private byte[] _currentIv; // CNG mutates this with the updated IV for the next stage on each Encrypt/Decrypt call.
// The base IV holds a copy of the original IV for Reset(), until it is cleared by Dispose().
public CngCipher(SafeAlgorithmHandle algorithm, CipherMode cipherMode, int blockSizeInBytes, byte[] key, byte[] iv, bool encrypting)
: base(cipherMode.GetCipherIv(iv), blockSizeInBytes)
{
Debug.Assert(algorithm != null);
_encrypting = encrypting;
if (IV != null)
{
_currentIv = new byte[IV.Length];
}
_hKey = algorithm.BCryptImportKey(key);
Reset();
}
private byte[] _currentIv; // CNG mutates this with the updated IV for the next stage on each Encrypt/Decrypt call.
// The base IV holds a copy of the original IV for Reset(), until it is cleared by Dispose().
public BasicSymmetricCipherBCrypt(SafeAlgorithmHandle algorithm, CipherMode cipherMode, int blockSizeInBytes, byte[] key, int effectiveKeyLength, byte[] iv, bool encrypting)
: base(cipherMode.GetCipherIv(iv), blockSizeInBytes)
{
Debug.Assert(algorithm != null);
_encrypting = encrypting;
if (IV != null)
{
_currentIv = new byte[IV.Length];
}
_hKey = algorithm.BCryptImportKey(key);
if (effectiveKeyLength != 0)
{
Cng.SetEffectiveKeyLength(_hKey, effectiveKeyLength);
}
Reset();
}
public static extern NTSTATUS BCryptImportKey(SafeAlgorithmHandle hAlgorithm, IntPtr hImportKey, String pszBlobType, out SafeKeyHandle hKey, IntPtr pbKeyObject, int cbKeyObject, byte[] pbInput, int cbInput, int dwFlags);
public static extern unsafe NTSTATUS BCryptSetProperty(SafeAlgorithmHandle hObject, String pszProperty, String pbInput, int cbInput, int dwFlags);
public static extern NTSTATUS BCryptCreateHash(SafeAlgorithmHandle hAlgorithm, out SafeHashHandle phHash, IntPtr pbHashObject, int cbHashObject, [In, Out] byte[] pbSecret, int cbSecret, int dwFlags);
public static extern NTSTATUS BCryptOpenAlgorithmProvider(out SafeAlgorithmHandle phAlgorithm, String pszAlgId, String pszImplementation, int dwFlags);
public static extern NTSTATUS BCryptImportKey(SafeAlgorithmHandle hAlgorithm, IntPtr hImportKey, String pszBlobType, out SafeKeyHandle hKey, IntPtr pbKeyObject, int cbKeyObject, byte[] pbInput, int cbInput, int dwFlags);
public static extern unsafe NTSTATUS BCryptSetProperty(SafeAlgorithmHandle hObject, String pszProperty, String pbInput, int cbInput, int dwFlags);
public static extern NTSTATUS BCryptOpenAlgorithmProvider(out SafeAlgorithmHandle phAlgorithm, String pszAlgId, String pszImplementation, int dwFlags);