/phpseclib/Crypt/Hash.php
PHP | 1484 lines | 850 code | 146 blank | 488 comment | 85 complexity | b2d2a8012f69ec94dea04b224ef8f280 MD5 | raw file
- <?php
- /**
- * Wrapper around hash() and hash_hmac() functions supporting truncated hashes
- * such as sha256-96. Any hash algorithm returned by hash_algos() (and
- * truncated versions thereof) are supported.
- *
- * If {@link self::setKey() setKey()} is called, {@link self::hash() hash()} will
- * return the HMAC as opposed to the hash.
- *
- * Here's a short example of how to use this library:
- * <code>
- * <?php
- * include 'vendor/autoload.php';
- *
- * $hash = new \phpseclib3\Crypt\Hash('sha512');
- *
- * $hash->setKey('abcdefg');
- *
- * echo base64_encode($hash->hash('abcdefg'));
- * ?>
- * </code>
- *
- * @category Crypt
- * @package Hash
- * @author Jim Wigginton <terrafrost@php.net>
- * @copyright 2015 Jim Wigginton
- * @author Andreas Fischer <bantu@phpbb.com>
- * @copyright 2015 Andreas Fischer
- * @license http://www.opensource.org/licenses/mit-license.html MIT License
- * @link http://phpseclib.sourceforge.net
- */
- namespace phpseclib3\Crypt;
- use phpseclib3\Math\BigInteger;
- use phpseclib3\Exception\UnsupportedAlgorithmException;
- use phpseclib3\Exception\InsufficientSetupException;
- use phpseclib3\Common\Functions\Strings;
- use phpseclib3\Crypt\AES;
- use phpseclib3\Math\PrimeField;
- /**
- * @package Hash
- * @author Jim Wigginton <terrafrost@php.net>
- * @author Andreas Fischer <bantu@phpbb.com>
- * @access public
- */
- class Hash
- {
- /**
- * Padding Types
- *
- * @access private
- */
- //const PADDING_KECCAK = 1;
- /**
- * Padding Types
- *
- * @access private
- */
- const PADDING_SHA3 = 2;
- /**
- * Padding Types
- *
- * @access private
- */
- const PADDING_SHAKE = 3;
- /**
- * Padding Type
- *
- * Only used by SHA3
- *
- * @var int
- * @access private
- */
- private $paddingType = 0;
- /**
- * Hash Parameter
- *
- * @see self::setHash()
- * @var int
- * @access private
- */
- private $hashParam;
- /**
- * Byte-length of hash output (Internal HMAC)
- *
- * @see self::setHash()
- * @var int
- * @access private
- */
- private $length;
- /**
- * Hash Algorithm
- *
- * @see self::setHash()
- * @var string
- * @access private
- */
- private $algo;
- /**
- * Key
- *
- * @see self::setKey()
- * @var string
- * @access private
- */
- private $key = false;
- /**
- * Nonce
- *
- * @see self::setNonce()
- * @var string
- * @access private
- */
- private $nonce = false;
- /**
- * Hash Parameters
- *
- * @var array
- * @access private
- */
- private $parameters = [];
- /**
- * Computed Key
- *
- * @see self::_computeKey()
- * @var string
- * @access private
- */
- private $computedKey = false;
- /**
- * Outer XOR (Internal HMAC)
- *
- * Used only for sha512/*
- *
- * @see self::hash()
- * @var string
- * @access private
- */
- private $opad;
- /**
- * Inner XOR (Internal HMAC)
- *
- * Used only for sha512/*
- *
- * @see self::hash()
- * @var string
- * @access private
- */
- private $ipad;
- /**
- * Recompute AES Key
- *
- * Used only for umac
- *
- * @see self::hash()
- * @var boolean
- * @access private
- */
- private $recomputeAESKey;
- /**
- * umac cipher object
- *
- * @see self::hash()
- * @var \phpseclib3\Crypt\AES
- * @access private
- */
- private $c;
- /**
- * umac pad
- *
- * @see self::hash()
- * @var string
- * @access private
- */
- private $pad;
- /**#@+
- * UMAC variables
- *
- * @var PrimeField
- */
- private static $factory36;
- private static $factory64;
- private static $factory128;
- private static $offset64;
- private static $offset128;
- private static $marker64;
- private static $marker128;
- private static $maxwordrange64;
- private static $maxwordrange128;
- /**#@-*/
- /**
- * Default Constructor.
- *
- * @param string $hash
- * @access public
- */
- public function __construct($hash = 'sha256')
- {
- $this->setHash($hash);
- }
- /**
- * Sets the key for HMACs
- *
- * Keys can be of any length.
- *
- * @access public
- * @param string $key
- */
- public function setKey($key = false)
- {
- $this->key = $key;
- $this->computeKey();
- $this->recomputeAESKey = true;
- }
- /**
- * Sets the nonce for UMACs
- *
- * Keys can be of any length.
- *
- * @access public
- * @param string $nonce
- */
- public function setNonce($nonce = false)
- {
- switch (true) {
- case !is_string($nonce):
- case strlen($nonce) > 0 && strlen($nonce) <= 16:
- $this->recomputeAESKey = true;
- $this->nonce = $nonce;
- return;
- }
- throw new \LengthException('The nonce length must be between 1 and 16 bytes, inclusive');
- }
- /**
- * Pre-compute the key used by the HMAC
- *
- * Quoting http://tools.ietf.org/html/rfc2104#section-2, "Applications that use keys longer than B bytes
- * will first hash the key using H and then use the resultant L byte string as the actual key to HMAC."
- *
- * As documented in https://www.reddit.com/r/PHP/comments/9nct2l/symfonypolyfill_hash_pbkdf2_correct_fix_for/
- * when doing an HMAC multiple times it's faster to compute the hash once instead of computing it during
- * every call
- *
- * @access private
- */
- private function computeKey()
- {
- if ($this->key === false) {
- $this->computedKey = false;
- return;
- }
- if (strlen($this->key) <= $this->getBlockLengthInBytes()) {
- $this->computedKey = $this->key;
- return;
- }
- $this->computedKey = is_array($this->algo) ?
- call_user_func($this->algo, $this->key) :
- hash($this->algo, $this->key, true);
- }
- /**
- * Gets the hash function.
- *
- * As set by the constructor or by the setHash() method.
- *
- * @access public
- * @return string
- */
- public function getHash()
- {
- return $this->hashParam;
- }
- /**
- * Sets the hash function.
- *
- * @access public
- * @param string $hash
- */
- public function setHash($hash)
- {
- $this->hashParam = $hash = strtolower($hash);
- switch ($hash) {
- case 'umac-32':
- case 'umac-64':
- case 'umac-96':
- case 'umac-128':
- $this->blockSize = 128;
- $this->length = abs(substr($hash, -3)) >> 3;
- $this->algo = 'umac';
- return;
- case 'md2-96':
- case 'md5-96':
- case 'sha1-96':
- case 'sha224-96':
- case 'sha256-96':
- case 'sha384-96':
- case 'sha512-96':
- case 'sha512/224-96':
- case 'sha512/256-96':
- $hash = substr($hash, 0, -3);
- $this->length = 12; // 96 / 8 = 12
- break;
- case 'md2':
- case 'md5':
- $this->length = 16;
- break;
- case 'sha1':
- $this->length = 20;
- break;
- case 'sha224':
- case 'sha512/224':
- case 'sha3-224':
- $this->length = 28;
- break;
- case 'sha256':
- case 'sha512/256':
- case 'sha3-256':
- $this->length = 32;
- break;
- case 'sha384':
- case 'sha3-384':
- $this->length = 48;
- break;
- case 'sha512':
- case 'sha3-512':
- $this->length = 64;
- break;
- default:
- if (preg_match('#^(shake(?:128|256))-(\d+)$#', $hash, $matches)) {
- $this->paddingType = self::PADDING_SHAKE;
- $hash = $matches[1];
- $this->length = $matches[2] >> 3;
- } else {
- throw new UnsupportedAlgorithmException(
- "$hash is not a supported algorithm"
- );
- }
- }
- switch ($hash) {
- case 'md2':
- case 'md2-96':
- $this->blockSize = 128;
- break;
- case 'md5-96':
- case 'sha1-96':
- case 'sha224-96':
- case 'sha256-96':
- case 'md5':
- case 'sha1':
- case 'sha224':
- case 'sha256':
- $this->blockSize = 512;
- break;
- case 'sha3-224':
- $this->blockSize = 1152; // 1600 - 2*224
- break;
- case 'sha3-256':
- case 'shake256':
- $this->blockSize = 1088; // 1600 - 2*256
- break;
- case 'sha3-384':
- $this->blockSize = 832; // 1600 - 2*384
- break;
- case 'sha3-512':
- $this->blockSize = 576; // 1600 - 2*512
- break;
- case 'shake128':
- $this->blockSize = 1344; // 1600 - 2*128
- break;
- default:
- $this->blockSize = 1024;
- }
- if (in_array(substr($hash, 0, 5), ['sha3-', 'shake'])) {
- // PHP 7.1.0 introduced support for "SHA3 fixed mode algorithms":
- // http://php.net/ChangeLog-7.php#7.1.0
- if (version_compare(PHP_VERSION, '7.1.0') < 0 || substr($hash, 0,5) == 'shake') {
- //preg_match('#(\d+)$#', $hash, $matches);
- //$this->parameters['capacity'] = 2 * $matches[1]; // 1600 - $this->blockSize
- //$this->parameters['rate'] = 1600 - $this->parameters['capacity']; // == $this->blockSize
- if (!$this->paddingType) {
- $this->paddingType = self::PADDING_SHA3;
- }
- $this->parameters = [
- 'capacity' => 1600 - $this->blockSize,
- 'rate' => $this->blockSize,
- 'length' => $this->length,
- 'padding' => $this->paddingType
- ];
- $hash = ['phpseclib3\Crypt\Hash', PHP_INT_SIZE == 8 ? 'sha3_64' : 'sha3_32'];
- }
- }
- if ($hash == 'sha512/224' || $hash == 'sha512/256') {
- // PHP 7.1.0 introduced sha512/224 and sha512/256 support:
- // http://php.net/ChangeLog-7.php#7.1.0
- if (version_compare(PHP_VERSION, '7.1.0') < 0) {
- // from http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf#page=24
- $initial = $hash == 'sha512/256' ?
- [
- '22312194FC2BF72C', '9F555FA3C84C64C2', '2393B86B6F53B151', '963877195940EABD',
- '96283EE2A88EFFE3', 'BE5E1E2553863992', '2B0199FC2C85B8AA', '0EB72DDC81C52CA2'
- ] :
- [
- '8C3D37C819544DA2', '73E1996689DCD4D6', '1DFAB7AE32FF9C82', '679DD514582F9FCF',
- '0F6D2B697BD44DA8', '77E36F7304C48942', '3F9D85A86A1D36C8', '1112E6AD91D692A1'
- ];
- for ($i = 0; $i < 8; $i++) {
- $initial[$i] = new BigInteger($initial[$i], 16);
- $initial[$i]->setPrecision(64);
- }
- $this->parameters = compact('initial');
- $hash = ['phpseclib3\Crypt\Hash', 'sha512'];
- }
- }
- if (is_array($hash)) {
- $b = $this->blockSize >> 3;
- $this->ipad = str_repeat(chr(0x36), $b);
- $this->opad = str_repeat(chr(0x5C), $b);
- }
- $this->algo = $hash;
- $this->computeKey();
- }
- /**
- * KDF: Key-Derivation Function
- *
- * The key-derivation function generates pseudorandom bits used to key the hash functions.
- *
- * @param int $index a non-negative integer less than 2^64
- * @param int $numbytes a non-negative integer less than 2^64
- * @return string string of length numbytes bytes
- */
- private function kdf($index, $numbytes)
- {
- $this->c->setIV(pack('N4', 0, $index, 0, 1));
- return $this->c->encrypt(str_repeat("\0", $numbytes));
- }
- /**
- * PDF Algorithm
- *
- * @return string string of length taglen bytes.
- */
- private function pdf()
- {
- $k = $this->key;
- $nonce = $this->nonce;
- $taglen = $this->length;
- //
- // Extract and zero low bit(s) of Nonce if needed
- //
- if ($taglen <= 8) {
- $last = strlen($nonce) - 1;
- $mask = $taglen == 4 ? "\3" : "\1";
- $index = $nonce[$last] & $mask;
- $nonce[$last] = $nonce[$last] ^ $index;
- }
- //
- // Make Nonce BLOCKLEN bytes by appending zeroes if needed
- //
- $nonce = str_pad($nonce, 16, "\0");
- //
- // Generate subkey, encipher and extract indexed substring
- //
- $kp = $this->kdf(0, 16);
- $c = new AES('ctr');
- $c->disablePadding();
- $c->setKey($kp);
- $c->setIV($nonce);
- $t = $c->encrypt("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");
- // we could use ord() but per https://paragonie.com/blog/2016/06/constant-time-encoding-boring-cryptography-rfc-4648-and-you
- // unpack() doesn't leak timing info
- return $taglen <= 8 ?
- substr($t, unpack('C', $index)[1] * $taglen, $taglen) :
- substr($t, 0, $taglen);
- }
- /**
- * UHASH Algorithm
- *
- * @param string $m string of length less than 2^67 bits.
- * @param int $taglen the integer 4, 8, 12 or 16.
- * @return string string of length taglen bytes.
- */
- private function uhash($m, $taglen)
- {
- //
- // One internal iteration per 4 bytes of output
- //
- $iters = $taglen >> 2;
- //
- // Define total key needed for all iterations using KDF.
- // L1Key reuses most key material between iterations.
- //
- //$L1Key = $this->kdf(1, 1024 + ($iters - 1) * 16);
- $L1Key = $this->kdf(1, (1024 + ($iters - 1)) * 16);
- $L2Key = $this->kdf(2, $iters * 24);
- $L3Key1 = $this->kdf(3, $iters * 64);
- $L3Key2 = $this->kdf(4, $iters * 4);
- //
- // For each iteration, extract key and do three-layer hash.
- // If bytelength(M) <= 1024, then skip L2-HASH.
- //
- $y = '';
- for ($i = 0; $i < $iters; $i++) {
- $L1Key_i = substr($L1Key, $i * 16, 1024);
- $L2Key_i = substr($L2Key, $i * 24, 24);
- $L3Key1_i = substr($L3Key1, $i * 64, 64);
- $L3Key2_i = substr($L3Key2, $i * 4, 4);
- $a = self::L1Hash($L1Key_i, $m);
- $b = strlen($m) <= 1024 ? "\0\0\0\0\0\0\0\0$a" : self::L2Hash($L2Key_i, $a);
- $c = self::L3Hash($L3Key1_i, $L3Key2_i, $b);
- $y.= $c;
- }
- return $y;
- }
- /**
- * L1-HASH Algorithm
- *
- * The first-layer hash breaks the message into 1024-byte chunks and
- * hashes each with a function called NH. Concatenating the results
- * forms a string, which is up to 128 times shorter than the original.
- *
- * @param string $k string of length 1024 bytes.
- * @param string $m string of length less than 2^67 bits.
- * @return string string of length (8 * ceil(bitlength(M)/8192)) bytes.
- */
- private static function L1Hash($k, $m)
- {
- //
- // Break M into 1024 byte chunks (final chunk may be shorter)
- //
- $m = str_split($m, 1024);
- //
- // For each chunk, except the last: endian-adjust, NH hash
- // and add bit-length. Use results to build Y.
- //
- $length = new BigInteger(1024 * 8);
- $y = '';
- for ($i = 0; $i < count($m) - 1; $i++) {
- $m[$i] = pack('N*', ...unpack('V*', $m[$i])); // ENDIAN-SWAP
- $y.= static::nh($k, $m[$i], $length);
- }
- //
- // For the last chunk: pad to 32-byte boundary, endian-adjust,
- // NH hash and add bit-length. Concatenate the result to Y.
- //
- $length = strlen($m[$i]);
- $pad = 32 - ($length % 32);
- $pad = max(32, $length + $pad % 32);
- $m[$i] = str_pad($m[$i], $pad, "\0"); // zeropad
- $m[$i] = pack('N*', ...unpack('V*', $m[$i])); // ENDIAN-SWAP
- $y.= static::nh($k, $m[$i], new BigInteger($length * 8));
- return $y;
- }
- /**
- * NH Algorithm
- *
- * @param string $k string of length 1024 bytes.
- * @param string $m string with length divisible by 32 bytes.
- * @return string string of length 8 bytes.
- */
- private static function nh($k, $m, $length)
- {
- $toUInt32 = function($x) {
- $x = new BigInteger($x, 256);
- $x->setPrecision(32);
- return $x;
- };
- //
- // Break M and K into 4-byte chunks
- //
- //$t = strlen($m) >> 2;
- $m = str_split($m, 4);
- $t = count($m);
- $k = str_split($k, 4);
- $k = array_pad(array_slice($k, 0, $t), $t, 0);
- $m = array_map($toUInt32, $m);
- $k = array_map($toUInt32, $k);
- //
- // Perform NH hash on the chunks, pairing words for multiplication
- // which are 4 apart to accommodate vector-parallelism.
- //
- $y = new BigInteger;
- $y->setPrecision(64);
- $i = 0;
- while ($i < $t) {
- $temp = $m[$i]->add($k[$i]);
- $temp->setPrecision(64);
- $temp = $temp->multiply($m[$i + 4]->add($k[$i + 4]));
- $y = $y->add($temp);
- $temp = $m[$i + 1]->add($k[$i + 1]);
- $temp->setPrecision(64);
- $temp = $temp->multiply($m[$i + 5]->add($k[$i + 5]));
- $y = $y->add($temp);
- $temp = $m[$i + 2]->add($k[$i + 2]);
- $temp->setPrecision(64);
- $temp = $temp->multiply($m[$i + 6]->add($k[$i + 6]));
- $y = $y->add($temp);
- $temp = $m[$i + 3]->add($k[$i + 3]);
- $temp->setPrecision(64);
- $temp = $temp->multiply($m[$i + 7]->add($k[$i + 7]));
- $y = $y->add($temp);
- $i+= 8;
- }
- return $y->add($length)->toBytes();
- }
- /**
- * L2-HASH: Second-Layer Hash
- *
- * The second-layer rehashes the L1-HASH output using a polynomial hash
- * called POLY. If the L1-HASH output is long, then POLY is called once
- * on a prefix of the L1-HASH output and called using different settings
- * on the remainder. (This two-step hashing of the L1-HASH output is
- * needed only if the message length is greater than 16 megabytes.)
- * Careful implementation of POLY is necessary to avoid a possible
- * timing attack (see Section 6.6 for more information).
- *
- * @param string $k string of length 24 bytes.
- * @param string $m string of length less than 2^64 bytes.
- * @return string string of length 16 bytes.
- */
- private static function L2Hash($k, $m)
- {
- //
- // Extract keys and restrict to special key-sets
- //
- $k64 = $k & "\x01\xFF\xFF\xFF\x01\xFF\xFF\xFF";
- $k64 = new BigInteger($k64, 256);
- $k128 = substr($k, 8) & "\x01\xFF\xFF\xFF\x01\xFF\xFF\xFF\x01\xFF\xFF\xFF\x01\xFF\xFF\xFF";
- $k128 = new BigInteger($k128, 256);
- //
- // If M is no more than 2^17 bytes, hash under 64-bit prime,
- // otherwise, hash first 2^17 bytes under 64-bit prime and
- // remainder under 128-bit prime.
- //
- if (strlen($m) <= 0x20000) { // 2^14 64-bit words
- $y = self::poly(64, self::$maxwordrange64, $k64, $m);
- } else {
- $m_1 = substr($m, 0, 0x20000); // 1 << 17
- $m_2 = substr($m, 0x20000) . "\x80";
- $length = strlen($m_2);
- $pad = 16 - ($length % 16);
- $pad%= 16;
- $m_2 = str_pad($m_2, $length + $pad, "\0"); // zeropad
- $y = self::poly(64, self::$maxwordrange64, $k64, $m_1);
- $y = str_pad($y, 16, "\0", STR_PAD_LEFT);
- $y = self::poly(128, self::$maxwordrange128, $k128, $y . $m_2);
- }
- return str_pad($y, 16, "\0", STR_PAD_LEFT);
- }
- /**
- * POLY Algorithm
- *
- * @param int $wordbits the integer 64 or 128.
- * @param BigInteger $maxwordrange positive integer less than 2^wordbits.
- * @param BigInteger $k integer in the range 0 ... prime(wordbits) - 1.
- * @param string $m string with length divisible by (wordbits / 8) bytes.
- * @return integer in the range 0 ... prime(wordbits) - 1.
- */
- private static function poly($wordbits, $maxwordrange, $k, $m)
- {
- //
- // Define constants used for fixing out-of-range words
- //
- $wordbytes = $wordbits >> 3;
- if ($wordbits == 128) {
- $factory = self::$factory128;
- $offset = self::$offset128;
- $marker = self::$marker128;
- } else {
- $factory = self::$factory64;
- $offset = self::$offset64;
- $marker = self::$marker64;
- }
- $k = $factory->newInteger($k);
- //
- // Break M into chunks of length wordbytes bytes
- //
- $m_i = str_split($m, $wordbytes);
- //
- // Each input word m is compared with maxwordrange. If not smaller
- // then 'marker' and (m - offset), both in range, are hashed.
- //
- $y = $factory->newInteger(new BigInteger(1));
- foreach ($m_i as $m) {
- $m = $factory->newInteger(new BigInteger($m, 256));
- if ($m->compare($maxwordrange) >= 0) {
- $y = $k->multiply($y)->add($marker);
- $y = $k->multiply($y)->add($m->subtract($offset));
- } else {
- $y = $k->multiply($y)->add($m);
- }
- }
- return $y->toBytes();
- }
- /**
- * L3-HASH: Third-Layer Hash
- *
- * The output from L2-HASH is 16 bytes long. This final hash function
- * hashes the 16-byte string to a fixed length of 4 bytes.
- *
- * @param string $k1 string of length 64 bytes.
- * @param string $k2 string of length 4 bytes.
- * @param string $m string of length 16 bytes.
- * @return string string of length 4 bytes.
- */
- private static function L3Hash($k1, $k2, $m)
- {
- $factory = self::$factory36;
- $y = $factory->newInteger(new BigInteger());
- for ($i = 0; $i < 8; $i++) {
- $m_i = $factory->newInteger(new BigInteger(substr($m, 2 * $i, 2), 256));
- $k_i = $factory->newInteger(new BigInteger(substr($k1, 8 * $i, 8), 256));
- $y = $y->add($m_i->multiply($k_i));
- }
- $y = str_pad(substr($y->toBytes(), -4), 4, "\0", STR_PAD_LEFT);
- $y = $y ^ $k2;
- return $y;
- }
- /**
- * Compute the Hash / HMAC / UMAC.
- *
- * @access public
- * @param string $text
- * @return string
- */
- public function hash($text)
- {
- $algo = $this->algo;
- if ($algo == 'umac') {
- if ($this->recomputeAESKey) {
- if (!is_string($this->nonce)) {
- throw new InsufficientSetupException('No nonce has been set');
- }
- if (!is_string($this->key)) {
- throw new InsufficientSetupException('No key has been set');
- }
- if (strlen($this->key) != 16) {
- throw new \LengthException('Key must be 16 bytes long');
- }
- if (!isset(self::$maxwordrange64)) {
- $one = new BigInteger(1);
- $prime36 = new BigInteger("\x00\x00\x00\x0F\xFF\xFF\xFF\xFB", 256);
- self::$factory36 = new PrimeField($prime36);
- $prime64 = new BigInteger("\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xC5", 256);
- self::$factory64 = new PrimeField($prime64);
- $prime128 = new BigInteger("\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x61", 256);
- self::$factory128 = new PrimeField($prime128);
- self::$offset64 = new BigInteger("\1\0\0\0\0\0\0\0\0", 256);
- self::$offset64 = self::$factory64->newInteger(self::$offset64->subtract($prime64));
- self::$offset128 = new BigInteger("\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 256);
- self::$offset128 = self::$factory128->newInteger(self::$offset128->subtract($prime128));
- self::$marker64 = self::$factory64->newInteger($prime64->subtract($one));
- self::$marker128 = self::$factory128->newInteger($prime128->subtract($one));
- $maxwordrange64 = $one->bitwise_leftShift(64)->subtract($one->bitwise_leftShift(32));
- self::$maxwordrange64 = self::$factory64->newInteger($maxwordrange64);
- $maxwordrange128 = $one->bitwise_leftShift(128)->subtract($one->bitwise_leftShift(96));
- self::$maxwordrange128 = self::$factory128->newInteger($maxwordrange128);
- }
- $this->c = new AES('ctr');
- $this->c->disablePadding();
- $this->c->setKey($this->key);
- $this->pad = $this->pdf();
- $this->recomputeAESKey = false;
- }
- $hashedmessage = $this->uhash($text, $this->length);
- return $hashedmessage ^ $this->pad;
- }
- if (is_array($algo)) {
- if (empty($this->key) || !is_string($this->key)) {
- return substr($algo($text, ...array_values($this->parameters)), 0, $this->length);
- }
- // SHA3 HMACs are discussed at https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf#page=30
- $key = str_pad($this->computedKey, $b, chr(0));
- $temp = $this->ipad ^ $key;
- $temp .= $text;
- $temp = substr($algo($temp, ...array_values($this->parameters)), 0, $this->length);
- $output = $this->opad ^ $key;
- $output.= $temp;
- $output = $algo($output, ...array_values($this->parameters));
- return substr($output, 0, $this->length);
- }
- $output = !empty($this->key) || is_string($this->key) ?
- hash_hmac($algo, $text, $this->computedKey, true) :
- hash($algo, $text, true);
- return strlen($output) > $this->length
- ? substr($output, 0, $this->length)
- : $output;
- }
- /**
- * Returns the hash length (in bits)
- *
- * @access public
- * @return int
- */
- public function getLength()
- {
- return $this->length << 3;
- }
- /**
- * Returns the hash length (in bytes)
- *
- * @access public
- * @return int
- */
- public function getLengthInBytes()
- {
- return $this->length;
- }
- /**
- * Returns the block length (in bits)
- *
- * @access public
- * @return int
- */
- public function getBlockLength()
- {
- return $this->blockSize;
- }
- /**
- * Returns the block length (in bytes)
- *
- * @access public
- * @return int
- */
- public function getBlockLengthInBytes()
- {
- return $this->blockSize >> 3;
- }
- /**
- * Pads SHA3 based on the mode
- *
- * @access private
- * @param int $padLength
- * @param int $padType
- * @return string
- */
- private static function sha3_pad($padLength, $padType)
- {
- switch ($padType) {
- //case self::PADDING_KECCAK:
- // $temp = chr(0x06) . str_repeat("\0", $padLength - 1);
- // $temp[$padLength - 1] = $temp[$padLength - 1] | chr(0x80);
- // return $temp
- case self::PADDING_SHAKE:
- $temp = chr(0x1F) . str_repeat("\0", $padLength - 1);
- $temp[$padLength - 1] = $temp[$padLength - 1] | chr(0x80);
- return $temp;
- //case self::PADDING_SHA3:
- default:
- // from https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf#page=36
- return $padLength == 1 ? chr(0x86) : chr(0x06) . str_repeat("\0", $padLength - 2) . chr(0x80);
- }
- }
- /**
- * Pure-PHP 32-bit implementation of SHA3
- *
- * Whereas BigInteger.php's 32-bit engine works on PHP 64-bit this 32-bit implementation
- * of SHA3 will *not* work on PHP 64-bit. This is because this implementation
- * employees bitwise NOTs and bitwise left shifts. And the round constants only work
- * on 32-bit PHP. eg. dechex(-2147483648) returns 80000000 on 32-bit PHP and
- * FFFFFFFF80000000 on 64-bit PHP. Sure, we could do bitwise ANDs but that would slow
- * things down.
- *
- * SHA512 requires BigInteger to simulate 64-bit unsigned integers because SHA2 employees
- * addition whereas SHA3 just employees bitwise operators. PHP64 only supports signed
- * 64-bit integers, which complicates addition, whereas that limitation isn't an issue
- * for SHA3.
- *
- * In https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=919061#page=16 KECCAK[C] is
- * defined as "the KECCAK instance with KECCAK-f[1600] as the underlying permutation and
- * capacity c". This is relevant because, altho the KECCAK standard defines a mode
- * (KECCAK-f[800]) designed for 32-bit machines that mode is incompatible with SHA3
- *
- * @access private
- * @param string $p
- * @param int $c
- * @param int $r
- * @param int $d
- * @param int $padType
- */
- private static function sha3_32($p, $c, $r, $d, $padType)
- {
- $block_size = $r >> 3;
- $padLength = $block_size - (strlen($p) % $block_size);
- $num_ints = $block_size >> 2;
- $p.= static::sha3_pad($padLength, $padType);
- $n = strlen($p) / $r; // number of blocks
- $s = [
- [[0, 0], [0, 0], [0, 0], [0, 0], [0, 0]],
- [[0, 0], [0, 0], [0, 0], [0, 0], [0, 0]],
- [[0, 0], [0, 0], [0, 0], [0, 0], [0, 0]],
- [[0, 0], [0, 0], [0, 0], [0, 0], [0, 0]],
- [[0, 0], [0, 0], [0, 0], [0, 0], [0, 0]]
- ];
- $p = str_split($p, $block_size);
- foreach ($p as $pi) {
- $pi = unpack('V*', $pi);
- $x = $y = 0;
- for ($i = 1; $i <= $num_ints; $i+=2) {
- $s[$x][$y][0]^= $pi[$i + 1];
- $s[$x][$y][1]^= $pi[$i];
- if (++$y == 5) {
- $y = 0;
- $x++;
- }
- }
- static::processSHA3Block32($s);
- }
- $z = '';
- $i = $j = 0;
- while (strlen($z) < $d) {
- $z.= pack('V2', $s[$i][$j][1], $s[$i][$j++][0]);
- if ($j == 5) {
- $j = 0;
- $i++;
- if ($i == 5) {
- $i = 0;
- static::processSHA3Block32($s);
- }
- }
- }
- return $z;
- }
- /**
- * 32-bit block processing method for SHA3
- *
- * @access private
- * @param array $s
- */
- private static function processSHA3Block32(&$s)
- {
- static $rotationOffsets = [
- [ 0, 1, 62, 28, 27],
- [36, 44, 6, 55, 20],
- [ 3, 10, 43, 25, 39],
- [41, 45, 15, 21, 8],
- [18, 2, 61, 56, 14]
- ];
- // the standards give these constants in hexadecimal notation. it's tempting to want to use
- // that same notation, here, however, we can't, because 0x80000000, on PHP32, is a positive
- // float - not the negative int that we need to be in PHP32. so we use -2147483648 instead
- static $roundConstants = [
- [0, 1],
- [0, 32898],
- [-2147483648, 32906],
- [-2147483648, -2147450880],
- [0, 32907],
- [0, -2147483647],
- [-2147483648, -2147450751],
- [-2147483648, 32777],
- [0, 138],
- [0, 136],
- [0, -2147450871],
- [0, -2147483638],
- [0, -2147450741],
- [-2147483648, 139],
- [-2147483648, 32905],
- [-2147483648, 32771],
- [-2147483648, 32770],
- [-2147483648, 128],
- [0, 32778],
- [-2147483648, -2147483638],
- [-2147483648, -2147450751],
- [-2147483648, 32896],
- [0, -2147483647],
- [-2147483648, -2147450872]
- ];
- for ($round = 0; $round < 24; $round++) {
- // theta step
- $parity = $rotated = [];
- for ($i = 0; $i < 5; $i++) {
- $parity[] = [
- $s[0][$i][0] ^ $s[1][$i][0] ^ $s[2][$i][0] ^ $s[3][$i][0] ^ $s[4][$i][0],
- $s[0][$i][1] ^ $s[1][$i][1] ^ $s[2][$i][1] ^ $s[3][$i][1] ^ $s[4][$i][1]
- ];
- $rotated[] = static::rotateLeft32($parity[$i], 1);
- }
- $temp = [
- [$parity[4][0] ^ $rotated[1][0], $parity[4][1] ^ $rotated[1][1]],
- [$parity[0][0] ^ $rotated[2][0], $parity[0][1] ^ $rotated[2][1]],
- [$parity[1][0] ^ $rotated[3][0], $parity[1][1] ^ $rotated[3][1]],
- [$parity[2][0] ^ $rotated[4][0], $parity[2][1] ^ $rotated[4][1]],
- [$parity[3][0] ^ $rotated[0][0], $parity[3][1] ^ $rotated[0][1]]
- ];
- for ($i = 0; $i < 5; $i++) {
- for ($j = 0; $j < 5; $j++) {
- $s[$i][$j][0]^= $temp[$j][0];
- $s[$i][$j][1]^= $temp[$j][1];
- }
- }
- $st = $s;
- // rho and pi steps
- for ($i = 0; $i < 5; $i++) {
- for ($j = 0; $j < 5; $j++) {
- $st[(2 * $i + 3 * $j) % 5][$j] = static::rotateLeft32($s[$j][$i], $rotationOffsets[$j][$i]);
- }
- }
- // chi step
- for ($i = 0; $i < 5; $i++) {
- $s[$i][0] = [
- $st[$i][0][0] ^ (~$st[$i][1][0] & $st[$i][2][0]),
- $st[$i][0][1] ^ (~$st[$i][1][1] & $st[$i][2][1])
- ];
- $s[$i][1] = [
- $st[$i][1][0] ^ (~$st[$i][2][0] & $st[$i][3][0]),
- $st[$i][1][1] ^ (~$st[$i][2][1] & $st[$i][3][1])
- ];
- $s[$i][2] = [
- $st[$i][2][0] ^ (~$st[$i][3][0] & $st[$i][4][0]),
- $st[$i][2][1] ^ (~$st[$i][3][1] & $st[$i][4][1])
- ];
- $s[$i][3] = [
- $st[$i][3][0] ^ (~$st[$i][4][0] & $st[$i][0][0]),
- $st[$i][3][1] ^ (~$st[$i][4][1] & $st[$i][0][1])
- ];
- $s[$i][4] = [
- $st[$i][4][0] ^ (~$st[$i][0][0] & $st[$i][1][0]),
- $st[$i][4][1] ^ (~$st[$i][0][1] & $st[$i][1][1])
- ];
- }
- // iota step
- $s[0][0][0]^= $roundConstants[$round][0];
- $s[0][0][1]^= $roundConstants[$round][1];
- }
- }
- /**
- * Rotate 32-bit int
- *
- * @access private
- * @param array $x
- * @param int $shift
- */
- private static function rotateLeft32($x, $shift)
- {
- if ($shift < 32) {
- list($hi, $lo) = $x;
- } else {
- $shift-= 32;
- list($lo, $hi) = $x;
- }
- return [
- ($hi << $shift) | (($lo >> (32 - $shift)) & (1 << $shift) - 1),
- ($lo << $shift) | (($hi >> (32 - $shift)) & (1 << $shift) - 1)
- ];
- }
- /**
- * Pure-PHP 64-bit implementation of SHA3
- *
- * @access private
- * @param string $p
- * @param int $c
- * @param int $r
- * @param int $d
- * @param int $padType
- */
- private static function sha3_64($p, $c, $r, $d, $padType)
- {
- $block_size = $r >> 3;
- $padLength = $block_size - (strlen($p) % $block_size);
- $num_ints = $block_size >> 2;
- $p.= static::sha3_pad($padLength, $padType);
- $n = strlen($p) / $r; // number of blocks
- $s = [
- [0, 0, 0, 0, 0],
- [0, 0, 0, 0, 0],
- [0, 0, 0, 0, 0],
- [0, 0, 0, 0, 0],
- [0, 0, 0, 0, 0]
- ];
- $p = str_split($p, $block_size);
- foreach ($p as $pi) {
- $pi = unpack('P*', $pi);
- $x = $y = 0;
- foreach ($pi as $subpi) {
- $s[$x][$y++]^= $subpi;
- if ($y == 5) {
- $y = 0;
- $x++;
- }
- }
- static::processSHA3Block64($s);
- }
- $z = '';
- $i = $j = 0;
- while (strlen($z) < $d) {
- $z.= pack('P', $s[$i][$j++]);
- if ($j == 5) {
- $j = 0;
- $i++;
- if ($i == 5) {
- $i = 0;
- static::processSHA3Block64($s);
- }
- }
- }
- return $z;
- }
- /**
- * 64-bit block processing method for SHA3
- *
- * @access private
- * @param array $s
- */
- private static function processSHA3Block64(&$s)
- {
- static $rotationOffsets = [
- [ 0, 1, 62, 28, 27],
- [36, 44, 6, 55, 20],
- [ 3, 10, 43, 25, 39],
- [41, 45, 15, 21, 8],
- [18, 2, 61, 56, 14]
- ];
- static $roundConstants = [
- 1,
- 32898,
- -9223372036854742902,
- -9223372034707259392,
- 32907,
- 2147483649,
- -9223372034707259263,
- -9223372036854743031,
- 138,
- 136,
- 2147516425,
- 2147483658,
- 2147516555,
- -9223372036854775669,
- -9223372036854742903,
- -9223372036854743037,
- -9223372036854743038,
- -9223372036854775680,
- 32778,
- -9223372034707292150,
- -9223372034707259263,
- -9223372036854742912,
- 2147483649,
- -9223372034707259384
- ];
- for ($round = 0; $round < 24; $round++) {
- // theta step
- $parity = [];
- for ($i = 0; $i < 5; $i++) {
- $parity[] = $s[0][$i] ^ $s[1][$i] ^ $s[2][$i] ^ $s[3][$i] ^ $s[4][$i];
- }
- $temp = [
- $parity[4] ^ static::rotateLeft64($parity[1], 1),
- $parity[0] ^ static::rotateLeft64($parity[2], 1),
- $parity[1] ^ static::rotateLeft64($parity[3], 1),
- $parity[2] ^ static::rotateLeft64($parity[4], 1),
- $parity[3] ^ static::rotateLeft64($parity[0], 1)
- ];
- for ($i = 0; $i < 5; $i++) {
- for ($j = 0; $j < 5; $j++) {
- $s[$i][$j]^= $temp[$j];
- }
- }
- $st = $s;
- // rho and pi steps
- for ($i = 0; $i < 5; $i++) {
- for ($j = 0; $j < 5; $j++) {
- $st[(2 * $i + 3 * $j) % 5][$j] = static::rotateLeft64($s[$j][$i], $rotationOffsets[$j][$i]);
- }
- }
- // chi step
- for ($i = 0; $i < 5; $i++) {
- $s[$i] = [
- $st[$i][0] ^ (~$st[$i][1] & $st[$i][2]),
- $st[$i][1] ^ (~$st[$i][2] & $st[$i][3]),
- $st[$i][2] ^ (~$st[$i][3] & $st[$i][4]),
- $st[$i][3] ^ (~$st[$i][4] & $st[$i][0]),
- $st[$i][4] ^ (~$st[$i][0] & $st[$i][1])
- ];
- }
- // iota step
- $s[0][0]^= $roundConstants[$round];
- }
- }
- /**
- * Rotate 64-bit int
- *
- * @access private
- * @param int $x
- * @param int $shift
- */
- private static function rotateLeft64($x, $shift)
- {
- return ($x << $shift) | (($x >> (64 - $shift)) & ((1 << $shift) - 1));
- }
- /**
- * Pure-PHP implementation of SHA512
- *
- * @access private
- * @param string $m
- * @param array $hash
- * @return string
- */
- private static function sha512($m, $hash)
- {
- static $k;
- if (!isset($k)) {
- // Initialize table of round constants
- // (first 64 bits of the fractional parts of the cube roots of the first 80 primes 2..409)
- $k = [
- '428a2f98d728ae22', '7137449123ef65cd', 'b5c0fbcfec4d3b2f', 'e9b5dba58189dbbc',
- '3956c25bf348b538', '59f111f1b605d019', '923f82a4af194f9b', 'ab1c5ed5da6d8118',
- 'd807aa98a3030242', '12835b0145706fbe', '243185be4ee4b28c', '550c7dc3d5ffb4e2',
- '72be5d74f27b896f', '80deb1fe3b1696b1', '9bdc06a725c71235', 'c19bf174cf692694',
- 'e49b69c19ef14ad2', 'efbe4786384f25e3', '0fc19dc68b8cd5b5', '240ca1cc77ac9c65',
- '2de92c6f592b0275', '4a7484aa6ea6e483', '5cb0a9dcbd41fbd4', '76f988da831153b5',
- '983e5152ee66dfab', 'a831c66d2db43210', 'b00327c898fb213f', 'bf597fc7beef0ee4',
- 'c6e00bf33da88fc2', 'd5a79147930aa725', '06ca6351e003826f', '142929670a0e6e70',
- '27b70a8546d22ffc', '2e1b21385c26c926', '4d2c6dfc5ac42aed', '53380d139d95b3df',
- '650a73548baf63de', '766a0abb3c77b2a8', '81c2c92e47edaee6', '92722c851482353b',
- 'a2bfe8a14cf10364', 'a81a664bbc423001', 'c24b8b70d0f89791', 'c76c51a30654be30',
- 'd192e819d6ef5218', 'd69906245565a910', 'f40e35855771202a', '106aa07032bbd1b8',
- '19a4c116b8d2d0c8', '1e376c085141ab53', '2748774cdf8eeb99', '34b0bcb5e19b48a8',
- '391c0cb3c5c95a63', '4ed8aa4ae3418acb', '5b9cca4f7763e373', '682e6ff3d6b2b8a3',
- '748f82ee5defb2fc', '78a5636f43172f60', '84c87814a1f0ab72', '8cc702081a6439ec',
- '90befffa23631e28', 'a4506cebde82bde9', 'bef9a3f7b2c67915', 'c67178f2e372532b',
- 'ca273eceea26619c', 'd186b8c721c0c207', 'eada7dd6cde0eb1e', 'f57d4f7fee6ed178',
- '06f067aa72176fba', '0a637dc5a2c898a6', '113f9804bef90dae', '1b710b35131c471b',
- '28db77f523047d84', '32caab7b40c72493', '3c9ebe0a15c9bebc', '431d67c49c100d4c',
- '4cc5d4becb3e42b6', '597f299cfc657e2a', '5fcb6fab3ad6faec', '6c44198c4a475817'
- ];
- for ($i = 0; $i < 80; $i++) {
- $k[$i] = new BigInteger($k[$i], 16);
- }
- }
- // Pre-processing
- $length = strlen($m);
- // to round to nearest 112 mod 128, we'll add 128 - (length + (128 - 112)) % 128
- $m.= str_repeat(chr(0), 128 - (($length + 16) & 0x7F));
- $m[$length] = chr(0x80);
- // we don't support hashing strings 512MB long
- $m.= pack('N4', 0, 0, 0, $length << 3);
- // Process the message in successive 1024-bit chunks
- $chunks = str_split($m, 128);
- foreach ($chunks as $chunk) {
- $w = [];
- for ($i = 0; $i < 16; $i++) {
- $temp = new BigInteger(Strings::shift($chunk, 8), 256);
- $temp->setPrecision(64);
- $w[] = $temp;
- }
- // Extend the sixteen 32-bit words into eighty 32-bit words
- for ($i = 16; $i < 80; $i++) {
- $temp = [
- $w[$i - 15]->bitwise_rightRotate(1),
- $w[$i - 15]->bitwise_rightRotate(8),
- $w[$i - 15]->bitwise_rightShift(7)
- ];
- $s0 = $temp[0]->bitwise_xor($temp[1]);
- $s0 = $s0->bitwise_xor($temp[2]);
- $temp = [
- $w[$i - 2]->bitwise_rightRotate(19),
- $w[$i - 2]->bitwise_rightRotate(61),
- $w[$i - 2]->bitwise_rightShift(6)
- ];
- $s1 = $temp[0]->bitwise_xor($temp[1]);
- $s1 = $s1->bitwise_xor($temp[2]);
- $w[$i] = clone $w[$i - 16];
- $w[$i] = $w[$i]->add($s0);
- $w[$i] = $w[$i]->add($w[$i - 7]);
- $w[$i] = $w[$i]->add($s1);
- }
- // Initialize hash value for this chunk
- $a = clone $hash[0];
- $b = clone $hash[1];
- $c = clone $hash[2];
- $d = clone $hash[3];
- $e = clone $hash[4];
- $f = clone $hash[5];
- $g = clone $hash[6];
- $h = clone $hash[7];
- // Main loop
- for ($i = 0; $i < 80; $i++) {
- $temp = [
- $a->bitwise_rightRotate(28),
- $a->bitwise_rightRotate(34),
- $a->bitwise_rightRotate(39)
- ];
- $s0 = $temp[0]->bitwise_xor($temp[1]);
- $s0 = $s0->bitwise_xor($temp[2]);
- $temp = [
- $a->bitwise_and($b),
- $a->bitwise_and($c),
- $b->bitwise_and($c)
- ];
- $maj = $temp[0]->bitwise_xor($temp[1]);
- $maj = $maj->bitwise_xor($temp[2]);
- $t2 = $s0->add($maj);
- $temp = [
- $e->bitwise_rightRotate(14),
- $e->bitwise_rightRotate(18),
- $e->bitwise_rightRotate(41)
- ];
- $s1 = $temp[0]->bitwise_xor($temp[1]);
- $s1 = $s1->bitwise_xor($temp[2]);
- $temp = [
- $e->bitwise_and($f),
- $g->bitwise_and($e->bitwise_not())
- ];
- $ch = $temp[0]->bitwise_xor($temp[1]);
- $t1 = $h->add($s1);
- $t1 = $t1->add($ch);
- $t1 = $t1->add($k[$i]);
- $t1 = $t1->add($w[$i]);
- $h = clone $g;
- $g = clone $f;
- $f = clone $e;
- $e = $d->add($t1);
- $d = clone $c;
- $c = clone $b;
- $b = clone $a;
- $a = $t1->add($t2);
- }
- // Add this chunk's hash to result so far
- $hash = [
- $hash[0]->add($a),
- $hash[1]->add($b),
- $hash[2]->add($c),
- $hash[3]->add($d),
- $hash[4]->add($e),
- $hash[5]->add($f),
- $hash[6]->add($g),
- $hash[7]->add($h)
- ];
- }
- // Produce the final hash value (big-endian)
- // (\phpseclib3\Crypt\Hash::hash() trims the output for hashes but not for HMACs. as such, we trim the output here)
- $temp = $hash[0]->toBytes() . $hash[1]->toBytes() . $hash[2]->toBytes() . $hash[3]->toBytes() .
- $hash[4]->toBytes() . $hash[5]->toBytes() . $hash[6]->toBytes() . $hash[7]->toBytes();
- return $temp;
- }
- /**
- * __toString() magic method
- */
- public function __toString()
- {
- return $this->getHash();
- }
- }