fusefrontend: add xattr support

At the moment, only for reverse mode.

https://github.com/rfjakob/gocryptfs/issues/217

1 files changed, 41 insertions, 0 deletions

diff --git a/internal/fusefrontend/xattr_unit_test.go b/internal/fusefrontend/xattr_unit_test.go
new file mode 100644
index 0000000..ea5d3bb
--- /dev/null
+++ b/internal/fusefrontend/xattr_unit_test.go
@@ -0,0 +1,41 @@
+package fusefrontend
+
+// This file is named "xattr_unit_test.go" because there is also a
+// "xattr_integration_test.go" in the test/xattr package.
+
+import (
+	"syscall"
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/internal/contentenc"
+	"github.com/rfjakob/gocryptfs/internal/cryptocore"
+	"github.com/rfjakob/gocryptfs/internal/nametransform"
+)
+
+func newTestFS() *FS {
+	// Init crypto backend
+	key := make([]byte, cryptocore.KeyLen)
+	cCore := cryptocore.New(key, cryptocore.BackendGoGCM, contentenc.DefaultIVBits, true, false)
+	cEnc := contentenc.New(cCore, contentenc.DefaultBS, false)
+	nameTransform := nametransform.New(cCore.EMECipher, true, true)
+	args := Args{}
+	return NewFS(args, cEnc, nameTransform)
+}
+
+func TestEncryptDecryptXattrName(t *testing.T) {
+	fs := newTestFS()
+	_, err := fs.encryptXattrName("xxxx")
+	if err != syscall.EPERM {
+		t.Fatalf("Names that don't start with 'user.' should fail")
+	}
+	attr1 := "user.foo123456789"
+	cAttr, err := fs.encryptXattrName(attr1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("cAttr=%v", cAttr)
+	attr2, err := fs.decryptXattrName(cAttr)
+	if attr1 != attr2 {
+		t.Fatalf("Decrypt mismatch: %v != %v", attr1, attr2)
+	}
+}