实在搞不定了，加密解密的函数，英文可以，中文不行，请高手看看是哪里编码错误！

Question

我看了一下，主要是这个：
StringBuilder ret = new StringBuilder();
foreach(byte b in ms.ToArray())
   {
ret.Append((char)b);
   }
建立字符串，但是没有解码，如果有Encoding.GetDecoder方法，就可以把字节解码为字符，而且可以加上参数gb2312,就可以得出中文了，不过怎么用？

Answer 1

using System;
using System.Security.Cryptography;
using System.IO;
namespace HenryFan.Library
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class HenryFanCipher
{
private static byte[] PublicKey = {214,46,220,83,160,73,40,39,201,155,19,202,3,11,191,178,56,
   74,90,36,248,103,18,144,170,163,145,87,54,61,34,220,222,
   207,137,149,173,14,92,120,206,222,158,28,40,24,30,16,175,
   108,128,35,230,118,40,121,113,125,216,130,11,24,90,48,194,
   240,105,44,76,34,57,249,228,125,80,38,9,136,29,117,207,139,
   168,181,85,137,126,10,126,242,120,247,121,8,100,12,201,171,
   38,226,193,180,190,117,177,87,143,242,213,11,44,180,113,93,
   106,99,179,68,175,211,164,116,64,148,226,254,172,147};
private byte[] Exponent;
public HenryFanCipher()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public byte[] PExponent
{
set
{
Exponent=value;
}
get
{
return Exponent;
}
}
public string WriteCipher(string cipher)
{
byte[] EncryptedSymmetricKey;
byte[] EncryptedSymmetricIV;
RijndaelManaged RM = new RijndaelManaged();
EncryptedSymmetricKey = (new MD5CryptoServiceProvider()).ComputeHash(PublicKey);
EncryptedSymmetricIV =(new MD5CryptoServiceProvider()).ComputeHash(Exponent);
System.IO.MemoryStream stream=new MemoryStream();
StreamWriter SWriter = new StreamWriter(stream);
SWriter.Write(cipher);
SWriter.Flush();
stream.Position=0;
CryptoStream CryptStream = new CryptoStream(stream, 
RM.CreateEncryptor(EncryptedSymmetricKey, EncryptedSymmetricIV),   
CryptoStreamMode.Read);
byte[] b=new byte[1000] ;
MemoryStream m=new MemoryStream();
int readLength=0;
while ((readLength=CryptStream.Read(b,0,1000))>0)
{
m.Write(b,0,readLength);
readLength=0;
}
byte[] mb=new byte[m.Length];
m.Position=0;
m.Read(mb,0,mb.Length);
m.Close();
CryptStream.Close();
stream.Close();
return System.Text.Encoding.Unicode.GetString(mb);

}
public string ReaderCipher(string Cipher)
{
byte[] EncryptedSymmetricKey;
byte[] EncryptedSymmetricIV;
RijndaelManaged RM = new RijndaelManaged();
EncryptedSymmetricKey = (new MD5CryptoServiceProvider()).ComputeHash(PublicKey);
EncryptedSymmetricIV =(new MD5CryptoServiceProvider()).ComputeHash(Exponent);
MemoryStream stream=new MemoryStream();
byte[] mb=System.Text.Encoding.Unicode.GetBytes(Cipher);
stream.Write(mb,0,mb.Length);
stream.Position=0;
CryptoStream CryptStream = new CryptoStream(stream, 
RM.CreateDecryptor(EncryptedSymmetricKey, EncryptedSymmetricIV),   
CryptoStreamMode.Read);
StreamReader SReader = new StreamReader(CryptStream);
string readerPass=SReader.ReadToEnd();
SReader.Close();
CryptStream.Close();
stream.Close();
return readerPass; }
public string WritePassWord(string PassWord)
{
System.IO.MemoryStream stream=new System.IO.MemoryStream();
RijndaelManaged RMCrypto = new RijndaelManaged();
byte[] Key = {0x01, 0x01, 0x03, 0x04, 0x05, 0x06, 0x06, 0x08, 0x09, 0x10, 0x10, 0x12, 0x13, 0x14, 0x15, 0x16};
byte[] IV = {0x01, 0x01, 0x03, 0x04, 0x05, 0x06, 0x06, 0x08, 0x09, 0x10, 0x10, 0x12, 0x13, 0x14, 0x15, 0x16};
StreamWriter SWriter = new StreamWriter(stream);
SWriter.Write(PassWord);
SWriter.Flush();
stream.Position=0;
CryptoStream CryptStream = new CryptoStream(stream, 
RMCrypto.CreateEncryptor(Key, IV),   
CryptoStreamMode.Read);
byte[] b=new byte[100] ;
MemoryStream m=new MemoryStream();
int readLength=0;
while ((readLength=CryptStream.Read(b,0,100))>0)
{
m.Write(b,0,readLength);
readLength=0;
}
byte[] mb=new byte[m.Length];
m.Position=0;
m.Read(mb,0,mb.Length);
string WritePass=System.Text.Encoding.Unicode.GetString(mb,0,mb.Length);
stream.Close();
CryptStream.Close();
return WritePass;
}
public string ReaderPassWord(string PassWord)
{

System.IO.MemoryStream stream=new System.IO.MemoryStream();
RijndaelManaged RMCrypto = new RijndaelManaged();
byte[] Key = {0x01, 0x01, 0x03, 0x04, 0x05, 0x06, 0x06, 0x08, 0x09, 0x10, 0x10, 0x12, 0x13, 0x14, 0x15, 0x16};
byte[] IV = {0x01, 0x01, 0x03, 0x04, 0x05, 0x06, 0x06, 0x08, 0x09, 0x10, 0x10, 0x12, 0x13, 0x14, 0x15, 0x16};
byte[] mb=System.Text.Encoding.Unicode.GetBytes(PassWord);
stream.Write(mb,0,mb.Length);
stream.Position=0;
CryptoStream CryptStream = new CryptoStream(stream, 
RMCrypto.CreateDecryptor(Key, IV),   
CryptoStreamMode.Read);
StreamReader SReader = new StreamReader(CryptStream);
string readerPass=SReader.ReadToEnd();
stream.Close();
CryptStream.Close();
return readerPass; } }
}
以上是我做的事例,对中文加密解密成功

Answer 2

ReaderCipher同WriteCipher方法;
使用前设PExponent是一个BYTE[]

Answer 3

我已经改写成功: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();
}
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());
}

Answer 4

谢谢啦，TheAres(班门斧)：
原来还是编码的问题，我还以为是算法错了呢~~
谢谢~~~
给分！

Answer 5

我这里是这么写的.通过了中文的测试.一切OKEncrypt.csusing System;
using System.Security.Cryptography;
using System.IO;public class Encrypt{
public static void Main(String[] args) {
byte[] deskey = {198,125,20,111,77,71,228,9};
byte[] desiv = {223,20,19,27,226,119,149,85};
EncryptData("./jm.txt","./jm.des",deskey,desiv);
}
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) {    
//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); //Create variables to help with read and write.
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. DES des = new DESCryptoServiceProvider();          
CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write);

Console.WriteLine("Encrypting..."); //Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
 len = fin.Read(bin, 0, 100);
 encStream.Write(bin, 0, len);
 rdlen = rdlen + len;
 Console.WriteLine("{0} bytes processed", rdlen);
} encStream.Close();  
fout.Close();
fin.Close();  
}
}Decrypt.csusing System;
using System.Security.Cryptography;
using System.IO;public class Decrypt{
public static void Main(String[] args) {
byte[] deskey = {198,125,20,111,77,71,228,9};
byte[] desiv = {223,20,19,27,226,119,149,85};
EncryptData("./jm.des","./jm1.txt",deskey,desiv);
}
private static void EncryptData(String inName, String outName, byte[] desKey, byte[] desIV) {    
//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); //Create variables to help with read and write.
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. DES des = new DESCryptoServiceProvider();          
CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write);

Console.WriteLine("Encrypting..."); //Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
 len = fin.Read(bin, 0, 100);
 encStream.Write(bin, 0, len);
 rdlen = rdlen + len;
 Console.WriteLine("{0} bytes processed", rdlen);
} encStream.Close();  
fout.Close();
fin.Close();  
}
}你可以在jm.txt写入中英文.jm.des是加密文件.jm1.txt是解密后的结果.你可以与jm.txt比较下.

Answer 6

在WEB中调试出现：怎么办
Specified key is not a valid size for this algorithm.