Merge pull request #73 from antoniomika/ed25519_auth

Change host key to ed25519 based auth
antoniomika · Feb 14, 2020 · 6e567f2 · 6e567f2
2 parents 8bcef9c + 837951d
commit 6e567f2
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Showing 3 changed files with 8 additions and 4 deletions.
diff --git a/go.mod b/go.mod
@@ -11,6 +11,7 @@ require (
 	github.com/koding/websocketproxy v0.0.0-20181220232114-7ed82d81a28c
 	github.com/logrusorgru/aurora v0.0.0-20191116043053-66b7ad493a23
 	github.com/mattn/go-isatty v0.0.10 // indirect
+	github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a
 	github.com/oschwald/maxminddb-golang v1.5.0 // indirect
 	github.com/pires/go-proxyproto v0.0.0-20190615163442-2c19fd512994
 	github.com/ugorji/go v1.1.7 // indirect

diff --git a/go.sum b/go.sum
@@ -27,6 +27,8 @@ github.com/logrusorgru/aurora v0.0.0-20191116043053-66b7ad493a23/go.mod h1:7rIyQ
 github.com/mattn/go-isatty v0.0.7/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.10 h1:qxFzApOv4WsAL965uUPIsXzAKCZxN2p9UqdhFS4ZW10=
 github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
+github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a h1:eU8j/ClY2Ty3qdHnn0TyW3ivFoPC/0F1gQZz8yTxbbE=
+github.com/mikesmitty/edkey v0.0.0-20170222072505-3356ea4e686a/go.mod h1:v8eSC2SMp9/7FTKUncp7fH9IwPfw+ysMObcEz5FWheQ=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=

diff --git a/utils.go b/utils.go
@@ -2,8 +2,8 @@ package main
 
 import (
 	"bytes"
+	"crypto/ed25519"
 	"crypto/rand"
-	"crypto/rsa"
 	"crypto/x509"
 	"encoding/pem"
 	"fmt"
@@ -21,6 +21,7 @@ import (
 
 	"github.com/fsnotify/fsnotify"
 	"github.com/logrusorgru/aurora"
+	"github.com/mikesmitty/edkey"
 	"golang.org/x/crypto/ssh"
 )
 
@@ -226,16 +227,16 @@ func getSSHConfig() *ssh.ServerConfig {
 }
 
 func generatePrivateKey(passphrase string) []byte {
-	pk, err := rsa.GenerateKey(rand.Reader, 2048)
+	_, pk, err := ed25519.GenerateKey(rand.Reader)
 	if err != nil {
 		log.Fatal(err)
 	}
 
 	log.Println("Generated RSA Keypair")
 
 	pemBlock := &pem.Block{
-		Type:  "RSA PRIVATE KEY",
-		Bytes: x509.MarshalPKCS1PrivateKey(pk),
+		Type:  "OPENSSH PRIVATE KEY",
+		Bytes: edkey.MarshalED25519PrivateKey(pk),
 	}
 
 	var pemData []byte