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<?php |
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3
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function generate_jwt($headers, $payload) { |
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$headers_encoded = base64url_encode(json_encode($headers)); |
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$payload_encoded = base64url_encode(json_encode($payload)); |
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8
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$signature = hash_hmac('SHA256', "$headers_encoded.$payload_encoded", DB_PASSWD, true); |
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$signature_encoded = base64url_encode($signature); |
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$jwt = "$headers_encoded.$payload_encoded.$signature_encoded"; |
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return $jwt; |
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} |
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function is_jwt_valid($jwt) { |
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// split the jwt |
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$tokenParts = explode('.', $jwt); |
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$header = base64_decode($tokenParts[0]); |
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$payload = base64_decode($tokenParts[1]); |
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$signature_provided = $tokenParts[2]; |
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// check the expiration time - note this will cause an error if there is no 'exp' claim in the jwt |
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$expiration = json_decode($payload)->exp; |
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$is_token_expired = ($expiration - time()) < 0; |
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// build a signature based on the header and payload using the secret |
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$base64_url_header = base64url_encode($header); |
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$base64_url_payload = base64url_encode($payload); |
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$signature = hash_hmac('SHA256', $base64_url_header . "." . $base64_url_payload, DB_PASSWD, true); |
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$base64_url_signature = base64url_encode($signature); |
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// verify it matches the signature provided in the jwt |
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$is_signature_valid = ($base64_url_signature === $signature_provided); |
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if ($is_token_expired || !$is_signature_valid) { |
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return FALSE; |
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} else { |
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return TRUE; |
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} |
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} |
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function base64url_encode($data) { |
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return rtrim(strtr(base64_encode($data), '+/', '-_'), '='); |
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} |
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47
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function get_authorization_header(){ |
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$headers = null; |
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49
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50
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if (isset($_SERVER['Authorization'])) { |
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$headers = trim($_SERVER["Authorization"]); |
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} else if (isset($_SERVER['HTTP_AUTHORIZATION'])) { //Nginx or fast CGI |
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$headers = trim($_SERVER["HTTP_AUTHORIZATION"]); |
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} else if (function_exists('apache_request_headers')) { |
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$requestHeaders = apache_request_headers(); |
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// Server-side fix for bug in old Android versions (a nice side-effect of this fix means we don't care about capitalization for Authorization) |
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$requestHeaders = array_combine(array_map('ucwords', array_keys($requestHeaders)), array_values($requestHeaders)); |
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//print_r($requestHeaders); |
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if (isset($requestHeaders['Authorization'])) { |
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$headers = trim($requestHeaders['Authorization']); |
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} |
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} |
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64
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return $headers; |
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65
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} |
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66
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67
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function get_bearer_token() { |
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$headers = get_authorization_header(); |
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69
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70
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// HEADER: Get the access token from the header |
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if (!empty($headers)) { |
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if (preg_match('/Bearer\s(\S+)/', $headers, $matches)) { |
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return $matches[1]; |
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} |
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} |
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return null; |
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} |
nilsteampassnet /
TeamPass
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