From b65882985dd7aa3ea7ae76c49d592ff30b353a8b Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Mon, 7 Sep 2015 21:25:05 +0200
Subject: [PATCH] Add tests for name encryption and byte range splitting

---
 cryptfs/content_test.go | 34 ++++++++++++++++++++++++
 cryptfs/names_test.go   | 57 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 cryptfs/content_test.go
 create mode 100644 cryptfs/names_test.go

diff --git a/cryptfs/content_test.go b/cryptfs/content_test.go
new file mode 100644
index 0000000..1900818
--- /dev/null
+++ b/cryptfs/content_test.go
@@ -0,0 +1,34 @@
+package cryptfs
+
+import (
+	"testing"
+	"fmt"
+)
+
+type testRange struct {
+	offset uint64
+	length uint64
+}
+
+func TestSplitRange(t *testing.T) {
+	var ranges []testRange
+
+	ranges = append(ranges, testRange{0, 70000},
+		testRange{0, 10},
+		testRange{234, 6511},
+		testRange{65444, 54},
+		testRange{6654, 8945})
+
+	var key [16]byte
+	f := NewCryptFS(key, true)
+
+	for _, r := range(ranges) {
+		parts := f.SplitRange(r.offset, r.length)
+		for _, p := range(parts) {
+			if p.Length > DEFAULT_PLAINBS || p.Offset >= DEFAULT_PLAINBS {
+				fmt.Printf("Test fail: n=%d, length=%d, offset=%d\n", p.BlockNo, p.Length, p.Offset)
+				t.Fail()
+			}
+		}
+	}
+}
diff --git a/cryptfs/names_test.go b/cryptfs/names_test.go
new file mode 100644
index 0000000..30ecfb9
--- /dev/null
+++ b/cryptfs/names_test.go
@@ -0,0 +1,57 @@
+package cryptfs
+
+import (
+	"testing"
+	"bytes"
+)
+
+func TestTranslatePath(t *testing.T) {
+	var s []string
+	s = append(s, "foo")
+	s = append(s, "foo12312312312312312313123123123")
+	s = append(s, "123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890")
+
+	var key [16]byte
+	fs := NewCryptFS(key, true)
+
+	for _, n := range(s) {
+		c := fs.EncryptPath(n)
+		d, err := fs.DecryptPath(c)
+		if err != nil {
+			t.Errorf("Got error from DecryptName: %s", err)
+		}
+		if d != n {
+			t.Errorf("Content mismatch, n=\"%s\" d=\"%s\"", n, d)
+		}
+		//fmt.Printf("n=%s c=%s d=%s\n", n, c, d)
+	}
+}
+
+func TestPad16(t *testing.T) {
+	var s [][]byte
+	s = append(s, []byte("foo"))
+	s = append(s, []byte("12345678901234567"))
+	s = append(s, []byte("12345678901234567abcdefg"))
+	var key [16]byte
+	fs := NewCryptFS(key, true)
+	for i := range(s) {
+		orig := s[i]
+		padded := fs.pad16(orig)
+		if len(padded) <= len(orig) {
+			t.Errorf("Padded length not bigger than orig: %d", len(padded))
+		}
+		if len(padded) % 16 != 0 {
+			t.Errorf("Length is not aligend: %d", len(padded))
+		}
+		unpadded, err := fs.unPad16(padded)
+		if err != nil {
+			t.Error("unPad16 returned error:", err)
+		}
+		if len(unpadded) != len(orig) {
+			t.Errorf("Size mismatch: orig=%d unpadded=%d", len(s[i]), len(unpadded))
+		}
+		if ! bytes.Equal(orig, unpadded) {
+			t.Error("Content mismatch orig vs unpadded")
+		}
+	}
+}