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package main
import (
"bytes"
"crypto/ed25519"
"encoding/hex"
"flag"
"fmt"
"log"
"net/http"
"golang.sigsum.org/sigsum-log-go/pkg/types"
)
var (
url = flag.String("url", "http://localhost:6965/sigsum/v0", "base url")
sk = flag.String("sk", "e1d7c494dacb0ddf809a17e4528b01f584af22e3766fa740ec52a1711c59500d711090dd2286040b50961b0fe09f58aa665ccee5cb7ee042d819f18f6ab5046b", "witness secret key (hex)")
log_vk = flag.String("log_vk", "cc0e7294a9d002c33aaa828efba6622ab1ce8ebdb8a795902555c2813133cfe8", "log public key (hex)")
)
func main() {
log_vk, err := hex.DecodeString(*log_vk)
if err != nil {
log.Fatalf("DecodeString: %v", err)
}
priv, err := hex.DecodeString(*sk)
if err != nil {
log.Fatalf("DecodeString: %v", err)
}
sk := ed25519.PrivateKey(priv)
vk := sk.Public().(ed25519.PublicKey)
fmt.Printf("sk: %x\nvk: %x\n", sk, vk)
rsp, err := http.Get(*url + "/get-tree-head-to-sign")
if err != nil {
log.Fatalf("Get: %v", err)
}
var sth types.SignedTreeHead
if err := sth.UnmarshalASCII(rsp.Body); err != nil {
log.Fatalf("UnmarshalASCII: %v", err)
}
sth.TreeHead.KeyHash = types.Hash(log_vk)
fmt.Printf("%+v\n\n", sth)
msg := sth.TreeHead.Marshal()
sig := ed25519.Sign(sk, msg)
sigident := &types.SigIdent{
KeyHash: types.Hash(vk[:]),
Signature: &[types.SignatureSize]byte{},
}
copy(sigident.Signature[:], sig)
buf := bytes.NewBuffer(nil)
if err := sigident.MarshalASCII(buf); err != nil {
log.Fatalf("MarshalASCII: %v", err)
}
rsp, err = http.Post(*url+"/add-cosignature", "type/sigsum", buf)
if err != nil {
log.Fatalf("Post: %v", err)
}
fmt.Printf("Status: %v\n", rsp.StatusCode)
}
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