fuzzing-dictionary

A fuzzing dictionary provides domain-specific tokens like keywords and magic numbers to steer inputs toward interesting code paths. It solves the problem of fuzzing engines missing deep logic because they mutate inputs blindly without structural awareness.

A fuzzing dictionary uses quoted strings and hex escape sequences like "\x00" to represent non-printable bytes. This syntax allows fuzzers to inject binary constants and magic numbers required for testing file format handlers and binary protocols.

Yes, you can use the same fuzzing dictionary with libFuzzer and AFL++ because it supports cross-tool compatibility. The dictionary syntax uses standard quoted strings and hex escapes, making it usable across multiple fuzzing engines like cargo-fuzz as well.

For HTTP protocol testing, a fuzzing dictionary should contain protocol constants like "GET", "POST", "Content-Type", and "HTTP/1.1". These domain-specific tokens guide the fuzzer to generate valid structural inputs and reach deeper parser logic.

Fuzzers miss deep code paths when testing file format handlers because they mutate inputs blindly without structural awareness. Providing a fuzzing dictionary with domain-specific tokens steers mutations toward valid keywords and magic numbers to increase coverage.