libgocryptfs/tests/cli/cli_test.go

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package cli
// Test CLI operations like "-init", "-password" etc
import (
"fmt"
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"io/ioutil"
"os"
"os/exec"
"strconv"
"strings"
"sync"
"syscall"
"testing"
"time"
Major refactoring: Split up "cryptfs" into several internal packages "git status" for reference: deleted: cryptfs/cryptfs.go deleted: cryptfs/names_core.go modified: integration_tests/cli_test.go modified: integration_tests/helpers.go renamed: cryptfs/config_file.go -> internal/configfile/config_file.go renamed: cryptfs/config_test.go -> internal/configfile/config_test.go renamed: cryptfs/config_test/.gitignore -> internal/configfile/config_test/.gitignore renamed: cryptfs/config_test/PlaintextNames.conf -> internal/configfile/config_test/PlaintextNames.conf renamed: cryptfs/config_test/StrangeFeature.conf -> internal/configfile/config_test/StrangeFeature.conf renamed: cryptfs/config_test/v1.conf -> internal/configfile/config_test/v1.conf renamed: cryptfs/config_test/v2.conf -> internal/configfile/config_test/v2.conf renamed: cryptfs/kdf.go -> internal/configfile/kdf.go renamed: cryptfs/kdf_test.go -> internal/configfile/kdf_test.go renamed: cryptfs/cryptfs_content.go -> internal/contentenc/content.go new file: internal/contentenc/content_api.go renamed: cryptfs/content_test.go -> internal/contentenc/content_test.go renamed: cryptfs/file_header.go -> internal/contentenc/file_header.go renamed: cryptfs/intrablock.go -> internal/contentenc/intrablock.go renamed: cryptfs/address_translation.go -> internal/contentenc/offsets.go new file: internal/cryptocore/crypto_api.go renamed: cryptfs/gcm_go1.4.go -> internal/cryptocore/gcm_go1.4.go renamed: cryptfs/gcm_go1.5.go -> internal/cryptocore/gcm_go1.5.go renamed: cryptfs/nonce.go -> internal/cryptocore/nonce.go renamed: cryptfs/openssl_aead.go -> internal/cryptocore/openssl_aead.go renamed: cryptfs/openssl_benchmark.bash -> internal/cryptocore/openssl_benchmark.bash renamed: cryptfs/openssl_test.go -> internal/cryptocore/openssl_test.go new file: internal/nametransform/name_api.go new file: internal/nametransform/names_core.go renamed: cryptfs/names_diriv.go -> internal/nametransform/names_diriv.go renamed: cryptfs/names_noiv.go -> internal/nametransform/names_noiv.go renamed: cryptfs/names_test.go -> internal/nametransform/names_test.go new file: internal/nametransform/pad16.go renamed: cryptfs/log.go -> internal/toggledlog/log.go renamed: cryptfs/log_go1.4.go -> internal/toggledlog/log_go1.4.go renamed: cryptfs/log_go1.5.go -> internal/toggledlog/log_go1.5.go modified: main.go modified: masterkey.go modified: pathfs_frontend/file.go modified: pathfs_frontend/file_holes.go modified: pathfs_frontend/fs.go modified: pathfs_frontend/fs_dir.go modified: pathfs_frontend/names.go modified: test.bash
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"github.com/rfjakob/gocryptfs/internal/configfile"
"github.com/rfjakob/gocryptfs/internal/exitcodes"
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
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"github.com/rfjakob/gocryptfs/internal/nametransform"
"github.com/rfjakob/gocryptfs/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)
}
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// Test -init flag
func TestInit(t *testing.T) {
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dir := test_helpers.InitFS(t)
_, c, err := configfile.LoadAndDecrypt(dir+"/"+configfile.ConfDefaultName, testPw)
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if err != nil {
t.Fatal(err)
}
if c.IsFeatureFlagSet(configfile.FlagAESSIV) {
t.Error("AESSIV flag should not be set")
}
}
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// 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
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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())
}
}
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// Test -init & -config flag
func TestInitConfig(t *testing.T) {
config := test_helpers.TmpDir + "/TestInitConfig.conf"
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dir := test_helpers.InitFS(t, "-config="+config)
_, err := os.Stat(config)
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if err != nil {
t.Fatal(err)
}
// Test -passwd & -config
cmd2 := exec.Command(test_helpers.GocryptfsBinary, "-q", "-passwd", "-extpass", "echo test",
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"-config", config, dir)
cmd2.Stdout = os.Stdout
cmd2.Stderr = os.Stderr
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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")
}
}
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// 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)
}
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// -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
func TestMountPasswordIncorrect(t *testing.T) {
cDir := test_helpers.InitFS(t) // Create filesystem with password "test"
pDir := cDir + ".mnt"
err := test_helpers.Mount(cDir, pDir, false, "-extpass", "echo WRONG", "-wpanic=false")
exitCode := test_helpers.ExtractCmdExitCode(err)
if exitCode != exitcodes.PasswordIncorrect {
t.Errorf("want=%d, got=%d", exitcodes.PasswordIncorrect, exitCode)
}
}
// 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
func TestBadname(t *testing.T) {
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
//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
dir := test_helpers.InitFS(t)
mnt := dir + ".mnt"
validFileName := "file"
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
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
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
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// Case 1: write one valid filename (empty content)
err := ioutil.WriteFile(file, []byte("Content Case 1."), 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
}
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
//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)
}
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
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//re-write content for case 1
err = ioutil.WriteFile(file, []byte("Content Case 1."), 0600)
if err != nil {
t.Fatal(err)
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
// Case 2: File with invalid suffix in plain name but valid cipher file
file = mnt + "/" + validFileName + nametransform.BadnameSuffix
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
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 (cropping the encrpyted file name)
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)
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
searchstrings := []string{
validFileName,
validFileName + nametransform.BadnameSuffix,
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
"",
validFileName + invalidSuffix + nametransform.BadnameSuffix,
encryptedfilename[:len(encryptedfilename)-2] + invalidSuffix + nametransform.BadnameSuffix,
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
"",
validFileName + "wrongPattern" + nametransform.BadnameSuffix}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
results := []bool{false, false, true, false, false, true, true}
var filecontent string
var filebytes []byte
for _, name := range names {
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
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
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
} 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
}
Badname file content access This proposal is the counterpart of the modifications from the `-badname` parameter. It modifies the plain -> cipher mapping for filenames when using `-badname` parameter. The new function `EncryptAndHashBadName` tries to find a cipher filename for the given plain name with the following steps: 1. If `badname` is disabled or direct mapping is successful: Map directly (default and current behaviour) 2. If a file with badname flag has a valid cipher file, this is returned (=File just ends with the badname flag) 3. If a file with a badname flag exists where only the badname flag was added, this is returned (=File cipher name could not be decrypted by function `DecryptName` and just the badname flag was added) 4. Search for all files which cipher file name extists when cropping more and more characters from the end. If only 1 file is found, return this 5. Return an error otherwise This allows file access in the file browsers but most important it allows that you rename files with undecryptable cipher names in the plain directories. Renaming those files will then generate a proper cipher filename One backdraft: When mounting the cipher dir with -badname parameter, you can never create (or rename to) files whose file name ends with the badname file flag (at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error. I modified the CLI test function to cover additional test cases. Test [Case 7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712) cannot be performed since the cli tests are executed in panic mode. The testing is stopped on error. Since the function`DecryptName` produces internal errors when hitting non-decryptable file names, this test was omitted. This implementation is a proposal where I tried to change the minimum amount of existing code. Another possibility would be instead of creating the new function `EncryptAndHashBadName` to modify the signature of the existing function `EncryptAndHashName(name string, iv []byte)` to `EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the functionality into this function directly. You may allow calling with dirfd=-1 or other invalid values an then performing the current functionality.
2021-06-17 08:11:33 +02:00
for i := 0; i < len(results); i++ {
if !results[i] {
t.Errorf("Case %d failed: '%s' in [%s]", 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` hands out arbitrary inode
// numbers (no hard link tracking)
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, st3 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)
}
// Stat()'ing again should give us again a new inode number
if err := syscall.Stat(foo2, &st3); err != nil {
t.Fatal(err)
}
if st1.Ino == st2.Ino || st2.Ino == st3.Ino || st1.Ino == st3.Ino {
t.Error(st1.Ino, st2.Ino, st3.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.Creat(path, 0600)
syscall.Close(fd)
if err != nil {
t.Errorf("Creat %q: %v", path, err)
}
wg.Done()
}(i)
}
wg.Wait()
test_helpers.UnmountPanic(mnt)
}
}