initial commit

dialer/sshd/metadata.go

@@ -0,0 +1,43 @@
+package sshd
+
+import (
+	"io/ioutil"
+	"time"
+
+	mdata "github.com/go-gost/gost/v3/pkg/metadata"
+	"golang.org/x/crypto/ssh"
+)
+
+type metadata struct {
+	handshakeTimeout time.Duration
+	signer           ssh.Signer
+}
+
+func (d *sshdDialer) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		handshakeTimeout = "handshakeTimeout"
+		privateKeyFile   = "privateKeyFile"
+		passphrase       = "passphrase"
+	)
+
+	if key := mdata.GetString(md, privateKeyFile); key != "" {
+		data, err := ioutil.ReadFile(key)
+		if err != nil {
+			return err
+		}
+
+		pp := mdata.GetString(md, passphrase)
+		if pp == "" {
+			d.md.signer, err = ssh.ParsePrivateKey(data)
+		} else {
+			d.md.signer, err = ssh.ParsePrivateKeyWithPassphrase(data, []byte(pp))
+		}
+		if err != nil {
+			return err
+		}
+	}
+
+	d.md.handshakeTimeout = mdata.GetDuration(md, handshakeTimeout)
+
+	return
+}