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/ rc4.js
Last active
September 8, 2017 13:12
— forked from farhadi/rc4.js
RC4 encryption in javascript and php
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| /** | |
| * RC4 symmetric cipher encryption/decryption | |
| * @see https://gist.github.com/farhadi/2185197 and https://en.wikipedia.org/wiki/RC4 | |
| * @license Public Domain | |
| * | |
| * @param key - secret key for encryption/decryption | |
| * @param str - string to be encrypted/decrypted | |
| * @return string | |
| */ | |
| function rc4(key, str){ |
patsuckow
/ gist:34202b4632376610ef0e
Last active
September 1, 2017 12:57
— forked from tot-ra/gist:4251018
CRC calculations - Циклический избыточный код (англ. Cyclic redundancy check, CRC) — алгоритм нахождения контрольной суммы, предназначенный для проверки целостности данных.
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| function crc16($string, $crc = 0) { | |
| for($x = 0; $x < strlen($string); $x++) { | |
| $crc = $crc ^ ord($string[$x]); | |
| echo $crc . '<br />'; | |
| for($y = 0; $y < 8; $y++) { | |
| if(($crc & 0x0001) == 0x0001) { | |
| $crc = (($crc >> 1) ^ 0x10589); |