Add afl-fuzz files

tools/afl-fuzz/Makefile

@@ -0,0 +1,12 @@
+SRC := $(wildcard */*.c)
+EXE := $(SRC:.c=)
+
+CFLAGS := -O2 -s
+LDLIBS := -ldeflate
+LDFLAGS := -L../..
+CPPFLAGS := -I../..
+
+all:$(EXE)
+
+clean:
+	rm -f $(EXE)

tools/afl-fuzz/deflate_compress/fuzz.c

@@ -0,0 +1,40 @@
+#include <assert.h>
+#include <libdeflate.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int main(int argc, char **argv)
+{
+	struct deflate_decompressor *d;
+	struct deflate_compressor *c;
+	int ret;
+	int fd = open(argv[1], O_RDONLY);
+	struct stat stbuf;
+	assert(fd >= 0);
+	ret = fstat(fd, &stbuf);
+	assert(!ret);
+
+	char in[stbuf.st_size];
+	ret = read(fd, in, sizeof in);
+	assert(ret == sizeof in);
+
+	c = deflate_alloc_compressor(6);
+	d = deflate_alloc_decompressor();
+
+	char out[sizeof(in)];
+	char checkarray[sizeof(in)];
+
+	size_t csize = deflate_compress(c, in,sizeof in, out, sizeof out);
+	if (csize) {
+		enum decompress_result res;
+		res = deflate_decompress(d, out, csize, checkarray, sizeof in, NULL);
+		assert(!res);
+		assert(!memcmp(in, checkarray, sizeof in));
+	}
+
+	deflate_free_compressor(c);
+	deflate_free_decompressor(d);
+	return 0;
+}

tools/afl-fuzz/deflate_decompress/fuzz.c

@@ -0,0 +1,28 @@
+#include <assert.h>
+#include <libdeflate.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int main(int argc, char **argv)
+{
+	struct deflate_decompressor *d;
+	int ret;
+	int fd = open(argv[1], O_RDONLY);
+	struct stat stbuf;
+	assert(fd >= 0);
+	ret = fstat(fd, &stbuf);
+	assert(!ret);
+
+	char in[stbuf.st_size];
+	ret = read(fd, in, sizeof in);
+	assert(ret == sizeof in);
+
+	char out[sizeof(in) * 3];
+
+	d = deflate_alloc_decompressor();
+
+	deflate_decompress(d, in, sizeof in, out, sizeof out, NULL);
+	deflate_free_decompressor(d);
+	return 0;
+}

tools/afl-fuzz/deflate_decompress/inputs/0

@@ -0,0 +1,3 @@
+uЋ1
+В@EgЕBl5
+‚°VЕТи6j—«X{Ѓi=Џ•иl=ЂаОџ¬СlуЯьќ™?tнРзЅD
нЁт=ЇGС%ѕ©—2xФ‡7eрDЅУРs[ФРёUkЕчq№
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ЗуrР1ЄуBЃч,lDuYj#0<ЕХћ2И0hЃEђ`№шI°ямWВ

tools/afl-fuzz/gzip_decompress/fuzz.c

@@ -0,0 +1,28 @@
+#include <assert.h>
+#include <libdeflate.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int main(int argc, char **argv)
+{
+	struct deflate_decompressor *d;
+	int ret;
+	int fd = open(argv[1], O_RDONLY);
+	struct stat stbuf;
+	assert(fd >= 0);
+	ret = fstat(fd, &stbuf);
+	assert(!ret);
+
+	char in[stbuf.st_size];
+	ret = read(fd, in, sizeof in);
+	assert(ret == sizeof in);
+
+	char out[sizeof(in) * 3];
+
+	d = deflate_alloc_decompressor();
+
+	gzip_decompress(d, in, sizeof in, out, sizeof out, NULL);
+	deflate_free_decompressor(d);
+	return 0;
+}

tools/afl-fuzz/prepare_for_fuzz.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+set -e
+
+make -C ../../ clean
+make clean
+AFL_HARDEN=1 make CC=afl-gcc -C ../../
+AFL_HARDEN=1 make CC=afl-gcc
+
+for dir in $(find . -mindepth 1 -maxdepth 1 -type d); do
+	rm -rf /tmp/$dir
+	cp -va $dir /tmp/$dir
+	mkdir -p /tmp/$dir/outputs
+done

tools/afl-fuzz/zlib_decompress/fuzz.c

@@ -0,0 +1,28 @@
+#include <assert.h>
+#include <libdeflate.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int main(int argc, char **argv)
+{
+	struct deflate_decompressor *d;
+	int ret;
+	int fd = open(argv[1], O_RDONLY);
+	struct stat stbuf;
+	assert(fd >= 0);
+	ret = fstat(fd, &stbuf);
+	assert(!ret);
+
+	char in[stbuf.st_size];
+	ret = read(fd, in, sizeof in);
+	assert(ret == sizeof in);
+
+	char out[sizeof(in) * 3];
+
+	d = deflate_alloc_decompressor();
+
+	zlib_decompress(d, in, sizeof in, out, sizeof out, NULL);
+	deflate_free_decompressor(d);
+	return 0;
+}

tools/afl-fuzz/zlib_decompress/inputs/0

@@ -0,0 +1,3 @@
+xњuЋ1
+В@EgЕBl5
+‚°VЕТи6j—«X{Ѓi=Џ•иl=ЂаОџ¬СlуЯьќ™?tнРзЅD
нЁт=ЇGС%ѕ©—2xФ‡7eрDЅУРs[ФРёUkЕчq№
|R/екµщл®°*FўMzљјv°•`Р
ЗуrР1ЄуBЃч,lDuYj#0<ЕХћ2И0hЃEђ`№шI°ямWВђ-©