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// Package main provides an STFE server binary
package main
import (
"flag"
"fmt"
"time"
"crypto/x509"
"io/ioutil"
"net/http"
"github.com/golang/glog"
"github.com/google/trillian"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/system-transparency/stfe"
"github.com/system-transparency/stfe/x509util"
"google.golang.org/grpc"
)
var (
httpEndpoint = flag.String("http_endpoint", "localhost:6965", "host:port specification of where stfe serves clients")
rpcBackend = flag.String("log_rpc_server", "localhost:6962", "host:port specification of where Trillian serves clients")
prefix = flag.String("prefix", "st/v1", "a prefix that proceeds each endpoint path")
trillianID = flag.Int64("trillian_id", 5991359069696313945, "log identifier in the Trillian database")
rpcDeadline = flag.Duration("rpc_deadline", time.Second*10, "deadline for backend RPC requests")
anchorPath = flag.String("anchor_path", "../x509util/testdata/anchors.pem", "path to a file containing PEM-encoded X.509 root certificates")
keyPath = flag.String("key_path", "../x509util/testdata/log.key", "path to a PEM-encoded ed25519 signing key")
maxRange = flag.Int64("max_range", 2, "maximum number of entries that can be retrived in a single request")
maxChain = flag.Int64("max_chain", 3, "maximum number of certificates in a chain, including the trust anchor")
)
func main() {
flag.Parse()
glog.Info("Dialling Trillian gRPC log server")
dialOpts := []grpc.DialOption{grpc.WithInsecure(), grpc.WithBlock(), grpc.WithTimeout(*rpcDeadline)}
conn, err := grpc.Dial(*rpcBackend, dialOpts...)
if err != nil {
glog.Fatal(err)
}
client := trillian.NewTrillianLogClient(conn)
glog.Info("Creating HTTP request multiplexer")
mux := http.NewServeMux()
http.Handle("/", mux)
glog.Info("Adding prometheus handler on path: /metrics")
http.Handle("/metrics", promhttp.Handler())
glog.Infof("Loading trust anchors from file: %s", *anchorPath)
anchors, err := loadCertificates(*anchorPath)
if err != nil {
glog.Fatalf("no trust anchors: %v", err)
}
glog.Infof("Loading Ed25519 signing key from file: %s", *keyPath)
pem, err := ioutil.ReadFile(*keyPath)
if err != nil {
glog.Fatalf("no signing key: %v", err)
}
signer, err := x509util.NewEd25519PrivateKey(pem)
if err != nil {
glog.Fatalf("no signing key: %v", err)
}
lp, err := stfe.NewLogParameters(*trillianID, *prefix, anchors, signer, *maxRange, *maxChain)
if err != nil {
glog.Fatalf("failed setting up log parameters: %v", err)
}
i := stfe.NewInstance(lp, client, *rpcDeadline)
for _, handler := range i.Handlers() {
glog.Infof("adding handler: %s", handler.Path())
mux.Handle(handler.Path(), handler)
}
glog.Infof("Configured: %s", i)
glog.Infof("Serving on %v/%v", *httpEndpoint, *prefix)
srv := http.Server{Addr: *httpEndpoint}
err = srv.ListenAndServe()
if err != http.ErrServerClosed {
glog.Warningf("Server exited: %v", err)
}
glog.Flush()
}
// loadCertificates loads a non-empty list of PEM-encoded certificates from file
func loadCertificates(path string) ([]*x509.Certificate, error) {
pem, err := ioutil.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("failed reading %s: %v", path, err)
}
anchors, err := x509util.NewCertificateList(pem)
if err != nil {
return nil, fmt.Errorf("failed parsing: %v", err)
}
if len(anchors) == 0 {
return nil, fmt.Errorf("no trust anchors")
}
return anchors, nil
}
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