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editor.go
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editor.go
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// Copyright 2018 Keybase Inc. All rights reserved.
// Use of this source code is governed by a BSD
// license that can be found in the LICENSE file.
package main
import (
"errors"
"fmt"
"os"
"strings"
"github.com/keybase/client/go/kbfs/libpages/config"
"github.com/keybase/client/go/minterm"
)
func newKBPConfigEditorWithPrompter(kbpConfigDir string, p prompter) (
*kbpConfigEditor, error) {
kbpConfigPath, err := kbpConfigPath(kbpConfigDir)
if err != nil {
return nil, err
}
editor := &kbpConfigEditor{kbpConfigPath: kbpConfigPath, prompter: p}
f, err := os.Open(kbpConfigPath)
switch {
case err == nil:
var cfg config.Config
cfg, editor.originalConfigStr, err = readConfigAndClose(f)
if err != nil {
return nil, fmt.Errorf(
"reading config file %s error: %v", kbpConfigPath, err)
}
switch cfg.Version() {
case config.Version1:
editor.kbpConfig = cfg.(*config.V1)
needsUpgrade, err := editor.kbpConfig.HasBcryptPasswords()
if err != nil {
return nil, err
}
if needsUpgrade {
return nil, errors.New(
"config has bcrypt password hashes. Please run " +
"`kbpagesconfig upgrade` to migrate to sha256")
}
default:
return nil, fmt.Errorf(
"unsupported config version %s", cfg.Version())
}
case os.IsNotExist(err):
editor.kbpConfig = config.DefaultV1()
default:
return nil, fmt.Errorf(
"open file %s error: %v", kbpConfigPath, err)
}
return editor, nil
}
func newKBPConfigEditor(kbpConfigDir string) (*kbpConfigEditor, error) {
term, err := minterm.New()
if err != nil {
return nil, fmt.Errorf("opening terminal error: %s", err)
}
return newKBPConfigEditorWithPrompter(kbpConfigDir, term)
}
func (e *kbpConfigEditor) confirmAndWrite() error {
if err := e.kbpConfig.Validate(); err != nil {
return fmt.Errorf("new config would not be valid: %v", err)
}
return confirmAndWrite(
e.originalConfigStr, e.kbpConfig, e.kbpConfigPath, e.prompter)
}
func (e *kbpConfigEditor) setUser(username string, isAdd bool) error {
_, userExists := e.kbpConfig.Users[username]
if userExists && isAdd {
return fmt.Errorf("user %s already exists", username)
}
if !userExists && !isAdd {
return fmt.Errorf("user %s doesn't exist", username)
}
confirmedRandom, err := promptConfirm(e.prompter, fmt.Sprintf(
"We can generate a random password for %s, or you can enter "+
"a password. Since we use a fast hash function for password "+
"hashing, we recommend generating random passwords with enough "+
"entropy. Would you like to generate a random password now "+
"(recommended)?", username), true)
if err != nil {
return fmt.Errorf("getting confirmation error: %v", err)
}
var password string
if confirmedRandom {
password, err = generateRandomPassword()
if err != nil {
return fmt.Errorf("generating random password error: %v", err)
}
confirmed, err := promptConfirm(e.prompter, fmt.Sprintf(
"Here's the password for %s:\n\n\t%s\n\n"+
"This is the only time you'll see it, so please write it "+
"down or give it to %s. Continue?",
username, password, username), false)
if err != nil {
return fmt.Errorf("getting confirmation error: %v", err)
}
if !confirmed {
return errors.New("not confirmed")
}
} else {
input, err := e.prompter.PromptPassword(fmt.Sprintf(
"enter a password for %s: ", username))
if err != nil {
return fmt.Errorf("getting password error: %v", err)
}
password = strings.TrimSpace(input)
if len(password) == 0 {
return fmt.Errorf("empty password")
}
}
hashed, err := config.GenerateSHA256PasswordHash(password)
if err != nil {
return err
}
if e.kbpConfig.Users == nil {
e.kbpConfig.Users = make(map[string]string)
}
e.kbpConfig.Users[username] = (hashed)
return nil
}
func (e *kbpConfigEditor) removeUser(username string) {
delete(e.kbpConfig.Users, username)
}
func (e *kbpConfigEditor) setFieldSimple(pathStr string, setter func(c *config.PerPathConfigV1)) error {
if e.kbpConfig.PerPathConfigs == nil {
e.kbpConfig.PerPathConfigs = make(map[string]config.PerPathConfigV1)
}
pathPerPathConfig := e.kbpConfig.PerPathConfigs[pathStr]
setter(&pathPerPathConfig)
e.kbpConfig.PerPathConfigs[pathStr] = pathPerPathConfig
return e.kbpConfig.Validate()
}
func (e *kbpConfigEditor) setAnonymousPermission(
permsStr string, pathStr string) error {
return e.setFieldSimple(pathStr, func(c *config.PerPathConfigV1) {
c.AnonymousPermissions = permsStr
})
}
func (e *kbpConfigEditor) clearPerPathConfig(pathStr string) {
delete(e.kbpConfig.PerPathConfigs, pathStr)
}
func (e *kbpConfigEditor) setAdditionalPermission(
username string, permsStr string, pathStr string) error {
if e.kbpConfig.PerPathConfigs == nil {
e.kbpConfig.PerPathConfigs = make(map[string]config.PerPathConfigV1)
}
pathPerPathConfig := e.kbpConfig.PerPathConfigs[pathStr]
if pathPerPathConfig.WhitelistAdditionalPermissions == nil {
// If permsStr is empty, we'd leave an empty permission entry behind.
// But that's OK since it doesn't change any behavior, i.e., no
// additional permission is granted for the user on the path. If user
// really wants the entry gone, they can use the "remove" command.
pathPerPathConfig.WhitelistAdditionalPermissions = make(map[string]string)
}
pathPerPathConfig.WhitelistAdditionalPermissions[username] = permsStr
e.kbpConfig.PerPathConfigs[pathStr] = pathPerPathConfig
return e.kbpConfig.Validate()
}
func (e *kbpConfigEditor) removeUserPermissionsFromPerPathConfig(
username string, pathStr string) {
if e.kbpConfig.PerPathConfigs == nil {
return
}
if e.kbpConfig.PerPathConfigs[pathStr].WhitelistAdditionalPermissions == nil {
return
}
delete(e.kbpConfig.PerPathConfigs[pathStr].WhitelistAdditionalPermissions, username)
}
func (e *kbpConfigEditor) getUserPermissionsOnPath(
username string, pathStr string) (read, list bool, err error) {
read, list, _, _, _, err = e.kbpConfig.GetPermissions(
pathStr, &username)
return read, list, err
}
func (e *kbpConfigEditor) setAccessControlAllowOrigin(
pathStr string, acao string) error {
return e.setFieldSimple(pathStr, func(c *config.PerPathConfigV1) {
c.AccessControlAllowOrigin = acao
})
}
func (e *kbpConfigEditor) set403(
pathStr string, p string) error {
return e.setFieldSimple(pathStr, func(c *config.PerPathConfigV1) {
c.Custom403Forbidden = p
})
}
func (e *kbpConfigEditor) set404(
pathStr string, p string) error {
return e.setFieldSimple(pathStr, func(c *config.PerPathConfigV1) {
c.Custom404NotFound = p
})
}