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<?php |
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namespace AtlassianConnectCore\Helpers; |
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/** |
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* Class JWTHelper |
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* |
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* @package AtlassianConnectCore\Helpers |
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*/ |
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class JWTHelper |
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{ |
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/** |
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* Decode JWT token |
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* |
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* @param string $token |
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* |
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* @return array|null |
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*/ |
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public static function decode($token) |
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{ |
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$parts = explode('.', $token); |
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if(count($parts) !== 3) { |
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return null; |
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} |
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return [ |
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'header' => json_decode(base64_decode($parts[0]), true), |
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'body' => json_decode(base64_decode($parts[1]), true), |
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'signature' => $parts[2] |
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]; |
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} |
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/** |
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* Create JWT token used by Atlassian REST API request |
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* |
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* @param string $url URL of the request |
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* @param string $method HTTP method |
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* @param string $addOnKey Key of the add-on |
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* @param string $secret Shared secret of the Tenant |
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* |
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* @return string |
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*/ |
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public static function create($url, $method, $addOnKey, $secret) |
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{ |
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$payload = [ |
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'iss' => $addOnKey, |
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'iat' => time(), |
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'exp' => time() + 86400, |
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'qsh' => static::qsh($url, $method) |
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]; |
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return \Firebase\JWT\JWT::encode($payload, $secret); |
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} |
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/** |
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* Create Query String Hash |
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* |
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* More details: |
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* https://developer.atlassian.com/static/connect/docs/latest/concepts/understanding-jwt.html#creating-token |
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* |
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* @param string $url URL of the request |
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* @param string $method HTTP method |
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* |
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* @return string |
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*/ |
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public static function qsh($url, $method) |
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{ |
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$method = strtoupper($method); |
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$parts = parse_url($url); |
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$path = $parts['path']; |
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$canonicalQuery = ''; |
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if (!empty($parts['query'])) { |
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$query = $parts['query']; |
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$queryParts = explode('&', $query); |
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$queryArray = []; |
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foreach ($queryParts as $queryPart) { |
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$pieces = explode('=', $queryPart); |
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$key = array_shift($pieces); |
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$key = rawurlencode($key); |
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$value = substr($queryPart, strlen($key) + 1); |
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$value = rawurlencode($value); |
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$queryArray[$key][] = $value; |
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} |
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ksort($queryArray); |
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foreach ($queryArray as $key => $pieceOfQuery) { |
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$pieceOfQuery = implode(',', $pieceOfQuery); |
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$canonicalQuery .= $key . '=' . $pieceOfQuery . '&'; |
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} |
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$canonicalQuery = rtrim($canonicalQuery, '&'); |
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} |
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$qshString = implode('&', [$method, $path, $canonicalQuery]); |
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$qsh = hash('sha256', $qshString); |
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return $qsh; |
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} |
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} |
brezzhnev /
atlassian-connect-core
