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package main
import (
"context"
"flag"
"fmt"
"encoding/base64"
"net/http"
"github.com/golang/glog"
"github.com/system-transparency/stfe"
"github.com/system-transparency/stfe/client"
)
var (
operators = flag.String("operators", "../../descriptor/stfe.json", "path to json-encoded list of log operators")
logId = flag.String("log_id", "B9oCJk4XIOMXba8dBM5yUj+NLtqTE6xHwbvR9dYkHPM=", "base64-encoded log identifier")
signedTreeHead = flag.String("sth", "AAEgB9oCJk4XIOMXba8dBM5yUj+NLtqTE6xHwbvR9dYkHPMAAAF1jnn7fwAAAAAAAAAxICCqLJn4QWYd0aRIRjDWGf4GWalDIb/iH60jSSX89WgvAAAAQF9XPFRdM56KaelHFFg1RqjTw1yFL085zHhdNkLeZh9BCXxVTByqrHEMngAkY69EX45aJMWh9NymmPau0qoigA8=", "base64-encoded StItem of type StFormatSignedTreeHeadV1")
entry = flag.String("entry", "AAUBOCAsYkIyzdIhdxKU37sxCsoACg32rItmtpbZDvBv3vtkow==", "base64-encoded StItem of type StFormatChecksumV1")
)
func main() {
flag.Parse()
cli, err := client.NewClientFromPath(*logId, "", "", *operators, &http.Client{}, true)
if err != nil {
glog.Fatal(err)
}
var sth stfe.StItem
if err := sth.UnmarshalB64(*signedTreeHead); err != nil {
glog.Fatalf("bad signed tree head: %v", err)
}
if k, err := cli.Log.Key(); err != nil {
glog.Fatalf("bad public key: %v", err)
} else if err := client.VerifySignedTreeHeadV1(&sth, cli.Log.Scheme, k); err != nil {
glog.Fatalf("bad signed tree head: %v", err)
}
glog.V(3).Info("verified sth")
leaf, err := base64.StdEncoding.DecodeString(*entry)
if err != nil {
glog.Fatalf("failed decoding entry: %v", err)
}
proof, err := cli.GetProofByHash(context.Background(), sth.SignedTreeHeadV1.TreeHead.TreeSize, sth.SignedTreeHeadV1.TreeHead.RootHash.Data, leaf)
if err != nil {
glog.Fatalf("get-proof-by-hash failed: %v", err)
}
glog.V(3).Info("verified inclusion proof")
str, err := proof.MarshalB64()
if err != nil {
glog.Fatalf("failed encoding valid inclusion proof: %v", err)
}
fmt.Println(str)
glog.Flush()
}
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