TryAcquireCngPrivateKey()

static SafeNCryptKeyHandle Internal.Cryptography.Pal.CertificatePal.TryAcquireCngPrivateKey ( SafeCertContextHandle certificateContext, out CngKeyHandleOpenOptions handleOptions )

inlinestaticprivate

Definition at line 788 of file CertificatePal.cs.

    {
        if (!certificateContext.HasPersistedPrivateKey)
        {
            int pcbData = IntPtr.Size;
            if (global::Interop.crypt32.CertGetCertificateContextProperty(certificateContext, CertContextPropId.CERT_NCRYPT_KEY_HANDLE_PROP_ID, out IntPtr pvData, ref pcbData))
            {
                handleOptions = CngKeyHandleOpenOptions.EphemeralKey;
                return new SafeNCryptKeyHandle(pvData, certificateContext);
            }
        }
        bool pfCallerFreeProvOrNCryptKey = true;
        SafeNCryptKeyHandle phCryptProvOrNCryptKey = null;
        handleOptions = CngKeyHandleOpenOptions.None;
        try
        {
            int pdwKeySpec = 0;
            if (!global::Interop.crypt32.CryptAcquireCertificatePrivateKey(certificateContext, CryptAcquireFlags.CRYPT_ACQUIRE_ONLY_NCRYPT_KEY_FLAG, IntPtr.Zero, out phCryptProvOrNCryptKey, out pdwKeySpec, out pfCallerFreeProvOrNCryptKey))
            {
                pfCallerFreeProvOrNCryptKey = false;
                phCryptProvOrNCryptKey?.SetHandleAsInvalid();
                return null;
            }
            if (!pfCallerFreeProvOrNCryptKey && phCryptProvOrNCryptKey != null && !phCryptProvOrNCryptKey.IsInvalid)
            {
                SafeNCryptKeyHandle safeNCryptKeyHandle = new SafeNCryptKeyHandle(phCryptProvOrNCryptKey.DangerousGetHandle(), certificateContext);
                phCryptProvOrNCryptKey.SetHandleAsInvalid();
                phCryptProvOrNCryptKey = safeNCryptKeyHandle;
                pfCallerFreeProvOrNCryptKey = true;
            }
            return phCryptProvOrNCryptKey;
        }
        catch
        {
            if (phCryptProvOrNCryptKey != null && !pfCallerFreeProvOrNCryptKey)
            {
                phCryptProvOrNCryptKey.SetHandleAsInvalid();
            }
            throw;
        }
    }

References System.IntPtr.Size, and System.IntPtr.Zero.

Referenced by Internal.Cryptography.Pal.CertificatePal.GetPrivateKey< T >().