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refactor(authentication): use crypto constant time compare (#1800)

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* refactor(authentication): use crypto constant time compare

Improve security with usage of the crypto/subtle ConstantTimeCompare() method for hash comparison.

Fixes #1799

* docs: add explicit labels for chat types
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James Elliott 2021-03-11 12:08:49 +11:00 committed by GitHub
parent 5cf11f87c8
commit c310049faa
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2 changed files with 4 additions and 3 deletions
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4
README.md
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@ -12,8 +12,8 @@
[![AUR development version](https://img.shields.io/aur/version/authelia-git?logo=arch-linux&label=authelia-git&style=flat-square&color=blue)](https://aur.archlinux.org/packages/authelia-git/)
[![License](https://img.shields.io/github/license/authelia/authelia?logo=apache&style=flat-square&color=blue)][Apache 2.0]
[![Sponsor](https://img.shields.io/opencollective/all/authelia-sponsors?logo=Open%20Collective&label=financial%20contributors&style=flat-square&color=blue)](https://opencollective.com/authelia-sponsors)
[![Discord](https://img.shields.io/discord/707844280412012608?logo=discord&style=flat-square&color=blue)](https://discord.authelia.com)
[![Matrix](https://img.shields.io/matrix/authelia:matrix.org?logo=matrix&style=flat-square&color=blue)](https://riot.im/app/#/room/#authelia:matrix.org)
[![Discord](https://img.shields.io/discord/707844280412012608?label=discord&logo=discord&style=flat-square&color=blue)](https://discord.authelia.com)
[![Matrix](https://img.shields.io/matrix/authelia:matrix.org?label=matrix&logo=matrix&style=flat-square&color=blue)](https://riot.im/app/#/room/#authelia:matrix.org)
**Authelia** is an open-source authentication and authorization server
providing 2-factor authentication and single sign-on (SSO) for your

3
internal/authentication/password_hash.go
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@ -1,6 +1,7 @@
package authentication
import (
"crypto/subtle"
"errors"
"fmt"
"strconv"
@ -151,7 +152,7 @@ func CheckPassword(password, hash string) (ok bool, err error) {
return false, err
}
return passwordHash.Key == expectedHash.Key, nil
return subtle.ConstantTimeCompare([]byte(passwordHash.Key), []byte(expectedHash.Key)) == 1, nil
}
func getCryptSettings(salt string, algorithm CryptAlgo, iterations, memory, parallelism, keyLength int) (settings string) {