rust-win-crypto-ng 0.4.0 Safe bindings to MS Windows Cryptography API Next Generation
Cryptography API Next Generation (CNG) are cryptographic primitives and utilities provided by the operating system and/or hardware. It is available since Windows Vista and replaces the now deprecated CryptoAPI.
The primitives do not depend on OpenSSL or other libraries of the sort, they are provided by Microsoft and/or by the hardware manufacturer. They are the primitives used in kernel space programs. Therefore, if you are using Microsoft Windows, you already accepted to trust these primitives.