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-rw-r--r--pkg/merkletree/merkletree_test.go628
1 files changed, 0 insertions, 628 deletions
diff --git a/pkg/merkletree/merkletree_test.go b/pkg/merkletree/merkletree_test.go
deleted file mode 100644
index 405204d94..000000000
--- a/pkg/merkletree/merkletree_test.go
+++ /dev/null
@@ -1,628 +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/abi/linux"
- "gvisor.dev/gvisor/pkg/usermem"
-)
-
-func TestLayout(t *testing.T) {
- testCases := []struct {
- dataSize int64
- hashAlgorithms int
- dataAndTreeInSameFile bool
- expectedDigestSize int64
- expectedLevelOffset []int64
- }{
- {
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0},
- },
- {
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0},
- },
- {
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{usermem.PageSize},
- },
- {
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{usermem.PageSize},
- },
- {
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0, 2 * usermem.PageSize, 3 * usermem.PageSize},
- },
- {
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0, 4 * usermem.PageSize, 5 * usermem.PageSize},
- },
- {
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{245 * usermem.PageSize, 247 * usermem.PageSize, 248 * usermem.PageSize},
- },
- {
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{245 * usermem.PageSize, 249 * usermem.PageSize, 250 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0, 32 * usermem.PageSize, 33 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0, 64 * usermem.PageSize, 65 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{4096 * usermem.PageSize, 4128 * usermem.PageSize, 4129 * usermem.PageSize},
- },
- {
- dataSize: 4096 * int64(usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{4096 * usermem.PageSize, 4160 * usermem.PageSize, 4161 * usermem.PageSize},
- },
- }
-
- for _, tc := range testCases {
- t.Run(fmt.Sprintf("%d", tc.dataSize), func(t *testing.T) {
- l, err := InitLayout(tc.dataSize, tc.hashAlgorithms, tc.dataAndTreeInSameFile)
- if err != nil {
- t.Fatalf("Failed to InitLayout: %v", err)
- }
- if l.blockSize != int64(usermem.PageSize) {
- t.Errorf("Got blockSize %d, want %d", l.blockSize, usermem.PageSize)
- }
- if l.digestSize != tc.expectedDigestSize {
- 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
- hashAlgorithms int
- expectedHash []byte
- }{
- {
- data: bytes.Repeat([]byte{0}, usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- expectedHash: []byte{39, 30, 12, 152, 185, 58, 32, 84, 218, 79, 74, 113, 104, 219, 230, 234, 25, 126, 147, 36, 212, 44, 76, 74, 25, 93, 228, 41, 243, 143, 59, 147},
- },
- {
- data: bytes.Repeat([]byte{0}, usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- expectedHash: []byte{184, 76, 172, 204, 17, 136, 127, 75, 224, 42, 251, 181, 98, 149, 1, 44, 58, 148, 20, 187, 30, 174, 73, 87, 166, 9, 109, 169, 42, 96, 87, 202, 59, 82, 174, 80, 51, 95, 101, 100, 6, 246, 56, 120, 27, 166, 29, 59, 67, 115, 227, 121, 241, 177, 63, 238, 82, 157, 43, 107, 174, 180, 44, 84},
- },
- {
- data: bytes.Repeat([]byte{0}, 128*usermem.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- expectedHash: []byte{213, 221, 252, 9, 241, 250, 186, 1, 242, 132, 83, 77, 180, 207, 119, 48, 206, 113, 37, 253, 252, 159, 71, 70, 3, 53, 42, 244, 230, 244, 173, 143},
- },
- {
- data: bytes.Repeat([]byte{0}, 128*usermem.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- expectedHash: []byte{40, 231, 187, 28, 3, 171, 168, 36, 177, 244, 118, 131, 218, 226, 106, 55, 245, 157, 244, 147, 144, 57, 41, 182, 65, 6, 13, 49, 38, 66, 237, 117, 124, 110, 250, 246, 248, 132, 201, 156, 195, 201, 142, 179, 122, 128, 195, 194, 187, 240, 129, 171, 168, 182, 101, 58, 194, 155, 99, 147, 49, 130, 161, 178},
- },
- {
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- expectedHash: []byte{182, 25, 170, 240, 16, 153, 234, 4, 101, 238, 197, 154, 182, 168, 171, 96, 177, 33, 171, 117, 73, 78, 124, 239, 82, 255, 215, 121, 156, 95, 121, 171},
- },
- {
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- expectedHash: []byte{121, 28, 140, 244, 32, 222, 61, 255, 184, 65, 117, 84, 132, 197, 122, 214, 95, 249, 164, 77, 211, 192, 217, 59, 109, 255, 249, 253, 27, 142, 110, 29, 93, 153, 92, 211, 178, 198, 136, 34, 61, 157, 141, 94, 145, 191, 201, 134, 141, 138, 51, 26, 33, 187, 17, 196, 113, 234, 125, 219, 4, 41, 57, 120},
- },
- {
- data: bytes.Repeat([]byte{'a'}, usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- expectedHash: []byte{17, 40, 99, 150, 206, 124, 196, 184, 41, 40, 50, 91, 113, 47, 8, 204, 2, 102, 202, 86, 157, 92, 218, 53, 151, 250, 234, 247, 191, 121, 113, 246},
- },
- {
- data: bytes.Repeat([]byte{'a'}, usermem.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- expectedHash: []byte{100, 22, 249, 78, 47, 163, 220, 231, 228, 165, 226, 192, 221, 77, 106, 69, 115, 104, 208, 155, 124, 206, 225, 233, 98, 249, 232, 225, 114, 119, 110, 216, 117, 106, 85, 7, 200, 206, 139, 81, 116, 37, 215, 158, 89, 110, 74, 86, 66, 95, 117, 237, 70, 56, 62, 175, 48, 147, 162, 122, 253, 57, 123, 84},
- },
- }
-
- 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,
- HashAlgorithms: tc.hashAlgorithms,
- 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
- modifySize 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 size should fail verification.
- {
- dataSize: usermem.PageSize,
- verifyStart: 0,
- verifySize: 0,
- modifyByte: 0,
- modifySize: 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 _, hashAlgorithms := range []int{linux.FS_VERITY_HASH_ALG_SHA256, linux.FS_VERITY_HASH_ALG_SHA512} {
- for _, dataAndTreeInSameFile := range []bool{false, true} {
- var tree bytesReadWriter
- genParams := GenerateParams{
- Size: int64(len(data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- HashAlgorithms: hashAlgorithms,
- 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,
- HashAlgorithms: hashAlgorithms,
- ReadOffset: tc.verifyStart,
- ReadSize: tc.verifySize,
- Expected: hash,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
- if tc.modifyName {
- verifyParams.Name = defaultName + "abc"
- }
- if tc.modifySize {
- verifyParams.Size--
- }
- 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 _, hashAlgorithms := range []int{linux.FS_VERITY_HASH_ALG_SHA256, linux.FS_VERITY_HASH_ALG_SHA512} {
- for _, dataAndTreeInSameFile := range []bool{false, true} {
- var tree bytesReadWriter
- genParams := GenerateParams{
- Size: int64(len(data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- HashAlgorithms: hashAlgorithms,
- 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,
- HashAlgorithms: hashAlgorithms,
- 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 2024-11-16 16:30:47 +0000