File: /var/www/vhosts/aceitunaslosada.com/web/wp-content/plugins/redsysoficial/apiRedsys/sha256.php
<?php
/*************************************************************
*
* SHA256 static class for PHP4
* implemented by feyd _at_ devnetwork .dot. net
* specification from http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
*
* (c) Copyright 2005 Developer's Network. All rights reserved.
* This is licensed under the Lesser General Public License (LGPL)
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Thanks to CertainKey Inc. for providing some example outputs in Javascript
*
*----- Version 1.0.1 ----------------------------------------------------------
*
* Syntax:
* string SHA256::hash( string message[, string format ])
*
* Description:
* SHA256::hash() is a static function that must be called with `message`
* and optionally `format`. Possible values for `format` are:
* 'bin' binary string output
* 'hex' default; hexidecimal string output (lower case)
*
* Failures return FALSE.
*
* Usage:
* $hash = SHA256::hash('string to hash');
*
************************************************************** */
// hashing class state and storage object. Abstract base class only.
class hashData{
// final hash
var $hash = null;
}
// hashing class. Abstract base class only.
class hash{
// The base modes are:
// 'bin' - binary output (most compact)
// 'bit' - bit output (largest)
// 'oct' - octal output (medium-large)
// 'hex' - hexidecimal (default, medium)
// perform a hash on a string
function hash($str, $mode = 'hex'){
trigger_error('hash::hash() NOT IMPLEMENTED', E_USER_WARNING);
return false;
}
// chop the resultant hash into $length byte chunks
function hashChunk($str, $length, $mode = 'hex'){
trigger_error('hash::hashChunk() NOT IMPLEMENTED', E_USER_WARNING);
return false;
}
// perform a hash on a file
function hashFile($filename, $mode = 'hex'){
trigger_error('hash::hashFile() NOT IMPLEMENTED', E_USER_WARNING);
return false;
}
// chop the resultant hash into $length byte chunks
function hashChunkFile($filename, $length, $mode = 'hex'){
trigger_error('hash::hashChunkFile() NOT IMPLEMENTED', E_USER_WARNING);
return false;
}
}
// ------------
class SHA256Data extends hashData{
// buffer
var $buf = array();
// padded data
var $chunks = null;
function SHA256Data($str){
$M = strlen($str); // number of bytes
$L1 = ($M >> 28) & 0x0000000F; // top order bits
$L2 = $M << 3; // number of bits
$l = pack('N*', $L1, $L2);
// 64 = 64 bits needed for the size mark. 1 = the 1 bit added to the
// end. 511 = 511 bits to get the number to be at least large enough
// to require one block. 512 is the block size.
$k = $L2 + 64 + 1 + 511;
$k -= $k % 512 + $L2 + 64 + 1;
$k >>= 3; // convert to byte count
$str .= chr(0x80) . str_repeat(chr(0), $k) . $l;
assert('strlen($str) % 64 == 0');
// break the binary string into 512-bit blocks
preg_match_all( '#.{64}#', $str, $this->chunks );
$this->chunks = $this->chunks[0];
// H(0)
$this->hash = array(
1779033703, -1150833019,
1013904242, -1521486534,
1359893119, -1694144372,
528734635, 1541459225,
);
}
}
// static class. Access via SHA256::hash()
class SHA256 extends hash{
function hash($str, $mode = 'hex'){
static $modes = array( 'hex', 'bin', 'bit' );
$ret = false;
if(!in_array(strtolower($mode), $modes)){
trigger_error('mode specified is unrecognized: ' . $mode, E_USER_WARNING);
}
else{
$data =& new SHA256Data($str);
SHA256::compute($data);
$func = array('SHA256', 'hash' . $mode);
if(is_callable($func)){
$func = 'hash' . $mode;
$ret = SHA256::$func($data);
}
else{
trigger_error('SHA256::hash' . $mode . '() NOT IMPLEMENTED.', E_USER_WARNING);
}
}
return $ret;
}
// ------------
// begin internal functions
// 32-bit summation
function sum(){
$T = 0;
for($x = 0, $y = func_num_args(); $x < $y; $x++){
// argument
$a = func_get_arg($x);
// carry storage
$c = 0;
for($i = 0; $i < 32; $i++){
// sum of the bits at $i
$j = (($T >> $i) & 1) + (($a >> $i) & 1) + $c;
// carry of the bits at $i
$c = ($j >> 1) & 1;
// strip the carry
$j &= 1;
// clear the bit
$T &= ~(1 << $i);
// set the bit
$T |= $j << $i;
}
}
return $T;
}
// compute the hash
function compute(&$hashData){
static $vars = 'abcdefgh';
static $K = null;
if($K === null){
/*
$K = array(
(int)0x428A2F98, (int)0x71374491, (int)0xB5C0FBCF, (int)0xE9B5DBA5,
(int)0x3956C25B, (int)0x59F111F1, (int)0x923F82A4, (int)0xAB1C5ED5,
(int)0xD807AA98, (int)0x12835B01, (int)0x243185BE, (int)0x550C7DC3,
(int)0x72BE5D74, (int)0x80DEB1FE, (int)0x9BDC06A7, (int)0xC19BF174,
(int)0xE49B69C1, (int)0xEFBE4786, (int)0x0FC19DC6, (int)0x240CA1CC,
(int)0x2DE92C6F, (int)0x4A7484AA, (int)0x5CB0A9DC, (int)0x76F988DA,
(int)0x983E5152, (int)0xA831C66D, (int)0xB00327C8, (int)0xBF597FC7,
(int)0xC6E00BF3, (int)0xD5A79147, (int)0x06CA6351, (int)0x14292967,
(int)0x27B70A85, (int)0x2E1B2138, (int)0x4D2C6DFC, (int)0x53380D13,
(int)0x650A7354, (int)0x766A0ABB, (int)0x81C2C92E, (int)0x92722C85,
(int)0xA2BFE8A1, (int)0xA81A664B, (int)0xC24B8B70, (int)0xC76C51A3,
(int)0xD192E819, (int)0xD6990624, (int)0xF40E3585, (int)0x106AA070,
(int)0x19A4C116, (int)0x1E376C08, (int)0x2748774C, (int)0x34B0BCB5,
(int)0x391C0CB3, (int)0x4ED8AA4A, (int)0x5B9CCA4F, (int)0x682E6FF3,
(int)0x748F82EE, (int)0x78A5636F, (int)0x84C87814, (int)0x8CC70208,
(int)0x90BEFFFA, (int)0xA4506CEB, (int)0xBEF9A3F7, (int)0xC67178F2
);
*/
$K = array(
1116352408, 1899447441, -1245643825, -373957723,
961987163, 1508970993, -1841331548, -1424204075,
-670586216, 310598401, 607225278, 1426881987,
1925078388, -2132889090, -1680079193, -1046744716,
-459576895, -272742522, 264347078, 604807628,
770255983, 1249150122, 1555081692, 1996064986,
-1740746414, -1473132947, -1341970488, -1084653625,
-958395405, -710438585, 113926993, 338241895,
666307205, 773529912, 1294757372, 1396182291,
1695183700, 1986661051, -2117940946, -1838011259,
-1564481375, -1474664885, -1035236496, -949202525,
-778901479, -694614492, -200395387, 275423344,
430227734, 506948616, 659060556, 883997877,
958139571, 1322822218, 1537002063, 1747873779,
1955562222, 2024104815, -2067236844, -1933114872,
-1866530822, -1538233109, -1090935817, -965641998,
);
}
$W = array();
for($i = 0, $numChunks = sizeof($hashData->chunks); $i < $numChunks; $i++){
// initialize the registers
for($j = 0; $j < 8; $j++)
${$vars{$j}} = $hashData->hash[$j];
// the SHA-256 compression function
for($j = 0; $j < 64; $j++){
if($j < 16){
$T1 = ord($hashData->chunks[$i]{$j*4 }) & 0xFF; $T1 <<= 8;
$T1 |= ord($hashData->chunks[$i]{$j*4+1}) & 0xFF; $T1 <<= 8;
$T1 |= ord($hashData->chunks[$i]{$j*4+2}) & 0xFF; $T1 <<= 8;
$T1 |= ord($hashData->chunks[$i]{$j*4+3}) & 0xFF;
$W[$j] = $T1;
}
else{
$W[$j] = SHA256::sum(((($W[$j-2] >> 17) & 0x00007FFF) | ($W[$j-2] << 15)) ^ ((($W[$j-2] >> 19) & 0x00001FFF) | ($W[$j-2] << 13)) ^ (($W[$j-2] >> 10) & 0x003FFFFF), $W[$j-7], ((($W[$j-15] >> 7) & 0x01FFFFFF) | ($W[$j-15] << 25)) ^ ((($W[$j-15] >> 18) & 0x00003FFF) | ($W[$j-15] << 14)) ^ (($W[$j-15] >> 3) & 0x1FFFFFFF), $W[$j-16]);
}
$T1 = SHA256::sum($h, ((($e >> 6) & 0x03FFFFFF) | ($e << 26)) ^ ((($e >> 11) & 0x001FFFFF) | ($e << 21)) ^ ((($e >> 25) & 0x0000007F) | ($e << 7)), ($e & $f) ^ (~$e & $g), $K[$j], $W[$j]);
$T2 = SHA256::sum(((($a >> 2) & 0x3FFFFFFF) | ($a << 30)) ^ ((($a >> 13) & 0x0007FFFF) | ($a << 19)) ^ ((($a >> 22) & 0x000003FF) | ($a << 10)), ($a & $b) ^ ($a & $c) ^ ($b & $c));
$h = $g;
$g = $f;
$f = $e;
$e = SHA256::sum($d, $T1);
$d = $c;
$c = $b;
$b = $a;
$a = SHA256::sum($T1, $T2);
}
// compute the next hash set
for($j = 0; $j < 8; $j++)
$hashData->hash[$j] = SHA256::sum(${$vars{$j}}, $hashData->hash[$j]);
}
}
// set up the display of the hash in hex.
function hashHex(&$hashData){
$str = '';
reset($hashData->hash);
do{
$str .= sprintf('%08x', current($hashData->hash));
}
while(next($hashData->hash));
return $str;
}
// set up the output of the hash in binary
function hashBin(&$hashData){
$str = '';
reset($hashData->hash);
do{
$str .= pack('N', current($hashData->hash));
}
while(next($hashData->hash));
return $str;
}
}
?>