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Informations about the package jwt
JWT
A simple library to work with JSON Web Token and JSON Web Signature (requires PHP 5.6+). The implementation is based on the RFC 7519.
Installation
Package is available on Packagist, you can install it using Composer.
Dependencies
- PHP 5.6+
- OpenSSL Extension
Basic usage
Creating
Just use the builder to create a new JWT/JWS tokens:
Parsing from strings
Use the parser to create a new token from a JWT string (using the previous token as example):
Validating
We can easily validate if the token is valid (using the previous token and time as example):
Important
- You have to configure informing all claims you want to validate the token.
- If contains claims that are not being used in token or token has claims that are not configured in they will be ignored by .
- , and claims are configured by default in with the current UNIX time ().
- The optional parameter of will cause us to use that number of seconds of leeway when validating the time-based claims, pretending we are further in the future for the "Issued At" () and "Not Before" () claims and pretending we are further in the past for the "Expiration Time" () claim. This allows for situations where the clock of the issuing server has a different time than the clock of the verifying server, as mentioned in section 4.1 of RFC 7519.
Token signature
We can use signatures to be able to verify if the token was not modified after its generation. This library implements Hmac, RSA and ECDSA signatures (using 256, 384 and 512).
Important
Do not allow the string sent to the Parser to dictate which signature algorithm to use, or else your application will be vulnerable to a critical JWT security vulnerability.
The examples below are safe because the choice in Signer is hard-coded and
cannot be influenced by malicious users.
Hmac
Hmac signatures are really simple to be used:
RSA and ECDSA
RSA and ECDSA signatures are based on public and private keys so you have to generate using the private key and verify using the public key:
It's important to say that if you're using RSA keys you shouldn't invoke ECDSA signers (and vice-versa), otherwise and will raise an exception!
All versions of jwt with dependencies
ext-mbstring Version *
ext-openssl Version *