I have a .jpg file of 10,174,706 bytes on the server and after i send it to the client i get 10,190,848 bytes as a multiple of 16 * 1024 (that what i used in CopyTo function for streams) which is more. No problem for a jpg file but i want to send a zip file or DLL file i think even 1 extra byte can corrupt the file. Are the extra bytes a problem for zip or DLL and exe files? And if they are a problem how to i fix this issue?
SERVER:
case "Requestx64File":
{
Console.WriteLine("Text is a x64file request");
using (var netStream = new NetworkStream(current))
{
using (var fileStream = File.OpenRead("plm.jpg"))
{
fileStream.CopyTo(netStream);
}
}
CopyTo Extension:
public static void CopyTo(this Stream input, Stream output)
{
byte[] buffer = new byte[16 * 1024];
int bytesRead;
while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0)
{
byte[] secret_buffer = CryptosystemChiper.EncryptToByteArray(buffer);
int size = secret_buffer.Length;
output.Write(secret_buffer, 0, size);
}
}
CLIENT:
else if (lastMessageReceived.IndexOf("IncomingPayloadInfo") > -1)
{
ResponseParser rp = new ResponseParser(lastMessageReceived);
using (NetworkStream netstream = new NetworkStream(ClientSocket))
{
using (var filestream = File.OpenWrite("plm.jpg"))
{
netstream.CopyTo(filestream);
}
}
}
CopyTo Extension
public static void CopyTo(this Stream input, Stream output)
{
byte[] buffer = new byte[16 * 1024];
int bytesRead;
while ((bytesRead = input.Read(buffer, 0, buffer.Length)) > 0)
{
byte[] clear_buffer = CryptosystemChiper.DecryptToByteArray(buffer);
int size = clear_buffer.Length;
output.Write(clear_buffer, 0, size);
}
return;
}
CryptosystemChiper for both CLIENT and SERVER:
public class CryptosystemChiper
{
static string EncryptionKey;
public static void setKey(string key)
{
EncryptionKey = key;
}
#region Crypto
//------------------------------------------------------------------------------------------------------------------------------------------------> Encryption/Decryption
public static string EncryptToString(string clearText)
{
try
{
// string EncryptionKey = "MAKV2SPBNI99212"; //Encryption key
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText); //Bytes of the message
using (Aes encryptor = Aes.Create()) //Create a new AES decryptor
{
encryptor.KeySize = 128;
encryptor.Padding = PaddingMode.Zeros;
//Encrypt the data
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = Convert.ToBase64String(ms.ToArray());
}
}
return clearText; //Return the encrypted text
}
catch (Exception) //Something went wrong
{
// ReportError(ErrorType.ENCRYPT_DATA_CORRUPTED, "Can't encrypt message!", "Message encryption failed!"); //Report error to server
return clearText; //Send the plain text data
}
}
/// <summary>
/// Decrypt encrypted data
/// </summary>
/// <param name="cipherText">The data to decrypt</param>
/// <returns>The plain text message</returns>
public static string DecryptToString(string cipherText)
{
try
{
//string EncryptionKey = "MAKV2SPBNI99212"; //this is the secret encryption key you want to hide dont show it to other guys
byte[] cipherBytes = Convert.FromBase64String(cipherText); //Get the encrypted message's bytes
using (Aes encryptor = Aes.Create()) //Create a new AES object
{
encryptor.KeySize = 128;
encryptor.Padding = PaddingMode.Zeros;
//Decrypt the text
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
return cipherText; //Return the plain text data
}
catch (Exception ex) //Something went wrong
{
Console.WriteLine(ex.Message);
Console.WriteLine("Cipher Text: " + cipherText);
return "error"; //Return error
}
}
public static byte[] EncryptToByteArray(byte[] clearBytes)
{
byte[] da = { 0 };
byte[] ecnryptedBytes;
try
{
// string EncryptionKey = "MAKV2SPBNI99212"; //Encryption key
// byte[] clearBytes = Encoding.Unicode.GetBytes(clearText); //Bytes of the message
using (Aes encryptor = Aes.Create()) //Create a new AES decryptor
{
encryptor.KeySize = 128;
encryptor.Padding = PaddingMode.Zeros;
//Encrypt the data
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
ecnryptedBytes = ms.ToArray();
}
}
return ecnryptedBytes; //Return the encrypted text
}
catch (Exception ex) //Something went wrong
{
ecnryptedBytes = null;
// ReportError(ErrorType.ENCRYPT_DATA_CORRUPTED, "Can't encrypt message!", "Message encryption failed!"); //Report error to server
return ecnryptedBytes; //Send the plain text data
}
}
/// <summary>
/// Decrypt encrypted data
/// </summary>
/// <param name="cipherBytes">The data to decrypt</param>
/// <returns>The plain text message</returns>
public static byte[] DecryptToByteArray(byte[] cipherBytes)
{
byte[] clearBytes;
try
{
//string EncryptionKey = "MAKV2SPBNI99212"; //this is the secret encryption key you want to hide dont show it to other guys
// byte[] cipherBytes = Convert.FromBase64String(cipherText); //Get the encrypted message's bytes
using (Aes encryptor = Aes.Create()) //Create a new AES object
{
encryptor.KeySize = 128;
encryptor.Padding = PaddingMode.Zeros;
//Decrypt the bytes
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
clearBytes = ms.ToArray();
}
}
return clearBytes; //Return the plain text data
}
catch (Exception ex) //Something went wrong
{
clearBytes = null;
Console.WriteLine(ex.Message);
Console.WriteLine("Cipher Text: " + clearBytes);
return clearBytes; //Return error
}
}
//------------------------------------------------------------------------------------------------------------------------------------------------> Encryption/Decryption
#endregion
}`enter code here`
