private void button_StartToDecrypt_Click(object sender, EventArgs e)
{
try
{
string fileName = textBox_FileNameToDecrypt.Text;
string passwordPhrase = textBox_PasswordToDecrypt.Text;
byte[] key = Utils.GetKeyByPassPhrase(passwordPhrase);
if (!FilterAPI.AESEncryptFile(fileName, (uint)key.Length, key, (uint)FilterAPI.DEFAULT_IV_TAG.Length, FilterAPI.DEFAULT_IV_TAG, false))
{
string lastError = "Decrypt file " + fileName + " failed with error:" + FilterAPI.GetLastErrorMessage();
ShowMessage(lastError, MessageBoxIcon.Error);
}
else
{
string lastError = "Decrypt file " + fileName + " 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 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);
byte[] iv = Utils.GetRandomIV();
if (checkBox_UseDefaultIV.Checked)
{
iv = FilterAPI.DEFAULT_IV_TAG;
}
if (encryptType == FilterAPI.EncryptType.Encryption)
{
retVal = FilterAPI.AESEncryptFile(fileName, (uint)key.Length, key, (uint)iv.Length, iv, true);
}
else
{
if (!checkBox_UseDefaultIV.Checked)
{
uint accessFlags = 0;
retVal = FilterAPI.GetIVTag(fileName, ref iv, ref accessFlags, out lastError);
if (!retVal)
{
MessageBoxHelper.PrepToCenterMessageBoxOnForm(this);
MessageBox.Show(" Get file " + fileName + " IV tag failed with error:" + lastError, encryptType.ToString(), MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
retVal = FilterAPI.AESDecryptFile(fileName, (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);
}
}