1 files changed, 56 insertions, 0 deletions
diff --git a/client/cmd/cosign/main.go b/client/cmd/cosign/main.go
new file mode 100644
index 0000000..e86842b
--- /dev/null
+++ b/client/cmd/cosign/main.go
@@ -0,0 +1,56 @@
+package main
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"encoding/hex"
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/system-transparency/stfe/types"
+)
+
+var (
+	url = flag.String("url", "http://localhost:6965/st/v0", "base url")
+	sk  = flag.String("sk", "e1d7c494dacb0ddf809a17e4528b01f584af22e3766fa740ec52a1711c59500d711090dd2286040b50961b0fe09f58aa665ccee5cb7ee042d819f18f6ab5046b", "hex key")
+)
+
+func main() {
+	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)
+	}
+	fmt.Printf("%+v\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/stfe", buf)
+	if err != nil {
+		log.Fatalf("Post: %v", err)
+	}
+	fmt.Printf("Status: %v\n", rsp.StatusCode)
+}