In this post, you’ll learn more about the Error CRYPT_E_STREAM_MSG_NOT_READY – 0x80091010 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
CRYPT_E_STREAM_MSG_NOT_READY – 0x80091010
Win32 COM Error Error Description
The streamed cryptographic message is not ready to return data.