libsoliton/soliton/fuzz/fuzz_targets/fuzz_verification_phrase.rs

#![no_main]
use libfuzzer_sys::fuzz_target;
use soliton::verification::verification_phrase;

fuzz_target!(|data: &[u8]| {
    // verification_phrase validates exact size (3200 bytes each).
    // Fixed split: inputs ≥ 6400 bytes always produce two exact 3200-byte
    // halves regardless of total length, so the SHA-512 word derivation and
    // rejection-sampling loop (20-rehash cap) are reachable from any input
    // of 6400+ bytes. A midpoint split would only reach that path for
    // inputs of exactly 6400 bytes.
    const PK_SIZE: usize = 3200; // SOLITON_PUBLIC_KEY_SIZE
    const MIN: usize = 2 * PK_SIZE;
    if data.len() < MIN {
        return;
    }
    let _ = verification_phrase(&data[..PK_SIZE], &data[PK_SIZE..MIN]);
});