public unsafe KeySchedule(IConnectionStateTls13 state, EphemeralBufferPoolWindows pool, ReadableBuffer resumptionSecret)
{
_pool = pool;
_stateData = pool.Rent();
_state = state;
_hashSize = CryptoProvider.HashProvider.HashSize(CipherSuite.HashType);
_stateData.Memory.TryGetPointer(out _secret);
_clientHandshakeTrafficSecret = ((byte *)_secret) + _hashSize;
_serverHandshakeTrafficSecret = _clientHandshakeTrafficSecret + _hashSize;
_masterSecret = _serverHandshakeTrafficSecret + _hashSize;
_clientApplicationTrafficSecret = _masterSecret + _hashSize;
_serverApplicationTrafficSecret = _clientApplicationTrafficSecret + _hashSize;
void *resumptionPointer = null;
int secretLength = 0;
if (resumptionSecret.Length > 0)
{
var stackSecret = stackalloc byte[resumptionSecret.Length];
resumptionSecret.CopyTo(new Span <byte>(stackSecret, resumptionSecret.Length));
secretLength = resumptionSecret.Length;
resumptionPointer = stackSecret;
}
HkdfFunctions.HkdfExtract(CryptoProvider.HashProvider, CipherSuite.HashType, null, 0, resumptionPointer, secretLength, _secret, _hashSize);
}
internal unsafe AeadBulkCipherInstance(SafeBCryptAlgorithmHandle algo, EphemeralBufferPoolWindows bufferPool, BulkCipherType cipherType)
{
_bufferPool = bufferPool;
_algo = algo;
switch (cipherType)
{
case BulkCipherType.AES_128_GCM:
_chainingMode = BCRYPT_CHAIN_MODE_GCM;
_keyLength = 16;
_iVLength = 16;
_overhead = 16;
break;
case BulkCipherType.AES_256_GCM:
_chainingMode = BCRYPT_CHAIN_MODE_GCM;
_keyLength = 32;
_iVLength = 16;
_overhead = 16;
break;
default:
Internal.ExceptionHelper.ThrowException(new InvalidOperationException());
return;
}
_keyStore = bufferPool.Rent(0);
void *tmpPointer;
if (!_keyStore.Memory.TryGetPointer(out tmpPointer))
{
throw new InvalidOperationException("Could not get keystore pointer");
}
_ivPointer = (IntPtr)tmpPointer;
}
internal unsafe AeadBulkCipherInstance(IntPtr cipherType, EphemeralBufferPoolWindows bufferPool, int ivLength, int keySize, int overhead)
{
_overhead = overhead;
_bufferPool = bufferPool;
_cipherType = cipherType;
_iVLength = EVP_CIPHER_iv_length(cipherType);
_sequence = new byte[_iVLength];
_keyLength = keySize;
_keyStore = bufferPool.Rent();
void *tmpPointer;
if (!_keyStore.Memory.TryGetPointer(out tmpPointer))
{
throw new InvalidOperationException("Could not get keystore pointer");
}
_keyPointer = (IntPtr)tmpPointer;
_ivPointer = IntPtr.Add(_keyPointer, _keyLength);
}