// Start begins the source scanner. This function will continually
// load the target list, and deliver entropy packets as appropriate.
func Start(signer *rsa.PrivateKey, targetFile string) {
defer prng.StoreSeed()
var delay = 6 * time.Hour
var targetUpdate bool
for {
log.Println("scanning targets")
now := time.Now().Unix()
targets := target.Load(targetFile)
for i, t := range targets {
updated := targetCheck(t, signer, now)
if updated {
targets[i].Next = now + int64(delay.Seconds())
targetUpdate = true
}
}
if targetUpdate {
err := target.Store(targetFile, targets)
if err != nil {
log.Printf("%v", err)
}
targetUpdate = false
}
<-time.After(1 * time.Minute)
}
}
func main() {
flag.StringVar(&config.signer, "k", "signer.key", "signature key")
seedFile := flag.String("s", "source.seed", "PRNG seed file")
flag.StringVar(&config.targets, "t", "targets.json", "test targets")
flag.Parse()
in, err := ioutil.ReadFile(config.signer)
if err != nil {
log.Fatalf("%v", err)
}
signer, err := x509.ParsePKCS1PrivateKey(in)
if err != nil {
log.Fatalf("%v", err)
}
prng.Start(*seedFile)
defer prng.StoreSeed()
source.Start(signer, config.targets)
}