Sindbad~EG File Manager
<?php
/*
* @version $Id: HEADER 15930 2011-10-30 15:47:55Z tsmr $
-------------------------------------------------------------------------
accounts plugin for GLPI
Copyright (C) 2009-2022 by the accounts Development Team.
https://github.com/InfotelGLPI/accounts
-------------------------------------------------------------------------
LICENSE
This file is part of accounts.
accounts is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
accounts 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with accounts. If not, see <http://www.gnu.org/licenses/>.
--------------------------------------------------------------------------
*/
// ----------------------------------------------------------------------
// Original Author of file: GRISARD Jean Marc & CAILLAUD Xavier
// Purpose of file:
// ----------------------------------------------------------------------
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* AES implementation in PHP (c) Chris Veness 2005-2009. Right of free use is granted for all */
/* commercial or non-commercial use under LGPL licence. No warranty of any form is offered. */
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/**
* AES Cipher function: encrypt 'input' with Rijndael algorithm
*
* @param message $input
* @param key $w
* @return ciphertext as byte-array (16 bytes)
* @internal param message $input as byte-array (16 bytes)
* @internal param key $w schedule as 2D byte-array (Nr+1 x Nb bytes) -
* generated from the cipher key by KeyExpansion()
*/
function plugin_accounts_Cipher($input, $w) {
// main Cipher function
$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
$Nr = count($w) / $Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys
$state = []; // initialise 4xNb byte-array 'state' with input
for ($i = 0; $i < 4 * $Nb; $i++) {
$state[$i % 4][floor($i / 4)] = $input[$i];
}
$state = plugin_accounts_AddRoundKey($state, $w, 0, $Nb);
for ($round = 1; $round < $Nr; $round++) { // apply Nr rounds
$state = plugin_accounts_SubBytes($state, $Nb);
$state = plugin_accounts_ShiftRows($state, $Nb);
$state = plugin_accounts_MixColumns($state, $Nb);
$state = plugin_accounts_AddRoundKey($state, $w, $round, $Nb);
}
$state = plugin_accounts_SubBytes($state, $Nb);
$state = plugin_accounts_ShiftRows($state, $Nb);
$state = plugin_accounts_AddRoundKey($state, $w, $Nr, $Nb);
$output = [4 * $Nb]; // convert state to 1-d array before returning
for ($i = 0; $i < 4 * $Nb; $i++) {
$output[$i] = $state[$i % 4][floor($i / 4)];
}
return $output;
}
/**
* @param $state
* @param $w
* @param $rnd
* @param $Nb
* @return mixed
*/
function plugin_accounts_AddRoundKey($state, $w, $rnd, $Nb) {
// xor Round Key into state S
for ($r = 0; $r < 4; $r++) {
for ($c = 0; $c < $Nb; $c++) {
$state[$r][$c] ^= $w[$rnd * 4 + $c][$r];
}
}
return $state;
}
/**
* @param $s
* @param $Nb
* @return mixed
*/
function plugin_accounts_SubBytes($s, $Nb) {
// apply SBox to state S
global $Sbox; // PHP needs explicit declaration to access global variables!
for ($r = 0; $r < 4; $r++) {
for ($c = 0; $c < $Nb; $c++) {
$s[$r][$c] = $Sbox[$s[$r][$c]];
}
}
return $s;
}
/**
* @param $s
* @param $Nb
* @return mixed
*/
function plugin_accounts_ShiftRows($s, $Nb) {
// shift row r of state S left by r bytes
$t = [4];
for ($r = 1; $r < 4; $r++) {
for ($c = 0; $c < 4; $c++) {
$t[$c] = $s[$r][($c + $r) % $Nb]; // shift into temp copy
}
for ($c = 0; $c < 4; $c++) {
$s[$r][$c] = $t[$c]; // and copy back
}
} // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES):
return $s; // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf
}
/**
* @param $s
* @param $Nb
* @return mixed
*/
function plugin_accounts_MixColumns($s, $Nb) {
// combine bytes of each col of state S
for ($c = 0; $c < 4; $c++) {
$a = [4]; // 'a' is a copy of the current column from 's'
$b = [4]; // 'b'
for ($i = 0; $i < 4; $i++) {
$a[$i] = $s[$i][$c];
$b[$i] = $s[$i][$c] & 0x80 ? $s[$i][$c] << 1 ^ 0x011b : $s[$i][$c] << 1;
}
// a[n] ^ b[n]
$s[0][$c] = $b[0] ^ $a[1] ^ $b[1] ^ $a[2] ^ $a[3]; // 2*a0 + 3*a1 + a2 + a3
$s[1][$c] = $a[0] ^ $b[1] ^ $a[2] ^ $b[2] ^ $a[3]; // a0 * 2*a1 + 3*a2 + a3
$s[2][$c] = $a[0] ^ $a[1] ^ $b[2] ^ $a[3] ^ $b[3]; // a0 + a1 + 2*a2 + 3*a3
$s[3][$c] = $a[0] ^ $b[0] ^ $a[1] ^ $a[2] ^ $b[3]; // 3*a0 + a1 + a2 + 2*a3
}
return $s;
}
/**
* Key expansion for Rijndael Cipher(): performs key expansion on cipher key
* to generate a key schedule
*
* @param cipher $key
* @return key schedule as 2D byte-array (Nr+1 x Nb bytes)
* @internal param cipher $key key byte-array (16 bytes)
*/
function plugin_accounts_KeyExpansion($key) {
// generate Key Schedule from Cipher Key
global $Rcon; // PHP needs explicit declaration to access global variables!
$Nb = 4; // block size (in words): no of columns in state (fixed at 4 for AES)
$Nk = count($key) / 4; // key length (in words): 4/6/8 for 128/192/256-bit keys
$Nr = $Nk + 6; // no of rounds: 10/12/14 for 128/192/256-bit keys
$w = [];
$temp = [];
for ($i = 0; $i < $Nk; $i++) {
$r = [$key[4 * $i], $key[4 * $i + 1], $key[4 * $i + 2], $key[4 * $i + 3]];
$w[$i] = $r;
}
for ($i = $Nk; $i < ($Nb * ($Nr + 1)); $i++) {
$w[$i] = [];
for ($t = 0; $t < 4; $t++) {
$temp[$t] = $w[$i - 1][$t];
}
if ($i % $Nk == 0) {
$temp = plugin_accounts_SubWord(plugin_accounts_RotWord($temp));
for ($t = 0; $t < 4; $t++) {
$temp[$t] ^= $Rcon[$i / $Nk][$t];
}
} else if ($Nk > 6 && $i % $Nk == 4) {
$temp = plugin_accounts_SubWord($temp);
}
for ($t = 0; $t < 4; $t++) {
$w[$i][$t] = $w[$i - $Nk][$t] ^ $temp[$t];
}
}
return $w;
}
/**
* @param $w
* @return mixed
*/
function plugin_accounts_SubWord($w) {
// apply SBox to 4-byte word w
global $Sbox; // PHP needs explicit declaration to access global variables!
for ($i = 0; $i < 4; $i++) {
$w[$i] = $Sbox[$w[$i]];
}
return $w;
}
/**
* @param $w
* @return mixed
*/
function plugin_accounts_RotWord($w) {
// rotate 4-byte word w left by one byte
$tmp = $w[0];
for ($i = 0; $i < 3; $i++) {
$w[$i] = $w[$i + 1];
}
$w[3] = $tmp;
return $w;
}
// Sbox is pre-computed multiplicative inverse in GF(2^8) used in SubBytes and KeyExpansion
$Sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
// Rcon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)]
$Rcon = [[0x00, 0x00, 0x00, 0x00],
[0x01, 0x00, 0x00, 0x00],
[0x02, 0x00, 0x00, 0x00],
[0x04, 0x00, 0x00, 0x00],
[0x08, 0x00, 0x00, 0x00],
[0x10, 0x00, 0x00, 0x00],
[0x20, 0x00, 0x00, 0x00],
[0x40, 0x00, 0x00, 0x00],
[0x80, 0x00, 0x00, 0x00],
[0x1b, 0x00, 0x00, 0x00],
[0x36, 0x00, 0x00, 0x00]];
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/**
* Encrypt a text using AES encryption in Counter mode of operation
* - see http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
*
* Unicode multi-byte character safe
*
* @param source $plaintext
* @param the $password
* @param number $nBits
* @return encrypted text
* @internal param source $plaintext text to be encrypted
* @internal param the $password password to use to generate a key
* @internal param number $nBits of bits to be used in the key (128, 192, or 256)
*/
function plugin_accounts_AESEncryptCtr($plaintext, $password, $nBits) {
$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return ''; // standard allows 128/192/256 bit keys
}
// note PHP (5) gives us plaintext and password in UTF8 encoding!
// use AES itself to encrypt password to get cipher key (using plain password as source for
// key expansion) - gives us well encrypted key
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = [];
for ($i = 0; $i < $nBytes; $i++) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = plugin_accounts_Cipher($pwBytes, plugin_accounts_KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
// initialise counter block (NIST SP800-38A): millisecond time-stamp for nonce in
// 1st 8 bytes, block counter in 2nd 8 bytes
$counterBlock = [];
$nonce = floor(microtime(true) * 1000); // timestamp: milliseconds since 1-Jan-1970
$nonceSec = floor($nonce / 1000);
$nonceMs = $nonce % 1000;
// encode nonce with seconds in 1st 4 bytes, and (repeated) ms part filling 2nd 4 bytes
for ($i = 0; $i < 4; $i++) {
$counterBlock[$i] = plugin_accounts_urs($nonceSec, $i * 8) & 0xff;
}
for ($i = 0; $i < 4; $i++) {
$counterBlock[$i + 4] = $nonceMs & 0xff;
}
// and convert it to a string to go on the front of the ciphertext
$ctrTxt = '';
for ($i = 0; $i < 8; $i++) {
$ctrTxt .= chr($counterBlock[$i]);
}
// generate key schedule - an expansion of the key into distinct Key Rounds for each round
$keySchedule = plugin_accounts_KeyExpansion($key);
$blockCount = ceil(strlen($plaintext) / $blockSize);
$ciphertxt = []; // ciphertext as array of strings
for ($b = 0; $b < $blockCount; $b++) {
// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
// done in two stages for 32-bit ops: using two words allows us to go past 2^32 blocks (68GB)
for ($c = 0; $c < 4; $c++) {
$counterBlock[15 - $c] = plugin_accounts_urs($b, $c * 8) & 0xff;
}
for ($c = 0; $c < 4; $c++) {
$counterBlock[15 - $c - 4] = plugin_accounts_urs($b / 4294967296, $c * 8);
}
$cipherCntr = plugin_accounts_Cipher($counterBlock, $keySchedule); // -- encrypt counter block --
// block size is reduced on final block
$blockLength = $b < $blockCount - 1 ? $blockSize : (strlen($plaintext) - 1) % $blockSize + 1;
$cipherByte = [];
for ($i = 0; $i < $blockLength; $i++) { // -- xor plaintext with ciphered counter byte-by-byte --
$cipherByte[$i] = $cipherCntr[$i] ^ ord(substr($plaintext, $b * $blockSize + $i, 1));
$cipherByte[$i] = chr($cipherByte[$i]);
}
$ciphertxt[$b] = implode('', $cipherByte); // escape troublesome characters in ciphertext
}
// implode is more efficient than repeated string concatenation
$ciphertext = $ctrTxt . implode('', $ciphertxt);
$ciphertext = base64_encode($ciphertext);
return $ciphertext;
}
/**
* Decrypt a text encrypted by AES in counter mode of operation
*
* @param source $ciphertext
* @param the $password
* @param number $nBits
* @return decrypted text
* @internal param source $ciphertext text to be decrypted
* @internal param the $password password to use to generate a key
* @internal param number $nBits of bits to be used in the key (128, 192, or 256)
*/
function plugin_accounts_AESDecryptCtr($ciphertext, $password, $nBits) {
$blockSize = 16; // block size fixed at 16 bytes / 128 bits (Nb=4) for AES
if (!($nBits == 128 || $nBits == 192 || $nBits == 256)) {
return ''; // standard allows 128/192/256 bit keys
}
$ciphertext = base64_decode($ciphertext);
// use AES to encrypt password (mirroring encrypt routine)
$nBytes = $nBits / 8; // no bytes in key
$pwBytes = [];
for ($i = 0; $i < $nBytes; $i++) {
$pwBytes[$i] = ord(substr($password, $i, 1)) & 0xff;
}
$key = plugin_accounts_Cipher($pwBytes, plugin_accounts_KeyExpansion($pwBytes));
$key = array_merge($key, array_slice($key, 0, $nBytes - 16)); // expand key to 16/24/32 bytes long
// recover nonce from 1st element of ciphertext
$counterBlock = [];
$ctrTxt = substr($ciphertext, 0, 8);
for ($i = 0; $i < 8; $i++) {
$counterBlock[$i] = ord(substr($ctrTxt, $i, 1));
}
// generate key schedule
$keySchedule = plugin_accounts_KeyExpansion($key);
// separate ciphertext into blocks (skipping past initial 8 bytes)
$nBlocks = ceil((strlen($ciphertext) - 8) / $blockSize);
$ct = [];
for ($b = 0; $b < $nBlocks; $b++) {
$ct[$b] = substr($ciphertext, 8 + $b * $blockSize, 16);
}
$ciphertext = $ct; // ciphertext is now array of block-length strings
// plaintext will get generated block-by-block into array of block-length strings
$plaintxt = [];
for ($b = 0; $b < $nBlocks; $b++) {
// set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes)
for ($c = 0; $c < 4; $c++) {
$counterBlock[15 - $c] = plugin_accounts_urs($b, $c * 8) & 0xff;
}
for ($c = 0; $c < 4; $c++) {
$counterBlock[15 - $c - 4] = plugin_accounts_urs(($b + 1) / 4294967296 - 1, $c * 8) & 0xff;
}
$cipherCntr = plugin_accounts_Cipher($counterBlock, $keySchedule); // encrypt counter block
$plaintxtByte = [];
for ($i = 0; $i < strlen($ciphertext[$b]); $i++) {
// -- xor plaintext with ciphered counter byte-by-byte --
$plaintxtByte[$i] = $cipherCntr[$i] ^ ord(substr($ciphertext[$b], $i, 1));
$plaintxtByte[$i] = chr($plaintxtByte[$i]);
}
$plaintxt[$b] = implode('', $plaintxtByte);
}
// join array of blocks into single plaintext string
$plaintext = implode('', $plaintxt);
return $plaintext;
}
/*
* Unsigned right shift function, since PHP has neither >>> operator nor unsigned ints
*
* @param a number to be shifted (32-bit integer)
* @param b number of bits to shift a to the right (0..31)
* @return a right-shifted and zero-filled by b bits
*/
// function urs($a, $b) {
// $a &= 0xffffffff; $b &= 0x1f; // (bounds check)
// if ($a&0x80000000 && $b>0) { // if left-most bit set
// $a = ($a>>1) & 0x7fffffff; // right-shift one bit & clear left-most bit
// $a = $a >> ($b-1); // remaining right-shifts
// } else { // otherwise
// $a = ($a>>$b); // use normal right-shift
// }
// return $a;
// }
/**
* @param $a
* @param $b
* @return number
*/
function plugin_accounts_urs($a, $b) {
return bindec("0" . substr(decbin($a), $b));
}
Sindbad File Manager Version 1.0, Coded By Sindbad EG ~ The Terrorists