c#实现des加密中,对于解密还是有问题,请教下谁能帮我解决这个问题或者谁能帮我改动下,不甚感激。
using System;
using System.IO;
using System.Data;
using System.Text;
using System.Diagnostics;
using System.Security;
using System.Security.Cryptography;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;
}
}
class Program
{
static void Main(string[] args)
{
Des des1 = new Des();
Console.WriteLine("请输入字符串:");
string str = Console.ReadLine();
Console.WriteLine("加密后:");
Console.WriteLine(des1.Encrypt(str, "12345678"));
Console.WriteLine("解密后:");
Console.WriteLine(des1.Decrypt(str, "12345678"));
Console.Read();
}
}
}
using System;
using System.IO;
using System.Data;
using System.Text;
using System.Diagnostics;
using System.Security;
using System.Security.Cryptography;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;
}
}
class Program
{
static void Main(string[] args)
{
Des des1 = new Des();
Console.WriteLine("请输入字符串:");
string str = Console.ReadLine();
Console.WriteLine("加密后:");
Console.WriteLine(des1.Encrypt(str, "12345678"));
Console.WriteLine("解密后:");
Console.WriteLine(des1.Decrypt(str, "12345678"));
Console.Read();
}
}
}
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