@ 2015-04-03T14:23:05Z <?php
final class Crypt {
private static $range = 62;
private static $goldenPrimes36 = array(
/*
* Key..: next prime greater than 36 ^ n / 1.618033988749894848
* Value: modular multiplicative inverse
*/
'1' => '1',
'23' => '11',
'809' => '809',
'28837' => '29485',
'1038073' => '179017',
'37370153' => '47534873',
'1345325473' => '264202849',
'48431716939' => '19727015779',
'1743541808839' => '1532265214711',
'62767505117101' => '67935388019749',
'3656158440062987' => '3323780400057251',
'131621703842267239' => '14056686818106199'
);
private static $goldenPrimes62 = array(
/*
* Key..: next prime greater than 62 ^ n / 1.618033988749894848
* Value: modular multiplicative inverse
*/
'1' => '1',
'41' => '59',
'2377' => '1677',
'147299' => '187507',
'9132313' => '5952585',
'566201239' => '643566407',
'35104476161' => '22071637057',
'2176477521929' => '294289236153',
'134941606358731' => '88879354792675',
'8366379594239857' => '7275288500431249',
'518715534842869223' => '280042546585394647'
);
private static $chars62 = array(
// Ascii : 0-9
0 => 48, 1 => 49, 2 => 50, 3 => 51, 4 => 52, 5 => 53, 6 => 54, 7 => 55, 8 => 56, 9 => 57,
// Ascii : A-Z
10 => 65, 11 => 66, 12 => 67, 13 => 68, 14 => 69, 15 => 70, 16 => 71, 17 => 72, 18 => 73, 19 => 74, 20 => 75,
21 => 76, 22 => 77, 23 => 78, 24 => 79, 25 => 80, 26 => 81, 27 => 82, 28 => 83, 29 => 84, 30 => 85, 31 => 86,
32 => 87, 33 => 88, 34 => 89, 35 => 90,
// Ascii : a-z
36 => 97, 37 => 98, 38 => 99, 39 => 100, 40 => 101, 41 => 102, 42 => 103, 43 => 104, 44 => 105, 45 => 106, 46 => 107,
47 => 108, 48 => 109, 49 => 110, 50 => 111, 51 => 112, 52 => 113, 53 => 114, 54 => 115, 55 => 116, 56 => 117, 57 => 118,
58 => 119, 59 => 120, 60 => 121, 61 => 122
);
/**
* Calculates the hash 36 or 62 based range.
* @param integer $int
* @return string
*/
private static function baseX($int) {
$key = '';
while (bccomp($int, 0) > 0) {
$mod = bcmod($int, self::$range);
$key .= chr(self::$chars62[$mod]);
$int = bcdiv($int, self::$range, 0);
}
return strrev($key);
}
/**
* Inverse calculation for hashes 36 or 62 based range.
* @param string $key
* @return integer
*/
private static function unbaseX($key) {
$int = 0;
foreach (str_split(strrev($key)) as $i => $char) {
$dec = array_search(ord($char), self::$chars62);
$int = bcadd(bcmul($dec, bcpow(self::$range, $i)), $int);
}
return $int;
}
/**
* Generates the hash 62 based chars(a-z, A-Z, 0-9) to a given int number.
* Important:
* – the biggest cryptable integer with hash length = 5 is 916 132 831.
* – the biggest cryptable integer with hash length = 6 is 56 800 235 583. It seems to be enough, no?
*
* @param integer $num
* @param integer $len
* @return string
*/
public static function hash($num, $len = 5) {
$ceil = bcpow(self::$range, $len);
$primes = array_keys(self::$range === 36 ? self::$goldenPrimes36 : self::$goldenPrimes62);
$prime = $primes[$len];
$dec = bcmod(bcmul($num, $prime, 0),$ceil);
$hash = self::baseX($dec);
return str_pad($hash, $len, '0', STR_PAD_LEFT);
}
/**
* Generates the hash 36 based chars(A-Z, 0-9) to a given int number.
*
* Important:
*
* – the biggest cryptable integer with hash length = 5 is 60 466 175.
*
* – the biggest cryptable integer with hash length = 6 is 2 176 782 335.
*/
public static function hash36($num, $len = 5) {
self::$range = 36;
return self::hash($num, $len);
}
/**
* Converts a previous generated hash to its original integer.
* @param string $hash
* @return integer
*/
public static function unhash($hash) {
$len = strlen($hash);
$ceil = bcpow(self::$range, $len);
$mmiprimes = array_values(self::$range === 36 ? self::$goldenPrimes36 : self::$goldenPrimes62);
$mmi = $mmiprimes[$len];
$num = self::unbaseX($hash);
$dec = bcmod(bcmul($num, $mmi), $ceil);
return $dec;
}
}
$hashParams = array(
'plopi' => 'gato',
'token' => 'lol'
);
var_dump($hashParams);
$hashParams = 'poney';
$strEncoded = Crypt::hash(json_encode($hashParams));
echo "\n encoded\t:" . json_encode($hashParams). "\n";
echo "\n encoded\t:" . $strEncoded. "\n";
echo "\n decode encoded\t:" . Crypt::unhash($strEncoded)."\n";
var_dump(json_decode(Crypt::unhash($strEncoded), true));
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Output for 8.0.2 - 8.0.12 , 8.0.14 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.6 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
Fatal error: Uncaught ValueError: bcmul(): Argument #1 ($num1) is not well-formed in /in/8fqRV:102
Stack trace:
#0 /in/8fqRV(102): bcmul('"poney"', '566201239', 0)
#1 /in/8fqRV(147): Crypt::hash('"poney"')
#2 {main}
thrown in /in/8fqRV on line 102
Process exited with code 255 . Output for 7.3.32 - 7.3.33 , 7.4.33 , 8.0.13 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
Fatal error: Uncaught Error: Call to undefined function bcpow() in /in/8fqRV:99
Stack trace:
#0 /in/8fqRV(147): Crypt::hash('"poney"')
#1 {main}
thrown in /in/8fqRV on line 99
Process exited with code 255 . Output for 7.4.0 - 7.4.32 , 8.0.0 - 8.0.1 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
Warning: bcmul(): bcmath function argument is not well-formed in /in/8fqRV on line 102
encoded :"poney"
encoded :00000
decode encoded :0
int(0)
Output for 5.2.1 - 5.2.17 , 5.3.0 - 5.3.29 , 5.5.17 , 5.6.0 - 5.6.38 , 7.0.0 - 7.0.32 , 7.1.0 - 7.1.33 , 7.2.0 - 7.2.33 , 7.3.0 - 7.3.31 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
encoded :"poney"
encoded :00000
decode encoded :0
int(0)
Output for 5.4.0 - 5.4.45 , 5.5.0 - 5.5.16 , 5.5.18 - 5.5.38 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
Fatal error: Call to undefined function bcpow() in /in/8fqRV on line 99
Process exited with code 255 . Output for 5.2.0 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
encoded :"poney"
encoded :00000
decode encoded :0
NULL
Output for 5.0.0 - 5.0.5 , 5.1.0 - 5.1.6 array(2) {
["plopi"]=>
string(4) "gato"
["token"]=>
string(3) "lol"
}
Fatal error: Call to undefined function json_encode() in /in/8fqRV on line 147
Process exited with code 255 . Output for 4.4.2 - 4.4.9 Parse error: syntax error, unexpected T_CLASS in /in/8fqRV on line 5
Process exited with code 255 . Output for 4.3.0 - 4.3.1 , 4.3.5 - 4.3.11 , 4.4.0 - 4.4.1 Parse error: parse error, unexpected T_CLASS in /in/8fqRV on line 5
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error in /in/8fqRV on line 5
Process exited with code 255 . preferences:dark mode live preview
339.94 ms | 401 KiB | 448 Q