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Scratch codes can only be ussed once now (#6)

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This commit is contained in:
Adora Laura Kalb 2024-05-06 15:32:53 +02:00
parent e6073c9023
commit cfccdc7caf
Signed by: adoralaura
SSH key fingerprint: SHA256:3XrkbR8ikAZJVtYfaUliX1MhmJYVAe/ocIb/MiDHBJ8
7 changed files with 104 additions and 26 deletions
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5
internal/db/initialize.go
View file

@ -46,6 +46,11 @@ func InitializeDB() error {
return fmt.Errorf("[DB] couldn't create database: [%w]", err)
}
_, err = models.DB.NewCreateTable().IfNotExists().Model((*models.MFAScratchCode)(nil)).Exec(context.Background())
if err != nil {
return fmt.Errorf("[DB] couldn't create database: [%w]", err)
}
err = doMigrations()
if err != nil {
return fmt.Errorf("[DB] Error during Migrations: [%w]", err)

15
internal/db/multifactor.go
View file

@ -18,3 +18,18 @@ func UserHasMFA(user models.User) (bool, error) {
}
return false, nil
}
// ScratchCodeUnique checks the database if the generated scratch code
// is unique (not in the database yet)
func ScratchCodeIsUnique(scratchcode string) bool {
var dbitem models.MFAScratchCode
numrows, err := models.DB.NewSelect().Model(&dbitem).Where("code = ?", scratchcode).Count(context.Background())
if err != nil {
return false
}
if numrows != 0 {
return false
}
return true
}

28
internal/web/multifactor-login.go
View file

@ -2,6 +2,7 @@ package web
import (
"context"
"fmt"
"log"
"slices"
@ -45,20 +46,28 @@ func HandleAdminLoginMFAPost(c *fiber.Ctx) error {
}
// check token/scratch validity
var passcodeIsValid bool
var scratchcodeIsValid bool
if istotp {
passcodeIsValid = checkTotpIsValid(token.Token, user)
scratchcodeIsValid = checkTotpIsValid(token.Token, user)
} else {
passcodeIsValid = checkScratchIsValid(token.Token, user)
scratchcodeIsValid = checkScratchIsValid(token.Token, user)
}
if passcodeIsValid {
if scratchcodeIsValid {
err = misc.SetLoginCookie(c, user, constants.LoginCookieExpiryDuration)
if err != nil {
log.Printf("[HandleAdminLoginPost] Error setting cookie: %q\n", err)
return misc.New500Error()
}
_, err = models.DB.NewUpdate().
Model(&models.MFAScratchCode{Code: token.Token, IsUsed: true}).
OmitZero().WherePK().Exec(context.Background())
if err != nil {
fmt.Printf("[HandleAdminLoginMFAPost] Error marking scratch code as used: %v\n", err.Error())
return fiber.NewError(fiber.StatusInternalServerError, "500 Internal Server Error")
}
c.Status(fiber.StatusOK)
return nil
}
@ -81,16 +90,21 @@ func checkTotpIsValid(passcode string, user models.User) bool {
}
func checkScratchIsValid(scratch string, user models.User) bool {
var mfaconfig models.MFAConfig
var scratchcodes []models.MFAScratchCode
err := models.DB.NewSelect().Model(&mfaconfig).Where("username = ?", user.UserName).Scan(context.Background())
err := models.DB.NewSelect().Model(&scratchcodes).Where("username = ?", user.UserName).Where("is_used = ?", false).Scan(context.Background())
if err != nil {
log.Printf("Error getting MFA config for %v from DB: %v\n", user.UserName, err.Error())
// TODO: Debug logging
return false
}
return slices.Contains(mfaconfig.RecoveryCodes, scratch)
var scratchcodeSlice []string
for _, code := range scratchcodes {
scratchcodeSlice = append(scratchcodeSlice, code.Code)
}
return slices.Contains(scratchcodeSlice, scratch)
}
func HandleAdminLoginMFAGet(c *fiber.Ctx) error {

58
internal/web/setup-multifactor.go
View file

@ -5,6 +5,7 @@ import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"image/png"
"log"
"strconv"
@ -18,12 +19,6 @@ import (
"github.com/pquerna/otp/totp"
)
type mfaSetupResponse struct {
Error bool `json:"error"`
Message string `json:"message,omitempty"`
RecoveryTokens []string `json:"recoverytokens,omitempty"`
}
func HandleAdminAccountMFASetupGet(c *fiber.Ctx) error {
if !db.IsCookieValid(c.Cookies(constants.LoginCookieName, "")) {
c.Location("/admin/")
@ -36,15 +31,33 @@ func HandleAdminAccountMFASetupGet(c *fiber.Ctx) error {
mfaconfig.Active = false
mfaconfig.ExpiresAt = time.Now().Add(15 * time.Minute)
for i := 0; i < 6; i++ {
mfaconfig.RecoveryCodes = append(mfaconfig.RecoveryCodes, misc.RandomString(8))
}
user, err := db.GetUserFromCookie(c.Cookies(constants.LoginCookieName))
if err != nil {
log.Println(err)
fiber.NewError(fiber.StatusInternalServerError, "500 Internal Server Error")
}
scratchcodes := []models.MFAScratchCode{}
scratchcodeFailed := 0
// generate four unique(!) scratch codes for the user
for len(scratchcodes) != 4 {
if scratchcodeFailed > 15 {
//TODO: structurized error logging
fmt.Println("[HandleAdminAccountMFASetupPost] Failed to generate unique scratch code 15 times! Aborting")
return misc.New500Error()
}
code := misc.RandomString(8)
if db.ScratchCodeIsUnique(code) {
scratchcodes = append(scratchcodes, models.MFAScratchCode{
IsUsed: false, Code: code, UserName: user.UserName})
} else {
scratchcodeFailed++
}
}
mfaconfig.UserName = user.UserName
key, err := totp.Generate(totp.GenerateOpts{
@ -71,6 +84,12 @@ func HandleAdminAccountMFASetupGet(c *fiber.Ctx) error {
mfaobject.Image = base64img
_, err = models.DB.NewInsert().Model(&scratchcodes).Exec(context.Background())
if err != nil {
log.Printf("[HandleAdminAccountMFASetupGet] Error inserting scratch codes to DB: %q\n", err)
fiber.NewError(fiber.StatusInternalServerError, "500 Internal Server Error")
}
_, err = models.DB.NewInsert().Model(&mfaconfig).Exec(context.Background())
if err != nil {
log.Printf("[HandleAdminAccountMFASetupGet] Error inserting mfaconfig to DB: %q\n", err)
@ -88,11 +107,12 @@ func HandleAdminAccountMFASetupPost(c *fiber.Ctx) error {
return nil
}
var response mfaSetupResponse
var response models.MFASetupResponse
response.Error = true
var token models.TokenRequest
var config models.MFAConfig
var scratchcodes []models.MFAScratchCode
//var user models.User
err := json.Unmarshal(c.Body(), &token)
@ -115,7 +135,7 @@ func HandleAdminAccountMFASetupPost(c *fiber.Ctx) error {
err = models.DB.NewSelect().Model(&config).Where("id = ?", setupcookie).Scan(context.Background())
if err != nil {
log.Printf("[HandleAdminAccountMFASetupGet] Error getting MFAConfig from DB: %q\n", err)
log.Printf("[HandleAdminAccountMFASetupPost] Error getting MFAConfig from DB: %q\n", err)
return fiber.NewError(fiber.StatusInternalServerError, "500 Internal Server Error")
}
@ -123,7 +143,19 @@ func HandleAdminAccountMFASetupPost(c *fiber.Ctx) error {
if totpvalid {
response.Error = false
response.Message = "Multifactor authentication was successfully set up!"
response.RecoveryTokens = config.RecoveryCodes
err = models.DB.NewSelect().Model(&scratchcodes).Where("username = ?", config.UserName).Scan(context.Background())
if err != nil {
log.Printf("[HandleAdminAccountMFASetupPost] Error getting MFA scratch codes from DB: %q\n", err)
return fiber.NewError(fiber.StatusInternalServerError, "500 Internal Server Error")
}
var scratchcodeSlice []string
for _, code := range scratchcodes {
scratchcodeSlice = append(scratchcodeSlice, code.Code)
}
response.RecoveryTokens = scratchcodeSlice
config.Active = true

14
models/multifactor.go
View file

@ -26,12 +26,24 @@ type MFAConfig struct {
ID int64 `bun:"id,pk,autoincrement"`
UserName string `bun:"username,notnull"`
TOTPSecret string `bun:"totpurl,notnull"`
RecoveryCodes []string `bun:"recoverycodes,notnull,array"`
ExpiresAt time.Time `bun:"expiresat,notnull"`
Active bool `bun:"active,notnull"`
}
type MFAScratchCode struct {
bun.BaseModel `bun:"table:multifactor_scratchcodes"`
Code string `bun:"code,pk"`
UserName string `bun:"username,notnull"`
IsUsed bool `bun:"is_used,notnull"`
}
type MFATemplateObject struct {
Key string
Image string
}
type MFASetupResponse struct {
Error bool `json:"error"`
Message string `json:"message,omitempty"`
RecoveryTokens []string `json:"recovery_tokens,omitempty"`
}

8
views/account.tmpl
View file

@ -50,11 +50,11 @@
<p>Created at: {{ .Created }}</p>
<h2>Security</h2>
{{if not .HasMFA}}
<a href="/admin/account/mfasetup" role="button">Setup 2fa</a>
{{else}}
{{if .MFAEnabled}}
<a role="button" class="secondary">2fa already enabled</a>
{{end}}
{{else}}
<a href="/admin/account/mfasetup" role="button">Setup 2fa</a>
{{end}}
<dialog id="dialog-info">
<h2 id="dialog-heading"></h2>
<p id="dialog-text"></p>

2
web/main.js
View file

@ -134,7 +134,7 @@ async function HandleMFASetupTokenSubmit() {
if (response.ok) {
let data = await response.json()
document.getElementById("dialog-tokens").textContent = data["recoverytokens"].join(" ")
document.getElementById("dialog-tokens").textContent = data["recovery_tokens"].join(" ")
document.getElementById('dialog-success').showModal()
} else {
document.cookie = 'gourlsh_mfa_setup=; Max-Age=-1; path=/; domain=' + location.hostname;