From 8f94083a2114c3aef4bc0320065e0374c420ea4a Mon Sep 17 00:00:00 2001
From: Jose M Perez
Date: Thu, 12 Aug 2021 22:48:34 +0200
Subject: Flag -zerodiriv to create all diriv as all zero byte files

---
 tests/test_helpers/helpers.go     |  2 +-
 tests/zerodiriv/zerodiriv_test.go | 85 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 tests/zerodiriv/zerodiriv_test.go

(limited to 'tests')

diff --git a/tests/test_helpers/helpers.go b/tests/test_helpers/helpers.go
index 87dba0a..f78c59c 100644
--- a/tests/test_helpers/helpers.go
+++ b/tests/test_helpers/helpers.go
@@ -110,7 +110,7 @@ func ResetTmpDir(createDirIV bool) {
 		// Open cipherdir (following symlinks)
 		dirfd, err := syscall.Open(DefaultCipherDir, syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
 		if err == nil {
-			err = nametransform.WriteDirIVAt(dirfd)
+			err = nametransform.WriteDirIVAt(dirfd, true)
 			syscall.Close(dirfd)
 		}
 		if err != nil {
diff --git a/tests/zerodiriv/zerodiriv_test.go b/tests/zerodiriv/zerodiriv_test.go
new file mode 100644
index 0000000..3fbbf47
--- /dev/null
+++ b/tests/zerodiriv/zerodiriv_test.go
@@ -0,0 +1,85 @@
+package zerodiriv
+
+// integration tests that target zerodiriv specifically
+
+import (
+	"bytes"
+	"path/filepath"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
+)
+
+var cDir string
+var pDir string
+
+var testPw = []byte("test")
+
+// Create and mount "-zerodiriv" fs
+func TestMain(m *testing.M) {
+	cDir = test_helpers.InitFS(nil, "-zerodiriv")
+	pDir = cDir + ".mnt"
+	test_helpers.MountOrExit(cDir, pDir, "-zerodiriv", "-extpass", "echo test")
+	r := m.Run()
+	test_helpers.UnmountPanic(pDir)
+	os.Exit(r)
+}
+
+// diriv should be all-zero on newly created dirs
+func TestZeroDirIV(t *testing.T) {
+	// Create /dir1, move it and create it again
+	var dirPath = pDir+"/dir1"
+	var err = os.Mkdir(dirPath, 0777)
+	if err != nil {
+		t.Error(err)
+	}
+	err = os.Rename(dirPath, dirPath + ".bak")
+	if err != nil {
+		t.Error(err)
+	}
+	err = os.Mkdir(dirPath, 0777)
+	if err != nil {
+		t.Error(err)
+	}
+
+	var matches []string
+	matches, err = filepath.Glob(cDir+"/*/gocryptfs.diriv")
+	if err != nil {
+		t.Error(err)
+	}
+
+	// The contents of the both diriv files must be the same
+	var diriv0 []byte
+	diriv0, err = ioutil.ReadFile(matches[0])
+	if err != nil {
+		t.Error(err)
+	}
+	var diriv1 []byte
+	diriv1, err = ioutil.ReadFile(matches[1])
+	if err != nil {
+		t.Error(err)
+	}
+	if !bytes.Equal(diriv0, diriv1) {
+		t.Errorf("both dirivs should have the same value")
+	}
+	// And equal to zero
+	zerodiriv := make([]byte, len(diriv0))
+	if !bytes.Equal(diriv0, zerodiriv) {
+		t.Errorf("both dirivs should be all-zero")
+	}
+}
+
+// root diriv should be all-zero
+func TestZeroRootDirIV(t *testing.T) {
+	// The contents of the diriv file must be zero
+	diriv, err := ioutil.ReadFile(cDir+"/gocryptfs.diriv")
+	if err != nil {
+		t.Error(err)
+	}
+	zerodiriv := make([]byte, len(diriv))
+	if !bytes.Equal(diriv, zerodiriv) {
+		t.Errorf("root diriv should be all-zero")
+	}
+}
-- 
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