mirror of
https://github.com/octoleo/restic.git
synced 2024-11-23 21:27:34 +00:00
532 lines
12 KiB
Go
532 lines
12 KiB
Go
package repository
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"encoding/json"
|
|
"io"
|
|
"math/rand"
|
|
"sort"
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/cenkalti/backoff/v4"
|
|
"github.com/google/go-cmp/cmp"
|
|
"github.com/klauspost/compress/zstd"
|
|
"github.com/restic/restic/internal/backend"
|
|
"github.com/restic/restic/internal/crypto"
|
|
"github.com/restic/restic/internal/errors"
|
|
"github.com/restic/restic/internal/restic"
|
|
rtest "github.com/restic/restic/internal/test"
|
|
)
|
|
|
|
type mapcache map[backend.Handle]bool
|
|
|
|
func (c mapcache) Has(h backend.Handle) bool { return c[h] }
|
|
|
|
func TestSortCachedPacksFirst(t *testing.T) {
|
|
var (
|
|
blobs, sorted [100]restic.PackedBlob
|
|
|
|
cache = make(mapcache)
|
|
r = rand.New(rand.NewSource(1261))
|
|
)
|
|
|
|
for i := 0; i < len(blobs); i++ {
|
|
var id restic.ID
|
|
r.Read(id[:])
|
|
blobs[i] = restic.PackedBlob{PackID: id}
|
|
|
|
if i%3 == 0 {
|
|
h := backend.Handle{Name: id.String(), Type: backend.PackFile}
|
|
cache[h] = true
|
|
}
|
|
}
|
|
|
|
copy(sorted[:], blobs[:])
|
|
sort.SliceStable(sorted[:], func(i, j int) bool {
|
|
hi := backend.Handle{Type: backend.PackFile, Name: sorted[i].PackID.String()}
|
|
hj := backend.Handle{Type: backend.PackFile, Name: sorted[j].PackID.String()}
|
|
return cache.Has(hi) && !cache.Has(hj)
|
|
})
|
|
|
|
sortCachedPacksFirst(cache, blobs[:])
|
|
rtest.Equals(t, sorted, blobs)
|
|
}
|
|
|
|
func BenchmarkSortCachedPacksFirst(b *testing.B) {
|
|
const nblobs = 512 // Corresponds to a file of ca. 2GB.
|
|
|
|
var (
|
|
blobs [nblobs]restic.PackedBlob
|
|
cache = make(mapcache)
|
|
r = rand.New(rand.NewSource(1261))
|
|
)
|
|
|
|
for i := 0; i < nblobs; i++ {
|
|
var id restic.ID
|
|
r.Read(id[:])
|
|
blobs[i] = restic.PackedBlob{PackID: id}
|
|
|
|
if i%3 == 0 {
|
|
h := backend.Handle{Name: id.String(), Type: backend.PackFile}
|
|
cache[h] = true
|
|
}
|
|
}
|
|
|
|
var cpy [nblobs]restic.PackedBlob
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
copy(cpy[:], blobs[:])
|
|
sortCachedPacksFirst(cache, cpy[:])
|
|
}
|
|
}
|
|
|
|
// buildPackfileWithoutHeader returns a manually built pack file without a header.
|
|
func buildPackfileWithoutHeader(blobSizes []int, key *crypto.Key, compress bool) (blobs []restic.Blob, packfile []byte) {
|
|
opts := []zstd.EOption{
|
|
// Set the compression level configured.
|
|
zstd.WithEncoderLevel(zstd.SpeedDefault),
|
|
// Disable CRC, we have enough checks in place, makes the
|
|
// compressed data four bytes shorter.
|
|
zstd.WithEncoderCRC(false),
|
|
// Set a window of 512kbyte, so we have good lookbehind for usual
|
|
// blob sizes.
|
|
zstd.WithWindowSize(512 * 1024),
|
|
}
|
|
enc, err := zstd.NewWriter(nil, opts...)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
var offset uint
|
|
for i, size := range blobSizes {
|
|
plaintext := rtest.Random(800+i, size)
|
|
id := restic.Hash(plaintext)
|
|
uncompressedLength := uint(0)
|
|
if compress {
|
|
uncompressedLength = uint(len(plaintext))
|
|
plaintext = enc.EncodeAll(plaintext, nil)
|
|
}
|
|
|
|
// we use a deterministic nonce here so the whole process is
|
|
// deterministic, last byte is the blob index
|
|
var nonce = []byte{
|
|
0x15, 0x98, 0xc0, 0xf7, 0xb9, 0x65, 0x97, 0x74,
|
|
0x12, 0xdc, 0xd3, 0x62, 0xa9, 0x6e, 0x20, byte(i),
|
|
}
|
|
|
|
before := len(packfile)
|
|
packfile = append(packfile, nonce...)
|
|
packfile = key.Seal(packfile, nonce, plaintext, nil)
|
|
after := len(packfile)
|
|
|
|
ciphertextLength := after - before
|
|
|
|
blobs = append(blobs, restic.Blob{
|
|
BlobHandle: restic.BlobHandle{
|
|
Type: restic.DataBlob,
|
|
ID: id,
|
|
},
|
|
Length: uint(ciphertextLength),
|
|
UncompressedLength: uncompressedLength,
|
|
Offset: offset,
|
|
})
|
|
|
|
offset = uint(len(packfile))
|
|
}
|
|
|
|
return blobs, packfile
|
|
}
|
|
|
|
func TestStreamPack(t *testing.T) {
|
|
TestAllVersions(t, testStreamPack)
|
|
}
|
|
|
|
func testStreamPack(t *testing.T, version uint) {
|
|
dec, err := zstd.NewReader(nil)
|
|
if err != nil {
|
|
panic(dec)
|
|
}
|
|
defer dec.Close()
|
|
|
|
// always use the same key for deterministic output
|
|
key := testKey(t)
|
|
|
|
blobSizes := []int{
|
|
5522811,
|
|
10,
|
|
5231,
|
|
18812,
|
|
123123,
|
|
13522811,
|
|
12301,
|
|
892242,
|
|
28616,
|
|
13351,
|
|
252287,
|
|
188883,
|
|
3522811,
|
|
18883,
|
|
}
|
|
|
|
var compress bool
|
|
switch version {
|
|
case 1:
|
|
compress = false
|
|
case 2:
|
|
compress = true
|
|
default:
|
|
t.Fatal("test does not support repository version", version)
|
|
}
|
|
|
|
packfileBlobs, packfile := buildPackfileWithoutHeader(blobSizes, &key, compress)
|
|
|
|
loadCalls := 0
|
|
shortFirstLoad := false
|
|
|
|
loadBytes := func(length int, offset int64) []byte {
|
|
data := packfile
|
|
|
|
if offset > int64(len(data)) {
|
|
offset = 0
|
|
length = 0
|
|
}
|
|
data = data[offset:]
|
|
|
|
if length > len(data) {
|
|
length = len(data)
|
|
}
|
|
if shortFirstLoad {
|
|
length /= 2
|
|
shortFirstLoad = false
|
|
}
|
|
|
|
return data[:length]
|
|
}
|
|
|
|
load := func(ctx context.Context, h backend.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
|
|
data := loadBytes(length, offset)
|
|
if shortFirstLoad {
|
|
data = data[:len(data)/2]
|
|
shortFirstLoad = false
|
|
}
|
|
|
|
loadCalls++
|
|
|
|
err := fn(bytes.NewReader(data))
|
|
if err == nil {
|
|
return nil
|
|
}
|
|
var permanent *backoff.PermanentError
|
|
if errors.As(err, &permanent) {
|
|
return err
|
|
}
|
|
|
|
// retry loading once
|
|
return fn(bytes.NewReader(loadBytes(length, offset)))
|
|
}
|
|
|
|
// first, test regular usage
|
|
t.Run("regular", func(t *testing.T) {
|
|
tests := []struct {
|
|
blobs []restic.Blob
|
|
calls int
|
|
shortFirstLoad bool
|
|
}{
|
|
{packfileBlobs[1:2], 1, false},
|
|
{packfileBlobs[2:5], 1, false},
|
|
{packfileBlobs[2:8], 1, false},
|
|
{[]restic.Blob{
|
|
packfileBlobs[0],
|
|
packfileBlobs[4],
|
|
packfileBlobs[2],
|
|
}, 1, false},
|
|
{[]restic.Blob{
|
|
packfileBlobs[0],
|
|
packfileBlobs[len(packfileBlobs)-1],
|
|
}, 2, false},
|
|
{packfileBlobs[:], 1, true},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run("", func(t *testing.T) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
gotBlobs := make(map[restic.ID]int)
|
|
|
|
handleBlob := func(blob restic.BlobHandle, buf []byte, err error) error {
|
|
gotBlobs[blob.ID]++
|
|
|
|
id := restic.Hash(buf)
|
|
if !id.Equal(blob.ID) {
|
|
t.Fatalf("wrong id %v for blob %s returned", id, blob.ID)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
wantBlobs := make(map[restic.ID]int)
|
|
for _, blob := range test.blobs {
|
|
wantBlobs[blob.ID] = 1
|
|
}
|
|
|
|
loadCalls = 0
|
|
shortFirstLoad = test.shortFirstLoad
|
|
err := streamPack(ctx, load, nil, dec, &key, restic.ID{}, test.blobs, handleBlob)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if !cmp.Equal(wantBlobs, gotBlobs) {
|
|
t.Fatal(cmp.Diff(wantBlobs, gotBlobs))
|
|
}
|
|
rtest.Equals(t, test.calls, loadCalls)
|
|
})
|
|
}
|
|
})
|
|
shortFirstLoad = false
|
|
|
|
// next, test invalid uses, which should return an error
|
|
t.Run("invalid", func(t *testing.T) {
|
|
tests := []struct {
|
|
blobs []restic.Blob
|
|
err string
|
|
}{
|
|
{
|
|
// pass one blob several times
|
|
blobs: []restic.Blob{
|
|
packfileBlobs[3],
|
|
packfileBlobs[8],
|
|
packfileBlobs[3],
|
|
packfileBlobs[4],
|
|
},
|
|
err: "overlapping blobs in pack",
|
|
},
|
|
|
|
{
|
|
// pass something that's not a valid blob in the current pack file
|
|
blobs: []restic.Blob{
|
|
{
|
|
Offset: 123,
|
|
Length: 20000,
|
|
},
|
|
},
|
|
err: "ciphertext verification failed",
|
|
},
|
|
|
|
{
|
|
// pass a blob that's too small
|
|
blobs: []restic.Blob{
|
|
{
|
|
Offset: 123,
|
|
Length: 10,
|
|
},
|
|
},
|
|
err: "invalid blob length",
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run("", func(t *testing.T) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
handleBlob := func(blob restic.BlobHandle, buf []byte, err error) error {
|
|
return err
|
|
}
|
|
|
|
err := streamPack(ctx, load, nil, dec, &key, restic.ID{}, test.blobs, handleBlob)
|
|
if err == nil {
|
|
t.Fatalf("wanted error %v, got nil", test.err)
|
|
}
|
|
|
|
if !strings.Contains(err.Error(), test.err) {
|
|
t.Fatalf("wrong error returned, it should contain %q but was %q", test.err, err)
|
|
}
|
|
})
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestBlobVerification(t *testing.T) {
|
|
repo := TestRepository(t)
|
|
|
|
type DamageType string
|
|
const (
|
|
damageData DamageType = "data"
|
|
damageCompressed DamageType = "compressed"
|
|
damageCiphertext DamageType = "ciphertext"
|
|
)
|
|
|
|
for _, test := range []struct {
|
|
damage DamageType
|
|
msg string
|
|
}{
|
|
{"", ""},
|
|
{damageData, "hash mismatch"},
|
|
{damageCompressed, "decompression failed"},
|
|
{damageCiphertext, "ciphertext verification failed"},
|
|
} {
|
|
plaintext := rtest.Random(800, 1234)
|
|
id := restic.Hash(plaintext)
|
|
if test.damage == damageData {
|
|
plaintext[42] ^= 0x42
|
|
}
|
|
|
|
uncompressedLength := uint(len(plaintext))
|
|
plaintext = repo.getZstdEncoder().EncodeAll(plaintext, nil)
|
|
|
|
if test.damage == damageCompressed {
|
|
plaintext = plaintext[:len(plaintext)-8]
|
|
}
|
|
|
|
nonce := crypto.NewRandomNonce()
|
|
ciphertext := append([]byte{}, nonce...)
|
|
ciphertext = repo.Key().Seal(ciphertext, nonce, plaintext, nil)
|
|
|
|
if test.damage == damageCiphertext {
|
|
ciphertext[42] ^= 0x42
|
|
}
|
|
|
|
err := repo.verifyCiphertext(ciphertext, int(uncompressedLength), id)
|
|
if test.msg == "" {
|
|
rtest.Assert(t, err == nil, "expected no error, got %v", err)
|
|
} else {
|
|
rtest.Assert(t, strings.Contains(err.Error(), test.msg), "expected error to contain %q, got %q", test.msg, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestUnpackedVerification(t *testing.T) {
|
|
repo := TestRepository(t)
|
|
|
|
type DamageType string
|
|
const (
|
|
damageData DamageType = "data"
|
|
damageCompressed DamageType = "compressed"
|
|
damageCiphertext DamageType = "ciphertext"
|
|
)
|
|
|
|
for _, test := range []struct {
|
|
damage DamageType
|
|
msg string
|
|
}{
|
|
{"", ""},
|
|
{damageData, "data mismatch"},
|
|
{damageCompressed, "decompression failed"},
|
|
{damageCiphertext, "ciphertext verification failed"},
|
|
} {
|
|
plaintext := rtest.Random(800, 1234)
|
|
orig := append([]byte{}, plaintext...)
|
|
if test.damage == damageData {
|
|
plaintext[42] ^= 0x42
|
|
}
|
|
|
|
compressed := []byte{2}
|
|
compressed = repo.getZstdEncoder().EncodeAll(plaintext, compressed)
|
|
|
|
if test.damage == damageCompressed {
|
|
compressed = compressed[:len(compressed)-8]
|
|
}
|
|
|
|
nonce := crypto.NewRandomNonce()
|
|
ciphertext := append([]byte{}, nonce...)
|
|
ciphertext = repo.Key().Seal(ciphertext, nonce, compressed, nil)
|
|
|
|
if test.damage == damageCiphertext {
|
|
ciphertext[42] ^= 0x42
|
|
}
|
|
|
|
err := repo.verifyUnpacked(ciphertext, restic.IndexFile, orig)
|
|
if test.msg == "" {
|
|
rtest.Assert(t, err == nil, "expected no error, got %v", err)
|
|
} else {
|
|
rtest.Assert(t, strings.Contains(err.Error(), test.msg), "expected error to contain %q, got %q", test.msg, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func testKey(t *testing.T) crypto.Key {
|
|
const jsonKey = `{"mac":{"k":"eQenuI8adktfzZMuC8rwdA==","r":"k8cfAly2qQSky48CQK7SBA=="},"encrypt":"MKO9gZnRiQFl8mDUurSDa9NMjiu9MUifUrODTHS05wo="}`
|
|
|
|
var key crypto.Key
|
|
err := json.Unmarshal([]byte(jsonKey), &key)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return key
|
|
}
|
|
|
|
func TestStreamPackFallback(t *testing.T) {
|
|
dec, err := zstd.NewReader(nil)
|
|
if err != nil {
|
|
panic(dec)
|
|
}
|
|
defer dec.Close()
|
|
|
|
test := func(t *testing.T, failLoad bool) {
|
|
key := testKey(t)
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
plaintext := rtest.Random(800, 42)
|
|
blobID := restic.Hash(plaintext)
|
|
blobs := []restic.Blob{
|
|
{
|
|
Length: uint(crypto.CiphertextLength(len(plaintext))),
|
|
Offset: 0,
|
|
BlobHandle: restic.BlobHandle{
|
|
ID: blobID,
|
|
Type: restic.DataBlob,
|
|
},
|
|
},
|
|
}
|
|
|
|
var loadPack backendLoadFn
|
|
if failLoad {
|
|
loadPack = func(ctx context.Context, h backend.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
|
|
return errors.New("load error")
|
|
}
|
|
} else {
|
|
loadPack = func(ctx context.Context, h backend.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
|
|
// just return an empty array to provoke an error
|
|
data := make([]byte, length)
|
|
return fn(bytes.NewReader(data))
|
|
}
|
|
}
|
|
|
|
loadBlob := func(ctx context.Context, t restic.BlobType, id restic.ID, buf []byte) ([]byte, error) {
|
|
if id == blobID {
|
|
return plaintext, nil
|
|
}
|
|
return nil, errors.New("unknown blob")
|
|
}
|
|
|
|
blobOK := false
|
|
handleBlob := func(blob restic.BlobHandle, buf []byte, err error) error {
|
|
rtest.OK(t, err)
|
|
rtest.Equals(t, blobID, blob.ID)
|
|
rtest.Equals(t, plaintext, buf)
|
|
blobOK = true
|
|
return err
|
|
}
|
|
|
|
err := streamPack(ctx, loadPack, loadBlob, dec, &key, restic.ID{}, blobs, handleBlob)
|
|
rtest.OK(t, err)
|
|
rtest.Assert(t, blobOK, "blob failed to load")
|
|
}
|
|
|
|
t.Run("corrupted blob", func(t *testing.T) {
|
|
test(t, false)
|
|
})
|
|
|
|
// test fallback for failed pack loading
|
|
t.Run("failed load", func(t *testing.T) {
|
|
test(t, true)
|
|
})
|
|
}
|