#include "x25519_handshake.hpp"
#include <cstdio>
#include <cstring>
#include <iostream>
extern "C" {
#include "monocypher.h"
}

void x25519GenerateEphemeral(AppConfig &config){
    FILE* f=fopen("/dev/urandom","rb");
    if(!f)return;
    fread(config.ephemeralSec,1,32,f);
    fclose(f);
    crypto_x25519_public_key(config.ephemeralPub,config.ephemeralSec);
    std::memset(config.sharedSecret,0,32);
    config.haveSharedSecret=false;
}

void x25519ComputeShared(AppConfig &config,const uint8_t otherPub[32]){
    uint8_t shared[32];
    crypto_x25519(shared,config.ephemeralSec,otherPub);
    std::memcpy(config.sharedSecret,shared,32);
    config.haveSharedSecret=true;
    std::cout<<CLR_GREEN<<"[x25519] key computed!\n"<<CLR_RESET;
}