un link interessante per cryptare e decriptare file rar in c#!!!
http://www.fluxbytes.com/csharp/encrypt-and-decrypt-files-in-c/
Riporto il codice qualora la pagina linkata dovesse essere dismessa.
CRYPT
private static void EncryptFile(string inputFile, string outputFile, string skey)
{
try
{
using (RijndaelManaged aes = new RijndaelManaged())
{
byte[] key = ASCIIEncoding.UTF8.GetBytes(skey);
/* This is for demostrating purposes only.
* Ideally you will want the IV key to be different from your key and you should always generate a new one for each encryption in other to achieve maximum security*/
byte[] IV = ASCIIEncoding.UTF8.GetBytes(skey);
using (FileStream fsCrypt = new FileStream(outputFile, FileMode.Create))
{
using (ICryptoTransform encryptor = aes.CreateEncryptor(key, IV))
{
using (CryptoStream cs = new CryptoStream(fsCrypt, encryptor, CryptoStreamMode.Write))
{
using (FileStream fsIn = new FileStream(inputFile, FileMode.Open))
{
int data;
while ((data = fsIn.ReadByte()) != -1)
{
cs.WriteByte((byte)data);
}
}
}
}
}
}
}
catch (Exception ex)
{
// failed to encrypt file
}
}
private static void DecryptFile(string inputFile, string outputFile, string skey)
{
try
{
using (RijndaelManaged aes = new RijndaelManaged())
{
byte[] key = ASCIIEncoding.UTF8.GetBytes(skey);
/* This is for demostrating purposes only.
* Ideally you will want the IV key to be different from your key and you should always generate a new one for each encryption in other to achieve maximum security*/
byte[] IV = ASCIIEncoding.UTF8.GetBytes(skey);
using (FileStream fsCrypt = new FileStream(inputFile, FileMode.Open))
{
using (FileStream fsOut = new FileStream(outputFile, FileMode.Create))
{
using (ICryptoTransform decryptor = aes.CreateDecryptor(key, IV))
{
using (CryptoStream cs = new CryptoStream(fsCrypt, decryptor, CryptoStreamMode.Read))
{
int data;
while ((data = cs.ReadByte()) != -1)
{
fsOut.WriteByte((byte)data);
}
}
}
}
}
}
}
catch (Exception ex)
{
// failed to decrypt file
}
}
Usage
File Input File Output Key
EncryptFile("C:\\myfile.rar", "c:\\myfileEncrypted.rar", "1234512345678976");
DecryptFile("C:\\myfileEncrypted.rar", "c:\\myfileDecrypted.rar", "1234512345678976");
Ciao e alla prossima!!!
