public CIPHER(CType type, CMode mode, bool encrypt)
{
EVP_CIPHER * cipher = null; // Statically allocated (MT), don't free
EVP_CIPHER_CTX *handle = null;
try {
cipher = (EVP_CIPHER *)_ciphers[new Tuple <CType, CMode>(type, mode)]();
} catch (KeyNotFoundException) {}
if (cipher == null)
{
goto Bailout;
}
if ((handle = _CIPHER.EVP_CIPHER_CTX_new()) == null)
{
goto Bailout;
}
_CIPHER.EVP_CIPHER_CTX_init(handle);
if (_CIPHER.EVP_CipherInit_ex(handle, cipher, IntPtr.Zero, null, null, encrypt ? 1 : 0) == 0)
{
goto Bailout;
}
_CIPHER.EVP_CIPHER_CTX_set_padding(handle, 0);
this._handle = handle;
this._type = type;
this._mode = mode;
this._encrypt = encrypt;
return;
Bailout:
if (handle != null)
{
_CIPHER.EVP_CIPHER_CTX_free(handle);
}
throw new EVPException();
}
public static extern int EVP_CipherInit_ex(EVP_CIPHER_CTX *handle, EVP_CIPHER *cipher, IntPtr engine, byte[] key, byte[] iv, int enc);
