Zi 字媒體
2017-07-25T20:27:27+00:00
C# AES 256 檔案加解密 範例
資料來源: https://github.com/mullak99/SecureAES
完整程式專案(VS2010)下載:https://github.com/jash-git/CS_AES_256_Files
主程式:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace CS_AES_Files
{
class Program
{
static void Pause()
{
Console.Write(“Press any key to continue . . . “);
Console.ReadKey(true);
}
static void Main(string[] args)
{
String inputFile;
String outputFile;
String outputFile1;
String password;
inputFile = “test.png”;// “Program.cs”;
outputFile = “test_e.png”;//”Program_e.cs”;
outputFile1 = “test_d.png”;//”Program_d.cs”;
password = “P@$$WORD”;
SecureAES aes = new SecureAES();
aes.AES_Encrypt(inputFile, password, outputFile);
aes.AES_Decrypt(outputFile, password, outputFile1);
Pause();
}
}
}
加解密類別:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
namespace CS_AES_Files
{
public class SecureAES
{
//https://github.com/mullak99/SecureAES
public SecureAES()
{
return;
}
public string CreateRandomPassword(int length)
{
const string valid = “abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=_+[]{}:;@’~#,/?`¬!$%^&*()”;
StringBuilder res = new StringBuilder();
Random rnd = new Random();
while (0 < length–)
{
res.Append(valid[rnd.Next(valid.Length)]);
}
return res.ToString();
}
public static byte[] GenerateRandomSalt()
{
byte[] data = new byte[32];
using (RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider())
{
for (int i = 0; i < 10; i++)
{
rng.GetBytes(data);
}
}
return data;
}
public void AES_Encrypt(string inputFile, string password, string outputName = null)
{
byte[] salt = GenerateRandomSalt();
if (outputName == null)
{
outputName = inputFile + “.encrypted”;
}
FileStream fsCrypt = new FileStream(outputName, FileMode.Create);
byte[] passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.BlockSize = 128;
AES.Padding = PaddingMode.PKCS7;
var key = new Rfc2898DeriveBytes(passwordBytes, salt, 50000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Mode = CipherMode.CFB;
fsCrypt.Write(salt, 0, salt.Length);
CryptoStream cs = new CryptoStream(fsCrypt, AES.CreateEncryptor(), CryptoStreamMode.Write);
FileStream fsIn = new FileStream(inputFile, FileMode.Open);
byte[] buffer = new byte[1048576];
int read;
try
{
while ((read = fsIn.Read(buffer, 0, buffer.Length)) > 0)
{
//Application.DoEvents();
cs.Write(buffer, 0, read);
}
fsIn.Close();
}
catch (Exception ex)
{
}
finally
{
cs.Close();
fsCrypt.Close();
}
}
public bool AES_Decrypt(string inputFile, string password, string outputName = null)
{
if (Path.GetExtension(inputFile) == “.encrypted” || !String.IsNullOrEmpty(outputName))
{
byte[] passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);
byte[] salt = new byte[32];
FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);
fsCrypt.Read(salt, 0, salt.Length);
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(passwordBytes, salt, 50000);
AES.Key = key.GetBytes(AES.KeySize / 8);
AES.IV = key.GetBytes(AES.BlockSize / 8);
AES.Padding = PaddingMode.PKCS7;
AES.Mode = CipherMode.CFB;
CryptoStream cs = new CryptoStream(fsCrypt, AES.CreateDecryptor(), CryptoStreamMode.Read);
if (outputName == null)
{
outputName = inputFile.Replace(“.encrypted”, “”);
}
FileStream fsOut = new FileStream(outputName, FileMode.Create);
int read;
byte[] buffer = new byte[1048576];
try
{
while ((read = cs.Read(buffer, 0, buffer.Length)) > 0)
{
//Application.DoEvents();
fsOut.Write(buffer, 0, read);
}
}
catch (System.Security.Cryptography.CryptographicException ex_CryptographicException)
{
}
catch (Exception ex)
{
}
try
{
cs.Close();
}
catch (Exception ex)
{
}
finally
{
fsOut.Close();
fsCrypt.Close();
}
return true;
}
else
{
return false;
}
}
}
}
寫了
5860316篇文章，獲得
23313次喜歡