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trusty: Fuzz keymaster TA using generic TIPC fuzzer

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Bug: 171750250
Test: trusty_keymaster_fuzzer
Change-Id: I94a1cc28276d198f698906212a8a5d15ac07ae1e
This commit is contained in:
Tri Vo 2021-02-27 14:09:04 -08:00
parent e4a80fe066
commit 123c038e1a
2 changed files with 6 additions and 77 deletions
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7
trusty/keymaster/fuzz/Android.bp
View file

@ -19,7 +19,12 @@ package {
cc_fuzz {
name: "trusty_keymaster_fuzzer",
defaults: ["trusty_fuzzer_defaults"],
srcs: ["fuzz.cpp"],
srcs: [":trusty_tipc_fuzzer"],
cflags: [
"-DTRUSTY_APP_PORT=\"com.android.trusty.keymaster\"",
"-DTRUSTY_APP_UUID=\"5f902ace-5e5c-4cd8-ae54-87b88c22ddaf\"",
"-DTRUSTY_APP_FILENAME=\"keymaster.syms.elf\"",
],
// The initial corpus for this fuzzer was derived by dumping messages from
// the `secure_env` emulator interface for cuttlefish while running the

76
trusty/keymaster/fuzz/fuzz.cpp
View file

@ -1,76 +0,0 @@
/*
* Copyright (C) 2020 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 <stdlib.h>
#include <trusty/coverage/coverage.h>
#include <trusty/fuzz/counters.h>
#include <trusty/fuzz/utils.h>
#include <unistd.h>
#include <iostream>
using android::trusty::coverage::CoverageRecord;
using android::trusty::fuzz::ExtraCounters;
using android::trusty::fuzz::TrustyApp;
#define TIPC_DEV "/dev/trusty-ipc-dev0"
#define KEYMASTER_PORT "com.android.trusty.keymaster"
#define KEYMASTER_MODULE_FILENAME "keymaster.syms.elf"
/* Keymaster TA's UUID is 5f902ace-5e5c-4cd8-ae54-87b88c22ddaf */
static struct uuid keymaster_uuid = {
0x5f902ace,
0x5e5c,
0x4cd8,
{0xae, 0x54, 0x87, 0xb8, 0x8c, 0x22, 0xdd, 0xaf},
};
static CoverageRecord record(TIPC_DEV, &keymaster_uuid, KEYMASTER_MODULE_FILENAME);
extern "C" int LLVMFuzzerInitialize(int* /* argc */, char*** /* argv */) {
auto ret = record.Open();
if (!ret.ok()) {
std::cerr << ret.error() << std::endl;
exit(-1);
}
return 0;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
static uint8_t buf[TIPC_MAX_MSG_SIZE];
ExtraCounters counters(&record);
counters.Reset();
android::trusty::fuzz::TrustyApp ta(TIPC_DEV, KEYMASTER_PORT);
auto ret = ta.Connect();
if (!ret.ok()) {
android::trusty::fuzz::Abort();
}
/* Send message to test server */
ret = ta.Write(data, size);
if (!ret.ok()) {
return -1;
}
/* Read message from test server */
ret = ta.Read(&buf, sizeof(buf));
if (!ret.ok()) {
return -1;
}
return 0;
}