Cryptographypublic static string MD5(string source)
{
byte[] data = Encoding.Unicode.GetBytes(source.ToCharArray());
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(data);
string sResult = Encoding.Unicode.GetString(result);
return sResult;
}
我做的时候只加密了密码，在数据里也显示加密的字串哦，

我的运行时显示 E:\Visual Studio Projects\WindowsApplication2\Form1.cs(120): 找不到类型或命名空间名称“Encoding”(是否缺少 using 指令或程序集引用？)
引用System.Security.Cryptography 我已经引用了 .我做的是 WINDOWS应用程序

using System.Web.Security;string pass=FormsAuthentication.HashPasswordForStoringInConfigFile(this.TextBox2.Text.Trim(),"SHA1"); //SHA1换成MD5就行了。就这么简单。

<%@ Page language="c#" %> 　　<%@ Import Namespace="System.Web.Security" %> 　　<html> 　　<head> 　　<script language="C#" runat="server"> 　　public void encryptString(Object sender, EventArgs e) 　　{ 　　SHA1.Text = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text,"SHA1"); 　　MD5.Text =FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text, "MD5") ; 　　} 　　</script>
　　</head>
　　<body> 　　<form runat="server" ID="Form1"> 　　<p> 　　<b>Original Clear Text Password: </b> 　　<br> 　　<asp:Textbox id="txtPassword" runat="server" /> 　　<asp:Button runat="server" text="Encrypt String" onClick="encryptString" ID="Button1" /> 　　</p> 　　<p> 　　<b>Encrypted Password In SHA1: </b> 　　　　<asp:label id="SHA1" runat="server" /> 　　</p> 　　<p> 　　<b>Encrypted Password In MD5: </b> 　　<asp:label id="MD5" runat="server" /> 　　</p> 　　</form> 　　</body> 　　</html> 　　正如你所看到的这样简单易用。我们可以把这段加密程序封装在一个函数里便于重复的使用。代码如下：　　public string EncryptPassword(string PasswordString,string PasswordFormat ) 　　{ 　　if (PasswordFormat="SHA1"){ 　　EncryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString ,"SHA1"); 　　} 　　elseif (PasswordFormat="MD5") 　　{ EncryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString ,"MD5"); 　　} 　　else 　　{ 　　EncryptPassword=""; 　　} 　　我们可以在数据库中添加一个字段，使用insert将加密的口令作为一个string存入数据库中。当用户登陆的时候，就可以将用户输入的口令加密结果和数据库中的正确结果比较，通过这种办法来验证口令的正确性了

不是ASP.NET哦. 呵呵

using System.Web .Security ;private void Button2_Click(object sender, System.EventArgs e)
{
this.TextBox1 .Text =FormsAuthentication.HashPasswordForStoringInConfigFile (this.TextBox1 .Text .Trim (),"md5");
}

using System.Web .Security ; //不存在此命名空间
我的机器只有
using Sytem.Web;

我有demo,要的话联系我253878078,写名:csdn

加了 CPUCN 332690958

不好意思，漏了个namespace
Encoding
using System.Text;

这样可以了吗？using System.Security.Cryptography;
using System.Text;public static string EncryptMD5(string source)
{
byte[] data = Encoding.Unicode.GetBytes(source.ToCharArray());
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(data);
string sResult = Encoding.Unicode.GetString(result);
return sResult;
}

我将结果给了一个textBox控件但是出来的东西都是乱码.

强调下,我做的是WINDOWS 应用程序.
Encoding.Unicode 和这个有关系么?

asp.net中用的是C#啊，你可以整理一下

asp.net与C#不是一回事,在asp.net中有专门的方法,但C#中是没有的同意 viena(维也纳nn-实心木头人)的方法

viena(维也纳nn-实心木头人) 首先感谢你的帮助.
但是用了你的方法,的确是行不通的,因为显示出来的内容都是乱码.
我想using System.Security.Cryptography;
using System.Text;public static string EncryptMD5(string source)
{
byte[] data = Encoding.Unicode.GetBytes(source.ToCharArray());
MD5 md5 = new MD5CryptoServiceProvider();
byte[] result = md5.ComputeHash(data);
string sResult = Encoding.Unicode.GetString(result);
return sResult;
}
用在ASP.NET 中应该是可以的吧.
我用C#做的WINDOWS应用程序.结果都是乱码
还恳请多多指教.
要不我们QQ联系:332690958

.Net框架由于拥有CLR提供的丰富库支持，只需很少的代码即可实现先前使用C等旧式语言很难实现的加密算法。本类实现一些常用机密算法，供参考。其中MD5算法返回Int的ToString字串。using System;
using System.IO;
using System.Data;
using System.Text;
using System.Diagnostics;
using System.Security;
using System.Security.Cryptography;namespace com.Quickline.Encrypt
{
/// <summary>
/// 类名：HashEncrypt
/// 作用：对传入的字符串进行Hash运算，返回通过Hash算法加密过的字串。
/// 属性：［无］
/// 构造函数额参数：
/// IsReturnNum:是否返回为加密后字符的Byte代码
/// IsCaseSensitive：是否区分大小写。
/// 方法：此类提供MD5，SHA1，SHA256，SHA512等四种算法，加密字串的长
度依次增大。
/// </summary>
public class HashEncrypt
{
  //private string strIN;
  private bool isReturnNum;
  private bool isCaseSensitive;

  public HashEncrypt(bool IsCaseSensitive,bool IsReturnNum)
  {
   this.isReturnNum = IsReturnNum;
   this.isCaseSensitive = IsCaseSensitive;
  }


  private string getstrIN(string strIN)
  {
   //string strIN = strIN;
   if (strIN.Length == 0)
   {
    strIN = "~NULL~";
   }
   if (isCaseSensitive == false)
   {
    strIN = strIN.ToUpper();
   }
   return strIN;
  }
  public string MD5Encrypt(string strIN)
  {
   //string strIN = getstrIN(strIN);
   byte[] tmpByte;
   MD5 md5 = new MD5CryptoServiceProvider();
   tmpByte =
md5.ComputeHash(GetKeyByteArray(getstrIN(strIN)));
   md5.Clear();   return GetStringValue(tmpByte);  }

  public string SHA1Encrypt(string strIN)
  {
   //string strIN = getstrIN(strIN);
   byte[] tmpByte;
   SHA1 sha1 = new SHA1CryptoServiceProvider();   tmpByte = sha1.ComputeHash(GetKeyByteArray(strIN));
   sha1.Clear();   return GetStringValue(tmpByte);  }  public string SHA256Encrypt(string strIN)
  {
   //string strIN = getstrIN(strIN);
   byte[] tmpByte;
   SHA256 sha256 = new SHA256Managed();   tmpByte =
sha256.ComputeHash(GetKeyByteArray(strIN));
   sha256.Clear();   return GetStringValue(tmpByte);  }  public string SHA512Encrypt(string strIN)
  {
   //string strIN = getstrIN(strIN);
   byte[] tmpByte;
   SHA512 sha512 = new SHA512Managed();   tmpByte =
sha512.ComputeHash(GetKeyByteArray(strIN));
   sha512.Clear();   return GetStringValue(tmpByte);  }

  /// <summary>
  /// 使用DES加密（Added by niehl 2005-4-6）
  /// </summary>
  /// <param name="originalValue">待加密的字符串</param>
  /// <param name="key">密钥(最大长度8)</param>
  /// <param name="IV">初始化向量(最大长度8)</param>
  /// <returns>加密后的字符串</returns>
  public string DESEncrypt(string originalValue,string key,string IV)
  {
   //将key和IV处理成8个字符
   key += "12345678";
   IV += "12345678";
   key = key.Substring(0,8);
   IV = IV.Substring(0,8);   SymmetricAlgorithm sa;
   ICryptoTransform ct;
   MemoryStream ms;
   CryptoStream cs;
   byte[] byt;   sa = new DESCryptoServiceProvider();
   sa.Key = Encoding.UTF8.GetBytes(key);
   sa.IV = Encoding.UTF8.GetBytes(IV);
   ct = sa.CreateEncryptor();   byt = Encoding.UTF8.GetBytes(originalValue);   ms = new MemoryStream();
   cs = new CryptoStream(ms, ct,
CryptoStreamMode.Write);
   cs.Write(byt, 0, byt.Length);
   cs.FlushFinalBlock();   cs.Close();   return Convert.ToBase64String(ms.ToArray());  }  public string DESEncrypt(string originalValue,string key)
  {
   return DESEncrypt(originalValue,key,key);
  }  /// <summary>
  /// 使用DES解密（Added by niehl 2005-4-6）
  /// </summary>
  /// <param name="encryptedValue">待解密的字符串</param>
  /// <param name="key">密钥(最大长度8)</param>
  /// <param name="IV">m初始化向量(最大长度8)</param>
  /// <returns>解密后的字符串</returns>
  public string DESDecrypt(string encryptedValue,string key,string IV)
  {
   //将key和IV处理成8个字符
   key += "12345678";
   IV += "12345678";
   key = key.Substring(0,8);
   IV = IV.Substring(0,8);   SymmetricAlgorithm sa;
   ICryptoTransform ct;
   MemoryStream ms;
   CryptoStream cs;
   byte[] byt;   sa = new DESCryptoServiceProvider();
   sa.Key = Encoding.UTF8.GetBytes(key);
   sa.IV = Encoding.UTF8.GetBytes(IV);
   ct = sa.CreateDecryptor();   byt = Convert.FromBase64String(encryptedValue);   ms = new MemoryStream();
   cs = new CryptoStream(ms, ct,
CryptoStreamMode.Write);
   cs.Write(byt, 0, byt.Length);
   cs.FlushFinalBlock();   cs.Close();   return Encoding.UTF8.GetString(ms.ToArray());  }  public string DESDecrypt(string encryptedValue,string key)
  {
   return DESDecrypt(encryptedValue,key,key);
  }  private string GetStringValue(byte[] Byte)
  {
   string tmpString = "";   if (this.isReturnNum == false)
   {
    ASCIIEncoding Asc = new ASCIIEncoding();
    tmpString = Asc.GetString(Byte);
   }
   else
   {
    int iCounter;    for
(iCounter=0;iCounter<Byte.Length;iCounter++)
    {
     tmpString = tmpString +
Byte[iCounter].ToString();
    }

   }

   return tmpString;
  }  private byte[] GetKeyByteArray(string strKey)
  {   ASCIIEncoding Asc = new ASCIIEncoding();

   int tmpStrLen = strKey.Length;
   byte[] tmpByte = new byte[tmpStrLen-1];   tmpByte = Asc.GetBytes(strKey);   return tmpByte;  } }
}

using System;namespace EncryptMD5
{
public class MD5
{
public MD5()
{
//
// TODO: 在此处添加构造函数逻辑
//

}
#region MD5
private const int BITS_TO_A_BYTE = 8;
private const int BYTES_TO_A_WORD = 4;
private const int BITS_TO_A_WORD = 32; private static long[] m_lOnBits = new long[30 + 1];
private static long[] m_l2Power = new long[30 + 1]; private static long LShift(long lValue, long iShiftBits)
{
long LShift = 0;
if (iShiftBits == 0)
{
LShift = lValue;
return LShift;
}
else
{
if( iShiftBits == 31)
{
if (Convert.ToBoolean(lValue & 1))
{
LShift = 0x80000000;
}
else
{
LShift = 0;
}
return LShift;
}
else
{
if( iShiftBits < 0 || iShiftBits > 31)
{
// Err.Raise 6;
}
}
} if (Convert.ToBoolean((lValue & m_l2Power[31 - iShiftBits])))
{
LShift = ((lValue & m_lOnBits[31 - (iShiftBits + 1)]) * m_l2Power[iShiftBits]) | 0x80000000;
}
else
{
LShift = ((lValue & m_lOnBits[31 - iShiftBits]) * m_l2Power[iShiftBits]);
} return LShift;
} private static long RShift(long lValue, long iShiftBits)
{
long RShift = 0;
if (iShiftBits == 0)
{
RShift = lValue;
return RShift;
}
else
{
if( iShiftBits == 31)
{
if (Convert.ToBoolean(lValue & 0x80000000))
{
RShift = 1;
}
else
{
RShift = 0;
}
return RShift;
}
else
{
if( iShiftBits < 0 || iShiftBits > 31)
{
// Err.Raise 6;
}
}
} RShift = (lValue & 0x7FFFFFFE) / m_l2Power[iShiftBits]; if (Convert.ToBoolean((lValue & 0x80000000)))
{
RShift = (RShift | (0x40000000 / m_l2Power[iShiftBits - 1]));
} return RShift;
} private static long RotateLeft(long lValue, long iShiftBits)
{
long RotateLeft = 0;
RotateLeft = LShift(lValue, iShiftBits) | RShift(lValue, (32 - iShiftBits));
return RotateLeft;
} private static long AddUnsigned(long lX, long lY)
{
long AddUnsigned = 0;
long lX4 = 0;
long lY4 = 0;
long lX8 = 0;
long lY8 = 0;
long lResult = 0; lX8 = lX & 0x80000000;
lY8 = lY & 0x80000000;
lX4 = lX & 0x40000000;
lY4 = lY & 0x40000000; lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
if (Convert.ToBoolean(lX4 & lY4))
{
lResult = lResult ^ 0x80000000 ^ lX8 ^ lY8;
}
else if( Convert.ToBoolean(lX4 | lY4))
{
if (Convert.ToBoolean(lResult & 0x40000000))
{
lResult = lResult ^ 0xC0000000 ^ lX8 ^ lY8;
}
else
{
lResult = lResult ^ 0x40000000 ^ lX8 ^ lY8;
}
}
else
{
lResult = lResult ^ lX8 ^ lY8;
}
AddUnsigned = lResult;
return AddUnsigned;
} private static long md5_F(long x, long y, long z)
{
long md5_F = 0;
md5_F = (x & y) | (( ~x) & z);
return md5_F;
} private static long md5_G(long x, long y, long z)
{
long md5_G = 0;
md5_G = (x & z) | (y & ( ~z));
return md5_G;
} private static long md5_H(long x, long y, long z)
{
long md5_H = 0;
md5_H = (x ^ y ^ z);
return md5_H;
} private static long md5_I(long x, long y, long z)
{
long md5_I = 0;
md5_I = (y ^ (x | (~z)));
return md5_I;
} private static void md5_FF(ref long a, long b, long c, long d, long x, long s, long ac)
{
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac));
a = RotateLeft(a, s);
a = AddUnsigned(a, b);
} private static void md5_GG(ref long a, long b, long c, long d, long x, long s, long ac)
{
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac));
a = RotateLeft(a, s);
a = AddUnsigned(a, b);
} private static void md5_HH(ref long a, long b, long c, long d, long x, long s, long ac)
{
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac));
a = RotateLeft(a, s);
a = AddUnsigned(a, b);
} private static void md5_II(ref long a, long b, long c, long d, long x, long s, long ac)
{
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac));
a = RotateLeft(a, s);
a = AddUnsigned(a, b);
}

private static long[] ConvertToWordArray(string sMessage)
{
long[] ConvertToWordArray = null;
int lMessageLength = 0;
int lNumberOfWords = 0;
long[] lWordArray = null;
int lBytePosition = 0;
int lByteCount = 0;
int lWordCount = 0; const int MODULUS_BITS = 512;
const int CONGRUENT_BITS = 448; lMessageLength = sMessage.Length;
lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) / BITS_TO_A_BYTE)) / (MODULUS_BITS / BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS / BITS_TO_A_WORD);
lWordArray = new long[lNumberOfWords]; lBytePosition = 0;
lByteCount = 0; while(lByteCount < lMessageLength)
{
lWordCount = lByteCount / BYTES_TO_A_WORD;
lBytePosition = (lByteCount % BYTES_TO_A_WORD) * BITS_TO_A_BYTE;
lWordArray[lWordCount] = lWordArray[lWordCount] | LShift(Convert.ToByte(sMessage.Substring(lByteCount, 1).ToCharArray()[0]), lBytePosition);
lByteCount = lByteCount + 1;
} lWordCount = lByteCount / BYTES_TO_A_WORD;
lBytePosition = (lByteCount % BYTES_TO_A_WORD) * BITS_TO_A_BYTE;
lWordArray[lWordCount] = lWordArray[lWordCount] | LShift(0x80, lBytePosition);
lWordArray[lNumberOfWords - 2] = LShift(lMessageLength, 3);
lWordArray[lNumberOfWords - 1] = RShift(lMessageLength, 29);
ConvertToWordArray = lWordArray; return ConvertToWordArray;
} private static string WordToHex(long lValue)
{
string WordToHex = "";
long lByte = 0;
int lCount = 0;
for(lCount = 0; lCount <= 3; lCount++)
{
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) & m_lOnBits[BITS_TO_A_BYTE - 1];
WordToHex = WordToHex + (("0" + ToHex(lByte)).Substring(("0" + ToHex(lByte)).Length - 2));
}
return WordToHex;
} public static string ToMD5(string sMessage)
{
string MD5 = "";
int stype = 32;

for(int i=0; i<=30; i++)
{
m_lOnBits[i] = Convert.ToInt64(Math.Pow(2, i+1) -1);
m_l2Power[i] = Convert.ToInt64(Math.Pow(2, i));
} long[] x = null;
int k = 0;
long AA = 0;
long BB = 0;
long CC = 0;
long DD = 0;
long a = 0;
long b = 0;
long c = 0;
long d = 0; const int S11 = 7;
const int S12 = 12;
const int S13 = 17;
const int S14 = 22;
const int S21 = 5;
const int S22 = 9;
const int S23 = 14;
const int S24 = 20;
const int S31 = 4;
const int S32 = 11;
const int S33 = 16;
const int S34 = 23;
const int S41 = 6;
const int S42 = 10;
const int S43 = 15;
const int S44 = 21; x = ConvertToWordArray(sMessage); a = 0x67452301;
b = 0xEFCDAB89;
c = 0x98BADCFE;
d = 0x10325476; for(k = 0; k < x.Length; k += 16)
{
AA = a;
BB = b;
CC = c;
DD = d; md5_FF(ref a, b, c, d, x[k + 0], S11, 0xD76AA478);
md5_FF(ref d, a, b, c, x[k + 1], S12, 0xE8C7B756);
md5_FF(ref c, d, a, b, x[k + 2], S13, 0x242070DB);
md5_FF(ref b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
md5_FF(ref a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
md5_FF(ref d, a, b, c, x[k + 5], S12, 0x4787C62A);
md5_FF(ref c, d, a, b, x[k + 6], S13, 0xA8304613);
md5_FF(ref b, c, d, a, x[k + 7], S14, 0xFD469501);
md5_FF(ref a, b, c, d, x[k + 8], S11, 0x698098D8);
md5_FF(ref d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
md5_FF(ref c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
md5_FF(ref b, c, d, a, x[k + 11], S14, 0x895CD7BE);
md5_FF(ref a, b, c, d, x[k + 12], S11, 0x6B901122);
md5_FF(ref d, a, b, c, x[k + 13], S12, 0xFD987193);
md5_FF(ref c, d, a, b, x[k + 14], S13, 0xA679438E);
md5_FF(ref b, c, d, a, x[k + 15], S14, 0x49B40821);
md5_GG(ref a, b, c, d, x[k + 1], S21, 0xF61E2562);
md5_GG(ref d, a, b, c, x[k + 6], S22, 0xC040B340);
md5_GG(ref c, d, a, b, x[k + 11], S23, 0x265E5A51);
md5_GG(ref b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
md5_GG(ref a, b, c, d, x[k + 5], S21, 0xD62F105D);
md5_GG(ref d, a, b, c, x[k + 10], S22, 0x2441453);
md5_GG(ref c, d, a, b, x[k + 15], S23, 0xD8A1E681);
md5_GG(ref b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
md5_GG(ref a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
md5_GG(ref d, a, b, c, x[k + 14], S22, 0xC33707D6);
md5_GG(ref c, d, a, b, x[k + 3], S23, 0xF4D50D87);
md5_GG(ref b, c, d, a, x[k + 8], S24, 0x455A14ED);
md5_GG(ref a, b, c, d, x[k + 13], S21, 0xA9E3E905);
md5_GG(ref d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
md5_GG(ref c, d, a, b, x[k + 7], S23, 0x676F02D9);
md5_GG(ref b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
md5_HH(ref a, b, c, d, x[k + 5], S31, 0xFFFA3942);
md5_HH(ref d, a, b, c, x[k + 8], S32, 0x8771F681);
md5_HH(ref c, d, a, b, x[k + 11], S33, 0x6D9D6122);
md5_HH(ref b, c, d, a, x[k + 14], S34, 0xFDE5380C);
md5_HH(ref a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
md5_HH(ref d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
md5_HH(ref c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
md5_HH(ref b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
md5_HH(ref a, b, c, d, x[k + 13], S31, 0x289B7EC6);
md5_HH(ref d, a, b, c, x[k + 0], S32, 0xEAA127FA);
md5_HH(ref c, d, a, b, x[k + 3], S33, 0xD4EF3085);
md5_HH(ref b, c, d, a, x[k + 6], S34, 0x4881D05);
md5_HH(ref a, b, c, d, x[k + 9], S31, 0xD9D4D039);
md5_HH(ref d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
md5_HH(ref c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
md5_HH(ref b, c, d, a, x[k + 2], S34, 0xC4AC5665);
md5_II(ref a, b, c, d, x[k + 0], S41, 0xF4292244);
md5_II(ref d, a, b, c, x[k + 7], S42, 0x432AFF97);
md5_II(ref c, d, a, b, x[k + 14], S43, 0xAB9423A7);
md5_II(ref b, c, d, a, x[k + 5], S44, 0xFC93A039);
md5_II(ref a, b, c, d, x[k + 12], S41, 0x655B59C3);
md5_II(ref d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
md5_II(ref c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
md5_II(ref b, c, d, a, x[k + 1], S44, 0x85845DD1);
md5_II(ref a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
md5_II(ref d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
md5_II(ref c, d, a, b, x[k + 6], S43, 0xA3014314);
md5_II(ref b, c, d, a, x[k + 13], S44, 0x4E0811A1);
md5_II(ref a, b, c, d, x[k + 4], S41, 0xF7537E82);
md5_II(ref d, a, b, c, x[k + 11], S42, 0xBD3AF235);
md5_II(ref c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
md5_II(ref b, c, d, a, x[k + 9], S44, 0xEB86D391); a = AddUnsigned(a, AA);
b = AddUnsigned(b, BB);
c = AddUnsigned(c, CC);
d = AddUnsigned(d, DD);
} if (stype == 32)
{
MD5 = ((((WordToHex(a)) + (WordToHex(b))) + (WordToHex(c))) + (WordToHex(d))).ToLower();
}
else
{
MD5 = ((WordToHex(b)) + (WordToHex(c))).ToLower();
}
return MD5;
}

private static string ToHex(long dec)
{
string strhex = "";
while(dec > 0)
{
strhex = tohex(dec % 16) + strhex;
dec = dec / 16;
}
return strhex;
}

private static string tohex(long hex)
{
string strhex = "";
switch(hex)
{
case 10: strhex = "a"; break;
case 11: strhex = "b"; break;
case 12: strhex = "c"; break;
case 13: strhex = "d"; break;
case 14: strhex = "e"; break;
case 15: strhex = "f"; break;
default : strhex = hex.ToString(); break;
}
return strhex;
}
#endregion
}
}

System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile

这是我在项目中写的MD5加密算法实现，你参考一下：
/*************************************************************************
* Copyright(C) 2004-2005
************************************************************************/using System;
using System.Text;
using System.IO;
using System.Security.Cryptography;namespace CryptionDataMD5
{
/// <summary>
/// Make message digest based on MD5 for byte array and string
/// </summary>
/// <Author>Yao</Author>
/// <Date>2005/06/13</Date>
public class CryptionDataMD5
{
/// <summary>
/// Make message digest based on MD5 for byte array
/// </summary>
/// <param name="origin">source byte array</param>
/// <returns>message digest</returns>
public static string EncryptionByteData(byte[] SourceData)
{
try
{
//create a stream object
MemoryStream stream = new MemoryStream(SourceData);//define hex table
const string HEX_TABLE = "0123456789abcdef";//create a MD5CryptoServiceProvider object
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
//Calculate MD5 Checksum
byte[] hashData = md5.ComputeHash(stream);//convert to string
StringBuilder sb=new StringBuilder();
sb.Length =hashData.Length *2;//make string sb
for(int i=0;i<hashData.Length ;i++)
{
sb[i*2]=HEX_TABLE[hashData[i]>>4];
sb[i*2+1]=HEX_TABLE[hashData[i] & 0xF];
}return sb.ToString();
}
catch (Exception ex)
{
throw ex;
}
}/// <summary>
/// /// Make message digest based on MD5 for string
/// </summary>
/// <param name="origin">source string</param>
/// <returns>message digest</returns>
public static string EncryptionStringData(string SourceData)
{
string messageDigest = string.Empty;
try
{
byte[] sorData = Encoding.Default.GetBytes(SourceData);
messageDigest = EncryptionByteData(sorData);
}
catch(Exception ex)
{
throw ex;
}
return messageDigest;
}
}
}

调试易

想做个MD5的加密,如何写代码?

解决方案 »