Merge commit 'fa89acd'

# Conflicts:
#	.gitignore
#	extensions/ArchInterWiki.sql

1 files changed, 334 insertions, 0 deletions

diff --git a/vendor/firebase/php-jwt/Authentication/JWT.php b/vendor/firebase/php-jwt/Authentication/JWT.php
new file mode 100644
index 00000000..7d6665bd
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+++ b/vendor/firebase/php-jwt/Authentication/JWT.php
@@ -0,0 +1,334 @@
+<?php
+
+/**
+ * JSON Web Token implementation, based on this spec:
+ * http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-06
+ *
+ * PHP version 5
+ *
+ * @category Authentication
+ * @package  Authentication_JWT
+ * @author   Neuman Vong <neuman@twilio.com>
+ * @author   Anant Narayanan <anant@php.net>
+ * @license  http://opensource.org/licenses/BSD-3-Clause 3-clause BSD
+ * @link     https://github.com/firebase/php-jwt
+ */
+class JWT
+{
+
+    /**
+     * When checking nbf, iat or expiration times,
+     * we want to provide some extra leeway time to
+     * account for clock skew.
+     */
+    public static $leeway = 0;
+
+    public static $supported_algs = array(
+        'HS256' => array('hash_hmac', 'SHA256'),
+        'HS512' => array('hash_hmac', 'SHA512'),
+        'HS384' => array('hash_hmac', 'SHA384'),
+        'RS256' => array('openssl', 'SHA256'),
+    );
+
+    /**
+     * Decodes a JWT string into a PHP object.
+     *
+     * @param string      $jwt           The JWT
+     * @param string|Array|null $key     The secret key, or map of keys
+     * @param Array       $allowed_algs  List of supported verification algorithms
+     *
+     * @return object      The JWT's payload as a PHP object
+     *
+     * @throws DomainException              Algorithm was not provided
+     * @throws UnexpectedValueException     Provided JWT was invalid
+     * @throws SignatureInvalidException    Provided JWT was invalid because the signature verification failed
+     * @throws BeforeValidException         Provided JWT is trying to be used before it's eligible as defined by 'nbf'
+     * @throws BeforeValidException         Provided JWT is trying to be used before it's been created as defined by 'iat'
+     * @throws ExpiredException             Provided JWT has since expired, as defined by the 'exp' claim
+     *
+     * @uses jsonDecode
+     * @uses urlsafeB64Decode
+     */
+    public static function decode($jwt, $key = null, $allowed_algs = array())
+    {
+        $tks = explode('.', $jwt);
+        if (count($tks) != 3) {
+            throw new UnexpectedValueException('Wrong number of segments');
+        }
+        list($headb64, $bodyb64, $cryptob64) = $tks;
+        if (null === ($header = JWT::jsonDecode(JWT::urlsafeB64Decode($headb64)))) {
+            throw new UnexpectedValueException('Invalid header encoding');
+        }
+        if (null === $payload = JWT::jsonDecode(JWT::urlsafeB64Decode($bodyb64))) {
+            throw new UnexpectedValueException('Invalid claims encoding');
+        }
+        $sig = JWT::urlsafeB64Decode($cryptob64);
+        if (isset($key)) {
+            if (empty($header->alg)) {
+                throw new DomainException('Empty algorithm');
+            }
+            if (empty(self::$supported_algs[$header->alg])) {
+                throw new DomainException('Algorithm not supported');
+            }
+            if (!is_array($allowed_algs) || !in_array($header->alg, $allowed_algs)) {
+                throw new DomainException('Algorithm not allowed');
+            }
+            if (is_array($key) || $key instanceof \ArrayAccess) {
+                if (isset($header->kid)) {
+                    $key = $key[$header->kid];
+                } else {
+                    throw new DomainException('"kid" empty, unable to lookup correct key');
+                }
+            }
+
+            // Check the signature
+            if (!JWT::verify("$headb64.$bodyb64", $sig, $key, $header->alg)) {
+                throw new SignatureInvalidException('Signature verification failed');
+            }
+
+            // Check if the nbf if it is defined. This is the time that the
+            // token can actually be used. If it's not yet that time, abort.
+            if (isset($payload->nbf) && $payload->nbf > (time() + self::$leeway)) {
+                throw new BeforeValidException(
+                    'Cannot handle token prior to ' . date(DateTime::ISO8601, $payload->nbf)
+                );
+            }
+
+            // Check that this token has been created before 'now'. This prevents
+            // using tokens that have been created for later use (and haven't
+            // correctly used the nbf claim).
+            if (isset($payload->iat) && $payload->iat > (time() + self::$leeway)) {
+                throw new BeforeValidException(
+                    'Cannot handle token prior to ' . date(DateTime::ISO8601, $payload->iat)
+                );
+            }
+
+            // Check if this token has expired.
+            if (isset($payload->exp) && (time() - self::$leeway) >= $payload->exp) {
+                throw new ExpiredException('Expired token');
+            }
+        }
+
+        return $payload;
+    }
+
+    /**
+     * Converts and signs a PHP object or array into a JWT string.
+     *
+     * @param object|array $payload PHP object or array
+     * @param string       $key     The secret key
+     * @param string       $alg     The signing algorithm. Supported
+     *                              algorithms are 'HS256', 'HS384' and 'HS512'
+     *
+     * @return string      A signed JWT
+     * @uses jsonEncode
+     * @uses urlsafeB64Encode
+     */
+    public static function encode($payload, $key, $alg = 'HS256', $keyId = null)
+    {
+        $header = array('typ' => 'JWT', 'alg' => $alg);
+        if ($keyId !== null) {
+            $header['kid'] = $keyId;
+        }
+        $segments = array();
+        $segments[] = JWT::urlsafeB64Encode(JWT::jsonEncode($header));
+        $segments[] = JWT::urlsafeB64Encode(JWT::jsonEncode($payload));
+        $signing_input = implode('.', $segments);
+
+        $signature = JWT::sign($signing_input, $key, $alg);
+        $segments[] = JWT::urlsafeB64Encode($signature);
+
+        return implode('.', $segments);
+    }
+
+    /**
+     * Sign a string with a given key and algorithm.
+     *
+     * @param string $msg          The message to sign
+     * @param string|resource $key The secret key
+     * @param string $alg       The signing algorithm. Supported algorithms
+     *                               are 'HS256', 'HS384', 'HS512' and 'RS256'
+     *
+     * @return string          An encrypted message
+     * @throws DomainException Unsupported algorithm was specified
+     */
+    public static function sign($msg, $key, $alg = 'HS256')
+    {
+        if (empty(self::$supported_algs[$alg])) {
+            throw new DomainException('Algorithm not supported');
+        }
+        list($function, $algorithm) = self::$supported_algs[$alg];
+        switch($function) {
+            case 'hash_hmac':
+                return hash_hmac($algorithm, $msg, $key, true);
+            case 'openssl':
+                $signature = '';
+                $success = openssl_sign($msg, $signature, $key, $algorithm);
+                if (!$success) {
+                    throw new DomainException("OpenSSL unable to sign data");
+                } else {
+                    return $signature;
+                }
+        }
+    }
+
+    /**
+     * Verify a signature with the mesage, key and method. Not all methods
+     * are symmetric, so we must have a separate verify and sign method.
+     * @param string $msg the original message
+     * @param string $signature
+     * @param string|resource $key for HS*, a string key works. for RS*, must be a resource of an openssl public key
+     * @param string $alg
+     * @return bool
+     * @throws DomainException Invalid Algorithm or OpenSSL failure
+     */
+    private static function verify($msg, $signature, $key, $alg)
+    {
+        if (empty(self::$supported_algs[$alg])) {
+            throw new DomainException('Algorithm not supported');
+        }
+
+        list($function, $algorithm) = self::$supported_algs[$alg];
+        switch($function) {
+            case 'openssl':
+                $success = openssl_verify($msg, $signature, $key, $algorithm);
+                if (!$success) {
+                    throw new DomainException("OpenSSL unable to verify data: " . openssl_error_string());
+                } else {
+                    return $signature;
+                }
+            case 'hash_hmac':
+            default:
+                $hash = hash_hmac($algorithm, $msg, $key, true);
+                if (function_exists('hash_equals')) {
+                    return hash_equals($signature, $hash);
+                }
+                $len = min(self::safeStrlen($signature), self::safeStrlen($hash));
+
+                $status = 0;
+                for ($i = 0; $i < $len; $i++) {
+                    $status |= (ord($signature[$i]) ^ ord($hash[$i]));
+                }
+                $status |= (self::safeStrlen($signature) ^ self::safeStrlen($hash));
+
+                return ($status === 0);
+        }
+    }
+
+    /**
+     * Decode a JSON string into a PHP object.
+     *
+     * @param string $input JSON string
+     *
+     * @return object          Object representation of JSON string
+     * @throws DomainException Provided string was invalid JSON
+     */
+    public static function jsonDecode($input)
+    {
+        if (version_compare(PHP_VERSION, '5.4.0', '>=') && !(defined('JSON_C_VERSION') && PHP_INT_SIZE > 4)) {
+            /** In PHP >=5.4.0, json_decode() accepts an options parameter, that allows you
+             * to specify that large ints (like Steam Transaction IDs) should be treated as
+             * strings, rather than the PHP default behaviour of converting them to floats.
+             */
+            $obj = json_decode($input, false, 512, JSON_BIGINT_AS_STRING);
+        } else {
+            /** Not all servers will support that, however, so for older versions we must
+             * manually detect large ints in the JSON string and quote them (thus converting
+             *them to strings) before decoding, hence the preg_replace() call.
+             */
+            $max_int_length = strlen((string) PHP_INT_MAX) - 1;
+            $json_without_bigints = preg_replace('/:\s*(-?\d{'.$max_int_length.',})/', ': "$1"', $input);
+            $obj = json_decode($json_without_bigints);
+        }
+
+        if (function_exists('json_last_error') && $errno = json_last_error()) {
+            JWT::handleJsonError($errno);
+        } elseif ($obj === null && $input !== 'null') {
+            throw new DomainException('Null result with non-null input');
+        }
+        return $obj;
+    }
+
+    /**
+     * Encode a PHP object into a JSON string.
+     *
+     * @param object|array $input A PHP object or array
+     *
+     * @return string          JSON representation of the PHP object or array
+     * @throws DomainException Provided object could not be encoded to valid JSON
+     */
+    public static function jsonEncode($input)
+    {
+        $json = json_encode($input);
+        if (function_exists('json_last_error') && $errno = json_last_error()) {
+            JWT::handleJsonError($errno);
+        } elseif ($json === 'null' && $input !== null) {
+            throw new DomainException('Null result with non-null input');
+        }
+        return $json;
+    }
+
+    /**
+     * Decode a string with URL-safe Base64.
+     *
+     * @param string $input A Base64 encoded string
+     *
+     * @return string A decoded string
+     */
+    public static function urlsafeB64Decode($input)
+    {
+        $remainder = strlen($input) % 4;
+        if ($remainder) {
+            $padlen = 4 - $remainder;
+            $input .= str_repeat('=', $padlen);
+        }
+        return base64_decode(strtr($input, '-_', '+/'));
+    }
+
+    /**
+     * Encode a string with URL-safe Base64.
+     *
+     * @param string $input The string you want encoded
+     *
+     * @return string The base64 encode of what you passed in
+     */
+    public static function urlsafeB64Encode($input)
+    {
+        return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
+    }
+
+    /**
+     * Helper method to create a JSON error.
+     *
+     * @param int $errno An error number from json_last_error()
+     *
+     * @return void
+     */
+    private static function handleJsonError($errno)
+    {
+        $messages = array(
+            JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
+            JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
+            JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON'
+        );
+        throw new DomainException(
+            isset($messages[$errno])
+            ? $messages[$errno]
+            : 'Unknown JSON error: ' . $errno
+        );
+    }
+
+    /**
+     * Get the number of bytes in cryptographic strings.
+     *
+     * @param string
+     * @return int
+     */
+    private static function safeStrlen($str)
+    {
+        if (function_exists('mb_strlen')) {
+            return mb_strlen($str, '8bit');
+        }
+        return strlen($str);
+    }
+}