private unsafe Exception?TryDecryptTrans(KeyTransRecipientInfo recipientInfo, SafeProvOrNCryptKeyHandle hKey, CryptKeySpec keySpec)
{
KeyTransRecipientInfoPalWindows pal = (KeyTransRecipientInfoPalWindows)(recipientInfo.Pal);
bool keyAddRefd = false;
try
{
CMSG_CTRL_DECRYPT_PARA decryptPara;
decryptPara.cbSize = sizeof(CMSG_CTRL_DECRYPT_PARA);
hKey.DangerousAddRef(ref keyAddRefd);
decryptPara.hKey = hKey.DangerousGetHandle();
decryptPara.dwKeySpec = keySpec;
decryptPara.dwRecipientIndex = pal.Index;
bool success = Interop.Crypt32.CryptMsgControl(_hCryptMsg, 0, MsgControlType.CMSG_CTRL_DECRYPT, ref decryptPara);
if (!success)
{
return(Marshal.GetHRForLastWin32Error().ToCryptographicException());
}
return(null);
}
finally
{
if (keyAddRefd)
{
hKey.DangerousRelease();
}
}
}
private Exception TryDecryptTrans(KeyTransRecipientInfo recipientInfo, SafeProvOrNCryptKeyHandle hKey, CryptKeySpec keySpec)
{
KeyTransRecipientInfoPalWindows pal = (KeyTransRecipientInfoPalWindows)(recipientInfo.Pal);
CMSG_CTRL_DECRYPT_PARA decryptPara;
decryptPara.cbSize = Marshal.SizeOf <CMSG_CTRL_DECRYPT_PARA>();
decryptPara.hKey = hKey;
decryptPara.dwKeySpec = keySpec;
decryptPara.dwRecipientIndex = pal.Index;
bool success = Interop.Crypt32.CryptMsgControl(_hCryptMsg, 0, MsgControlType.CMSG_CTRL_DECRYPT, ref decryptPara);
if (!success)
{
return(Marshal.GetHRForLastWin32Error().ToCryptographicException());
}
return(null);
}
