Function query_local_database

pwnlib/libcdb.py:200–235

(params)

    return None

def query_local_database(params):
    if not context.local_libcdb or not params.get("symbols"):
        return None

    localdb = Path(context.local_libcdb)
    if not localdb.is_dir():
        return None

    res = []
    query_syms = params["symbols"]

    # Loop through each '.symbols' file in the local database
    # Make sure `Path.rglod` order stable
    for symbol_file in sorted(localdb.rglob("*.symbols"), key=lambda x: x.as_posix()):
        libc_syms = _parse_libc_symbol(symbol_file)

        matched = 0
        for name, addr in query_syms.items():
            if isinstance(addr, str):
                addr = int(addr, 16) 

            # Compare last 12 bits
            if libc_syms.get(name) and (libc_syms.get(name) & 0xfff) == (addr & 0xfff):
                matched += 1
            else:
                # aborting this loop once there was a mismatch.
                break

        # Check if all symbols have been matched
        if matched == len(query_syms):
            libs_id = symbol_file.stem
            libc_path = symbol_file.parent / ("%s.so" % libs_id)
            libs_url = read(symbol_file.parent / ("%s.url" % libs_id)).decode().strip()
            res.append(_pack_libs_info(libc_path, libs_id, libs_url, libc_syms))

    return res

PROVIDERS = {
    "offline": [provider_local_system, provider_local_database],