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archive/tar, compress/bzip2: base64 some troublesome testdata files

Browse Source 
This avoids complaints from scanners that look for and open
tar and bz2 files, and complain if they look weird.
In this case, they do look weird, because they are intentionally strange.
This kind of thing shouldn't be necessary, but we already have the machinery
to do it so it's easy enough.

Fixes #76799

Change-Id: Ib302b3aef30108a1325f91fcb2d166f8e1863792
Reviewed-on: https://go-review.googlesource.com/c/go/+/729780
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
This commit is contained in:
Ian Lance Taylor 2025-12-12 14:18:13 -08:00 committed by Gopher Robot
parent 388eb10f50
commit 6713f46426
13 changed files with 414 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/archive/tar/reader_test.go
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@ -10,6 +10,7 @@ import (
"errors"
"fmt"
"hash/crc32"
"internal/obscuretestdata"
"io"
"maps"
"math"
@ -25,10 +26,11 @@ import (
func TestReader(t *testing.T) {
vectors := []struct {
file string // Test input file
headers []*Header // Expected output headers
chksums []string // CRC32 checksum of files, leave as nil if not checked
err error // Expected error to occur
file string // Test input file
obscured bool // Obscured with obscuretestdata package
headers []*Header // Expected output headers
chksums []string // CRC32 checksum of files, leave as nil if not checked
err error // Expected error to occur
}{{
file: "testdata/gnu.tar",
headers: []*Header{{
@ -523,8 +525,9 @@ func TestReader(t *testing.T) {
file: "testdata/pax-nul-path.tar",
err: ErrHeader,
}, {
file: "testdata/neg-size.tar",
err: ErrHeader,
file: "testdata/neg-size.tar.base64",
obscured: true,
err: ErrHeader,
}, {
file: "testdata/issue10968.tar",
err: ErrHeader,
@ -629,15 +632,24 @@ func TestReader(t *testing.T) {
}}
for _, v := range vectors {
t.Run(path.Base(v.file), func(t *testing.T) {
f, err := os.Open(v.file)
t.Run(strings.TrimSuffix(path.Base(v.file), ".base64"), func(t *testing.T) {
path := v.file
if v.obscured {
tf, err := obscuretestdata.DecodeToTempFile(path)
if err != nil {
t.Fatalf("obscuredtestdata.DecodeToTempFile(%s): %v", path, err)
}
path = tf
}
f, err := os.Open(path)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
defer f.Close()
var fr io.Reader = f
if strings.HasSuffix(v.file, ".bz2") {
if strings.HasSuffix(v.file, ".bz2") || strings.HasSuffix(v.file, ".bz2.base64") {
fr = bzip2.NewReader(fr)
}

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@ -0,0 +1,90 @@
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src/archive/tar/testdata/neg-size.tar.base64 vendored Normal file
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@ -0,0 +1,9 @@
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c/R4UzAwdDATMDBxMDAwAAAAEDAxAAAQMDExE3P0MTAxMDB0EzAwcdThZrsDMDQAAAAQg3N8g3Nz
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src/archive/tar/testdata/pax-sparse-big.tar vendored
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src/archive/tar/testdata/pax-sparse-big.tar.base64 vendored Normal file
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@ -0,0 +1,108 @@
UGF4SGVhZGVycy4wL3BheC1zcGFyc2UAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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MAAwMDAwMDAwADAwMDAwMDAwMTcyADAwMDAwMDAwMDAwADAxMjIyNwAgeAAAAAAAAAAAAAAAAAAA
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src/archive/tar/testdata/writer-big-long.tar vendored
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src/archive/tar/testdata/writer-big-long.tar.base64 vendored Normal file
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@ -0,0 +1,27 @@
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28
src/archive/tar/writer_test.go
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@ -8,6 +8,7 @@ import (
"bytes"
"encoding/hex"
"errors"
"internal/obscuretestdata"
"io"
"io/fs"
"maps"
@ -74,8 +75,9 @@ func TestWriter(t *testing.T) {
)
vectors := []struct {
file string // Optional filename of expected output
tests []testFnc
file string // Optional filename of expected output
obscured bool // Whether file is obscured
tests []testFnc
}{{
// The writer test file was produced with this command:
// tar (GNU tar) 1.26
@ -151,7 +153,8 @@ func TestWriter(t *testing.T) {
// bsdtar -xvf writer-big-long.tar
//
// This file is in PAX format.
file: "testdata/writer-big-long.tar",
file: "testdata/writer-big-long.tar.base64",
obscured: true,
tests: []testFnc{
testHeader{Header{
Typeflag: TypeReg,
@ -393,7 +396,8 @@ func TestWriter(t *testing.T) {
testClose{},
},
}, {
file: "testdata/gnu-sparse-big.tar",
file: "testdata/gnu-sparse-big.tar.base64",
obscured: true,
tests: []testFnc{
testHeader{Header{
Typeflag: TypeGNUSparse,
@ -425,7 +429,8 @@ func TestWriter(t *testing.T) {
testClose{nil},
},
}, {
file: "testdata/pax-sparse-big.tar",
file: "testdata/pax-sparse-big.tar.base64",
obscured: true,
tests: []testFnc{
testHeader{Header{
Typeflag: TypeReg,
@ -483,7 +488,7 @@ func TestWriter(t *testing.T) {
return x == y
}
for _, v := range vectors {
t.Run(path.Base(v.file), func(t *testing.T) {
t.Run(strings.TrimSuffix(path.Base(v.file), ".base64"), func(t *testing.T) {
const maxSize = 10 << 10 // 10KiB
buf := new(bytes.Buffer)
tw := NewWriter(iotest.TruncateWriter(buf, maxSize))
@ -522,7 +527,16 @@ func TestWriter(t *testing.T) {
}
if v.file != "" {
want, err := os.ReadFile(v.file)
path := v.file
if v.obscured {
tf, err := obscuretestdata.DecodeToTempFile(path)
if err != nil {
t.Fatalf("obscuretestdata.DecodeToTempFile(%s): %v", path, err)
}
path = tf
}
want, err := os.ReadFile(path)
if err != nil {
t.Fatalf("ReadFile() = %v, want nil", err)
}

12
src/compress/bzip2/bzip2_test.go
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@ -8,8 +8,10 @@ import (
"bytes"
"encoding/hex"
"fmt"
"internal/obscuretestdata"
"io"
"os"
"strings"
"testing"
)
@ -22,6 +24,14 @@ func mustDecodeHex(s string) []byte {
}
func mustLoadFile(f string) []byte {
if strings.HasSuffix(f, ".base64") {
tf, err := obscuretestdata.DecodeToTempFile(f)
if err != nil {
panic(fmt.Sprintf("obscuretestdata.DecodeToTempFile(%s): %v", f, err))
}
f = tf
}
b, err := os.ReadFile(f)
if err != nil {
panic(err)
@ -106,7 +116,7 @@ func TestReader(t *testing.T) {
}(),
}, {
desc: "RLE2 buffer overrun - issue 5747",
input: mustLoadFile("testdata/fail-issue5747.bz2"),
input: mustLoadFile("testdata/fail-issue5747.bz2.base64"),
fail: true,
}, {
desc: "out-of-range selector - issue 8363",

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