writefreely/keys.go

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/*
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* Copyright © 2018-2019 A Bunch Tell LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
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package writefreely
import (
"github.com/writeas/web-core/log"
"github.com/writeas/writefreely/key"
"io/ioutil"
"os"
"path/filepath"
)
const (
keysDir = "keys"
)
var (
emailKeyPath = filepath.Join(keysDir, "email.aes256")
cookieAuthKeyPath = filepath.Join(keysDir, "cookies_auth.aes256")
cookieKeyPath = filepath.Join(keysDir, "cookies_enc.aes256")
)
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func initKeyPaths(app *App) {
emailKeyPath = filepath.Join(app.cfg.Server.KeysParentDir, emailKeyPath)
cookieAuthKeyPath = filepath.Join(app.cfg.Server.KeysParentDir, cookieAuthKeyPath)
cookieKeyPath = filepath.Join(app.cfg.Server.KeysParentDir, cookieKeyPath)
}
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func initKeys(app *App) error {
var err error
app.keys = &key.Keychain{}
if debugging {
log.Info(" %s", emailKeyPath)
}
app.keys.EmailKey, err = ioutil.ReadFile(emailKeyPath)
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if err != nil {
return err
}
if debugging {
log.Info(" %s", cookieAuthKeyPath)
}
app.keys.CookieAuthKey, err = ioutil.ReadFile(cookieAuthKeyPath)
if err != nil {
return err
}
if debugging {
log.Info(" %s", cookieKeyPath)
}
app.keys.CookieKey, err = ioutil.ReadFile(cookieKeyPath)
if err != nil {
return err
}
return nil
}
// generateKey generates a key at the given path used for the encryption of
// certain user data. Because user data becomes unrecoverable without these
// keys, this won't overwrite any existing key, and instead outputs a message.
func generateKey(path string) error {
// Check if key file exists
if _, err := os.Stat(path); err == nil {
log.Info("%s already exists. rm the file if you understand the consquences.", path)
return nil
} else if !os.IsNotExist(err) {
log.Error("%s", err)
return err
}
log.Info("Generating %s.", path)
b, err := key.GenerateBytes(key.EncKeysBytes)
if err != nil {
log.Error("FAILED. %s. Run writefreely --gen-keys again.", err)
return err
}
err = ioutil.WriteFile(path, b, 0600)
if err != nil {
log.Error("FAILED writing file: %s", err)
return err
}
log.Info("Success.")
return nil
}