Fix check for encrypted private keys using PassphraseMissingError

Signed-off-by: Hans Rakers <[email protected]>

Author: hrak

cmd/install.go

@@ -314,7 +314,7 @@ func loadPublickey(path string) (ssh.AuthMethod, func() error, error) {
 
 	signer, err := ssh.ParsePrivateKey(key)
 	if err != nil {
-		if err.Error() != "ssh: cannot decode encrypted private keys" {
+		if _, ok := err.(*ssh.PassphraseMissingError); !ok {
 			return nil, noopCloseFunc, fmt.Errorf("unable to parse private key: %s", err.Error())
 		}
 

cmd/install_test.go

@@ -1,13 +1,15 @@
 package cmd
 
 import (
+	"errors"
 	"io/ioutil"
 	"os"
 	"regexp"
 	"strings"
 	"testing"
 
 	"github.com/alexellis/k3sup/pkg/helm"
+	"golang.org/x/crypto/ssh"
 )
 
 // To regenerate:
@@ -45,7 +47,7 @@ kfFJfrUjElq6Bx9oPPxc2vD40gqnYL57A+Y+X+A0kL4fO7pfh2VxOw==
 `
 
 func Test_loadPublickeyEncrypted(t *testing.T) {
-	want := "parse private key with passphrase failed: x509: decryption password incorrect"
+	want := &ssh.PassphraseMissingError{}
 
 	tmpfile, err := ioutil.TempFile("", "key")
 	if err != nil {
@@ -60,7 +62,7 @@ func Test_loadPublickeyEncrypted(t *testing.T) {
 
 	tmpfile.Close()
 	_, _, err = loadPublickey(fileName)
-	if err.Error() != want {
+	if errors.Is(err, want) {
 		t.Fatalf("want: %q, but got: %q", want, err.Error())
 	}
 }