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package test_helpers
import (
"crypto/md5"
"encoding/hex"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"syscall"
"testing"
"github.com/rfjakob/gocryptfs/internal/nametransform"
)
// Note: the code assumes that all have a trailing slash
const TmpDir = "/tmp/gocryptfs_main_test/"
const DefaultPlainDir = TmpDir + "plain/"
const DefaultCipherDir = TmpDir + "cipher/"
const GocryptfsBinary = "../../gocryptfs"
// ResetTmpDir - delete old tmp dir, create new one, write gocryptfs.diriv
func ResetTmpDir(plaintextNames bool) {
// Try to unmount everything
entries, err := ioutil.ReadDir(TmpDir)
if err == nil {
for _, e := range entries {
fu := exec.Command("fusermount", "-z", "-u", filepath.Join(TmpDir, e.Name()))
fu.Run()
}
}
err = os.RemoveAll(TmpDir)
if err != nil {
fmt.Println("resetTmpDir: RemoveAll:" + err.Error())
os.Exit(1)
}
err = os.MkdirAll(DefaultPlainDir, 0777)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
err = os.MkdirAll(DefaultCipherDir, 0777)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if !plaintextNames {
err = nametransform.WriteDirIV(DefaultCipherDir)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
}
// Mount CIPHERDIR "c" on PLAINDIR "p"
func Mount(c string, p string, extraArgs ...string) error {
var args []string
args = append(args, extraArgs...)
args = append(args, "-nosyslog", "-q", "-wpanic")
//args = append(args, "-fusedebug")
//args = append(args, "-d")
args = append(args, c)
args = append(args, p)
cmd := exec.Command(GocryptfsBinary, args...)
cmd.Stderr = os.Stderr
if testing.Verbose() {
cmd.Stdout = os.Stdout
}
return cmd.Run()
}
// MountOrExit calls mount() and exits on failure.
func MountOrExit(c string, p string, extraArgs ...string) {
err := Mount(c, p, extraArgs...)
if err != nil {
fmt.Printf("mount failed: %v", err)
os.Exit(1)
}
}
// MountOrFatal calls mount() and calls t.Fatal() on failure.
func MountOrFatal(t *testing.T, c string, p string, extraArgs ...string) {
err := Mount(c, p, extraArgs...)
if err != nil {
t.Fatal(fmt.Errorf("mount failed: %v", err))
}
}
// Unmount PLAINDIR "p"
func Unmount(p string) error {
fu := exec.Command("fusermount", "-u", "-z", p)
fu.Stdout = os.Stdout
fu.Stderr = os.Stderr
err := fu.Run()
if err != nil {
fmt.Println(err)
}
return err
}
// Return md5 string for file "filename"
func Md5fn(filename string) string {
buf, err := ioutil.ReadFile(filename)
if err != nil {
fmt.Printf("ReadFile: %v\n", err)
return ""
}
return Md5hex(buf)
}
// Return md5 string for "buf"
func Md5hex(buf []byte) string {
rawHash := md5.Sum(buf)
hash := hex.EncodeToString(rawHash[:])
return hash
}
// Verify that the file size equals "want". This checks:
// 1) Size reported by Stat()
// 2) Number of bytes returned when reading the whole file
func VerifySize(t *testing.T, path string, want int) {
buf, err := ioutil.ReadFile(path)
if err != nil {
t.Errorf("ReadFile failed: %v", err)
} else if len(buf) != want {
t.Errorf("wrong read size: got=%d want=%d", len(buf), want)
}
fi, err := os.Stat(path)
if err != nil {
t.Errorf("Stat failed: %v", err)
} else if fi.Size() != int64(want) {
t.Errorf("wrong stat file size, got=%d want=%d", fi.Size(), want)
}
}
// Create and delete a directory
func TestMkdirRmdir(t *testing.T, plainDir string) {
dir := plainDir + "dir1"
err := os.Mkdir(dir, 0777)
if err != nil {
t.Fatal(err)
}
err = syscall.Rmdir(dir)
if err != nil {
t.Fatal(err)
}
// Removing a non-empty dir should fail with ENOTEMPTY
if os.Mkdir(dir, 0777) != nil {
t.Fatal(err)
}
f, err := os.Create(dir + "/file")
if err != nil {
t.Fatal(err)
}
f.Close()
err = syscall.Rmdir(dir)
errno := err.(syscall.Errno)
if errno != syscall.ENOTEMPTY {
t.Errorf("Should have gotten ENOTEMPTY, go %v", errno)
}
if syscall.Unlink(dir+"/file") != nil {
t.Fatal(err)
}
if syscall.Rmdir(dir) != nil {
t.Fatal(err)
}
// We should also be able to remove a directory we do not have permissions to
// read or write
err = os.Mkdir(dir, 0000)
if err != nil {
t.Fatal(err)
}
err = syscall.Rmdir(dir)
if err != nil {
// Make sure the directory can cleaned up by the next test run
os.Chmod(dir, 0700)
t.Fatal(err)
}
}
// Create and rename a file
func TestRename(t *testing.T, plainDir string) {
file1 := plainDir + "rename1"
file2 := plainDir + "rename2"
err := ioutil.WriteFile(file1, []byte("content"), 0777)
if err != nil {
t.Fatal(err)
}
err = syscall.Rename(file1, file2)
if err != nil {
t.Fatal(err)
}
syscall.Unlink(file2)
}
// verifyExistence - check in 3 ways that "path" exists:
// stat, open, readdir
func VerifyExistence(path string) bool {
// Check that file can be stated
_, err := os.Stat(path)
if err != nil {
//t.Log(err)
return false
}
// Check that file can be opened
fd, err := os.Open(path)
if err != nil {
//t.Log(err)
return false
}
fd.Close()
// Check that file shows up in directory listing
dir := filepath.Dir(path)
name := filepath.Base(path)
fi, err := ioutil.ReadDir(dir)
if err != nil {
//t.Log(err)
return false
}
for _, i := range fi {
if i.Name() == name {
return true
}
}
return false
}
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