Preparing move to modules

[govpn.git] / cnw / cnw_test.go

diff --git a/cnw/cnw_test.go b/cnw/cnw_test.go
new file mode 100644 (file)
index 0000000..dd972c2
--- /dev/null
+++ b/cnw/cnw_test.go
@@ -0,0 +1,87 @@
+/*
+GoVPN -- simple secure free software virtual private network daemon
+Copyright (C) 2014-2019 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package cnw
+
+import (
+       "bytes"
+       "crypto/rand"
+       "encoding/binary"
+       "io"
+       "testing"
+       "testing/quick"
+)
+
+var (
+       testKey = new([32]byte)
+)
+
+func init() {
+       io.ReadFull(rand.Reader, testKey[:])
+}
+
+func TestSymmetric(t *testing.T) {
+       nonce := make([]byte, 8)
+       f := func(data []byte, pktNum uint64) bool {
+               if len(data) == 0 {
+                       return true
+               }
+               binary.BigEndian.PutUint64(nonce, pktNum)
+               chaffed := Chaff(testKey, nonce, data)
+               if len(chaffed) != len(data)*EnlargeFactor {
+                       return false
+               }
+               decoded, err := Winnow(testKey, nonce, chaffed)
+               if err != nil {
+                       return false
+               }
+               return bytes.Compare(decoded, data) == 0
+       }
+       if err := quick.Check(f, nil); err != nil {
+               t.Error(err)
+       }
+}
+
+func TestSmallSize(t *testing.T) {
+       _, err := Winnow(testKey, []byte("foobar12"), []byte("foobar"))
+       if err == nil {
+               t.Fail()
+       }
+}
+
+func BenchmarkChaff(b *testing.B) {
+       nonce := make([]byte, 8)
+       data := make([]byte, 16)
+       io.ReadFull(rand.Reader, nonce)
+       io.ReadFull(rand.Reader, data)
+       b.ResetTimer()
+       for i := 0; i < b.N; i++ {
+               Chaff(testKey, nonce, data)
+       }
+}
+
+func BenchmarkWinnow(b *testing.B) {
+       nonce := make([]byte, 8)
+       data := make([]byte, 16)
+       io.ReadFull(rand.Reader, nonce)
+       io.ReadFull(rand.Reader, data)
+       chaffed := Chaff(testKey, nonce, data)
+       b.ResetTimer()
+       for i := 0; i < b.N; i++ {
+               Winnow(testKey, nonce, chaffed)
+       }
+}