// Function to decrypt the main store.
public static List <string> DecryptStoreFile(string masterPassword)
{
// Get required variables.
string[] storeFileContents = GetStoreFileContents();
byte[] nonce = GetNonce();
byte[] key = GetKey(masterPassword);
List <string> decryptedList = new List <string>();
// Decrypt each password entry. Work backwards with last nonce used, as nonce decrements.
for (int i = storeFileContents.Length - 1; i > -1; i--)
{
byte[] dataToDecrypt = Convert.FromBase64String(storeFileContents[i]);
var decrypted = SecretAeadAes.Decrypt(dataToDecrypt, nonce, key);
decryptedList.Add(Encoding.ASCII.GetString(decrypted));
// Decrement nonce to get each nonce used to encrypt password entry.
ByteOperation.Decrement(ref nonce);
}
// Return list containing all decrypted password entries.
return(decryptedList);
}
// Function to encrypt the main store.
public static void EncryptStoreFile(string masterPassword, string[] dataToEncrypt)
{
// Get required variables.
byte[] nonce = GetNonce();
byte[] key = GetKey(masterPassword);
// Clear main store.
File.WriteAllText(PIMUX_STORE, "");
// Encrypt each password entry.
for (int i = 0; i < dataToEncrypt.Length; i++)
{
// Increment nonce so every password entry uses a different nonce.
ByteOperation.Increment(ref nonce);
byte[] byteDataToEnc = Encoding.ASCII.GetBytes(dataToEncrypt[i]);
var encrypted = SecretAeadAes.Encrypt(byteDataToEnc, nonce, key);
File.AppendAllText(PIMUX_STORE, Convert.ToBase64String(encrypted) + Environment.NewLine);
}
// Write nonce to file.
File.WriteAllText(PIMUX_STORE_NONCE, Convert.ToBase64String(nonce));
}