/**
* Encrypts clearBytes and prints encrypted data (base64 encoded)
* @param byte[] clearBytes : Clear data to encrypt
* @param bool base64 : Tells if clearBytes contains base64-encoded data (true) or raw data (false)
*/
static void Encrypt(byte[] clearBytes, bool base64)
{
// base64 decode clearBytes
if (base64)
{
string base64string = Encoding.UTF8.GetString(clearBytes);
try
{
clearBytes = Convert.FromBase64String(base64string);
}
catch (FormatException)
{
Console.Error.WriteLine("Input data cannot be read as base64");
return;
}
}
// Encryption
byte[] entropy = null;
byte[] encrypted = DPAPI.Encrypt(DPAPI.KeyType.UserKey, clearBytes, entropy, "Encrypted with Windows DPAPI through dpapibridge");
// Print result
string encryptedBase64 = Convert.ToBase64String(encrypted);
Console.Out.WriteLine(encryptedBase64);
}
/**
* Decrypts encryptedBytes and prints clear data
* @param byte[] encryptedBytes : Encrypted data to decrypt, base64-encoded
* @param bool base64 : Encode output as base64 if true (useful when clear data contains non ASCII bytes)
* @param string outputFile : File path to send output
*/
static void Decrypt(byte[] encryptedBytes, bool base64, string outputFile)
{
// base64 decode encryptedBytes
string base64string = Encoding.UTF8.GetString(encryptedBytes);
try
{
encryptedBytes = Convert.FromBase64String(base64string);
}
catch (FormatException)
{
Console.Error.WriteLine("Cannot base64-decode input");
return;
}
// Decryption
byte[] entropy = null;
string description;
byte[] decrypted;
try
{
decrypted = DPAPI.Decrypt(encryptedBytes, entropy, out description);
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message);
return;
}
// Save output to file
string output;
if (outputFile != null)
{
if (base64)
{
output = Convert.ToBase64String(decrypted);
decrypted = Encoding.UTF8.GetBytes(output);
}
File.WriteAllBytes(outputFile, decrypted);
Console.WriteLine("output saved to" + outputFile);
return;
}
// Print result
if (base64)
{
output = Convert.ToBase64String(decrypted);
}
else
{
output = Encoding.UTF8.GetString(decrypted);
}
Console.Out.WriteLine(output);
}