toEncode.Auth = encodeDockerConfigFieldAuth(ident.Username, ident.Password)

	return json.Marshal(toEncode)
}

// decodeDockerConfigFieldAuth deserializes the "auth" field from dockercfg into a
// username and a password. The format of the auth field is base64(<username>:<password>).
func decodeDockerConfigFieldAuth(field string) (username, password string, err error) {

	var decoded []byte

	// StdEncoding can only decode padded string