testing

PhabricatorHash.php
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			<?php

			final class PhabricatorHash {


			/**
			* Digest a string for general use, including use which relates to security.
			*
			* @param string Input string.
			* @return string 32-byte hexidecimal SHA1+HMAC hash.
			*/
			public static function digest($string) {
			$key = PhabricatorEnv::getEnvConfig('security.hmac-key');
			if (!$key) {
			throw new Exception(
			"Set a 'security.hmac-key' in your Phabricator configuration!");
			}

			return hash_hmac('sha1', $string, $key);
			}


			/**
			* Digest a string for use in, e.g., a MySQL index. This produces a short
			* (12-byte), case-sensitive alphanumeric string with 72 bits of entropy,
			* which is generally safe in most contexts (notably, URLs).
			*
			* This method emphasizes compactness, and should not be used for security
			* related hashing (for general purpose hashing, see @{method:digest}).
			*
			* @param string Input string.
			* @return string 12-byte, case-sensitive alphanumeric hash of the string
			* which
			*/
			public static function digestForIndex($string) {
			$hash = sha1($string, $raw_output = true);

			static $map;
			if ($map === null) {
			$map = "0123456789".
			"abcdefghij".
			"klmnopqrst".
			"uvwxyzABCD".
			"EFGHIJKLMN".
			"OPQRSTUVWX".
			"YZ._";
			}

			$result = '';
			for ($ii = 0; $ii < 12; $ii++) {
			$result .= $map[(ord($hash[$ii]) & 0x3F)];
			}

			return $result;
			}

			}