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//go:build go1.18
// +build go1.18
package s2
import (
"bytes"
"fmt"
"io"
"testing"
"github.com/klauspost/compress/internal/fuzz"
"github.com/klauspost/compress/internal/snapref"
)
func FuzzEncodingBlocks(f *testing.F) {
fuzz.AddFromZip(f, "testdata/enc_regressions.zip", fuzz.TypeRaw, false)
fuzz.AddFromZip(f, "testdata/fuzz/block-corpus-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/fuzz/block-corpus-enc.zip", fuzz.TypeGoFuzz, testing.Short())
// Fuzzing tweaks:
const (
// Max input size:
maxSize = 8 << 20
)
f.Fuzz(func(t *testing.T, data []byte) {
if len(data) > maxSize {
return
}
writeDst := make([]byte, MaxEncodedLen(len(data)), MaxEncodedLen(len(data))+4)
writeDst = append(writeDst, 1, 2, 3, 4)
defer func() {
got := writeDst[MaxEncodedLen(len(data)):]
want := []byte{1, 2, 3, 4}
if !bytes.Equal(got, want) {
t.Fatalf("want %v, got %v - dest modified outside cap", want, got)
}
}()
compDst := writeDst[:MaxEncodedLen(len(data)):MaxEncodedLen(len(data))] // Hard cap
decDst := make([]byte, len(data))
comp := Encode(compDst, data)
decoded, err := Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeBetter(compDst, data)
decoded, err = Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeBest(compDst, data)
decoded, err = Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappy(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappyBetter(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappyBest(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
concat, err := ConcatBlocks(nil, data, []byte{0})
if err != nil || concat == nil {
return
}
EstimateBlockSize(data)
encoded := make([]byte, MaxEncodedLen(len(data)))
if len(encoded) < MaxEncodedLen(len(data)) || minNonLiteralBlockSize > len(data) || len(data) > maxBlockSize {
return
}
encodeBlockGo(encoded, data)
encodeBlockBetterGo(encoded, data)
encodeBlockSnappyGo(encoded, data)
encodeBlockBetterSnappyGo(encoded, data)
if len(data) <= 64<<10 {
encodeBlockGo64K(encoded, data)
encodeBlockSnappyGo64K(encoded, data)
encodeBlockBetterGo64K(encoded, data)
encodeBlockBetterSnappyGo64K(encoded, data)
}
dst := encodeGo(encoded, data)
if dst == nil {
return
}
})
}
func FuzzStreamDecode(f *testing.F) {
enc := NewWriter(nil, WriterBlockSize(8<<10))
addCompressed := func(b []byte) {
var buf bytes.Buffer
enc.Reset(&buf)
enc.Write(b)
enc.Close()
f.Add(buf.Bytes())
}
fuzz.ReturnFromZip(f, "testdata/enc_regressions.zip", fuzz.TypeRaw, addCompressed)
fuzz.ReturnFromZip(f, "testdata/fuzz/block-corpus-raw.zip", fuzz.TypeRaw, addCompressed)
fuzz.ReturnFromZip(f, "testdata/fuzz/block-corpus-enc.zip", fuzz.TypeGoFuzz, addCompressed)
dec := NewReader(nil, ReaderIgnoreCRC())
f.Fuzz(func(t *testing.T, data []byte) {
// Using Read
dec.Reset(bytes.NewReader(data))
io.Copy(io.Discard, dec)
// Using DecodeConcurrent
dec.Reset(bytes.NewReader(data))
dec.DecodeConcurrent(io.Discard, 2)
// Use ByteReader.
dec.Reset(bytes.NewReader(data))
for {
_, err := dec.ReadByte()
if err != nil {
break
}
}
})
}
func FuzzDecodeBlock(f *testing.F) {
addCompressed := func(b []byte) {
b2 := Encode(nil, b)
f.Add(b2)
f.Add(EncodeBetter(nil, b))
}
fuzz.ReturnFromZip(f, "testdata/enc_regressions.zip", fuzz.TypeRaw, addCompressed)
fuzz.ReturnFromZip(f, "testdata/fuzz/block-corpus-raw.zip", fuzz.TypeRaw, addCompressed)
fuzz.ReturnFromZip(f, "testdata/fuzz/block-corpus-enc.zip", fuzz.TypeGoFuzz, addCompressed)
fuzz.AddFromZip(f, "testdata/dec-block-regressions.zip", fuzz.TypeRaw, false)
f.Fuzz(func(t *testing.T, data []byte) {
if t.Failed() {
return
}
dCopy := append([]byte{}, data...)
dlen, err := DecodedLen(data)
if dlen > 8<<20 {
return
}
base, baseErr := Decode(nil, data)
if !bytes.Equal(data, dCopy) {
t.Fatal("data was changed")
}
hasErr := baseErr != nil
dataCapped := make([]byte, 0, len(data)+1024)
dataCapped = append(dataCapped, data...)
dataCapped = append(dataCapped, bytes.Repeat([]byte{0xff, 0xff, 0xff, 0xff}, 1024/4)...)
dataCapped = dataCapped[:len(data):len(data)]
if dlen > MaxBlockSize {
dlen = MaxBlockSize
}
dst2 := bytes.Repeat([]byte{0xfe}, dlen+1024)
got, err := Decode(dst2[:dlen:dlen], dataCapped[:len(data)])
if !bytes.Equal(dataCapped[:len(data)], dCopy) {
t.Fatal("data was changed")
}
if err != nil && !hasErr {
t.Fatalf("base err: %v, capped: %v", baseErr, err)
}
for i, v := range dst2[dlen:] {
if v != 0xfe {
t.Errorf("DST overwritten beyond cap! index %d: got 0x%02x, want 0x%02x, err:%v", i, v, 0xfe, err)
break
}
}
if baseErr == nil {
if !bytes.Equal(got, base) {
t.Fatal("data mismatch")
}
gotLen, err := DecodedLen(data)
if err != nil {
t.Errorf("DecodedLen returned error: %v", err)
} else if gotLen != len(got) {
t.Errorf("DecodedLen mismatch: got %d, want %d", gotLen, len(got))
}
}
})
}
|
