174 lines
5.0 KiB
C++
174 lines
5.0 KiB
C++
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2022 Nathaniel Brough
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <cassert>
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#include <fuzzer/FuzzedDataProvider.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "class/cdc/cdc_device.h"
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#include "fuzz/fuzz.h"
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#include "tusb.h"
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#include <cstdint>
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#include <string>
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#include <vector>
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extern "C" {
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#define FUZZ_ITERATIONS 500
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF PROTYPES
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//--------------------------------------------------------------------+
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void cdc_task(FuzzedDataProvider *provider);
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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FuzzedDataProvider provider(Data, Size);
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std::vector<uint8_t> callback_data = provider.ConsumeBytes<uint8_t>(
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provider.ConsumeIntegralInRange<size_t>(0, Size));
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fuzz_init(callback_data.data(), callback_data.size());
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// init device stack on configured roothub port
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tud_init(BOARD_TUD_RHPORT);
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for (int i = 0; i < FUZZ_ITERATIONS; i++) {
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if (provider.remaining_bytes() == 0) {
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return 0;
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}
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tud_int_handler(provider.ConsumeIntegral<uint8_t>());
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tud_task(); // tinyusb device task
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cdc_task(&provider);
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}
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return 0;
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}
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//--------------------------------------------------------------------+
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// USB CDC
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//--------------------------------------------------------------------+
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enum CdcApiFuncs {
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kCdcNConnected,
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kCdcNGetLineState,
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kCdcNGetLineCoding,
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kCdcNSetWantedChar,
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kCdcNAvailable,
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kCdcNRead,
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kCdcNReadChar,
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kCdcNReadFlush,
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kCdcNPeek,
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kCdcNWrite,
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kCdcNWriteChar,
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kCdcNWriteStr,
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kCdcNWriteFlush,
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kCdcNWriteAvailable,
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kCdcNWriteClear,
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// We don't need to fuzz tud_cdc_<not n>* as they are just wrappers
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// calling with n==0.
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kMaxValue,
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};
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void cdc_task(FuzzedDataProvider *provider) {
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assert(provider != NULL);
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const int kMaxBufferSize = 4096;
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switch (provider->ConsumeEnum<CdcApiFuncs>()) {
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case kCdcNConnected:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_connected(0);
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break;
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case kCdcNGetLineState:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_get_line_state(0);
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break;
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case kCdcNGetLineCoding: {
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cdc_line_coding_t coding;
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// TODO: Fuzz interface number
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(void)tud_cdc_n_get_line_coding(0, &coding);
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} break;
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case kCdcNSetWantedChar:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_set_wanted_char(0, provider->ConsumeIntegral<char>());
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break;
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case kCdcNAvailable:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_available(0);
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break;
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case kCdcNRead: {
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std::vector<uint8_t> buffer;
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buffer.resize(provider->ConsumeIntegralInRange<size_t>(0, kMaxBufferSize));
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// TODO: Fuzz interface number
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(void)tud_cdc_n_read(0, buffer.data(), buffer.size());
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break;
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}
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case kCdcNReadChar:
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// TODO: Fuzz interface number
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tud_cdc_n_read_char(0);
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break;
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case kCdcNReadFlush:
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// TODO: Fuzz interface number
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tud_cdc_n_read_flush(0);
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break;
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case kCdcNPeek: {
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uint8_t peak = 0;
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tud_cdc_n_peek(0, &peak);
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break;
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}
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case kCdcNWrite: {
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std::vector<uint8_t> buffer = provider->ConsumeBytes<uint8_t>(
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provider->ConsumeIntegralInRange<size_t>(0, kMaxBufferSize));
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write(0, buffer.data(), buffer.size());
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} break;
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case kCdcNWriteChar:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write_char(0, provider->ConsumeIntegral<char>());
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break;
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case kCdcNWriteStr: {
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std::string str = provider->ConsumeRandomLengthString(kMaxBufferSize);
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write_str(0, str.c_str());
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break;
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}
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case kCdcNWriteFlush:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write_flush(0);
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break;
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case kCdcNWriteAvailable:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write_available(0);
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break;
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case kCdcNWriteClear:
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// TODO: Fuzz interface number
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(void)tud_cdc_n_write_clear(0);
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break;
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case kMaxValue:
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// Noop.
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break;
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}
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}
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} |