/// <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 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;
}
}
/// <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>
/// The command method to sign some data
/// </summary>
private void Sign()
{
var privKey = File.ReadAllBytes(KeyPairSetup.PrivateKeyFilePath);
byte[] data = null;
switch (DataInput.DataFormatSelected)
{
case Format.File:
data = File.ReadAllBytes(DataInput.Data);
break;
case Format.Text:
data = ByteConvert.StringToUTF8Bytes(DataInput.Data);
break;
}
var signature = KeyPairSetup.Sign(privKey, data);
OriginalSignature = ByteConvert.BytesToHexString(signature);
}
/// <summary>
/// The command method to derive a shared secret key from the other party public key and our own keys
/// </summary>
private void DeriveKey()
{
var derivedKey = KeyPairSetup.DeriveKey();
DerivedKey = ByteConvert.BytesToHexString(derivedKey);
}
