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author | zotlabs <mike@macgirvin.com> | 2017-03-20 11:05:46 +1100 |
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committer | GitHub <noreply@github.com> | 2017-03-20 11:05:46 +1100 |
commit | 1bdab6e633fd023432ed86ad898da1fe4ddc470f (patch) | |
tree | a1be386a1078a89909741da89790db7be9a30baa /vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php | |
parent | 1bf2a9d47b9b72fae36ef5b35c1444a159c82adb (diff) | |
parent | 8b4b1350369714a832588c74df3f261b538ec566 (diff) | |
download | volse-hubzilla-1bdab6e633fd023432ed86ad898da1fe4ddc470f.tar.gz volse-hubzilla-1bdab6e633fd023432ed86ad898da1fe4ddc470f.tar.bz2 volse-hubzilla-1bdab6e633fd023432ed86ad898da1fe4ddc470f.zip |
Merge pull request #703 from dawnbreak/oauth2
:arrow_up: Update bshaffer/oauth2-server-php library.
Diffstat (limited to 'vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php')
-rw-r--r-- | vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php new file mode 100644 index 000000000..ee576e643 --- /dev/null +++ b/vendor/bshaffer/oauth2-server-php/src/OAuth2/Encryption/Jwt.php @@ -0,0 +1,173 @@ +<?php + +namespace OAuth2\Encryption; + +/** + * @link https://github.com/F21/jwt + * @author F21 + */ +class Jwt implements EncryptionInterface +{ + public function encode($payload, $key, $algo = 'HS256') + { + $header = $this->generateJwtHeader($payload, $algo); + + $segments = array( + $this->urlSafeB64Encode(json_encode($header)), + $this->urlSafeB64Encode(json_encode($payload)) + ); + + $signing_input = implode('.', $segments); + + $signature = $this->sign($signing_input, $key, $algo); + $segments[] = $this->urlsafeB64Encode($signature); + + return implode('.', $segments); + } + + public function decode($jwt, $key = null, $allowedAlgorithms = true) + { + if (!strpos($jwt, '.')) { + return false; + } + + $tks = explode('.', $jwt); + + if (count($tks) != 3) { + return false; + } + + list($headb64, $payloadb64, $cryptob64) = $tks; + + if (null === ($header = json_decode($this->urlSafeB64Decode($headb64), true))) { + return false; + } + + if (null === $payload = json_decode($this->urlSafeB64Decode($payloadb64), true)) { + return false; + } + + $sig = $this->urlSafeB64Decode($cryptob64); + + if ((bool) $allowedAlgorithms) { + if (!isset($header['alg'])) { + return false; + } + + // check if bool arg supplied here to maintain BC + if (is_array($allowedAlgorithms) && !in_array($header['alg'], $allowedAlgorithms)) { + return false; + } + + if (!$this->verifySignature($sig, "$headb64.$payloadb64", $key, $header['alg'])) { + return false; + } + } + + return $payload; + } + + private function verifySignature($signature, $input, $key, $algo = 'HS256') + { + // use constants when possible, for HipHop support + switch ($algo) { + case'HS256': + case'HS384': + case'HS512': + return $this->hash_equals( + $this->sign($input, $key, $algo), + $signature + ); + + case 'RS256': + return openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA256') ? OPENSSL_ALGO_SHA256 : 'sha256') === 1; + + case 'RS384': + return @openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'sha384') === 1; + + case 'RS512': + return @openssl_verify($input, $signature, $key, defined('OPENSSL_ALGO_SHA512') ? OPENSSL_ALGO_SHA512 : 'sha512') === 1; + + default: + throw new \InvalidArgumentException("Unsupported or invalid signing algorithm."); + } + } + + private function sign($input, $key, $algo = 'HS256') + { + switch ($algo) { + case 'HS256': + return hash_hmac('sha256', $input, $key, true); + + case 'HS384': + return hash_hmac('sha384', $input, $key, true); + + case 'HS512': + return hash_hmac('sha512', $input, $key, true); + + case 'RS256': + return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA256') ? OPENSSL_ALGO_SHA256 : 'sha256'); + + case 'RS384': + return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'sha384'); + + case 'RS512': + return $this->generateRSASignature($input, $key, defined('OPENSSL_ALGO_SHA512') ? OPENSSL_ALGO_SHA512 : 'sha512'); + + default: + throw new \Exception("Unsupported or invalid signing algorithm."); + } + } + + private function generateRSASignature($input, $key, $algo) + { + if (!openssl_sign($input, $signature, $key, $algo)) { + throw new \Exception("Unable to sign data."); + } + + return $signature; + } + + public function urlSafeB64Encode($data) + { + $b64 = base64_encode($data); + $b64 = str_replace(array('+', '/', "\r", "\n", '='), + array('-', '_'), + $b64); + + return $b64; + } + + public function urlSafeB64Decode($b64) + { + $b64 = str_replace(array('-', '_'), + array('+', '/'), + $b64); + + return base64_decode($b64); + } + + /** + * Override to create a custom header + */ + protected function generateJwtHeader($payload, $algorithm) + { + return array( + 'typ' => 'JWT', + 'alg' => $algorithm, + ); + } + + protected function hash_equals($a, $b) + { + if (function_exists('hash_equals')) { + return hash_equals($a, $b); + } + $diff = strlen($a) ^ strlen($b); + for ($i = 0; $i < strlen($a) && $i < strlen($b); $i++) { + $diff |= ord($a[$i]) ^ ord($b[$i]); + } + + return $diff === 0; + } +} |