/// <summary>
/// The command method to encrypt the given data
/// </summary>
private void Encrypt()
{
byte[] encrypted;
byte[] plainBytes;
//Encryption sequence differs according to the selected data format
switch (DataInput.DataFormatSelected)
{
//Encrypt file
case Format.File:
//Get plain file bytes
plainBytes = DataInput.GetBytesFromFile();
//Encrypt
encrypted = KeyPairSetup.Encrypt(plainBytes);
//Verify that the encryption is successfull
if (encrypted != null)
{
//Create encrypted file path
EncryptedFilePath = DataInput.GetEncryptedFilePath();
//Write the encrypted bytes to the new file path
File.WriteAllBytes(EncryptedFilePath, encrypted);
}
break;
//Encrypt text
case Format.Text:
//Encrypt
encrypted = KeyPairSetup.Encrypt(DataInput.Data);
//Verify that the encryption is successfull
if (encrypted != null)
{
//Comvert the encrypted bytes to hex string
EncryptedText = ByteConvert.BytesToHexString(encrypted);
}
break;
//Encrypt hex string
case Format.Hex:
//Convert hex string to plain bytes
plainBytes = ByteConvert.HexStringToBytes(DataInput.Data);
//Encrypt
encrypted = KeyPairSetup.Encrypt(plainBytes);
//Verify that the encryption is successfull
if (encrypted != null)
{
//Convert encrypted bytes to hex string
EncryptedText = ByteConvert.BytesToHexString(encrypted);
}
break;
}
}
/// <summary>
/// The command method to encrypt the given data
/// </summary>
private void Encrypt()
{
//Convert the string key and iv to bytes
var secretKey = ByteConvert.HexStringToBytes(SecretKey);
var iv = ByteConvert.HexStringToBytes(IV);
//fields for saving the plain and encrypted byte arrays
byte[] encrypted;
byte[] plainBytes;
//Get the data and encrypt it acording to the selected format
switch (DataInput.DataFormatSelected)
{
//Encrypt a text string
case Format.Text:
//Encrypt with the selected cipher and return the encrypted byte array
encrypted = SelectedCipherApi.EncryptText(SelectedAlgorithim, SelectedKeySize, secretKey, iv, DataInput.Data);
//Converts the byte array to a hex string
EncryptedText = ByteConvert.BytesToHexString(encrypted);
break;
//Encrypt a hex string
case Format.Hex:
//Convert the plain hex string to byte array
plainBytes = ByteConvert.HexStringToBytes(DataInput.Data);
//Encrypt with the selected cipher and return the encrypted byte array
encrypted = SelectedCipherApi.EncryptBytes(SelectedAlgorithim, SelectedKeySize, secretKey, iv, plainBytes);
//Converts the byte array to a hex string
EncryptedText = ByteConvert.BytesToHexString(encrypted);
break;
//Encrypt a file
case Format.File:
//Gets the file as a byte array
plainBytes = File.ReadAllBytes(DataInput.Data);
//Encrypt with the selected cipher and return the encrypted byte array
encrypted = SelectedCipherApi.EncryptBytes(SelectedAlgorithim, SelectedKeySize, secretKey, iv, plainBytes);
//Gets the file extension of the plain original file
var extension = Path.GetExtension(DataInput.Data);
//Adds the "Encrypted" text to the encrypted file name
EncryptedFilePath = Path.Combine(Directory.GetParent(DataInput.Data).ToString(), Path.GetFileNameWithoutExtension(DataInput.Data) + ".Encrypted" + extension);
//Writes all the bytes to the encrypted file
File.WriteAllBytes(EncryptedFilePath, encrypted);
break;
}
}
/// <summary>
/// Default constructor
/// </summary>
public KeyPairSetupDesignModel()
{
SelectedOperation = AsymmetricOperation.Encryption;
Algorithims = BaseMsdnAsymmetric.GetAlgorthims(SelectedOperation);
//Algorithims = IAsymmetricCipher.GetBouncyAlgorthims(SelectedOperation);
SelectedAlgorithimIndex = 0;
BaseMsdnAsymmetric.GetCipher(Algorithims[SelectedAlgorithimIndex]);
PrivateKey = ByteConvert.HexStringToBytes("FFFFFFFFF111000");
PublicKey = ByteConvert.HexStringToBytes("00000000FFFFFFF");
}
/// <summary>
/// The command method to decrypt the given data
/// </summary>
private void Decrypt()
{
byte[] encrypted;
byte[] decrypted;
//Decryption sequence differs according to the selected data format
switch (DataInput.DataFormatSelected)
{
//Decrypt file
case Format.File:
//Get the encrypted file bytes
encrypted = ByteConvert.FileToBytes(EncryptedFilePath);
//Decrypt
decrypted = KeyPairSetup.Decrypt(encrypted);
//true if decrypted not null
if (decrypted != null)
{
//Create an encrypted file path
DecryptedFilePath = DataInput.GetDecryptedFilePath(EncryptedFilePath);
//Write decrypted bytes to file
File.WriteAllBytes(DecryptedFilePath, decrypted);
}
break;
//Decrypt a text
case Format.Text:
//Convert the encrypted hex string to bytes
encrypted = ByteConvert.HexStringToBytes(EncryptedText);
//Decrypt as text
DecryptedText = KeyPairSetup.DecryptToText(encrypted);
break;
//Decrypt a hex value
case Format.Hex:
//Convert the encrypted hex string to bytes
encrypted = ByteConvert.HexStringToBytes(EncryptedText);
//Decrypt
decrypted = KeyPairSetup.Decrypt(encrypted);
//true if decrypted not null
if (decrypted != null)
{
//Convert decrypted bytes to hex string
DecryptedText = ByteConvert.BytesToHexString(decrypted);
}
break;
}
}
/* Attempt to send data */
private void SendData()
{
if (serialPort == null || !serialPort.IsOpen)
{
PutLog("请先连接串口后再发送数据!");
return;
}
try
{
byte[] buffer;
if (SendDataType == 0)
{
buffer = Encoding.GetEncoding(setting.sendDataEncoding).GetBytes(SendDataText);
PutSendDataLog(SendDataType, SendDataText);
}
else if (SendDataType == 1)
{
buffer = ByteConvert.HexStringToBytes(SendDataText);
PutSendDataLog(SendDataType, ByteConvert.BytesToHexString(buffer));
}
else
{
buffer = ByteConvert.BinStringToBytes(SendDataText);
PutSendDataLog(SendDataType, ByteConvert.BytesToBinString(buffer));
}
if (buffer.Length == 0)
{
PutLog("发送数据为空!");
return;
}
serialPort.Write(buffer, 0, buffer.Length);
numberBytesSendInt += buffer.Length;
NumberBytesSend = numberBytesSendInt.ToString();
}
catch (Exception e)
{
PutLog(e.ToString());
}
}
/// <summary>
/// The command method to verify a signature
/// </summary>
private void Verify()
{
var pubKey = File.ReadAllBytes(KeyPairSetup.PublicKeyFilePath);
var signature = ByteConvert.HexStringToBytes(OriginalSignature);
byte[] data = null;
switch (DataInput.DataFormatSelected)
{
case Format.File:
data = File.ReadAllBytes(DataInput.Data);
break;
case Format.Text:
data = ByteConvert.StringToUTF8Bytes(DataInput.Data);
break;
}
SignatureVerified = KeyPairSetup.Verify(signature, pubKey, data);
}
/// <summary>
/// transforms the data to bytes according to the selected format option
/// </summary>
/// <param name="format">The format option to use for byte extraction</param>
/// <param name="data">The data to extract the bytes from</param>
/// <returns>the extracted bytes</returns>
private byte[] GetBytesAccordingToFormatSelected(Format format, string data)
{
byte[] bytes = null;
switch (format)
{
case Format.File:
bytes = ByteConvert.FileToBytes(data);
break;
case Format.Text:
bytes = ByteConvert.StringToAsciiBytes(data);
break;
case Format.Hex:
bytes = ByteConvert.HexStringToBytes(data);
break;
default:
Debugger.Break();
break;
}
return(bytes);
}
/// <summary>
/// The command method to decrypt the given data
/// </summary>
private void Decrypt()
{
//field for saving the encrypted and decrypted byte arrays
byte[] encrypted;
byte[] decryptedBytes;
//Convert the secret key and iv to byte arrays
var secretKey = ByteConvert.HexStringToBytes(SecretKey);
var iv = ByteConvert.HexStringToBytes(IV);
try
{
//Decrypt the data according to the selected file format
switch (DataInput.DataFormatSelected)
{
//Decrypt to a regular string
case Format.Text:
//Convert the text string to a byte array
encrypted = ByteConvert.HexStringToBytes(EncryptedText);
//Decrypt the byte array to a text string
DecryptedText = SelectedCipherApi.DecryptToText(SelectedAlgorithim, SelectedKeySize, secretKey, iv, encrypted);
break;
case Format.Hex:
//Convert the hex string to a byte array
encrypted = ByteConvert.HexStringToBytes(EncryptedText);
//Decrypt the byte array to a decrypted byte array
decryptedBytes = SelectedCipherApi.DecryptToBytes(SelectedAlgorithim, SelectedKeySize, secretKey, iv, encrypted);
//Convert the decrypted byte array to a hex string
DecryptedText = ByteConvert.BytesToHexString(decryptedBytes);
break;
case Format.File:
//Get the encrypted file as a byte array
encrypted = ByteConvert.FileToBytes(EncryptedFilePath);
//Decrypt the byte array to a decrypted byte array
decryptedBytes = SelectedCipherApi.DecryptToBytes(SelectedAlgorithim, SelectedKeySize, secretKey, iv, encrypted);
//Create a new file name with the encrypted file path and the "Decrypted" text
DecryptedFilePath = Path.Combine(Directory.GetParent(EncryptedFilePath).ToString(), Path.GetFileName(EncryptedFilePath).Replace("Encrypted", "Decrypted"));
//Write all byte to the decrypted file
File.WriteAllBytes(DecryptedFilePath, decryptedBytes);
break;
}
}
//catches msdn exceptions
catch (CryptographicException msdnException)
{
//Open a error message box
Dialog.OpenErrorMessageBoxAsync(msdnException, "Decryption Failure", WindowDialogType.Error);
}
//catches bouncy castle exceptions
catch (CryptoException bouncyException)
{
//Open a error message box
Dialog.OpenErrorMessageBoxAsync(bouncyException, "Decryption Failure", WindowDialogType.Error);
}
//Catch any other errors
catch (Exception exception)
{
//Open a error message box
Dialog.OpenErrorMessageBoxAsync(exception, "Unknown Error, Contact Developer", WindowDialogType.Error);
}
}
