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JSON WEB TOKEN
Ivan RosolenGraduado em Sistemas de InformaçãoPós-graduado em Gerência de Projetos
Desenvolvedor a 15+ anosAutor de vários PHPT (testes para o PHP)
Entusiasta de novas tecnologias
Head of Innovation @ Arizona
CTO @ Mokation
@ivanrosolen
Authentication
- Form Request Post/Get
- OAuth
- Key/Hash
- Credenciais em plain text
- Session Cookies
- Data is stored in plain text on the server
- Filesystem read/write requests
- Distributed/clustered applications
- Redis/Sticky sessions
API
- Stateless authentication (simplifies horizontal scaling)
- Prevent (mitigate) Cross-Site Request Forgery (CSRF)
attacks.
- Security (https)
- Authorization: Bearer
- Authentication vs. Authorization
- 401 unauthorized / 403 forbidden
- JWT != ACL
JOSE
- JWT
- JWS
- JWA
- JWK
- JWE
JSON Object Signing and Encryption
Advantages
- JSON Web Tokens work across different programming languages
- JWTs are self-contained
- JWTs can be passed around easily and secure
- Better control like “one time token” to forgot password, confirm
user, request rates, access, etc.
- One token to rule them all (Stateless)
Anatomy
header.claims.signature
Header
{
"typ": "JWT",
"alg": "HS256"
}
Claims- iss: The issuer of the token
- sub: The subject of the token
- aud: The audience of the token
- exp: This will probably be the registered claim most often used. This will define the expiration
in NumericDate value. The expiration MUST be after the current date/time.
- 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
- jti: Unique identifier for the JWT. Can be used to prevent the JWT from being replayed. This is
helpful for a one time use token.
http://www.slideshare.net/lcobucci/jwt-to-authentication-and-beyond
Payload / Claims{
"iss": "ivanrosolen.com",
"exp": 1300819380,
"name": "Ivan Rosolen",
"admin": true
}
JWT
eyJ0eXAiOiAiSldUIiwiYWxnIjogIkhTMjU2In0=.eyJpc3MiOiAiaXZhbnJvc29sZW4uY29tIiwiZXhwIjogMTMwMDgxOTM4MCwibmFtZSI6ICJJdmFuIFJvc29sZW4iLCJhZG1pbiI6IHRydWV9.
JWS
- header
- claims
payload
base64(header) . base64(claims)
JWA
- secret (hmac sha256, rsa256 ....)
- encrypt payload with key ‘Xuplau’
Signature
var encodedString = base64UrlEncode(header) + "."
+ base64UrlEncode(payload);
HMACSHA256(encodedString, 'Xuplau');
JWT
eyJ0eXAiOiAiSldUIiwiYWxnIjogIkhTMjU2In0=.eyJpc3MiOiAiaXZhbnJvc29sZW4uY29tIiwiZXhwIjogMTMwMDgxOTM4MCwibmFtZSI6ICJJdmFuIFJvc29sZW4iLCJhZG1pbiI6IHRydWV9.M2FjZTM0M2ZiNjhhMzBiOWNiYTkxN2U1Zjk4YjUxOWYzMTY3NGZlMmU4MTIzYjU1NTRkMjNlNjYzOTkyZGU2Nw==
Warning!
Code
Github
- Session
- JWT
- JOSE
DEMO
Refs
Githubhttps://github.com/ivanrosolen/crud-demo
JWThttps://github.com/dwyl/learn-json-web-tokenshttp://jwt.iohttps://developer.atlassian.com/static/connect/docs/latest/concepts/understanding-jwt.htmlhttp://stackoverflow.com/questions/20588467/how-to-do-stateless-session-less-cookie-less-authentication
Talkshttp://www.slideshare.net/erickt86/secureapihttp://www.slideshare.net/lcobucci/jwt-to-authentication-and-beyond
Luís Otávio Cobucci Oblonczykhttps://github.com/lcobucci/jwthttps://github.com/Ocramius/PSR7Session
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OBRIGADO!
Visite phpsp.org.br