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package main
import (
"crypto"
"encoding/base64"
"flag"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"golang.org/x/crypto/ed25519"
)
func main() {
var doGenerate bool
flag.BoolVar(&doGenerate, "g", false, "Generate a keypair")
var doPrintPub bool
flag.BoolVar(&doPrintPub, "p", false, "Print the pub key")
var doSign bool
flag.BoolVar(&doSign, "s", false, "Sign the release tar")
var publicKeyString string
flag.StringVar(&publicKeyString, "k", "", "Public key to verify against (runs verifier if set)")
flag.Parse()
if doGenerate {
generateKeypair()
os.Exit(0)
}
if doPrintPub {
pub, _ := loadKeys()
fmt.Printf("Public key: %s\n", base64.StdEncoding.EncodeToString(pub))
os.Exit(0)
}
if doSign {
_, priv := loadKeys()
file, err := ioutil.ReadFile("bin/NoiseTorch_x64.tgz")
if err != nil {
panic(err)
}
sig, err := priv.Sign(nil, file, crypto.Hash(0))
if err != nil {
panic(err)
}
if err := ioutil.WriteFile("bin/NoiseTorch_x64.tgz.sig", sig, 0644); err != nil {
panic(err)
}
os.Exit(0)
}
if publicKeyString != "" {
pub, err := base64.StdEncoding.DecodeString(publicKeyString)
if err != nil {
panic(err)
}
file, err := ioutil.ReadFile("bin/NoiseTorch_x64.tgz")
if err != nil {
panic(err)
}
sig, err := ioutil.ReadFile("bin/NoiseTorch_x64.tgz.sig")
if err != nil {
panic(err)
}
verified := ed25519.Verify(pub, file, sig)
fmt.Printf("Verified %t\n", verified)
}
}
func loadKeys() (ed25519.PublicKey, ed25519.PrivateKey) {
seed, err := ioutil.ReadFile(filepath.Join(os.Getenv("HOME"), ".config/noisetorch/private.key"))
if err != nil {
panic(err)
}
priv := ed25519.NewKeyFromSeed(seed)
pub := priv.Public().(ed25519.PublicKey)
return pub, priv
}
func generateKeypair() {
pub, priv, err := ed25519.GenerateKey(nil)
if err != nil {
panic(err)
os.Exit(1)
}
if err := ioutil.WriteFile(filepath.Join(os.Getenv("HOME"), ".config/noisetorch/private.key"), priv.Seed(), 0600); err != nil {
panic(err)
os.Exit(2)
}
fmt.Printf("Private key generated and saved.\nPublic key: %s\n", base64.StdEncoding.EncodeToString(pub))
}
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