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prompt_darwin.go
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/
prompt_darwin.go
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// Copyright 2020 Google LLC
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
package main
import (
"bytes"
"encoding/json"
"fmt"
"os/exec"
"text/template"
)
var scriptTemplate = template.Must(template.New("script").Parse(`
var app = Application.currentApplication()
app.includeStandardAdditions = true
app.displayDialog(
"YubiKey serial number: {{ .Serial }} " +
"({{ .Tries }} tries remaining)\n\n" +
"Please enter your PIN:", {
defaultAnswer: "",
withTitle: "yubikey-agent PIN prompt",
buttons: ["Cancel", "OK"],
defaultButton: "OK",
cancelButton: "Cancel",
hiddenAnswer: true,
})`))
func getPIN(serial uint32, retries int) (string, error) {
script := new(bytes.Buffer)
if err := scriptTemplate.Execute(script, map[string]interface{}{
"Serial": serial, "Tries": retries,
}); err != nil {
return "", err
}
c := exec.Command("osascript", "-s", "se", "-l", "JavaScript")
c.Stdin = script
out, err := c.Output()
if err != nil {
return "", fmt.Errorf("failed to execute osascript: %v", err)
}
var x struct {
PIN string `json:"textReturned"`
}
if err := json.Unmarshal(out, &x); err != nil {
return "", fmt.Errorf("failed to parse osascript output: %v", err)
}
return x.PIN, nil
}