mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
572 lines
14 KiB
Go
572 lines
14 KiB
Go
package tarsum
|
|
|
|
import (
|
|
"archive/tar"
|
|
"bytes"
|
|
"compress/gzip"
|
|
"crypto/md5"
|
|
"crypto/rand"
|
|
"crypto/sha1"
|
|
"crypto/sha256"
|
|
"crypto/sha512"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"testing"
|
|
)
|
|
|
|
type testLayer struct {
|
|
filename string
|
|
options *sizedOptions
|
|
jsonfile string
|
|
gzip bool
|
|
tarsum string
|
|
version Version
|
|
hash THash
|
|
}
|
|
|
|
var testLayers = []testLayer{
|
|
{
|
|
filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
|
|
jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
|
|
version: Version0,
|
|
tarsum: "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"},
|
|
{
|
|
filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
|
|
jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
|
|
version: VersionDev,
|
|
tarsum: "tarsum.dev+sha256:486b86e25c4db4551228154848bc4663b15dd95784b1588980f4ba1cb42e83e9"},
|
|
{
|
|
filename: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar",
|
|
jsonfile: "testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/json",
|
|
gzip: true,
|
|
tarsum: "tarsum+sha256:e58fcf7418d4390dec8e8fb69d88c06ec07039d651fedd3aa72af9972e7d046b"},
|
|
{
|
|
// Tests existing version of TarSum when xattrs are present
|
|
filename: "testdata/xattr/layer.tar",
|
|
jsonfile: "testdata/xattr/json",
|
|
version: Version0,
|
|
tarsum: "tarsum+sha256:e86f81a4d552f13039b1396ed03ca968ea9717581f9577ef1876ea6ff9b38c98"},
|
|
{
|
|
// Tests next version of TarSum when xattrs are present
|
|
filename: "testdata/xattr/layer.tar",
|
|
jsonfile: "testdata/xattr/json",
|
|
version: VersionDev,
|
|
tarsum: "tarsum.dev+sha256:6235cd3a2afb7501bac541772a3d61a3634e95bc90bb39a4676e2cb98d08390d"},
|
|
{
|
|
filename: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/layer.tar",
|
|
jsonfile: "testdata/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158/json",
|
|
tarsum: "tarsum+sha256:ac672ee85da9ab7f9667ae3c32841d3e42f33cc52c273c23341dabba1c8b0c8b"},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+sha256:8bf12d7e67c51ee2e8306cba569398b1b9f419969521a12ffb9d8875e8836738"},
|
|
{
|
|
// this tar has two files with the same path
|
|
filename: "testdata/collision/collision-0.tar",
|
|
tarsum: "tarsum+sha256:08653904a68d3ab5c59e65ef58c49c1581caa3c34744f8d354b3f575ea04424a"},
|
|
{
|
|
// this tar has the same two files (with the same path), but reversed order. ensuring is has different hash than above
|
|
filename: "testdata/collision/collision-1.tar",
|
|
tarsum: "tarsum+sha256:b51c13fbefe158b5ce420d2b930eef54c5cd55c50a2ee4abdddea8fa9f081e0d"},
|
|
{
|
|
// this tar has newer of collider-0.tar, ensuring is has different hash
|
|
filename: "testdata/collision/collision-2.tar",
|
|
tarsum: "tarsum+sha256:381547080919bb82691e995508ae20ed33ce0f6948d41cafbeb70ce20c73ee8e"},
|
|
{
|
|
// this tar has newer of collider-1.tar, ensuring is has different hash
|
|
filename: "testdata/collision/collision-3.tar",
|
|
tarsum: "tarsum+sha256:f886e431c08143164a676805205979cd8fa535dfcef714db5515650eea5a7c0f"},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+md5:0d7529ec7a8360155b48134b8e599f53",
|
|
hash: md5THash,
|
|
},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+sha1:f1fee39c5925807ff75ef1925e7a23be444ba4df",
|
|
hash: sha1Hash,
|
|
},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+sha224:6319390c0b061d639085d8748b14cd55f697cf9313805218b21cf61c",
|
|
hash: sha224Hash,
|
|
},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+sha384:a578ce3ce29a2ae03b8ed7c26f47d0f75b4fc849557c62454be4b5ffd66ba021e713b48ce71e947b43aab57afd5a7636",
|
|
hash: sha384Hash,
|
|
},
|
|
{
|
|
options: &sizedOptions{1, 1024 * 1024, false, false}, // a 1mb file (in memory)
|
|
tarsum: "tarsum+sha512:e9bfb90ca5a4dfc93c46ee061a5cf9837de6d2fdf82544d6460d3147290aecfabf7b5e415b9b6e72db9b8941f149d5d69fb17a394cbfaf2eac523bd9eae21855",
|
|
hash: sha512Hash,
|
|
},
|
|
}
|
|
|
|
type sizedOptions struct {
|
|
num int64
|
|
size int64
|
|
isRand bool
|
|
realFile bool
|
|
}
|
|
|
|
// make a tar:
|
|
// * num is the number of files the tar should have
|
|
// * size is the bytes per file
|
|
// * isRand is whether the contents of the files should be a random chunk (otherwise it's all zeros)
|
|
// * realFile will write to a TempFile, instead of an in memory buffer
|
|
func sizedTar(opts sizedOptions) io.Reader {
|
|
var (
|
|
fh io.ReadWriter
|
|
err error
|
|
)
|
|
if opts.realFile {
|
|
fh, err = ioutil.TempFile("", "tarsum")
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
} else {
|
|
fh = bytes.NewBuffer([]byte{})
|
|
}
|
|
tarW := tar.NewWriter(fh)
|
|
defer tarW.Close()
|
|
for i := int64(0); i < opts.num; i++ {
|
|
err := tarW.WriteHeader(&tar.Header{
|
|
Name: fmt.Sprintf("/testdata%d", i),
|
|
Mode: 0755,
|
|
Uid: 0,
|
|
Gid: 0,
|
|
Size: opts.size,
|
|
})
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
var rBuf []byte
|
|
if opts.isRand {
|
|
rBuf = make([]byte, 8)
|
|
_, err = rand.Read(rBuf)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
} else {
|
|
rBuf = []byte{0, 0, 0, 0, 0, 0, 0, 0}
|
|
}
|
|
|
|
for i := int64(0); i < opts.size/int64(8); i++ {
|
|
tarW.Write(rBuf)
|
|
}
|
|
}
|
|
return fh
|
|
}
|
|
|
|
func emptyTarSum(gzip bool) (TarSum, error) {
|
|
reader, writer := io.Pipe()
|
|
tarWriter := tar.NewWriter(writer)
|
|
|
|
// Immediately close tarWriter and write-end of the
|
|
// Pipe in a separate goroutine so we don't block.
|
|
go func() {
|
|
tarWriter.Close()
|
|
writer.Close()
|
|
}()
|
|
|
|
return NewTarSum(reader, !gzip, Version0)
|
|
}
|
|
|
|
// TestEmptyTar tests that tarsum does not fail to read an empty tar
|
|
// and correctly returns the hex digest of an empty hash.
|
|
func TestEmptyTar(t *testing.T) {
|
|
// Test without gzip.
|
|
ts, err := emptyTarSum(false)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
zeroBlock := make([]byte, 1024)
|
|
buf := new(bytes.Buffer)
|
|
|
|
n, err := io.Copy(buf, ts)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if n != int64(len(zeroBlock)) || !bytes.Equal(buf.Bytes(), zeroBlock) {
|
|
t.Fatalf("tarSum did not write the correct number of zeroed bytes: %d", n)
|
|
}
|
|
|
|
expectedSum := ts.Version().String() + "+sha256:" + hex.EncodeToString(sha256.New().Sum(nil))
|
|
resultSum := ts.Sum(nil)
|
|
|
|
if resultSum != expectedSum {
|
|
t.Fatalf("expected [%s] but got [%s]", expectedSum, resultSum)
|
|
}
|
|
|
|
// Test with gzip.
|
|
ts, err = emptyTarSum(true)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
buf.Reset()
|
|
|
|
n, err = io.Copy(buf, ts)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
bufgz := new(bytes.Buffer)
|
|
gz := gzip.NewWriter(bufgz)
|
|
n, err = io.Copy(gz, bytes.NewBuffer(zeroBlock))
|
|
gz.Close()
|
|
gzBytes := bufgz.Bytes()
|
|
|
|
if n != int64(len(zeroBlock)) || !bytes.Equal(buf.Bytes(), gzBytes) {
|
|
t.Fatalf("tarSum did not write the correct number of gzipped-zeroed bytes: %d", n)
|
|
}
|
|
|
|
resultSum = ts.Sum(nil)
|
|
|
|
if resultSum != expectedSum {
|
|
t.Fatalf("expected [%s] but got [%s]", expectedSum, resultSum)
|
|
}
|
|
|
|
// Test without ever actually writing anything.
|
|
if ts, err = NewTarSum(bytes.NewReader([]byte{}), true, Version0); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
resultSum = ts.Sum(nil)
|
|
|
|
if resultSum != expectedSum {
|
|
t.Fatalf("expected [%s] but got [%s]", expectedSum, resultSum)
|
|
}
|
|
}
|
|
|
|
var (
|
|
md5THash = NewTHash("md5", md5.New)
|
|
sha1Hash = NewTHash("sha1", sha1.New)
|
|
sha224Hash = NewTHash("sha224", sha256.New224)
|
|
sha384Hash = NewTHash("sha384", sha512.New384)
|
|
sha512Hash = NewTHash("sha512", sha512.New)
|
|
)
|
|
|
|
func TestTarSums(t *testing.T) {
|
|
for _, layer := range testLayers {
|
|
var (
|
|
fh io.Reader
|
|
err error
|
|
)
|
|
if len(layer.filename) > 0 {
|
|
fh, err = os.Open(layer.filename)
|
|
if err != nil {
|
|
t.Errorf("failed to open %s: %s", layer.filename, err)
|
|
continue
|
|
}
|
|
} else if layer.options != nil {
|
|
fh = sizedTar(*layer.options)
|
|
} else {
|
|
// What else is there to test?
|
|
t.Errorf("what to do with %#v", layer)
|
|
continue
|
|
}
|
|
if file, ok := fh.(*os.File); ok {
|
|
defer file.Close()
|
|
}
|
|
|
|
var ts TarSum
|
|
if layer.hash == nil {
|
|
// double negatives!
|
|
ts, err = NewTarSum(fh, !layer.gzip, layer.version)
|
|
} else {
|
|
ts, err = NewTarSumHash(fh, !layer.gzip, layer.version, layer.hash)
|
|
}
|
|
if err != nil {
|
|
t.Errorf("%q :: %q", err, layer.filename)
|
|
continue
|
|
}
|
|
|
|
// Read variable number of bytes to test dynamic buffer
|
|
dBuf := make([]byte, 1)
|
|
_, err = ts.Read(dBuf)
|
|
if err != nil {
|
|
t.Errorf("failed to read 1B from %s: %s", layer.filename, err)
|
|
continue
|
|
}
|
|
dBuf = make([]byte, 16*1024)
|
|
_, err = ts.Read(dBuf)
|
|
if err != nil {
|
|
t.Errorf("failed to read 16KB from %s: %s", layer.filename, err)
|
|
continue
|
|
}
|
|
|
|
// Read and discard remaining bytes
|
|
_, err = io.Copy(ioutil.Discard, ts)
|
|
if err != nil {
|
|
t.Errorf("failed to copy from %s: %s", layer.filename, err)
|
|
continue
|
|
}
|
|
var gotSum string
|
|
if len(layer.jsonfile) > 0 {
|
|
jfh, err := os.Open(layer.jsonfile)
|
|
if err != nil {
|
|
t.Errorf("failed to open %s: %s", layer.jsonfile, err)
|
|
continue
|
|
}
|
|
buf, err := ioutil.ReadAll(jfh)
|
|
if err != nil {
|
|
t.Errorf("failed to readAll %s: %s", layer.jsonfile, err)
|
|
continue
|
|
}
|
|
gotSum = ts.Sum(buf)
|
|
} else {
|
|
gotSum = ts.Sum(nil)
|
|
}
|
|
|
|
if layer.tarsum != gotSum {
|
|
t.Errorf("expecting [%s], but got [%s]", layer.tarsum, gotSum)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestIteration(t *testing.T) {
|
|
headerTests := []struct {
|
|
expectedSum string // TODO(vbatts) it would be nice to get individual sums of each
|
|
version Version
|
|
hdr *tar.Header
|
|
data []byte
|
|
}{
|
|
{
|
|
"tarsum+sha256:626c4a2e9a467d65c33ae81f7f3dedd4de8ccaee72af73223c4bc4718cbc7bbd",
|
|
Version0,
|
|
&tar.Header{
|
|
Name: "file.txt",
|
|
Size: 0,
|
|
Typeflag: tar.TypeReg,
|
|
Devminor: 0,
|
|
Devmajor: 0,
|
|
},
|
|
[]byte(""),
|
|
},
|
|
{
|
|
"tarsum.dev+sha256:6ffd43a1573a9913325b4918e124ee982a99c0f3cba90fc032a65f5e20bdd465",
|
|
VersionDev,
|
|
&tar.Header{
|
|
Name: "file.txt",
|
|
Size: 0,
|
|
Typeflag: tar.TypeReg,
|
|
Devminor: 0,
|
|
Devmajor: 0,
|
|
},
|
|
[]byte(""),
|
|
},
|
|
{
|
|
"tarsum.dev+sha256:b38166c059e11fb77bef30bf16fba7584446e80fcc156ff46d47e36c5305d8ef",
|
|
VersionDev,
|
|
&tar.Header{
|
|
Name: "another.txt",
|
|
Uid: 1000,
|
|
Gid: 1000,
|
|
Uname: "slartibartfast",
|
|
Gname: "users",
|
|
Size: 4,
|
|
Typeflag: tar.TypeReg,
|
|
Devminor: 0,
|
|
Devmajor: 0,
|
|
},
|
|
[]byte("test"),
|
|
},
|
|
{
|
|
"tarsum.dev+sha256:4cc2e71ac5d31833ab2be9b4f7842a14ce595ec96a37af4ed08f87bc374228cd",
|
|
VersionDev,
|
|
&tar.Header{
|
|
Name: "xattrs.txt",
|
|
Uid: 1000,
|
|
Gid: 1000,
|
|
Uname: "slartibartfast",
|
|
Gname: "users",
|
|
Size: 4,
|
|
Typeflag: tar.TypeReg,
|
|
Xattrs: map[string]string{
|
|
"user.key1": "value1",
|
|
"user.key2": "value2",
|
|
},
|
|
},
|
|
[]byte("test"),
|
|
},
|
|
{
|
|
"tarsum.dev+sha256:65f4284fa32c0d4112dd93c3637697805866415b570587e4fd266af241503760",
|
|
VersionDev,
|
|
&tar.Header{
|
|
Name: "xattrs.txt",
|
|
Uid: 1000,
|
|
Gid: 1000,
|
|
Uname: "slartibartfast",
|
|
Gname: "users",
|
|
Size: 4,
|
|
Typeflag: tar.TypeReg,
|
|
Xattrs: map[string]string{
|
|
"user.KEY1": "value1", // adding different case to ensure different sum
|
|
"user.key2": "value2",
|
|
},
|
|
},
|
|
[]byte("test"),
|
|
},
|
|
{
|
|
"tarsum+sha256:c12bb6f1303a9ddbf4576c52da74973c00d14c109bcfa76b708d5da1154a07fa",
|
|
Version0,
|
|
&tar.Header{
|
|
Name: "xattrs.txt",
|
|
Uid: 1000,
|
|
Gid: 1000,
|
|
Uname: "slartibartfast",
|
|
Gname: "users",
|
|
Size: 4,
|
|
Typeflag: tar.TypeReg,
|
|
Xattrs: map[string]string{
|
|
"user.NOT": "CALCULATED",
|
|
},
|
|
},
|
|
[]byte("test"),
|
|
},
|
|
}
|
|
for _, htest := range headerTests {
|
|
s, err := renderSumForHeader(htest.version, htest.hdr, htest.data)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if s != htest.expectedSum {
|
|
t.Errorf("expected sum: %q, got: %q", htest.expectedSum, s)
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func renderSumForHeader(v Version, h *tar.Header, data []byte) (string, error) {
|
|
buf := bytes.NewBuffer(nil)
|
|
// first build our test tar
|
|
tw := tar.NewWriter(buf)
|
|
if err := tw.WriteHeader(h); err != nil {
|
|
return "", err
|
|
}
|
|
if _, err := tw.Write(data); err != nil {
|
|
return "", err
|
|
}
|
|
tw.Close()
|
|
|
|
ts, err := NewTarSum(buf, true, v)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
tr := tar.NewReader(ts)
|
|
for {
|
|
hdr, err := tr.Next()
|
|
if hdr == nil || err == io.EOF {
|
|
// Signals the end of the archive.
|
|
break
|
|
}
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if _, err = io.Copy(ioutil.Discard, tr); err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
return ts.Sum(nil), nil
|
|
}
|
|
|
|
func Benchmark9kTar(b *testing.B) {
|
|
buf := bytes.NewBuffer([]byte{})
|
|
fh, err := os.Open("testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar")
|
|
if err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
n, err := io.Copy(buf, fh)
|
|
fh.Close()
|
|
|
|
reader := bytes.NewReader(buf.Bytes())
|
|
|
|
b.SetBytes(n)
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
reader.Seek(0, 0)
|
|
ts, err := NewTarSum(reader, true, Version0)
|
|
if err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
io.Copy(ioutil.Discard, ts)
|
|
ts.Sum(nil)
|
|
}
|
|
}
|
|
|
|
func Benchmark9kTarGzip(b *testing.B) {
|
|
buf := bytes.NewBuffer([]byte{})
|
|
fh, err := os.Open("testdata/46af0962ab5afeb5ce6740d4d91652e69206fc991fd5328c1a94d364ad00e457/layer.tar")
|
|
if err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
n, err := io.Copy(buf, fh)
|
|
fh.Close()
|
|
|
|
reader := bytes.NewReader(buf.Bytes())
|
|
|
|
b.SetBytes(n)
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
reader.Seek(0, 0)
|
|
ts, err := NewTarSum(reader, false, Version0)
|
|
if err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
io.Copy(ioutil.Discard, ts)
|
|
ts.Sum(nil)
|
|
}
|
|
}
|
|
|
|
// this is a single big file in the tar archive
|
|
func Benchmark1mbSingleFileTar(b *testing.B) {
|
|
benchmarkTar(b, sizedOptions{1, 1024 * 1024, true, true}, false)
|
|
}
|
|
|
|
// this is a single big file in the tar archive
|
|
func Benchmark1mbSingleFileTarGzip(b *testing.B) {
|
|
benchmarkTar(b, sizedOptions{1, 1024 * 1024, true, true}, true)
|
|
}
|
|
|
|
// this is 1024 1k files in the tar archive
|
|
func Benchmark1kFilesTar(b *testing.B) {
|
|
benchmarkTar(b, sizedOptions{1024, 1024, true, true}, false)
|
|
}
|
|
|
|
// this is 1024 1k files in the tar archive
|
|
func Benchmark1kFilesTarGzip(b *testing.B) {
|
|
benchmarkTar(b, sizedOptions{1024, 1024, true, true}, true)
|
|
}
|
|
|
|
func benchmarkTar(b *testing.B, opts sizedOptions, isGzip bool) {
|
|
var fh *os.File
|
|
tarReader := sizedTar(opts)
|
|
if br, ok := tarReader.(*os.File); ok {
|
|
fh = br
|
|
}
|
|
defer os.Remove(fh.Name())
|
|
defer fh.Close()
|
|
|
|
b.SetBytes(opts.size * opts.num)
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
ts, err := NewTarSum(fh, !isGzip, Version0)
|
|
if err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
io.Copy(ioutil.Discard, ts)
|
|
ts.Sum(nil)
|
|
fh.Seek(0, 0)
|
|
}
|
|
}
|