Which mode enables writing your own C code to formulate guesses?

• A. Single Crack
• B. Wordlist
• C. Incremental
• D. External

Answer: (D)

External mode is the option that lets you plug in your own C code to generate password guesses. You write a small program in C that outputs each candidate to stdout, and the cracker consumes those candidates to test them against the hashes. This is useful when you need a custom generation strategy that isn’t covered by built-in methods. For example, you can encode specific patterns, data-driven rules, or application-specific logic directly in your code. Other modes rely on predefined methods—using a dictionary in wordlist mode, enumerating from character sets in incremental, or forming guesses from user-related data in single crack—whereas external mode lets you implement and run your own generator.