ImportEncryptedPkcs8() [2/2]

static unsafe CngKey System.Security.Cryptography.CngKey.ImportEncryptedPkcs8 ( ReadOnlySpan< byte > keyBlob, ReadOnlySpan< char > password, CngProvider provider )

inlinestaticpackage

Definition at line 550 of file CngKey.cs.

    {
        SafeNCryptProviderHandle safeNCryptProviderHandle = provider.OpenStorageProvider();
        SafeNCryptKeyHandle phKey;
        using (Microsoft.Win32.SafeHandles.SafeUnicodeStringHandle safeUnicodeStringHandle = new Microsoft.Win32.SafeHandles.SafeUnicodeStringHandle(password))
        {
            global::Interop.NCrypt.NCryptBuffer* ptr = stackalloc global::Interop.NCrypt.NCryptBuffer[1];
            *ptr = new global::Interop.NCrypt.NCryptBuffer
            {
                BufferType = global::Interop.NCrypt.BufferType.PkcsSecret,
                cbBuffer = checked(2 * (password.Length + 1)),
                pvBuffer = safeUnicodeStringHandle.DangerousGetHandle()
            };
            if (ptr->pvBuffer == IntPtr.Zero)
            {
                ptr->cbBuffer = 0;
            }
            global::Interop.NCrypt.NCryptBufferDesc nCryptBufferDesc = default(global::Interop.NCrypt.NCryptBufferDesc);
            nCryptBufferDesc.cBuffers = 1;
            nCryptBufferDesc.pBuffers = (IntPtr)ptr;
            nCryptBufferDesc.ulVersion = 0;
            global::Interop.NCrypt.NCryptBufferDesc pParameterList = nCryptBufferDesc;
            global::Interop.NCrypt.ErrorCode errorCode = global::Interop.NCrypt.NCryptImportKey(safeNCryptProviderHandle, IntPtr.Zero, "PKCS8_PRIVATEKEY", ref pParameterList, out phKey, ref MemoryMarshal.GetReference(keyBlob), keyBlob.Length, 0);
            if (errorCode != 0)
            {
                phKey.Dispose();
                throw errorCode.ToCryptographicException();
            }
        }
        CngKey cngKey = new CngKey(safeNCryptProviderHandle, phKey);
        cngKey.IsEphemeral = true;
        return cngKey;
    }

References System.Security.Cryptography.CngKey.CngKey(), System.Runtime.InteropServices.SafeHandle.DangerousGetHandle(), System.ReadOnlySpan< T >.Length, and System.IntPtr.Zero.