mirror of
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7642e05eed
Gracefully handle errors while checking for EA and add debug logs.
324 lines
9.1 KiB
Go
324 lines
9.1 KiB
Go
//go:build windows
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// +build windows
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package fs
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import (
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"crypto/rand"
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"fmt"
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"math/big"
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"os"
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"path/filepath"
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"reflect"
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"strings"
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"syscall"
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"testing"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// The code below was adapted from github.com/Microsoft/go-winio under MIT license.
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// The MIT License (MIT)
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// Copyright (c) 2015 Microsoft
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// The code below was adapted from https://github.com/ambarve/go-winio/blob/a7564fd482feb903f9562a135f1317fd3b480739/ea_test.go
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// under MIT license.
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var (
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testEas = []ExtendedAttribute{
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{Name: "foo", Value: []byte("bar")},
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{Name: "fizz", Value: []byte("buzz")},
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}
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testEasEncoded = []byte{16, 0, 0, 0, 0, 3, 3, 0, 102, 111, 111, 0, 98, 97, 114, 0, 0,
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0, 0, 0, 0, 4, 4, 0, 102, 105, 122, 122, 0, 98, 117, 122, 122, 0, 0, 0}
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testEasNotPadded = testEasEncoded[0 : len(testEasEncoded)-3]
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testEasTruncated = testEasEncoded[0:20]
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)
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func TestRoundTripEas(t *testing.T) {
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b, err := EncodeExtendedAttributes(testEas)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(testEasEncoded, b) {
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t.Fatalf("Encoded mismatch %v %v", testEasEncoded, b)
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}
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eas, err := DecodeExtendedAttributes(b)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(testEas, eas) {
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t.Fatalf("mismatch %+v %+v", testEas, eas)
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}
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}
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func TestEasDontNeedPaddingAtEnd(t *testing.T) {
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eas, err := DecodeExtendedAttributes(testEasNotPadded)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(testEas, eas) {
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t.Fatalf("mismatch %+v %+v", testEas, eas)
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}
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}
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func TestTruncatedEasFailCorrectly(t *testing.T) {
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_, err := DecodeExtendedAttributes(testEasTruncated)
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if err == nil {
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t.Fatal("expected error")
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}
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}
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func TestNilEasEncodeAndDecodeAsNil(t *testing.T) {
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b, err := EncodeExtendedAttributes(nil)
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if err != nil {
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t.Fatal(err)
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}
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if len(b) != 0 {
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t.Fatal("expected empty")
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}
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eas, err := DecodeExtendedAttributes(nil)
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if err != nil {
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t.Fatal(err)
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}
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if len(eas) != 0 {
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t.Fatal("expected empty")
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}
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}
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// TestSetFileEa makes sure that the test buffer is actually parsable by NtSetEaFile.
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func TestSetFileEa(t *testing.T) {
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f, err := os.CreateTemp("", "testea")
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if err != nil {
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t.Fatal(err)
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}
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defer func() {
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err := os.Remove(f.Name())
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if err != nil {
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t.Logf("Error removing file %s: %v\n", f.Name(), err)
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}
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err = f.Close()
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if err != nil {
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t.Logf("Error closing file %s: %v\n", f.Name(), err)
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}
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}()
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ntdll := syscall.MustLoadDLL("ntdll.dll")
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ntSetEaFile := ntdll.MustFindProc("NtSetEaFile")
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var iosb [2]uintptr
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r, _, _ := ntSetEaFile.Call(f.Fd(),
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uintptr(unsafe.Pointer(&iosb[0])),
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uintptr(unsafe.Pointer(&testEasEncoded[0])),
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uintptr(len(testEasEncoded)))
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if r != 0 {
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t.Fatalf("NtSetEaFile failed with %08x", r)
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}
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}
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// The code below was refactored from github.com/Microsoft/go-winio/blob/a7564fd482feb903f9562a135f1317fd3b480739/ea_test.go
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// under MIT license.
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func TestSetGetFileEA(t *testing.T) {
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testFilePath, testFile := setupTestFile(t)
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testEAs := generateTestEAs(t, 3, testFilePath)
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fileHandle := openFile(t, testFilePath, windows.FILE_ATTRIBUTE_NORMAL)
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defer closeFileHandle(t, testFilePath, testFile, fileHandle)
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testSetGetEA(t, testFilePath, fileHandle, testEAs)
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}
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// The code is new code and reuses code refactored from github.com/Microsoft/go-winio/blob/a7564fd482feb903f9562a135f1317fd3b480739/ea_test.go
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// under MIT license.
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func TestSetGetFolderEA(t *testing.T) {
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testFolderPath := setupTestFolder(t)
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testEAs := generateTestEAs(t, 3, testFolderPath)
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fileHandle := openFile(t, testFolderPath, windows.FILE_ATTRIBUTE_NORMAL|windows.FILE_FLAG_BACKUP_SEMANTICS)
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defer closeFileHandle(t, testFolderPath, nil, fileHandle)
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testSetGetEA(t, testFolderPath, fileHandle, testEAs)
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}
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func setupTestFile(t *testing.T) (testFilePath string, testFile *os.File) {
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tempDir := t.TempDir()
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testFilePath = filepath.Join(tempDir, "testfile.txt")
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var err error
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if testFile, err = os.Create(testFilePath); err != nil {
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t.Fatalf("failed to create temporary file: %s", err)
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}
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return testFilePath, testFile
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}
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func setupTestFolder(t *testing.T) string {
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tempDir := t.TempDir()
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testfolderPath := filepath.Join(tempDir, "testfolder")
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if err := os.Mkdir(testfolderPath, os.ModeDir); err != nil {
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t.Fatalf("failed to create temporary folder: %s", err)
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}
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return testfolderPath
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}
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func generateTestEAs(t *testing.T, nAttrs int, path string) []ExtendedAttribute {
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testEAs := make([]ExtendedAttribute, nAttrs)
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for i := 0; i < nAttrs; i++ {
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testEAs[i].Name = fmt.Sprintf("TESTEA%d", i+1)
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testEAs[i].Value = make([]byte, getRandomInt())
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if _, err := rand.Read(testEAs[i].Value); err != nil {
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t.Logf("Error reading rand for path %s: %v\n", path, err)
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}
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}
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return testEAs
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}
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func getRandomInt() int64 {
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nBig, err := rand.Int(rand.Reader, big.NewInt(27))
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if err != nil {
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panic(err)
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}
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n := nBig.Int64()
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if n == 0 {
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n = getRandomInt()
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}
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return n
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}
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func openFile(t *testing.T, path string, attributes uint32) windows.Handle {
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utf16Path := windows.StringToUTF16Ptr(path)
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fileAccessRightReadWriteEA := uint32(0x8 | 0x10)
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fileHandle, err := windows.CreateFile(utf16Path, fileAccessRightReadWriteEA, 0, nil, windows.OPEN_EXISTING, attributes, 0)
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if err != nil {
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t.Fatalf("open file failed with: %s", err)
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}
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return fileHandle
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}
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func closeFileHandle(t *testing.T, testfilePath string, testFile *os.File, handle windows.Handle) {
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if testFile != nil {
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err := testFile.Close()
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if err != nil {
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t.Logf("Error closing file %s: %v\n", testFile.Name(), err)
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}
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}
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if err := windows.Close(handle); err != nil {
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t.Logf("Error closing file handle %s: %v\n", testfilePath, err)
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}
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cleanupTestFile(t, testfilePath)
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}
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func cleanupTestFile(t *testing.T, path string) {
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if err := os.Remove(path); err != nil {
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t.Logf("Error removing file/folder %s: %v\n", path, err)
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}
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}
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func testSetGetEA(t *testing.T, path string, handle windows.Handle, testEAs []ExtendedAttribute) {
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if err := SetFileEA(handle, testEAs); err != nil {
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t.Fatalf("set EA for path %s failed: %s", path, err)
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}
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readEAs, err := GetFileEA(handle)
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if err != nil {
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t.Fatalf("get EA for path %s failed: %s", path, err)
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}
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if !reflect.DeepEqual(readEAs, testEAs) {
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t.Logf("expected: %+v, found: %+v\n", testEAs, readEAs)
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t.Fatalf("EAs read from path %s don't match", path)
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}
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}
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func TestPathSupportsExtendedAttributes(t *testing.T) {
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testCases := []struct {
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name string
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path string
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expected bool
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}{
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{
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name: "System drive",
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path: os.Getenv("SystemDrive") + `\`,
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expected: true,
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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supported, err := PathSupportsExtendedAttributes(tc.path)
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if supported != tc.expected {
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t.Errorf("Expected %v, got %v for path %s", tc.expected, supported, tc.path)
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}
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})
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}
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// Test with an invalid path
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_, err := PathSupportsExtendedAttributes("Z:\\NonExistentPath-UAS664da5s4dyu56das45f5as")
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if err == nil {
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t.Error("Expected an error for non-existent path, but got nil")
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}
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}
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func TestGetVolumePathName(t *testing.T) {
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tempDirVolume := filepath.VolumeName(os.TempDir())
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testCases := []struct {
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name string
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path string
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expectedPrefix string
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}{
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{
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name: "Root directory",
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path: os.Getenv("SystemDrive") + `\`,
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expectedPrefix: os.Getenv("SystemDrive"),
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},
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{
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name: "Nested directory",
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path: os.Getenv("SystemDrive") + `\Windows\System32`,
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expectedPrefix: os.Getenv("SystemDrive"),
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},
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{
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name: "Temp directory",
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path: os.TempDir() + `\`,
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expectedPrefix: tempDirVolume,
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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volumeName, err := GetVolumePathName(tc.path)
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if err != nil {
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t.Fatalf("Unexpected error: %v", err)
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}
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if !strings.HasPrefix(volumeName, tc.expectedPrefix) {
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t.Errorf("Expected volume name to start with %s, but got %s", tc.expectedPrefix, volumeName)
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}
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})
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}
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// Test with an invalid path
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_, err := GetVolumePathName("Z:\\NonExistentPath")
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if err == nil {
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t.Error("Expected an error for non-existent path, but got nil")
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}
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}
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