372 lines
8.8 KiB
Go
372 lines
8.8 KiB
Go
package test_helpers
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import (
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"bytes"
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"crypto/md5"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net"
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"os"
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"os/exec"
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"path/filepath"
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"syscall"
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"testing"
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"time"
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"github.com/rfjakob/gocryptfs/internal/ctlsock"
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"github.com/rfjakob/gocryptfs/internal/nametransform"
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"github.com/rfjakob/gocryptfs/internal/syscallcompat"
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)
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// TmpDir will be created inside this directory, set in init() to
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// $TMPDIR/gocryptfs-test-parent .
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var testParentDir = ""
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// GocryptfsBinary is the assumed path to the gocryptfs build.
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const GocryptfsBinary = "../../gocryptfs"
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// UnmountScript is the fusermount/umount compatibility wrapper script
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const UnmountScript = "../fuse-unmount.bash"
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// X255 contains 255 uppercase "X". This can be used as a maximum-length filename.
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var X255 string
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// TmpDir is a unique temporary directory. "go test" runs package tests in parallel. We create a
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// unique TmpDir in init() so the tests do not interfere.
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var TmpDir string
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// DefaultPlainDir is TmpDir + "/default-plain"
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var DefaultPlainDir string
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// DefaultCipherDir is TmpDir + "/default-cipher"
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var DefaultCipherDir string
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// SwitchTMPDIR changes TMPDIR and hence the directory the test are performed in.
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// This is used when you want to perform tests on a special filesystem. The
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// xattr tests cannot run on tmpfs and use /var/tmp instead of /tmp.
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func SwitchTMPDIR(newDir string) {
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os.Setenv("TMPDIR", newDir)
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doInit()
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}
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func init() {
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doInit()
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}
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func doInit() {
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X255 = string(bytes.Repeat([]byte("X"), 255))
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MountInfo = make(map[string]mountInfo)
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testParentDir := os.TempDir() + "/gocryptfs-test-parent"
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os.MkdirAll(testParentDir, 0700)
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var err error
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TmpDir, err = ioutil.TempDir(testParentDir, "")
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if err != nil {
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panic(err)
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}
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DefaultPlainDir = TmpDir + "/default-plain"
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DefaultCipherDir = TmpDir + "/default-cipher"
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}
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// ResetTmpDir deletes TmpDir, create new dir tree:
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//
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// TmpDir
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// |-- DefaultPlainDir
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// *-- DefaultCipherDir
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// *-- gocryptfs.diriv
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func ResetTmpDir(createDirIV bool) {
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// Try to unmount and delete everything
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entries, err := ioutil.ReadDir(TmpDir)
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if err == nil {
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for _, e := range entries {
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d := filepath.Join(TmpDir, e.Name())
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err = os.Remove(d)
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if err != nil {
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pe := err.(*os.PathError)
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if pe.Err == syscall.EBUSY {
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if testing.Verbose() {
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fmt.Printf("Remove failed: %v. Maybe still mounted?\n", pe)
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}
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err = UnmountErr(d)
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if err != nil {
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panic(err)
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}
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} else if pe.Err != syscall.ENOTEMPTY {
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panic("Unhandled error: " + pe.Err.Error())
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}
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err = os.RemoveAll(d)
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if err != nil {
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panic(err)
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}
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}
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}
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}
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err = os.Mkdir(DefaultPlainDir, 0700)
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if err != nil {
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panic(err)
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}
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err = os.Mkdir(DefaultCipherDir, 0700)
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if err != nil {
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panic(err)
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}
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if createDirIV {
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// Open cipherdir (following symlinks)
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dirfd, err := syscall.Open(DefaultCipherDir, syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
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if err == nil {
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err = nametransform.WriteDirIVAt(dirfd)
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syscall.Close(dirfd)
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}
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if err != nil {
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panic(err)
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}
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}
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}
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// InitFS calls "gocryptfs -init" on a new directory in TmpDir, passing
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// "extraArgs" in addition to useful defaults.
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//
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// The returned cipherdir has NO trailing slash.
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func InitFS(t *testing.T, extraArgs ...string) string {
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dir, err := ioutil.TempDir(TmpDir, "")
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if err != nil {
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if t != nil {
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t.Fatal(err)
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} else {
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log.Panic(err)
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}
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}
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args := []string{"-q", "-init", "-extpass", "echo test", "-scryptn=10"}
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args = append(args, extraArgs...)
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args = append(args, dir)
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cmd := exec.Command(GocryptfsBinary, args...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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err = cmd.Run()
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if err != nil {
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if t != nil {
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t.Fatalf("InitFS with args %v failed: %v", args, err)
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} else {
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log.Panic(err)
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}
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}
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return dir
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}
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// Md5fn returns an md5 string for file "filename"
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func Md5fn(filename string) string {
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buf, err := ioutil.ReadFile(filename)
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if err != nil {
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fmt.Printf("ReadFile: %v\n", err)
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return ""
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}
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return Md5hex(buf)
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}
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// Md5hex returns an md5 string for "buf"
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func Md5hex(buf []byte) string {
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rawHash := md5.Sum(buf)
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hash := hex.EncodeToString(rawHash[:])
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return hash
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}
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// VerifySize checks that the file size equals "want". This checks:
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// 1) Size reported by Stat()
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// 2) Number of bytes returned when reading the whole file
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func VerifySize(t *testing.T, path string, want int) {
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buf, err := ioutil.ReadFile(path)
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if err != nil {
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t.Errorf("ReadFile failed: %v", err)
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} else if len(buf) != want {
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t.Errorf("wrong read size: got=%d want=%d", len(buf), want)
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}
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fi, err := os.Stat(path)
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if err != nil {
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t.Errorf("Stat failed: %v", err)
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} else if fi.Size() != int64(want) {
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t.Errorf("wrong stat file size, got=%d want=%d", fi.Size(), want)
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}
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}
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// TestMkdirRmdir creates and deletes a directory
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func TestMkdirRmdir(t *testing.T, plainDir string) {
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dir := plainDir + "/dir1"
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err := os.Mkdir(dir, 0777)
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if err != nil {
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t.Error(err)
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return
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}
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err = syscall.Rmdir(dir)
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if err != nil {
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t.Error(err)
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return
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}
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// Create a directory and put a file in it
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// Trying to rmdir it should fail with ENOTEMPTY
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err = os.Mkdir(dir, 0777)
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if err != nil {
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t.Error(err)
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return
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}
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f, err := os.Create(dir + "/file")
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if err != nil {
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t.Error(err)
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return
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}
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f.Close()
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err = syscall.Rmdir(dir)
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errno := err.(syscall.Errno)
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if errno != syscall.ENOTEMPTY {
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t.Errorf("Should have gotten ENOTEMPTY, got %v", errno)
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}
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err = syscall.Unlink(dir + "/file")
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if err != nil {
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var st syscall.Stat_t
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syscall.Stat(dir, &st)
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t.Errorf("err=%v mode=%0o", err, st.Mode)
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return
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}
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err = syscall.Rmdir(dir)
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if err != nil {
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t.Error(err)
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return
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}
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// We should also be able to remove a directory we do not have permissions to
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// read or write
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err = os.Mkdir(dir, 0000)
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if err != nil {
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t.Error(err)
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return
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}
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err = syscall.Rmdir(dir)
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if err != nil {
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// Make sure the directory can cleaned up by the next test run
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os.Chmod(dir, 0700)
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t.Error(err)
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return
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}
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}
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// TestRename creates and renames a file
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func TestRename(t *testing.T, plainDir string) {
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file1 := plainDir + "/rename1"
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file2 := plainDir + "/rename2"
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err := ioutil.WriteFile(file1, []byte("content"), 0777)
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if err != nil {
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t.Error(err)
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return
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}
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err = syscall.Rename(file1, file2)
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if err != nil {
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t.Error(err)
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return
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}
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syscall.Unlink(file2)
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}
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// VerifyExistence checks in 3 ways that "path" exists:
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// stat, open, readdir. Returns true if the path exists, false otherwise.
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// Panics if the result is inconsistent.
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func VerifyExistence(path string) bool {
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// Check if file can be stat()ed
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stat := true
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fi, err := os.Stat(path)
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if err != nil {
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stat = false
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}
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// Check if file can be opened
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open := true
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fd, err := os.Open(path)
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if err != nil {
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open = false
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}
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fd.Close()
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// Check if file shows up in directory listing
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readdir := false
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dir := filepath.Dir(path)
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name := filepath.Base(path)
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d, err := os.Open(dir)
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if err != nil && open == true {
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log.Panicf("we can open the file but not the parent dir!? err=%v", err)
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} else if err == nil {
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defer d.Close()
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listing, err := d.Readdirnames(0)
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if stat && fi.IsDir() && err != nil {
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log.Panicf("It's a directory, but readdirnames failed: %v", err)
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}
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for _, entry := range listing {
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if entry == name {
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readdir = true
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}
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}
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}
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// If the result is consistent, return it.
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if stat == open && open == readdir {
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return stat
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}
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log.Panicf("inconsistent result on %q: stat=%v open=%v readdir=%v, path=%q", name, stat, open, readdir, path)
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return false
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}
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// Du returns the disk usage of the file "fd" points to, in bytes.
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// Same as "du --block-size=1".
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func Du(t *testing.T, fd int) (nBytes int64) {
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var st syscall.Stat_t
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err := syscall.Fstat(fd, &st)
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if err != nil {
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t.Fatal(err)
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}
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// st.Blocks = number of 512-byte blocks
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return st.Blocks * 512
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}
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// QueryCtlSock sends a request to the control socket at "socketPath" and
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// returns the response.
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func QueryCtlSock(t *testing.T, socketPath string, req ctlsock.RequestStruct) (response ctlsock.ResponseStruct) {
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conn, err := net.DialTimeout("unix", socketPath, 1*time.Second)
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if err != nil {
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t.Fatal(err)
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}
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defer conn.Close()
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conn.SetDeadline(time.Now().Add(time.Second))
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msg, err := json.Marshal(req)
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if err != nil {
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t.Fatal(err)
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}
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_, err = conn.Write(msg)
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if err != nil {
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t.Fatal(err)
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}
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buf := make([]byte, ctlsock.ReadBufSize)
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n, err := conn.Read(buf)
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if err != nil {
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t.Fatal(err)
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}
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buf = buf[:n]
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json.Unmarshal(buf, &response)
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return response
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}
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// ExtractCmdExitCode extracts the exit code from an error value that was
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// returned from exec / cmd.Run()
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func ExtractCmdExitCode(err error) int {
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if err == nil {
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return 0
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}
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// OMG this is convoluted
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if err2, ok := err.(*exec.ExitError); ok {
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return err2.Sys().(syscall.WaitStatus).ExitStatus()
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}
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if err2, ok := err.(*os.PathError); ok {
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return int(err2.Err.(syscall.Errno))
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}
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log.Panicf("could not decode error %#v", err)
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return 0
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}
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