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[Refactor] Passwort Hash/Set (#14282)

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* move SaltGeneration into HashPasswort and rename it to what it does

* Migration: Where Password is Valid with Empty String delete it

* prohibit empty password hash

* let SetPassword("") unset pwd stuff
This commit is contained in:
6543 2021-01-10 19:05:18 +01:00 committed by GitHub
parent 6b3b6f1833
commit 74a0481586
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 158 additions and 32 deletions
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5
cmd/admin.go
View file

@ -349,12 +349,11 @@ func runChangePassword(c *cli.Context) error {
if err != nil {
return err
}
if user.Salt, err = models.GetUserSalt(); err != nil {
if err = user.SetPassword(c.String("password")); err != nil {
return err
}
user.HashPassword(c.String("password"))
if err := models.UpdateUserCols(user, "passwd", "passwd_hash_algo", "salt"); err != nil {
if err = models.UpdateUserCols(user, "passwd", "passwd_hash_algo", "salt"); err != nil {
return err
}

6
models/login_source.go
View file

@ -771,8 +771,10 @@ func UserSignIn(username, password string) (*User, error) {
// Update password hash if server password hash algorithm have changed
if user.PasswdHashAlgo != setting.PasswordHashAlgo {
user.HashPassword(password)
if err := UpdateUserCols(user, "passwd", "passwd_hash_algo"); err != nil {
if err = user.SetPassword(password); err != nil {
return nil, err
}
if err = UpdateUserCols(user, "passwd", "passwd_hash_algo", "salt"); err != nil {
return nil, err
}
}

2
models/migrations/migrations.go
View file

@ -277,6 +277,8 @@ var migrations = []Migration{
NewMigration("Add scope and nonce columns to oauth2_grant table", addScopeAndNonceColumnsToOAuth2Grant),
// v165 -> v166
NewMigration("Convert hook task type from char(16) to varchar(16) and trim the column", convertHookTaskTypeToVarcharAndTrim),
// v166 -> v167
NewMigration("Where Password is Valid with Empty String delete it", recalculateUserEmptyPWD),
}
// GetCurrentDBVersion returns the current db version

115
models/migrations/v166.go Normal file
View file

@ -0,0 +1,115 @@
// Copyright 2021 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 migrations
import (
"crypto/sha256"
"fmt"
"golang.org/x/crypto/argon2"
"golang.org/x/crypto/bcrypt"
"golang.org/x/crypto/pbkdf2"
"golang.org/x/crypto/scrypt"
"xorm.io/builder"
"xorm.io/xorm"
)
func recalculateUserEmptyPWD(x *xorm.Engine) (err error) {
const (
algoBcrypt = "bcrypt"
algoScrypt = "scrypt"
algoArgon2 = "argon2"
algoPbkdf2 = "pbkdf2"
)
type User struct {
ID int64 `xorm:"pk autoincr"`
Passwd string `xorm:"NOT NULL"`
PasswdHashAlgo string `xorm:"NOT NULL DEFAULT 'argon2'"`
MustChangePassword bool `xorm:"NOT NULL DEFAULT false"`
LoginType int
LoginName string
Type int
Salt string `xorm:"VARCHAR(10)"`
}
// hashPassword hash password based on algo and salt
// state 461406070c
hashPassword := func(passwd, salt, algo string) string {
var tempPasswd []byte
switch algo {
case algoBcrypt:
tempPasswd, _ = bcrypt.GenerateFromPassword([]byte(passwd), bcrypt.DefaultCost)
return string(tempPasswd)
case algoScrypt:
tempPasswd, _ = scrypt.Key([]byte(passwd), []byte(salt), 65536, 16, 2, 50)
case algoArgon2:
tempPasswd = argon2.IDKey([]byte(passwd), []byte(salt), 2, 65536, 8, 50)
case algoPbkdf2:
fallthrough
default:
tempPasswd = pbkdf2.Key([]byte(passwd), []byte(salt), 10000, 50, sha256.New)
}
return fmt.Sprintf("%x", tempPasswd)
}
// ValidatePassword checks if given password matches the one belongs to the user.
// state 461406070c, changed since it's not necessary to be time constant
ValidatePassword := func(u *User, passwd string) bool {
tempHash := hashPassword(passwd, u.Salt, u.PasswdHashAlgo)
if u.PasswdHashAlgo != algoBcrypt && u.Passwd == tempHash {
return true
}
if u.PasswdHashAlgo == algoBcrypt && bcrypt.CompareHashAndPassword([]byte(u.Passwd), []byte(passwd)) == nil {
return true
}
return false
}
sess := x.NewSession()
defer sess.Close()
const batchSize = 100
for start := 0; ; start += batchSize {
users := make([]*User, 0, batchSize)
if err = sess.Limit(batchSize, start).Where(builder.Neq{"passwd": ""}, 0).Find(&users); err != nil {
return
}
if len(users) == 0 {
break
}
if err = sess.Begin(); err != nil {
return
}
for _, user := range users {
if ValidatePassword(user, "") {
user.Passwd = ""
user.Salt = ""
user.PasswdHashAlgo = ""
if _, err = sess.ID(user.ID).Cols("passwd", "salt", "passwd_hash_algo").Update(user); err != nil {
return err
}
}
}
if err = sess.Commit(); err != nil {
return
}
}
// delete salt and algo where password is empty
if _, err = sess.Where(builder.Eq{"passwd": ""}.And(builder.Neq{"salt": ""}.Or(builder.Neq{"passwd_hash_algo": ""}))).
Cols("salt", "passwd_hash_algo").Update(&User{}); err != nil {
return err
}
return sess.Commit()
}

22
models/user.go
View file

@ -395,10 +395,23 @@ func hashPassword(passwd, salt, algo string) string {
return fmt.Sprintf("%x", tempPasswd)
}
// HashPassword hashes a password using the algorithm defined in the config value of PASSWORD_HASH_ALGO.
func (u *User) HashPassword(passwd string) {
// SetPassword hashes a password using the algorithm defined in the config value of PASSWORD_HASH_ALGO
// change passwd, salt and passwd_hash_algo fields
func (u *User) SetPassword(passwd string) (err error) {
if len(passwd) == 0 {
u.Passwd = ""
u.Salt = ""
u.PasswdHashAlgo = ""
return nil
}
if u.Salt, err = GetUserSalt(); err != nil {
return err
}
u.PasswdHashAlgo = setting.PasswordHashAlgo
u.Passwd = hashPassword(passwd, u.Salt, setting.PasswordHashAlgo)
return nil
}
// ValidatePassword checks if given password matches the one belongs to the user.
@ -416,7 +429,7 @@ func (u *User) ValidatePassword(passwd string) bool {
// IsPasswordSet checks if the password is set or left empty
func (u *User) IsPasswordSet() bool {
return !u.ValidatePassword("")
return len(u.Passwd) != 0
}
// IsOrganization returns true if user is actually a organization.
@ -826,10 +839,9 @@ func CreateUser(u *User) (err error) {
if u.Rands, err = GetUserSalt(); err != nil {
return err
}
if u.Salt, err = GetUserSalt(); err != nil {
if err = u.SetPassword(u.Passwd); err != nil {
return err
}
u.HashPassword(u.Passwd)
u.AllowCreateOrganization = setting.Service.DefaultAllowCreateOrganization && !setting.Admin.DisableRegularOrgCreation
u.EmailNotificationsPreference = setting.Admin.DefaultEmailNotification
u.MaxRepoCreation = -1

19
models/user_test.go
View file

@ -220,8 +220,7 @@ func TestEmailNotificationPreferences(t *testing.T) {
func TestHashPasswordDeterministic(t *testing.T) {
b := make([]byte, 16)
rand.Read(b)
u := &User{Salt: string(b)}
u := &User{}
algos := []string{"argon2", "pbkdf2", "scrypt", "bcrypt"}
for j := 0; j < len(algos); j++ {
u.PasswdHashAlgo = algos[j]
@ -231,19 +230,15 @@ func TestHashPasswordDeterministic(t *testing.T) {
pass := string(b)
// save the current password in the user - hash it and store the result
u.HashPassword(pass)
u.SetPassword(pass)
r1 := u.Passwd
// run again
u.HashPassword(pass)
u.SetPassword(pass)
r2 := u.Passwd
// assert equal (given the same salt+pass, the same result is produced) except bcrypt
if u.PasswdHashAlgo == "bcrypt" {
assert.NotEqual(t, r1, r2)
} else {
assert.Equal(t, r1, r2)
}
assert.True(t, u.ValidatePassword(pass))
}
}
}
@ -252,12 +247,10 @@ func BenchmarkHashPassword(b *testing.B) {
// BenchmarkHashPassword ensures that it takes a reasonable amount of time
// to hash a password - in order to protect from brute-force attacks.
pass := "password1337"
bs := make([]byte, 16)
rand.Read(bs)
u := &User{Salt: string(bs), Passwd: pass}
u := &User{Passwd: pass}
b.ResetTimer()
for i := 0; i < b.N; i++ {
u.HashPassword(pass)
u.SetPassword(pass)
}
}

5
routers/admin/users.go
View file

@ -267,7 +267,10 @@ func EditUserPost(ctx *context.Context, form auth.AdminEditUserForm) {
ctx.ServerError("UpdateUser", err)
return
}
u.HashPassword(form.Password)
if err = u.SetPassword(form.Password); err != nil {
ctx.InternalServerError(err)
return
}
}
if len(form.UserName) != 0 && u.Name != form.UserName {

5
routers/api/v1/admin/user.go
View file

@ -174,7 +174,10 @@ func EditUser(ctx *context.APIContext, form api.EditUserOption) {
ctx.Error(http.StatusInternalServerError, "UpdateUser", err)
return
}
u.HashPassword(form.Password)
if err = u.SetPassword(form.Password); err != nil {
ctx.InternalServerError(err)
return
}
}
if form.MustChangePassword != nil {

6
routers/user/auth.go
View file

@ -1517,11 +1517,10 @@ func ResetPasswdPost(ctx *context.Context) {
ctx.ServerError("UpdateUser", err)
return
}
if u.Salt, err = models.GetUserSalt(); err != nil {
if err = u.SetPassword(passwd); err != nil {
ctx.ServerError("UpdateUser", err)
return
}
u.HashPassword(passwd)
u.MustChangePassword = false
if err := models.UpdateUserCols(u, "must_change_password", "passwd", "passwd_hash_algo", "rands", "salt"); err != nil {
ctx.ServerError("UpdateUser", err)
@ -1591,12 +1590,11 @@ func MustChangePasswordPost(ctx *context.Context, cpt *captcha.Captcha, form aut
}
var err error
if u.Salt, err = models.GetUserSalt(); err != nil {
if err = u.SetPassword(form.Password); err != nil {
ctx.ServerError("UpdateUser", err)
return
}
u.HashPassword(form.Password)
u.MustChangePassword = false
if err := models.UpdateUserCols(u, "must_change_password", "passwd", "passwd_hash_algo", "salt"); err != nil {

3
routers/user/setting/account.go
View file

@ -63,11 +63,10 @@ func AccountPost(ctx *context.Context, form auth.ChangePasswordForm) {
ctx.Flash.Error(errMsg)
} else {
var err error
if ctx.User.Salt, err = models.GetUserSalt(); err != nil {
if err = ctx.User.SetPassword(form.Password); err != nil {
ctx.ServerError("UpdateUser", err)
return
}
ctx.User.HashPassword(form.Password)
if err := models.UpdateUserCols(ctx.User, "salt", "passwd_hash_algo", "passwd"); err != nil {
ctx.ServerError("UpdateUser", err)
return