libgocryptfs/tests/integration_tests/main_test.go
Jakob Unterwurzacher 5da292828c fusefrontend: fix chown on dangling symlinks
We (actually, go-fuse) used to call Chown() instead of Lchown()
which meant that the operation would fail on dangling symlinks.

Fix this by calling os.Lchown() ourself. Also add a test case
for this.
2016-06-08 00:32:44 +02:00

456 lines
10 KiB
Go

package integration_tests
// File reading, writing, modification, truncate
import (
"bytes"
"crypto/md5"
"encoding/hex"
"flag"
"fmt"
"io/ioutil"
"os"
"runtime"
"sync"
"syscall"
"testing"
"github.com/rfjakob/gocryptfs/tests/test_helpers"
)
var plaintextNames bool
// This is the entry point for the tests
func TestMain(m *testing.M) {
var defaultonly bool
flag.BoolVar(&defaultonly, "defaultonly", false, "Only test default configuration (openssl=true, plaintextnames=false)")
flag.Parse()
if testing.Verbose() {
fmt.Println("***** Testing with OpenSSL")
}
test_helpers.ResetTmpDir(false) // <- this also create gocryptfs.diriv
test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey")
r := m.Run()
test_helpers.Unmount(test_helpers.DefaultPlainDir)
if r != 0 {
os.Exit(r)
}
if defaultonly {
os.Exit(r)
}
if testing.Verbose() {
fmt.Println("***** Testing with native Go crypto")
}
test_helpers.ResetTmpDir(false)
test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey", "--openssl=false")
r = m.Run()
test_helpers.Unmount(test_helpers.DefaultPlainDir)
if r != 0 {
os.Exit(r)
}
if testing.Verbose() {
fmt.Println("***** Testing \"--plaintextnames\"")
}
test_helpers.ResetTmpDir(true) // do not create gocryptfs.diriv
test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey", "--plaintextnames")
plaintextNames = true
r = m.Run()
test_helpers.Unmount(test_helpers.DefaultPlainDir)
if r != 0 {
os.Exit(r)
}
os.Exit(r)
}
// Write "n" zero bytes to filename "fn", read again, compare hash
func testWriteN(t *testing.T, fn string, n int) string {
file, err := os.Create(test_helpers.DefaultPlainDir + fn)
if err != nil {
t.Fatal(err)
}
d := make([]byte, n)
written, err := file.Write(d)
if err != nil || written != len(d) {
t.Errorf("err=\"%s\", written=%d", err, written)
}
err = file.Close()
if err != nil {
t.Error(err)
}
test_helpers.VerifySize(t, test_helpers.DefaultPlainDir+fn, n)
bin := md5.Sum(d)
hashWant := hex.EncodeToString(bin[:])
hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + fn)
if hashActual != hashWant {
t.Errorf("Wrong content, hashWant=%s hashActual=%s", hashWant, hashActual)
}
return hashActual
}
func TestWrite10(t *testing.T) {
testWriteN(t, "10", 10)
}
func TestWrite100(t *testing.T) {
testWriteN(t, "100", 100)
}
func TestWrite1M(t *testing.T) {
testWriteN(t, "1M", 1024*1024)
}
func TestWrite1Mx100(t *testing.T) {
hashWant := testWriteN(t, "1Mx100", 1024*1024)
// Read and check 100 times to catch race conditions
var i int
for i = 0; i < 100; i++ {
hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + "1M")
if hashActual != hashWant {
fmt.Printf("Read corruption in loop # %d\n", i)
t.FailNow()
} else {
//fmt.Print(".")
}
}
}
func TestTruncate(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "truncate"
file, err := os.Create(fn)
if err != nil {
t.FailNow()
}
// Grow to two blocks
file.Truncate(7000)
test_helpers.VerifySize(t, fn, 7000)
if test_helpers.Md5fn(fn) != "95d4ec7038e3e4fdbd5f15c34c3f0b34" {
t.Errorf("wrong content")
}
// Shrink - needs RMW
file.Truncate(6999)
test_helpers.VerifySize(t, fn, 6999)
if test_helpers.Md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" {
t.Errorf("wrong content")
}
// Shrink to one partial block
file.Truncate(465)
test_helpers.VerifySize(t, fn, 465)
if test_helpers.Md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" {
t.Errorf("wrong content")
}
// Grow to exactly one block
file.Truncate(4096)
test_helpers.VerifySize(t, fn, 4096)
if test_helpers.Md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" {
t.Errorf("wrong content")
}
}
func TestAppend(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "append"
file, err := os.Create(fn)
if err != nil {
t.FailNow()
}
data := []byte("testdata123456789") // length 17
var buf bytes.Buffer
var hashWant string
for i := 0; i <= 500; i++ {
file.Write(data)
buf.Write(data)
bin := md5.Sum(buf.Bytes())
hashWant = hex.EncodeToString(bin[:])
hashActual := test_helpers.Md5fn(fn)
if hashWant != hashActual {
t.FailNow()
}
}
// Overwrite with the same data
// Hash must stay the same
file.Seek(0, 0)
for i := 0; i <= 500; i++ {
file.Write(data)
hashActual := test_helpers.Md5fn(fn)
if hashWant != hashActual {
t.FailNow()
}
}
}
// Create a file with holes by writing to offset 0 (block #0) and
// offset 4096 (block #1).
func TestFileHoles(t *testing.T) {
fn := test_helpers.DefaultPlainDir + "fileholes"
file, err := os.Create(fn)
if err != nil {
t.Errorf("file create failed")
}
foo := []byte("foo")
file.Write(foo)
file.WriteAt(foo, 4096)
_, err = ioutil.ReadFile(fn)
if err != nil {
t.Error(err)
}
}
// sContains - does the slice of strings "haystack" contain "needle"?
func sContains(haystack []string, needle string) bool {
for _, element := range haystack {
if element == needle {
return true
}
}
return false
}
func TestRmwRace(t *testing.T) {
runtime.GOMAXPROCS(10)
fn := test_helpers.DefaultPlainDir + "rmwrace"
f1, err := os.Create(fn)
if err != nil {
t.Fatalf("file create failed")
}
f2, err := os.Create(fn)
if err != nil {
t.Fatalf("file create failed")
}
oldBlock := bytes.Repeat([]byte("o"), 4096)
newBlock := bytes.Repeat([]byte("n"), 4096)
shortBlock := bytes.Repeat([]byte("s"), 16)
mergedBlock := make([]byte, 4096)
copy(mergedBlock, newBlock)
copy(mergedBlock[4080:], shortBlock)
goodMd5 := make(map[string]int)
for i := 0; i < 1000; i++ {
// Reset to [ooooooooo]
_, err = f1.WriteAt(oldBlock, 0)
if err != nil {
t.Fatalf("Write failed")
}
var wg sync.WaitGroup
wg.Add(2)
// Write to the end of the file, [....ssss]
go func() {
f1.WriteAt(shortBlock, 4080)
wg.Done()
}()
// Overwrite to [nnnnnnn]
go func() {
f2.WriteAt(newBlock, 0)
wg.Done()
}()
wg.Wait()
// The file should be either:
// [nnnnnnnnnn] (md5: 6c1660fdabccd448d1359f27b3db3c99) or
// [nnnnnnssss] (md5: da885006a6a284530a427c73ce1e5c32)
// but it must not be
// [oooooossss]
buf, _ := ioutil.ReadFile(fn)
m := test_helpers.Md5hex(buf)
goodMd5[m] = goodMd5[m] + 1
/*
if m == "6c1660fdabccd448d1359f27b3db3c99" {
fmt.Println(hex.Dump(buf))
t.FailNow()
}
*/
}
if testing.Verbose() {
fmt.Println(goodMd5)
}
}
// With "--plaintextnames", the name "/gocryptfs.conf" is reserved.
// Otherwise there should be no restrictions.
func TestFiltered(t *testing.T) {
filteredFile := test_helpers.DefaultPlainDir + "gocryptfs.conf"
file, err := os.Create(filteredFile)
if plaintextNames == true && err == nil {
t.Errorf("should have failed but didn't")
} else if plaintextNames == false && err != nil {
t.Error(err)
}
file.Close()
err = os.Remove(filteredFile)
if plaintextNames == true && err == nil {
t.Errorf("should have failed but didn't")
} else if plaintextNames == false && err != nil {
t.Error(err)
}
}
func TestFilenameEncryption(t *testing.T) {
file, err := os.Create(test_helpers.DefaultPlainDir + "TestFilenameEncryption.txt")
file.Close()
if err != nil {
t.Fatal(err)
}
_, err = os.Stat(test_helpers.DefaultCipherDir + "TestFilenameEncryption.txt")
if plaintextNames == true && err != nil {
t.Errorf("plaintextnames not working: %v", err)
} else if plaintextNames == false && err == nil {
t.Errorf("file name encryption not working")
}
}
// Test Mkdir and Rmdir
func testMkdirRmdir(t *testing.T) {
test_helpers.TestMkdirRmdir(t, test_helpers.DefaultPlainDir)
}
// Test Rename
func testRename(t *testing.T) {
test_helpers.TestRename(t, test_helpers.DefaultPlainDir)
}
// Overwrite an empty directory with another directory
func TestDirOverwrite(t *testing.T) {
dir1 := test_helpers.DefaultPlainDir + "DirOverwrite1"
dir2 := test_helpers.DefaultPlainDir + "DirOverwrite2"
err := os.Mkdir(dir1, 0777)
if err != nil {
t.Fatal(err)
}
err = os.Mkdir(dir2, 0777)
if err != nil {
t.Fatal(err)
}
err = os.Rename(dir1, dir2)
if err != nil {
t.Fatal(err)
}
}
func TestLongNames(t *testing.T) {
fi, err := ioutil.ReadDir(test_helpers.DefaultCipherDir)
if err != nil {
t.Fatal(err)
}
cnt1 := len(fi)
wd := test_helpers.DefaultPlainDir
// Create file with long name
n255x := string(bytes.Repeat([]byte("x"), 255))
f, err := os.Create(wd + n255x)
if err != nil {
t.Fatalf("Could not create n255x: %v", err)
}
f.Close()
if !test_helpers.VerifyExistence(wd + n255x) {
t.Errorf("n255x is not in directory listing")
}
// Rename long to long
n255y := string(bytes.Repeat([]byte("y"), 255))
err = os.Rename(wd+n255x, wd+n255y)
if err != nil {
t.Fatalf("Could not rename n255x to n255y: %v", err)
}
if !test_helpers.VerifyExistence(wd + n255y) {
t.Errorf("n255y is not in directory listing")
}
// Rename long to short
err = os.Rename(wd+n255y, wd+"short")
if err != nil {
t.Fatalf("Could not rename n255y to short: %v", err)
}
if !test_helpers.VerifyExistence(wd + "short") {
t.Errorf("short is not in directory listing")
}
// Rename short to long
err = os.Rename(wd+"short", wd+n255x)
if err != nil {
t.Fatalf("Could not rename short to n255x: %v", err)
}
if !test_helpers.VerifyExistence(wd + n255x) {
t.Errorf("255x is not in directory listing II")
}
// Unlink
err = syscall.Unlink(wd + n255x)
if err != nil {
t.Fatalf("Could not unlink n255x: %v", err)
}
if test_helpers.VerifyExistence(wd + n255x) {
t.Errorf("n255x still there after unlink")
}
// Long symlink
n255s := string(bytes.Repeat([]byte("s"), 255))
err = os.Symlink("/etc/motd", wd+n255s)
if err != nil {
t.Fatal(err)
}
if !test_helpers.VerifyExistence(wd + n255s) {
t.Errorf("n255s is not in directory listing")
}
err = syscall.Unlink(wd + n255s)
if err != nil {
t.Error(err)
}
// Long dir
n255d := string(bytes.Repeat([]byte("d"), 255))
err = os.Mkdir(wd+n255d, 0777)
if err != nil {
t.Fatal(err)
}
err = syscall.Rmdir(wd + n255d)
if err != nil {
t.Error(err)
}
// Check for orphaned files
fi, err = ioutil.ReadDir(test_helpers.DefaultCipherDir)
if err != nil {
t.Fatal(err)
}
cnt2 := len(fi)
if cnt1 != cnt2 {
t.Errorf("Leftover files, cnt1=%d cnt2=%d", cnt1, cnt2)
}
}
func TestLchown(t *testing.T) {
name := test_helpers.DefaultPlainDir + "symlink"
err := os.Symlink("/target/does/not/exist", name)
if err != nil {
t.Fatal(err)
}
err = os.Chown(name, os.Getuid(), os.Getgid())
if err == nil {
t.Error("Chown on dangling symlink should fail")
}
err = os.Lchown(name, os.Getuid(), os.Getgid())
if err != nil {
t.Error(err)
}
}