summaryrefslogtreecommitdiffhomepage
path: root/pkg/merkletree
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/merkletree')
-rw-r--r--pkg/merkletree/BUILD23
-rw-r--r--pkg/merkletree/merkletree_state_autogen.go3
-rw-r--r--pkg/merkletree/merkletree_test.go905
3 files changed, 3 insertions, 928 deletions
diff --git a/pkg/merkletree/BUILD b/pkg/merkletree/BUILD
deleted file mode 100644
index dcd6c3bf5..000000000
--- a/pkg/merkletree/BUILD
+++ /dev/null
@@ -1,23 +0,0 @@
-load("//tools:defs.bzl", "go_library", "go_test")
-
-package(licenses = ["notice"])
-
-go_library(
- name = "merkletree",
- srcs = ["merkletree.go"],
- visibility = ["//pkg/sentry:internal"],
- deps = [
- "//pkg/abi/linux",
- "//pkg/hostarch",
- ],
-)
-
-go_test(
- name = "merkletree_test",
- srcs = ["merkletree_test.go"],
- library = ":merkletree",
- deps = [
- "//pkg/abi/linux",
- "//pkg/hostarch",
- ],
-)
diff --git a/pkg/merkletree/merkletree_state_autogen.go b/pkg/merkletree/merkletree_state_autogen.go
new file mode 100644
index 000000000..e5670cde4
--- /dev/null
+++ b/pkg/merkletree/merkletree_state_autogen.go
@@ -0,0 +1,3 @@
+// automatically generated by stateify.
+
+package merkletree
diff --git a/pkg/merkletree/merkletree_test.go b/pkg/merkletree/merkletree_test.go
deleted file mode 100644
index 5d6f8df1b..000000000
--- a/pkg/merkletree/merkletree_test.go
+++ /dev/null
@@ -1,905 +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"
- "errors"
- "fmt"
- "io"
- "math/rand"
- "testing"
- "time"
-
- "gvisor.dev/gvisor/pkg/abi/linux"
-
- "gvisor.dev/gvisor/pkg/hostarch"
-)
-
-func TestLayout(t *testing.T) {
- testCases := []struct {
- name string
- dataSize int64
- hashAlgorithms int
- dataAndTreeInSameFile bool
- expectedDigestSize int64
- expectedLevelOffset []int64
- }{
- {
- name: "SmallSizeSHA256SeparateFile",
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0},
- },
- {
- name: "SmallSizeSHA512SeparateFile",
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0},
- },
- {
- name: "SmallSizeSHA256SameFile",
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{hostarch.PageSize},
- },
- {
- name: "SmallSizeSHA512SameFile",
- dataSize: 100,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{hostarch.PageSize},
- },
- {
- name: "MiddleSizeSHA256SeparateFile",
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0, 2 * hostarch.PageSize, 3 * hostarch.PageSize},
- },
- {
- name: "MiddleSizeSHA512SeparateFile",
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0, 4 * hostarch.PageSize, 5 * hostarch.PageSize},
- },
- {
- name: "MiddleSizeSHA256SameFile",
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{245 * hostarch.PageSize, 247 * hostarch.PageSize, 248 * hostarch.PageSize},
- },
- {
- name: "MiddleSizeSHA512SameFile",
- dataSize: 1000000,
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{245 * hostarch.PageSize, 249 * hostarch.PageSize, 250 * hostarch.PageSize},
- },
- {
- name: "LargeSizeSHA256SeparateFile",
- dataSize: 4096 * int64(hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{0, 32 * hostarch.PageSize, 33 * hostarch.PageSize},
- },
- {
- name: "LargeSizeSHA512SeparateFile",
- dataSize: 4096 * int64(hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{0, 64 * hostarch.PageSize, 65 * hostarch.PageSize},
- },
- {
- name: "LargeSizeSHA256SameFile",
- dataSize: 4096 * int64(hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 32,
- expectedLevelOffset: []int64{4096 * hostarch.PageSize, 4128 * hostarch.PageSize, 4129 * hostarch.PageSize},
- },
- {
- name: "LargeSizeSHA512SameFile",
- dataSize: 4096 * int64(hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedDigestSize: 64,
- expectedLevelOffset: []int64{4096 * hostarch.PageSize, 4160 * hostarch.PageSize, 4161 * hostarch.PageSize},
- },
- }
-
- for _, tc := range testCases {
- t.Run(tc.name, 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(hostarch.PageSize) {
- t.Errorf("Got blockSize %d, want %d", l.blockSize, hostarch.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
- defaultSymlinkPath = "merkle_test_link"
- defaultHashAlgorithm = linux.FS_VERITY_HASH_ALG_SHA256
-)
-
-// 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 {
- name string
- data []byte
- hashAlgorithms int
- dataAndTreeInSameFile bool
- expectedHash []byte
- }{
- {
- name: "OnePageZeroesSHA256SeparateFile",
- data: bytes.Repeat([]byte{0}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{9, 115, 238, 230, 38, 140, 195, 70, 207, 144, 202, 118, 23, 113, 32, 129, 226, 239, 177, 69, 161, 26, 14, 113, 16, 37, 30, 96, 19, 148, 132, 27},
- },
- {
- name: "OnePageZeroesSHA256SameFile",
- data: bytes.Repeat([]byte{0}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{9, 115, 238, 230, 38, 140, 195, 70, 207, 144, 202, 118, 23, 113, 32, 129, 226, 239, 177, 69, 161, 26, 14, 113, 16, 37, 30, 96, 19, 148, 132, 27},
- },
- {
- name: "OnePageZeroesSHA512SeparateFile",
- data: bytes.Repeat([]byte{0}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{127, 8, 95, 11, 83, 101, 51, 39, 170, 235, 39, 43, 135, 243, 145, 118, 148, 58, 27, 155, 182, 205, 44, 47, 5, 223, 215, 17, 35, 16, 43, 104, 43, 11, 8, 88, 171, 7, 249, 243, 14, 62, 126, 218, 23, 159, 237, 237, 42, 226, 39, 25, 87, 48, 253, 191, 116, 213, 37, 3, 187, 152, 154, 14},
- },
- {
- name: "OnePageZeroesSHA512SameFile",
- data: bytes.Repeat([]byte{0}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{127, 8, 95, 11, 83, 101, 51, 39, 170, 235, 39, 43, 135, 243, 145, 118, 148, 58, 27, 155, 182, 205, 44, 47, 5, 223, 215, 17, 35, 16, 43, 104, 43, 11, 8, 88, 171, 7, 249, 243, 14, 62, 126, 218, 23, 159, 237, 237, 42, 226, 39, 25, 87, 48, 253, 191, 116, 213, 37, 3, 187, 152, 154, 14},
- },
- {
- name: "MultiplePageZeroesSHA256SeparateFile",
- data: bytes.Repeat([]byte{0}, 128*hostarch.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{247, 158, 42, 215, 180, 106, 0, 28, 77, 64, 132, 162, 74, 65, 250, 161, 243, 66, 129, 44, 197, 8, 145, 14, 94, 206, 156, 184, 145, 145, 20, 185},
- },
- {
- name: "MultiplePageZeroesSHA256SameFile",
- data: bytes.Repeat([]byte{0}, 128*hostarch.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{247, 158, 42, 215, 180, 106, 0, 28, 77, 64, 132, 162, 74, 65, 250, 161, 243, 66, 129, 44, 197, 8, 145, 14, 94, 206, 156, 184, 145, 145, 20, 185},
- },
- {
- name: "MultiplePageZeroesSHA512SeparateFile",
- data: bytes.Repeat([]byte{0}, 128*hostarch.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{100, 121, 14, 30, 104, 200, 142, 182, 190, 78, 23, 68, 157, 174, 23, 75, 174, 250, 250, 25, 66, 45, 235, 103, 129, 49, 78, 127, 173, 154, 121, 35, 37, 115, 60, 217, 26, 205, 253, 253, 236, 145, 107, 109, 232, 19, 72, 92, 4, 191, 181, 205, 191, 57, 234, 177, 144, 235, 143, 30, 15, 197, 109, 81},
- },
- {
- name: "MultiplePageZeroesSHA512SameFile",
- data: bytes.Repeat([]byte{0}, 128*hostarch.PageSize+1),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{100, 121, 14, 30, 104, 200, 142, 182, 190, 78, 23, 68, 157, 174, 23, 75, 174, 250, 250, 25, 66, 45, 235, 103, 129, 49, 78, 127, 173, 154, 121, 35, 37, 115, 60, 217, 26, 205, 253, 253, 236, 145, 107, 109, 232, 19, 72, 92, 4, 191, 181, 205, 191, 57, 234, 177, 144, 235, 143, 30, 15, 197, 109, 81},
- },
- {
- name: "SingleASHA256SeparateFile",
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{90, 124, 194, 100, 206, 242, 75, 152, 47, 249, 16, 27, 136, 161, 223, 228, 121, 241, 126, 158, 126, 122, 100, 120, 117, 15, 81, 78, 201, 133, 119, 111},
- },
- {
- name: "SingleASHA256SameFile",
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{90, 124, 194, 100, 206, 242, 75, 152, 47, 249, 16, 27, 136, 161, 223, 228, 121, 241, 126, 158, 126, 122, 100, 120, 117, 15, 81, 78, 201, 133, 119, 111},
- },
- {
- name: "SingleASHA512SeparateFile",
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{24, 10, 13, 25, 113, 62, 169, 99, 151, 70, 166, 113, 81, 81, 163, 85, 5, 25, 29, 15, 46, 37, 104, 120, 142, 218, 52, 178, 187, 83, 30, 166, 101, 87, 70, 196, 188, 61, 123, 20, 13, 254, 126, 52, 212, 111, 75, 203, 33, 233, 233, 47, 181, 161, 43, 193, 131, 41, 99, 33, 164, 73, 89, 152},
- },
- {
- name: "SingleASHA512SameFile",
- data: []byte{'a'},
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{24, 10, 13, 25, 113, 62, 169, 99, 151, 70, 166, 113, 81, 81, 163, 85, 5, 25, 29, 15, 46, 37, 104, 120, 142, 218, 52, 178, 187, 83, 30, 166, 101, 87, 70, 196, 188, 61, 123, 20, 13, 254, 126, 52, 212, 111, 75, 203, 33, 233, 233, 47, 181, 161, 43, 193, 131, 41, 99, 33, 164, 73, 89, 152},
- },
- {
- name: "OnePageASHA256SeparateFile",
- data: bytes.Repeat([]byte{'a'}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{132, 54, 112, 142, 156, 19, 50, 140, 138, 240, 192, 154, 100, 120, 242, 69, 64, 217, 62, 166, 127, 88, 23, 197, 100, 66, 255, 215, 214, 229, 54, 1},
- },
- {
- name: "OnePageASHA256SameFile",
- data: bytes.Repeat([]byte{'a'}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{132, 54, 112, 142, 156, 19, 50, 140, 138, 240, 192, 154, 100, 120, 242, 69, 64, 217, 62, 166, 127, 88, 23, 197, 100, 66, 255, 215, 214, 229, 54, 1},
- },
- {
- name: "OnePageASHA512SeparateFile",
- data: bytes.Repeat([]byte{'a'}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- expectedHash: []byte{165, 46, 176, 116, 47, 209, 101, 193, 64, 185, 30, 9, 52, 22, 24, 154, 135, 220, 232, 168, 215, 45, 222, 226, 207, 104, 160, 10, 156, 98, 245, 250, 76, 21, 68, 204, 65, 118, 69, 52, 210, 155, 36, 109, 233, 103, 1, 40, 218, 89, 125, 38, 247, 194, 2, 225, 119, 155, 65, 99, 182, 111, 110, 145},
- },
- {
- name: "OnePageASHA512SameFile",
- data: bytes.Repeat([]byte{'a'}, hostarch.PageSize),
- hashAlgorithms: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- expectedHash: []byte{165, 46, 176, 116, 47, 209, 101, 193, 64, 185, 30, 9, 52, 22, 24, 154, 135, 220, 232, 168, 215, 45, 222, 226, 207, 104, 160, 10, 156, 98, 245, 250, 76, 21, 68, 204, 65, 118, 69, 52, 210, 155, 36, 109, 233, 103, 1, 40, 218, 89, 125, 38, 247, 194, 2, 225, 119, 155, 65, 99, 182, 111, 110, 145},
- },
- }
-
- for _, tc := range testCases {
- t.Run(fmt.Sprintf(tc.name), func(t *testing.T) {
- var tree bytesReadWriter
- params := GenerateParams{
- Size: int64(len(tc.data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- Children: make(map[string]struct{}),
- HashAlgorithms: tc.hashAlgorithms,
- TreeReader: &tree,
- TreeWriter: &tree,
- DataAndTreeInSameFile: tc.dataAndTreeInSameFile,
- }
- if tc.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)
- }
- })
- }
-}
-
-// prepareVerify generates test data and corresponding Merkle tree, and returns
-// the prepared VerifyParams.
-// The test data has size dataSize. The data is hashed with hashAlgorithm. The
-// portion to be verified is the range [verifyStart, verifyStart + verifySize).
-func prepareVerify(t *testing.T, dataSize int64, hashAlgorithm int, dataAndTreeInSameFile, isSymlink bool, verifyStart, verifySize int64, out io.Writer) ([]byte, VerifyParams) {
- t.Helper()
- data := make([]byte, dataSize)
- // Generate random bytes in data.
- rand.Read(data)
-
- var tree bytesReadWriter
- genParams := GenerateParams{
- Size: int64(len(data)),
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- Children: make(map[string]struct{}),
- HashAlgorithms: hashAlgorithm,
- TreeReader: &tree,
- TreeWriter: &tree,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
- if dataAndTreeInSameFile {
- tree.Write(data)
- genParams.File = &tree
- } else {
- genParams.File = &bytesReadWriter{
- bytes: data,
- }
- }
-
- if isSymlink {
- genParams.SymlinkTarget = defaultSymlinkPath
- }
- hash, err := Generate(&genParams)
- if err != nil {
- t.Fatalf("could not generate Merkle tree:%v", err)
- }
-
- return data, VerifyParams{
- Out: out,
- File: bytes.NewReader(data),
- Tree: &tree,
- Size: dataSize,
- Name: defaultName,
- Mode: defaultMode,
- UID: defaultUID,
- GID: defaultGID,
- Children: make(map[string]struct{}),
- HashAlgorithms: hashAlgorithm,
- ReadOffset: verifyStart,
- ReadSize: verifySize,
- Expected: hash,
- DataAndTreeInSameFile: dataAndTreeInSameFile,
- }
-}
-
-func TestVerifyInvalidRange(t *testing.T) {
- testCases := []struct {
- name string
- verifyStart int64
- verifySize int64
- }{
- // Verify range starts outside data range.
- {
- name: "StartOutsideRange",
- verifyStart: hostarch.PageSize,
- verifySize: 1,
- },
- // Verify range ends outside data range.
- {
- name: "EndOutsideRange",
- verifyStart: 0,
- verifySize: 2 * hostarch.PageSize,
- },
- // Verify range with negative size.
- {
- name: "NegativeSize",
- verifyStart: 1,
- verifySize: -1,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, false /* dataAndTreeInSameFile */, false /* isSymlink */, tc.verifyStart, tc.verifySize, &buf)
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyUnmodifiedMetadata(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- isSymlink bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- isSymlink: true,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- isSymlink: false,
- },
- {
- name: "SameFileSymlink",
- dataAndTreeInSameFile: true,
- isSymlink: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, tc.isSymlink, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- if tc.isSymlink {
- params.SymlinkTarget = defaultSymlinkPath
- }
- if _, err := Verify(&params); !errors.Is(err, nil) {
- t.Errorf("Verification failed when expected to succeed: %v", err)
- }
- })
- }
-}
-
-func TestVerifyModifiedName(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.Name += "abc"
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedSize(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.Size--
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedMode(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.Mode++
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedUID(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.UID++
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedGID(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.GID++
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedChildren(t *testing.T) {
- testCases := []struct {
- name string
- dataAndTreeInSameFile bool
- }{
- {
- name: "SeparateFile",
- dataAndTreeInSameFile: false,
- },
- {
- name: "SameFile",
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.Children["abc"] = struct{}{}
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyModifiedSymlink(t *testing.T) {
- var buf bytes.Buffer
- _, params := prepareVerify(t, hostarch.PageSize /* dataSize */, defaultHashAlgorithm, false /* dataAndTreeInSameFile */, true /* isSymlink */, 0 /* verifyStart */, 0 /* verifySize */, &buf)
- params.SymlinkTarget = "merkle_modified_test_link"
- if _, err := Verify(&params); err == nil {
- t.Errorf("Verification succeeded when expected to fail")
- }
-}
-
-func TestModifyOutsideVerifyRange(t *testing.T) {
- testCases := []struct {
- name string
- // The byte with index modifyByte is modified.
- modifyByte int64
- dataAndTreeInSameFile bool
- }{
- {
- name: "BeforeRangeSeparateFile",
- modifyByte: 4*hostarch.PageSize - 1,
- dataAndTreeInSameFile: false,
- },
- {
- name: "BeforeRangeSameFile",
- modifyByte: 4*hostarch.PageSize - 1,
- dataAndTreeInSameFile: true,
- },
- {
- name: "AfterRangeSeparateFile",
- modifyByte: 5 * hostarch.PageSize,
- dataAndTreeInSameFile: false,
- },
- {
- name: "AfterRangeSameFile",
- modifyByte: 5 * hostarch.PageSize,
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- dataSize := int64(8 * hostarch.PageSize)
- verifyStart := int64(4 * hostarch.PageSize)
- verifySize := int64(hostarch.PageSize)
- var buf bytes.Buffer
- // Modified byte is outside verify range. Verify should succeed.
- data, params := prepareVerify(t, dataSize, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, verifyStart, verifySize, &buf)
- // Flip a bit in data and checks Verify results.
- data[tc.modifyByte] ^= 1
- n, err := Verify(&params)
- if !errors.Is(err, nil) {
- t.Errorf("Verification failed when expected to succeed: %v", err)
- }
- if n != verifySize {
- t.Errorf("Got Verify output size %d, want %d", n, verifySize)
- }
- if int64(buf.Len()) != verifySize {
- t.Errorf("Got Verify output buf size %d, want %d,", buf.Len(), verifySize)
- }
- if !bytes.Equal(data[verifyStart:verifyStart+verifySize], buf.Bytes()) {
- t.Errorf("Incorrect output buf from Verify")
- }
- })
- }
-}
-
-func TestModifyInsideVerifyRange(t *testing.T) {
- testCases := []struct {
- name string
- verifyStart int64
- verifySize int64
- // The byte with index modifyByte is modified.
- modifyByte int64
- dataAndTreeInSameFile bool
- }{
- // Test a block-aligned verify range.
- // Modifying a byte in the verified range should cause verify
- // to fail.
- {
- name: "BlockAlignedRangeSeparateFile",
- verifyStart: 4 * hostarch.PageSize,
- verifySize: hostarch.PageSize,
- modifyByte: 4 * hostarch.PageSize,
- dataAndTreeInSameFile: false,
- },
- {
- name: "BlockAlignedRangeSameFile",
- verifyStart: 4 * hostarch.PageSize,
- verifySize: hostarch.PageSize,
- modifyByte: 4 * hostarch.PageSize,
- dataAndTreeInSameFile: true,
- },
- // The tests below use a non-block-aligned verify range.
- // Modifying a byte at strat of verify range should cause
- // verify to fail.
- {
- name: "ModifyStartSeparateFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 4*hostarch.PageSize + 123,
- dataAndTreeInSameFile: false,
- },
- {
- name: "ModifyStartSameFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 4*hostarch.PageSize + 123,
- dataAndTreeInSameFile: true,
- },
- // Modifying a byte at the end of verify range should cause
- // verify to fail.
- {
- name: "ModifyEndSeparateFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 6*hostarch.PageSize + 123,
- dataAndTreeInSameFile: false,
- },
- {
- name: "ModifyEndSameFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 6*hostarch.PageSize + 123,
- dataAndTreeInSameFile: true,
- },
- // Modifying a byte in the middle verified block should cause
- // verify to fail.
- {
- name: "ModifyMiddleSeparateFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 5*hostarch.PageSize + 123,
- dataAndTreeInSameFile: false,
- },
- {
- name: "ModifyMiddleSameFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 5*hostarch.PageSize + 123,
- dataAndTreeInSameFile: true,
- },
- // 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.
- {
- name: "ModifyFirstBlockSeparateFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 4*hostarch.PageSize + 122,
- dataAndTreeInSameFile: false,
- },
- {
- name: "ModifyFirstBlockSameFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 4*hostarch.PageSize + 122,
- dataAndTreeInSameFile: true,
- },
- // 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.
- {
- name: "ModifyLastBlockSeparateFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 6*hostarch.PageSize + 124,
- dataAndTreeInSameFile: false,
- },
- {
- name: "ModifyLastBlockSameFile",
- verifyStart: 4*hostarch.PageSize + 123,
- verifySize: 2 * hostarch.PageSize,
- modifyByte: 6*hostarch.PageSize + 124,
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(t *testing.T) {
- dataSize := int64(8 * hostarch.PageSize)
- var buf bytes.Buffer
- data, params := prepareVerify(t, dataSize, defaultHashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, tc.verifyStart, tc.verifySize, &buf)
- // Flip a bit in data and checks Verify results.
- data[tc.modifyByte] ^= 1
- if _, err := Verify(&params); errors.Is(err, nil) {
- t.Errorf("Verification succeeded when expected to fail")
- }
- })
- }
-}
-
-func TestVerifyRandom(t *testing.T) {
- testCases := []struct {
- name string
- hashAlgorithm int
- dataAndTreeInSameFile bool
- }{
- {
- name: "SHA256SeparateFile",
- hashAlgorithm: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: false,
- },
- {
- name: "SHA512SeparateFile",
- hashAlgorithm: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: false,
- },
- {
- name: "SHA256SameFile",
- hashAlgorithm: linux.FS_VERITY_HASH_ALG_SHA256,
- dataAndTreeInSameFile: true,
- },
- {
- name: "SHA512SameFile",
- hashAlgorithm: linux.FS_VERITY_HASH_ALG_SHA512,
- dataAndTreeInSameFile: true,
- },
- }
- for _, tc := range testCases {
- t.Run(tc.name, func(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*hostarch.PageSize) + 2
-
- // Pick a random portion of data.
- start := rand.Int63n(dataSize - 1)
- size := rand.Int63n(dataSize) + 1
-
- var buf bytes.Buffer
- data, params := prepareVerify(t, dataSize, tc.hashAlgorithm, tc.dataAndTreeInSameFile, false /* isSymlink */, start, size, &buf)
-
- // Checks that the random portion of data from the original data is
- // verified successfully.
- n, err := Verify(&params)
- 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()
- params.Name = defaultName + "abc"
- if _, err := Verify(&params); errors.Is(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
- params.File = bytes.NewReader(data)
- params.Name = defaultName
-
- if _, err := Verify(&params); errors.Is(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 11:05:43 +0000