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package main
import (
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"net/http"
"strings"
ct "github.com/google/certificate-transparency/go"
"github.com/google/certificate-transparency/go/gossip"
)
var dbPath = flag.String("database", "/tmp/gossip.sq3", "Path to database.")
var listenAddress = flag.String("listen", ":8080", "Listen address:port for HTTP server.")
var logKeys = flag.String("log_public_keys", "", "Comma separated list of files containing trusted Logs' public keys in PEM format")
func createVerifiers() (*gossip.SignatureVerifierMap, error) {
m := make(gossip.SignatureVerifierMap)
if len(*logKeys) == 0 {
return nil, errors.New("--log_public_keys is empty")
}
keys := strings.Split(*logKeys, ",")
for _, k := range keys {
pem, err := ioutil.ReadFile(k)
if err != nil {
return nil, fmt.Errorf("failed to read specified PEM file %s: %v", k, err)
}
for len(pem) > 0 {
key, id, rest, err := ct.PublicKeyFromPEM(pem)
pem = rest
if err != nil {
return nil, fmt.Errorf("failed to read public key from PEM in file %s: %v", k, err)
}
sv, err := ct.NewSignatureVerifier(key)
if err != nil {
return nil, fmt.Errorf("Failed to create new SignatureVerifier: %v", err)
}
m[id] = *sv
log.Printf("Loaded key for LogID %v", id)
}
}
return &m, nil
}
func main() {
flag.Parse()
verifierMap, err := createVerifiers()
if err != nil {
log.Fatalf("Failed to load log public keys: %v", err)
}
log.Print("Starting gossip server.")
storage := gossip.Storage{}
if err := storage.Open(*dbPath); err != nil {
log.Fatalf("Failed to open storage: %v", err)
}
defer storage.Close()
handler := gossip.NewHandler(&storage, *verifierMap)
serveMux := http.NewServeMux()
serveMux.HandleFunc("/.well-known/ct/v1/sct-feedback", handler.HandleSCTFeedback)
serveMux.HandleFunc("/.well-known/ct/v1/sth-pollination", handler.HandleSTHPollination)
server := &http.Server{
Addr: *listenAddress,
Handler: serveMux,
}
if err := server.ListenAndServe(); err != nil {
log.Printf("Error serving: %v", err)
}
}
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