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PHP-JWT

A simple library to encode and decode JSON Web Tokens (JWT) in PHP, conforming to RFC 7519.

Installation

Use composer to manage your dependencies and download PHP-JWT:

composer require firebase/php-jwt

Example

<?php
use \Firebase\JWT\JWT;

$key = "example_key";
$token = array(
    "iss" => "http://example.org",
    "aud" => "http://example.com",
    "iat" => 1356999524,
    "nbf" => 1357000000
);

/**
 * IMPORTANT:
 * You must specify supported algorithms for your application. See
 * https://tools.ietf.org/html/draft-ietf-jose-json-web-algorithms-40
 * for a list of spec-compliant algorithms.
 */
$jwt = JWT::encode($token, $key);
$decoded = JWT::decode($jwt, $key, array('HS256'));

print_r($decoded);

/*
 NOTE: This will now be an object instead of an associative array. To get
 an associative array, you will need to cast it as such:
*/

$decoded_array = (array) $decoded;

/**
 * You can add a leeway to account for when there is a clock skew times between
 * the signing and verifying servers. It is recommended that this leeway should
 * not be bigger than a few minutes.
 *
 * Source: http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#nbfDef
 */
JWT::$leeway = 60; // $leeway in seconds
$decoded = JWT::decode($jwt, $key, array('HS256'));

?>

Example with RS256 (openssl)

<?php
use \Firebase\JWT\JWT;

$privateKey = <<<EOD
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
EOD;

$publicKey = <<<EOD
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8kGa1pSjbSYZVebtTRBLxBz5H
4i2p/llLCrEeQhta5kaQu/RnvuER4W8oDH3+3iuIYW4VQAzyqFpwuzjkDI+17t5t
0tyazyZ8JXw+KgXTxldMPEL95+qVhgXvwtihXC1c5oGbRlEDvDF6Sa53rcFVsYJ4
ehde/zUxo6UvS7UrBQIDAQAB
-----END PUBLIC KEY-----
EOD;

$token = array(
    "iss" => "example.org",
    "aud" => "example.com",
    "iat" => 1356999524,
    "nbf" => 1357000000
);

$jwt = JWT::encode($token, $privateKey, 'RS256');
echo "Encode:\n" . print_r($jwt, true) . "\n";

$decoded = JWT::decode($jwt, $publicKey, array('RS256'));

/*
 NOTE: This will now be an object instead of an associative array. To get
 an associative array, you will need to cast it as such:
*/

$decoded_array = (array) $decoded;
echo "Decode:\n" . print_r($decoded_array, true) . "\n";
?>

Changelog

5.0.0 / 2017-06-26

Support RS384 and RS512. See #117. Thanks @joostfaassen!
Add an example for RS256 openssl. See #125. Thanks @akeeman!
Detect invalid Base64 encoding in signature. See #162. Thanks @psignoret!
Update JWT::verify to handle OpenSSL errors. See #159. Thanks @bshaffer!
Add array type hinting to decode method See #101. Thanks @hywak!
Add all JSON error types. See #110. Thanks @gbalduzzi!
Bugfix 'kid' not in given key list. See #129. Thanks @stampycode!
Miscellaneous cleanup, documentation and test fixes. See #107, #115, #160, #161, and #165. Thanks @akeeman, @chinedufn, and @bshaffer!

4.0.0 / 2016-07-17

Add support for late static binding. See #88 for details. Thanks to @chappy84!
Use static $timestamp instead of time() to improve unit testing. See #93 for details. Thanks to @josephmcdermott!
Fixes to exceptions classes. See #81 for details. Thanks to @Maks3w!
Fixes to PHPDoc. See #76 for details. Thanks to @akeeman!

3.0.0 / 2015-07-22

Minimum PHP version updated from 5.2.0 to 5.3.0.
Add \Firebase\JWT namespace. See #59 for details. Thanks to @Dashron!
Require a non-empty key to decode and verify a JWT. See #60 for details. Thanks to @sjones608!
Cleaner documentation blocks in the code. See #62 for details. Thanks to @johanderuijter!

2.2.0 / 2015-06-22

Add support for adding custom, optional JWT headers to JWT::encode(). See #53 for details. Thanks to @mcocaro!

2.1.0 / 2015-05-20

Add support for adding a leeway to JWT:decode() that accounts for clock skew between signing and verifying entities. Thanks to @lcabral!
Add support for passing an object implementing the ArrayAccess interface for $keys argument in JWT::decode(). Thanks to @aztech-dev!

2.0.0 / 2015-04-01

Note: It is strongly recommended that you update to > v2.0.0 to address known security vulnerabilities in prior versions when both symmetric and asymmetric keys are used together.
Update signature for JWT::decode(...) to require an array of supported algorithms to use when verifying token signatures.

Tests

Run the tests using phpunit:

$ pear install PHPUnit
$ phpunit --configuration phpunit.xml.dist
PHPUnit 3.7.10 by Sebastian Bergmann.
.....
Time: 0 seconds, Memory: 2.50Mb
OK (5 tests, 5 assertions)

New Lines in private keys

If your private key contains \n characters, be sure to wrap it in double quotes "" and not single quotes '' in order to properly interpret the escaped characters.

License

3-Clause BSD.

README.md