loadandverify.go

package main

import (
	"crypto/ecdsa"
	"crypto/elliptic"
	"crypto/rand"
	"io/ioutil"
	"log"

	"github.com/joncooperworks/signedplugin"
)

const (
	pluginPath = "exampleplugin.so"
)

func main() {
	key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
	if err != nil {
		log.Fatalln(err.Error())
	}
  
	p, err := ioutil.ReadFile(pluginPath)
	if err != nil {
		log.Fatalln(err.Error())
	}

	signature, err := signedplugin.Sign(key, p)
	if err != nil {
		log.Fatalln(err.Error())
	}
  
	publicKey := key.Public().(*ecdsa.PublicKey)
	log.Println("Attempting to verify with correct signature.")
	plugin, err := signedplugin.Open(publicKey, signature, pluginPath)
	if err != nil {
		log.Fatalln(err.Error())
	}

	sym, err := plugin.Lookup("Hello")
	if err != nil {
		log.Fatalln(err.Error())
	}
	Hello := sym.(func())
	Hello()
}