This is a test project that implements the some cryptographic primitives in C++ and Rust and compare results. The main goal of this is to learn (for me) about the cryptographic primitives and the use of big number libraries in C++ and Rust.

Currently this includes only some code to

1. Generate sha256 hash for strings and generic binary messages.
2. Generate ECDSA key pairs
3. Sign a message with the private key.
4. Validate the signatures given the public keys, the signature and the message.

This does not use any ssl or cryptographic library or rust crate. Only the gmp library for bit integers in C++ and num_bigint for Rust.

TODO: Implement my own bigint library.