move marshalSignatures func

sshext.go

@@ -106,16 +106,6 @@ func proveOwnership(signers []ssh.Signer, sessionID []byte, req *ssh.Request) {
  _ = req.Reply(true, marshalSignatures(sigs))
 }
 
-func marshalSignatures(signatures []*ssh.Signature) []byte {
- var buf bytes.Buffer
- for _, s := range signatures {
- raw := ssh.Marshal(s)
- msg := wrapStruct(raw)
- buf.Write(ssh.Marshal(msg))
- }
- return buf.Bytes()
-}
-
 func parsePublicKeys(p []byte) ([]ssh.PublicKey, error) {
  var keys []ssh.PublicKey
  for len(p) > 0 {
@@ -160,3 +150,13 @@ func signHostKey(signer ssh.Signer, key ssh.PublicKey, sessionID []byte) (*ssh.S
  }
  return signer.Sign(rand.Reader, ssh.Marshal(msg))
 }
+
+func marshalSignatures(signatures []*ssh.Signature) []byte {
+ var buf bytes.Buffer
+ for _, s := range signatures {
+ raw := ssh.Marshal(s)
+ msg := wrapStruct(raw)
+ buf.Write(ssh.Marshal(msg))
+ }
+ return buf.Bytes()
+}