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gitea/routers/user/setting/security_twofa.go

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// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2018 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 setting
import (
"bytes"
"encoding/base64"
"html/template"
"image/png"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/setting"
"github.com/pquerna/otp"
"github.com/pquerna/otp/totp"
)
// RegenerateScratchTwoFactor regenerates the user's 2FA scratch code.
func RegenerateScratchTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
token, err := t.GenerateScratchToken()
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
if err = models.UpdateTwoFactor(t); err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_scratch_token_regenerated", token))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
// DisableTwoFactor deletes the user's 2FA settings.
func DisableTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
if err = models.DeleteTwoFactorByID(t.ID, ctx.User.ID); err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_disabled"))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}
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))
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if err != nil {
ctx.ServerError("SettingsTwoFactor: NewKeyFromURL: ", err)
return false
}
}
// Filter unsafe character ':' in issuer
issuer := strings.Replace(setting.AppName+" ("+setting.Domain+")", ":", "", -1)
if otpKey == nil {
otpKey, err = totp.Generate(totp.GenerateOpts{
SecretSize: 40,
Issuer: issuer,
AccountName: ctx.User.Name,
})
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return false
}
}
ctx.Data["TwofaSecret"] = otpKey.Secret()
img, err := otpKey.Image(320, 240)
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return false
}
var imgBytes bytes.Buffer
if err = png.Encode(&imgBytes, img); err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return false
}
ctx.Data["QrUri"] = template.URL("data:image/png;base64," + base64.StdEncoding.EncodeToString(imgBytes.Bytes()))
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err = ctx.Session.Set("twofaSecret", otpKey.Secret())
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return false
}
err = ctx.Session.Set("twofaUri", otpKey.String())
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return false
}
return true
}
// EnrollTwoFactor shows the page where the user can enroll into 2FA.
func EnrollTwoFactor(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if t != nil {
// already enrolled
ctx.ServerError("SettingsTwoFactor", err)
return
}
if err != nil && !models.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("SettingsTwoFactor", err)
return
}
if !twofaGenerateSecretAndQr(ctx) {
return
}
ctx.HTML(200, tplSettingsTwofaEnroll)
}
// EnrollTwoFactorPost handles enrolling the user into 2FA.
func EnrollTwoFactorPost(ctx *context.Context, form auth.TwoFactorAuthForm) {
ctx.Data["Title"] = ctx.Tr("settings")
ctx.Data["PageIsSettingsSecurity"] = true
t, err := models.GetTwoFactorByUID(ctx.User.ID)
if t != nil {
// already enrolled
ctx.ServerError("SettingsTwoFactor", err)
return
}
if err != nil && !models.IsErrTwoFactorNotEnrolled(err) {
ctx.ServerError("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.ServerError("SettingsTwoFactor", err)
return
}
token, err := t.GenerateScratchToken()
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
if err = models.NewTwoFactor(t); err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
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err = ctx.Session.Delete("twofaSecret")
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
err = ctx.Session.Delete("twofaUri")
if err != nil {
ctx.ServerError("SettingsTwoFactor", err)
return
}
ctx.Flash.Success(ctx.Tr("settings.twofa_enrolled", token))
ctx.Redirect(setting.AppSubURL + "/user/settings/security")
}