package common

import (
	gossh "code.google.com/p/go.crypto/ssh"
	"io/ioutil"
	"os"

	"github.com/mitchellh/packer/communicator/ssh"
)

func sshKeyToKeyring(path string) (gossh.ClientKeyring, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer f.Close()

	keyBytes, err := ioutil.ReadAll(f)
	if err != nil {
		return nil, err
	}

	keyring := new(ssh.SimpleKeychain)
	if err := keyring.AddPEMKey(string(keyBytes)); err != nil {
		return nil, err
	}

	return keyring, nil
}