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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <BufferAllocator/BufferAllocator.h>
#include <TrustyIpc.h>
#include <iostream>
#include <stdlib.h>
#include <sys/mman.h>
#include <time.h>
#include <trusty/coverage/coverage.h>
#include <trusty/fuzz/counters.h>
#include <trusty/fuzz/utils.h>
#include <trusty/tipc.h>
#include <unistd.h>
using android::trusty::coverage::CoverageRecord;
using android::trusty::fuzz::ExtraCounters;
using android::trusty::fuzz::TrustyApp;
#define countof(arr) (sizeof(arr) / sizeof(arr[0]))
#define TIPC_DEV "/dev/trusty-ipc-dev0"
#define CONFIRMATIONUI_PORT "com.android.trusty.confirmationui"
#define CONFIRMATIONUI_MODULE_NAME "confirmationui.syms.elf"
/* A request to render to screen may take a while. */
const size_t kTimeoutSeconds = 30;
/* ConfirmationUI TA's UUID is 7dee2364-c036-425b-b086-df0f6c233c1b */
static struct uuid confirmationui_uuid = {
0x7dee2364,
0xc036,
0x425b,
{0xb0, 0x86, 0xdf, 0x0f, 0x6c, 0x23, 0x3c, 0x1b},
};
static CoverageRecord record(TIPC_DEV, &confirmationui_uuid, CONFIRMATIONUI_MODULE_NAME);
static android::base::unique_fd dma_buf;
static void* shm_base;
extern "C" int LLVMFuzzerInitialize(int* /* argc */, char*** /* argv */) {
auto ret = record.Open();
if (!ret.ok()) {
std::cerr << ret.error() << std::endl;
exit(-1);
}
BufferAllocator allocator;
dma_buf.reset(allocator.Alloc(kDmabufSystemHeapName, CONFIRMATIONUI_MAX_MSG_SIZE));
if (dma_buf < 0) {
std::cerr << "Failed to allocate dma_buf" << std::endl;
exit(-1);
}
shm_base = mmap(0, CONFIRMATIONUI_MAX_MSG_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, dma_buf, 0);
if (shm_base == MAP_FAILED) {
std::cerr << "Failed to mmap() dma_buf" << std::endl;
exit(-1);
}
return 0;
}
static bool Init(int chan, int dma_buf) {
confirmationui_hdr hdr = {
.cmd = CONFIRMATIONUI_CMD_INIT,
};
confirmationui_init_req args = {
.shm_len = CONFIRMATIONUI_MAX_MSG_SIZE,
};
iovec iov[] = {
{
.iov_base = &hdr,
.iov_len = sizeof(hdr),
},
{
.iov_base = &args,
.iov_len = sizeof(args),
},
};
trusty_shm shm = {
.fd = dma_buf,
.transfer = TRUSTY_SHARE,
};
int rc = tipc_send(chan, iov, countof(iov), &shm, 1);
if (rc != static_cast<int>(sizeof(hdr) + sizeof(args))) {
return false;
}
rc = read(chan, &hdr, sizeof(hdr));
if (rc != static_cast<int>(sizeof(hdr))) {
return false;
}
return true;
}
static bool Msg(int chan, const uint8_t* data, size_t size) {
confirmationui_hdr hdr = {
.cmd = CONFIRMATIONUI_CMD_MSG,
};
confirmationui_msg_args args = {
.msg_len = static_cast<uint32_t>(size),
};
iovec iov[] = {
{
.iov_base = &hdr,
.iov_len = sizeof(hdr),
},
{
.iov_base = &args,
.iov_len = sizeof(args),
},
};
memset(shm_base, 0, CONFIRMATIONUI_MAX_MSG_SIZE);
memcpy(shm_base, data, size);
int rc = tipc_send(chan, iov, countof(iov), NULL, 0);
if (rc != static_cast<int>(sizeof(hdr) + sizeof(args))) {
return false;
}
rc = readv(chan, iov, countof(iov));
if (rc != static_cast<int>(sizeof(hdr) + sizeof(args))) {
return false;
}
return true;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
ExtraCounters counters(&record);
counters.Reset();
TrustyApp ta(TIPC_DEV, CONFIRMATIONUI_PORT);
auto ret = ta.Connect();
if (!ret.ok()) {
android::trusty::fuzz::Abort();
}
int chan = *ta.GetRawFd();
alarm(kTimeoutSeconds);
bool success = Init(chan, dma_buf);
alarm(0);
if (!success) {
android::trusty::fuzz::Abort();
}
alarm(kTimeoutSeconds);
success = Msg(chan, data, size);
alarm(0);
if (!success) {
android::trusty::fuzz::Abort();
}
return 0;
}
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