372 lines
9.5 KiB
Go
372 lines
9.5 KiB
Go
// Tests and benchmarks performed with default settings only.
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package defaults
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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"sync"
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"testing"
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"github.com/rfjakob/gocryptfs/tests/test_helpers"
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)
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func TestMain(m *testing.M) {
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test_helpers.ResetTmpDir(true)
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test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "-zerokey")
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r := m.Run()
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test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
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os.Exit(r)
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}
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// Test that we get the right timestamp when extracting a tarball.
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func Test1980Tar(t *testing.T) {
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c := exec.Command("tar", "xzf", "1980.tar.gz", "-C", test_helpers.DefaultPlainDir)
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c.Stderr = os.Stderr
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c.Stdout = os.Stdout
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err := c.Run()
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if err != nil {
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t.Fatal(err)
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}
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fi, err := os.Stat(test_helpers.DefaultPlainDir + "/1980.txt")
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if err != nil {
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t.Fatal(err)
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}
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m := fi.ModTime().Unix()
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if m != 315619323 {
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t.Errorf("Wrong mtime: %d", m)
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}
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}
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// In gocryptfs before v1.2, the file header was only read once for each
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// open. But truncating a file to zero will generate a new random file ID.
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// The sequence below caused an I/O error to be returned.
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func TestOpenTruncateRead(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/TestTruncateWrite"
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// First FD is used for write and truncate.
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writeFd, err := os.Create(fn)
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if err != nil {
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t.Fatal(err)
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}
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defer writeFd.Close()
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abc := []byte("abc")
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_, err = writeFd.WriteAt(abc, 0)
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if err != nil {
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t.Fatal(err)
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}
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// Second FD is just for reading.
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readFd, err := os.Open(fn)
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if err != nil {
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t.Fatal(err)
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}
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defer readFd.Close()
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content := make([]byte, 3)
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_, err = readFd.ReadAt(content, 0)
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(content, abc) {
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t.Fatalf("wrong content: %s", string(content))
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}
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// Truncate to zero to generate a new file ID and write new content.
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err = writeFd.Truncate(0)
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if err != nil {
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t.Fatal(err)
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}
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xyz := []byte("xyz")
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_, err = writeFd.WriteAt(xyz, 0)
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if err != nil {
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t.Fatal(err)
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}
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// Try to read from the other FD.
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_, err = readFd.ReadAt(content, 0)
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(content, xyz) {
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t.Fatalf("wrong content: %s", string(content))
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}
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}
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// TestWORead tries to read from a write-only FD.
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func TestWORead(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/TestWORead"
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fd, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY, 0600)
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if err != nil {
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t.Fatal(err)
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}
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defer fd.Close()
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buf := make([]byte, 10)
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_, err = fd.Read(buf)
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if err == nil {
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t.Error("Reading from write-only file should fail, but did not")
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}
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}
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// xfstests generic/124 triggers this warning:
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// cipherSize 18 == header size: interrupted write?
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// This test reproduces the problem.
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func TestXfs124(t *testing.T) {
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// GOMAXPROCS=8 and N=5000 seem to reliably trigger the problem. With N=1000,
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// the test passes sometimes.
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runtime.GOMAXPROCS(8)
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N := 5000
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fn := test_helpers.DefaultPlainDir + "/TestXfs124"
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fd, err := os.Create(fn)
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if err != nil {
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t.Fatal(err)
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}
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defer fd.Close()
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var wg sync.WaitGroup
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wg.Add(2)
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go func() {
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buf := make([]byte, 10)
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var err2 error
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for i := 0; i < N; i++ {
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err2 = fd.Truncate(0)
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if err2 != nil {
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panic(err2)
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}
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_, err2 = fd.WriteAt(buf, 0)
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if err2 != nil {
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panic(err2)
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}
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}
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wg.Done()
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}()
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fd2, err := os.Open(fn)
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if err != nil {
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t.Fatal(err)
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}
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defer fd2.Close()
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go func() {
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buf := make([]byte, 10)
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var err3 error
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for i := 0; i < N; i++ {
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_, err3 = fd2.ReadAt(buf, 0)
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if err3 == io.EOF {
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continue
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}
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if err3 != nil {
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panic(err3)
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}
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}
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wg.Done()
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}()
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wg.Wait()
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}
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func TestWrite0200File(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/TestWrite0200File"
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err := ioutil.WriteFile(fn, nil, 0200)
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if err != nil {
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t.Fatalf("creating empty file failed: %v", err)
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}
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fd, err := os.OpenFile(fn, os.O_WRONLY, 0)
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if err != nil {
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t.Fatal(err)
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}
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fi, err := fd.Stat()
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if err != nil {
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t.Fatal(err)
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}
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perms := fi.Mode().Perm()
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if perms != 0200 {
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t.Fatal("wrong initial permissions")
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}
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defer fd.Close()
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_, err = fd.Write(make([]byte, 10))
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if err != nil {
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t.Fatal(err)
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}
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perms = fi.Mode().Perm()
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if perms != 0200 {
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t.Fatal("wrong restored permissions")
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}
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}
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// TestMvWarnings:
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// When xattr support was introduced, mv threw warnings like these:
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// mv: preserving permissions for ‘b/x’: Operation not permitted
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// because we returned EPERM when it tried to set system.posix_acl_access.
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// Now we return EOPNOTSUPP and mv is happy.
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func TestMvWarnings(t *testing.T) {
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fn := test_helpers.TmpDir + "/TestMvWarnings"
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err := ioutil.WriteFile(fn, nil, 0600)
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if err != nil {
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t.Fatalf("creating file failed: %v", err)
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}
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cmd := exec.Command("mv", fn, test_helpers.DefaultPlainDir)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Log(string(out))
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t.Fatal(err)
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}
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if len(out) != 0 {
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t.Fatalf("Got warnings from mv:\n%s", string(out))
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}
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}
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// Check for this bug in symlink handling:
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// $ ln -s /asd/asdasd/asdasd b/foo
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// $ mv b/foo .
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// mv: listing attributes of 'b/foo': No such file or directory
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// strace shows:
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// llistxattr("b/foo", NULL, 0) = -1 ENOENT (No such file or directory)
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func TestMvWarningSymlink(t *testing.T) {
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fn := test_helpers.DefaultPlainDir + "/TestMvWarningSymlink"
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err := os.Symlink("/foo/bar/baz", fn)
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if err != nil {
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t.Fatal(err)
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}
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cmd := exec.Command("mv", fn, test_helpers.TmpDir)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Log(string(out))
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if runtime.GOOS == "darwin" {
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t.Skip("mv on darwin chokes on broken symlinks, see https://github.com/rfjakob/gocryptfs/issues/349")
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}
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t.Fatal(err)
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}
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if len(out) != 0 {
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t.Log(strings.TrimSpace(string(out)))
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t.Fatal("Got warnings")
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}
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}
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// See TestMvWarnings.
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func TestCpWarnings(t *testing.T) {
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fn := test_helpers.TmpDir + "/TestCpWarnings"
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err := ioutil.WriteFile(fn, []byte("foo"), 0600)
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if err != nil {
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t.Fatalf("creating file failed: %v", err)
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}
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cmd := exec.Command("cp", "-a", fn, test_helpers.DefaultPlainDir)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Log(string(out))
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t.Fatal(err)
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}
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if len(out) != 0 {
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t.Fatalf("Got warnings from cp -a:\n%s", string(out))
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}
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}
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func TestSeekData(t *testing.T) {
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fn := filepath.Join(test_helpers.DefaultPlainDir, t.Name())
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f, err := os.Create(fn)
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if err != nil {
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t.Fatal(err)
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}
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var oneTiB int64 = 1024 * 1024 * 1024 * 1024
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if _, err = f.Seek(oneTiB, 0); err != nil {
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t.Fatal(err)
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}
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if _, err = f.Write([]byte("foo")); err != nil {
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t.Fatal(err)
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}
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f.Close()
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const SEEK_DATA = 3
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f, err = os.Open(fn)
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if err != nil {
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t.Fatal(err)
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}
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off, err := f.Seek(1024*1024, SEEK_DATA)
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if err != nil {
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t.Fatal(err)
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}
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if off < oneTiB-1024*1024 {
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t.Errorf("off=%d, expected=%d\n", off, oneTiB)
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}
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f.Close()
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}
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/*
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TestMd5sumMaintainers tries to repro this interesting
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bug that was seen during gocryptfs v2.0 development:
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$ md5sum linux-3.0/MAINTAINERS linux-3.0/MAINTAINERS linux-3.0/MAINTAINERS linux-3.0/MAINTAINERS
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279b6ab0491e7532132e8f32afe6c04d linux-3.0/MAINTAINERS <-- WRONG!!!!
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99cc9f0dfd86e63231b94edd43a43e02 linux-3.0/MAINTAINERS <-- correct
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99cc9f0dfd86e63231b94edd43a43e02 linux-3.0/MAINTAINERS
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99cc9f0dfd86e63231b94edd43a43e02 linux-3.0/MAINTAINERS
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strace shows:
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Bad
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---
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fstat(3, {st_mode=S_IFREG|0644, st_size=196745, ...}) = 0
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read(3, "\n\tList of maintainers and how to"..., 32768) = 32768
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read(3, "M:\tSylwester Nawrocki <s.nawrock"..., 32768) = 32768
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read(3, "rs/scsi/eata*\n\nEATA ISA/EISA/PCI"..., 32768) = 32768
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read(3, "F:\tDocumentation/isapnp.txt\nF:\td"..., 32768) = 32768
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read(3, "hunkeey@googlemail.com>\nL:\tlinux"..., 32768) = 32768
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read(3, "ach-spear3xx/\n\nSPEAR6XX MACHINE "..., 32768) = 32768
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read(3, "", 32768) = 0
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lseek(3, 0, SEEK_CUR) = 196608
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close(3) = 0
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fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0x2), ...}) = 0
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write(1, "279b6ab0491e7532132e8f32afe6c04d"..., 56279b6ab0491e7532132e8f32afe6c04d linux-3.0/MAINTAINERS
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Good
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----
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fstat(3, {st_mode=S_IFREG|0644, st_size=195191, ...}) = 0
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read(3, "\n\tList of maintainers and how to"..., 32768) = 32768
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read(3, "M:\tSylwester Nawrocki <s.nawrock"..., 32768) = 32768
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read(3, "rs/scsi/eata*\n\nEATA ISA/EISA/PCI"..., 32768) = 32768
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read(3, "F:\tDocumentation/isapnp.txt\nF:\td"..., 32768) = 32768
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read(3, "hunkeey@googlemail.com>\nL:\tlinux"..., 32768) = 32768
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read(3, "ach-spear3xx/\n\nSPEAR6XX MACHINE "..., 32768) = 31351
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read(3, "", 4096) = 0
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lseek(3, 0, SEEK_CUR) = 195191
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close(3) = 0
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fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0x2), ...}) = 0
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write(1, "99cc9f0dfd86e63231b94edd43a43e02"..., 5699cc9f0dfd86e63231b94edd43a43e02 linux-3.0/MAINTAINERS
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*/
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func TestMd5sumMaintainers(t *testing.T) {
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fn := filepath.Join(test_helpers.DefaultPlainDir, t.Name())
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f, err := os.Create(fn)
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if err != nil {
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t.Fatal(err)
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}
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// Size of the MAINTAINERS file = 195191
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const sizeWant = 195191
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content := make([]byte, sizeWant)
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_, err = f.Write(content)
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if err != nil {
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t.Fatal(err)
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}
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f.Close()
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// Remount to clear the linux kernel attr cache
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// (otherwise we would have to wait 2 seconds for the entry to expire)
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test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
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test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "-zerokey")
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cmd := exec.Command("md5sum", fn, fn, fn, fn)
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out2, err := cmd.CombinedOutput()
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out := string(out2)
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// 195191 zero bytes have this md5sum
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const md5Want = "b99bf6917f688068acd49126f3b1b005"
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n := strings.Count(out, md5Want)
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if n != 4 {
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t.Errorf("found %d instead of %d instances of %q", n, 4, md5Want)
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t.Logf("full output:\n%s", out)
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}
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}
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