public static string Encrypt(string userData,byte[] key,byte[] iv)
{
byte[] uData=Encoding.Unicode.GetBytes(userData);
DESCryptoServiceProvider desc=new DESCryptoServiceProvider();
ICryptoTransform entrans=desc.CreateDecryptor(key,iv);
byte[] en = entrans.TransformFinalBlock(uData, 0, uData.Length);
string res = stem.Text.Encoding.UTF8.GetString(en,0,en.Length);
return res;
}
{
byte[] uData=Encoding.Unicode.GetBytes(userData);
DESCryptoServiceProvider desc=new DESCryptoServiceProvider();
ICryptoTransform entrans=desc.CreateDecryptor(key,iv);
byte[] en = entrans.TransformFinalBlock(uData, 0, uData.Length);
string res = stem.Text.Encoding.UTF8.GetString(en,0,en.Length);
return res;
}
//名称空间
using System;
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());
}
说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.ArgumentException: 指定键的大小对于此算法无效。源错误:
行 31: //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
行 32: //使得输入密码必须输入英文文本
行 33: des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^发生错误
行 34: des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
行 35: MemoryStream ms = new MemoryStream();
string key="43, 136, 76, 107, 172, 255, 227, 114";