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