libgocryptfs/tests/test_helpers/helpers.go

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package test_helpers
import (
"crypto/md5"
"encoding/hex"
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"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
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"syscall"
"testing"
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/nametransform"
)
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// TmpDir will be created inside this directory
const testParentDir = "/tmp/gocryptfs-test-parent"
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// GocryptfsBinary is the assumed path to the gocryptfs build.
const GocryptfsBinary = "../../gocryptfs"
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// TmpDir is a unique temporary directory. "go test" runs package tests in parallel. We create a
// unique TmpDir in init() so the tests do not interfere.
var TmpDir string
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// DefaultPlainDir is TmpDir + "/default-plain"
var DefaultPlainDir string
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// DefaultCipherDir is TmpDir + "/default-cipher"
var DefaultCipherDir string
func init() {
os.MkdirAll(testParentDir, 0700)
var err error
TmpDir, err = ioutil.TempDir(testParentDir, "")
if err != nil {
panic(err)
}
DefaultPlainDir = TmpDir + "/default-plain"
DefaultCipherDir = TmpDir + "/default-cipher"
}
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// ResetTmpDir deletes TmpDir, create new dir tree:
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//
// TmpDir
// |-- DefaultPlainDir
// *-- DefaultCipherDir
// *-- gocryptfs.diriv
func ResetTmpDir(createDirIV bool) {
// Try to unmount and delete everything
entries, err := ioutil.ReadDir(TmpDir)
if err == nil {
for _, e := range entries {
d := filepath.Join(TmpDir, e.Name())
err = os.Remove(d)
if err != nil {
pe := err.(*os.PathError)
if pe.Err == syscall.EBUSY {
if testing.Verbose() {
fmt.Printf("Remove failed: %v. Maybe still mounted?\n", pe)
}
err = UnmountErr(d)
if err != nil {
panic(err)
}
} else if pe.Err != syscall.ENOTEMPTY {
panic("Unhandled error: " + pe.Err.Error())
}
err = os.RemoveAll(d)
if err != nil {
panic(err)
}
}
}
}
err = os.Mkdir(DefaultPlainDir, 0700)
if err != nil {
panic(err)
}
err = os.Mkdir(DefaultCipherDir, 0700)
if err != nil {
panic(err)
}
if createDirIV {
err = nametransform.WriteDirIV(DefaultCipherDir)
if err != nil {
panic(err)
}
}
}
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// InitFS calls "gocryptfs -init" on a new directory in TmpDir, passing
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// "extraArgs" in addition to useful defaults.
//
// The returned cipherdir has NO trailing slash.
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func InitFS(t *testing.T, extraArgs ...string) string {
dir, err := ioutil.TempDir(TmpDir, "")
if err != nil {
t.Fatal(err)
}
args := []string{"-q", "-init", "-extpass", "echo test", "-scryptn=10"}
args = append(args, extraArgs...)
args = append(args, dir)
cmd := exec.Command(GocryptfsBinary, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err = cmd.Run()
if err != nil {
t.Fatalf("InitFS with args %v failed: %v", args, err)
}
return dir
}
// Mount CIPHERDIR "c" on PLAINDIR "p"
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// Creates "p" if it does not exist.
func Mount(c string, p string, showOutput bool, extraArgs ...string) error {
var args []string
args = append(args, extraArgs...)
args = append(args, "-q", "-wpanic", "-nosyslog")
//args = append(args, "-fusedebug")
//args = append(args, "-d")
args = append(args, c)
args = append(args, p)
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if _, err := os.Stat(p); err != nil {
err = os.Mkdir(p, 0777)
if err != nil {
return err
}
}
cmd := exec.Command(GocryptfsBinary, args...)
if showOutput {
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
}
return cmd.Run()
}
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// MountOrExit calls Mount() and exits on failure.
func MountOrExit(c string, p string, extraArgs ...string) {
err := Mount(c, p, true, extraArgs...)
if err != nil {
fmt.Printf("mount failed: %v", err)
os.Exit(1)
}
}
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// MountOrFatal calls Mount() and calls t.Fatal() on failure.
func MountOrFatal(t *testing.T, c string, p string, extraArgs ...string) {
err := Mount(c, p, true, extraArgs...)
if err != nil {
t.Fatal(fmt.Errorf("mount failed: %v", err))
}
}
// UnmountPanic tries to umount "dir" and panics on error.
func UnmountPanic(dir string) {
err := UnmountErr(dir)
if err != nil {
fmt.Println(err)
panic(err)
}
}
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// UnmountErr tries to unmount "dir" and returns the resulting error.
func UnmountErr(dir string) error {
var cmd *exec.Cmd
if runtime.GOOS == "darwin" {
cmd = exec.Command("umount", dir)
} else {
cmd = exec.Command("fusermount", "-u", "-z", dir)
}
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
}
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// Md5fn returns an md5 string for file "filename"
func Md5fn(filename string) string {
buf, err := ioutil.ReadFile(filename)
if err != nil {
fmt.Printf("ReadFile: %v\n", err)
return ""
}
return Md5hex(buf)
}
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// Md5hex returns an md5 string for "buf"
func Md5hex(buf []byte) string {
rawHash := md5.Sum(buf)
hash := hex.EncodeToString(rawHash[:])
return hash
}
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// VerifySize checks that the file size equals "want". This checks:
// 1) Size reported by Stat()
// 2) Number of bytes returned when reading the whole file
func VerifySize(t *testing.T, path string, want int) {
buf, err := ioutil.ReadFile(path)
if err != nil {
t.Errorf("ReadFile failed: %v", err)
} else if len(buf) != want {
t.Errorf("wrong read size: got=%d want=%d", len(buf), want)
}
fi, err := os.Stat(path)
if err != nil {
t.Errorf("Stat failed: %v", err)
} else if fi.Size() != int64(want) {
t.Errorf("wrong stat file size, got=%d want=%d", fi.Size(), want)
}
}
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// TestMkdirRmdir creates and deletes a directory
func TestMkdirRmdir(t *testing.T, plainDir string) {
dir := plainDir + "/dir1"
err := os.Mkdir(dir, 0777)
if err != nil {
t.Fatal(err)
}
err = syscall.Rmdir(dir)
if err != nil {
t.Fatal(err)
}
// Removing a non-empty dir should fail with ENOTEMPTY
if os.Mkdir(dir, 0777) != nil {
t.Fatal(err)
}
f, err := os.Create(dir + "/file")
if err != nil {
t.Fatal(err)
}
f.Close()
err = syscall.Rmdir(dir)
errno := err.(syscall.Errno)
if errno != syscall.ENOTEMPTY {
t.Errorf("Should have gotten ENOTEMPTY, go %v", errno)
}
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if syscall.Unlink(dir+"/file") != nil {
t.Fatal(err)
}
if syscall.Rmdir(dir) != nil {
t.Fatal(err)
}
// We should also be able to remove a directory we do not have permissions to
// read or write
err = os.Mkdir(dir, 0000)
if err != nil {
t.Fatal(err)
}
err = syscall.Rmdir(dir)
if err != nil {
// Make sure the directory can cleaned up by the next test run
os.Chmod(dir, 0700)
t.Fatal(err)
}
}
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// TestRename creates and renames a file
func TestRename(t *testing.T, plainDir string) {
file1 := plainDir + "/rename1"
file2 := plainDir + "/rename2"
err := ioutil.WriteFile(file1, []byte("content"), 0777)
if err != nil {
t.Fatal(err)
}
err = syscall.Rename(file1, file2)
if err != nil {
t.Fatal(err)
}
syscall.Unlink(file2)
}
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// VerifyExistence checks in 3 ways that "path" exists:
// stat, open, readdir
func VerifyExistence(path string) bool {
// Check that file can be stated
_, err := os.Stat(path)
if err != nil {
//t.Log(err)
return false
}
// Check that file can be opened
fd, err := os.Open(path)
if err != nil {
//t.Log(err)
return false
}
fd.Close()
// Check that file shows up in directory listing
dir := filepath.Dir(path)
name := filepath.Base(path)
fi, err := ioutil.ReadDir(dir)
if err != nil {
//t.Log(err)
return false
}
for _, i := range fi {
if i.Name() == name {
return true
}
}
return false
}
// Du returns the disk usage of the file "fd" points to, in bytes.
// Same as "du --block-size=1".
func Du(t *testing.T, fd int) (nBytes int64) {
var st syscall.Stat_t
err := syscall.Fstat(fd, &st)
if err != nil {
t.Fatal(err)
}
// st.Blocks = number of 512-byte blocks
return st.Blocks * 512
}