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/*
* Copyright 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.
*/
// Authors: corbin.souffrant@leviathansecurity.com
// brian.balling@leviathansecurity.com
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <memory>
#include <string>
#include <thread>
#include <utility>
#include <fuzzer/FuzzedDataProvider.h>
#include <pdx/rpc/argument_encoder.h>
#include <pdx/rpc/array_wrapper.h>
#include <pdx/rpc/default_initialization_allocator.h>
#include <pdx/rpc/payload.h>
#include <pdx/rpc/serializable.h>
#include <pdx/rpc/serialization.h>
#include <pdx/rpc/string_wrapper.h>
#include <pdx/utility.h>
using namespace android::pdx;
using namespace android::pdx::rpc;
struct FuzzType {
int a;
float b;
std::string c;
FuzzType() {}
FuzzType(int a, float b, const std::string& c) : a(a), b(b), c(c) {}
private:
PDX_SERIALIZABLE_MEMBERS(FuzzType, a, b, c);
};
// Fuzzer for Serialization operations, this is mostly just lifted from the
// existing test cases to use fuzzed values as inputs.
void FuzzSerializeDeserialize(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload result;
// Currently, only fuzzing subset of types. In the future, may want
// to add more difficult to generate types like array, map, enum, etc...
bool b_val = fdp.ConsumeBool();
uint8_t u8_val = fdp.ConsumeIntegral<uint8_t>();
uint16_t u16_val = fdp.ConsumeIntegral<uint16_t>();
uint32_t u32_val = fdp.ConsumeIntegral<uint32_t>();
uint64_t u64_val = fdp.ConsumeIntegral<uint64_t>();
int8_t i8_val = fdp.ConsumeIntegral<int8_t>();
int16_t i16_val = fdp.ConsumeIntegral<uint16_t>();
int32_t i32_val = fdp.ConsumeIntegral<uint32_t>();
int64_t i64_val = fdp.ConsumeIntegral<uint64_t>();
float f_val = fdp.ConsumeFloatingPoint<float>();
double d_val = fdp.ConsumeFloatingPoint<double>();
std::string s_val = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());
std::vector<uint8_t> vec_val =
fdp.ConsumeBytes<uint8_t>(fdp.remaining_bytes());
FuzzType t1_val{reinterpret_cast<int>(i32_val), f_val, s_val};
// Types need to be individually fuzzed because code path changes depending
// on which type is being serialized/deserialized.
Serialize(b_val, &result);
Deserialize(&b_val, &result);
Serialize(u8_val, &result);
Deserialize(&u8_val, &result);
Serialize(u16_val, &result);
Deserialize(&u16_val, &result);
Serialize(u32_val, &result);
Deserialize(&u32_val, &result);
Serialize(u64_val, &result);
Deserialize(&u64_val, &result);
Serialize(i8_val, &result);
Deserialize(&i8_val, &result);
Serialize(i16_val, &result);
Deserialize(&i16_val, &result);
Serialize(i32_val, &result);
Deserialize(&i32_val, &result);
Serialize(i64_val, &result);
Deserialize(&i64_val, &result);
Serialize(f_val, &result);
Deserialize(&f_val, &result);
Serialize(d_val, &result);
Deserialize(&d_val, &result);
Serialize(s_val, &result);
Deserialize(&s_val, &result);
Serialize(WrapString(s_val), &result);
Deserialize(&s_val, &result);
Serialize(vec_val, &result);
Deserialize(&vec_val, &result);
Serialize(t1_val, &result);
Deserialize(&t1_val, &result);
}
void FuzzDeserializeUint8(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_UINT8, fdp.ConsumeIntegral<uint8_t>()};
std::uint8_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeUint16(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_UINT16, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::uint16_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeUint32(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_UINT32, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::uint32_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeUint64(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {
ENCODING_TYPE_UINT64, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::uint64_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeInt8(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_INT8, fdp.ConsumeIntegral<uint8_t>()};
std::int8_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeInt16(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_INT16, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::int16_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeInt32(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_INT32, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::int32_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeInt64(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_INT64,
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
std::int64_t result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeFloat32(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_FLOAT32, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
float floatResult;
Deserialize(&floatResult, &buffer);
buffer.Rewind();
double doubleResult;
Deserialize(&doubleResult, &buffer);
}
void FuzzDeserializeFloat64(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {
ENCODING_TYPE_FLOAT64, fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(), fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
double result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeFixstr(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
std::string s_val = fdp.ConsumeRemainingBytesAsString();
Payload buffer = {ENCODING_TYPE_FIXSTR_MAX};
for (std::string::iterator iter = s_val.begin(); iter != s_val.end();
iter++) {
buffer.Append(1, *iter);
}
std::string result;
Deserialize(&result, &buffer);
}
void FuzzDeserializeFixmap(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_FIXMAP_MAX};
// Fill the map with the fuzzed data, not attempting to
// make a valid map
while (fdp.remaining_bytes() > 0) {
buffer.Append(1, fdp.ConsumeIntegral<uint8_t>());
}
std::map<std::uint32_t, std::uint32_t> result;
Deserialize(&result, &buffer);
buffer.Rewind();
std::unordered_map<std::uint32_t, std::uint32_t> unorderedResult;
Deserialize(&unorderedResult, &buffer);
}
void FuzzDeserializeVariant(const uint8_t* data, size_t size) {
FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
Payload buffer = {ENCODING_TYPE_INT16,
ENCODING_TYPE_FLOAT32,
ENCODING_TYPE_FIXSTR_MAX,
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>(),
fdp.ConsumeIntegral<uint8_t>()};
// Add the rest of the data as a string
std::string s_val = fdp.ConsumeRemainingBytesAsString();
for (std::string::iterator iter = s_val.begin(); iter != s_val.end();
iter++) {
buffer.Append(1, *iter);
}
Variant<int, float, std::string> result;
Deserialize(&result, &buffer);
}
// Attempts to deserialize fuzzed data as various types
void FuzzDeserialize(const uint8_t* data, size_t size) {
FuzzDeserializeUint8(data, size);
FuzzDeserializeUint16(data, size);
FuzzDeserializeUint32(data, size);
FuzzDeserializeUint64(data, size);
FuzzDeserializeInt8(data, size);
FuzzDeserializeInt16(data, size);
FuzzDeserializeInt32(data, size);
FuzzDeserializeInt64(data, size);
FuzzDeserializeFloat32(data, size);
FuzzDeserializeFloat64(data, size);
FuzzDeserializeFixstr(data, size);
FuzzDeserializeFixmap(data, size);
FuzzDeserializeVariant(data, size);
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FuzzSerializeDeserialize(data, size);
FuzzDeserialize(data, size);
return 0;
}
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