hex_search.py

def find_all(data, pattern):
    results = []
    start = 0
    plen = len(pattern)
    if plen == 0:
        return results
    while True:
        idx = data.find(pattern, start)
        if idx == -1:
            break
        results.append(idx)
        start = idx + 1
    return results

def extract_strings(data, min_len=4):
    results = []
    buf = []
    start = -1
    for i, b in enumerate(data):
        if 0x20 <= b <= 0x7E:
            if start == -1:
                start = i
            buf.append(chr(b))
        else:
            if len(buf) >= min_len:
                results.append((start, ''.join(buf)))
            buf = []
            start = -1
    if len(buf) >= min_len:
        results.append((start, ''.join(buf)))
    return results

def parse_search_input(text):
    text = text.strip()
    if not text:
        return b""
    parts = text.split()
    if all(len(p) == 2 and all(c in '0123456789abcdefABCDEF' for c in p) for p in parts):
        try:
            return bytes(int(p, 16) for p in parts)
        except:
            pass
    return text.encode('latin-1', errors='replace')

def build_search_set(results, pattern_len):
    flat = set()
    for r in results:
        for i in range(pattern_len):
            flat.add(r + i)
    return flat