DeriveKeyMaterial() [2/4]

static unsafe byte[] Interop.NCrypt.DeriveKeyMaterial ( SafeNCryptSecretHandle secretAgreement, string kdf, ReadOnlySpan< NCryptBuffer > parameters, SecretAgreementFlags flags )

inlinestaticprivate

Definition at line 755 of file Interop.cs.

        {
            fixed (NCryptBuffer* value = &MemoryMarshal.GetReference(parameters))
            {
                NCryptBufferDesc pParameterList = default(NCryptBufferDesc);
                pParameterList.ulVersion = 0;
                pParameterList.cBuffers = parameters.Length;
                pParameterList.pBuffers = new IntPtr(value);
                ErrorCode errorCode = NCryptDeriveKey(secretAgreement, kdf, ref pParameterList, null, 0, out var pcbResult, flags);
                if (errorCode != 0 && errorCode != ErrorCode.NTE_BUFFER_TOO_SMALL)
                {
                    throw errorCode.ToCryptographicException();
                }
                byte[] array = new byte[pcbResult];
                errorCode = NCryptDeriveKey(secretAgreement, kdf, ref pParameterList, array, array.Length, out pcbResult, flags);
                if (errorCode != 0)
                {
                    throw errorCode.ToCryptographicException();
                }
                Array.Resize(ref array, Math.Min(pcbResult, array.Length));
                return array;
            }
        }

References System.array, System.ReadOnlySpan< T >.Length, System.Math.Min(), Interop.NCrypt.NCryptDeriveKey(), and System.value.