FM / src

/home/techb158/immovalet.com/vendor/firebase/php-jwt/src/

/home/techb158/immovalet.com/vendor/firebase/php-jwt/src

Name	Size	Mode	Actions
BeforeValidException.php	97	0644	edit dl rm
ExpiredException.php	93	0644	edit dl rm
JWK.php	5604	0644	edit dl rm
JWT.php	20233	0644	edit dl rm
SignatureInvalidException.php	102	0644	edit dl rm

Edit: /home/techb158/immovalet.com/vendor/firebase/php-jwt/src/JWT.php (20233B)

<?php

namespace Firebase\JWT;

use DomainException;
use Exception;
use InvalidArgumentException;
use UnexpectedValueException;
use DateTime;

/**
 * JSON Web Token implementation, based on this spec:
 * https://tools.ietf.org/html/rfc7519
 *
 * 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
{
    const ASN1_INTEGER = 0x02;
    const ASN1_SEQUENCE = 0x10;
    const ASN1_BIT_STRING = 0x03;

/**
     * When checking nbf, iat or expiration times,
     * we want to provide some extra leeway time to
     * account for clock skew.
     */
    public static $leeway = 0;

/**
     * Allow the current timestamp to be specified.
     * Useful for fixing a value within unit testing.
     *
     * Will default to PHP time() value if null.
     */
    public static $timestamp = null;

public static $supported_algs = array(
        'ES384' => array('openssl', 'SHA384'),
        'ES256' => array('openssl', 'SHA256'),
        'HS256' => array('hash_hmac', 'SHA256'),
        'HS384' => array('hash_hmac', 'SHA384'),
        'HS512' => array('hash_hmac', 'SHA512'),
        'RS256' => array('openssl', 'SHA256'),
        'RS384' => array('openssl', 'SHA384'),
        'RS512' => array('openssl', 'SHA512'),
        'EdDSA' => array('sodium_crypto', 'EdDSA'),
    );

/**
     * Decodes a JWT string into a PHP object.
     *
     * @param string                    $jwt            The JWT
     * @param string|array|resource     $key            The key, or map of keys.
     *                                                  If the algorithm used is asymmetric, this is the public key
     * @param array                     $allowed_algs   List of supported verification algorithms
     *                                                  Supported algorithms are 'ES384','ES256', 'HS256', 'HS384',
     *                                                  'HS512', 'RS256', 'RS384', and 'RS512'
     *
     * @return object The JWT's payload as a PHP object
     *
     * @throws InvalidArgumentException     Provided JWT was empty
     * @throws UnexpectedValueException     Provided JWT was invalid
     * @throws SignatureInvalidException    Provided JWT was invalid because the signature verification failed
     * @throws BeforeValidException         Provided JWT is trying to be used before it's eligible as defined by 'nbf'
     * @throws BeforeValidException         Provided JWT is trying to be used before it's been created as defined by 'iat'
     * @throws ExpiredException             Provided JWT has since expired, as defined by the 'exp' claim
     *
     * @uses jsonDecode
     * @uses urlsafeB64Decode
     */
    public static function decode($jwt, $key, array $allowed_algs = array())
    {
        $timestamp = \is_null(static::$timestamp) ? \time() : static::$timestamp;

if (empty($key)) {
            throw new InvalidArgumentException('Key may not be empty');
        }
        $tks = \explode('.', $jwt);
        if (\count($tks) != 3) {
            throw new UnexpectedValueException('Wrong number of segments');
        }
        list($headb64, $bodyb64, $cryptob64) = $tks;
        if (null === ($header = static::jsonDecode(static::urlsafeB64Decode($headb64)))) {
            throw new UnexpectedValueException('Invalid header encoding');
        }
        if (null === $payload = static::jsonDecode(static::urlsafeB64Decode($bodyb64))) {
            throw new UnexpectedValueException('Invalid claims encoding');
        }
        if (false === ($sig = static::urlsafeB64Decode($cryptob64))) {
            throw new UnexpectedValueException('Invalid signature encoding');
        }
        if (empty($header->alg)) {
            throw new UnexpectedValueException('Empty algorithm');
        }
        if (empty(static::$supported_algs[$header->alg])) {
            throw new UnexpectedValueException('Algorithm not supported');
        }
        if (!\in_array($header->alg, $allowed_algs)) {
            throw new UnexpectedValueException('Algorithm not allowed');
        }
        if ($header->alg === 'ES256' || $header->alg === 'ES384') {
            // OpenSSL expects an ASN.1 DER sequence for ES256/ES384 signatures
            $sig = self::signatureToDER($sig);
        }

if (\is_array($key) || $key instanceof \ArrayAccess) {
            if (isset($header->kid)) {
                if (!isset($key[$header->kid])) {
                    throw new UnexpectedValueException('"kid" invalid, unable to lookup correct key');
                }
                $key = $key[$header->kid];
            } else {
                throw new UnexpectedValueException('"kid" empty, unable to lookup correct key');
            }
        }

// Check the signature
        if (!static::verify("$headb64.$bodyb64", $sig, $key, $header->alg)) {
            throw new SignatureInvalidException('Signature verification failed');
        }

// Check 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) && $payload->nbf > ($timestamp + static::$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) && $payload->iat > ($timestamp + static::$leeway)) {
            throw new BeforeValidException(
                'Cannot handle token prior to ' . \date(DateTime::ISO8601, $payload->iat)
            );
        }

// Check if this token has expired.
        if (isset($payload->exp) && ($timestamp - static::$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|resource   $key        The secret key.
     *                                      If the algorithm used is asymmetric, this is the private key
     * @param string            $alg        The signing algorithm.
     *                                      Supported algorithms are 'ES384','ES256', 'HS256', 'HS384',
     *                                      'HS512', 'RS256', 'RS384', and 'RS512'
     * @param mixed             $keyId
     * @param array             $head       An array with header elements to attach
     *
     * @return string A signed JWT
     *
     * @uses jsonEncode
     * @uses urlsafeB64Encode
     */
    public static function encode($payload, $key, $alg = 'HS256', $keyId = null, $head = null)
    {
        $header = array('typ' => 'JWT', 'alg' => $alg);
        if ($keyId !== null) {
            $header['kid'] = $keyId;
        }
        if (isset($head) && \is_array($head)) {
            $header = \array_merge($head, $header);
        }
        $segments = array();
        $segments[] = static::urlsafeB64Encode(static::jsonEncode($header));
        $segments[] = static::urlsafeB64Encode(static::jsonEncode($payload));
        $signing_input = \implode('.', $segments);

$signature = static::sign($signing_input, $key, $alg);
        $segments[] = static::urlsafeB64Encode($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            $alg    The signing algorithm.
     *                                  Supported algorithms are 'ES384','ES256', 'HS256', 'HS384',
     *                                  'HS512', 'RS256', 'RS384', and 'RS512'
     *
     * @return string An encrypted message
     *
     * @throws DomainException Unsupported algorithm or bad key was specified
     */
    public static function sign($msg, $key, $alg = 'HS256')
    {
        if (empty(static::$supported_algs[$alg])) {
            throw new DomainException('Algorithm not supported');
        }
        list($function, $algorithm) = static::$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");
                }
                if ($alg === 'ES256') {
                    $signature = self::signatureFromDER($signature, 256);
                } elseif ($alg === 'ES384') {
                    $signature = self::signatureFromDER($signature, 384);
                }
                return $signature;
            case 'sodium_crypto':
                if (!function_exists('sodium_crypto_sign_detached')) {
                    throw new DomainException('libsodium is not available');
                }
                try {
                    // The last non-empty line is used as the key.
                    $lines = array_filter(explode("\n", $key));
                    $key = base64_decode(end($lines));
                    return sodium_crypto_sign_detached($msg, $key);
                } catch (Exception $e) {
                    throw new DomainException($e->getMessage(), 0, $e);
                }
        }
    }

/**
     * Verify a signature with the message, key and method. Not all methods
     * are symmetric, so we must have a separate verify and sign method.
     *
     * @param string            $msg        The original message (header and body)
     * @param string            $signature  The original signature
     * @param string|resource   $key        For HS*, a string key works. for RS*, must be a resource of an openssl public key
     * @param string            $alg        The algorithm
     *
     * @return bool
     *
     * @throws DomainException Invalid Algorithm, bad key, or OpenSSL failure
     */
    private static function verify($msg, $signature, $key, $alg)
    {
        if (empty(static::$supported_algs[$alg])) {
            throw new DomainException('Algorithm not supported');
        }

list($function, $algorithm) = static::$supported_algs[$alg];
        switch ($function) {
            case 'openssl':
                $success = \openssl_verify($msg, $signature, $key, $algorithm);
                if ($success === 1) {
                    return true;
                } elseif ($success === 0) {
                    return false;
                }
                // returns 1 on success, 0 on failure, -1 on error.
                throw new DomainException(
                    'OpenSSL error: ' . \openssl_error_string()
                );
            case 'sodium_crypto':
              if (!function_exists('sodium_crypto_sign_verify_detached')) {
                  throw new DomainException('libsodium is not available');
              }
              try {
                  // The last non-empty line is used as the key.
                  $lines = array_filter(explode("\n", $key));
                  $key = base64_decode(end($lines));
                  return sodium_crypto_sign_verify_detached($signature, $msg, $key);
              } catch (Exception $e) {
                  throw new DomainException($e->getMessage(), 0, $e);
              }
            case 'hash_hmac':
            default:
                $hash = \hash_hmac($algorithm, $msg, $key, true);
                if (\function_exists('hash_equals')) {
                    return \hash_equals($signature, $hash);
                }
                $len = \min(static::safeStrlen($signature), static::safeStrlen($hash));

$status = 0;
                for ($i = 0; $i < $len; $i++) {
                    $status |= (\ord($signature[$i]) ^ \ord($hash[$i]));
                }
                $status |= (static::safeStrlen($signature) ^ static::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 ($errno = \json_last_error()) {
            static::handleJsonError($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 ($errno = \json_last_error()) {
            static::handleJsonError($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)
    {
        $messages = array(
            JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
            JSON_ERROR_STATE_MISMATCH => 'Invalid or malformed JSON',
            JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
            JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON',
            JSON_ERROR_UTF8 => 'Malformed UTF-8 characters' //PHP >= 5.3.3
        );
        throw new DomainException(
            isset($messages[$errno])
            ? $messages[$errno]
            : 'Unknown JSON error: ' . $errno
        );
    }

/**
     * Get the number of bytes in cryptographic strings.
     *
     * @param string $str
     *
     * @return int
     */
    private static function safeStrlen($str)
    {
        if (\function_exists('mb_strlen')) {
            return \mb_strlen($str, '8bit');
        }
        return \strlen($str);
    }

/**
     * Convert an ECDSA signature to an ASN.1 DER sequence
     *
     * @param   string $sig The ECDSA signature to convert
     * @return  string The encoded DER object
     */
    private static function signatureToDER($sig)
    {
        // Separate the signature into r-value and s-value
        list($r, $s) = \str_split($sig, (int) (\strlen($sig) / 2));

// Trim leading zeros
        $r = \ltrim($r, "\x00");
        $s = \ltrim($s, "\x00");

// Convert r-value and s-value from unsigned big-endian integers to
        // signed two's complement
        if (\ord($r[0]) > 0x7f) {
            $r = "\x00" . $r;
        }
        if (\ord($s[0]) > 0x7f) {
            $s = "\x00" . $s;
        }

return self::encodeDER(
            self::ASN1_SEQUENCE,
            self::encodeDER(self::ASN1_INTEGER, $r) .
            self::encodeDER(self::ASN1_INTEGER, $s)
        );
    }

/**
     * Encodes a value into a DER object.
     *
     * @param   int     $type DER tag
     * @param   string  $value the value to encode
     * @return  string  the encoded object
     */
    private static function encodeDER($type, $value)
    {
        $tag_header = 0;
        if ($type === self::ASN1_SEQUENCE) {
            $tag_header |= 0x20;
        }

// Type
        $der = \chr($tag_header | $type);

// Length
        $der .= \chr(\strlen($value));

return $der . $value;
    }

/**
     * Encodes signature from a DER object.
     *
     * @param   string  $der binary signature in DER format
     * @param   int     $keySize the number of bits in the key
     * @return  string  the signature
     */
    private static function signatureFromDER($der, $keySize)
    {
        // OpenSSL returns the ECDSA signatures as a binary ASN.1 DER SEQUENCE
        list($offset, $_) = self::readDER($der);
        list($offset, $r) = self::readDER($der, $offset);
        list($offset, $s) = self::readDER($der, $offset);

// Convert r-value and s-value from signed two's compliment to unsigned
        // big-endian integers
        $r = \ltrim($r, "\x00");
        $s = \ltrim($s, "\x00");

// Pad out r and s so that they are $keySize bits long
        $r = \str_pad($r, $keySize / 8, "\x00", STR_PAD_LEFT);
        $s = \str_pad($s, $keySize / 8, "\x00", STR_PAD_LEFT);

return $r . $s;
    }

/**
     * Reads binary DER-encoded data and decodes into a single object
     *
     * @param string $der the binary data in DER format
     * @param int $offset the offset of the data stream containing the object
     * to decode
     * @return array [$offset, $data] the new offset and the decoded object
     */
    private static function readDER($der, $offset = 0)
    {
        $pos = $offset;
        $size = \strlen($der);
        $constructed = (\ord($der[$pos]) >> 5) & 0x01;
        $type = \ord($der[$pos++]) & 0x1f;

// Length
        $len = \ord($der[$pos++]);
        if ($len & 0x80) {
            $n = $len & 0x1f;
            $len = 0;
            while ($n-- && $pos < $size) {
                $len = ($len << 8) | \ord($der[$pos++]);
            }
        }

// Value
        if ($type == self::ASN1_BIT_STRING) {
            $pos++; // Skip the first contents octet (padding indicator)
            $data = \substr($der, $pos, $len - 1);
            $pos += $len - 1;
        } elseif (!$constructed) {
            $data = \substr($der, $pos, $len);
            $pos += $len;
        } else {
            $data = null;
        }

return array($pos, $data);
    }
}

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