Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Stateless authentication w/ JSON Web Tokens
Search
DamirSvrtan
October 06, 2017
Programming
5
270
Stateless authentication w/ JSON Web Tokens
DamirSvrtan
October 06, 2017
Tweet
Share
More Decks by DamirSvrtan
See All by DamirSvrtan
Designing APIs: Less Data is More
damirsvrtan
1
430
Crossing Domain Boundaries with GraphQL
damirsvrtan
0
110
Surrounded by Microservices
damirsvrtan
2
5k
Building Serverless Ruby Bots @ Ruby Conf 2018
damirsvrtan
0
340
Building Serverless Ruby Bots @ Paris.rb Conf 2018
damirsvrtan
1
2k
Importing and serving millions of records
damirsvrtan
1
120
Building Ruby Bots on AWS Lambda
damirsvrtan
0
1k
Reinventing The Bootcamp Idea
damirsvrtan
0
150
JSON Web Tokens
damirsvrtan
0
180
Other Decks in Programming
See All in Programming
Architecture Decision Record (ADR)
nearme_tech
PRO
1
680
オートマトン学習しろ / Do automata learning
makenowjust
3
130
Regular Expressions, REXML, Automata Learning
makenowjust
0
220
rbs-inlineを導入してYARDからRBSに移行する
euglena1215
1
270
Amazon BedrockでサーバレスなAIお料理ボットを作成する!!
tosuri13
0
220
Method Swizzlingを行うライブラリにおけるマルチモジュール設計
yoshikma
0
120
状態管理ライブラリZustandの導入から運用まで
k1tikurisu
3
470
Understand the mechanism! Let's do screenshots tests of Compose Previews with various variations / 仕組みから理解する!Composeプレビューを様々なバリエーションでスクリーンショットテストしよう
sumio
3
610
Why Prism?
kddnewton
4
1.7k
XStateでReactに秩序を与えたい
gizm000
0
720
Ebitengineの1vs1ゲーム WebRTCの活用
ponyo877
0
370
The Sequel to a Dream of Ruby Parser's Grammar
ydah
1
220
Featured
See All Featured
Building Better People: How to give real-time feedback that sticks.
wjessup
359
18k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
663
120k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
25
3.9k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
278
13k
KATA
mclloyd
27
13k
Learning to Love Humans: Emotional Interface Design
aarron
270
40k
Testing 201, or: Great Expectations
jmmastey
36
7k
What the flash - Photography Introduction
edds
67
11k
Large-scale JavaScript Application Architecture
addyosmani
508
110k
Infographics Made Easy
chrislema
239
18k
For a Future-Friendly Web
brad_frost
174
9.3k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
45
4.8k
Transcript
Authentication with JSON Web Tokens
01 API AUTHENTICATION
CLIENT SERVER
[email protected]
&PASSWORD=PASS123 AUTH_TOKEN=RAND0M$TR1N6
CLIENT SERVER ARTICLES?AUTH_TOKEN=RAND0M$TR1N6
02 SINGLE AUTH TOKEN PER USER
id email password_digest auth_token 1
[email protected]
$2a$10$5FkD.. 23ZS921a USERS TABLE
GENERATE A RANDOM AUTH TOKEN class User before_save :generate_auth_token def
generate_auth_token loop do self.auth_token = Devise.friendly_token break if User.find_by_auth_token(auth_token).nil? end end end
PROBLEMS WITH THE SINGLE AUTH TOKEN APPROACH
NAIVE IMPLEMENTATIONS NEVER EXPIRE THEM
STORING IT IN PLAIN TEXT
ISN’T THAT THE SAME AS STORING PASSWORDS IN PLAIN TEXT?
NOT QUITE
• difficult to change • used across several services PASSWORDS
• easy to change • auto-generated, random, unique • not
used across several services AUTH TOKENS
03 SINGLE HASHED AUTH TOKEN PER USER
NOT STORING IT IN PLAIN TEXT
BROWSER SERVER EM AIL=DAM IR@ EXAM PLE.COM &PASSW ORD=PASS123 AUTH_TOKEN=RAND0M
$TR1N6 EM AIL=DAM IR@ EXAM PLE.COM &PASSW ORD=PASS123 MOBILE AUTH_TOKEN=ANOTHER-RAND0M $TR1N6
04 MULTIPLE HASHED AUTH TOKENS PER USER
user_id token_digest 1 $2a$10$5FkD.. 2 $3R$D9S21$.. 1 $23$2sBPSA.. AUTH TOKENS
TABLE
ERASE TOKENS PERIODICALLY
0Rel STORE TOKENS NOWHERE WHAT IF WE DIDN’T STORE THEM
ANYWHERE?
LET’S DO SOMETHING SIMILAR TO RAILS SESSIONS!
05 RAILS SESSION STORAGE
CLIENT SERVER
[email protected]
&PASSWORD=PASS123 SET-COOKIE: APP_SESSION=23OFSKL932RDASDAFSFJ23
session[:user_id] = current_user.id
sign(encrypt(hash))
CLIENT SERVER APP_SESSION=23OFSKL932RDASDAFSFJ23
decrypt(verify_signature(cookie))
User.find(session[:user_id])
WE COULD DO SOMETHING SIMILAR… … OR FOLLOW AN OPEN
STANDARD
06 JSON WEB TOKENS
JSON Web Tokens are an open standard that defines a
compact and self-contained way to securely share information between parties as a JSON Object.
CLIENT SERVER
[email protected]
&PASSWORD=PASS123 AUTH_TOKEN=33WE.DAS3Q.ADAS
TO THE API CONSUMER IT CAN LOOK RANDOM..
..BUT IT’S MUCH MORE
IT STORES INFORMATION INSIDE OF IT.
DATA + SIGNATURE
DATA + SIGNATURE data = { "user_id": 231 } token
= data + sign(data)
ABASASD.U93RJADSF.ASASD
ABASASD.U93RJADSF.ASASD HEADER.PAYLOAD.SIGNATURE
THE JWT HEADER
{ "typ": "JWT", "alg": "HS256" } HEADER
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9 BASE64 ENCODED HEADER
THE JWT BODY
{ “user_id": 231, "exp": 1300819380, } BODY
eyJpc3MiOiJzY290Y2guaW8iLCJleHAiOjE BASE64 ENCODED BODY
THE JWT SIGNATURE
encoded_string = Base64.encode64(header) + "." + Base64.encode64(payload); OpenSSL::HMAC.hexdigest( OpenSSL::Digest.new(‘sha256'), Rails.application.secrets.secret_key_base,
encoded_string ) GENERATE A SIGNATURE
SIGNATURE 03f329983b86f7d9a9f5fef85305880101d
JSON WEB TOKEN eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.e yJpc3MiOiJzY290Y2guaW8iLCJleHAiOjE. 03f329983b86f7d9a9f5fef85305880101d
iss: The issuer of the token sub: The subject of
the token exp: This will define the expiration in NumericDate value. nbf: Defines the time before which the JWT MUST NOT be accepted for processing iat: The time the JWT was issued. Can be used to determine the age of the JWT BODY CLAIMS
08 JWT <> RAILS SESSIONS
RAILS SESSIONS ARE ENCRYPTED JWT’S ARE SIGNED
RAILS SESSIONS CAN’T BE READ ON THE CLIENT SIDE JWT’S
CAN BE READ ON THE CLIENT SIDE
SECRET INFORMATION IN JWT’S MUST BE EXPLICITLY ENCRYPTED
09 STATELESS AUTH
{ “user_id": 231 } BODY
FORCE LOGOUT / ACCOUNT HIJACKING
10 REVOCATION
HOW DOES DEVISE HANDLE THIS?
INSERT A PART OF THE USERS PASSWORD HASH INTO THE
PAYLOAD
SESSION['WARDEN.USER.KEY'] [[1], "$2A$11$NNJPSD1Q36CG.PSQKPBU/U"]
{ "exp": 1300819380, “user_id": 1, “pwd_start": $2a$11$nnjPSD1q36Cg.PSqKPBU }
DISABLE TOKENS WITH AN IAT CLAIM OLDER THAN 6.10.2017
{ “user_id": 231, "exp": 1300819380, "iat": 1300700011, } BODY
id email password min_issued_at 1
[email protected]
$2a$10$5FkD.. 2017-09-09 08:59:06.750087
JTI JSON TOKEN IDENTIFIER
{ "exp": 1300819380, "jti": 0A212BXC12, } BODY
id email password jti 1
[email protected]
$2a$10$5FkD.. DSAY039R21S
LOGOUTS DON’T INVALIDATE TOKENS
10 JWT ADVANTAGES
SAFELY SHARE DATA WITH THE CLIENT APP
{ “user_id": 231, "admin": true, “permissions”: [‘read’, ‘write’] }
SELF CONTAINED TIME-BASED EXPIRATION HANDLING
SCALABILITY
MICROSERVICES INFORMATION SHARING
NOT REINVENTING THE WHEEL - USING AN OPEN STANDARD.
LANGUAGE SUPPORT
JWT.IO RUBY, ELIXIR, GO, PYTHON, JAVA, RUST..
11 RAILS IMPLEMENTATIONS
None
None
None
CONCLUSIONS
SCALABILITY. SIMPLICITY. STANDARDIZATION.
ALWAYS IMPLEMENT A REVOCATION TECHNIQUE
NO SILVER BULLET.
None
Damir Svrtan Rails Team Lead @ infinum.co Organizer @ Ruby
Zagreb Hit me up on twitter @DamirSvrtan