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Dongjia Zhang 2021-12-05 00:19:41 +09:00 committed by GitHub
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fuzzers/frida_libpng/README.md
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@ -9,7 +9,8 @@ It has been tested on Linux.
To build this example, run `cargo build --release` in this folder.
This will call (the build.rs)[./build.rs], which in turn downloads a libpng archive from the web.
Then, it will link (the fuzzer)[./src/fuzzer.rs] against (the C++ harness)[./harness.cc] and the instrumented `libpng`.
Afterwards, the fuzzer will be ready to run, from `target/frida_libpng`.
Afterwards, the fuzzer will be ready to run, from `target/frida_libpng`.
On unix platforms, you'll need [libc++](https://libcxx.llvm.org/) to build it.
### Build For Android
When building for android using a cross-compiler, make sure you have a _standalone toolchain_, and then add the following:
@ -30,7 +31,7 @@ After building the libpng-harness, too, you can run `find . -name libpng-harness
`./target/release/frida_libpng ./libpng-harness.so LLVMFuzzerTestOneInput ./libpng-harness.so --cores=0`
## Windows
You can also fuzz libpng-1.6.37 on windows with frida mode!
You can also fuzz libpng-1.6.37 on windows with frida mode! (still experimental, we have an issue on frida-gum.)
### To build it with visual studio
1. Install clang for windows (make sure you add LLVM to the system path!)
@ -62,43 +63,3 @@ clang++ -L.\zlib.dll .\harness.o .\libpng16.lib -lzlib -shared -o .\libpng-harne
./frida_libpng.exe ./libpng-harness.dll LLVMFuzzerTestOneInput ./libpng-harness.dll --cores=0
```
### To build it with msys2
1. Install and setup msys2 (https://www.msys2.org/)
2. (Optional) If you prefer to compile libpng with clang, you can install it and its dependecy with
```
pacman -S mingw-w64-x86_64-clang
pacman -S mingw-w64-clang-x86_64-zlib
```
and
```
export LDFLAGS='-L/clang64/lib'
export CPPFLAGS='-I/clang64/include'
export CC=clang
export CXX=clang++
```
3. Compile frida_libpng (possibly from your powershell)
```
cargo build --release
cp ./target/release/frida_libpng.exe .
```
4. Compile libpng-1.6.37 with the following commands
```
cd libpng-1.6.37
./configure --enable-hardware-optimizations=yes --with-pic=yes
make
cd ..
```
5. Compile the harness with gcc or clang++
```
g++ -O3 -c -I./libpng-1.6.37 -fPIC harness.cc -o harness.o
g++ -O3 harness.o ./libpng-1.6.37/.libs/libpng16.a -static -shared -lz -o libpng-harness.dll
```
or
```
clang++ -O3 -c -I./libpng-1.6.37 -fPIC harness.cc -o harness.o
clang++ -O3 harness.o ./libpng-1.6.37/.libs/libpng16.a -static -shared -lz -o libpng-harness.dll
```
6. Run the fuzzer
```
./frida_libpng.exe ./libpng-harness.dll LLVMFuzzerTestOneInput ./libpng-harness.dll --cores=0
```