Day 23

Day 23/decode.php

@@ -0,0 +1,62 @@
+#!/usr/bin/php
+<?php
+
+if(count($argv) < 4) {
+  die("Wrong Usage: " . $argv[0] . " <proc num> <start> <end>");
+}
+
+$PROC_NUM = $argv[1];
+
+if(!is_numeric($argv[2])) {
+  die("NaN: start");
+}
+
+if(!is_numeric($argv[3])) {
+  die("NaN: end");
+}
+
+$start = intval($argv[2]);
+$end   = intval($argv[3]);
+
+if($end < $start) {
+  die("Invalid interval: end < start");
+}
+
+$charset = 'abcdefghijkmpqrstuvwxyzABCDEFGHJKLMPQRSTUVWXYZ23456789';
+$zip = new ZipArchive();
+$zip_status = $zip->open("Santa-data.zip");
+if ($zip_status !== true) {
+  die("Could not open zip file");
+}
+
+for($t = $start; $t <= $end; $t++) {
+
+  srand($t);
+  $rand_str = "";
+
+  // if(($t-$start) % 10000000 == 0) {
+  //   $progress = (($t-$start) / ($end - $start)) * 100;
+  //   print("[$PROC_NUM] Progress: $progress%\n");
+  // }
+
+  for($j = 0; $j < 12; $j++) {
+    $rand_key = rand(0, 54 - 1);
+    $rand_str .= $charset[$rand_key];
+  }
+
+  // stdout for john
+  // if(strcmp($rand_str, "Kwmq3Sqmc5sA") == 0) {
+  //   die("Done: $t\n");
+  // }
+
+  // 4160000
+  // print("$rand_str\n");
+  //
+  if ($zip->setPassword($rand_str)) {
+    if ($zip->extractTo(__DIR__)) {
+      die("PASSWORD: $rand_str");
+    }
+  }
+}
+
+?>