diff options
Diffstat (limited to 'routers/web/user/setting/security_twofa.go')
| -rw-r--r-- | routers/web/user/setting/security_twofa.go | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/routers/web/user/setting/security_twofa.go b/routers/web/user/setting/security_twofa.go new file mode 100644 index 0000000000..7b08a05939 --- /dev/null +++ b/routers/web/user/setting/security_twofa.go @@ -0,0 +1,250 @@ +// 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" + "net/http" + "strings" + + "code.gitea.io/gitea/models" + "code.gitea.io/gitea/modules/context" + "code.gitea.io/gitea/modules/log" + "code.gitea.io/gitea/modules/setting" + "code.gitea.io/gitea/modules/web" + "code.gitea.io/gitea/services/forms" + + "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 { + if models.IsErrTwoFactorNotEnrolled(err) { + ctx.Flash.Error(ctx.Tr("setting.twofa_not_enrolled")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") + } + ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err) + return + } + + token, err := t.GenerateScratchToken() + if err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to GenerateScratchToken", err) + return + } + + if err = models.UpdateTwoFactor(t); err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to UpdateTwoFactor", 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 { + if models.IsErrTwoFactorNotEnrolled(err) { + ctx.Flash.Error(ctx.Tr("setting.twofa_not_enrolled")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") + } + ctx.ServerError("SettingsTwoFactor: Failed to GetTwoFactorByUID", err) + return + } + + if err = models.DeleteTwoFactorByID(t.ID, ctx.User.ID); err != nil { + if models.IsErrTwoFactorNotEnrolled(err) { + // There is a potential DB race here - we must have been disabled by another request in the intervening period + ctx.Flash.Success(ctx.Tr("settings.twofa_disabled")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") + } + ctx.ServerError("SettingsTwoFactor: Failed to DeleteTwoFactorByID", 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)) + if err != nil { + ctx.ServerError("SettingsTwoFactor: Failed NewKeyFromURL: ", err) + return false + } + } + // Filter unsafe character ':' in issuer + issuer := strings.ReplaceAll(setting.AppName+" ("+setting.Domain+")", ":", "") + if otpKey == nil { + otpKey, err = totp.Generate(totp.GenerateOpts{ + SecretSize: 40, + Issuer: issuer, + AccountName: ctx.User.Name, + }) + if err != nil { + ctx.ServerError("SettingsTwoFactor: totpGenerate Failed", err) + return false + } + } + + ctx.Data["TwofaSecret"] = otpKey.Secret() + img, err := otpKey.Image(320, 240) + if err != nil { + ctx.ServerError("SettingsTwoFactor: otpKey image generation failed", err) + return false + } + + var imgBytes bytes.Buffer + if err = png.Encode(&imgBytes, img); err != nil { + ctx.ServerError("SettingsTwoFactor: otpKey png encoding failed", err) + return false + } + + ctx.Data["QrUri"] = template.URL("data:image/png;base64," + base64.StdEncoding.EncodeToString(imgBytes.Bytes())) + + if err := ctx.Session.Set("twofaSecret", otpKey.Secret()); err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to set session for twofaSecret", err) + return false + } + + if err := ctx.Session.Set("twofaUri", otpKey.String()); err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to set session for twofaUri", err) + return false + } + + // Here we're just going to try to release the session early + if err := ctx.Session.Release(); err != nil { + // we'll tolerate errors here as they *should* get saved elsewhere + log.Error("Unable to save changes to the session: %v", err) + } + 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 - we should redirect back! + log.Warn("Trying to re-enroll %-v in twofa when already enrolled", ctx.User) + ctx.Flash.Error(ctx.Tr("setting.twofa_is_enrolled")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") + return + } + if err != nil && !models.IsErrTwoFactorNotEnrolled(err) { + ctx.ServerError("SettingsTwoFactor: GetTwoFactorByUID", err) + return + } + + if !twofaGenerateSecretAndQr(ctx) { + return + } + + ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll) +} + +// EnrollTwoFactorPost handles enrolling the user into 2FA. +func EnrollTwoFactorPost(ctx *context.Context) { + form := web.GetForm(ctx).(*forms.TwoFactorAuthForm) + ctx.Data["Title"] = ctx.Tr("settings") + ctx.Data["PageIsSettingsSecurity"] = true + + t, err := models.GetTwoFactorByUID(ctx.User.ID) + if t != nil { + // already enrolled + ctx.Flash.Error(ctx.Tr("setting.twofa_is_enrolled")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") + return + } + if err != nil && !models.IsErrTwoFactorNotEnrolled(err) { + ctx.ServerError("SettingsTwoFactor: Failed to check if already enrolled with GetTwoFactorByUID", err) + return + } + + if ctx.HasError() { + if !twofaGenerateSecretAndQr(ctx) { + return + } + ctx.HTML(http.StatusOK, tplSettingsTwofaEnroll) + return + } + + secretRaw := ctx.Session.Get("twofaSecret") + if secretRaw == nil { + ctx.Flash.Error(ctx.Tr("settings.twofa_failed_get_secret")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security/two_factor/enroll") + return + } + + secret := secretRaw.(string) + if !totp.Validate(form.Passcode, secret) { + if !twofaGenerateSecretAndQr(ctx) { + return + } + ctx.Flash.Error(ctx.Tr("settings.passcode_invalid")) + ctx.Redirect(setting.AppSubURL + "/user/settings/security/two_factor/enroll") + return + } + + t = &models.TwoFactor{ + UID: ctx.User.ID, + } + err = t.SetSecret(secret) + if err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to set secret", err) + return + } + token, err := t.GenerateScratchToken() + if err != nil { + ctx.ServerError("SettingsTwoFactor: Failed to generate scratch token", err) + return + } + + // Now we have to delete the secrets - because if we fail to insert then it's highly likely that they have already been used + // If we can detect the unique constraint failure below we can move this to after the NewTwoFactor + if err := ctx.Session.Delete("twofaSecret"); err != nil { + // tolerate this failure - it's more important to continue + log.Error("Unable to delete twofaSecret from the session: Error: %v", err) + } + if err := ctx.Session.Delete("twofaUri"); err != nil { + // tolerate this failure - it's more important to continue + log.Error("Unable to delete twofaUri from the session: Error: %v", err) + } + if err := ctx.Session.Release(); err != nil { + // tolerate this failure - it's more important to continue + log.Error("Unable to save changes to the session: %v", err) + } + + if err = models.NewTwoFactor(t); err != nil { + // FIXME: We need to handle a unique constraint fail here it's entirely possible that another request has beaten us. + // If there is a unique constraint fail we should just tolerate the error + ctx.ServerError("SettingsTwoFactor: Failed to save two factor", err) + return + } + + ctx.Flash.Success(ctx.Tr("settings.twofa_enrolled", token)) + ctx.Redirect(setting.AppSubURL + "/user/settings/security") +} |