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Two factor authentication support (#630)

Browse source 
* Initial commit for 2FA support

Signed-off-by: Andrew <write@imaginarycode.com>

* Add vendored files

* Add missing depends

* A few clean ups

* Added improvements, proper encryption

* Better encryption key

* Simplify "key" generation

* Make 2FA enrollment page more robust

* Fix typo

* Rename twofa/2FA to TwoFactor

* UNIQUE INDEX -> UNIQUE
This commit is contained in:
Andrew 2017-01-15 21:14:29 -05:00 committed by Lunny Xiao
parent 64375d875b
commit 6dd096b7f0
40 changed files with 3395 additions and 8 deletions
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13
cmd/web.go
View file

@ -203,6 +203,12 @@ func runWeb(ctx *cli.Context) error {
m.Post("/sign_up", bindIgnErr(auth.RegisterForm{}), user.SignUpPost)
m.Get("/reset_password", user.ResetPasswd)
m.Post("/reset_password", user.ResetPasswdPost)
m.Group("/two_factor", func() {
m.Get("", user.TwoFactor)
m.Post("", bindIgnErr(auth.TwoFactorAuthForm{}), user.TwoFactorPost)
m.Get("/scratch", user.TwoFactorScratch)
m.Post("/scratch", bindIgnErr(auth.TwoFactorScratchAuthForm{}), user.TwoFactorScratchPost)
})
}, reqSignOut)
m.Group("/user/settings", func() {
@ -223,6 +229,13 @@ func runWeb(ctx *cli.Context) error {
Post(bindIgnErr(auth.NewAccessTokenForm{}), user.SettingsApplicationsPost)
m.Post("/applications/delete", user.SettingsDeleteApplication)
m.Route("/delete", "GET,POST", user.SettingsDelete)
m.Group("/two_factor", func() {
m.Get("", user.SettingsTwoFactor)
m.Post("/regenerate_scratch", user.SettingsTwoFactorRegenerateScratch)
m.Post("/disable", user.SettingsTwoFactorDisable)
m.Get("/enroll", user.SettingsTwoFactorEnroll)
m.Post("/enroll", bindIgnErr(auth.TwoFactorAuthForm{}), user.SettingsTwoFactorEnrollPost)
})
}, reqSignIn, func(ctx *context.Context) {
ctx.Data["PageIsUserSettings"] = true
})

19
models/error.go
View file

@ -787,6 +787,25 @@ func (err ErrTeamAlreadyExist) Error() string {
return fmt.Sprintf("team already exists [org_id: %d, name: %s]", err.OrgID, err.Name)
}
//
// Two-factor authentication
//
// ErrTwoFactorNotEnrolled indicates that a user is not enrolled in two-factor authentication.
type ErrTwoFactorNotEnrolled struct {
UID int64
}
// IsErrTwoFactorNotEnrolled checks if an error is a ErrTwoFactorNotEnrolled.
func IsErrTwoFactorNotEnrolled(err error) bool {
_, ok := err.(ErrTwoFactorNotEnrolled)
return ok
}
func (err ErrTwoFactorNotEnrolled) Error() string {
return fmt.Sprintf("user not enrolled in 2FA [uid: %d]", err.UID)
}
// ____ ___ .__ .___
// | | \______ | | _________ __| _/
// | | /\____ \| | / _ \__ \ / __ |

1
models/models.go
View file

@ -105,6 +105,7 @@ func init() {
new(Notification),
new(IssueUser),
new(LFSMetaObject),
new(TwoFactor),
)
gonicNames := []string{"SSL", "UID"}

141
models/twofactor.go Normal file
View file

@ -0,0 +1,141 @@
// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"crypto/md5"
"crypto/subtle"
"encoding/base64"
"time"
"github.com/Unknwon/com"
"github.com/go-xorm/xorm"
"github.com/pquerna/otp/totp"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/setting"
)
// TwoFactor represents a two-factor authentication token.
type TwoFactor struct {
ID int64 `xorm:"pk autoincr"`
UID int64 `xorm:"UNIQUE"`
Secret string
ScratchToken string
Created time.Time `xorm:"-"`
CreatedUnix int64 `xorm:"INDEX"`
Updated time.Time `xorm:"-"` // Note: Updated must below Created for AfterSet.
UpdatedUnix int64 `xorm:"INDEX"`
}
// BeforeInsert will be invoked by XORM before inserting a record representing this object.
func (t *TwoFactor) BeforeInsert() {
t.CreatedUnix = time.Now().Unix()
}
// BeforeUpdate is invoked from XORM before updating this object.
func (t *TwoFactor) BeforeUpdate() {
t.UpdatedUnix = time.Now().Unix()
}
// AfterSet is invoked from XORM after setting the value of a field of this object.
func (t *TwoFactor) AfterSet(colName string, _ xorm.Cell) {
switch colName {
case "created_unix":
t.Created = time.Unix(t.CreatedUnix, 0).Local()
case "updated_unix":
t.Updated = time.Unix(t.UpdatedUnix, 0).Local()
}
}
// GenerateScratchToken recreates the scratch token the user is using.
func (t *TwoFactor) GenerateScratchToken() error {
token, err := base.GetRandomString(8)
if err != nil {
return err
}
t.ScratchToken = token
return nil
}
// VerifyScratchToken verifies if the specified scratch token is valid.
func (t *TwoFactor) VerifyScratchToken(token string) bool {
if len(token) == 0 {
return false
}
return subtle.ConstantTimeCompare([]byte(token), []byte(t.ScratchToken)) == 1
}
func (t *TwoFactor) getEncryptionKey() []byte {
k := md5.Sum([]byte(setting.SecretKey))
return k[:]
}
// SetSecret sets the 2FA secret.
func (t *TwoFactor) SetSecret(secret string) error {
secretBytes, err := com.AESEncrypt(t.getEncryptionKey(), []byte(secret))
if err != nil {
return err
}
t.Secret = base64.StdEncoding.EncodeToString(secretBytes)
return nil
}
// ValidateTOTP validates the provided passcode.
func (t *TwoFactor) ValidateTOTP(passcode string) (bool, error) {
decodedStoredSecret, err := base64.StdEncoding.DecodeString(t.Secret)
if err != nil {
return false, err
}
secret, err := com.AESDecrypt(t.getEncryptionKey(), decodedStoredSecret)
if err != nil {
return false, err
}
secretStr := string(secret)
return totp.Validate(passcode, secretStr), nil
}
// NewTwoFactor creates a new two-factor authentication token.
func NewTwoFactor(t *TwoFactor) error {
err := t.GenerateScratchToken()
if err != nil {
return err
}
_, err = x.Insert(t)
return err
}
// UpdateTwoFactor updates a two-factor authentication token.
func UpdateTwoFactor(t *TwoFactor) error {
_, err := x.Id(t.ID).AllCols().Update(t)
return err
}
// GetTwoFactorByUID returns the two-factor authentication token associated with
// the user, if any.
func GetTwoFactorByUID(uid int64) (*TwoFactor, error) {
twofa := &TwoFactor{UID: uid}
has, err := x.Get(twofa)
if err != nil {
return nil, err
} else if !has {
return nil, ErrTwoFactorNotEnrolled{uid}
}
return twofa, nil
}
// DeleteTwoFactorByID deletes two-factor authentication token by given ID.
func DeleteTwoFactorByID(id, userID int64) error {
cnt, err := x.Id(id).Delete(&TwoFactor{
UID: userID,
})
if err != nil {
return err
} else if cnt != 1 {
return ErrTwoFactorNotEnrolled{userID}
}
return nil
}

20
modules/auth/user_form.go
View file

@ -173,3 +173,23 @@ type NewAccessTokenForm struct {
func (f *NewAccessTokenForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// TwoFactorAuthForm for logging in with 2FA token.
type TwoFactorAuthForm struct {
Passcode string `binding:"Required"`
}
// Validate valideates the fields
func (f *TwoFactorAuthForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// TwoFactorScratchAuthForm for logging in with 2FA scratch token.
type TwoFactorScratchAuthForm struct {
Token string `binding:"Required"`
}
// Validate valideates the fields
func (f *TwoFactorScratchAuthForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

27
options/locale/locale_en-US.ini
View file

@ -23,6 +23,9 @@ email = Email
password = Password
re_type = Re-Type
captcha = Captcha
twofa = Two-factor authentication
twofa_scratch = Two-factor scratch code
passcode = Passcode
repository = Repository
organization = Organization
@ -175,6 +178,12 @@ invalid_code = Sorry, your confirmation code has expired or not valid.
reset_password_helper = Click here to reset your password
password_too_short = Password length cannot be less then %d.
non_local_account = Non-local accounts cannot change passwords through Gitea.
verify = Verify
scratch_code = Scratch code
use_scratch_code = Use a scratch code
twofa_scratch_used = You have used your scratch code. You have been redirected to the two-factor settings page so you may remove your device enrollment or generate a new scratch code.
twofa_passcode_incorrect = Your passcode is not correct. If you misplaced your device, use your scratch code.
twofa_scratch_token_incorrect = Your scratch code is not correct.
[mail]
activate_account = Please activate your account
@ -266,6 +275,7 @@ social = Social Accounts
applications = Applications
orgs = Organizations
delete = Delete Account
twofa = Two-Factor Authentication
uid = Uid
public_profile = Public Profile
@ -351,6 +361,23 @@ access_token_deletion = Personal Access Token Deletion
access_token_deletion_desc = Delete this personal access token will remove all related accesses of application. Do you want to continue?
delete_token_success = Personal access token has been removed successfully! Don't forget to update your application as well.
twofa_desc = Gitea supports two-factor authentication to provide additional security for your account.
twofa_is_enrolled = Your account is <strong>enrolled</strong> into two-factor authentication.
twofa_not_enrolled = Your account is not currently enrolled into two-factor authentication.
twofa_disable = Disable two-factor authentication
twofa_scratch_token_regenerate = Regenerate scratch token
twofa_scratch_token_regenerated = Your scratch token has been regenerated. It is now %s. Keep it in a safe place.
twofa_enroll = Enroll into two-factor authentication
twofa_disable_note = If needed, you can disable two-factor authentication.
twofa_disable_desc = Disabling two-factor authentication will make your account less secure. Are you sure you want to proceed?
regenerate_scratch_token_desc = If you misplaced your scratch token, or had to use it to log in, you can reset it.
twofa_disabled = Two-factor authentication has been disabled.
scan_this_image = Scan this image with your authentication application:
or_enter_secret = Or enter the secret: %s
then_enter_passcode = Then enter the passcode the application gives you:
passcode_invalid = That passcode is invalid. Try again.
twofa_enrolled = Your account has now been enrolled in two-factor authentication. Make sure to save your scratch token (%s), as it will only be shown once!
delete_account = Delete Your Account
delete_prompt = The operation will delete your account permanently, and <strong>CANNOT</strong> be undone!
confirm_delete_account = Confirm Deletion

177
routers/user/auth.go
View file

@ -5,6 +5,7 @@
package user
import (
"errors"
"fmt"
"net/url"
@ -27,6 +28,8 @@ const (
TplActivate base.TplName = "user/auth/activate"
tplForgotPassword base.TplName = "user/auth/forgot_passwd"
tplResetPassword base.TplName = "user/auth/reset_passwd"
tplTwofa base.TplName = "user/auth/twofa"
tplTwofaScratch base.TplName = "user/auth/twofa_scratch"
)
// AutoSignIn reads cookie and try to auto-login.
@ -69,15 +72,12 @@ func AutoSignIn(ctx *context.Context) (bool, error) {
return true, nil
}
// SignIn render sign in page
func SignIn(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("sign_in")
func checkAutoLogin(ctx *context.Context) bool {
// Check auto-login.
isSucceed, err := AutoSignIn(ctx)
if err != nil {
ctx.Handle(500, "AutoSignIn", err)
return
return true
}
redirectTo := ctx.Query("redirect_to")
@ -94,6 +94,18 @@ func SignIn(ctx *context.Context) {
} else {
ctx.Redirect(setting.AppSubURL + "/")
}
return true
}
return false
}
// SignIn render sign in page
func SignIn(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("sign_in")
// Check auto-login.
if checkAutoLogin(ctx) {
return
}
@ -119,13 +131,158 @@ func SignInPost(ctx *context.Context, form auth.SignInForm) {
return
}
if form.Remember {
// If this user is enrolled in 2FA, we can't sign the user in just yet.
// Instead, redirect them to the 2FA authentication page.
_, err = models.GetTwoFactorByUID(u.ID)
if err != nil {
if models.IsErrTwoFactorNotEnrolled(err) {
handleSignIn(ctx, u, form.Remember)
} else {
ctx.Handle(500, "UserSignIn", err)
}
return
}
// User needs to use 2FA, save data and redirect to 2FA page.
ctx.Session.Set("twofaUid", u.ID)
ctx.Session.Set("twofaRemember", form.Remember)
ctx.Redirect(setting.AppSubURL + "/user/two_factor")
}
// TwoFactor shows the user a two-factor authentication page.
func TwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("twofa")
// Check auto-login.
if checkAutoLogin(ctx) {
return
}
// Ensure user is in a 2FA session.
if ctx.Session.Get("twofaUid") == nil {
ctx.Handle(500, "UserSignIn", errors.New("not in 2FA session"))
return
}
ctx.HTML(200, tplTwofa)
}
// TwoFactorPost validates a user's two-factor authentication token.
func TwoFactorPost(ctx *context.Context, form auth.TwoFactorAuthForm) {
ctx.Data["Title"] = ctx.Tr("twofa")
// Ensure user is in a 2FA session.
idSess := ctx.Session.Get("twofaUid")
if idSess == nil {
ctx.Handle(500, "UserSignIn", errors.New("not in 2FA session"))
return
}
id := idSess.(int64)
twofa, err := models.GetTwoFactorByUID(id)
if err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
// Validate the passcode with the stored TOTP secret.
ok, err := twofa.ValidateTOTP(form.Passcode)
if err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
if ok {
remember := ctx.Session.Get("twofaRemember").(bool)
u, err := models.GetUserByID(id)
if err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
handleSignIn(ctx, u, remember)
return
}
ctx.RenderWithErr(ctx.Tr("auth.twofa_passcode_incorrect"), tplTwofa, auth.TwoFactorAuthForm{})
}
// TwoFactorScratch shows the scratch code form for two-factor authentication.
func TwoFactorScratch(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("twofa_scratch")
// Check auto-login.
if checkAutoLogin(ctx) {
return
}
// Ensure user is in a 2FA session.
if ctx.Session.Get("twofaUid") == nil {
ctx.Handle(500, "UserSignIn", errors.New("not in 2FA session"))
return
}
ctx.HTML(200, tplTwofaScratch)
}
// TwoFactorScratchPost validates and invalidates a user's two-factor scratch token.
func TwoFactorScratchPost(ctx *context.Context, form auth.TwoFactorScratchAuthForm) {
ctx.Data["Title"] = ctx.Tr("twofa_scratch")
// Ensure user is in a 2FA session.
idSess := ctx.Session.Get("twofaUid")
if idSess == nil {
ctx.Handle(500, "UserSignIn", errors.New("not in 2FA session"))
return
}
id := idSess.(int64)
twofa, err := models.GetTwoFactorByUID(id)
if err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
// Validate the passcode with the stored TOTP secret.
if twofa.VerifyScratchToken(form.Token) {
// Invalidate the scratch token.
twofa.ScratchToken = ""
if err = models.UpdateTwoFactor(twofa); err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
remember := ctx.Session.Get("twofaRemember").(bool)
u, err := models.GetUserByID(id)
if err != nil {
ctx.Handle(500, "UserSignIn", err)
return
}
handleSignInFull(ctx, u, remember, false)
ctx.Flash.Info(ctx.Tr("auth.twofa_scratch_used"))
ctx.Redirect(setting.AppSubURL + "/user/settings/two_factor")
return
}
ctx.RenderWithErr(ctx.Tr("auth.twofa_scratch_token_incorrect"), tplTwofaScratch, auth.TwoFactorScratchAuthForm{})
}
// This handles the final part of the sign-in process of the user.
func handleSignIn(ctx *context.Context, u *models.User, remember bool) {
handleSignInFull(ctx, u, remember, true)
}
func handleSignInFull(ctx *context.Context, u *models.User, remember bool, obeyRedirect bool) {
if remember {
days := 86400 * setting.LogInRememberDays
ctx.SetCookie(setting.CookieUserName, u.Name, days, setting.AppSubURL)
ctx.SetSuperSecureCookie(base.EncodeMD5(u.Rands+u.Passwd),
setting.CookieRememberName, u.Name, days, setting.AppSubURL)
}
ctx.Session.Delete("twofaUid")
ctx.Session.Delete("twofaRemember")
ctx.Session.Set("uid", u.ID)
ctx.Session.Set("uname", u.Name)
@ -141,11 +298,15 @@ func SignInPost(ctx *context.Context, form auth.SignInForm) {
if redirectTo, _ := url.QueryUnescape(ctx.GetCookie("redirect_to")); len(redirectTo) > 0 {
ctx.SetCookie("redirect_to", "", -1, setting.AppSubURL)
ctx.Redirect(redirectTo)
if obeyRedirect {
ctx.Redirect(redirectTo)
}
return
}
ctx.Redirect(setting.AppSubURL + "/")
if obeyRedirect {
ctx.Redirect(setting.AppSubURL + "/")
}
}
// SignOut sign out from login status

194
routers/user/setting.go
View file

@ -5,12 +5,19 @@
package user
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"strings"
"github.com/Unknwon/com"
"github.com/pquerna/otp"
"github.com/pquerna/otp/totp"
"encoding/base64"
"html/template"
"image/png"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth"
@ -28,6 +35,8 @@ const (
tplSettingsSSHKeys base.TplName = "user/settings/sshkeys"
tplSettingsSocial base.TplName = "user/settings/social"
tplSettingsApplications base.TplName = "user/settings/applications"
tplSettingsTwofa base.TplName = "user/settings/twofa"
tplSettingsTwofaEnroll base.TplName = "user/settings/twofa_enroll"
tplSettingsDelete base.TplName = "user/settings/delete"
tplSecurity base.TplName = "user/security"
)
@ -437,6 +446,191 @@ func SettingsDeleteApplication(ctx *context.Context) {
})
}
// SettingsTwoFactor renders the 2FA page.
func SettingsTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsTwofa"] = true
enrolled := true
_, err := models.GetTwoFactorByUID(ctx.User.ID)
if err != nil {
if models.IsErrTwoFactorNotEnrolled(err) {
enrolled = false
} else {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
}
ctx.Data["TwofaEnrolled"] = enrolled
ctx.HTML(200, tplSettingsTwofa)
}
// SettingsTwoFactorRegenerateScratch regenerates the user's 2FA scratch code.
func SettingsTwoFactorRegenerateScratch(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsTwofa"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err = t.GenerateScratchToken(); err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err = models.UpdateTwoFactor(t); err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_scratch_token_regenerated", t.ScratchToken))
ctx.Redirect(setting.AppSubURL + "/user/settings/two_factor")
}
// SettingsTwoFactorDisable deletes the user's 2FA settings.
func SettingsTwoFactorDisable(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsTwofa"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err = models.DeleteTwoFactorByID(t.ID, ctx.User.ID); err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_disabled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/two_factor")
}
func twofaGenerateSecretAndQr(ctx *context.Context) bool {
var otpKey *otp.Key
var err error
uri := ctx.Session.Get("twofaUri")
if uri != nil {
otpKey, err = otp.NewKeyFromURL(uri.(string))
}
if otpKey == nil {
err = nil // clear the error, in case the URL was invalid
otpKey, err = totp.Generate(totp.GenerateOpts{
Issuer: setting.AppName,
AccountName: ctx.User.Name,
})
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return false
}
}
ctx.Data["TwofaSecret"] = otpKey.Secret()
img, err := otpKey.Image(320, 240)
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return false
}
var imgBytes bytes.Buffer
if err = png.Encode(&imgBytes, img); err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return false
}
ctx.Data["QrUri"] = template.URL("data:image/png;base64," + base64.StdEncoding.EncodeToString(imgBytes.Bytes()))
ctx.Session.Set("twofaSecret", otpKey.Secret())
ctx.Session.Set("twofaUri", otpKey.String())
return true
}
// SettingsTwoFactorEnroll shows the page where the user can enroll into 2FA.
func SettingsTwoFactorEnroll(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsTwofa"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if t != nil {
// already enrolled
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err != nil && !models.IsErrTwoFactorNotEnrolled(err) {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.HTML(200, tplSettingsTwofaEnroll)
}
// SettingsTwoFactorEnrollPost handles enrolling the user into 2FA.
func SettingsTwoFactorEnrollPost(ctx *context.Context, form auth.TwoFactorAuthForm) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsTwofa"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if t != nil {
// already enrolled
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err != nil && !models.IsErrTwoFactorNotEnrolled(err) {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if ctx.HasError() {
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.HTML(200, tplSettingsTwofaEnroll)
return
}
secret := ctx.Session.Get("twofaSecret").(string)
if !totp.Validate(form.Passcode, secret) {
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.Flash.Error(ctx.Tr("settings.passcode_invalid"))
ctx.HTML(200, tplSettingsTwofaEnroll)
return
}
t = &models.TwoFactor{
UID: ctx.User.ID,
}
err = t.SetSecret(secret)
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
err = t.GenerateScratchToken()
if err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
if err = models.NewTwoFactor(t); err != nil {
ctx.Handle(500, "SettingsTwoFactor", err)
return
}
ctx.Session.Delete("twofaSecret")
ctx.Session.Delete("twofaUri")
ctx.Flash.Success(ctx.Tr("settings.twofa_enrolled", t.ScratchToken))
ctx.Redirect(setting.AppSubURL + "/user/settings/two_factor")
}
// SettingsDelete render user suicide page and response for delete user himself
func SettingsDelete(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")

27
templates/user/auth/twofa.tmpl Normal file
View file

@ -0,0 +1,27 @@
{{template "base/head" .}}
<div class="user signin">
<div class="ui middle very relaxed page grid">
<div class="column">
<form class="ui form" action="{{.Link}}" method="post">
{{.CsrfTokenHtml}}
<h3 class="ui top attached header">
{{.i18n.Tr "twofa"}}
</h3>
<div class="ui attached segment">
{{template "base/alert" .}}
<div class="required inline field">
<label for="passcode">{{.i18n.Tr "passcode"}}</label>
<input id="passcode" name="passcode" type="text" autocomplete="off" required>
</div>
<div class="inline field">
<label></label>
<button class="ui green button">{{.i18n.Tr "auth.verify"}}</button>
<a href="{{AppSubUrl}}/user/two_factor/scratch">{{.i18n.Tr "auth.use_scratch_code" | Str2html}}</a>
</div>
</div>
</form>
</div>
</div>
</div>
{{template "base/footer" .}}

26
templates/user/auth/twofa_scratch.tmpl Normal file
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@ -0,0 +1,26 @@
{{template "base/head" .}}
<div class="user signin">
<div class="ui middle very relaxed page grid">
<div class="column">
<form class="ui form" action="{{.Link}}" method="post">
{{.CsrfTokenHtml}}
<h3 class="ui top attached header">
{{.i18n.Tr "twofa_scratch"}}
</h3>
<div class="ui attached segment">
{{template "base/alert" .}}
<div class="required inline field">
<label for="token">{{.i18n.Tr "auth.scratch_code"}}</label>
<input id="token" name="token" type="text" autocomplete="off" required>
</div>
<div class="inline field">
<label></label>
<button class="ui green button">{{.i18n.Tr "auth.verify"}}</button>
</div>
</div>
</form>
</div>
</div>
</div>
{{template "base/footer" .}}

3
templates/user/settings/navbar.tmpl
View file

@ -19,6 +19,9 @@
<a class="{{if .PageIsSettingsApplications}}active{{end}} item" href="{{AppSubUrl}}/user/settings/applications">
{{.i18n.Tr "settings.applications"}}
</a>
<a class="{{if .PageIsSettingsTwofa}}active{{end}} item" href="{{AppSubUrl}}/user/settings/two_factor">
{{.i18n.Tr "settings.twofa"}}
</a>
<a class="{{if .PageIsSettingsDelete}}active{{end}} item" href="{{AppSubUrl}}/user/settings/delete">
{{.i18n.Tr "settings.delete"}}
</a>

48
templates/user/settings/twofa.tmpl Normal file
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@ -0,0 +1,48 @@
{{template "base/head" .}}
<div class="user settings delete">
<div class="ui container">
<div class="ui grid">
{{template "user/settings/navbar" .}}
<div class="twelve wide column content">
{{template "base/alert" .}}
<h4 class="ui top attached header">
{{.i18n.Tr "settings.twofa"}}
</h4>
<div class="ui attached segment">
<p>{{.i18n.Tr "settings.twofa_desc"}}</p>
{{if .TwofaEnrolled}}
<p>{{$.i18n.Tr "settings.twofa_is_enrolled" | Str2html }}</p>
<form class="ui form" action="{{.Link}}/regenerate_scratch" method="post" enctype="multipart/form-data">
{{.CsrfTokenHtml}}
<p>{{.i18n.Tr "settings.regenerate_scratch_token_desc"}}</p>
<button class="ui blue button">{{$.i18n.Tr "settings.twofa_scratch_token_regenerate"}}</button>
</form>
<form class="ui form" action="{{.Link}}/disable" method="post" enctype="multipart/form-data" id="disable-form">
{{.CsrfTokenHtml}}
<p>{{.i18n.Tr "settings.twofa_disable_note"}}</p>
<div class="ui red button delete-button" data-type="form" data-form="#disable-form">{{$.i18n.Tr "settings.twofa_disable"}}</div>
</form>
{{else}}
<p>{{.i18n.Tr "settings.twofa_not_enrolled"}}</p>
<div class="inline field">
<a class="ui green button" href="{{.Link}}/enroll">{{$.i18n.Tr "settings.twofa_enroll"}}</a>
</div>
{{end}}
</div>
</div>
</div>
</div>
</div>
<div class="ui small basic delete modal">
<div class="ui icon header">
<i class="trash icon"></i>
{{.i18n.Tr "settings.twofa_disable"}}
</div>
<div class="content">
<p>{{.i18n.Tr "settings.twofa_disable_desc"}}</p>
</div>
{{template "base/delete_modal_actions" .}}
</div>
{{template "base/footer" .}}

33
templates/user/settings/twofa_enroll.tmpl Normal file
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@ -0,0 +1,33 @@
{{template "base/head" .}}
<div class="user settings delete">
<div class="ui container">
<div class="ui grid">
{{template "user/settings/navbar" .}}
<div class="twelve wide column content">
{{template "base/alert" .}}
<h4 class="ui top attached header">
{{.i18n.Tr "settings.twofa_enroll"}}
</h4>
<div class="ui attached segment">
<p>{{.i18n.Tr "settings.scan_this_image"}}</p>
<img src="{{.QrUri}}" alt="{{.TwofaSecret}}">
<p>{{.i18n.Tr "settings.or_enter_secret" .TwofaSecret}}
<p>{{.i18n.Tr "settings.then_enter_passcode"}}
<form class="ui form" action="{{.Link}}" method="post">
{{.CsrfTokenHtml}}
<div class="inline required field {{if .Err_Passcode}}error{{end}}">
<label for="passcode">{{.i18n.Tr "passcode"}}</label>
<input id="passcode" name="passcode" autofocus required>
</div>
<div class="inline field">
<label></label>
<button class="ui green button">{{.i18n.Tr "auth.verify"}}</button>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
{{template "base/footer" .}}

21
vendor/github.com/boombuler/barcode/LICENSE generated vendored Normal file
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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2014 Florian Sundermann
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

18
vendor/github.com/boombuler/barcode/README.md generated vendored Normal file
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@ -0,0 +1,18 @@
##Introduction##
This is a package for GO which can be used to create different types of barcodes.
##Supported Barcode Types##
* Aztec Code
* Codabar
* Code 128
* Code 39
* EAN 8
* EAN 13
* Datamatrix
* QR Codes
* 2 of 5
##Documentation##
See [GoDoc](https://godoc.org/github.com/boombuler/barcode)
To create a barcode use the Encode function from one of the subpackages.

21
vendor/github.com/boombuler/barcode/barcode.go generated vendored Normal file
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@ -0,0 +1,21 @@
package barcode
import "image"
// Contains some meta information about a barcode
type Metadata struct {
// the name of the barcode kind
CodeKind string
// contains 1 for 1D barcodes or 2 for 2D barcodes
Dimensions byte
}
// a rendered and encoded barcode
type Barcode interface {
image.Image
// returns some meta information about the barcode
Metadata() Metadata
// the data that was encoded in this barcode
Content() string
CheckSum() int
}

66
vendor/github.com/boombuler/barcode/qr/alphanumeric.go generated vendored Normal file
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@ -0,0 +1,66 @@
package qr
import (
"errors"
"fmt"
"strings"
"github.com/boombuler/barcode/utils"
)
const charSet string = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:"
func stringToAlphaIdx(content string) <-chan int {
result := make(chan int)
go func() {
for _, r := range content {
idx := strings.IndexRune(charSet, r)
result <- idx
if idx < 0 {
break
}
}
close(result)
}()
return result
}
func encodeAlphaNumeric(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
contentLenIsOdd := len(content)%2 == 1
contentBitCount := (len(content) / 2) * 11
if contentLenIsOdd {
contentBitCount += 6
}
vi := findSmallestVersionInfo(ecl, alphaNumericMode, contentBitCount)
if vi == nil {
return nil, nil, errors.New("To much data to encode")
}
res := new(utils.BitList)
res.AddBits(int(alphaNumericMode), 4)
res.AddBits(len(content), vi.charCountBits(alphaNumericMode))
encoder := stringToAlphaIdx(content)
for idx := 0; idx < len(content)/2; idx++ {
c1 := <-encoder
c2 := <-encoder
if c1 < 0 || c2 < 0 {
return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, AlphaNumeric)
}
res.AddBits(c1*45+c2, 11)
}
if contentLenIsOdd {
c := <-encoder
if c < 0 {
return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, AlphaNumeric)
}
res.AddBits(c, 6)
}
addPaddingAndTerminator(res, vi)
return res, vi, nil
}

23
vendor/github.com/boombuler/barcode/qr/automatic.go generated vendored Normal file
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@ -0,0 +1,23 @@
package qr
import (
"fmt"
"github.com/boombuler/barcode/utils"
)
func encodeAuto(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
bits, vi, _ := Numeric.getEncoder()(content, ecl)
if bits != nil && vi != nil {
return bits, vi, nil
}
bits, vi, _ = AlphaNumeric.getEncoder()(content, ecl)
if bits != nil && vi != nil {
return bits, vi, nil
}
bits, vi, _ = Unicode.getEncoder()(content, ecl)
if bits != nil && vi != nil {
return bits, vi, nil
}
return nil, nil, fmt.Errorf("No encoding found to encode \"%s\"", content)
}

59
vendor/github.com/boombuler/barcode/qr/blocks.go generated vendored Normal file
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@ -0,0 +1,59 @@
package qr
type block struct {
data []byte
ecc []byte
}
type blockList []*block
func splitToBlocks(data <-chan byte, vi *versionInfo) blockList {
result := make(blockList, vi.NumberOfBlocksInGroup1+vi.NumberOfBlocksInGroup2)
for b := 0; b < int(vi.NumberOfBlocksInGroup1); b++ {
blk := new(block)
blk.data = make([]byte, vi.DataCodeWordsPerBlockInGroup1)
for cw := 0; cw < int(vi.DataCodeWordsPerBlockInGroup1); cw++ {
blk.data[cw] = <-data
}
blk.ecc = ec.calcECC(blk.data, vi.ErrorCorrectionCodewordsPerBlock)
result[b] = blk
}
for b := 0; b < int(vi.NumberOfBlocksInGroup2); b++ {
blk := new(block)
blk.data = make([]byte, vi.DataCodeWordsPerBlockInGroup2)
for cw := 0; cw < int(vi.DataCodeWordsPerBlockInGroup2); cw++ {
blk.data[cw] = <-data
}
blk.ecc = ec.calcECC(blk.data, vi.ErrorCorrectionCodewordsPerBlock)
result[int(vi.NumberOfBlocksInGroup1)+b] = blk
}
return result
}
func (bl blockList) interleave(vi *versionInfo) []byte {
var maxCodewordCount int
if vi.DataCodeWordsPerBlockInGroup1 > vi.DataCodeWordsPerBlockInGroup2 {
maxCodewordCount = int(vi.DataCodeWordsPerBlockInGroup1)
} else {
maxCodewordCount = int(vi.DataCodeWordsPerBlockInGroup2)
}
resultLen := (vi.DataCodeWordsPerBlockInGroup1+vi.ErrorCorrectionCodewordsPerBlock)*vi.NumberOfBlocksInGroup1 +
(vi.DataCodeWordsPerBlockInGroup2+vi.ErrorCorrectionCodewordsPerBlock)*vi.NumberOfBlocksInGroup2
result := make([]byte, 0, resultLen)
for i := 0; i < maxCodewordCount; i++ {
for b := 0; b < len(bl); b++ {
if len(bl[b].data) > i {
result = append(result, bl[b].data[i])
}
}
}
for i := 0; i < int(vi.ErrorCorrectionCodewordsPerBlock); i++ {
for b := 0; b < len(bl); b++ {
result = append(result, bl[b].ecc[i])
}
}
return result
}

416
vendor/github.com/boombuler/barcode/qr/encoder.go generated vendored Normal file
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@ -0,0 +1,416 @@
// Package qr can be used to create QR barcodes.
package qr
import (
"image"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/utils"
)
type encodeFn func(content string, eccLevel ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error)
// Encoding mode for QR Codes.
type Encoding byte
const (
// Auto will choose ths best matching encoding
Auto Encoding = iota
// Numeric encoding only encodes numbers [0-9]
Numeric
// AlphaNumeric encoding only encodes uppercase letters, numbers and [Space], $, %, *, +, -, ., /, :
AlphaNumeric
// Unicode encoding encodes the string as utf-8
Unicode
// only for testing purpose
unknownEncoding
)
func (e Encoding) getEncoder() encodeFn {
switch e {
case Auto:
return encodeAuto
case Numeric:
return encodeNumeric
case AlphaNumeric:
return encodeAlphaNumeric
case Unicode:
return encodeUnicode
}
return nil
}
func (e Encoding) String() string {
switch e {
case Auto:
return "Auto"
case Numeric:
return "Numeric"
case AlphaNumeric:
return "AlphaNumeric"
case Unicode:
return "Unicode"
}
return ""
}
// Encode returns a QR barcode with the given content, error correction level and uses the given encoding
func Encode(content string, level ErrorCorrectionLevel, mode Encoding) (barcode.Barcode, error) {
bits, vi, err := mode.getEncoder()(content, level)
if err != nil {
return nil, err
}
blocks := splitToBlocks(bits.IterateBytes(), vi)
data := blocks.interleave(vi)
result := render(data, vi)
result.content = content
return result, nil
}
func render(data []byte, vi *versionInfo) *qrcode {
dim := vi.modulWidth()
results := make([]*qrcode, 8)
for i := 0; i < 8; i++ {
results[i] = newBarcode(dim)
}
occupied := newBarcode(dim)
setAll := func(x int, y int, val bool) {
occupied.Set(x, y, true)
for i := 0; i < 8; i++ {
results[i].Set(x, y, val)
}
}
drawFinderPatterns(vi, setAll)
drawAlignmentPatterns(occupied, vi, setAll)
//Timing Pattern:
var i int
for i = 0; i < dim; i++ {
if !occupied.Get(i, 6) {
setAll(i, 6, i%2 == 0)
}
if !occupied.Get(6, i) {
setAll(6, i, i%2 == 0)
}
}
// Dark Module
setAll(8, dim-8, true)
drawVersionInfo(vi, setAll)
drawFormatInfo(vi, -1, occupied.Set)
for i := 0; i < 8; i++ {
drawFormatInfo(vi, i, results[i].Set)
}
// Write the data
var curBitNo int
for pos := range iterateModules(occupied) {
var curBit bool
if curBitNo < len(data)*8 {
curBit = ((data[curBitNo/8] >> uint(7-(curBitNo%8))) & 1) == 1
} else {
curBit = false
}
for i := 0; i < 8; i++ {
setMasked(pos.X, pos.Y, curBit, i, results[i].Set)
}
curBitNo++
}
lowestPenalty := ^uint(0)
lowestPenaltyIdx := -1
for i := 0; i < 8; i++ {
p := results[i].calcPenalty()
if p < lowestPenalty {
lowestPenalty = p
lowestPenaltyIdx = i
}
}
return results[lowestPenaltyIdx]
}
func setMasked(x, y int, val bool, mask int, set func(int, int, bool)) {
switch mask {
case 0:
val = val != (((y + x) % 2) == 0)
break
case 1:
val = val != ((y % 2) == 0)
break
case 2:
val = val != ((x % 3) == 0)
break
case 3:
val = val != (((y + x) % 3) == 0)
break
case 4:
val = val != (((y/2 + x/3) % 2) == 0)
break
case 5:
val = val != (((y*x)%2)+((y*x)%3) == 0)
break
case 6:
val = val != ((((y*x)%2)+((y*x)%3))%2 == 0)
break
case 7:
val = val != ((((y+x)%2)+((y*x)%3))%2 == 0)
}
set(x, y, val)
}
func iterateModules(occupied *qrcode) <-chan image.Point {
result := make(chan image.Point)
allPoints := make(chan image.Point)
go func() {
curX := occupied.dimension - 1
curY := occupied.dimension - 1
isUpward := true
for true {
if isUpward {
allPoints <- image.Pt(curX, curY)
allPoints <- image.Pt(curX-1, curY)
curY--
if curY < 0 {
curY = 0
curX -= 2
if curX == 6 {
curX--
}
if curX < 0 {
break
}
isUpward = false
}
} else {
allPoints <- image.Pt(curX, curY)
allPoints <- image.Pt(curX-1, curY)
curY++
if curY >= occupied.dimension {
curY = occupied.dimension - 1
curX -= 2
if curX == 6 {
curX--
}
isUpward = true
if curX < 0 {
break
}
}
}
}
close(allPoints)
}()
go func() {
for pt := range allPoints {
if !occupied.Get(pt.X, pt.Y) {
result <- pt
}
}
close(result)
}()
return result
}
func drawFinderPatterns(vi *versionInfo, set func(int, int, bool)) {
dim := vi.modulWidth()
drawPattern := func(xoff int, yoff int) {
for x := -1; x < 8; x++ {
for y := -1; y < 8; y++ {
val := (x == 0 || x == 6 || y == 0 || y == 6 || (x > 1 && x < 5 && y > 1 && y < 5)) && (x <= 6 && y <= 6 && x >= 0 && y >= 0)
if x+xoff >= 0 && x+xoff < dim && y+yoff >= 0 && y+yoff < dim {
set(x+xoff, y+yoff, val)
}
}
}
}
drawPattern(0, 0)
drawPattern(0, dim-7)
drawPattern(dim-7, 0)
}
func drawAlignmentPatterns(occupied *qrcode, vi *versionInfo, set func(int, int, bool)) {
drawPattern := func(xoff int, yoff int) {
for x := -2; x <= 2; x++ {
for y := -2; y <= 2; y++ {
val := x == -2 || x == 2 || y == -2 || y == 2 || (x == 0 && y == 0)
set(x+xoff, y+yoff, val)
}
}
}
positions := vi.alignmentPatternPlacements()
for _, x := range positions {
for _, y := range positions {
if occupied.Get(x, y) {
continue
}
drawPattern(x, y)
}
}
}
var formatInfos = map[ErrorCorrectionLevel]map[int][]bool{
L: {
0: []bool{true, true, true, false, true, true, true, true, true, false, false, false, true, false, false},
1: []bool{true, true, true, false, false, true, false, true, true, true, true, false, false, true, true},
2: []bool{true, true, true, true, true, false, true, true, false, true, false, true, false, true, false},
3: []bool{true, true, true, true, false, false, false, true, false, false, true, true, true, false, true},
4: []bool{true, true, false, false, true, true, false, false, false, true, false, true, true, true, true},
5: []bool{true, true, false, false, false, true, true, false, false, false, true, true, false, false, false},
6: []bool{true, true, false, true, true, false, false, false, true, false, false, false, false, false, true},
7: []bool{true, true, false, true, false, false, true, false, true, true, true, false, true, true, false},
},
M: {
0: []bool{true, false, true, false, true, false, false, false, false, false, true, false, false, true, false},
1: []bool{true, false, true, false, false, false, true, false, false, true, false, false, true, false, true},
2: []bool{true, false, true, true, true, true, false, false, true, true, true, true, true, false, false},
3: []bool{true, false, true, true, false, true, true, false, true, false, false, true, false, true, true},
4: []bool{true, false, false, false, true, false, true, true, true, true, true, true, false, false, true},
5: []bool{true, false, false, false, false, false, false, true, true, false, false, true, true, true, false},
6: []bool{true, false, false, true, true, true, true, true, false, false, true, false, true, true, true},
7: []bool{true, false, false, true, false, true, false, true, false, true, false, false, false, false, false},
},
Q: {
0: []bool{false, true, true, false, true, false, true, false, true, false, true, true, true, true, true},
1: []bool{false, true, true, false, false, false, false, false, true, true, false, true, false, false, false},
2: []bool{false, true, true, true, true, true, true, false, false, true, true, false, false, false, true},
3: []bool{false, true, true, true, false, true, false, false, false, false, false, false, true, true, false},
4: []bool{false, true, false, false, true, false, false, true, false, true, true, false, true, false, false},
5: []bool{false, true, false, false, false, false, true, true, false, false, false, false, false, true, true},
6: []bool{false, true, false, true, true, true, false, true, true, false, true, true, false, true, false},
7: []bool{false, true, false, true, false, true, true, true, true, true, false, true, true, false, true},
},
H: {
0: []bool{false, false, true, false, true, true, false, true, false, false, false, true, false, false, true},
1: []bool{false, false, true, false, false, true, true, true, false, true, true, true, true, true, false},
2: []bool{false, false, true, true, true, false, false, true, true, true, false, false, true, true, true},
3: []bool{false, false, true, true, false, false, true, true, true, false, true, false, false, false, false},
4: []bool{false, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
5: []bool{false, false, false, false, false, true, false, false, true, false, true, false, true, false, true},
6: []bool{false, false, false, true, true, false, true, false, false, false, false, true, true, false, false},
7: []bool{false, false, false, true, false, false, false, false, false, true, true, true, false, true, true},
},
}
func drawFormatInfo(vi *versionInfo, usedMask int, set func(int, int, bool)) {
var formatInfo []bool
if usedMask == -1 {
formatInfo = []bool{true, true, true, true, true, true, true, true, true, true, true, true, true, true, true} // Set all to true cause -1 --> occupied mask.
} else {
formatInfo = formatInfos[vi.Level][usedMask]
}
if len(formatInfo) == 15 {
dim := vi.modulWidth()
set(0, 8, formatInfo[0])
set(1, 8, formatInfo[1])
set(2, 8, formatInfo[2])
set(3, 8, formatInfo[3])
set(4, 8, formatInfo[4])
set(5, 8, formatInfo[5])
set(7, 8, formatInfo[6])
set(8, 8, formatInfo[7])
set(8, 7, formatInfo[8])
set(8, 5, formatInfo[9])
set(8, 4, formatInfo[10])
set(8, 3, formatInfo[11])
set(8, 2, formatInfo[12])
set(8, 1, formatInfo[13])
set(8, 0, formatInfo[14])
set(8, dim-1, formatInfo[0])
set(8, dim-2, formatInfo[1])
set(8, dim-3, formatInfo[2])
set(8, dim-4, formatInfo[3])
set(8, dim-5, formatInfo[4])
set(8, dim-6, formatInfo[5])
set(8, dim-7, formatInfo[6])
set(dim-8, 8, formatInfo[7])
set(dim-7, 8, formatInfo[8])
set(dim-6, 8, formatInfo[9])
set(dim-5, 8, formatInfo[10])
set(dim-4, 8, formatInfo[11])
set(dim-3, 8, formatInfo[12])
set(dim-2, 8, formatInfo[13])
set(dim-1, 8, formatInfo[14])
}
}
var versionInfoBitsByVersion = map[byte][]bool{
7: []bool{false, false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false},
8: []bool{false, false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false},
9: []bool{false, false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true},
10: []bool{false, false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true},
11: []bool{false, false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false},
12: []bool{false, false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false},
13: []bool{false, false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true},
14: []bool{false, false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true},
15: []bool{false, false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false},
16: []bool{false, true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false},
17: []bool{false, true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true},
18: []bool{false, true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true},
19: []bool{false, true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false},
20: []bool{false, true, false, true, false, false, true, false, false, true, true, false, true, false, false, true, true, false},
21: []bool{false, true, false, true, false, true, false, true, true, false, true, false, false, false, false, false, true, true},
22: []bool{false, true, false, true, true, false, true, false, false, false, true, true, false, false, true, false, false, true},
23: []bool{false, true, false, true, true, true, false, true, true, true, true, true, true, false, true, true, false, false},
24: []bool{false, true, true, false, false, false, true, true, true, false, true, true, false, false, false, true, false, false},
25: []bool{false, true, true, false, false, true, false, false, false, true, true, true, true, false, false, false, false, true},
26: []bool{false, true, true, false, true, false, true, true, true, true, true, false, true, false, true, false, true, true},
27: []bool{false, true, true, false, true, true, false, false, false, false, true, false, false, false, true, true, true, false},
28: []bool{false, true, true, true, false, false, true, true, false, false, false, false, false, true, true, false, true, false},
29: []bool{false, true, true, true, false, true, false, false, true, true, false, false, true, true, true, true, true, true},
30: []bool{false, true, true, true, true, false, true, true, false, true, false, true, true, true, false, true, false, true},
31: []bool{false, true, true, true, true, true, false, false, true, false, false, true, false, true, false, false, false, false},
32: []bool{true, false, false, false, false, false, true, false, false, true, true, true, false, true, false, true, false, true},
33: []bool{true, false, false, false, false, true, false, true, true, false, true, true, true, true, false, false, false, false},
34: []bool{true, false, false, false, true, false, true, false, false, false, true, false, true, true, true, false, true, false},
35: []bool{true, false, false, false, true, true, false, true, true, true, true, false, false, true, true, true, true, true},
36: []bool{true, false, false, true, false, false, true, false, true, true, false, false, false, false, true, false, true, true},
37: []bool{true, false, false, true, false, true, false, true, false, false, false, false, true, false, true, true, true, false},
38: []bool{true, false, false, true, true, false, true, false, true, false, false, true, true, false, false, true, false, false},
39: []bool{true, false, false, true, true, true, false, true, false, true, false, true, false, false, false, false, false, true},
40: []bool{true, false, true, false, false, false, true, true, false, false, false, true, true, false, true, false, false, true},
}
func drawVersionInfo(vi *versionInfo, set func(int, int, bool)) {
versionInfoBits, ok := versionInfoBitsByVersion[vi.Version]
if ok && len(versionInfoBits) > 0 {
for i := 0; i < len(versionInfoBits); i++ {
x := (vi.modulWidth() - 11) + i%3
y := i / 3
set(x, y, versionInfoBits[len(versionInfoBits)-i-1])
set(y, x, versionInfoBits[len(versionInfoBits)-i-1])
}
}
}
func addPaddingAndTerminator(bl *utils.BitList, vi *versionInfo) {
for i := 0; i < 4 && bl.Len() < vi.totalDataBytes()*8; i++ {
bl.AddBit(false)
}
for bl.Len()%8 != 0 {
bl.AddBit(false)
}
for i := 0; bl.Len() < vi.totalDataBytes()*8; i++ {
if i%2 == 0 {
bl.AddByte(236)
} else {
bl.AddByte(17)
}
}
}

29
vendor/github.com/boombuler/barcode/qr/errorcorrection.go generated vendored Normal file
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@ -0,0 +1,29 @@
package qr
import (
"github.com/boombuler/barcode/utils"
)
type errorCorrection struct {
rs *utils.ReedSolomonEncoder
}
var ec = newErrorCorrection()
func newErrorCorrection() *errorCorrection {
fld := utils.NewGaloisField(285, 256, 0)
return &errorCorrection{utils.NewReedSolomonEncoder(fld)}
}
func (ec *errorCorrection) calcECC(data []byte, eccCount byte) []byte {
dataInts := make([]int, len(data))
for i := 0; i < len(data); i++ {
dataInts[i] = int(data[i])
}
res := ec.rs.Encode(dataInts, int(eccCount))
result := make([]byte, len(res))
for i := 0; i < len(res); i++ {
result[i] = byte(res[i])
}
return result
}

56
vendor/github.com/boombuler/barcode/qr/numeric.go generated vendored Normal file
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@ -0,0 +1,56 @@
package qr
import (
"errors"
"fmt"
"strconv"
"github.com/boombuler/barcode/utils"
)
func encodeNumeric(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
contentBitCount := (len(content) / 3) * 10
switch len(content) % 3 {
case 1:
contentBitCount += 4
case 2:
contentBitCount += 7
}
vi := findSmallestVersionInfo(ecl, numericMode, contentBitCount)
if vi == nil {
return nil, nil, errors.New("To much data to encode")
}
res := new(utils.BitList)
res.AddBits(int(numericMode), 4)
res.AddBits(len(content), vi.charCountBits(numericMode))
for pos := 0; pos < len(content); pos += 3 {
var curStr string
if pos+3 <= len(content) {
curStr = content[pos : pos+3]
} else {
curStr = content[pos:]
}
i, err := strconv.Atoi(curStr)
if err != nil || i < 0 {
return nil, nil, fmt.Errorf("\"%s\" can not be encoded as %s", content, Numeric)
}
var bitCnt byte
switch len(curStr) % 3 {
case 0:
bitCnt = 10
case 1:
bitCnt = 4
break
case 2:
bitCnt = 7
break
}
res.AddBits(i, bitCnt)
}
addPaddingAndTerminator(res, vi)
return res, vi, nil
}

170
vendor/github.com/boombuler/barcode/qr/qrcode.go generated vendored Normal file
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@ -0,0 +1,170 @@
package qr
import (
"image"
"image/color"
"math"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/utils"
)
type qrcode struct {
dimension int
data *utils.BitList
content string
}
func (qr *qrcode) Content() string {
return qr.content
}
func (qr *qrcode) Metadata() barcode.Metadata {
return barcode.Metadata{"QR Code", 2}
}
func (qr *qrcode) ColorModel() color.Model {
return color.Gray16Model
}
func (qr *qrcode) Bounds() image.Rectangle {
return image.Rect(0, 0, qr.dimension, qr.dimension)
}
func (qr *qrcode) At(x, y int) color.Color {
if qr.Get(x, y) {
return color.Black
}
return color.White
}
func (qr *qrcode) Get(x, y int) bool {
return qr.data.GetBit(x*qr.dimension + y)
}
func (qr *qrcode) Set(x, y int, val bool) {
qr.data.SetBit(x*qr.dimension+y, val)
}
func (qr *qrcode) CheckSum() int {
return 0
}
func (qr *qrcode) calcPenalty() uint {
return qr.calcPenaltyRule1() + qr.calcPenaltyRule2() + qr.calcPenaltyRule3() + qr.calcPenaltyRule4()
}
func (qr *qrcode) calcPenaltyRule1() uint {
var result uint
for x := 0; x < qr.dimension; x++ {
checkForX := false
var cntX uint
checkForY := false
var cntY uint
for y := 0; y < qr.dimension; y++ {
if qr.Get(x, y) == checkForX {
cntX++
} else {
checkForX = !checkForX
if cntX >= 5 {
result += cntX - 2
}
cntX = 1
}
if qr.Get(y, x) == checkForY {
cntY++
} else {
checkForY = !checkForY
if cntY >= 5 {
result += cntY - 2
}
cntY = 1
}
}
if cntX >= 5 {
result += cntX - 2
}
if cntY >= 5 {
result += cntY - 2
}
}
return result
}
func (qr *qrcode) calcPenaltyRule2() uint {
var result uint
for x := 0; x < qr.dimension-1; x++ {
for y := 0; y < qr.dimension-1; y++ {
check := qr.Get(x, y)
if qr.Get(x, y+1) == check && qr.Get(x+1, y) == check && qr.Get(x+1, y+1) == check {
result += 3
}
}
}
return result
}
func (qr *qrcode) calcPenaltyRule3() uint {
pattern1 := []bool{true, false, true, true, true, false, true, false, false, false, false}
pattern2 := []bool{false, false, false, false, true, false, true, true, true, false, true}
var result uint
for x := 0; x <= qr.dimension-len(pattern1); x++ {
for y := 0; y < qr.dimension; y++ {
pattern1XFound := true
pattern2XFound := true
pattern1YFound := true
pattern2YFound := true
for i := 0; i < len(pattern1); i++ {
iv := qr.Get(x+i, y)
if iv != pattern1[i] {
pattern1XFound = false
}
if iv != pattern2[i] {
pattern2XFound = false
}
iv = qr.Get(y, x+i)
if iv != pattern1[i] {
pattern1YFound = false
}
if iv != pattern2[i] {
pattern2YFound = false
}
}
if pattern1XFound || pattern2XFound {
result += 40
}
if pattern1YFound || pattern2YFound {
result += 40
}
}
}
return result
}
func (qr *qrcode) calcPenaltyRule4() uint {
totalNum := qr.data.Len()
trueCnt := 0
for i := 0; i < totalNum; i++ {
if qr.data.GetBit(i) {
trueCnt++
}
}
percDark := float64(trueCnt) * 100 / float64(totalNum)
floor := math.Abs(math.Floor(percDark/5) - 10)
ceil := math.Abs(math.Ceil(percDark/5) - 10)
return uint(math.Min(floor, ceil) * 10)
}
func newBarcode(dim int) *qrcode {
res := new(qrcode)
res.dimension = dim
res.data = utils.NewBitList(dim * dim)
return res
}

27
vendor/github.com/boombuler/barcode/qr/unicode.go generated vendored Normal file
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package qr
import (
"errors"
"github.com/boombuler/barcode/utils"
)
func encodeUnicode(content string, ecl ErrorCorrectionLevel) (*utils.BitList, *versionInfo, error) {
data := []byte(content)
vi := findSmallestVersionInfo(ecl, byteMode, len(data)*8)
if vi == nil {
return nil, nil, errors.New("To much data to encode")
}
// It's not correct to add the unicode bytes to the result directly but most readers can't handle the
// required ECI header...
res := new(utils.BitList)
res.AddBits(int(byteMode), 4)
res.AddBits(len(content), vi.charCountBits(byteMode))
for _, b := range data {
res.AddByte(b)
}
addPaddingAndTerminator(res, vi)
return res, vi, nil
}

310
vendor/github.com/boombuler/barcode/qr/versioninfo.go generated vendored Normal file
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@ -0,0 +1,310 @@
package qr
import "math"
// ErrorCorrectionLevel indicates the amount of "backup data" stored in the QR code
type ErrorCorrectionLevel byte
const (
// L recovers 7% of data
L ErrorCorrectionLevel = iota
// M recovers 15% of data
M
// Q recovers 25% of data
Q
// H recovers 30% of data
H
)
func (ecl ErrorCorrectionLevel) String() string {
switch ecl {
case L:
return "L"
case M:
return "M"
case Q:
return "Q"
case H:
return "H"
}
return "unknown"
}
type encodingMode byte
const (
numericMode encodingMode = 1
alphaNumericMode encodingMode = 2
byteMode encodingMode = 4
kanjiMode encodingMode = 8
)
type versionInfo struct {
Version byte
Level ErrorCorrectionLevel
ErrorCorrectionCodewordsPerBlock byte
NumberOfBlocksInGroup1 byte
DataCodeWordsPerBlockInGroup1 byte
NumberOfBlocksInGroup2 byte
DataCodeWordsPerBlockInGroup2 byte
}
var versionInfos = []*versionInfo{
&versionInfo{1, L, 7, 1, 19, 0, 0},
&versionInfo{1, M, 10, 1, 16, 0, 0},
&versionInfo{1, Q, 13, 1, 13, 0, 0},
&versionInfo{1, H, 17, 1, 9, 0, 0},
&versionInfo{2, L, 10, 1, 34, 0, 0},
&versionInfo{2, M, 16, 1, 28, 0, 0},
&versionInfo{2, Q, 22, 1, 22, 0, 0},
&versionInfo{2, H, 28, 1, 16, 0, 0},
&versionInfo{3, L, 15, 1, 55, 0, 0},
&versionInfo{3, M, 26, 1, 44, 0, 0},
&versionInfo{3, Q, 18, 2, 17, 0, 0},
&versionInfo{3, H, 22, 2, 13, 0, 0},
&versionInfo{4, L, 20, 1, 80, 0, 0},
&versionInfo{4, M, 18, 2, 32, 0, 0},
&versionInfo{4, Q, 26, 2, 24, 0, 0},
&versionInfo{4, H, 16, 4, 9, 0, 0},
&versionInfo{5, L, 26, 1, 108, 0, 0},
&versionInfo{5, M, 24, 2, 43, 0, 0},
&versionInfo{5, Q, 18, 2, 15, 2, 16},
&versionInfo{5, H, 22, 2, 11, 2, 12},
&versionInfo{6, L, 18, 2, 68, 0, 0},
&versionInfo{6, M, 16, 4, 27, 0, 0},
&versionInfo{6, Q, 24, 4, 19, 0, 0},
&versionInfo{6, H, 28, 4, 15, 0, 0},
&versionInfo{7, L, 20, 2, 78, 0, 0},
&versionInfo{7, M, 18, 4, 31, 0, 0},
&versionInfo{7, Q, 18, 2, 14, 4, 15},
&versionInfo{7, H, 26, 4, 13, 1, 14},
&versionInfo{8, L, 24, 2, 97, 0, 0},
&versionInfo{8, M, 22, 2, 38, 2, 39},
&versionInfo{8, Q, 22, 4, 18, 2, 19},
&versionInfo{8, H, 26, 4, 14, 2, 15},
&versionInfo{9, L, 30, 2, 116, 0, 0},
&versionInfo{9, M, 22, 3, 36, 2, 37},
&versionInfo{9, Q, 20, 4, 16, 4, 17},
&versionInfo{9, H, 24, 4, 12, 4, 13},
&versionInfo{10, L, 18, 2, 68, 2, 69},
&versionInfo{10, M, 26, 4, 43, 1, 44},
&versionInfo{10, Q, 24, 6, 19, 2, 20},
&versionInfo{10, H, 28, 6, 15, 2, 16},
&versionInfo{11, L, 20, 4, 81, 0, 0},
&versionInfo{11, M, 30, 1, 50, 4, 51},
&versionInfo{11, Q, 28, 4, 22, 4, 23},
&versionInfo{11, H, 24, 3, 12, 8, 13},
&versionInfo{12, L, 24, 2, 92, 2, 93},
&versionInfo{12, M, 22, 6, 36, 2, 37},
&versionInfo{12, Q, 26, 4, 20, 6, 21},
&versionInfo{12, H, 28, 7, 14, 4, 15},
&versionInfo{13, L, 26, 4, 107, 0, 0},
&versionInfo{13, M, 22, 8, 37, 1, 38},
&versionInfo{13, Q, 24, 8, 20, 4, 21},
&versionInfo{13, H, 22, 12, 11, 4, 12},
&versionInfo{14, L, 30, 3, 115, 1, 116},
&versionInfo{14, M, 24, 4, 40, 5, 41},
&versionInfo{14, Q, 20, 11, 16, 5, 17},
&versionInfo{14, H, 24, 11, 12, 5, 13},
&versionInfo{15, L, 22, 5, 87, 1, 88},
&versionInfo{15, M, 24, 5, 41, 5, 42},
&versionInfo{15, Q, 30, 5, 24, 7, 25},
&versionInfo{15, H, 24, 11, 12, 7, 13},
&versionInfo{16, L, 24, 5, 98, 1, 99},
&versionInfo{16, M, 28, 7, 45, 3, 46},
&versionInfo{16, Q, 24, 15, 19, 2, 20},
&versionInfo{16, H, 30, 3, 15, 13, 16},
&versionInfo{17, L, 28, 1, 107, 5, 108},
&versionInfo{17, M, 28, 10, 46, 1, 47},
&versionInfo{17, Q, 28, 1, 22, 15, 23},
&versionInfo{17, H, 28, 2, 14, 17, 15},
&versionInfo{18, L, 30, 5, 120, 1, 121},
&versionInfo{18, M, 26, 9, 43, 4, 44},
&versionInfo{18, Q, 28, 17, 22, 1, 23},
&versionInfo{18, H, 28, 2, 14, 19, 15},
&versionInfo{19, L, 28, 3, 113, 4, 114},
&versionInfo{19, M, 26, 3, 44, 11, 45},
&versionInfo{19, Q, 26, 17, 21, 4, 22},
&versionInfo{19, H, 26, 9, 13, 16, 14},
&versionInfo{20, L, 28, 3, 107, 5, 108},
&versionInfo{20, M, 26, 3, 41, 13, 42},
&versionInfo{20, Q, 30, 15, 24, 5, 25},
&versionInfo{20, H, 28, 15, 15, 10, 16},
&versionInfo{21, L, 28, 4, 116, 4, 117},
&versionInfo{21, M, 26, 17, 42, 0, 0},
&versionInfo{21, Q, 28, 17, 22, 6, 23},
&versionInfo{21, H, 30, 19, 16, 6, 17},
&versionInfo{22, L, 28, 2, 111, 7, 112},
&versionInfo{22, M, 28, 17, 46, 0, 0},
&versionInfo{22, Q, 30, 7, 24, 16, 25},
&versionInfo{22, H, 24, 34, 13, 0, 0},
&versionInfo{23, L, 30, 4, 121, 5, 122},
&versionInfo{23, M, 28, 4, 47, 14, 48},
&versionInfo{23, Q, 30, 11, 24, 14, 25},
&versionInfo{23, H, 30, 16, 15, 14, 16},
&versionInfo{24, L, 30, 6, 117, 4, 118},
&versionInfo{24, M, 28, 6, 45, 14, 46},
&versionInfo{24, Q, 30, 11, 24, 16, 25},
&versionInfo{24, H, 30, 30, 16, 2, 17},
&versionInfo{25, L, 26, 8, 106, 4, 107},
&versionInfo{25, M, 28, 8, 47, 13, 48},
&versionInfo{25, Q, 30, 7, 24, 22, 25},
&versionInfo{25, H, 30, 22, 15, 13, 16},
&versionInfo{26, L, 28, 10, 114, 2, 115},
&versionInfo{26, M, 28, 19, 46, 4, 47},
&versionInfo{26, Q, 28, 28, 22, 6, 23},
&versionInfo{26, H, 30, 33, 16, 4, 17},
&versionInfo{27, L, 30, 8, 122, 4, 123},
&versionInfo{27, M, 28, 22, 45, 3, 46},
&versionInfo{27, Q, 30, 8, 23, 26, 24},
&versionInfo{27, H, 30, 12, 15, 28, 16},
&versionInfo{28, L, 30, 3, 117, 10, 118},
&versionInfo{28, M, 28, 3, 45, 23, 46},
&versionInfo{28, Q, 30, 4, 24, 31, 25},
&versionInfo{28, H, 30, 11, 15, 31, 16},
&versionInfo{29, L, 30, 7, 116, 7, 117},
&versionInfo{29, M, 28, 21, 45, 7, 46},
&versionInfo{29, Q, 30, 1, 23, 37, 24},
&versionInfo{29, H, 30, 19, 15, 26, 16},
&versionInfo{30, L, 30, 5, 115, 10, 116},
&versionInfo{30, M, 28, 19, 47, 10, 48},
&versionInfo{30, Q, 30, 15, 24, 25, 25},
&versionInfo{30, H, 30, 23, 15, 25, 16},
&versionInfo{31, L, 30, 13, 115, 3, 116},
&versionInfo{31, M, 28, 2, 46, 29, 47},
&versionInfo{31, Q, 30, 42, 24, 1, 25},
&versionInfo{31, H, 30, 23, 15, 28, 16},
&versionInfo{32, L, 30, 17, 115, 0, 0},
&versionInfo{32, M, 28, 10, 46, 23, 47},
&versionInfo{32, Q, 30, 10, 24, 35, 25},
&versionInfo{32, H, 30, 19, 15, 35, 16},
&versionInfo{33, L, 30, 17, 115, 1, 116},
&versionInfo{33, M, 28, 14, 46, 21, 47},
&versionInfo{33, Q, 30, 29, 24, 19, 25},
&versionInfo{33, H, 30, 11, 15, 46, 16},
&versionInfo{34, L, 30, 13, 115, 6, 116},
&versionInfo{34, M, 28, 14, 46, 23, 47},
&versionInfo{34, Q, 30, 44, 24, 7, 25},
&versionInfo{34, H, 30, 59, 16, 1, 17},
&versionInfo{35, L, 30, 12, 121, 7, 122},
&versionInfo{35, M, 28, 12, 47, 26, 48},
&versionInfo{35, Q, 30, 39, 24, 14, 25},
&versionInfo{35, H, 30, 22, 15, 41, 16},
&versionInfo{36, L, 30, 6, 121, 14, 122},
&versionInfo{36, M, 28, 6, 47, 34, 48},
&versionInfo{36, Q, 30, 46, 24, 10, 25},
&versionInfo{36, H, 30, 2, 15, 64, 16},
&versionInfo{37, L, 30, 17, 122, 4, 123},
&versionInfo{37, M, 28, 29, 46, 14, 47},
&versionInfo{37, Q, 30, 49, 24, 10, 25},
&versionInfo{37, H, 30, 24, 15, 46, 16},
&versionInfo{38, L, 30, 4, 122, 18, 123},
&versionInfo{38, M, 28, 13, 46, 32, 47},
&versionInfo{38, Q, 30, 48, 24, 14, 25},
&versionInfo{38, H, 30, 42, 15, 32, 16},
&versionInfo{39, L, 30, 20, 117, 4, 118},
&versionInfo{39, M, 28, 40, 47, 7, 48},
&versionInfo{39, Q, 30, 43, 24, 22, 25},
&versionInfo{39, H, 30, 10, 15, 67, 16},
&versionInfo{40, L, 30, 19, 118, 6, 119},
&versionInfo{40, M, 28, 18, 47, 31, 48},
&versionInfo{40, Q, 30, 34, 24, 34, 25},
&versionInfo{40, H, 30, 20, 15, 61, 16},
}
func (vi *versionInfo) totalDataBytes() int {
g1Data := int(vi.NumberOfBlocksInGroup1) * int(vi.DataCodeWordsPerBlockInGroup1)
g2Data := int(vi.NumberOfBlocksInGroup2) * int(vi.DataCodeWordsPerBlockInGroup2)
return (g1Data + g2Data)
}
func (vi *versionInfo) charCountBits(m encodingMode) byte {
switch m {
case numericMode:
if vi.Version < 10 {
return 10
} else if vi.Version < 27 {
return 12
}
return 14
case alphaNumericMode:
if vi.Version < 10 {
return 9
} else if vi.Version < 27 {
return 11
}
return 13
case byteMode:
if vi.Version < 10 {
return 8
}
return 16
case kanjiMode:
if vi.Version < 10 {
return 8
} else if vi.Version < 27 {
return 10
}
return 12
default:
return 0
}
}
func (vi *versionInfo) modulWidth() int {
return ((int(vi.Version) - 1) * 4) + 21
}
func (vi *versionInfo) alignmentPatternPlacements() []int {
if vi.Version == 1 {
return make([]int, 0)
}
first := 6
last := vi.modulWidth() - 7
space := float64(last - first)
count := int(math.Ceil(space/28)) + 1
result := make([]int, count)
result[0] = first
result[len(result)-1] = last
if count > 2 {
step := int(math.Ceil(float64(last-first) / float64(count-1)))
if step%2 == 1 {
frac := float64(last-first) / float64(count-1)
_, x := math.Modf(frac)
if x >= 0.5 {
frac = math.Ceil(frac)
} else {
frac = math.Floor(frac)
}
if int(frac)%2 == 0 {
step--
} else {
step++
}
}
for i := 1; i <= count-2; i++ {
result[i] = last - (step * (count - 1 - i))
}
}
return result
}
func findSmallestVersionInfo(ecl ErrorCorrectionLevel, mode encodingMode, dataBits int) *versionInfo {
dataBits = dataBits + 4 // mode indicator
for _, vi := range versionInfos {
if vi.Level == ecl {
if (vi.totalDataBytes() * 8) >= (dataBits + int(vi.charCountBits(mode))) {
return vi
}
}
}
return nil
}

115
vendor/github.com/boombuler/barcode/scaledbarcode.go generated vendored Normal file
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package barcode
import (
"errors"
"fmt"
"image"
"image/color"
"math"
)
type wrapFunc func(x, y int) color.Color
type scaledBarcode struct {
wrapped Barcode
wrapperFunc wrapFunc
rect image.Rectangle
}
func (bc *scaledBarcode) Content() string {
return bc.wrapped.Content()
}
func (bc *scaledBarcode) Metadata() Metadata {
return bc.wrapped.Metadata()
}
func (bc *scaledBarcode) ColorModel() color.Model {
return bc.wrapped.ColorModel()
}
func (bc *scaledBarcode) Bounds() image.Rectangle {
return bc.rect
}
func (bc *scaledBarcode) At(x, y int) color.Color {
return bc.wrapperFunc(x, y)
}
func (bc *scaledBarcode) CheckSum() int {
return bc.wrapped.CheckSum()
}
// Scale returns a resized barcode with the given width and height.
func Scale(bc Barcode, width, height int) (Barcode, error) {
switch bc.Metadata().Dimensions {
case 1:
return scale1DCode(bc, width, height)
case 2:
return scale2DCode(bc, width, height)
}
return nil, errors.New("unsupported barcode format")
}
func scale2DCode(bc Barcode, width, height int) (Barcode, error) {
orgBounds := bc.Bounds()
orgWidth := orgBounds.Max.X - orgBounds.Min.X
orgHeight := orgBounds.Max.Y - orgBounds.Min.Y
factor := int(math.Min(float64(width)/float64(orgWidth), float64(height)/float64(orgHeight)))
if factor <= 0 {
return nil, fmt.Errorf("can not scale barcode to an image smaller then %dx%d", orgWidth, orgHeight)
}
offsetX := (width - (orgWidth * factor)) / 2
offsetY := (height - (orgHeight * factor)) / 2
wrap := func(x, y int) color.Color {
if x < offsetX || y < offsetY {
return color.White
}
x = (x - offsetX) / factor
y = (y - offsetY) / factor
if x >= orgWidth || y >= orgHeight {
return color.White
}
return bc.At(x, y)
}
return &scaledBarcode{
bc,
wrap,
image.Rect(0, 0, width, height),
}, nil
}
func scale1DCode(bc Barcode, width, height int) (Barcode, error) {
orgBounds := bc.Bounds()
orgWidth := orgBounds.Max.X - orgBounds.Min.X
factor := int(float64(width) / float64(orgWidth))
if factor <= 0 {
return nil, fmt.Errorf("can not scale barcode to an image smaller then %dx1", orgWidth)
}
offsetX := (width - (orgWidth * factor)) / 2
wrap := func(x, y int) color.Color {
if x < offsetX {
return color.White
}
x = (x - offsetX) / factor
if x >= orgWidth {
return color.White
}
return bc.At(x, 0)
}
return &scaledBarcode{
bc,
wrap,
image.Rect(0, 0, width, height),
}, nil
}

48
vendor/github.com/boombuler/barcode/utils/base1dcode.go generated vendored Normal file
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// Package utils contain some utilities which are needed to create barcodes
package utils
import (
"image"
"image/color"
"github.com/boombuler/barcode"
)
type base1DCode struct {
*BitList
kind string
content string
checksum int
}
func (c *base1DCode) Content() string {
return c.content
}
func (c *base1DCode) Metadata() barcode.Metadata {
return barcode.Metadata{c.kind, 1}
}
func (c *base1DCode) ColorModel() color.Model {
return color.Gray16Model
}
func (c *base1DCode) Bounds() image.Rectangle {
return image.Rect(0, 0, c.Len(), 1)
}
func (c *base1DCode) At(x, y int) color.Color {
if c.GetBit(x) {
return color.Black
}
return color.White
}
func (c *base1DCode) CheckSum() int {
return c.checksum
}
// New1DCode creates a new 1D barcode where the bars are represented by the bits in the bars BitList
func New1DCode(codeKind, content string, bars *BitList, checksum int) barcode.Barcode {
return &base1DCode{bars, codeKind, content, checksum}
}

119
vendor/github.com/boombuler/barcode/utils/bitlist.go generated vendored Normal file
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package utils
// BitList is a list that contains bits
type BitList struct {
count int
data []int32
}
// NewBitList returns a new BitList with the given length
// all bits are initialize with false
func NewBitList(capacity int) *BitList {
bl := new(BitList)
bl.count = capacity
x := 0
if capacity%32 != 0 {
x = 1
}
bl.data = make([]int32, capacity/32+x)
return bl
}
// Len returns the number of contained bits
func (bl *BitList) Len() int {
return bl.count
}
func (bl *BitList) grow() {
growBy := len(bl.data)
if growBy < 128 {
growBy = 128
} else if growBy >= 1024 {
growBy = 1024
}
nd := make([]int32, len(bl.data)+growBy)
copy(nd, bl.data)
bl.data = nd
}
// AddBit appends the given bits to the end of the list
func (bl *BitList) AddBit(bits ...bool) {
for _, bit := range bits {
itmIndex := bl.count / 32
for itmIndex >= len(bl.data) {
bl.grow()
}
bl.SetBit(bl.count, bit)
bl.count++
}
}
// SetBit sets the bit at the given index to the given value
func (bl *BitList) SetBit(index int, value bool) {
itmIndex := index / 32
itmBitShift := 31 - (index % 32)
if value {
bl.data[itmIndex] = bl.data[itmIndex] | 1<<uint(itmBitShift)
} else {
bl.data[itmIndex] = bl.data[itmIndex] & ^(1 << uint(itmBitShift))
}
}
// GetBit returns the bit at the given index
func (bl *BitList) GetBit(index int) bool {
itmIndex := index / 32
itmBitShift := 31 - (index % 32)
return ((bl.data[itmIndex] >> uint(itmBitShift)) & 1) == 1
}
// AddByte appends all 8 bits of the given byte to the end of the list
func (bl *BitList) AddByte(b byte) {
for i := 7; i >= 0; i-- {
bl.AddBit(((b >> uint(i)) & 1) == 1)
}
}
// AddBits appends the last (LSB) 'count' bits of 'b' the the end of the list
func (bl *BitList) AddBits(b int, count byte) {
for i := int(count) - 1; i >= 0; i-- {
bl.AddBit(((b >> uint(i)) & 1) == 1)
}
}
// GetBytes returns all bits of the BitList as a []byte
func (bl *BitList) GetBytes() []byte {
len := bl.count >> 3
if (bl.count % 8) != 0 {
len++
}
result := make([]byte, len)
for i := 0; i < len; i++ {
shift := (3 - (i % 4)) * 8
result[i] = (byte)((bl.data[i/4] >> uint(shift)) & 0xFF)
}
return result
}
// IterateBytes iterates through all bytes contained in the BitList
func (bl *BitList) IterateBytes() <-chan byte {
res := make(chan byte)
go func() {
c := bl.count
shift := 24
i := 0
for c > 0 {
res <- byte((bl.data[i] >> uint(shift)) & 0xFF)
shift -= 8
if shift < 0 {
shift = 24
i++
}
c -= 8
}
close(res)
}()
return res
}

65
vendor/github.com/boombuler/barcode/utils/galoisfield.go generated vendored Normal file
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package utils
// GaloisField encapsulates galois field arithmetics
type GaloisField struct {
Size int
Base int
ALogTbl []int
LogTbl []int
}
// NewGaloisField creates a new galois field
func NewGaloisField(pp, fieldSize, b int) *GaloisField {
result := new(GaloisField)
result.Size = fieldSize
result.Base = b
result.ALogTbl = make([]int, fieldSize)
result.LogTbl = make([]int, fieldSize)
x := 1
for i := 0; i < fieldSize; i++ {
result.ALogTbl[i] = x
x = x * 2
if x >= fieldSize {
x = (x ^ pp) & (fieldSize - 1)
}
}
for i := 0; i < fieldSize; i++ {
result.LogTbl[result.ALogTbl[i]] = int(i)
}
return result
}
func (gf *GaloisField) Zero() *GFPoly {
return NewGFPoly(gf, []int{0})
}
// AddOrSub add or substract two numbers
func (gf *GaloisField) AddOrSub(a, b int) int {
return a ^ b
}
// Multiply multiplys two numbers
func (gf *GaloisField) Multiply(a, b int) int {
if a == 0 || b == 0 {
return 0
}
return gf.ALogTbl[(gf.LogTbl[a]+gf.LogTbl[b])%(gf.Size-1)]
}
// Divide divides two numbers
func (gf *GaloisField) Divide(a, b int) int {
if b == 0 {
panic("divide by zero")
} else if a == 0 {
return 0
}
return gf.ALogTbl[(gf.LogTbl[a]-gf.LogTbl[b])%(gf.Size-1)]
}
func (gf *GaloisField) Invers(num int) int {
return gf.ALogTbl[(gf.Size-1)-gf.LogTbl[num]]
}

103
vendor/github.com/boombuler/barcode/utils/gfpoly.go generated vendored Normal file
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package utils
type GFPoly struct {
gf *GaloisField
Coefficients []int
}
func (gp *GFPoly) Degree() int {
return len(gp.Coefficients) - 1
}
func (gp *GFPoly) Zero() bool {
return gp.Coefficients[0] == 0
}
// GetCoefficient returns the coefficient of x ^ degree
func (gp *GFPoly) GetCoefficient(degree int) int {
return gp.Coefficients[gp.Degree()-degree]
}
func (gp *GFPoly) AddOrSubstract(other *GFPoly) *GFPoly {
if gp.Zero() {
return other
} else if other.Zero() {
return gp
}
smallCoeff := gp.Coefficients
largeCoeff := other.Coefficients
if len(smallCoeff) > len(largeCoeff) {
largeCoeff, smallCoeff = smallCoeff, largeCoeff
}
sumDiff := make([]int, len(largeCoeff))
lenDiff := len(largeCoeff) - len(smallCoeff)
copy(sumDiff, largeCoeff[:lenDiff])
for i := lenDiff; i < len(largeCoeff); i++ {
sumDiff[i] = int(gp.gf.AddOrSub(int(smallCoeff[i-lenDiff]), int(largeCoeff[i])))
}
return NewGFPoly(gp.gf, sumDiff)
}
func (gp *GFPoly) MultByMonominal(degree int, coeff int) *GFPoly {
if coeff == 0 {
return gp.gf.Zero()
}
size := len(gp.Coefficients)
result := make([]int, size+degree)
for i := 0; i < size; i++ {
result[i] = int(gp.gf.Multiply(int(gp.Coefficients[i]), int(coeff)))
}
return NewGFPoly(gp.gf, result)
}
func (gp *GFPoly) Multiply(other *GFPoly) *GFPoly {
if gp.Zero() || other.Zero() {
return gp.gf.Zero()
}
aCoeff := gp.Coefficients
aLen := len(aCoeff)
bCoeff := other.Coefficients
bLen := len(bCoeff)
product := make([]int, aLen+bLen-1)
for i := 0; i < aLen; i++ {
ac := int(aCoeff[i])
for j := 0; j < bLen; j++ {
bc := int(bCoeff[j])
product[i+j] = int(gp.gf.AddOrSub(int(product[i+j]), gp.gf.Multiply(ac, bc)))
}
}
return NewGFPoly(gp.gf, product)
}
func (gp *GFPoly) Divide(other *GFPoly) (quotient *GFPoly, remainder *GFPoly) {
quotient = gp.gf.Zero()
remainder = gp
fld := gp.gf
denomLeadTerm := other.GetCoefficient(other.Degree())
inversDenomLeadTerm := fld.Invers(int(denomLeadTerm))
for remainder.Degree() >= other.Degree() && !remainder.Zero() {
degreeDiff := remainder.Degree() - other.Degree()
scale := int(fld.Multiply(int(remainder.GetCoefficient(remainder.Degree())), inversDenomLeadTerm))
term := other.MultByMonominal(degreeDiff, scale)
itQuot := NewMonominalPoly(fld, degreeDiff, scale)
quotient = quotient.AddOrSubstract(itQuot)
remainder = remainder.AddOrSubstract(term)
}
return
}
func NewMonominalPoly(field *GaloisField, degree int, coeff int) *GFPoly {
if coeff == 0 {
return field.Zero()
}
result := make([]int, degree+1)
result[0] = coeff
return NewGFPoly(field, result)
}
func NewGFPoly(field *GaloisField, coefficients []int) *GFPoly {
for len(coefficients) > 1 && coefficients[0] == 0 {
coefficients = coefficients[1:]
}
return &GFPoly{field, coefficients}
}

44
vendor/github.com/boombuler/barcode/utils/reedsolomon.go generated vendored Normal file
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package utils
import (
"sync"
)
type ReedSolomonEncoder struct {
gf *GaloisField
polynomes []*GFPoly
m *sync.Mutex
}
func NewReedSolomonEncoder(gf *GaloisField) *ReedSolomonEncoder {
return &ReedSolomonEncoder{
gf, []*GFPoly{NewGFPoly(gf, []int{1})}, new(sync.Mutex),
}
}
func (rs *ReedSolomonEncoder) getPolynomial(degree int) *GFPoly {
rs.m.Lock()
defer rs.m.Unlock()
if degree >= len(rs.polynomes) {
last := rs.polynomes[len(rs.polynomes)-1]
for d := len(rs.polynomes); d <= degree; d++ {
next := last.Multiply(NewGFPoly(rs.gf, []int{1, rs.gf.ALogTbl[d-1+rs.gf.Base]}))
rs.polynomes = append(rs.polynomes, next)
last = next
}
}
return rs.polynomes[degree]
}
func (rs *ReedSolomonEncoder) Encode(data []int, eccCount int) []int {
generator := rs.getPolynomial(eccCount)
info := NewGFPoly(rs.gf, data)
info = info.MultByMonominal(eccCount, 1)
_, remainder := info.Divide(generator)
result := make([]int, eccCount)
numZero := int(eccCount) - len(remainder.Coefficients)
copy(result[numZero:], remainder.Coefficients)
return result
}

19
vendor/github.com/boombuler/barcode/utils/runeint.go generated vendored Normal file
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package utils
// RuneToInt converts a rune between '0' and '9' to an integer between 0 and 9
// If the rune is outside of this range -1 is returned.
func RuneToInt(r rune) int {
if r >= '0' && r <= '9' {
return int(r - '0')
}
return -1
}
// IntToRune converts a digit 0 - 9 to the rune '0' - '9'. If the given int is outside
// of this range 'F' is returned!
func IntToRune(i int) rune {
if i >= 0 && i <= 9 {
return rune(i + '0')
}
return 'F'
}

202
vendor/github.com/pquerna/otp/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
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"Legal Entity" shall mean the union of the acting entity and all
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"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
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not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
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the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
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to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
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2. Grant of Copyright License. Subject to the terms and conditions of
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(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
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institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
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7. Disclaimer of Warranty. Unless required by applicable law or
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8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
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the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
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5
vendor/github.com/pquerna/otp/NOTICE generated vendored Normal file
View file

@ -0,0 +1,5 @@
otp
Copyright (c) 2014, Paul Querna
This product includes software developed by
Paul Querna (http://paul.querna.org/).

60
vendor/github.com/pquerna/otp/README.md generated vendored Normal file
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# otp: One Time Password utilities Go / Golang
[![GoDoc](https://godoc.org/github.com/pquerna/otp?status.svg)](https://godoc.org/github.com/pquerna/otp) [![Build Status](https://travis-ci.org/pquerna/otp.svg?branch=master)](https://travis-ci.org/pquerna/otp)
# Why One Time Passwords?
One Time Passwords (OTPs) are an mechanism to improve security over passwords alone. When a Time-based OTP (TOTP) is stored on a user's phone, and combined with something the user knows (Password), you have an easy on-ramp to [Multi-factor authentication](http://en.wikipedia.org/wiki/Multi-factor_authentication) without adding a dependency on a SMS provider. This Password and TOTP combination is used by many popular websites including Google, Github, Facebook, Salesforce and many others.
The `otp` library enables you to easily add TOTPs to your own application, increasing your user's security against mass-password breaches and malware.
Because TOTP is standardized and widely deployed, there are many [mobile clients and software implementations](http://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm#Client_implementations).
## `otp` Supports:
* Generating QR Code images for easy user enrollment.
* Time-based One-time Password Algorithm (TOTP) (RFC 6238): Time based OTP, the most commonly used method.
* HMAC-based One-time Password Algorithm (HOTP) (RFC 4226): Counter based OTP, which TOTP is based upon.
* Generation and Validation of codes for either algorithm.
## Implementing TOTP in your application:
### User Enrollment
For an example of a working enrollment work flow, [Github has documented theirs](https://help.github.com/articles/configuring-two-factor-authentication-via-a-totp-mobile-app/
), but the basics are:
1. Generate new TOTP Key for a User. `key,_ := totp.Generate(...)`.
1. Display the Key's Secret and QR-Code for the User. `key.Secret()` and `key.Image(...)`.
1. Test that the user can successfully use their TOTP. `totp.Validate(...)`.
1. Store TOTP Secret for the User in your backend. `key.Secret()`
1. Provide the user with "recovery codes". (See Recovery Codes bellow)
### Code Generation
* In either TOTP or HOTP cases, use the `GenerateCode` function and a counter or
`time.Time` struct to generate a valid code compatible with most implementations.
* For uncommon or custom settings, or to catch unlikely errors, use `GenerateCodeCustom`
in either module.
### Validation
1. Prompt and validate User's password as normal.
1. If the user has TOTP enabled, prompt for TOTP passcode.
1. Retrieve the User's TOTP Secret from your backend.
1. Validate the user's passcode. `totp.Validate(...)`
### Recovery Codes
When a user loses access to their TOTP device, they would no longer have access to their account. Because TOTPs are often configured on mobile devices that can be lost, stolen or damaged, this is a common problem. For this reason many providers give their users "backup codes" or "recovery codes". These are a set of one time use codes that can be used instead of the TOTP. These can simply be randomly generated strings that you store in your backend. [Github's documentation provides an overview of the user experience](
https://help.github.com/articles/downloading-your-two-factor-authentication-recovery-codes/).
## Improvements, bugs, adding feature, etc:
Please [open issues in Github](https://github.com/pquerna/otp/issues) for ideas, bugs, and general thoughts. Pull requests are of course preferred :)
## License
`otp` is licensed under the [Apache License, Version 2.0](./LICENSE)

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/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package otp implements both HOTP and TOTP based
// one time passcodes in a Google Authenticator compatible manner.
//
// When adding a TOTP for a user, you must store the "secret" value
// persistently. It is recommend to store the secret in an encrypted field in your
// datastore. Due to how TOTP works, it is not possible to store a hash
// for the secret value like you would a password.
//
// To enroll a user, you must first generate an OTP for them. Google
// Authenticator supports using a QR code as an enrollment method:
//
// import (
// "github.com/pquerna/otp/totp"
//
// "bytes"
// "image/png"
// )
//
// key, err := totp.Generate(totp.GenerateOpts{
// Issuer: "Example.com",
// AccountName: "alice@example.com",
// })
//
// // Convert TOTP key into a QR code encoded as a PNG image.
// var buf bytes.Buffer
// img, err := key.Image(200, 200)
// png.Encode(&buf, img)
//
// // display the QR code to the user.
// display(buf.Bytes())
//
// // Now Validate that the user's successfully added the passcode.
// passcode := promptForPasscode()
// valid := totp.Validate(passcode, key.Secret())
//
// if valid {
// // User successfully used their TOTP, save it to your backend!
// storeSecret("alice@example.com", key.Secret())
// }
//
// Validating a TOTP passcode is very easy, just prompt the user for a passcode
// and retrieve the associated user's previously stored secret.
// import "github.com/pquerna/otp/totp"
//
// passcode := promptForPasscode()
// secret := getSecret("alice@example.com")
//
// valid := totp.Validate(passcode, secret)
//
// if valid {
// // Success! continue login process.
// }
package otp

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/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package hotp
import (
"github.com/pquerna/otp"
"crypto/hmac"
"crypto/rand"
"crypto/subtle"
"encoding/base32"
"encoding/binary"
"fmt"
"math"
"net/url"
"strings"
)
const debug = false
// Validate a HOTP passcode given a counter and secret.
// This is a shortcut for ValidateCustom, with parameters that
// are compataible with Google-Authenticator.
func Validate(passcode string, counter uint64, secret string) bool {
rv, _ := ValidateCustom(
passcode,
counter,
secret,
ValidateOpts{
Digits: otp.DigitsSix,
Algorithm: otp.AlgorithmSHA1,
},
)
return rv
}
// ValidateOpts provides options for ValidateCustom().
type ValidateOpts struct {
// Digits as part of the input. Defaults to 6.
Digits otp.Digits
// Algorithm to use for HMAC. Defaults to SHA1.
Algorithm otp.Algorithm
}
// GenerateCode creates a HOTP passcode given a counter and secret.
// This is a shortcut for GenerateCodeCustom, with parameters that
// are compataible with Google-Authenticator.
func GenerateCode(secret string, counter uint64) (string, error) {
return GenerateCodeCustom(secret, counter, ValidateOpts{
Digits: otp.DigitsSix,
Algorithm: otp.AlgorithmSHA1,
})
}
// GenerateCodeCustom uses a counter and secret value and options struct to
// create a passcode.
func GenerateCodeCustom(secret string, counter uint64, opts ValidateOpts) (passcode string, err error) {
secretBytes, err := base32.StdEncoding.DecodeString(secret)
if err != nil {
return "", otp.ErrValidateSecretInvalidBase32
}
buf := make([]byte, 8)
mac := hmac.New(opts.Algorithm.Hash, secretBytes)
binary.BigEndian.PutUint64(buf, counter)
if debug {
fmt.Printf("counter=%v\n", counter)
fmt.Printf("buf=%v\n", buf)
}
mac.Write(buf)
sum := mac.Sum(nil)
// "Dynamic truncation" in RFC 4226
// http://tools.ietf.org/html/rfc4226#section-5.4
offset := sum[len(sum)-1] & 0xf
value := int64(((int(sum[offset]) & 0x7f) << 24) |
((int(sum[offset+1] & 0xff)) << 16) |
((int(sum[offset+2] & 0xff)) << 8) |
(int(sum[offset+3]) & 0xff))
l := opts.Digits.Length()
mod := int32(value % int64(math.Pow10(l)))
if debug {
fmt.Printf("offset=%v\n", offset)
fmt.Printf("value=%v\n", value)
fmt.Printf("mod'ed=%v\n", mod)
}
return opts.Digits.Format(mod), nil
}
// ValidateCustom validates an HOTP with customizable options. Most users should
// use Validate().
func ValidateCustom(passcode string, counter uint64, secret string, opts ValidateOpts) (bool, error) {
passcode = strings.TrimSpace(passcode)
if len(passcode) != opts.Digits.Length() {
return false, otp.ErrValidateInputInvalidLength
}
otpstr, err := GenerateCodeCustom(secret, counter, opts)
if err != nil {
return false, err
}
if subtle.ConstantTimeCompare([]byte(otpstr), []byte(passcode)) == 1 {
return true, nil
}
return false, nil
}
// GenerateOpts provides options for .Generate()
type GenerateOpts struct {
// Name of the issuing Organization/Company.
Issuer string
// Name of the User's Account (eg, email address)
AccountName string
// Size in size of the generated Secret. Defaults to 10 bytes.
SecretSize uint
// Digits to request. Defaults to 6.
Digits otp.Digits
// Algorithm to use for HMAC. Defaults to SHA1.
Algorithm otp.Algorithm
}
// Generate creates a new HOTP Key.
func Generate(opts GenerateOpts) (*otp.Key, error) {
// url encode the Issuer/AccountName
if opts.Issuer == "" {
return nil, otp.ErrGenerateMissingIssuer
}
if opts.AccountName == "" {
return nil, otp.ErrGenerateMissingAccountName
}
if opts.SecretSize == 0 {
opts.SecretSize = 10
}
// otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example
v := url.Values{}
secret := make([]byte, opts.SecretSize)
_, err := rand.Read(secret)
if err != nil {
return nil, err
}
v.Set("secret", base32.StdEncoding.EncodeToString(secret))
v.Set("issuer", opts.Issuer)
v.Set("algorithm", opts.Algorithm.String())
v.Set("digits", opts.Digits.String())
u := url.URL{
Scheme: "otpauth",
Host: "hotp",
Path: "/" + opts.Issuer + ":" + opts.AccountName,
RawQuery: v.Encode(),
}
return otp.NewKeyFromURL(u.String())
}

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/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package otp
import (
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/qr"
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"errors"
"fmt"
"hash"
"image"
"net/url"
"strings"
)
// Error when attempting to convert the secret from base32 to raw bytes.
var ErrValidateSecretInvalidBase32 = errors.New("Decoding of secret as base32 failed.")
// The user provided passcode length was not expected.
var ErrValidateInputInvalidLength = errors.New("Input length unexpected")
// When generating a Key, the Issuer must be set.
var ErrGenerateMissingIssuer = errors.New("Issuer must be set")
// When generating a Key, the Account Name must be set.
var ErrGenerateMissingAccountName = errors.New("AccountName must be set")
// Key represents an TOTP or HTOP key.
type Key struct {
orig string
url *url.URL
}
// NewKeyFromURL creates a new Key from an TOTP or HOTP url.
//
// The URL format is documented here:
// https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
//
func NewKeyFromURL(orig string) (*Key, error) {
u, err := url.Parse(orig)
if err != nil {
return nil, err
}
return &Key{
orig: orig,
url: u,
}, nil
}
func (k *Key) String() string {
return k.orig
}
// Image returns an QR-Code image of the specified width and height,
// suitable for use by many clients like Google-Authenricator
// to enroll a user's TOTP/HOTP key.
func (k *Key) Image(width int, height int) (image.Image, error) {
b, err := qr.Encode(k.orig, qr.M, qr.Auto)
if err != nil {
return nil, err
}
b, err = barcode.Scale(b, width, height)
if err != nil {
return nil, err
}
return b, nil
}
// Type returns "hotp" or "totp".
func (k *Key) Type() string {
return k.url.Host
}
// Issuer returns the name of the issuing organization.
func (k *Key) Issuer() string {
q := k.url.Query()
issuer := q.Get("issuer")
if issuer != "" {
return issuer
}
p := strings.TrimPrefix(k.url.Path, "/")
i := strings.Index(p, ":")
if i == -1 {
return ""
}
return p[:i]
}
// AccountName returns the name of the user's account.
func (k *Key) AccountName() string {
p := strings.TrimPrefix(k.url.Path, "/")
i := strings.Index(p, ":")
if i == -1 {
return p
}
return p[i+1:]
}
// Secret returns the opaque secret for this Key.
func (k *Key) Secret() string {
q := k.url.Query()
return q.Get("secret")
}
// Algorithm represents the hashing function to use in the HMAC
// operation needed for OTPs.
type Algorithm int
const (
AlgorithmSHA1 Algorithm = iota
AlgorithmSHA256
AlgorithmSHA512
AlgorithmMD5
)
func (a Algorithm) String() string {
switch a {
case AlgorithmSHA1:
return "SHA1"
case AlgorithmSHA256:
return "SHA256"
case AlgorithmSHA512:
return "SHA512"
case AlgorithmMD5:
return "MD5"
}
panic("unreached")
}
func (a Algorithm) Hash() hash.Hash {
switch a {
case AlgorithmSHA1:
return sha1.New()
case AlgorithmSHA256:
return sha256.New()
case AlgorithmSHA512:
return sha512.New()
case AlgorithmMD5:
return md5.New()
}
panic("unreached")
}
// Digits represents the number of digits present in the
// user's OTP passcode. Six and Eight are the most common values.
type Digits int
const (
DigitsSix Digits = 6
DigitsEight Digits = 8
)
// Format converts an integer into the zero-filled size for this Digits.
func (d Digits) Format(in int32) string {
f := fmt.Sprintf("%%0%dd", d)
return fmt.Sprintf(f, in)
}
// Length returns the number of characters for this Digits.
func (d Digits) Length() int {
return int(d)
}
func (d Digits) String() string {
return fmt.Sprintf("%d", d)
}

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@ -0,0 +1,191 @@
/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package totp
import (
"github.com/pquerna/otp"
"github.com/pquerna/otp/hotp"
"crypto/rand"
"encoding/base32"
"math"
"net/url"
"strconv"
"time"
)
// Validate a TOTP using the current time.
// A shortcut for ValidateCustom, Validate uses a configuration
// that is compatible with Google-Authenticator and most clients.
func Validate(passcode string, secret string) bool {
rv, _ := ValidateCustom(
passcode,
secret,
time.Now().UTC(),
ValidateOpts{
Period: 30,
Skew: 1,
Digits: otp.DigitsSix,
Algorithm: otp.AlgorithmSHA1,
},
)
return rv
}
// GenerateCode creates a TOTP token using the current time.
// A shortcut for GenerateCodeCustom, GenerateCode uses a configuration
// that is compatible with Google-Authenticator and most clients.
func GenerateCode(secret string, t time.Time) (string, error) {
return GenerateCodeCustom(secret, t, ValidateOpts{
Period: 30,
Skew: 1,
Digits: otp.DigitsSix,
Algorithm: otp.AlgorithmSHA1,
})
}
// ValidateOpts provides options for ValidateCustom().
type ValidateOpts struct {
// Number of seconds a TOTP hash is valid for. Defaults to 30 seconds.
Period uint
// Periods before or after the current time to allow. Value of 1 allows up to Period
// of either side of the specified time. Defaults to 0 allowed skews. Values greater
// than 1 are likely sketchy.
Skew uint
// Digits as part of the input. Defaults to 6.
Digits otp.Digits
// Algorithm to use for HMAC. Defaults to SHA1.
Algorithm otp.Algorithm
}
// GenerateCodeCustom takes a timepoint and produces a passcode using a
// secret and the provided opts. (Under the hood, this is making an adapted
// call to hotp.GenerateCodeCustom)
func GenerateCodeCustom(secret string, t time.Time, opts ValidateOpts) (passcode string, err error) {
if opts.Period == 0 {
opts.Period = 30
}
counter := uint64(math.Floor(float64(t.Unix()) / float64(opts.Period)))
passcode, err = hotp.GenerateCodeCustom(secret, counter, hotp.ValidateOpts{
Digits: opts.Digits,
Algorithm: opts.Algorithm,
})
if err != nil {
return "", err
}
return passcode, nil
}
// ValidateCustom validates a TOTP given a user specified time and custom options.
// Most users should use Validate() to provide an interpolatable TOTP experience.
func ValidateCustom(passcode string, secret string, t time.Time, opts ValidateOpts) (bool, error) {
if opts.Period == 0 {
opts.Period = 30
}
counters := []uint64{}
counter := int64(math.Floor(float64(t.Unix()) / float64(opts.Period)))
counters = append(counters, uint64(counter))
for i := 1; i <= int(opts.Skew); i++ {
counters = append(counters, uint64(counter+int64(i)))
counters = append(counters, uint64(counter-int64(i)))
}
for _, counter := range counters {
rv, err := hotp.ValidateCustom(passcode, counter, secret, hotp.ValidateOpts{
Digits: opts.Digits,
Algorithm: opts.Algorithm,
})
if err != nil {
return false, err
}
if rv == true {
return true, nil
}
}
return false, nil
}
// GenerateOpts provides options for Generate(). The default values
// are compatible with Google-Authenticator.
type GenerateOpts struct {
// Name of the issuing Organization/Company.
Issuer string
// Name of the User's Account (eg, email address)
AccountName string
// Number of seconds a TOTP hash is valid for. Defaults to 30 seconds.
Period uint
// Size in size of the generated Secret. Defaults to 10 bytes.
SecretSize uint
// Digits to request. Defaults to 6.
Digits otp.Digits
// Algorithm to use for HMAC. Defaults to SHA1.
Algorithm otp.Algorithm
}
// Generate a new TOTP Key.
func Generate(opts GenerateOpts) (*otp.Key, error) {
// url encode the Issuer/AccountName
if opts.Issuer == "" {
return nil, otp.ErrGenerateMissingIssuer
}
if opts.AccountName == "" {
return nil, otp.ErrGenerateMissingAccountName
}
if opts.Period == 0 {
opts.Period = 30
}
if opts.SecretSize == 0 {
opts.SecretSize = 10
}
if opts.Digits == 0 {
opts.Digits = otp.DigitsSix
}
// otpauth://totp/Example:alice@google.com?secret=JBSWY3DPEHPK3PXP&issuer=Example
v := url.Values{}
secret := make([]byte, opts.SecretSize)
_, err := rand.Read(secret)
if err != nil {
return nil, err
}
v.Set("secret", base32.StdEncoding.EncodeToString(secret))
v.Set("issuer", opts.Issuer)
v.Set("period", strconv.FormatUint(uint64(opts.Period), 10))
v.Set("algorithm", opts.Algorithm.String())
v.Set("digits", opts.Digits.String())
u := url.URL{
Scheme: "otpauth",
Host: "totp",
Path: "/" + opts.Issuer + ":" + opts.AccountName,
RawQuery: v.Encode(),
}
return otp.NewKeyFromURL(u.String())
}

36
vendor/vendor.json vendored
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@ -50,6 +50,24 @@
"revision": "831b652a7f8dbefaf94da0eb66abd46c0c4bcf23",
"revisionTime": "2016-03-26T03:18:27Z"
},
{
"checksumSHA1": "NClRfzxXDSt/g4lM5BIkKhYRVoQ=",
"path": "github.com/boombuler/barcode",
"revision": "fe0f26ff6d26693948ee8189aa064ee8c54141fa",
"revisionTime": "2016-12-26T21:19:16Z"
},
{
"checksumSHA1": "ion36oiOlMelz8OcoyPCHzMQNYY=",
"path": "github.com/boombuler/barcode/qr",
"revision": "fe0f26ff6d26693948ee8189aa064ee8c54141fa",
"revisionTime": "2016-12-26T21:19:16Z"
},
{
"checksumSHA1": "CxHIsJBPkKrTK1pfNM0VV0oow4o=",
"path": "github.com/boombuler/barcode/utils",
"revision": "fe0f26ff6d26693948ee8189aa064ee8c54141fa",
"revisionTime": "2016-12-26T21:19:16Z"
},
{
"checksumSHA1": "fNAC4qgZDqF3kxq74/yyk3PWdy8=",
"path": "github.com/bradfitz/gomemcache/memcache",
@ -740,6 +758,24 @@
"revision": "976c720a22c8eb4eb6a0b4348ad85ad12491a506",
"revisionTime": "2016-09-25T22:06:09Z"
},
{
"checksumSHA1": "pcKYSF+UN342M6Y+GSL5QhqKVk0=",
"path": "github.com/pquerna/otp",
"revision": "54653902c20e47f3417541d35435cb6d6162e28a",
"revisionTime": "2016-09-12T16:18:15Z"
},
{
"checksumSHA1": "UL3g+cyh3ufwt0tP0dvwbbjLX+c=",
"path": "github.com/pquerna/otp/hotp",
"revision": "54653902c20e47f3417541d35435cb6d6162e28a",
"revisionTime": "2016-09-12T16:18:15Z"
},
{
"checksumSHA1": "Ie55pTQw1rnOZ8KDekSDXUWDT1I=",
"path": "github.com/pquerna/otp/totp",
"revision": "54653902c20e47f3417541d35435cb6d6162e28a",
"revisionTime": "2016-09-12T16:18:15Z"
},
{
"checksumSHA1": "c7jHQZk5ZEsFR9EXsWJXkszPBZA=",
"path": "github.com/russross/blackfriday",