//Make these private
private byte[] GetEncryptedPublicKey(byte[] key, UInt64 counter)
{
return(Utility.AESGetEncrypt(key, GetPublicKeyMpiBytes(), counter));
}
private void ComputeSignatureValues(AKEKeys ake_keys, byte[] x_byte_array_data, UInt64 aes_counter, bool is_top_half_keys)
{
if (ake_keys == null)
{
throw new ArgumentException("ComputeSignatureValues: AKE keys object should not be null");
}
if (is_top_half_keys == true && (ake_keys.GetAESKey1() == null || ake_keys.GetAESKey1().Length < 1))
{
throw new ArgumentException("ComputeSignatureValues: The AKE AES key 1 should not be null/empty");
}
if (is_top_half_keys == false && (ake_keys.GetAESKey2() == null || ake_keys.GetAESKey2().Length < 1))
{
throw new ArgumentException("ComputeSignatureValues: The AKE AES key 2 should not be null/empty");
}
if (x_byte_array_data == null || x_byte_array_data.Length < 1)
{
throw new ArgumentException("ComputeSignatureValues: The x_byte_array_data cannot be null/empty");
}
if (aes_counter < 0)
{
throw new ArgumentException("ComputeSignatureValues: The aes counter value cannot be less than zero");
}
byte[] _encrypted_signature_byte_array = null;
if (is_top_half_keys == true)
{
_encrypted_signature_byte_array = Utility.AESGetEncrypt(ake_keys.GetAESKey1(), x_byte_array_data, aes_counter);
}
else
{
_encrypted_signature_byte_array = Utility.AESGetEncrypt(ake_keys.GetAESKey2(), x_byte_array_data, aes_counter);
}
try
{
Utility.EncodeOTRDataBE(_encrypted_signature_byte_array, ref _encoded_encrypted_signature_byte_array);
}
catch (Exception ex)
{
throw new InvalidDataException("ComputeSignatureValues:" + ex.ToString());
}
if (is_top_half_keys == true && (ake_keys.GetMACKey2() == null || ake_keys.GetMACKey2().Length < 1))
{
throw new InvalidDataException("ComputeSignatureValues: The AKE MAC key 2 should not be null/empty");
}
if (is_top_half_keys == false && (ake_keys.GetMACKey4() == null || ake_keys.GetMACKey4().Length < 1))
{
throw new InvalidDataException("ComputeSignatureValues: The AKE MAC key 4 should not be null/empty");
}
if (is_top_half_keys == true)
{
_hashed_encoded_encrypted_byte_array = Utility.SHA256GetKeyedHash(ake_keys.GetMACKey2(), _encoded_encrypted_signature_byte_array);
}
else
{
_hashed_encoded_encrypted_byte_array = Utility.SHA256GetKeyedHash(ake_keys.GetMACKey4(), _encoded_encrypted_signature_byte_array);
}
_truncated_hash_signature = new byte[OTRConstants.MAC_SIGNATURE_LENGTH_BITS / 8];
Buffer.BlockCopy(_hashed_encoded_encrypted_byte_array, 0, _truncated_hash_signature, 0, _truncated_hash_signature.Length);
}