Simplified elapsed time calculating

src/fr/motysten/usertwist/exploit/tools/Cesar.java

@@ -1,33 +1,33 @@
 package fr.motysten.usertwist.exploit.tools;
 
-import java.util.stream.Collectors;
-
 public class Cesar {
 
-    public static String rotate(String input, int offset) {
-        char normalizeKey = (char) (offset % 26);
+    public static final String LOWER_ALPHABET = "abcdefghijklmnopqrstuvwxyz";
+    public static final String UPPER_ALPHABET = LOWER_ALPHABET.toUpperCase();
 
-        return input.chars()
-                .mapToObj(c -> (char) c)
-                .map(c -> {
-                    if (Character.isLetter(c)) {
-                        char base;
-                        if (Character.isUpperCase(c)) {
-                            base = 'A';
-                        } else {
-                            base = 'a';
-                        }
-                        if (offset < 0) {
-                            return (char) (base + (c - base + normalizeKey) % 26);
-                        } else {
-                            return (char) (base + (c - base - normalizeKey + 26) % 26);
-                        }
-                    } else {
-                        return c;
-                    }
-                })
-                .map(String::valueOf)
-                .collect(Collectors.joining());
+    public static String cesarRotate(String input, int offset) {
+
+        while (offset < 0) {
+            offset += 26;
+        }
+
+        StringBuilder output = new StringBuilder();
+        
+        for (int i = 0; i < input.length(); i++) {
+            char newChar = input.charAt(i);
+            if (!Character.isDigit(input.charAt(i))) {
+                int pos = LOWER_ALPHABET.indexOf(Character.toLowerCase(input.charAt(i)));
+                int newPos = (pos + offset) % 26;
+                if (Character.isUpperCase(input.charAt(i))) {
+                    newChar = UPPER_ALPHABET.charAt(newPos);
+                } else {
+                    newChar = LOWER_ALPHABET.charAt(newPos);
+                }
+            }
+            output.append(newChar);
+        }
+
+        return output.toString();
     }
 
 }

src/fr/motysten/usertwist/exploit/tools/Parser.java

@@ -9,7 +9,7 @@ public class Parser {
         for (int i = 0; i < usersArray.length(); i++) {
             JSONObject user = usersArray.getJSONObject(i);
             String login = user.getString("username");
-            String password = Cesar.rotate(user.getString("data"), rotation);
+            String password = Cesar.cesarRotate(user.getString("data"), rotation);
 
             System.out.println((i + 1) + ". " + login + " => " + password);
         }
@@ -23,7 +23,7 @@ public class Parser {
             new Thread(() -> {
                 JSONObject user = usersArray.getJSONObject(finalI);
                 String login = user.getString("username");
-                String password = Cesar.rotate(user.getString("data"), rotation);
+                String password = Cesar.cesarRotate(user.getString("data"), rotation);
 
                 System.out.println((finalI + 1) + ". " + login + " => " + password);
             }).start();