private void button_StartToDecrypt_Click(object sender, EventArgs e)
{
try
{
string fileName = textBox_DecryptSourceName.Text;
string targetFileName = textBox_DecryptTargetName.Text;
byte[] key = Utils.GetKeyByPassPhrase(GlobalConfig.MasterPassword, 32);
bool retVal = false;
if (fileName.Equals(targetFileName, StringComparison.CurrentCulture))
{
retVal = FilterAPI.AESDecryptFile(fileName, (uint)key.Length, key, (uint)FilterAPI.DEFAULT_IV_TAG.Length, FilterAPI.DEFAULT_IV_TAG);
}
else
{
retVal = FilterAPI.AESDecryptFileToFile(fileName, targetFileName, (uint)key.Length, key, (uint)FilterAPI.DEFAULT_IV_TAG.Length, FilterAPI.DEFAULT_IV_TAG);
}
if (!retVal)
{
string lastError = "Decrypt file " + fileName + " failed with error:" + FilterAPI.GetLastErrorMessage();
ShowMessage(lastError, MessageBoxIcon.Error);
}
else
{
string lastError = "Decrypt file " + fileName + " to " + targetFileName + " succeeded.";
ShowMessage(lastError, MessageBoxIcon.Information);
}
}
catch (Exception ex)
{
string lastError = "Decrypt file failed with error:" + ex.Message;
ShowMessage(lastError, MessageBoxIcon.Error);
}
}
private void button_Start_Click(object sender, EventArgs e)
{
string passPhrase = textBox_PassPhrase.Text.Trim();
string fileName = textBox_FileName.Text.Trim();
string targetFileName = textBox_TargetFileName.Text.Trim();
string lastError = string.Empty;
bool retVal = false;
if (passPhrase.Length == 0)
{
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show("Password phrase can't be empty.", "Encryption", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (fileName.Length == 0)
{
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show("File name can't be empty.", "Encryption", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
byte[] key = Utils.GetKeyByPassPhrase(passPhrase, 32);
byte[] iv = Utils.GetRandomIV();
if (encryptType == FilterAPI.EncryptType.Encryption)
{
if (fileName.Equals(targetFileName, StringComparison.CurrentCulture))
{
retVal = FilterAPI.AESEncryptFileWithTag(fileName, (uint)key.Length, key, (uint)iv.Length, iv, (uint)iv.Length, iv);
}
else
{
retVal = FilterAPI.AESEncryptFileToFileWithTag(fileName, targetFileName, (uint)key.Length, key, (uint)iv.Length, iv, (uint)iv.Length, iv);
}
}
else
{
uint ivLength = (uint)iv.Length;
retVal = FilterAPI.GetAESTagData(fileName, ref ivLength, iv);
if (!retVal)
{
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show("Decrypt file failed with error " + FilterAPI.GetLastErrorMessage(), "Decryption", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (fileName.Equals(targetFileName, StringComparison.CurrentCulture))
{
retVal = FilterAPI.AESDecryptFile(fileName, (uint)key.Length, key, (uint)iv.Length, iv);
}
else
{
retVal = FilterAPI.AESDecryptFileToFile(fileName, targetFileName, (uint)key.Length, key, (uint)iv.Length, iv);
}
}
if (!retVal)
{
string errorMessage = FilterAPI.GetLastErrorMessage();
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show(encryptType.ToString() + " file " + fileName + " failed with error:" + errorMessage, encryptType.ToString(), MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
else
{
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show(encryptType.ToString() + " file " + fileName + " succeeded.", encryptType.ToString(), MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}