From 645303c0e956ef5fb63dc117ce6cde67df05b982 Mon Sep 17 00:00:00 2001
From: Peter Rotich <peter@osticket.com>
Date: Thu, 16 Jan 2014 20:06:56 +0000
Subject: [PATCH] Add base32 encode/decode implementation
---
include/class.base32.php | 121 +++++++++++++++++++++++++++++++++++++++
include/class.crypto.php | 2 +
2 files changed, 123 insertions(+)
create mode 100755 include/class.base32.php
diff --git a/include/class.base32.php b/include/class.base32.php
new file mode 100755
index 000000000..ce83828f8
--- /dev/null
+++ b/include/class.base32.php
@@ -0,0 +1,121 @@
+<?php
+/*
+ * Base32 encoder/decoder
+ *
+ * Jared Hancock <jared@osticket.com>
+ * Copyright (c) osTicket.com
+ */
+
+
+class Base32 {
+
+ /**
+ * encode a binary string
+ *
+ * @param $inString Binary string to base32 encode
+ * @return $outString Base32 encoded $inString
+ *
+ * Original code from
+ * http://www.phpkode.com/source/p/moodle/moodle/lib/base32.php. Optimized
+ * to double performance
+ */
+
+ function encode($inString)
+ {
+ $outString = "";
+ $compBits = "";
+ static $BASE32_TABLE = array(
+ '00000' => 'a', '00001' => 'b', '00010' => 'c', '00011' => 'd',
+ '00100' => 'e', '00101' => 'f', '00110' => 'g', '00111' => 'h',
+ '01000' => 'i', '01001' => 'j', '01010' => 'k', '01011' => 'l',
+ '01100' => 'm', '01101' => 'n', '01110' => 'o', '01111' => 'p',
+ '10000' => 'q', '10001' => 'r', '10010' => 's', '10011' => 't',
+ '10100' => 'u', '10101' => 'v', '10110' => 'w', '10111' => 'x',
+ '11000' => 'y', '11001' => 'z', '11010' => '0', '11011' => '1',
+ '11100' => '2', '11101' => '3', '11110' => '4', '11111' => '5');
+
+ /* Turn the compressed string into a string that represents the bits as 0 and 1. */
+ for ($i = 0, $k = strlen($inString); $i < $k; $i++) {
+ $compBits .= str_pad(decbin(ord($inString[$i])), 8, '0', STR_PAD_LEFT);
+ }
+
+ /* Pad the value with enough 0's to make it a multiple of 5 */
+ if ((($len = strlen($compBits)) % 5) != 0) {
+ $compBits = str_pad($compBits, $len+(5-($len % 5)), '0', STR_PAD_RIGHT);
+ }
+
+ /* Create an array by chunking it every 5 chars */
+ $fiveBitsArray = str_split($compBits, 5);
+
+ /* Look-up each chunk and add it to $outstring */
+ foreach ($fiveBitsArray as $fiveBitsString) {
+ $outString .= $BASE32_TABLE[$fiveBitsString];
+ }
+
+ return $outString;
+ }
+
+
+
+ /**
+ * decode to a binary string
+ *
+ * @param $inString String to base32 decode
+ *
+ * @return $outString Base32 decoded $inString
+ *
+ * @access private
+ *
+ */
+
+ function decode($inString) {
+ /* declaration */
+ $deCompBits = '';
+ $outString = '';
+
+ static $BASE32_TABLE = array(
+ 'a' => '00000', 'b' => '00001', 'c' => '00010', 'd' => '00011',
+ 'e' => '00100', 'f' => '00101', 'g' => '00110', 'h' => '00111',
+ 'i' => '01000', 'j' => '01001', 'k' => '01010', 'l' => '01011',
+ 'm' => '01100', 'n' => '01101', 'o' => '01110', 'p' => '01111',
+ 'q' => '10000', 'r' => '10001', 's' => '10010', 't' => '10011',
+ 'u' => '10100', 'v' => '10101', 'w' => '10110', 'x' => '10111',
+ 'y' => '11000', 'z' => '11001', '0' => '11010', '1' => '11011',
+ '2' => '11100', '3' => '11101', '4' => '11110', '5' => '11111');
+
+ /* Step 1 */
+ $inputCheck = strlen($inString) % 8;
+ if(($inputCheck == 1)||($inputCheck == 3)||($inputCheck == 6)) {
+ trigger_error('input to Base32Decode was a bad mod length: '.$inputCheck);
+ return false;
+ }
+
+ /* $deCompBits is a string that represents the bits as 0 and 1.*/
+ for ($i = 0, $k = strlen($inString); $i < $k; $i++) {
+ $inChar = $inString[$i];
+ if(isset($BASE32_TABLE[$inChar])) {
+ $deCompBits .= $BASE32_TABLE[$inChar];
+ } else {
+ trigger_error('input to Base32Decode had a bad character: '.$inChar);
+ return false;
+ }
+ }
+
+ /* Break the decompressed string into octets for returning */
+ foreach (str_split($deCompBits, 8) as $chunk) {
+ if (strlen($chunk) != 8) {
+ // Ensure correct padding
+ if (substr_count($chunk, '1')>0) {
+ trigger_error('found non-zero padding in Base32Decode');
+ return false;
+ }
+ break;
+ }
+ $outString .= chr(bindec($chunk));
+ }
+
+ return $outString;
+ }
+}
+
+?>
diff --git a/include/class.crypto.php b/include/class.crypto.php
index 92ab1e953..a9aebcd2f 100644
--- a/include/class.crypto.php
+++ b/include/class.crypto.php
@@ -26,6 +26,8 @@ define('CRYPT_PHPSECLIB', 3);
define('CRYPT_IS_WINDOWS', !strncasecmp(PHP_OS, 'WIN', 3));
+
+require_once INCLUDE_DIR.'class.base32.php';
require_once PEAR_DIR.'Crypt/Hash.php';
require_once PEAR_DIR.'Crypt/AES.php';
--
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