INNER CODE UNIT · C#
ciphertextLength
sdrapkin/SecurityDriven.Inferno · EtM_CBC.cs:56
int ciphertextLength = CONTEXT_BUFFER_LENGTH + plaintext.Count + paddingLength + MAC_LENGTH;
if (output.Length - outputOffset < ciphertextLength) throw new ArgumentOutOfRangeException(nameof(output), $"'{nameof(output)}' array segment is not big enough for the ciphertext");
try
{
var iv = _iv.Value;
var contextBuffer = _contextBuffer.Value;
var encKey = _encKey.Value;
var macKey = _macKey.Value;
var sessionKey = _sessionKey.Value;
using (var aes = _aesFactory())
{
EtM_CBC.ValidateAes(aes);
_cryptoRandom.NextBytes(contextBuffer, 0, CONTEXT_BUFFER_LENGTH);
Utils.BlockCopy(contextBuffer, CONTEXT_TWEAK_LENGTH, iv, 0, AES_IV_LENGTH);
Kdf.SP800_108_Ctr.DeriveKey(hmacFactory: _hmacFactory, key: masterKey, label: salt, context: contextBuffer.AsArraySegment(), derivedOutput: sessionKey.AsArraySegment(), counter: counter);