JSON WEB TOKEN 

Ivan Rosolen Graduado em Sistemas de Informação Pós-graduado em Gerência de Projetos Desenvolvedor a 15+ anos Autor 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= . eyJpc3MiOiAiaXZhbnJvc29sZW4uY29tIiwiZXhwIjogMTMwM DgxOTM4MCwibmFtZSI6ICJJdmFuIFJvc29sZW4iLCJhZG1pbiI 6IHRydWV9 . 

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= . eyJpc3MiOiAiaXZhbnJvc29sZW4uY29tIiwiZXhwIjogMTMwM DgxOTM4MCwibmFtZSI6ICJJdmFuIFJvc29sZW4iLCJhZG1pbiI 6IHRydWV9 . M2FjZTM0M2ZiNjhhMzBiOWNiYTkxN2U1Zjk4YjUxOWYzMT Y3NGZlMmU4MTIzYjU1NTRkMjNlNjYzOTkyZGU2Nw== 

Warning! 

Code 

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Github - Session - JWT - JOSE 

DEMO 

Refs 

Github https://github.com/ivanrosolen/crud-demo JWT https://github.com/dwyl/learn-json-web-tokens http://jwt.io https://developer.atlassian.com/static/connect/docs/latest/concepts/understanding-jwt.html http://stackoverflow.com/questions/20588467/how-to-do-stateless-session-less-cookie-less-authentication Talks http://www.slideshare.net/erickt86/secureapi http://www.slideshare.net/lcobucci/jwt-to-authentication-and-beyond Luís Otávio Cobucci Oblonczyk https://github.com/lcobucci/jwt https://github.com/Ocramius/PSR7Session 

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OBRIGADO! Visite phpsp.org.br