libgocryptfs/tests/cli/cli_test.go
Jakob Unterwurzacher 1eaf1211a2 tests/cli: Check for leftover socket file
This fails at the moment:

$ go test ./tests/cli/
--- FAIL: TestMountPasswordEmpty (0.01s)
    cli_test.go:430: socket file "/tmp/gocryptfs-test-parent-1026/3413782690/TestMountPasswordEmpty.753166857.sock" left behind

https://github.com/rfjakob/gocryptfs/issues/634
2022-01-03 14:27:52 +01:00

1019 lines
28 KiB
Go

// package cli tests CLI operations like "-init", "-password" etc
package cli
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"strconv"
"strings"
"sync"
"syscall"
"testing"
"time"
"github.com/rfjakob/gocryptfs/v2/internal/configfile"
"github.com/rfjakob/gocryptfs/v2/internal/exitcodes"
"github.com/rfjakob/gocryptfs/v2/internal/nametransform"
"github.com/rfjakob/gocryptfs/v2/tests/test_helpers"
)
var testPw = []byte("test")
func TestMain(m *testing.M) {
test_helpers.ResetTmpDir(false)
before := test_helpers.ListFds(0, "")
r := m.Run()
after := test_helpers.ListFds(0, "")
if len(before) != len(after) {
fmt.Printf("fd leak in test process? before, after:\n%v\n%v\n", before, after)
os.Exit(1)
}
os.Exit(r)
}
// Test -init flag
func TestInit(t *testing.T) {
dir := test_helpers.InitFS(t)
_, c, err := configfile.LoadAndDecrypt(dir+"/"+configfile.ConfDefaultName, testPw)
if err != nil {
t.Fatal(err)
}
if c.IsFeatureFlagSet(configfile.FlagAESSIV) {
t.Error("AESSIV flag should not be set")
}
}
// Test that gocryptfs.conf and gocryptfs.diriv are there with the expected
// permissions after -init
func TestInitFilePerms(t *testing.T) {
dir := test_helpers.InitFS(t)
var st syscall.Stat_t
syscall.Stat(dir+"/gocryptfs.conf", &st)
perms := st.Mode & 0777
if perms != 0400 {
t.Errorf("Wrong permissions for gocryptfs.conf: %#o", perms)
}
st = syscall.Stat_t{}
syscall.Stat(dir+"/gocryptfs.diriv", &st)
perms = st.Mode & 0777
// From v1.7.1, these are created with 0440 permissions, see
// https://github.com/rfjakob/gocryptfs/issues/387 .
// From v2.0, created with 0444 perms, see
// https://github.com/rfjakob/gocryptfs/issues/539 .
if perms != 0444 {
t.Errorf("Wrong permissions for gocryptfs.diriv: %#o", perms)
}
}
// Test -init with -devrandom flag
func TestInitDevRandom(t *testing.T) {
test_helpers.InitFS(t, "-devrandom")
}
// Test -init with -aessiv
func TestInitAessiv(t *testing.T) {
dir := test_helpers.InitFS(t, "-aessiv")
_, c, err := configfile.LoadAndDecrypt(dir+"/"+configfile.ConfDefaultName, testPw)
if err != nil {
t.Fatal(err)
}
if !c.IsFeatureFlagSet(configfile.FlagAESSIV) {
t.Error("AESSIV flag should be set but is not")
}
}
// Test -init with -reverse
func TestInitReverse(t *testing.T) {
dir := test_helpers.InitFS(t, "-reverse")
_, c, err := configfile.LoadAndDecrypt(dir+"/"+configfile.ConfReverseName, testPw)
if err != nil {
t.Fatal(err)
}
if !c.IsFeatureFlagSet(configfile.FlagAESSIV) {
t.Error("AESSIV flag should be set but is not")
}
}
// testPasswd changes the password from "test" to "test" using
// the -extpass method, then from "test" to "newpasswd" using the
// stdin method.
func testPasswd(t *testing.T, dir string, extraArgs ...string) {
// Change password using "-extpass"
args := []string{"-q", "-passwd", "-extpass", "echo test"}
args = append(args, extraArgs...)
args = append(args, dir)
cmd := exec.Command(test_helpers.GocryptfsBinary, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
t.Error(err)
}
// Change password using stdin
args = []string{"-q", "-passwd"}
args = append(args, extraArgs...)
args = append(args, dir)
cmd = exec.Command(test_helpers.GocryptfsBinary, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
p, err := cmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
err = cmd.Start()
if err != nil {
t.Error(err)
}
// Old password
p.Write([]byte("test\n"))
// New password
p.Write([]byte("newpasswd\n"))
p.Close()
err = cmd.Wait()
if err != nil {
t.Error(err)
}
}
// Test -passwd flag
func TestPasswd(t *testing.T) {
// Create FS
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
// Add content
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo test")
file1 := mnt + "/file1"
err := ioutil.WriteFile(file1, []byte("somecontent"), 0600)
if err != nil {
t.Fatal(err)
}
err = test_helpers.UnmountErr(mnt)
if err != nil {
t.Fatal(err)
}
// Change password to "newpasswd"
testPasswd(t, dir)
// Mount and verify
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo newpasswd")
content, err := ioutil.ReadFile(file1)
if err != nil {
t.Error(err)
} else if string(content) != "somecontent" {
t.Errorf("wrong content: %q", string(content))
}
err = test_helpers.UnmountErr(mnt)
if err != nil {
t.Fatal(err)
}
}
// cp copies file at `src` to `dst`, overwriting
// `dst` if it already exists. Calls t.Fatal on failure.
func cp(t *testing.T, src string, dst string) {
conf, err := ioutil.ReadFile(src)
if err != nil {
t.Fatal(err)
}
syscall.Unlink(dst)
err = ioutil.WriteFile(dst, conf, 0600)
if err != nil {
t.Fatal(err)
}
}
// Test -passwd with -masterkey
func TestPasswdMasterkey(t *testing.T) {
// Create FS
dir := test_helpers.InitFS(t)
// Overwrite with config with known master key
cp(t, "gocryptfs.conf.b9e5ba23", dir+"/gocryptfs.conf")
// Add content
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo test")
file1 := mnt + "/file1"
err := ioutil.WriteFile(file1, []byte("somecontent"), 0600)
if err != nil {
t.Fatal(err)
}
test_helpers.UnmountPanic(mnt)
// Change password using stdin
args := []string{"-q", "-passwd", "-masterkey",
"b9e5ba23-981a22b8-c8d790d8-627add29-f680513f-b7b7035f-d203fb83-21d82205"}
args = append(args, dir)
cmd := exec.Command(test_helpers.GocryptfsBinary, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
p, err := cmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
err = cmd.Start()
if err != nil {
t.Error(err)
}
// New password
p.Write([]byte("newpasswd\n"))
p.Close()
err = cmd.Wait()
if err != nil {
t.Error(err)
}
// Mount and verify
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo newpasswd")
content, err := ioutil.ReadFile(file1)
if err != nil {
t.Error(err)
} else if string(content) != "somecontent" {
t.Errorf("wrong content: %q", string(content))
}
test_helpers.UnmountPanic(mnt)
}
// Test -passwd with -masterkey=stdin
func TestPasswdMasterkeyStdin(t *testing.T) {
// Create FS
dir := test_helpers.InitFS(t)
// Overwrite with config with known master key
cp(t, "gocryptfs.conf.b9e5ba23", dir+"/gocryptfs.conf")
// Add content
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo test")
file1 := mnt + "/file1"
err := ioutil.WriteFile(file1, []byte("somecontent"), 0600)
if err != nil {
t.Fatal(err)
}
test_helpers.UnmountPanic(mnt)
// Change password using stdin
args := []string{"-q", "-passwd", "-masterkey=stdin"}
args = append(args, dir)
cmd := exec.Command(test_helpers.GocryptfsBinary, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
p, err := cmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
err = cmd.Start()
if err != nil {
t.Error(err)
}
// Masterkey
p.Write([]byte("b9e5ba23-981a22b8-c8d790d8-627add29-f680513f-b7b7035f-d203fb83-21d82205\n"))
// New password
p.Write([]byte("newpasswd\n"))
p.Close()
err = cmd.Wait()
if err != nil {
t.Fatal(err)
}
// Mount and verify
test_helpers.MountOrFatal(t, dir, mnt, "-extpass", "echo newpasswd")
content, err := ioutil.ReadFile(file1)
if err != nil {
t.Fatal(err)
} else if string(content) != "somecontent" {
t.Errorf("wrong content: %q", string(content))
}
test_helpers.UnmountPanic(mnt)
}
// Test -passwd with -reverse
func TestPasswdReverse(t *testing.T) {
// Create FS
dir := test_helpers.InitFS(t, "-reverse")
testPasswd(t, dir, "-reverse")
}
// Test -passwd with -scryptn
func TestPasswdScryptn(t *testing.T) {
dir := test_helpers.InitFS(t)
cf, err := configfile.Load(dir + "/gocryptfs.conf")
if err != nil {
t.Fatal(err)
}
testPasswd(t, dir, "-scryptn", strconv.Itoa(cf.ScryptObject.LogN()+1))
cf2, err := configfile.Load(dir + "/gocryptfs.conf")
if err != nil {
t.Fatal(err)
}
if cf2.ScryptObject.LogN() != cf.ScryptObject.LogN()+1 {
t.Errorf("wrong logN value %d", cf2.ScryptObject.LogN())
}
}
// Test -init & -config flag
func TestInitConfig(t *testing.T) {
config := test_helpers.TmpDir + "/TestInitConfig.conf"
dir := test_helpers.InitFS(t, "-config="+config)
_, err := os.Stat(config)
if err != nil {
t.Fatal(err)
}
// Test -passwd & -config
cmd2 := exec.Command(test_helpers.GocryptfsBinary, "-q", "-passwd", "-extpass", "echo test",
"-config", config, dir)
cmd2.Stdout = os.Stdout
cmd2.Stderr = os.Stderr
err = cmd2.Run()
if err != nil {
t.Error(err)
}
}
// Test -ro
func TestRo(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-ro", "-extpass=echo test")
defer test_helpers.UnmountPanic(mnt)
file := mnt + "/file"
err := os.Mkdir(file, 0777)
if err == nil {
t.Errorf("Mkdir should have failed")
}
_, err = os.Create(file)
if err == nil {
t.Errorf("Create should have failed")
}
}
// Test "-nonempty"
func TestNonempty(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := os.Mkdir(mnt, 0700)
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile(mnt+"/somefile", []byte("xyz"), 0600)
if err != nil {
t.Fatal(err)
}
err = test_helpers.Mount(dir, mnt, false, "-extpass=echo test")
if err == nil {
t.Errorf("Mounting over a file should fail per default")
}
// Should work with "-nonempty"
test_helpers.MountOrFatal(t, dir, mnt, "-nonempty", "-extpass=echo test")
test_helpers.UnmountPanic(mnt)
}
// -nofail should be ignored and the mount should succeed
func TestNofail(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-nofail", "-extpass=echo test")
defer test_helpers.UnmountPanic(mnt)
}
// Test "mountpoint shadows cipherdir" handling
func TestShadows(t *testing.T) {
mnt := test_helpers.InitFS(t)
cipher := mnt + ".cipher"
err := os.Rename(mnt, cipher)
if err != nil {
t.Fatal(err)
}
// This should work
// (note that MountOrFatal creates "mnt" again)
test_helpers.MountOrFatal(t, cipher, mnt, "-extpass=echo test")
test_helpers.UnmountPanic(mnt)
cipher2 := mnt + "/cipher"
err = os.Rename(cipher, cipher2)
if err != nil {
t.Fatal(err)
}
// This should fail
err = test_helpers.Mount(cipher2, mnt, false, "-extpass=echo test")
if err == nil {
t.Errorf("Should have failed")
}
}
// TestMountPasswordIncorrect makes sure the correct exit code is used when the password
// was incorrect while mounting.
// Also checks that we don't leave a socket file behind.
func TestMountPasswordIncorrect(t *testing.T) {
cDir := test_helpers.InitFS(t) // Create filesystem with password "test"
ctlSock := cDir + ".sock"
pDir := cDir + ".mnt"
err := test_helpers.Mount(cDir, pDir, false, "-extpass", "echo WRONG", "-wpanic=false", "-ctlsock", ctlSock)
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.PasswordIncorrect {
t.Errorf("want=%d, got=%d", exitcodes.PasswordIncorrect, exitCode)
}
if _, err := os.Stat(ctlSock); err == nil {
t.Errorf("socket file %q left behind", ctlSock)
}
}
// TestMountPasswordEmpty makes sure the correct exit code is used when the password
// was empty while mounting.
// Also checks that we don't leave a socket file behind (https://github.com/rfjakob/gocryptfs/issues/634).
func TestMountPasswordEmpty(t *testing.T) {
cDir := test_helpers.InitFS(t) // Create filesystem with password "test"
ctlSock := cDir + ".sock"
pDir := cDir + ".mnt"
err := test_helpers.Mount(cDir, pDir, false, "-extpass", "true", "-wpanic=false", "-ctlsock", ctlSock)
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.ReadPassword {
t.Errorf("want=%d, got=%d", exitcodes.ReadPassword, exitCode)
}
if _, err := os.Stat(ctlSock); err == nil {
t.Errorf("socket file %q left behind", ctlSock)
}
}
// TestPasswdPasswordIncorrect makes sure the correct exit code is used when the password
// was incorrect while changing the password
func TestPasswdPasswordIncorrect(t *testing.T) {
cDir := test_helpers.InitFS(t) // Create filesystem with password "test"
// Change password
cmd := exec.Command(test_helpers.GocryptfsBinary, "-passwd", cDir)
childStdin, err := cmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
err = cmd.Start()
if err != nil {
t.Fatal(err)
}
_, err = childStdin.Write([]byte("WRONGPASSWORD\nNewPassword"))
if err != nil {
t.Fatal(err)
}
err = childStdin.Close()
if err != nil {
t.Fatal(err)
}
err = cmd.Wait()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.PasswordIncorrect {
t.Errorf("want=%d, got=%d", exitcodes.PasswordIncorrect, exitCode)
}
}
// Check that we correctly background on mount and close stderr and stdout.
// Something like
// gocryptfs a b | cat
// must not hang ( https://github.com/rfjakob/gocryptfs/issues/130 ).
func TestMountBackground(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := os.Mkdir(mnt, 0700)
if err != nil {
t.Fatal(err)
}
// Manually create a pipe pair and connect the child's stdout and stderr
// to it. We cannot use StdoutPipe because that will close the pipe
// when the child forks away.
pr, pw, err := os.Pipe()
if err != nil {
t.Fatal(err)
}
args := []string{"-extpass", "echo test", dir, mnt}
cmd := exec.Command(test_helpers.GocryptfsBinary, args...)
cmd.Stdout = pw
cmd.Stderr = pw
err = cmd.Run()
if err != nil {
t.Error(err)
}
pw.Close()
defer test_helpers.UnmountPanic(mnt)
// Read until we get EOF.
c1 := make(chan struct{}, 1)
go func() {
buf := make([]byte, 1000)
for {
_, err = pr.Read(buf)
// We should get io.EOF when the child closes stdout
// and stderr.
if err != nil {
pr.Close()
c1 <- struct{}{}
return
}
}
}()
select {
case <-c1:
return
case <-time.After(time.Second * 5):
t.Fatal("timeout")
}
}
// Test that "gocryptfs -init -info CIPHERDIR" returns an error to the
// user. Only one operation flag is allowed.
func TestMultipleOperationFlags(t *testing.T) {
// Test all combinations
opFlags := []string{"-init", "-info", "-passwd", "-fsck"}
for _, flag1 := range opFlags {
var flag2 string
for _, flag2 = range opFlags {
if flag1 == flag2 {
continue
}
args := []string{flag1, flag2, "/tmp"}
//t.Logf("testing %v", args)
cmd := exec.Command(test_helpers.GocryptfsBinary, args...)
err := cmd.Run()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.Usage {
t.Fatalf("this should have failed with code %d, but returned %d",
exitcodes.Usage, exitCode)
}
}
}
}
func TestNoexec(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-extpass=echo test", "-noexec")
defer test_helpers.UnmountPanic(mnt)
sh := mnt + "/x.sh"
content := `#!/bin/bash
echo hello
`
err := ioutil.WriteFile(sh, []byte(content), 0755)
if err != nil {
t.Fatal(err)
}
err = exec.Command(sh).Run()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != int(syscall.EACCES) {
t.Errorf("got exitcode %d instead of EPERM (%d)", exitCode, syscall.EPERM)
}
}
// Test that a missing argument to "-o" triggers exit code 1.
// See also cli_args_test.go for comprehensive tests of "-o" parsing.
func TestMissingOArg(t *testing.T) {
cmd := exec.Command(test_helpers.GocryptfsBinary, "foo", "bar", "-o")
err := cmd.Run()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.Usage {
t.Fatalf("this should have failed with code %d, but returned %d",
exitcodes.Usage, exitCode)
}
}
// -exclude must return an error in forward mode
func TestExcludeForward(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := test_helpers.Mount(dir, mnt, false, "-extpass", "echo test", "-exclude", "foo")
if err == nil {
t.Errorf("-exclude in forward mode should fail")
}
t.Log(err)
}
// Check that the config file can be read from a named pipe.
// Make sure bug https://github.com/rfjakob/gocryptfs/issues/258 does not come
// back.
func TestConfigPipe(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := os.Mkdir(mnt, 0700)
if err != nil {
t.Fatal(err)
}
bashLine := fmt.Sprintf("%s -q -extpass \"echo test\" -config <(cat %s/gocryptfs.conf) %s %s", test_helpers.GocryptfsBinary, dir, dir, mnt)
cmd := exec.Command("bash", "-c", bashLine)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stdout
err = cmd.Run()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != 0 {
t.Errorf("bash command\n%q\nresulted in exit code %d", bashLine, exitCode)
return
}
test_helpers.UnmountPanic(mnt)
}
// Ciphertext dir and mountpoint contains a comma
// https://github.com/rfjakob/gocryptfs/issues/262
func TestComma(t *testing.T) {
dir0 := test_helpers.InitFS(t)
dir := dir0 + ",foo,bar"
err := os.Rename(dir0, dir)
if err != nil {
t.Fatal(err)
}
mnt := dir + ".mnt"
err = test_helpers.Mount(dir, mnt, false, "-extpass", "echo test", "-wpanic=0")
if err != nil {
t.Fatalf("Failed to mount %q on %q: %v", dir, mnt, err)
}
test_helpers.UnmountPanic(mnt)
}
// Mount with idle timeout 10ms and check that the process exits by itself
// within 5 seconds.
func TestIdle(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := os.Mkdir(mnt, 0700)
if err != nil {
t.Fatal(err)
}
cmd := exec.Command(test_helpers.GocryptfsBinary,
"-q", "-nosyslog", "-fg", "-extpass", "echo test", "-i", "10ms", dir, mnt)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err = cmd.Start()
if err != nil {
t.Fatal(err)
}
timer := time.AfterFunc(5*time.Second, func() {
t.Error("timeout waiting for umount")
cmd.Process.Kill()
})
err = cmd.Wait()
timer.Stop()
if err != nil {
t.Error(err)
}
}
// Mount with idle timeout of 100ms read something every 10ms. The fs should
// NOT get unmounted. Regression test for https://github.com/rfjakob/gocryptfs/issues/421
func TestNotIdle(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
err := test_helpers.Mount(dir, mnt, false, "-extpass", "echo test", "-i=100ms")
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile(mnt+"/foo", []byte("foo"), 0600)
if err != nil {
t.Fatal(err)
}
// Read every 10 milliseconds for a total of 1 second
for i := 1; i < 100; i++ {
_, err = ioutil.ReadFile(mnt + "/foo")
if err != nil {
t.Fatalf("iteration %d failed: %v", i, err)
}
time.Sleep(10 * time.Millisecond)
}
// Keep a file handle open for 1 second
fd, err := os.Open(mnt + "/foo")
if err != nil {
t.Fatal(err)
}
time.Sleep(1 * time.Second)
buf := make([]byte, 100)
_, err = fd.Read(buf)
if err != nil {
t.Fatal(err)
}
fd.Close()
// All good.
test_helpers.UnmountPanic(mnt)
}
// TestSymlinkedCipherdir checks that if CIPHERDIR itself is a symlink, it is
// followed.
// https://github.com/rfjakob/gocryptfs/issues/450
func TestSymlinkedCipherdir(t *testing.T) {
dir := test_helpers.InitFS(t)
dirSymlink := dir + ".symlink"
err := os.Symlink(dir, dirSymlink)
if err != nil {
t.Fatal(err)
}
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dirSymlink, mnt, "-extpass=echo test")
defer test_helpers.UnmountPanic(mnt)
file := mnt + "/file"
f, err := os.Create(file)
if err != nil {
t.Fatal(err)
}
f.Close()
f, err = os.Open(mnt)
if err != nil {
t.Fatal(err)
}
defer f.Close()
names, err := f.Readdirnames(0)
if err != nil {
t.Fatal(err)
}
if len(names) != 1 || names[0] != "file" {
t.Errorf("wrong Readdirnames result: %v", names)
}
}
// TestBadname tests the `-badname` option
//
// Supported structure of badname: <ciphername><badname pattern><badname suffix>
// "Visible" shows the success of function DecryptName (cipher -> plain)
// "Access" shows the success of function EncryptAndHashBadName (plain -> cipher)
// Case Visible Access Description
// Case 1 x x Access file without BadName suffix (default mode)
// Case 2 x x Access file with BadName suffix which has a valid cipher file (will only be possible if file was created without badname option)
// Case 3 Access file with valid ciphername + BadName suffix (impossible since this would not be produced by DecryptName)
// Case 4 x x Access file with decryptable part of name and Badname suffix (default badname case)
// Case 5 x x Access file with undecryptable name and BadName suffix (e. g. when part of the cipher name was cut)
// Case 6 x Access file with multiple possible matches.
// Case 7 Access file with BadName suffix and non-matching pattern
func TestBadname(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
validFileName := "file"
invalidSuffix := "_invalid_file"
var contentCipher [7][]byte
//first mount without badname (see case 2)
test_helpers.MountOrFatal(t, dir, mnt, "-extpass=echo test", "-wpanic=false")
file := mnt + "/" + validFileName
// Case 1: write one valid filename (empty content)
err := ioutil.WriteFile(file, nil, 0600)
if err != nil {
t.Fatal(err)
}
// read encrypted file name
fread, err := os.Open(dir)
if err != nil {
t.Fatal(err)
}
defer fread.Close()
encryptedfilename := ""
ciphernames, err := fread.Readdirnames(0)
if err != nil {
t.Fatal(err)
}
for _, ciphername := range ciphernames {
if ciphername != "gocryptfs.conf" && ciphername != "gocryptfs.diriv" {
encryptedfilename = ciphername
// found cipher name of "file"
break
}
}
//Generate valid cipherdata for all cases
for i := 0; i < len(contentCipher); i++ {
err := ioutil.WriteFile(file, []byte(fmt.Sprintf("Content Case %d.", i+1)), 0600)
if err != nil {
t.Fatal(err)
}
//save the cipher data for file operations in cipher dir
contentCipher[i], err = ioutil.ReadFile(dir + "/" + encryptedfilename)
if err != nil {
t.Fatal(err)
}
}
//re-write content for case 1
err = ioutil.WriteFile(file, []byte("Content Case 1."), 0600)
if err != nil {
t.Fatal(err)
}
// Case 2: File with invalid suffix in plain name but valid cipher file
file = mnt + "/" + validFileName + nametransform.BadnameSuffix
err = ioutil.WriteFile(file, []byte("Content Case 2."), 0600)
if err != nil {
t.Fatal(err)
}
// unmount...
test_helpers.UnmountPanic(mnt)
// ...and remount with -badname.
test_helpers.MountOrFatal(t, dir, mnt, "-badname=*valid*", "-extpass=echo test", "-wpanic=false")
defer test_helpers.UnmountPanic(mnt)
// Case 3 is impossible: only BadnameSuffix would mean the cipher name is valid
// Case 4: write invalid file which should be decodable
err = ioutil.WriteFile(dir+"/"+encryptedfilename+invalidSuffix, contentCipher[3], 0600)
if err != nil {
t.Fatal(err)
}
//Case 5: write invalid file which is not decodable (replace last 2 bytes with percent sign)
err = ioutil.WriteFile(dir+"/"+encryptedfilename[:len(encryptedfilename)-2]+"%%"+invalidSuffix, contentCipher[4], 0600)
if err != nil {
t.Fatal(err)
}
// Case 6: Multiple possible matches
// generate two files with invalid cipher names which can both match the badname pattern
err = ioutil.WriteFile(dir+"/mzaZRF9_0IU-_5vv2wPC"+invalidSuffix, contentCipher[5], 0600)
if err != nil {
t.Fatal(err)
}
err = ioutil.WriteFile(dir+"/mzaZRF9_0IU-_5vv2wP"+invalidSuffix, contentCipher[5], 0600)
if err != nil {
t.Fatal(err)
}
// Case 7: Non-Matching badname pattern
err = ioutil.WriteFile(dir+"/"+encryptedfilename+"wrongPattern", contentCipher[6], 0600)
if err != nil {
t.Fatal(err)
}
// check for filenames
f, err := os.Open(mnt)
if err != nil {
t.Fatal(err)
}
defer f.Close()
names, err := f.Readdirnames(0)
if err != nil {
t.Fatal(err)
}
searchstrings := []string{
validFileName,
validFileName + nametransform.BadnameSuffix,
"",
validFileName + invalidSuffix + nametransform.BadnameSuffix,
encryptedfilename[:len(encryptedfilename)-2] + "%%" + invalidSuffix + nametransform.BadnameSuffix,
"",
validFileName + "wrongPattern" + nametransform.BadnameSuffix}
results := []bool{false, false, true, false, false, true, true}
var filecontent string
var filebytes []byte
for _, name := range names {
if name == searchstrings[0] {
//Case 1: Test access
filebytes, err = ioutil.ReadFile(mnt + "/" + name)
if err != nil {
t.Fatal(err)
}
filecontent = string(filebytes)
if filecontent == "Content Case 1." {
results[0] = true
}
} else if name == searchstrings[1] {
//Case 2: Test Access
filebytes, err = ioutil.ReadFile(mnt + "/" + name)
if err != nil {
t.Fatal(err)
}
filecontent = string(filebytes)
if filecontent == "Content Case 2." {
results[1] = true
}
} else if name == searchstrings[3] {
//Case 4: Test Access
filebytes, err = ioutil.ReadFile(mnt + "/" + name)
if err != nil {
t.Fatal(err)
}
filecontent = string(filebytes)
if filecontent == "Content Case 4." {
results[3] = true
}
} else if name == searchstrings[4] {
//Case 5: Test Access
filebytes, err = ioutil.ReadFile(mnt + "/" + name)
if err != nil {
t.Fatal(err)
}
filecontent = string(filebytes)
if filecontent == "Content Case 5." {
results[4] = true
}
} else if name == searchstrings[6] {
//Case 7
results[6] = false
}
//Case 3 is always passed
//Case 6 is highly obscure:
//The last part of a valid cipher name must match the badname pattern AND
//the remaining cipher name must still be decryptable. Test case not programmable in a general case
}
for i := 0; i < len(results); i++ {
if !results[i] {
t.Errorf("Case %d failed: %q in [%q]", i+1, searchstrings[i], strings.Join(names, ","))
}
}
}
// TestPassfile tests the `-passfile` option
func TestPassfile(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
passfile1 := mnt + ".1.txt"
ioutil.WriteFile(passfile1, []byte("test"), 0600)
test_helpers.MountOrFatal(t, dir, mnt, "-passfile="+passfile1)
defer test_helpers.UnmountPanic(mnt)
}
// TestPassfileX2 tests that the `-passfile` option can be passed twice
func TestPassfileX2(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
passfile1 := mnt + ".1.txt"
passfile2 := mnt + ".2.txt"
ioutil.WriteFile(passfile1, []byte("te"), 0600)
ioutil.WriteFile(passfile2, []byte("st"), 0600)
test_helpers.MountOrFatal(t, dir, mnt, "-passfile="+passfile1, "-passfile="+passfile2)
defer test_helpers.UnmountPanic(mnt)
}
// TestInitNotEmpty checks that `gocryptfs -init` returns the right error code
// if CIPHERDIR is not empty. See https://github.com/rfjakob/gocryptfs/pull/503
func TestInitNotEmpty(t *testing.T) {
dir := test_helpers.TmpDir + "/" + t.Name()
if err := os.Mkdir(dir, 0700); err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(dir+"/foo", nil, 0700); err != nil {
t.Fatal(err)
}
cmd := exec.Command(test_helpers.GocryptfsBinary, "-init", "-extpass", "echo test", dir)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.CipherDir {
t.Fatalf("wrong exit code: have=%d, want=%d", exitCode, exitcodes.CipherDir)
}
}
// TestSharedstorage checks that `-sharedstorage` shows stable inode numbers to
// userpsace despite having hard link tracking disabled
func TestSharedstorage(t *testing.T) {
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
test_helpers.MountOrFatal(t, dir, mnt, "-extpass=echo test", "-sharedstorage")
defer test_helpers.UnmountPanic(mnt)
foo1 := mnt + "/foo1"
foo2 := mnt + "/foo2"
if err := ioutil.WriteFile(foo1, nil, 0755); err != nil {
t.Fatal(err)
}
if err := os.Link(foo1, foo2); err != nil {
t.Fatal(err)
}
var st1, st2 syscall.Stat_t
if err := syscall.Stat(foo1, &st1); err != nil {
t.Fatal(err)
}
// The link show show a new inode number
if err := syscall.Stat(foo2, &st2); err != nil {
t.Fatal(err)
}
if st1.Ino != st2.Ino {
t.Errorf("unstable inode number: changed from %d to %d", st1.Ino, st2.Ino)
}
// Check that we we don't have stat caching. New length should show up
// on the hard link immediately.
if err := ioutil.WriteFile(foo1, []byte("xxxxxx"), 0755); err != nil {
t.Fatal(err)
}
if err := syscall.Stat(foo2, &st2); err != nil {
t.Fatal(err)
}
if st2.Size != 6 {
t.Fatal(st2.Size)
}
}
// Test that the filesystem is immediately ready for Creat() after mount returns
func TestMountCreat(t *testing.T) {
const concurrency = 2
const repeat = 2
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
for j := 0; j < repeat; j++ {
test_helpers.MountOrFatal(t, dir, mnt, "-extpass=echo test")
var wg sync.WaitGroup
wg.Add(concurrency)
for i := 0; i < concurrency; i++ {
go func(i int) {
path := fmt.Sprintf("%s/%d", mnt, i)
fd, err := syscall.Open(path, syscall.O_CREAT|syscall.O_WRONLY|syscall.O_TRUNC, 0600)
syscall.Close(fd)
if err != nil {
t.Errorf("Creat %q: %v", path, err)
}
wg.Done()
}(i)
}
wg.Wait()
test_helpers.UnmountPanic(mnt)
}
}