Using Microsoft cryptographic API

Question

I am using Visual studio and developing application. I come across Bcrypt.h header - Win32 apps | Microsoft Learn Microsoft cryptographic library.

I would like to know If there any additional license cost of using this library or we can use it as part of normal SDK. Is there any patent or cost using this library in our application?

I also observe some cryptographic algorithms like Ed25519 and curve25519 interfaces are not present in above library. Any reason for it?

Any recommendation from where we can use those API?

Answer 1

Hi,

Welcome to Microsoft Q&A!

I would like to know If there any additional license cost of using this library or we can use it as part of normal SDK. Is there any patent or cost using this library in our application?

As far as I'm concerned you could use this library for free.

I also observe some cryptographic algorithms like Ed25519 and curve25519 interfaces are not present in above library. Any reason for it?

CNG provides support for curve25519.

I suggest you could refer to the following docs:
1,Cryptography API: Next Generation
2,CNG Named Elliptic Curves

Any recommendation from where we can use those API?

For more details about cryptographic, I suggest you could start from the Docs: Cryptography and Security and Identity

Best Regards,

Jeanine

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Answer 2

Thank you!