A .NET library to serve as extension of standard .NET libraries and example how to use Ed25519 and Ed448 to sign / verify signatures of JSONs, especially in regards to JAdES. Also may be used by parties to exchnage private key material using X25519 and X448.
Get Started
$ dotnet add package CryptoEx.EdReadme
About CryptoEx.Ed project
Extension of the logic in the core library (CryptoEx) to support Ed25519 & Ed448 cryptographic algorithms for digital signatures and X25519 & X448 algorithms for Diffie-Hellman key agreement. The project also implements JWSs (JSON Web signatures) and jAdES (Advanced JSON Web Signatures) with EdDSA algorithm.
I have decided to put these on a different project (different from CryptoEx), mainly because Ed25519, Ed448, X25519 & X448 are still not implemented in main-stream .NET. So, It need to rely on third-party libraries, such as:
- Bouncy Castle
- libsodium based wrappers
At the moment I have decided to use Bounty Castle, because it is 100% managed code and it is also performance optimized. The CryptoEx.Ed project has a dependency on Bounty Castle.
The project implements Ed signatures and key-exchanges in an similar to the standard .NET way and it can be used by .NET developers in a familiar way - as EC (Elliptic curves) are being used.
As a practical example of the usage of the Ed classes in the library, I have also extended the classes for JWSs (JSON Web Signatures) and for the jAdES (Advanced JSON Web Signatures) from the core library to implement EdDSA algorithm for them.
You can check the code and some documentation pages in the Wiki, for HOWTOs.