最近在学习用C#实现DES加解密,下边是从网上看到的一个示范类。
先开始在一个控制台程序中实验时,效果很好。但后来我把它放到一个以前编的socket通信的WINDOWS应用程序中用时就出了问题,加密后的字串传到另一端时无法解密,用红色标出的地方过不去,大家帮我看看是怎么回事啊 class Des
{
//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
if (sKey.Length != 8) return ("wrong key"); 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
try
{
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
//inputByteArray = Convert.FromBase64String(pToDecrypt); 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);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray()); }
catch (Exception ef)
{
return ef.Message;
}
}
}
先开始在一个控制台程序中实验时,效果很好。但后来我把它放到一个以前编的socket通信的WINDOWS应用程序中用时就出了问题,加密后的字串传到另一端时无法解密,用红色标出的地方过不去,大家帮我看看是怎么回事啊 class Des
{
//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
if (sKey.Length != 8) return ("wrong key"); 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
try
{
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
//inputByteArray = Convert.FromBase64String(pToDecrypt); 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);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray()); }
catch (Exception ef)
{
return ef.Message;
}
}
}
一端发了消息之后,接收端运行到这一句会报错
而在控制台程序下就完全没问题
谢谢大家了
那个再小小的问下怎么给分