File: fuzz_test.go

package info (click to toggle)
golang-github-klauspost-compress 1.17.2%2Bds1-1
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 46,376 kB
  • sloc: asm: 23,058; sh: 73; makefile: 11
file content (178 lines) | stat: -rw-r--r-- 4,080 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
//go:build go1.18
// +build go1.18

package flate

import (
	"bytes"
	"flag"
	"io"
	"os"
	"strconv"
	"testing"

	"github.com/klauspost/compress/internal/fuzz"
)

// Fuzzing tweaks:
var fuzzStartF = flag.Int("start", HuffmanOnly, "Start fuzzing at this level")
var fuzzEndF = flag.Int("end", BestCompression, "End fuzzing at this level (inclusive)")
var fuzzMaxF = flag.Int("max", 1<<20, "Maximum input size")
var fuzzSLF = flag.Bool("sl", true, "Include stateless encodes")
var fuzzWindow = flag.Bool("windows", true, "Include windowed encodes")

func TestMain(m *testing.M) {
	flag.Parse()
	os.Exit(m.Run())
}

func FuzzEncoding(f *testing.F) {
	fuzz.AddFromZip(f, "testdata/regression.zip", fuzz.TypeRaw, false)
	fuzz.AddFromZip(f, "testdata/fuzz/encode-raw-corpus.zip", fuzz.TypeRaw, testing.Short())
	fuzz.AddFromZip(f, "testdata/fuzz/FuzzEncoding.zip", fuzz.TypeGoFuzz, testing.Short())

	startFuzz := *fuzzStartF
	endFuzz := *fuzzEndF
	maxSize := *fuzzMaxF
	stateless := *fuzzSLF
	fuzzWindow := *fuzzWindow

	decoder := NewReader(nil)
	buf := new(bytes.Buffer)
	encs := make([]*Writer, endFuzz-startFuzz+1)
	for i := range encs {
		var err error
		encs[i], err = NewWriter(nil, i+startFuzz)
		if err != nil {
			f.Fatal(err.Error())
		}
	}

	f.Fuzz(func(t *testing.T, data []byte) {
		if len(data) > maxSize {
			return
		}
		for level := startFuzz; level <= endFuzz; level++ {
			msg := "level " + strconv.Itoa(level) + ":"
			buf.Reset()
			fw := encs[level-startFuzz]
			fw.Reset(buf)
			n, err := fw.Write(data)
			if n != len(data) {
				t.Fatal(msg + "short write")
			}
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			err = fw.Close()
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			decoder.(Resetter).Reset(buf, nil)
			data2, err := io.ReadAll(decoder)
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			if !bytes.Equal(data, data2) {
				t.Fatal(msg + "not equal")
			}
			// Do it again...
			msg = "level " + strconv.Itoa(level) + " (reset):"
			buf.Reset()
			fw.Reset(buf)
			n, err = fw.Write(data)
			if n != len(data) {
				t.Fatal(msg + "short write")
			}
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			err = fw.Close()
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			decoder.(Resetter).Reset(buf, nil)
			data2, err = io.ReadAll(decoder)
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			if !bytes.Equal(data, data2) {
				t.Fatal(msg + "not equal")
			}
		}
		if stateless {
			// Split into two and use history...
			msg := "stateless:"
			buf.Reset()
			err := StatelessDeflate(buf, data[:len(data)/2], false, nil)
			if err != nil {
				t.Error(err)
			}

			// Use top half as dictionary...
			dict := data[:len(data)/2]
			err = StatelessDeflate(buf, data[len(data)/2:], true, dict)
			if err != nil {
				t.Error(err)
			}

			decoder.(Resetter).Reset(buf, nil)
			data2, err := io.ReadAll(decoder)
			if err != nil {
				t.Error(err)
			}
			if !bytes.Equal(data, data2) {
				//fmt.Printf("want:%x\ngot: %x\n", data1, data2)
				t.Error(msg + "not equal")
			}
		}
		if fuzzWindow {
			msg := "windowed:"
			buf.Reset()
			fw, err := NewWriterWindow(buf, 1000)
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			fw.Reset(buf)
			n, err := fw.Write(data)
			if n != len(data) {
				t.Fatal(msg + "short write")
			}
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			err = fw.Close()
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			decoder.(Resetter).Reset(buf, nil)
			data2, err := io.ReadAll(decoder)
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			if !bytes.Equal(data, data2) {
				t.Fatal(msg + "not equal")
			}
			// Do it again...
			msg = msg + " (reset):"
			buf.Reset()
			fw.Reset(buf)
			n, err = fw.Write(data)
			if n != len(data) {
				t.Fatal(msg + "short write")
			}
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			err = fw.Close()
			if err != nil {
				t.Fatal(msg + err.Error())
			}
			decoder.(Resetter).Reset(buf, nil)
			data2, err = io.ReadAll(decoder)
			if err != nil {
				t.Fatal(msg + err.Error())
			}
		}
	})
}