summaryrefslogtreecommitdiffhomepage
path: root/pkg/merkletree/merkletree_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/merkletree/merkletree_test.go')
-rw-r--r--pkg/merkletree/merkletree_test.go521
1 files changed, 0 insertions, 521 deletions
diff --git a/pkg/merkletree/merkletree_test.go b/pkg/merkletree/merkletree_test.go
deleted file mode 100644
index e1350ebda..000000000
--- a/pkg/merkletree/merkletree_test.go
+++ /dev/null
@@ -1,521 +0,0 @@
-// Copyright 2020 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package merkletree
-
-import (
- "bytes"
- "fmt"
- "io"
- "math/rand"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/usermem"
-)
-
-func TestLayout(t *testing.T) {
- testCases := []struct {
- dataSize int64
- dataAndTreeInSameFile bool
- expectedLevelOffset []int64
- }{
- {
- dataSize: 100,
- dataAndTreeInSameFile: false,
- expectedLevelOffset: []int64{0},
- },
- {
- dataSize: 100,
- dataAndTreeInSameFile: true,
- expectedLevelOffset: []int64{usermem.PageSize},
- },
- {
- dataSize: 1000000,
- dataAndTreeInSameFile: false,
- expectedLevelOffset: []int64{0, 2 * usermem.PageSize, 3 * usermem.PageSize},
- },
- {
- dataSize: 1000000,
- dataAndTreeInSameFile: true,
- expectedLevelOffset: []int64{245 * usermem.PageSize, 247 * usermem.PageSize, 248 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- dataAndTreeInSameFile: false,
- expectedLevelOffset: []int64{0, 32 * usermem.PageSize, 33 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- dataAndTreeInSameFile: true,
- expectedLevelOffset: []int64{4096 * usermem.PageSize, 4128 * usermem.PageSize, 4129 * usermem.PageSize},
- },
- }
-
- for _, tc := range testCases {
- t.Run(fmt.Sprintf("%d", tc.dataSize), func(t *testing.T) {
- l := InitLayout(tc.dataSize, tc.dataAndTreeInSameFile)
- if l.blockSize != int64(usermem.PageSize) {
- t.Errorf("Got blockSize %d, want %d", l.blockSize, usermem.PageSize)
- }
- if l.digestSize != sha256DigestSize {
- t.Errorf("Got digestSize %d, want %d", l.digestSize, sha256DigestSize)
- }
- if l.numLevels() != len(tc.expectedLevelOffset) {
- t.Errorf("Got levels %d, want %d", l.numLevels(), len(tc.expectedLevelOffset))
- }
- for i := 0; i < l.numLevels() && i < len(tc.expectedLevelOffset); i++ {
- if l.levelOffset[i] != tc.expectedLevelOffset[i] {
- t.Errorf("Got levelStart[%d] %d, want %d", i, l.levelOffset[i], tc.expectedLevelOffset[i])
- }
- }
- })
- }
-}
-
-const (
- defaultName = "merkle_test"
- defaultMode = 0644
- defaultUID = 0
- defaultGID = 0
-)
-
-// bytesReadWriter is used to read from/write to/seek in a byte array. Unlike
-// bytes.Buffer, it keeps the whole buffer during read so that it can be reused.
-type bytesReadWriter struct {
- // bytes contains the underlying byte array.
- bytes []byte
- // readPos is the currently location for Read. Write always appends to
- // the end of the array.
- readPos int
-}
-
-func (brw *bytesReadWriter) Write(p []byte) (int, error) {
- brw.bytes = append(brw.bytes, p...)
- return len(p), nil
-}
-
-func (brw *bytesReadWriter) ReadAt(p []byte, off int64) (int, error) {
- bytesRead := copy(p, brw.bytes[off:])
- if bytesRead == 0 {
- return bytesRead, io.EOF
- }
- return bytesRead, nil
-}
-
-func TestGenerate(t *testing.T) {
- // The input data has size dataSize. It starts with the data in startWith,
- // and all other bytes are zeroes.
- testCases := []struct {
- data []byte
- expectedHash []byte
- }{
- {
- data: bytes.Repeat([]byte{0}, usermem.PageSize),
- expectedHash: []byte{64, 253, 58, 72, 192, 131, 82, 184, 193, 33, 108, 142, 43, 46, 179, 134, 244, 21, 29, 190, 14, 39, 66, 129, 6, 46, 200, 211, 30, 247, 191, 252},
- },
- {
- data: bytes.Repeat([]byte{0}, 128*usermem.PageSize+1),
- expectedHash: []byte{182, 223, 218, 62, 65, 185, 160, 219, 93, 119, 186, 88, 205, 32, 122, 231, 173, 72, 78, 76, 65, 57, 177, 146, 159, 39, 44, 123, 230, 156, 97, 26},
- },
- {
- data: []byte{'a'},
- expectedHash: []byte{28, 201, 8, 36, 150, 178, 111, 5, 193, 212, 129, 205, 206, 124, 211, 90, 224, 142, 81, 183, 72, 165, 243, 240, 242, 241, 76, 127, 101, 61, 63, 11},
- },
- {
- data: bytes.Repeat([]byte{'a'}, usermem.PageSize),
- expectedHash: []byte{106, 58, 160, 152, 41, 68, 38, 108, 245, 74, 177, 84, 64, 193, 19, 176, 249, 86, 27, 193, 85, 164, 99, 240, 79, 104, 148, 222, 76, 46, 191, 79},
- },
- }
-
- for _, tc := range testCases {
- t.Run(fmt.Sprintf("%d:%v", len(tc.data), tc.data[0]), func(t *testing.T) {
- for _, dataAndTreeInSameFile := range []bool{false, true} {
- var tree bytesReadWriter
- params := GenerateParams{
- Size: int64(len(tc.data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- TreeReader: &tree,
- TreeWriter: &tree,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
- if dataAndTreeInSameFile {
- tree.Write(tc.data)
- params.File = &tree
- } else {
- params.File = &bytesReadWriter{
- bytes: tc.data,
- }
- }
- hash, err := Generate(&params)
- if err != nil {
- t.Fatalf("Got err: %v, want nil", err)
- }
-
- if !bytes.Equal(hash, tc.expectedHash) {
- t.Errorf("Got hash: %v, want %v", hash, tc.expectedHash)
- }
- }
- })
- }
-}
-
-func TestVerify(t *testing.T) {
- // The input data has size dataSize. The portion to be verified ranges from
- // verifyStart with verifySize. A bit is flipped in outOfRangeByteIndex to
- // confirm that modifications outside the verification range does not cause
- // issue. And a bit is flipped in modifyByte to confirm that
- // modifications in the verification range is caught during verification.
- testCases := []struct {
- dataSize int64
- verifyStart int64
- verifySize int64
- // A byte in input data is modified during the test. If the
- // modified byte falls in verification range, Verify should
- // fail, otherwise Verify should still succeed.
- modifyByte int64
- modifyName bool
- modifyMode bool
- modifyUID bool
- modifyGID bool
- shouldSucceed bool
- }{
- // Verify range start outside the data range should fail.
- {
- dataSize: usermem.PageSize,
- verifyStart: usermem.PageSize,
- verifySize: 1,
- modifyByte: 0,
- shouldSucceed: false,
- },
- // Verifying range is valid if it starts inside data and ends
- // outside data range, in that case start to the end of data is
- // verified.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 0,
- shouldSucceed: false,
- },
- // Invalid verify range (negative size) should fail.
- {
- dataSize: usermem.PageSize,
- verifyStart: 1,
- verifySize: -1,
- modifyByte: 0,
- shouldSucceed: false,
- },
- // 0 verify size should only verify metadata.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- shouldSucceed: true,
- },
- // Modified name should fail verification.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- modifyName: true,
- shouldSucceed: false,
- },
- // Modified mode should fail verification.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- modifyMode: true,
- shouldSucceed: false,
- },
- // Modified UID should fail verification.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- modifyUID: true,
- shouldSucceed: false,
- },
- // Modified GID should fail verification.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- modifyGID: true,
- shouldSucceed: false,
- },
- // The test cases below use a block-aligned verify range.
- // Modifying a byte in the verified range should cause verify
- // to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4 * usermem.PageSize,
- verifySize: usermem.PageSize,
- modifyByte: 4 * usermem.PageSize,
- shouldSucceed: false,
- },
- // Modifying a byte before the verified range should not cause
- // verify to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4 * usermem.PageSize,
- verifySize: usermem.PageSize,
- modifyByte: 4*usermem.PageSize - 1,
- shouldSucceed: true,
- },
- // Modifying a byte after the verified range should not cause
- // verify to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4 * usermem.PageSize,
- verifySize: usermem.PageSize,
- modifyByte: 5 * usermem.PageSize,
- shouldSucceed: true,
- },
- // The tests below use a non-block-aligned verify range.
- // Modifying a byte at strat of verify range should cause
- // verify to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4*usermem.PageSize + 123,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 4*usermem.PageSize + 123,
- shouldSucceed: false,
- },
- // Modifying a byte at the end of verify range should cause
- // verify to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4*usermem.PageSize + 123,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 6*usermem.PageSize + 123,
- shouldSucceed: false,
- },
- // Modifying a byte in the middle verified block should cause
- // verify to fail.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4*usermem.PageSize + 123,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 5*usermem.PageSize + 123,
- shouldSucceed: false,
- },
- // Modifying a byte in the first block in the verified range
- // should cause verify to fail, even the modified bit itself is
- // out of verify range.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4*usermem.PageSize + 123,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 4*usermem.PageSize + 122,
- shouldSucceed: false,
- },
- // Modifying a byte in the last block in the verified range
- // should cause verify to fail, even the modified bit itself is
- // out of verify range.
- {
- dataSize: 8 * usermem.PageSize,
- verifyStart: 4*usermem.PageSize + 123,
- verifySize: 2 * usermem.PageSize,
- modifyByte: 6*usermem.PageSize + 124,
- shouldSucceed: false,
- },
- }
-
- for _, tc := range testCases {
- t.Run(fmt.Sprintf("%d", tc.modifyByte), func(t *testing.T) {
- data := make([]byte, tc.dataSize)
- // Generate random bytes in data.
- rand.Read(data)
-
- for _, dataAndTreeInSameFile := range []bool{false, true} {
- var tree bytesReadWriter
- genParams := GenerateParams{
- Size: int64(len(data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- TreeReader: &tree,
- TreeWriter: &tree,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
- if dataAndTreeInSameFile {
- tree.Write(data)
- genParams.File = &tree
- } else {
- genParams.File = &bytesReadWriter{
- bytes: data,
- }
- }
- hash, err := Generate(&genParams)
- if err != nil {
- t.Fatalf("Generate failed: %v", err)
- }
-
- // Flip a bit in data and checks Verify results.
- var buf bytes.Buffer
- data[tc.modifyByte] ^= 1
- verifyParams := VerifyParams{
- Out: &buf,
- File: bytes.NewReader(data),
- Tree: &tree,
- Size: tc.dataSize,
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- ReadOffset: tc.verifyStart,
- ReadSize: tc.verifySize,
- Expected: hash,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
- if tc.modifyName {
- verifyParams.Name = defaultName + "abc"
- }
- if tc.modifyMode {
- verifyParams.Mode = defaultMode + 1
- }
- if tc.modifyUID {
- verifyParams.UID = defaultUID + 1
- }
- if tc.modifyGID {
- verifyParams.GID = defaultGID + 1
- }
- if tc.shouldSucceed {
- n, err := Verify(&verifyParams)
- if err != nil && err != io.EOF {
- t.Errorf("Verification failed when expected to succeed: %v", err)
- }
- if n != tc.verifySize {
- t.Errorf("Got Verify output size %d, want %d", n, tc.verifySize)
- }
- if int64(buf.Len()) != tc.verifySize {
- t.Errorf("Got Verify output buf size %d, want %d,", buf.Len(), tc.verifySize)
- }
- if !bytes.Equal(data[tc.verifyStart:tc.verifyStart+tc.verifySize], buf.Bytes()) {
- t.Errorf("Incorrect output buf from Verify")
- }
- } else {
- if _, err := Verify(&verifyParams); err == nil {
- t.Errorf("Verification succeeded when expected to fail")
- }
- }
- }
- })
- }
-}
-
-func TestVerifyRandom(t *testing.T) {
- rand.Seed(time.Now().UnixNano())
- // Use a random dataSize. Minimum size 2 so that we can pick a random
- // portion from it.
- dataSize := rand.Int63n(200*usermem.PageSize) + 2
- data := make([]byte, dataSize)
- // Generate random bytes in data.
- rand.Read(data)
-
- for _, dataAndTreeInSameFile := range []bool{false, true} {
- var tree bytesReadWriter
- genParams := GenerateParams{
- Size: int64(len(data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- TreeReader: &tree,
- TreeWriter: &tree,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
-
- if dataAndTreeInSameFile {
- tree.Write(data)
- genParams.File = &tree
- } else {
- genParams.File = &bytesReadWriter{
- bytes: data,
- }
- }
- hash, err := Generate(&genParams)
- if err != nil {
- t.Fatalf("Generate failed: %v", err)
- }
-
- // Pick a random portion of data.
- start := rand.Int63n(dataSize - 1)
- size := rand.Int63n(dataSize) + 1
-
- var buf bytes.Buffer
- verifyParams := VerifyParams{
- Out: &buf,
- File: bytes.NewReader(data),
- Tree: &tree,
- Size: dataSize,
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- ReadOffset: start,
- ReadSize: size,
- Expected: hash,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
-
- // Checks that the random portion of data from the original data is
- // verified successfully.
- n, err := Verify(&verifyParams)
- if err != nil && err != io.EOF {
- t.Errorf("Verification failed for correct data: %v", err)
- }
- if size > dataSize-start {
- size = dataSize - start
- }
- if n != size {
- t.Errorf("Got Verify output size %d, want %d", n, size)
- }
- if int64(buf.Len()) != size {
- t.Errorf("Got Verify output buf size %d, want %d", buf.Len(), size)
- }
- if !bytes.Equal(data[start:start+size], buf.Bytes()) {
- t.Errorf("Incorrect output buf from Verify")
- }
-
- // Verify that modified metadata should fail verification.
- buf.Reset()
- verifyParams.Name = defaultName + "abc"
- if _, err := Verify(&verifyParams); err == nil {
- t.Error("Verify succeeded for modified metadata, expect failure")
- }
-
- // Flip a random bit in randPortion, and check that verification fails.
- buf.Reset()
- randBytePos := rand.Int63n(size)
- data[start+randBytePos] ^= 1
- verifyParams.File = bytes.NewReader(data)
- verifyParams.Name = defaultName
-
- if _, err := Verify(&verifyParams); err == nil {
- t.Error("Verification succeeded for modified data, expect failure")
- }
- }
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 00:28:23 +0000