you look:
http://www.codeproject.com/csharp/cryptography.asp
and:
http://www.codeproject.com/csharp/sharpprivacy.asp
http://www.codeproject.com/csharp/cryptography.asp
and:
http://www.codeproject.com/csharp/sharpprivacy.asp
这一点很难.需要做base64才行.否则会出错的.
加密后的密文一般都是二进制的.
若你需要,我有rc4的算法.很方法
byte[] rc4(byte[] source,byte[] key)这样调的.很容易.
System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile("xxx","MD5");
能不能返回字符串没关系,返回二进制的数值也可以~~~
能用WriteLine方法显示就行。
/// 对密码进行加密
/// </summary>
/// <param name="password">密码</param>
/// <returns>已加密密码</returns>
public static string EncryptPassword(string password)
{
//UnicodeEncoding encoding = new UnicodeEncoding();
byte[] hashBytes = Encoding.Default.GetBytes( password ); // compute MD5 hash.
MD5 md5 = new MD5CryptoServiceProvider();
byte[] cryptPassword = md5.ComputeHash ( hashBytes );
int len;
string temp=String.Empty; len=cryptPassword.Length;
for(int i=0;i<len;i++)
{
temp +=cryptPassword[i].ToString("X2");
}
return temp;
}
using System.Security.Cryptography;
using System.IO;
using System.Text;
//方法
//加密方法
public string Encrypt(string pToEncrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//把字符串放到byte数组中
//原来使用的UTF8编码,我改成Unicode编码了,不行
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
//byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);
//建立加密对象的密钥和偏移量
//原文使用ASCIIEncoding.ASCII方法的GetBytes方法
//使得输入密码必须输入英文文本
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(),CryptoStreamMode.Write);
//Write the byte array into the crypto stream
//(It will end up in the memory stream)
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the data back from the memory stream, and into a string
StringBuilder ret = new StringBuilder();
foreach(byte b in ms.ToArray())
{
//Format as hex
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
//解密方法
public string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
//Put the input string into the byte array
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for(int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
//建立加密对象的密钥和偏移量,此值重要,不能修改
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(),CryptoStreamMode.Write);
//Flush the data through the crypto stream into the memory stream
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//Get the decrypted data back from the memory stream
//建立StringBuild对象,CreateDecrypt使用的是流对象,必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
//-------代码完毕--------------------
注意:sKey输入密码的时候,必须使用英文字符,区分大小写,且字符数量是8个,不能多也不能少,否则出错。
byte[] bt = Encoding.Unicode.GetBytes(str);
MemoryStream ms = new MemoryStream(bt);//存储加密前的数据
CryptoStream cs = new CryptoStream(ms,desc.CreateEncryptor(key, iv),CryptoStreamMode.Read);MemoryStream ms2 = new MemoryStream();//存储加密后的数据
byte[] res = new byte[1024];
int len = cs.Read(res, 0, 1024);
while (len > 0) {
ms2.Write(res,0,len);
len = cs.Read(res, 0, 1024);
}
cs.Close();
ms2.Position = 0;//定位到最开始;
return ms2;
}
DESCryptoServiceProvider desc = new DESCryptoServiceProvider();