From f9d644e7f357a21aa64a5de27408b74cbd345dc8 Mon Sep 17 00:00:00 2001 From: Nguyễn Gia Phong Date: Mon, 4 Nov 2024 16:49:47 +0900 Subject: Rework build recipe --- AUTHORS | 6 - CHANGES | 21 +- CHANGES.license | 3 + Dockerfile | 52 --- LICENSE | 202 ------------ LICENSES/AGPL-3.0-or-later.txt | 661 +++++++++++++++++++++++++++++++++++++ LICENSES/Apache-2.0.txt | 202 ++++++++++++ Makefile | 72 ++-- README.md | 135 +++----- README.md.license | 4 + afl-dyninst-env.m4 | 10 + afl-dyninst.cc | 693 ++++++++++++++++++++++++++++++++++++++ afl-dyninst.cpp | 732 ----------------------------------------- afl-dyninst.h.m4 | 11 + afl-dyninst.sh | 3 - afl-fuzz-dyninst.sh | 14 - libAflDyninst.cpp | 211 ------------ libafldyninst.cc | 200 +++++++++++ 18 files changed, 1879 insertions(+), 1353 deletions(-) delete mode 100644 AUTHORS create mode 100644 CHANGES.license delete mode 100644 Dockerfile delete mode 100644 LICENSE create mode 100644 LICENSES/AGPL-3.0-or-later.txt create mode 100644 LICENSES/Apache-2.0.txt create mode 100644 README.md.license create mode 100644 afl-dyninst-env.m4 create mode 100644 afl-dyninst.cc delete mode 100644 afl-dyninst.cpp create mode 100644 afl-dyninst.h.m4 delete mode 100755 afl-dyninst.sh delete mode 100755 afl-fuzz-dyninst.sh delete mode 100644 libAflDyninst.cpp create mode 100644 libafldyninst.cc diff --git a/AUTHORS b/AUTHORS deleted file mode 100644 index cc113dc..0000000 --- a/AUTHORS +++ /dev/null @@ -1,6 +0,0 @@ -This code was developed as part of a project with the Cisco Talos VULNDEV Team - -Authors: - Aleksandar Nikolic - Marc "van Hauser" Heuse || - diff --git a/CHANGES b/CHANGES index 9b94b79..b588b5c 100644 --- a/CHANGES +++ b/CHANGES @@ -1,7 +1,18 @@ -Changelog -========= +Tag: 1.0.0 + + Build recipe rework + + Additions: + - Compliance with REUSE 3.0 has been added + + Removals: + - Support for Dyninst < 10 has been dropped + - Command-line options -dfl have been removed + + +Remote: https://github.com/vanhauser-thc/afl-dyninst +Date: 2021-05-21 -https://github.com/vanhauser-thc/afl-dyninst - performance level 1 is now standard and only -x needed for extra performance flags. There was no disadvantage in previous level 1 so its default now. - removed -l option because of bugs in the implementation, bugs in dyninst @@ -36,4 +47,6 @@ https://github.com/vanhauser-thc/afl-dyninst - code beautifications, more detailed output, spelling fixes - added afl-dyninst.sh and afl-fuzz.sh helper scripts which presets the necessary environment variables - => intial fork from https://github.com/talos-vulndev/afl-dyninst + +Remote: https://github.com/talos-vulndev/afl-dyninst +Date: 2018-03-17 diff --git a/CHANGES.license b/CHANGES.license new file mode 100644 index 0000000..e035eb6 --- /dev/null +++ b/CHANGES.license @@ -0,0 +1,3 @@ +SPDX-FileCopyrightText: 2018-2020 Marc "van Hauser" Heuse +SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +SPDX-License-Identifier: Apache-2.0 diff --git a/Dockerfile b/Dockerfile deleted file mode 100644 index 998ffc7..0000000 --- a/Dockerfile +++ /dev/null @@ -1,52 +0,0 @@ -FROM kalilinux/kali-rolling AS afl-dyninst -MAINTAINER vh@thc.org - -ARG DEBIAN_FRONTEND=noninteractive -RUN apt-get update && apt-get -y upgrade && apt-get -y install \ - build-essential \ - gcc \ - g++ \ - make \ - cmake \ - git \ - gdb \ - ca-certificates \ - tar \ - gzip \ - vim \ - joe \ - wget \ - curl \ - apt-utils \ - libelf-dev \ - libelf1 \ - libiberty-dev \ - libboost-all-dev \ - libdw-dev \ - libtbb2 \ - libtbb-dev \ - && apt-get -y autoremove && rm -rf /var/lib/apt/lists/* - -RUN git clone --depth=1 https://github.com/dyninst/dyninst \ - && cd dyninst && mkdir build && cd build \ - && cmake .. \ - && make -j3 \ - && make install - -RUN git clone --depth=1 https://github.com/AFLplusplus/AFLplusplus \ - && cd AFLplusplus \ - && make source-only \ - && make install - -RUN git clone --depth=1 https://github.com/vanhauser-thc/afl-dyninst \ - && cd afl-dyninst \ - && ln -s ../AFLplusplus afl \ - && make \ - && make install - -RUN echo "/usr/local/lib" > /etc/ld.so.conf.d/dyninst.conf && ldconfig \ - && echo "export DYNINSTAPI_RT_LIB=/usr/local/lib/libdyninstAPI_RT.so" >> .bashrc - -RUN rm -rf afl-dyninst AFLplusplus dyninst - -ENV DYNINSTAPI_RT_LIB /usr/local/lib/libdyninstAPI_RT.so diff --git a/LICENSE b/LICENSE deleted file mode 100644 index d645695..0000000 --- a/LICENSE +++ /dev/null @@ -1,202 +0,0 @@ - - Apache License - Version 2.0, January 2004 - http://www.apache.org/licenses/ - - TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION - - 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + 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. diff --git a/Makefile b/Makefile index 305e0a1..d6a0829 100644 --- a/Makefile +++ b/Makefile @@ -1,49 +1,49 @@ -# EDIT: path to dyninst binaries -DYNINST_ROOT = /usr/local +# Build recipe +# +# SPDX-FileCopyrightText: 2016 Aleksandar Nikolic +# SPDX-FileCopyrightText: 2018-2020 Marc "van Hauser" Heuse +# SPDX-License-Identifier: Apache-2.0 +# +# SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +# SPDX-License-Identifier: AGPL-3.0-or-later -# EDIT: you must set this to your dyninst build directory -DYNINST_BUILD = /path/to/dyninst/build-directory -#DYNINST_BUILD = /prg/tmp/dyninst/build-10.0.1 +.POSIX: +.PHONY: all clean install -# EDIT: path to afl src if you do not set a symlink from ./afl to the afl directory -AFL_ROOT = ./afl +CXXFLAGS += -std=c++11 -Wextra -Werror +LDFLAGS ?= -fPIC +LDLIBS += -ldyninstAPI -# better dont touch these -DYNINST9=-lcommon -liberty -lboost_system -DYNINST10=-I$(DYNINST_BUILD)/tbb/src/TBB/src/include -lboost_system -ltbb +PREFIX ?= /usr/local +BINDIR ::= $(DESTDIR)$(PREFIX)/bin +LIBDIR ::= $(DESTDIR)$(PREFIX)/lib -# EDIT: set this to either DYNINST9 or DYNINST10 depending on what you installed -DYNINST_OPT = $(DYNINST10) +# Override on non-FHS environments +DYNINST_LIB ?= $(LIBDIR) +# Override to . for local development +AFL_DYNINST_LIB ?= $(LIBDIR) -# path to libelf and libdwarf -DEPS_ROOT = /usr/local +BIN ::= afl-dyninst afl-dyninst-env +LIB ::= libafldyninst.so -# where to install -INSTALL_ROOT = /usr/local +all: $(BIN) $(LIB) -#CXX = g++ -CXXFLAGS = -Wall -O3 -std=c++11 -g -O3 -std=c++11 -LIBFLAGS = -fpic -shared +afl-dyninst: afl-dyninst.cc afl-dyninst.h -CC = gcc -CFLAGS = -Wall -O3 -g -std=gnu99 +afl-dyninst%: afl-dyninst%.m4 + m4 -D AFL_DYNINST_LIB=$(AFL_DYNINST_LIB)\ + -D DYNINST_LIB=$(DYNINST_LIB) $< > $@ -all: afl-dyninst libAflDyninst.so +%.so: %.cc + $(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) -shared $< -o $@ -afl-dyninst: afl-dyninst.o - $(CXX) $(CXXFLAGS) -L$(DYNINST_ROOT)/lib -L$(DEPS_ROOT)/lib -o afl-dyninst afl-dyninst.o $(DYNINST_OPT) -ldyninstAPI - -libAflDyninst.so: libAflDyninst.cpp - $(CXX) -O3 -std=c++11 $(LIBFLAGS) -I$(AFL_ROOT) -I$(DYNINST_ROOT)/include -I$(DEPS_ROOT)/include libAflDyninst.cpp -o libAflDyninst.so +clean: + rm -f $(BIN) $(LIB) -afl-dyninst.o: afl-dyninst.cpp - $(CXX) $(CXXFLAGS) $(DYNINST_OPT) -I$(DEPS_ROOT)/include -I$(DYNINST_ROOT)/include -c afl-dyninst.cpp +install: $(BIN:%=$(BINDIR)/%) $(LIB:%=$(LIBDIR)/%) -clean: - rm -f afl-dyninst *.so *.o +$(BINDIR)/%: % + install -Dm 755 $< $@ -install: all - install -d $(INSTALL_ROOT)/bin - install -d $(INSTALL_ROOT)/lib - install afl-dyninst afl-dyninst.sh afl-fuzz-dyninst.sh $(INSTALL_ROOT)/bin - install libAflDyninst.so $(INSTALL_ROOT)/lib +$(LIBDIR)/%: % + install -Dm 644 $< $@ diff --git a/README.md b/README.md index 6caac73..2119d58 100644 --- a/README.md +++ b/README.md @@ -1,4 +1,7 @@ -# American Fuzzy Lop + Dyninst == AFL Fuzzing blackbox binaries +# AFL Dyninst + +AFL Dyninst uses Dyninst to insert AFL instrumentations into binaries +for binary fuzzing. The tool has two parts. The instrumentation tool and the instrumentation library. Instrumentation library has an initialization callback and basic @@ -6,68 +9,24 @@ block callback functions which are designed to emulate what AFL is doing with afl-gcc/afl-g++/afl-as. Instrumentation tool (afl-dyninst) instruments the supplied binary by -inserting callbacks for each basic block and an initialization -callback either at _init or at specified entry point. - -You can pull a docker image from hub (last push February 2021): -``` -docker pull vanhauser/afl-dyninst -``` - -## Building / Compiling - -### docker - -simply run -``` -docker build -t afl-dyninst . -``` -which will take ~25 minutes. -Afterwards you have a containers with afl-dyninst and afl++: -``` -docker run -ti afl-dyninst -``` - -### on your own - -1. Clone, compile and install dyninst: [https://github.com/dyninst/dyninst](https://github.com/dyninst/dyninst) - -Note that you could also use dyninst 9.3.2, but has less platform support and -quite a few bugs. For using dyninst 9.x you have to edit the Makefile -Using at least 10.1.0 is highly recommended! - -2. Download and install afl++ from [https://github.com/vanhauser-thc/AFLplusplus](https://github.com/vanhauser-thc/AFLplusplus) -It's an up to date and enhanced version to the original afl with better -performance, new features and bugfixes. - -3. Edit the Makefile and set DYNINST_ROOT and AFL_ROOT to appropriate paths. - -4. make +inserting callbacks for each basic block and an initialization +callback either at `_init` or at specified entry point. -5. sudo make install +## Installation +As its name suggest, AFL Dyninst requires [AFL++] 4.22 or above +and [Dyninst] 10 or above at running time. To build afl-dyninst, +you also need make(1p), m4(1p) and a C++11 compiler. -### Building dyninst 10 - -Building dyninst10 can be a pain. -If you are not on debian-testing or kali-rolling, I recommend the following steps: -1. remove elfutils if installed as a distribution package -2. install libboost-all-dev for your distribution -3. execute (depending where your libboost is installed, for me its /usr/lib/x86_64-linux-gnu): -```shell -cd /usr/lib/x86_64-linux-gnu && for i in libboost*.so libboost*.a; do - n=`echo $i|sed 's/\./-mt./'` - ln -s $i $n 2> /dev/null -done -``` -4. git clone https://github.com/dyninst/dyninst ; mkdir build ; cd build ; cmake .. ; make ; make install -If dyninst complains about any missing packages - install them. -Depending on the age of your Linux OS you can try to use packages from your distro, and install from source otherwise. +Since `afl-dyninst` does not relink the output binary, +path to Dyninst library needs to be passed to the build tools +to be injected into wrapper scripts: + make DYNINST_LIB=$dyninst_prefix/lib PREFIX=$afl_dyninst_prefix install ## Commandline options ``` -Usage: afl-dyninst -dfvxD -i binary -o binary -l library -e address -E address -s number -S funcname -I funcname -m size +Usage: afl-dyninst -vxD -i binary -o binary -e address -E address -s number -S funcname -I funcname -m size -i: input binary program -o: output binary program -r: runtime library to instrument (path to, repeat for more than one) @@ -75,21 +34,19 @@ Usage: afl-dyninst -dfvxD -i binary -o binary -l library -e address -E address -E: exit point - force exit(0) at this address (repeat for more than one) -s: number of initial basic blocks to skip in binary -m: minimum size of a basic bock to instrument (default: 10) - -f: try to fix a dyninst bug that leads to crashes (loss of 20%% performance, only required for dyninst9) -I: only instrument this function and nothing else (repeat for more than one) -S: do not instrument this function (repeat for more than one) -D: instrument only a simple fork server and also forced exit functions -x: experimental performance mode (~25-50% speed improvement) -v: verbose output - Note: options -l and -d have been deprecated, use -r and -D instead. ``` Switch -e is used to manualy specify the entry point where initialization callback is to be inserted. For unstipped binaries, afl-dyninst defaults -to using _init of the binary as an entry point. In case of stripped binaries +to using `_init` of the binary as an entry point. In case of stripped binaries this option is required and is best set to the address of main which can easily be determined by disassembling the binary and looking for an -argument to __libc_start_main. +argument to `__libc_start_main`. Switch -E is used to specify addresses that should force a clean exit when reached. This can speed up the fuzzing tremendously. @@ -109,12 +66,6 @@ instrumented ones to original name. Switch -m allows you to only instrument basic blocks of a minimum size - the default minimum size is 1 -Switch -f fixes a dyninst bug that lead to bugs in the instrumented program: -our basic block instrumentation function loaded into the instrumentd binaries -uses the edi/rdi. However dyninst does not always saves and restores it when -instrumenting that function leading to crashes and changed program behaviour -when the register is used for function parameters. - Switch -S allows you to not instrument specific functions. This options is mainly to hunt down bugs in dyninst. Can be specified multiple times. @@ -126,27 +77,18 @@ Can be specified multiple times. Switch -D installs the afl fork server and forced exit functions but no basic block instrumentation. That would serve no purpose - unless there are other tools that need that: - * [https://github.com/vanhauser-thc/afl-dynamorio](https://github.com/vanhauser-thc/afl-dynamorio) - * [https://github.com/vanhauser-thc/afl-pin](https://github.com/vanhauser-thc/afl-pin) +* [afl-dynamorio] +* [afl-pin] Switch -x enables an experimental performance mode (+25-50% speed). Just try it and if the target crashes too often, instrument again without this. Should not crash though. -Note that the -l option has been deprecated, use -r instead. - -Note that the -d option has been deprecated, use -D instead (or ignore the -o output file). - - ## Example of instrumenting a target binary -Dyninst requires DYNINSTAPI_RT_LIB environment variable to point to the location -of libdyninstAPI_RT.so. - ``` -$ export DYNINSTAPI_RT_LIB=/usr/local/lib/libdyninstAPI_RT.so $ ./afl-dyninst -i ./unrar -o ./rar_ins -e 0x4034c0 -x -Skipping library: libAflDyninst.so +Skipping library: libafldyninst.so Instrumenting module: DEFAULT_MODULE Inserting init callback. Saving the instrumented binary to ./unrar_ins... @@ -155,14 +97,7 @@ All done! Happy fuzzing! Here we are instrumenting the rar binary with entrypoint at 0x4034c0 (manually found address of main), skipping the first 10 basic blocks -and outputing to unrar_ins - -You can also use the afl-dyninst.sh helper script which sets the required -environment variables for you: -``` -$ ./afl-dyninst.sh -i ./unrar -o ./rar_ins -e 0x4034c0 -x -``` - +and outputing to `unrar_ins`. ## Running AFL on the instrumented binary @@ -180,11 +115,10 @@ Then, AFL can be run as usual: $ afl-fuzz -i testcases/archives/common/gzip/ -o test_gzip -- ./gzip_ins -d -c ``` -You can also use the afl-fuzz-dyninst.sh helper script which sets the required -environment variables for you. -``` -$ afl-fuzz-dyninst.sh -i testcases/archives/common/gzip/ -o test_gzip -- ./gzip_ins -d -c -``` +You can also use the afl-dyninst-env helper script +which sets the required environment variables for you. + + afl-dyninst-env afl-fuzz -i testcases/archives/common/gzip/ -o test_gzip -- ./gzip_ins -d -c ## Problems @@ -206,6 +140,21 @@ Solution: This happens if the target is using throw/catch, and dyninst's modification result in that the caught exception is not resetted and hence abort() is triggered. No solution to this issue is known yet. - Binary editing the target binary to perform _exit(0) would help though. + Binary editing the target binary + to perform `_exit(0)` would help though. + +## Copying + +AFL Dyninst is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +AFL Dyninst was originally developed as part of a project +with the Cisco Talos VULNDEV Team and released under the Apache License, +version 2.0. -More problems? Create an issue at [https://github.com/vanhauser-thc/afl-dyninst](https://github.com/vanhauser-thc/afl-dyninst) +[AFL++]: https://github.com/AFLplusplus/AFLplusplus +[Dyninst]: https://github.com/dyninst/dyninst +[afl-dynamorio]: https://github.com/vanhauser-thc/afl-dynamorio +[afl-pin]: https://github.com/vanhauser-thc/afl-pin diff --git a/README.md.license b/README.md.license new file mode 100644 index 0000000..e35a3a4 --- /dev/null +++ b/README.md.license @@ -0,0 +1,4 @@ +SPDX-FileCopyrightText: 2016 Aleksandar Nikolic +SPDX-FileCopyrightText: 2019-2021 Marc "van Hauser" Heuse +SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +SPDX-License-Identifier: Apache-2.0 diff --git a/afl-dyninst-env.m4 b/afl-dyninst-env.m4 new file mode 100644 index 0000000..98d6962 --- /dev/null +++ b/afl-dyninst-env.m4 @@ -0,0 +1,10 @@ +#!/bin/sh +# Environment setup (to afl-fuzz) the instrumented binary +# SPDX-FileCopyrightText: 2018-2021 Marc "van Hauser" Heuse +# SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +# SPDX-License-Identifier: Apache-2.0 +export LD_LIBRARY_PATH="AFL_DYNINST_LIB:DYNINST_LIB:$LD_LIBRARY_PATH" +export AFL_SKIP_BIN_CHECK=1 +export AFL_MAP_SIZE=65536 +$* +# vim: filetype=sh.m4 diff --git a/afl-dyninst.cc b/afl-dyninst.cc new file mode 100644 index 0000000..cb580d0 --- /dev/null +++ b/afl-dyninst.cc @@ -0,0 +1,693 @@ +// Binary instrumentation tool +// +// SPDX-FileCopyrightText: 2016 Aleksandar Nikolic +// SPDX-FileCopyrightText: 2018-2021 Marc "van Hauser" Heuse +// SPDX-License-Identifier: Apache-2.0 +// +// SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +// SPDX-License-Identifier: AGPL-3.0-or-later + +#include "afl-dyninst.h" + +// DyninstAPI includes +#include "BPatch.h" +#include "BPatch_flowGraph.h" +#include "BPatch_point.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +using namespace std; +using namespace Dyninst; + +// cmd line options +char *originalBinary; +char *instrumentedBinary; +char *entryPointName = NULL; +int verbose = 0; + +Dyninst::Address entryPoint; +set todo; +set instrumentLibraries; +set runtimeLibraries; +set skipAddresses; +set onlyAddresses; +set exitAddresses; +unsigned int bbMinSize = 10; +int bbSkip = 0, performance = 1; +bool skipMainModule = false, do_bb = true, dynfix = false; +unsigned long int insertions = 0; +uintptr_t mapaddr = 0; + +BPatch_function *save_rdi; +BPatch_function *restore_rdi; + +const char *functions[] = {"main", "_main", "_initproc", "_init", "start", "_start", NULL}; + +static const char *OPT_STR = "fi:o:l:e:E:vs:dr:m:S:I:Dx"; +static const char *USAGE = " -vxD -i -o -e
-E
-s -S -I -m \n \ + -i: input binary \n \ + -o: output binary\n \ + -r: runtime library to instrument (path to, repeat for more than one)\n \ + -e: entry point address to patch (required for stripped binaries)\n \ + -E: exit point - force exit(0) at this address (repeat for more than one)\n \ + -s: number of initial basic blocks to skip in binary\n \ + -m: minimum size of a basic bock to instrument (default: 10)\n \ + -I: only instrument this function and nothing else (repeat for more than one)\n \ + -S: do not instrument this function (repeat for more than one)\n \ + -D: instrument only a simple fork server and also forced exit functions\n \ + -x: experimental performance mode (~25-50% speed improvement)\n \ + -v: verbose output\n"; + +bool parseOptions(int argc, char **argv) { + int c; + + while ((c = getopt(argc, argv, OPT_STR)) != -1) { + switch ((char)c) { + case 'x': + performance++; + /* + if (performance == 3) { + #if ( __amd64__ || __x86_64__ ) + fprintf(stderr, "Warning: performance level 3 is currently totally experimental\n"); + #else + fprintf(stderr, "Warning: maximum performance level for non-intelx64 x86 is 2\n"); + performance = 2; + #endif + } else*/ + if (performance > 2) performance = 2; + break; + case 'I': + onlyAddresses.insert(optarg); + break; + case 'S': + skipAddresses.insert(optarg); + break; + case 'e': + if ((entryPoint = strtoul(optarg, NULL, 16)) < 0x1000) + entryPointName = optarg; + break; + case 'i': + originalBinary = optarg; + instrumentLibraries.insert(optarg); + break; + case 'o': + instrumentedBinary = optarg; + break; + case 'E': + exitAddresses.insert(strtoul(optarg, NULL, 16)); + break; + case 'r': + runtimeLibraries.insert(optarg); + break; + case 's': + bbSkip = atoi(optarg); + break; + case 'm': + bbMinSize = atoi(optarg); + break; + case 'D': + do_bb = false; + break; + case 'v': + verbose++; + break; + default: + cerr << "Usage: " << argv[0] << USAGE; + return false; + } + } + + if (originalBinary == NULL) { + cerr << "Input binary is required!" << endl; + cerr << "Usage: " << argv[0] << USAGE; + return false; + } + + if (instrumentedBinary == NULL) { + cerr << "Output binary is required!" << endl; + cerr << "Usage: " << argv[0] << USAGE; + return false; + } + + return true; +} + +BPatch_function *findFuncByName(BPatch_image *appImage, char *funcName) { + BPatch_Vector funcs; + + if (NULL == appImage->findFunction(funcName, funcs) || !funcs.size() || NULL == funcs[0]) { + cerr << "Failed to find " << funcName << " function." << endl; + return NULL; + } + + return funcs[0]; +} + +// insert callback to initialization function in the instrumentation library +// either at _init or at manualy specified entry point. +bool insertCallToInit(BPatch_addressSpace *appBin, BPatch_function *instIncFunc, BPatch_module *module, BPatch_function *funcInit, bool install_hack) { + /* Find the instrumentation points */ + vector points; + vector *funcEntry = funcInit->findPoint(BPatch_entry); + BPatch_image *appImage = appBin->getImage(); + BPatchSnippetHandle *handle; + + if (NULL == funcEntry) { + cerr << "Failed to find entry for function. " << endl; + return false; + } + + // THIS BLOCK IS DISABLED - dyninst is too volatile for this to work reliably + // disabled because performance can not be greater than 2 + if (performance >= 3 && install_hack == true) { + cout << "Inserting global variables" << endl; + // we set up a fake map so we do not have crashes if the the forkserver + // is not installed in _init but later for speed reasons. + // we could also check in the bb() code if map == 0 but that would + // cost precious instructions. + BPatch_variableExpr *fakemap = appBin->malloc(65536); + BPatch_constExpr fakemap_ptr(fakemap->getBaseAddr()); + BPatch_variableExpr *map = appBin->malloc(*(appImage->findType("size_t")), "map"); + BPatch_arithExpr initmap(BPatch_assign, *map, fakemap_ptr); + + appBin->insertSnippet(initmap, *funcEntry, BPatch_firstSnippet); + BPatch_constExpr map_ptr(map->getBaseAddr()); + BPatch_variableExpr *prev_id = appBin->malloc(*(appImage->findType("size_t")), "prev_id"); + BPatch_arithExpr initprevid(BPatch_assign, *prev_id, BPatch_constExpr(0)); + + appBin->insertSnippet(initprevid, *funcEntry); + BPatch_Vector instArgs; + cout << "Inserting init callback." << endl; + instArgs.push_back(&map_ptr); + BPatch_funcCallExpr instIncExpr(*instIncFunc, instArgs); + + handle = appBin->insertSnippet(instIncExpr, *funcEntry, BPatch_callBefore, BPatch_lastSnippet); + } else { + BPatch_Vector instArgs; + cout << "Inserting init callback." << endl; + BPatch_funcCallExpr instIncExpr(*instIncFunc, instArgs); + + handle = appBin->insertSnippet(instIncExpr, *funcEntry, BPatch_callBefore, BPatch_lastSnippet); + } + + if (!handle) { + cerr << "Failed to insert init callback." << endl; + return false; + } + return true; +} + +// inserts a callback for each basic block assigning it an instrumentation +// time 16bit random ID just as afl +bool insertBBCallback(BPatch_addressSpace *appBin, BPatch_function *curFunc, char *funcName, BPatch_function *instBBIncFunc, int *bbIndex) { + BPatch_image *appImage = appBin->getImage(); + BPatch_flowGraph *appCFG = curFunc->getCFG(); + unsigned short randID; + + if (!appCFG) { + cerr << "Failed to find CFG for function " << funcName << endl; + return false; + } + + BPatch_Set allBlocks; + if (!appCFG->getAllBasicBlocks(allBlocks)) { + cerr << "Failed to find basic blocks for function " << funcName << endl; + return false; + } else if (allBlocks.size() == 0) { + cerr << "No basic blocks for function " << funcName << endl; + return false; + } + + BPatch_Set::iterator iter; + for (iter = allBlocks.begin(); iter != allBlocks.end(); iter++) { + if (*bbIndex < bbSkip || (*iter)->size() < bbMinSize) { // skip over first bbSkip bbs or below minimum size + (*bbIndex)++; + continue; + } + + BPatch_point *bbEntry = (*iter)->findEntryPoint(); + + if (performance >= 1) { + if ((*iter)->isEntryBlock() == false) { + bool good = false; + + BPatch_Vector sources; + (*iter)->getSources(sources); + for (unsigned int i = 0; i < sources.size() && good == false; i++) { + BPatch_Vector targets; + sources[i]->getTargets(targets); + if (targets.size() > 1) + good = true; + } + if (good == false) + continue; + } + } + + unsigned long address = (*iter)->getStartAddress(); + + randID = rand() % USHRT_MAX; + if (verbose >= 1) { + cout << "Instrumenting Basic Block 0x" << hex << address << " of " << funcName << " with size " << dec << (*iter)->size() << " with random id " << randID << "/0x" << hex << randID << endl; + } + + if (NULL == bbEntry) { + // warn the user, but continue + cerr << "Failed to find entry for basic block at 0x" << hex << address << endl; + (*bbIndex)++; + continue; + } + + BPatchSnippetHandle *handle; + + // level 3 is disabled + if (performance >= 3) { + // these are dummy instructions we overwrite later + BPatch_variableExpr *pid = appImage->findVariable("prev_id"); + BPatch_arithExpr new_prev_id(BPatch_assign, *pid, BPatch_arithExpr(BPatch_divide, BPatch_constExpr(8), BPatch_constExpr(2))); + + handle = appBin->insertSnippet(new_prev_id, *bbEntry, BPatch_lastSnippet); + BPatch_variableExpr *map = appImage->findVariable("map"); + BPatch_variableExpr *pid2 = appImage->findVariable("prev_id"); + BPatch_arithExpr map_idx(BPatch_arithExpr(BPatch_plus, *map, BPatch_arithExpr(BPatch_divide, *pid2, BPatch_constExpr(2)))); + + if (mapaddr == 0) { + printf("Map for AFL is installed at: %p\n", (void *)map->getBaseAddr()); + mapaddr = (uintptr_t)map->getBaseAddr(); + } + handle = appBin->insertSnippet(map_idx, *bbEntry, BPatch_firstSnippet); + } else { + BPatch_Vector instArgs1; + BPatch_Vector instArgs; + BPatch_constExpr bbId(randID); + + instArgs.push_back(&bbId); + BPatch_funcCallExpr instIncExpr(*instBBIncFunc, instArgs); + + + handle = appBin->insertSnippet(instIncExpr, *bbEntry, BPatch_callBefore); + } + + if (!handle) { + // warn the user, but continue to next bb + cerr << "Failed to insert instrumention in basic block at 0x" << hex << address << endl; + (*bbIndex)++; + continue; + } else + insertions++; + + (*bbIndex)++; + } + + return true; +} + +int main(int argc, char **argv) { + char *func2patch = NULL; + int loop; + + if (argc < 3 || strncmp(argv[1], "-h", 2) == 0 || strncmp(argv[1], "--h", 3) == 0) { + cout << "Usage: " << argv[0] << USAGE; + return false; + } + + if (!parseOptions(argc, argv)) { + return EXIT_FAILURE; + } + + BPatch bpatch; + + if (performance >= 2) { + bpatch.setSaveFPR(false); + bpatch.setTrampRecursive(true); + } + + const char *dyninstapi_rt_lib_old = getenv("DYNINSTAPI_RT_LIB"); + if (setenv("DYNINSTAPI_RT_LIB", dyninstapi_rt_lib, true) != 0) { + cerr << "Failed to set DYNINSTAPI_RT_LIB\n"; // TODO: explain + return EXIT_FAILURE; + } + BPatch_addressSpace *appBin = bpatch.openBinary(originalBinary, instrumentLibraries.size() != 1); + if (dyninstapi_rt_lib_old == NULL) + unsetenv("DYNINSTAPI_RT_LIB"); + else + setenv("DYNINSTAPI_RT_LIB", dyninstapi_rt_lib_old, true); + if (appBin == NULL) { + cerr << "Failed to open binary" << endl; + return EXIT_FAILURE; + } + + BPatch_image *appImage = appBin->getImage(); + + // get and iterate over all modules, instrumenting only the default and manually specified ones + vector *modules = appImage->getModules(); + vector::iterator moduleIter; + vector *funcsInModule; + BPatch_module *defaultModule = NULL, *firstModule = NULL; + string defaultModuleName; + + // look for _init + if (defaultModuleName.empty()) { + for (loop = 0; functions[loop] != NULL && func2patch == NULL; loop++) { + for (moduleIter = modules->begin(); moduleIter != modules->end(); ++moduleIter) { + vector::iterator funcsIterator; + char moduleName[1024]; + + if (firstModule == NULL) + firstModule = (*moduleIter); + (*moduleIter)->getName(moduleName, 1024); + funcsInModule = (*moduleIter)->getProcedures(); + if (verbose >= 2) + cout << "Looking for init function " << functions[loop] << " in " << moduleName << endl; + for (funcsIterator = funcsInModule->begin(); funcsIterator != funcsInModule->end(); ++funcsIterator) { + char funcName[1024]; + + (*funcsIterator)->getName(funcName, 1024); + if (verbose >= 3 && loop == 0) + printf("module: %s function: %s\n", moduleName, funcName); + if (string(funcName) == string(functions[loop])) { + func2patch = (char *)functions[loop]; + defaultModuleName = string(moduleName); + defaultModule = (*moduleIter); + if (verbose >= 1) { + cout << "Found " << func2patch << " in " << moduleName << endl; + } + break; + } + } + if (!defaultModuleName.empty()) + break; + } + if (func2patch != NULL) + break; + } + } + // last resort, by name of the binary + if (defaultModuleName.empty()) + defaultModuleName = string(originalBinary).substr(string(originalBinary).find_last_of("\\/") + 1); + if (defaultModule == NULL) + defaultModule = firstModule; + + if (!appBin->loadLibrary(afl_dyninst_lib)) { + cerr << "Failed to open instrumentation library " << afl_dyninst_lib << endl; + cerr << "It needs to be located in the current working directory." << endl; + return EXIT_FAILURE; + } + + /* Find code coverage functions in the instrumentation library */ + BPatch_function *initAflForkServer; + + BPatch_function *bbCallback = findFuncByName(appImage, (char *)"bbCallback"); + BPatch_function *forceCleanExit = findFuncByName(appImage, (char *)"forceCleanExit"); + + if (do_bb == true) { + if (performance >= 3) + initAflForkServer = findFuncByName(appImage, (char *)"initAflForkServerVar"); + else + initAflForkServer = findFuncByName(appImage, (char *)"initAflForkServer"); + } else + initAflForkServer = findFuncByName(appImage, (char *)"initOnlyAflForkServer"); + + if (!initAflForkServer || !bbCallback || !forceCleanExit) { + cerr << "Instrumentation library lacks callbacks!" << endl; + return EXIT_FAILURE; + } + + int bbIndex = 0; + + // if an entrypoint was set then find function, else find _init + BPatch_function *funcToPatch = NULL; + + if (entryPoint == 0 && entryPointName == NULL) { + if (func2patch == NULL) { + cerr << "Couldn't locate _init, specify entry point manually with -e 0xaddr" << endl; + return EXIT_FAILURE; + } + BPatch_Vector funcs; + defaultModule->findFunction(func2patch, funcs); + if (!funcs.size()) { + cerr << "Couldn't locate _init, specify entry point manually with -e 0xaddr" << endl; + return EXIT_FAILURE; + } + // there should really be only one + funcToPatch = funcs[0]; + } else { + if (entryPointName != NULL) { + for (moduleIter = modules->begin(); moduleIter != modules->end() && funcToPatch == 0; ++moduleIter) { + BPatch_Vector funcs; + (*moduleIter)->findFunction(entryPointName, funcs); + if (funcs.size() > 0) { + char moduleName[1024]; + + funcToPatch = funcs[0]; + defaultModule = (*moduleIter); + defaultModule->getName(moduleName, 1024); + defaultModuleName = string(moduleName); + printf("Found entypoint %s in module %s\n", entryPointName, moduleName); + break; + } + } + } + if (!funcToPatch) { + if (verbose > 1) + printf("Looking for entrypoint %p\n", (char *)entryPoint); + funcToPatch = defaultModule->findFunctionByEntry(entryPoint); + if (!funcToPatch && defaultModule != firstModule) { + funcToPatch = firstModule->findFunctionByEntry(entryPoint); + if (funcToPatch) + defaultModule = firstModule; + } + if (!funcToPatch) { // ok lets go hardcore ... + if (verbose > 1) + printf("OK we did not find the entrypoint so far, lets dig deeper ...\n"); + for (moduleIter = modules->begin(); moduleIter != modules->end() && funcToPatch != NULL; ++moduleIter) { + vector::iterator funcsIterator; + funcToPatch = (*moduleIter)->findFunctionByEntry(entryPoint); + if (funcToPatch) + defaultModule = (*moduleIter); + } + } + if (funcToPatch && verbose >= 1) { + char moduleName[1024]; + + defaultModule->getName(moduleName, 1024); + defaultModuleName = string(moduleName); + printf("Found entypoint %p in module %s\n", (void *)entryPoint, moduleName); + } + } + } + if (!funcToPatch) { + cerr << "Couldn't locate function at given entry point. " << endl; + cerr << "Try: readelf -ls " << originalBinary << " | egrep 'Entry|FUNC.*GLOBAL.*DEFAULT' | egrep -v '@|UND'" << endl; + return EXIT_FAILURE; + } + if (!insertCallToInit(appBin, initAflForkServer, defaultModule, funcToPatch, true)) { + cerr << "Could not insert init callback at given entry point." << endl; + return EXIT_FAILURE; + } + + for (moduleIter = modules->begin(); moduleIter != modules->end(); ++moduleIter) { + char moduleName[1024]; + + (*moduleIter)->getName(moduleName, 1024); + if ((*moduleIter)->isSharedLib()) { + if (instrumentLibraries.find(moduleName) == instrumentLibraries.end() && string(moduleName).find(".so") != string::npos) { + cout << "Skipping library: " << moduleName << endl; + continue; + } + } + + if (string(moduleName).find(defaultModuleName) != string::npos) { + if (skipMainModule) + continue; + } + + if (do_bb == true) { + cout << "Instrumenting module: " << moduleName << endl; + vector *allFunctions = (*moduleIter)->getProcedures(); + vector::iterator funcIter; + // iterate over all functions in the module + for (funcIter = allFunctions->begin(); funcIter != allFunctions->end(); ++funcIter) { + BPatch_function *curFunc = *funcIter; + char funcName[1024]; + int do_patch = 1; + + curFunc->getName(funcName, 1024); + if (string(funcName) == string("_init") || string(funcName) == string("__libc_csu_init") || string(funcName) == string("_start")) { + if (verbose) + cout << "Skipping instrumenting function " << funcName << endl; + continue; // here's a bug on hlt // XXX: check what happens if removed + } + if (!skipAddresses.empty()) { + set::iterator saiter; + for (saiter = skipAddresses.begin(); saiter != skipAddresses.end() && do_patch == 1; saiter++) + if (*saiter == string(funcName)) + do_patch = 0; + if (do_patch == 0) { + cout << "Skipping instrumenting function " << funcName << endl; + continue; + } + } + if (!onlyAddresses.empty()) { + do_patch = 0; + set::iterator saiter; + for (saiter = onlyAddresses.begin(); saiter != onlyAddresses.end() && do_patch == 1; saiter++) + if (*saiter == string(funcName)) + do_patch = 1; + if (do_patch == 0) { + cout << "Skipping instrumenting function " << funcName << endl; + continue; + } + } + insertBBCallback(appBin, curFunc, funcName, bbCallback, &bbIndex); + } + } + } + + if (!exitAddresses.empty()) { + cout << "Instrumenting forced exit addresses." << endl; + set::iterator uliter; + + for (uliter = exitAddresses.begin(); uliter != exitAddresses.end(); uliter++) { + if (*uliter > 0 && (signed long)*uliter != -1) { + funcToPatch = defaultModule->findFunctionByEntry(*uliter); + if (!funcToPatch) { + cerr << "Could not find enty point 0x" << hex << *uliter << " (continuing)" << endl; + } else { + if (!insertCallToInit(appBin, forceCleanExit, defaultModule, funcToPatch, false)) + cerr << "Could not insert force clean exit callback at 0x" << hex << *uliter << " (continuing)" << endl; + } + } + } + } + + cout << "Saving the instrumented binary to " << instrumentedBinary << " ..." << endl; + // Output the instrumented binary + BPatch_binaryEdit *appBinr = dynamic_cast(appBin); + + if (!appBinr->writeFile(instrumentedBinary)) { + cerr << "Failed to write output file: " << instrumentedBinary << endl; + return EXIT_FAILURE; + } + todo.insert(instrumentedBinary); + + if (!runtimeLibraries.empty()) { + cout << "Instrumenting runtime libraries." << endl; + set::iterator rtLibIter; + for (rtLibIter = runtimeLibraries.begin(); rtLibIter != runtimeLibraries.end(); rtLibIter++) { + BPatch_addressSpace *libBin = bpatch.openBinary((*rtLibIter).c_str(), false); + + if (libBin == NULL) { + cerr << "Failed to open binary " << *rtLibIter << endl; + return EXIT_FAILURE; + } + BPatch_image *libImg = libBin->getImage(); + + vector *modules = libImg->getModules(); + moduleIter = modules->begin(); + for (; moduleIter != modules->end(); ++moduleIter) { + char moduleName[1024]; + + (*moduleIter)->getName(moduleName, 1024); + cout << "Instrumenting module: " << moduleName << endl; + vector *allFunctions = (*moduleIter)->getProcedures(); + vector::iterator funcIter; + // iterate over all functions in the module + for (funcIter = allFunctions->begin(); funcIter != allFunctions->end(); ++funcIter) { + BPatch_function *curFunc = *funcIter; + char funcName[1024]; + int do_patch = 1; + + curFunc->getName(funcName, 1024); + if (string(funcName) == string("_init") || string(funcName) == string("__libc_csu_init") || string(funcName) == string("_start")) + continue; + if (!skipAddresses.empty()) { + set::iterator saiter; + for (saiter = skipAddresses.begin(); saiter != skipAddresses.end() && do_patch == 1; saiter++) + if (*saiter == string(funcName)) + do_patch = 0; + if (do_patch == 0) { + cout << "Skipping instrumenting function " << funcName << endl; + continue; + } + } + + insertBBCallback(libBin, curFunc, funcName, bbCallback, &bbIndex); + } + } + appBinr = dynamic_cast(libBin); + if (!appBinr->writeFile((*rtLibIter + ".ins").c_str())) { + cerr << "Failed to write output file: " << (*rtLibIter + ".ins").c_str() << endl; + return EXIT_FAILURE; + } else { + cout << "Saved the instrumented library to " << (*rtLibIter + ".ins").c_str() << "." << endl; + todo.insert(*rtLibIter + ".ins"); + } + } + } + + printf("Did a total of %lu basic block insertions\n", insertions); + + if (performance >= 3) { + int fd; + struct stat st; + uint64_t i, found = 0; + unsigned char *ptr; + + unsigned char snip1[] = {0x00, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00}; + unsigned char snip2[] = {0x08, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00}; + unsigned char fullsnip[] = {0x53, 0x50, 0x41, 0x52, 0x48, 0xBB, 0x00, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8b, 0x03, 0x48, 0x85, 0xc0, 0x74, 0x28, 0x49, 0xBA, 0x08, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x41, 0x8b, 0x1a, 0x66, 0x81, 0xf3, 0x99, 0x99, 0x48, 0x0f, 0xb7, 0xdb, 0x80, 0x04, 0x18, 0x01, 0x66, 0x41, 0x8b, 0x1a, 0x66, 0xd1, 0xfb, 0x66, 0x41, 0x89, 0x1a, 0x41, 0x5a, 0x58, 0x5b, 0x90, 0x90, 0x90, 0x90}; + memcpy(snip1, (char *)&mapaddr, sizeof(mapaddr)); + memcpy(fullsnip + 6, (char *)&mapaddr, sizeof(mapaddr)); + mapaddr += sizeof(mapaddr); + memcpy(snip2, (char *)&mapaddr, sizeof(mapaddr)); + memcpy(fullsnip + 24, (char *)&mapaddr, sizeof(mapaddr)); + set::iterator fn; + for (fn = todo.begin(); fn != todo.end(); fn++) { + cout << "Reinstrumenting " << *fn << " ..." << endl; + if ((fd = open((const char *)(fn->c_str()), O_RDWR)) == -1 || fstat(fd, &st) != 0) { + cerr << "Error: file is gone: " << *fn << endl; + exit(-1); + } + if ((size_t)st.st_size < (size_t)sizeof(fullsnip)) { + cerr << "Error: somethings horrible wrong here with " << *fn << " ..." << endl; + continue; + } + ptr = (unsigned char *)mmap(NULL, st.st_size, PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0); + for (i = 2; i < (size_t)st.st_size - (size_t)sizeof(fullsnip); i++) { + if (memcmp(ptr + i, snip1, sizeof(snip1)) == 0 && memcmp(ptr + i + sizeof(snip1) + 4, snip2, sizeof(snip2)) == 0) { + found++; + fullsnip[0x27] = rand() % 256; + fullsnip[0x28] = rand() % 256; + memcpy(ptr + i - 2, fullsnip, sizeof(fullsnip)); + } + } + // printf("found %lu entries, snipsize %u\n", found, (unsigned int)sizeof(fullsnip)); + munmap((void *)ptr, st.st_size); + close(fd); + } + if (found == insertions) { + printf("SUCCESS! Performance level 3 succeeded :)\n"); + } else { + fprintf(stderr, "Error: can not complete performance level 3, could not find all insertions (%lu of %lu).\n", found, insertions); + exit(-1); + } + } + + cout << "All done! Happy fuzzing!" << endl; + return EXIT_SUCCESS; +} diff --git a/afl-dyninst.cpp b/afl-dyninst.cpp deleted file mode 100644 index 450d903..0000000 --- a/afl-dyninst.cpp +++ /dev/null @@ -1,732 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -// DyninstAPI includes -#include "BPatch.h" -#include "BPatch_addressSpace.h" -#include "BPatch_binaryEdit.h" -#include "BPatch_flowGraph.h" -#include "BPatch_function.h" -#include "BPatch_point.h" -#include "BPatch_process.h" -#include "dyninstversion.h" // if this include errors, compile and install https://github.com/dyninst/dyninst - -using namespace std; -using namespace Dyninst; - -// cmd line options -char *originalBinary; -char *instrumentedBinary; -char *entryPointName = NULL; -int verbose = 0; - -Dyninst::Address entryPoint; -set todo; -set instrumentLibraries; -set runtimeLibraries; -set skipAddresses; -set onlyAddresses; -set exitAddresses; -unsigned int bbMinSize = 10; -int bbSkip = 0, performance = 1; -bool skipMainModule = false, do_bb = true, dynfix = false; -unsigned long int insertions = 0; -uintptr_t mapaddr = 0; - -BPatch_function *save_rdi; -BPatch_function *restore_rdi; - -const char *functions[] = {"main", "_main", "_initproc", "_init", "start", "_start", NULL}; - -const char *instLibrary = "libAflDyninst.so"; - -static const char *OPT_STR = "fi:o:l:e:E:vs:dr:m:S:I:Dx"; -static const char *USAGE = " -fvxD -i -o -e
-E
-s -S -I -m \n \ - -i: input binary \n \ - -o: output binary\n \ - -r: runtime library to instrument (path to, repeat for more than one)\n \ - -e: entry point address to patch (required for stripped binaries)\n \ - -E: exit point - force exit(0) at this address (repeat for more than one)\n \ - -s: number of initial basic blocks to skip in binary\n \ - -m: minimum size of a basic bock to instrument (default: 10)\n \ - -f: fix a dyninst bug that leads to crashes (performance loss, only dyninst9)\n \ - -I: only instrument this function and nothing else (repeat for more than one)\n \ - -S: do not instrument this function (repeat for more than one)\n \ - -D: instrument only a simple fork server and also forced exit functions\n \ - -x: experimental performance mode (~25-50% speed improvement)\n \ - -v: verbose output\n \ - Note: options -l and -d have been deprecated, use -r and -D instead.\n"; - -bool parseOptions(int argc, char **argv) { - int c; - - while ((c = getopt(argc, argv, OPT_STR)) != -1) { - switch ((char)c) { - case 'x': - performance++; - /* - if (performance == 3) { - #if ( __amd64__ || __x86_64__ ) - fprintf(stderr, "Warning: performance level 3 is currently totally experimental\n"); - #else - fprintf(stderr, "Warning: maximum performance level for non-intelx64 x86 is 2\n"); - performance = 2; - #endif - } else*/ - if (performance > 2) performance = 2; - break; - case 'I': - onlyAddresses.insert(optarg); - break; - case 'S': - skipAddresses.insert(optarg); - break; - case 'e': - if ((entryPoint = strtoul(optarg, NULL, 16)) < 0x1000) - entryPointName = optarg; - break; - case 'i': - originalBinary = optarg; - instrumentLibraries.insert(optarg); - break; - case 'o': - instrumentedBinary = optarg; - break; - case 'l': - fprintf(stderr, "Error: option -l has been removed due implementation issues, dyninst behaviour and dyninst bugs. Please use -r.\n"); - exit(-1); - break; - case 'E': - exitAddresses.insert(strtoul(optarg, NULL, 16)); - break; - case 'r': - runtimeLibraries.insert(optarg); - break; - case 's': - bbSkip = atoi(optarg); - break; - case 'm': - bbMinSize = atoi(optarg); - break; - case 'd': - //skipMainModule = true; - fprintf(stderr, "Warning: option -d has been deprecated, use -D instead or ignore the generated -o file.\n"); - break; - case 'f': -#if (__amd64__ || __x86_64__) -#if (DYNINST_MAJOR_VERSION < 10) - dynfix = true; -#endif -#endif - break; - case 'D': - do_bb = false; - break; - case 'v': - verbose++; - break; - default: - cerr << "Usage: " << argv[0] << USAGE; - return false; - } - } - - if (originalBinary == NULL) { - cerr << "Input binary is required!" << endl; - cerr << "Usage: " << argv[0] << USAGE; - return false; - } - - if (instrumentedBinary == NULL) { - cerr << "Output binary is required!" << endl; - cerr << "Usage: " << argv[0] << USAGE; - return false; - } - - return true; -} - -BPatch_function *findFuncByName(BPatch_image *appImage, char *funcName) { - BPatch_Vector funcs; - - if (NULL == appImage->findFunction(funcName, funcs) || !funcs.size() || NULL == funcs[0]) { - cerr << "Failed to find " << funcName << " function." << endl; - return NULL; - } - - return funcs[0]; -} - -// insert callback to initialization function in the instrumentation library -// either at _init or at manualy specified entry point. -bool insertCallToInit(BPatch_addressSpace *appBin, BPatch_function *instIncFunc, BPatch_module *module, BPatch_function *funcInit, bool install_hack) { - /* Find the instrumentation points */ - vector points; - vector *funcEntry = funcInit->findPoint(BPatch_entry); - BPatch_image *appImage = appBin->getImage(); - BPatchSnippetHandle *handle; - - if (NULL == funcEntry) { - cerr << "Failed to find entry for function. " << endl; - return false; - } - - // THIS BLOCK IS DISABLED - dyninst is too volatile for this to work reliably - // disabled because performance can not be greater than 2 - if (performance >= 3 && install_hack == true) { - cout << "Inserting global variables" << endl; - // we set up a fake map so we do not have crashes if the the forkserver - // is not installed in _init but later for speed reasons. - // we could also check in the bb() code if map == 0 but that would - // cost precious instructions. - BPatch_variableExpr *fakemap = appBin->malloc(65536); - BPatch_constExpr fakemap_ptr(fakemap->getBaseAddr()); - BPatch_variableExpr *map = appBin->malloc(*(appImage->findType("size_t")), "map"); - BPatch_arithExpr initmap(BPatch_assign, *map, fakemap_ptr); - - appBin->insertSnippet(initmap, *funcEntry, BPatch_firstSnippet); - BPatch_constExpr map_ptr(map->getBaseAddr()); - BPatch_variableExpr *prev_id = appBin->malloc(*(appImage->findType("size_t")), "prev_id"); - BPatch_arithExpr initprevid(BPatch_assign, *prev_id, BPatch_constExpr(0)); - - appBin->insertSnippet(initprevid, *funcEntry); - BPatch_Vector instArgs; - cout << "Inserting init callback." << endl; - instArgs.push_back(&map_ptr); - BPatch_funcCallExpr instIncExpr(*instIncFunc, instArgs); - - handle = appBin->insertSnippet(instIncExpr, *funcEntry, BPatch_callBefore, BPatch_lastSnippet); - } else { - BPatch_Vector instArgs; - cout << "Inserting init callback." << endl; - BPatch_funcCallExpr instIncExpr(*instIncFunc, instArgs); - - handle = appBin->insertSnippet(instIncExpr, *funcEntry, BPatch_callBefore, BPatch_lastSnippet); - } - - if (!handle) { - cerr << "Failed to insert init callback." << endl; - return false; - } - return true; -} - -// inserts a callback for each basic block assigning it an instrumentation -// time 16bit random ID just as afl -bool insertBBCallback(BPatch_addressSpace *appBin, BPatch_function *curFunc, char *funcName, BPatch_function *instBBIncFunc, int *bbIndex) { - BPatch_image *appImage = appBin->getImage(); - BPatch_flowGraph *appCFG = curFunc->getCFG(); - unsigned short randID; - - if (!appCFG) { - cerr << "Failed to find CFG for function " << funcName << endl; - return false; - } - - BPatch_Set allBlocks; - if (!appCFG->getAllBasicBlocks(allBlocks)) { - cerr << "Failed to find basic blocks for function " << funcName << endl; - return false; - } else if (allBlocks.size() == 0) { - cerr << "No basic blocks for function " << funcName << endl; - return false; - } - - BPatch_Set::iterator iter; - for (iter = allBlocks.begin(); iter != allBlocks.end(); iter++) { - if (*bbIndex < bbSkip || (*iter)->size() < bbMinSize) { // skip over first bbSkip bbs or below minimum size - (*bbIndex)++; - continue; - } - - BPatch_point *bbEntry = (*iter)->findEntryPoint(); - - if (performance >= 1) { - if ((*iter)->isEntryBlock() == false) { - bool good = false; - - BPatch_Vector sources; - (*iter)->getSources(sources); - for (unsigned int i = 0; i < sources.size() && good == false; i++) { - BPatch_Vector targets; - sources[i]->getTargets(targets); - if (targets.size() > 1) - good = true; - } - if (good == false) - continue; - } - } - - unsigned long address = (*iter)->getStartAddress(); - - randID = rand() % USHRT_MAX; - if (verbose >= 1) { - cout << "Instrumenting Basic Block 0x" << hex << address << " of " << funcName << " with size " << dec << (*iter)->size() << " with random id " << randID << "/0x" << hex << randID << endl; - } - - if (NULL == bbEntry) { - // warn the user, but continue - cerr << "Failed to find entry for basic block at 0x" << hex << address << endl; - (*bbIndex)++; - continue; - } - - BPatchSnippetHandle *handle; - - // level 3 is disabled - if (performance >= 3) { - // these are dummy instructions we overwrite later - BPatch_variableExpr *pid = appImage->findVariable("prev_id"); - BPatch_arithExpr new_prev_id(BPatch_assign, *pid, BPatch_arithExpr(BPatch_divide, BPatch_constExpr(8), BPatch_constExpr(2))); - - handle = appBin->insertSnippet(new_prev_id, *bbEntry, BPatch_lastSnippet); - BPatch_variableExpr *map = appImage->findVariable("map"); - BPatch_variableExpr *pid2 = appImage->findVariable("prev_id"); - BPatch_arithExpr map_idx(BPatch_arithExpr(BPatch_plus, *map, BPatch_arithExpr(BPatch_divide, *pid2, BPatch_constExpr(2)))); - - if (mapaddr == 0) { - printf("Map for AFL is installed at: %p\n", (void *)map->getBaseAddr()); - mapaddr = (uintptr_t)map->getBaseAddr(); - } - handle = appBin->insertSnippet(map_idx, *bbEntry, BPatch_firstSnippet); - } else { - BPatch_Vector instArgs1; - BPatch_Vector instArgs; - BPatch_constExpr bbId(randID); - - instArgs.push_back(&bbId); -#if (DYNINST_MAJOR_VERSION < 10) - BPatch_funcCallExpr instIncExpr1(*save_rdi, instArgs1); - BPatch_funcCallExpr instIncExpr3(*restore_rdi, instArgs1); -#endif - BPatch_funcCallExpr instIncExpr(*instBBIncFunc, instArgs); - - -#if (DYNINST_MAJOR_VERSION < 10) - if (dynfix == true) - handle = appBin->insertSnippet(instIncExpr1, *bbEntry, BPatch_callBefore, BPatch_firstSnippet); -#endif - handle = appBin->insertSnippet(instIncExpr, *bbEntry, BPatch_callBefore); -#if (DYNINST_MAJOR_VERSION < 10) - if (dynfix == true) - handle = appBin->insertSnippet(instIncExpr3, *bbEntry, BPatch_callBefore, BPatch_lastSnippet); -#endif - } - - if (!handle) { - // warn the user, but continue to next bb - cerr << "Failed to insert instrumention in basic block at 0x" << hex << address << endl; - (*bbIndex)++; - continue; - } else - insertions++; - - (*bbIndex)++; - } - - return true; -} - -int main(int argc, char **argv) { - char *func2patch = NULL; - int loop; - - cout << "afl-dyninst (c) 2017-2021 by Aleksandar Nikolic and Marc Heuse [https://github.com/vanhauser-thc/afl-dyninst] Apache 2.0 License" << endl; - - if (argc < 3 || strncmp(argv[1], "-h", 2) == 0 || strncmp(argv[1], "--h", 3) == 0) { - cout << "Usage: " << argv[0] << USAGE; - return false; - } - - if (!parseOptions(argc, argv)) { - return EXIT_FAILURE; - } -#if (__amd64__ || __x86_64__) - if (do_bb == true) { - if (DYNINST_MAJOR_VERSION < 9 || (DYNINST_MAJOR_VERSION == 9 && DYNINST_MINOR_VERSION < 3) || (DYNINST_MAJOR_VERSION == 9 && DYNINST_MINOR_VERSION == 3 && DYNINST_PATCH_VERSION <= 2)) { - if (dynfix == false) - fprintf(stderr, "Warning: your dyninst version does not include a critical fix, you should use the -f option!\n"); - } else { - if (dynfix == true) - fprintf(stderr, "Notice: your dyninst version is fixed, the -f option should not be necessary.\n"); - } - } -#endif - - BPatch bpatch; - - if (performance >= 2) { - bpatch.setSaveFPR(false); - bpatch.setTrampRecursive(true); - } - - BPatch_addressSpace *appBin = bpatch.openBinary(originalBinary, instrumentLibraries.size() != 1); - - if (appBin == NULL) { - cerr << "Failed to open binary" << endl; - return EXIT_FAILURE; - } - - BPatch_image *appImage = appBin->getImage(); - - // get and iterate over all modules, instrumenting only the default and manually specified ones - vector *modules = appImage->getModules(); - vector::iterator moduleIter; - vector *funcsInModule; - BPatch_module *defaultModule = NULL, *firstModule = NULL; - string defaultModuleName; - - // look for _init - if (defaultModuleName.empty()) { - for (loop = 0; functions[loop] != NULL && func2patch == NULL; loop++) { - for (moduleIter = modules->begin(); moduleIter != modules->end(); ++moduleIter) { - vector::iterator funcsIterator; - char moduleName[1024]; - - if (firstModule == NULL) - firstModule = (*moduleIter); - (*moduleIter)->getName(moduleName, 1024); - funcsInModule = (*moduleIter)->getProcedures(); - if (verbose >= 2) - cout << "Looking for init function " << functions[loop] << " in " << moduleName << endl; - for (funcsIterator = funcsInModule->begin(); funcsIterator != funcsInModule->end(); ++funcsIterator) { - char funcName[1024]; - - (*funcsIterator)->getName(funcName, 1024); - if (verbose >= 3 && loop == 0) - printf("module: %s function: %s\n", moduleName, funcName); - if (string(funcName) == string(functions[loop])) { - func2patch = (char *)functions[loop]; - defaultModuleName = string(moduleName); - defaultModule = (*moduleIter); - if (verbose >= 1) { - cout << "Found " << func2patch << " in " << moduleName << endl; - } - break; - } - } - if (!defaultModuleName.empty()) - break; - } - if (func2patch != NULL) - break; - } - } - // last resort, by name of the binary - if (defaultModuleName.empty()) - defaultModuleName = string(originalBinary).substr(string(originalBinary).find_last_of("\\/") + 1); - if (defaultModule == NULL) - defaultModule = firstModule; - - if (!appBin->loadLibrary(instLibrary)) { - cerr << "Failed to open instrumentation library " << instLibrary << endl; - cerr << "It needs to be located in the current working directory." << endl; - return EXIT_FAILURE; - } - - /* Find code coverage functions in the instrumentation library */ - BPatch_function *initAflForkServer; - -#if (DYNINST_MAJOR_VERSION < 10) - save_rdi = findFuncByName(appImage, (char *)"save_rdi"); - restore_rdi = findFuncByName(appImage, (char *)"restore_rdi"); -#endif - BPatch_function *bbCallback = findFuncByName(appImage, (char *)"bbCallback"); - BPatch_function *forceCleanExit = findFuncByName(appImage, (char *)"forceCleanExit"); - - if (do_bb == true) { - if (performance >= 3) - initAflForkServer = findFuncByName(appImage, (char *)"initAflForkServerVar"); - else - initAflForkServer = findFuncByName(appImage, (char *)"initAflForkServer"); - } else - initAflForkServer = findFuncByName(appImage, (char *)"initOnlyAflForkServer"); - - if (!initAflForkServer || !bbCallback || !forceCleanExit -#if (DYNINST_MAJOR_VERSION < 10) - || !save_rdi || !restore_rdi -#endif - ) { - cerr << "Instrumentation library lacks callbacks!" << endl; - return EXIT_FAILURE; - } - - int bbIndex = 0; - - // if an entrypoint was set then find function, else find _init - BPatch_function *funcToPatch = NULL; - - if (entryPoint == 0 && entryPointName == NULL) { - if (func2patch == NULL) { - cerr << "Couldn't locate _init, specify entry point manually with -e 0xaddr" << endl; - return EXIT_FAILURE; - } - BPatch_Vector funcs; - defaultModule->findFunction(func2patch, funcs); - if (!funcs.size()) { - cerr << "Couldn't locate _init, specify entry point manually with -e 0xaddr" << endl; - return EXIT_FAILURE; - } - // there should really be only one - funcToPatch = funcs[0]; - } else { - if (entryPointName != NULL) { - for (moduleIter = modules->begin(); moduleIter != modules->end() && funcToPatch == 0; ++moduleIter) { - BPatch_Vector funcs; - (*moduleIter)->findFunction(entryPointName, funcs); - if (funcs.size() > 0) { - char moduleName[1024]; - - funcToPatch = funcs[0]; - defaultModule = (*moduleIter); - defaultModule->getName(moduleName, 1024); - defaultModuleName = string(moduleName); - printf("Found entypoint %s in module %s\n", entryPointName, moduleName); - break; - } - } - } - if (!funcToPatch) { - if (verbose > 1) - printf("Looking for entrypoint %p\n", (char *)entryPoint); - funcToPatch = defaultModule->findFunctionByEntry(entryPoint); - if (!funcToPatch && defaultModule != firstModule) { - funcToPatch = firstModule->findFunctionByEntry(entryPoint); - if (funcToPatch) - defaultModule = firstModule; - } - if (!funcToPatch) { // ok lets go hardcore ... - if (verbose > 1) - printf("OK we did not find the entrypoint so far, lets dig deeper ...\n"); - for (moduleIter = modules->begin(); moduleIter != modules->end() && funcToPatch != NULL; ++moduleIter) { - vector::iterator funcsIterator; - funcToPatch = (*moduleIter)->findFunctionByEntry(entryPoint); - if (funcToPatch) - defaultModule = (*moduleIter); - } - } - if (funcToPatch && verbose >= 1) { - char moduleName[1024]; - - defaultModule->getName(moduleName, 1024); - defaultModuleName = string(moduleName); - printf("Found entypoint %p in module %s\n", (void *)entryPoint, moduleName); - } - } - } - if (!funcToPatch) { - cerr << "Couldn't locate function at given entry point. " << endl; - cerr << "Try: readelf -ls " << originalBinary << " | egrep 'Entry|FUNC.*GLOBAL.*DEFAULT' | egrep -v '@|UND'" << endl; - return EXIT_FAILURE; - } - if (!insertCallToInit(appBin, initAflForkServer, defaultModule, funcToPatch, true)) { - cerr << "Could not insert init callback at given entry point." << endl; - return EXIT_FAILURE; - } - - for (moduleIter = modules->begin(); moduleIter != modules->end(); ++moduleIter) { - char moduleName[1024]; - - (*moduleIter)->getName(moduleName, 1024); - if ((*moduleIter)->isSharedLib()) { - if (instrumentLibraries.find(moduleName) == instrumentLibraries.end() && string(moduleName).find(".so") != string::npos) { - cout << "Skipping library: " << moduleName << endl; - continue; - } - } - - if (string(moduleName).find(defaultModuleName) != string::npos) { - if (skipMainModule) - continue; - } - - if (do_bb == true) { - cout << "Instrumenting module: " << moduleName << endl; - vector *allFunctions = (*moduleIter)->getProcedures(); - vector::iterator funcIter; - // iterate over all functions in the module - for (funcIter = allFunctions->begin(); funcIter != allFunctions->end(); ++funcIter) { - BPatch_function *curFunc = *funcIter; - char funcName[1024]; - int do_patch = 1; - - curFunc->getName(funcName, 1024); - if (string(funcName) == string("_init") || string(funcName) == string("__libc_csu_init") || string(funcName) == string("_start")) { - if (verbose) - cout << "Skipping instrumenting function " << funcName << endl; - continue; // here's a bug on hlt // XXX: check what happens if removed - } - if (!skipAddresses.empty()) { - set::iterator saiter; - for (saiter = skipAddresses.begin(); saiter != skipAddresses.end() && do_patch == 1; saiter++) - if (*saiter == string(funcName)) - do_patch = 0; - if (do_patch == 0) { - cout << "Skipping instrumenting function " << funcName << endl; - continue; - } - } - if (!onlyAddresses.empty()) { - do_patch = 0; - set::iterator saiter; - for (saiter = onlyAddresses.begin(); saiter != onlyAddresses.end() && do_patch == 1; saiter++) - if (*saiter == string(funcName)) - do_patch = 1; - if (do_patch == 0) { - cout << "Skipping instrumenting function " << funcName << endl; - continue; - } - } - insertBBCallback(appBin, curFunc, funcName, bbCallback, &bbIndex); - } - } - } - - if (!exitAddresses.empty()) { - cout << "Instrumenting forced exit addresses." << endl; - set::iterator uliter; - - for (uliter = exitAddresses.begin(); uliter != exitAddresses.end(); uliter++) { - if (*uliter > 0 && (signed long)*uliter != -1) { - funcToPatch = defaultModule->findFunctionByEntry(*uliter); - if (!funcToPatch) { - cerr << "Could not find enty point 0x" << hex << *uliter << " (continuing)" << endl; - } else { - if (!insertCallToInit(appBin, forceCleanExit, defaultModule, funcToPatch, false)) - cerr << "Could not insert force clean exit callback at 0x" << hex << *uliter << " (continuing)" << endl; - } - } - } - } - - cout << "Saving the instrumented binary to " << instrumentedBinary << " ..." << endl; - // Output the instrumented binary - BPatch_binaryEdit *appBinr = dynamic_cast(appBin); - - if (!appBinr->writeFile(instrumentedBinary)) { - cerr << "Failed to write output file: " << instrumentedBinary << endl; - return EXIT_FAILURE; - } - todo.insert(instrumentedBinary); - - if (!runtimeLibraries.empty()) { - cout << "Instrumenting runtime libraries." << endl; - set::iterator rtLibIter; - for (rtLibIter = runtimeLibraries.begin(); rtLibIter != runtimeLibraries.end(); rtLibIter++) { - BPatch_addressSpace *libBin = bpatch.openBinary((*rtLibIter).c_str(), false); - - if (libBin == NULL) { - cerr << "Failed to open binary " << *rtLibIter << endl; - return EXIT_FAILURE; - } - BPatch_image *libImg = libBin->getImage(); - - vector *modules = libImg->getModules(); - moduleIter = modules->begin(); - for (; moduleIter != modules->end(); ++moduleIter) { - char moduleName[1024]; - - (*moduleIter)->getName(moduleName, 1024); - cout << "Instrumenting module: " << moduleName << endl; - vector *allFunctions = (*moduleIter)->getProcedures(); - vector::iterator funcIter; - // iterate over all functions in the module - for (funcIter = allFunctions->begin(); funcIter != allFunctions->end(); ++funcIter) { - BPatch_function *curFunc = *funcIter; - char funcName[1024]; - int do_patch = 1; - - curFunc->getName(funcName, 1024); - if (string(funcName) == string("_init") || string(funcName) == string("__libc_csu_init") || string(funcName) == string("_start")) - continue; - if (!skipAddresses.empty()) { - set::iterator saiter; - for (saiter = skipAddresses.begin(); saiter != skipAddresses.end() && do_patch == 1; saiter++) - if (*saiter == string(funcName)) - do_patch = 0; - if (do_patch == 0) { - cout << "Skipping instrumenting function " << funcName << endl; - continue; - } - } - - insertBBCallback(libBin, curFunc, funcName, bbCallback, &bbIndex); - } - } - appBinr = dynamic_cast(libBin); - if (!appBinr->writeFile((*rtLibIter + ".ins").c_str())) { - cerr << "Failed to write output file: " << (*rtLibIter + ".ins").c_str() << endl; - return EXIT_FAILURE; - } else { - cout << "Saved the instrumented library to " << (*rtLibIter + ".ins").c_str() << "." << endl; - todo.insert(*rtLibIter + ".ins"); - } - } - } - - printf("Did a total of %lu basic block insertions\n", insertions); - - if (performance >= 3) { - int fd; - struct stat st; - uint64_t i, found = 0; - unsigned char *ptr; - - unsigned char snip1[] = {0x00, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00}; - unsigned char snip2[] = {0x08, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00}; - unsigned char fullsnip[] = {0x53, 0x50, 0x41, 0x52, 0x48, 0xBB, 0x00, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8b, 0x03, 0x48, 0x85, 0xc0, 0x74, 0x28, 0x49, 0xBA, 0x08, 0x00, 0x71, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x41, 0x8b, 0x1a, 0x66, 0x81, 0xf3, 0x99, 0x99, 0x48, 0x0f, 0xb7, 0xdb, 0x80, 0x04, 0x18, 0x01, 0x66, 0x41, 0x8b, 0x1a, 0x66, 0xd1, 0xfb, 0x66, 0x41, 0x89, 0x1a, 0x41, 0x5a, 0x58, 0x5b, 0x90, 0x90, 0x90, 0x90}; - memcpy(snip1, (char *)&mapaddr, sizeof(mapaddr)); - memcpy(fullsnip + 6, (char *)&mapaddr, sizeof(mapaddr)); - mapaddr += sizeof(mapaddr); - memcpy(snip2, (char *)&mapaddr, sizeof(mapaddr)); - memcpy(fullsnip + 24, (char *)&mapaddr, sizeof(mapaddr)); - set::iterator fn; - for (fn = todo.begin(); fn != todo.end(); fn++) { - cout << "Reinstrumenting " << *fn << " ..." << endl; - if ((fd = open((const char *)(fn->c_str()), O_RDWR)) == -1 || fstat(fd, &st) != 0) { - cerr << "Error: file is gone: " << *fn << endl; - exit(-1); - } - if ((size_t)st.st_size < (size_t)sizeof(fullsnip)) { - cerr << "Error: somethings horrible wrong here with " << *fn << " ..." << endl; - continue; - } - ptr = (unsigned char *)mmap(NULL, st.st_size, PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0); - for (i = 2; i < (size_t)st.st_size - (size_t)sizeof(fullsnip); i++) { - if (memcmp(ptr + i, snip1, sizeof(snip1)) == 0 && memcmp(ptr + i + sizeof(snip1) + 4, snip2, sizeof(snip2)) == 0) { - found++; - fullsnip[0x27] = rand() % 256; - fullsnip[0x28] = rand() % 256; - memcpy(ptr + i - 2, fullsnip, sizeof(fullsnip)); - } - } - // printf("found %lu entries, snipsize %u\n", found, (unsigned int)sizeof(fullsnip)); - munmap((void *)ptr, st.st_size); - close(fd); - } - if (found == insertions) { - printf("SUCCESS! Performance level 3 succeeded :)\n"); - } else { - fprintf(stderr, "Error: can not complete performance level 3, could not find all insertions (%lu of %lu).\n", found, insertions); - exit(-1); - } - } - - cout << "All done! Happy fuzzing!" << endl; - return EXIT_SUCCESS; -} diff --git a/afl-dyninst.h.m4 b/afl-dyninst.h.m4 new file mode 100644 index 0000000..7147c6c --- /dev/null +++ b/afl-dyninst.h.m4 @@ -0,0 +1,11 @@ +/* + * Instrumentation library path injection + * SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong + * SPDX-License-Identifier: AGPL-3.0-or-later + * vim: filetype=c.m4 + */ +#ifndef AFL_DYNINST_H +#define AFL_DYNINST_H +const char *const afl_dyninst_lib = "AFL_DYNINST_LIB/libafldyninst.so"; +const char *const dyninstapi_rt_lib = "DYNINST_LIB/libdyninstAPI_RT.so"; +#endif /* AFL_DYNINST_H */ diff --git a/afl-dyninst.sh b/afl-dyninst.sh deleted file mode 100755 index dd7d747..0000000 --- a/afl-dyninst.sh +++ /dev/null @@ -1,3 +0,0 @@ -#!/bin/sh -export DYNINSTAPI_RT_LIB=/usr/local/lib/libdyninstAPI_RT.so -afl-dyninst $* diff --git a/afl-fuzz-dyninst.sh b/afl-fuzz-dyninst.sh deleted file mode 100755 index 3a2ddcf..0000000 --- a/afl-fuzz-dyninst.sh +++ /dev/null @@ -1,14 +0,0 @@ -#!/bin/bash -test -z "$1" -o "$1" = "-h" && { echo Syntax: $0 afl-fuzz-options ; echo sets the afl-dyninst environment variables ; exit 1 ; } -# -# remember to run afl-system-config ! -# -export AFL_SKIP_BIN_CHECK=1 -export AFL_MAP_SIZE=65536 -export DYNINSTAPI_RT_LIB=/usr/local/lib/libdyninstAPI_RT.so -export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib:. -echo " $*" | grep -q " -m" || { echo "Warning: no -m memory option specified!" ; sleep 1 ; } -#export AFL_EXIT_WHEN_DONE=1 -#export AFL_TMPDIR=/run/$$ -#export AFL_PRELOAD=./desock.so:./libdislocator/libdislocator.so -afl-fuzz $* diff --git a/libAflDyninst.cpp b/libAflDyninst.cpp deleted file mode 100644 index fca9557..0000000 --- a/libAflDyninst.cpp +++ /dev/null @@ -1,211 +0,0 @@ -#include "config.h" // do symlink: ln -s ../AFLplusplus/include afl -#include "types.h" // Also needed via symlink for newer AFL versions -#include "dyninstversion.h" // if this include errors, compile and install https://github.com/dyninst/dyninst -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -using namespace std; - -static u8 dummy[65536]; -static u8 *__afl_area_ptr = dummy; // this saves a test + jz instruction -static s32 shm_id; -static int __afl_temp_data; -static pid_t __afl_fork_pid; -static unsigned short int prev_id = 0; -static bool forkserver_installed = false; -#if (__amd64__ || __x86_64__) -#if (DYNINST_MAJOR_VERSION < 10) -static long saved_di; -register long rdi asm("di"); // the warning is fine - we need the warning because of a bug in dyninst9 -#endif -#endif - -#define PRINT_ERROR(string) (void)(write(2, string, strlen(string)) + 1) // the (...+1) weirdness is so we do not get an ignoring return value warning - -void initAflForkServer() { - if (forkserver_installed == true) - return; - forkserver_installed = true; - - // we can not use fprint* stdout/stderr functions here, it fucks up some programs - char *shm_env_var = getenv(SHM_ENV_VAR); - - if (!shm_env_var) { - PRINT_ERROR("Error getting shm\n"); - return; - } - shm_id = atoi(shm_env_var); - __afl_area_ptr = (u8 *)shmat(shm_id, NULL, 0); - if (__afl_area_ptr == (u8 *)-1) { - PRINT_ERROR("Error: shmat\n"); - return; - } - // enter fork() server thyme! - int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - - if (n != 4) { - PRINT_ERROR("Error writing fork server\n"); - return; - } - while (1) { - n = read(FORKSRV_FD, &__afl_temp_data, 4); - if (n != 4) { - PRINT_ERROR("Error reading fork server\n"); - return; - } - - __afl_fork_pid = fork(); - if (__afl_fork_pid < 0) { - PRINT_ERROR("Error on fork()\n"); - return; - } - if (__afl_fork_pid == 0) { - close(FORKSRV_FD); - close(FORKSRV_FD + 1); - prev_id = 0; - break; - } else { - // parrent stuff - n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); - pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); - - if (temp_pid == 0) { - return; - } - n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - } - } -} - -// Should be called on basic block entry -void bbCallback(unsigned short id) { - __afl_area_ptr[prev_id ^ id]++; - prev_id = id >> 1; -} - -void forceCleanExit() { exit(0); } - -#if (DYNINST_MAJOR_VERSION < 10) -void save_rdi() { -#if __amd64__ || __x86_64__ - saved_di = rdi; -#endif -} - -void restore_rdi() { -#if __amd64__ || __x86_64__ - rdi = saved_di; -#endif -} -#endif - -void initOnlyAflForkServer() { - if (forkserver_installed == true) - return; - forkserver_installed = true; - - // enter fork() server thyme! - int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - - if (n != 4) { - PRINT_ERROR("Error writting fork server\n"); - return; - } - while (1) { - n = read(FORKSRV_FD, &__afl_temp_data, 4); - if (n != 4) { - PRINT_ERROR("Error reading fork server\n"); - return; - } - - __afl_fork_pid = fork(); - if (__afl_fork_pid < 0) { - PRINT_ERROR("Error on fork()\n"); - return; - } - if (__afl_fork_pid == 0) { - close(FORKSRV_FD); - close(FORKSRV_FD + 1); - prev_id = 0; - break; - } else { - // parrent stuff - n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); - pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); - - if (temp_pid == 0) { - return; - } - n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - } - } -} - -void initAflForkServerVar(u8 *map) { - // we can not use fprint* stdout/stderr functions here, it fucks up some programs - if (forkserver_installed == true) - return; - forkserver_installed = true; - - u8 **ptr = (u8 **)map; - char *shm_env_var = getenv(SHM_ENV_VAR); - if (!shm_env_var) { - char buf[256]; - PRINT_ERROR("Error getting shm\n"); - snprintf(buf, sizeof(buf), "__afl_area_ptr: %p\n", ptr); - PRINT_ERROR(buf); - return; - } - - shm_id = atoi(shm_env_var); - *ptr = (u8 *)shmat(shm_id, NULL, 0); - if ((u8 *)*ptr == (u8 *)-1) { - PRINT_ERROR("Error: shmat\n"); - return; - } - // enter fork() server thyme! - int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - - if (n != 4) { - PRINT_ERROR("Error writing fork server\n"); - return; - } - while (1) { - n = read(FORKSRV_FD, &__afl_temp_data, 4); - if (n != 4) { - PRINT_ERROR("Error reading fork server\n"); - return; - } - - __afl_fork_pid = fork(); - if (__afl_fork_pid < 0) { - PRINT_ERROR("Error on fork()\n"); - return; - } - if (__afl_fork_pid == 0) { - close(FORKSRV_FD); - close(FORKSRV_FD + 1); - prev_id = 0; - break; - } else { - // parrent stuff - n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); - pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); - - if (temp_pid == 0) { - return; - } - n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); - } - } -} diff --git a/libafldyninst.cc b/libafldyninst.cc new file mode 100644 index 0000000..2919c5c --- /dev/null +++ b/libafldyninst.cc @@ -0,0 +1,200 @@ +// Instrumentation library +// +// SPDX-FileCopyrightText: 2016 Aleksandar Nikolic +// SPDX-FileCopyrightText: 2018, 2020, 2021 Marc "van Hauser" Heuse +// SPDX-License-Identifier: Apache-2.0 +// +// SPDX-FileCopyrightText: 2024 Nguyễn Gia Phong +// SPDX-License-Identifier: AGPL-3.0-or-later + +#include "afl/config.h" +#include "afl/types.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +using namespace std; + +static u8 dummy[65536]; +static u8 *__afl_area_ptr = dummy; // this saves a test + jz instruction +static s32 shm_id; +static int __afl_temp_data; +static pid_t __afl_fork_pid; +static unsigned short int prev_id = 0; +static bool forkserver_installed = false; + +#define PRINT_ERROR(string) (void)(write(2, string, strlen(string)) + 1) // the (...+1) weirdness is so we do not get an ignoring return value warning + +void initAflForkServer() { + if (forkserver_installed == true) + return; + forkserver_installed = true; + + // we can not use fprint* stdout/stderr functions here, it fucks up some programs + char *shm_env_var = getenv(SHM_ENV_VAR); + + if (!shm_env_var) { + PRINT_ERROR("Error getting shm\n"); + return; + } + shm_id = atoi(shm_env_var); + __afl_area_ptr = (u8 *)shmat(shm_id, NULL, 0); + if (__afl_area_ptr == (u8 *)-1) { + PRINT_ERROR("Error: shmat\n"); + return; + } + // enter fork() server thyme! + int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + + if (n != 4) { + PRINT_ERROR("Error writing fork server\n"); + return; + } + while (1) { + n = read(FORKSRV_FD, &__afl_temp_data, 4); + if (n != 4) { + PRINT_ERROR("Error reading fork server\n"); + return; + } + + __afl_fork_pid = fork(); + if (__afl_fork_pid < 0) { + PRINT_ERROR("Error on fork()\n"); + return; + } + if (__afl_fork_pid == 0) { + close(FORKSRV_FD); + close(FORKSRV_FD + 1); + prev_id = 0; + break; + } else { + // parrent stuff + n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); + pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); + + if (temp_pid == 0) { + return; + } + n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + } + } +} + +// Should be called on basic block entry +void bbCallback(unsigned short id) { + __afl_area_ptr[prev_id ^ id]++; + prev_id = id >> 1; +} + +void forceCleanExit() { exit(0); } + +void initOnlyAflForkServer() { + if (forkserver_installed == true) + return; + forkserver_installed = true; + + // enter fork() server thyme! + int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + + if (n != 4) { + PRINT_ERROR("Error writting fork server\n"); + return; + } + while (1) { + n = read(FORKSRV_FD, &__afl_temp_data, 4); + if (n != 4) { + PRINT_ERROR("Error reading fork server\n"); + return; + } + + __afl_fork_pid = fork(); + if (__afl_fork_pid < 0) { + PRINT_ERROR("Error on fork()\n"); + return; + } + if (__afl_fork_pid == 0) { + close(FORKSRV_FD); + close(FORKSRV_FD + 1); + prev_id = 0; + break; + } else { + // parrent stuff + n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); + pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); + + if (temp_pid == 0) { + return; + } + n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + } + } +} + +void initAflForkServerVar(u8 *map) { + // we can not use fprint* stdout/stderr functions here, it fucks up some programs + if (forkserver_installed == true) + return; + forkserver_installed = true; + + u8 **ptr = (u8 **)map; + char *shm_env_var = getenv(SHM_ENV_VAR); + if (!shm_env_var) { + char buf[256]; + PRINT_ERROR("Error getting shm\n"); + snprintf(buf, sizeof(buf), "__afl_area_ptr: %p\n", ptr); + PRINT_ERROR(buf); + return; + } + + shm_id = atoi(shm_env_var); + *ptr = (u8 *)shmat(shm_id, NULL, 0); + if ((u8 *)*ptr == (u8 *)-1) { + PRINT_ERROR("Error: shmat\n"); + return; + } + // enter fork() server thyme! + int n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + + if (n != 4) { + PRINT_ERROR("Error writing fork server\n"); + return; + } + while (1) { + n = read(FORKSRV_FD, &__afl_temp_data, 4); + if (n != 4) { + PRINT_ERROR("Error reading fork server\n"); + return; + } + + __afl_fork_pid = fork(); + if (__afl_fork_pid < 0) { + PRINT_ERROR("Error on fork()\n"); + return; + } + if (__afl_fork_pid == 0) { + close(FORKSRV_FD); + close(FORKSRV_FD + 1); + prev_id = 0; + break; + } else { + // parrent stuff + n = write(FORKSRV_FD + 1, &__afl_fork_pid, 4); + pid_t temp_pid = waitpid(__afl_fork_pid, &__afl_temp_data, 2); + + if (temp_pid == 0) { + return; + } + n = write(FORKSRV_FD + 1, &__afl_temp_data, 4); + } + } +} -- cgit 1.4.1