public string EncryptPassword(string PasswordString,string PasswordFormat )
{
string encryptPassword = null;
if (PasswordFormat="SHA1"){
encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
}
elseif (PasswordFormat="MD5")
{ encryptPassword=FormsAuthortication.HashPasswordForStoringInConfigFile(PasswordString
}
return encryptPassword ;
}
{
string encode(string str);
string decode(string str);
}
{
public string encode(string str)
{
string htext = "";
{
htext = htext + (char) (str[i] + 10 - 1 * 2);
}
return htext;
}
{
string dtext = "";
{
dtext = dtext + (char) (str[i] - 10 + 1*2);
}
return dtext;
}
public string Encode(string data)
{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
int i = cryptoProvider.KeySize;
MemoryStream ms = new MemoryStream();
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey,
sw.Write(data);
sw.Flush();
cst.FlushFinalBlock();
sw.Flush();
return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
{
byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
try
{
byEnc = Convert.FromBase64String(data);
}
catch
{
return null;
}
MemoryStream ms = new MemoryStream(byEnc);
CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey,
StreamReader sr = new StreamReader(cst);
return sr.ReadToEnd();
}
{
/// 與ASP兼容的MD5加密算法
/// </summary>
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)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
string t2 =
t2 = t2.Replace("-", "");
return t2;
}
private static void EncryptData(String inName, String outName, byte[] desKey, byte[]
{
//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);
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.
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV),
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
fout.Close();
fin.Close();
}
private static void DecryptData(String inName, String outName, byte[] desKey, byte[]
{
//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);
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.
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV),
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
fout.Close();
fin.Close();
}
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.IO;
{
public class Security
{
public Security()
{
}
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">加密密鑰,要求爲8位</param>
/// <returns>加密成功返回加密後的字符串,失敗返回源串</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,
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密鑰,要求爲8位,和加密密鑰相同</param>
/// <returns>解密成功返回解密後的字符串,失敗返源串</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,
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
}
}
本文來自CSDN博客,轉載請標明出處:http://blog.csdn.net/leehom_zlj/archive/2008/12/21/3575726.aspx