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/*
* 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 ntor
import (
"bytes"
"testing"
)
// TestNewKeypair tests Curve25519/Elligator keypair generation.
func TestNewKeypair(t *testing.T) {
// Test standard Curve25519 first.
keypair, err := NewKeypair(false)
if err != nil {
t.Fatal("NewKeypair(false) failed:", err)
}
if keypair == nil {
t.Fatal("NewKeypair(false) returned nil")
}
if keypair.HasElligator() {
t.Fatal("NewKeypair(false) has a Elligator representative")
}
// Test Elligator generation.
keypair, err = NewKeypair(true)
if err != nil {
t.Fatal("NewKeypair(true) failed:", err)
}
if keypair == nil {
t.Fatal("NewKeypair(true) returned nil")
}
if !keypair.HasElligator() {
t.Fatal("NewKeypair(true) mising an Elligator representative")
}
}
// Test Client/Server handshake.
func TestHandshake(t *testing.T) {
clientKeypair, err := NewKeypair(true)
if err != nil {
t.Fatal("Failed to generate client keypair:", err)
}
if clientKeypair == nil {
t.Fatal("Client keypair is nil")
}
serverKeypair, err := NewKeypair(true)
if err != nil {
t.Fatal("Failed to generate server keypair:", err)
}
if serverKeypair == nil {
t.Fatal("Server keypair is nil")
}
idKeypair, err := NewKeypair(false)
if err != nil {
t.Fatal("Failed to generate identity keypair:", err)
}
if idKeypair == nil {
t.Fatal("Identity keypair is nil")
}
nodeID, err := NewNodeID([]byte("\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13"))
if err != nil {
t.Fatal("Failed to load NodeId:", err)
}
// ServerHandshake
clientPublic := clientKeypair.Representative().ToPublic()
ok, serverSeed, serverAuth := ServerHandshake(clientPublic,
serverKeypair, idKeypair, nodeID)
if !ok {
t.Fatal("ServerHandshake failed")
}
if serverSeed == nil {
t.Fatal("ServerHandshake returned nil KEY_SEED")
}
if serverAuth == nil {
t.Fatal("ServerHandshake returned nil AUTH")
}
// ClientHandshake
ok, clientSeed, clientAuth := ClientHandshake(clientKeypair,
serverKeypair.Public(), idKeypair.Public(), nodeID)
if !ok {
t.Fatal("ClientHandshake failed")
}
if clientSeed == nil {
t.Fatal("ClientHandshake returned nil KEY_SEED")
}
if clientAuth == nil {
t.Fatal("ClientHandshake returned nil AUTH")
}
// WARNING: Use a constant time comparison in actual code.
if 0 != bytes.Compare(clientSeed.Bytes()[:], serverSeed.Bytes()[:]) {
t.Fatal("KEY_SEED mismatched between client/server")
}
if 0 != bytes.Compare(clientAuth.Bytes()[:], serverAuth.Bytes()[:]) {
t.Fatal("AUTH mismatched between client/server")
}
}
// Benchmark Client/Server handshake. The actual time taken that will be
// observed on either the Client or Server is half the reported time per
// operation since the benchmark does both sides.
func BenchmarkHandshake(b *testing.B) {
// Generate the "long lasting" identity key and NodeId.
idKeypair, err := NewKeypair(false)
if err != nil || idKeypair == nil {
b.Fatal("Failed to generate identity keypair")
}
nodeID, err := NewNodeID([]byte("\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13"))
if err != nil {
b.Fatal("Failed to load NodeId:", err)
}
b.ResetTimer()
// Start the actual benchmark.
for i := 0; i < b.N; i++ {
// Generate the keypairs.
serverKeypair, err := NewKeypair(true)
if err != nil || serverKeypair == nil {
b.Fatal("Failed to generate server keypair")
}
clientKeypair, err := NewKeypair(true)
if err != nil || clientKeypair == nil {
b.Fatal("Failed to generate client keypair")
}
// Server handshake.
clientPublic := clientKeypair.Representative().ToPublic()
ok, serverSeed, serverAuth := ServerHandshake(clientPublic,
serverKeypair, idKeypair, nodeID)
if !ok || serverSeed == nil || serverAuth == nil {
b.Fatal("ServerHandshake failed")
}
// Client handshake.
serverPublic := serverKeypair.Representative().ToPublic()
ok, clientSeed, clientAuth := ClientHandshake(clientKeypair,
serverPublic, idKeypair.Public(), nodeID)
if !ok || clientSeed == nil || clientAuth == nil {
b.Fatal("ClientHandshake failed")
}
// Validate the authenticator. Real code would pass the AUTH read off
// the network as a slice to CompareAuth here.
if !CompareAuth(clientAuth, serverAuth.Bytes()[:]) ||
!CompareAuth(serverAuth, clientAuth.Bytes()[:]) {
b.Fatal("AUTH mismatched between client/server")
}
}
}
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