From 339c63f0c8cd4374f6fa26484498eb6fa91b7bca Mon Sep 17 00:00:00 2001
From: Yawning Angel <yawning@torproject.org>
Date: Sun, 17 Aug 2014 17:11:03 +0000
Subject: Massive cleanup/code reorg.

 * Changed obfs4proxy to be more like obfsproxy in terms of design,
   including being an easy framework for developing new TCP/IP style
   pluggable transports.
 * Added support for also acting as an obfs2/obfs3 client or bridge
   as a transition measure (and because the code itself is trivial).
 * Massively cleaned up the obfs4 and related code to be easier to
   read, and more idiomatic Go-like in style.
 * To ease deployment, obfs4proxy will now autogenerate the node-id,
   curve25519 keypair, and drbg seed if none are specified, and save
   them to a JSON file in the pt_state directory (Fixes Tor bug #12605).
---
 common/replayfilter/replay_filter_test.go | 95 +++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 common/replayfilter/replay_filter_test.go

(limited to 'common/replayfilter/replay_filter_test.go')

diff --git a/common/replayfilter/replay_filter_test.go b/common/replayfilter/replay_filter_test.go
new file mode 100644
index 0000000..884e4fb
--- /dev/null
+++ b/common/replayfilter/replay_filter_test.go
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2014, Yawning Angel <yawning at torproject dot org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package replayfilter
+
+import (
+	"testing"
+	"time"
+)
+
+func TestReplayFilter(t *testing.T) {
+	ttl := 10 * time.Second
+
+	f, err := New(ttl)
+	if err != nil {
+		t.Fatal("newReplayFilter failed:", err)
+	}
+
+	buf := []byte("This is a test of the Emergency Broadcast System.")
+	now := time.Now()
+
+	// testAndSet into empty filter, returns false (not present).
+	set := f.TestAndSet(now, buf)
+	if set {
+		t.Fatal("TestAndSet empty filter returned true")
+	}
+
+	// testAndSet into filter containing entry, should return true(present).
+	set = f.TestAndSet(now, buf)
+	if !set {
+		t.Fatal("testAndSet populated filter (replayed) returned false")
+	}
+
+	buf2 := []byte("This concludes this test of the Emergency Broadcast System.")
+	now = now.Add(ttl)
+
+	// testAndSet with time advanced.
+	set = f.TestAndSet(now, buf2)
+	if set {
+		t.Fatal("testAndSet populated filter, 2nd entry returned true")
+	}
+	set = f.TestAndSet(now, buf2)
+	if !set {
+		t.Fatal("testAndSet populated filter, 2nd entry (replayed) returned false")
+	}
+
+	// Ensure that the first entry has been removed by compact.
+	set = f.TestAndSet(now, buf)
+	if set {
+		t.Fatal("testAndSet populated filter, compact check returned true")
+	}
+
+	// Ensure that the filter gets reaped if the clock jumps backwards.
+	now = time.Time{}
+	set = f.TestAndSet(now, buf)
+	if set {
+		t.Fatal("testAndSet populated filter, backward time jump returned true")
+	}
+	if len(f.filter) != 1 {
+		t.Fatal("filter map has a unexpected number of entries:", len(f.filter))
+	}
+	if f.fifo.Len() != 1 {
+		t.Fatal("filter fifo has a unexpected number of entries:", f.fifo.Len())
+	}
+
+	// Ensure that the entry is properly added after reaping.
+	set = f.TestAndSet(now, buf)
+	if !set {
+		t.Fatal("testAndSet populated filter, post-backward clock jump (replayed) returned false")
+	}
+}
-- 
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