whisper: add tests for mailserver (#3631)

2 files changed, 211 insertions, 8 deletions

diff --git a/whisper/mailserver/mailserver.go b/whisper/mailserver/mailserver.go
index f7d6c3e5c..3e08a3b7e 100644
--- a/whisper/mailserver/mailserver.go
+++ b/whisper/mailserver/mailserver.go
@@ -22,6 +22,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -101,11 +102,19 @@ func (s *WMailServer) Archive(env *whisper.Envelope) {
 }
 
 func (s *WMailServer) DeliverMail(peer *whisper.Peer, request *whisper.Envelope) {
-	ok, lower, upper, topic := s.validate(peer, request)
-	if !ok {
+	if peer == nil {
+		glog.V(logger.Error).Info("Whisper peer is nil")
 		return
 	}
 
+	ok, lower, upper, topic := s.validateRequest(peer.ID(), request)
+	if ok {
+		s.processRequest(peer, lower, upper, topic)
+	}
+}
+
+func (s *WMailServer) processRequest(peer *whisper.Peer, lower, upper uint32, topic whisper.TopicType) []*whisper.Envelope {
+	ret := make([]*whisper.Envelope, 0)
 	var err error
 	var zero common.Hash
 	var empty whisper.TopicType
@@ -122,10 +131,15 @@ func (s *WMailServer) DeliverMail(peer *whisper.Peer, request *whisper.Envelope)
 		}
 
 		if topic == empty || envelope.Topic == topic {
-			err = s.w.SendP2PDirect(peer, &envelope)
-			if err != nil {
-				glog.V(logger.Error).Infof("Failed to send direct message to peer: %s", err)
-				return
+			if peer == nil {
+				// used for test purposes
+				ret = append(ret, &envelope)
+			} else {
+				err = s.w.SendP2PDirect(peer, &envelope)
+				if err != nil {
+					glog.V(logger.Error).Infof("Failed to send direct message to peer: %s", err)
+					return nil
+				}
 			}
 		}
 	}
@@ -134,9 +148,11 @@ func (s *WMailServer) DeliverMail(peer *whisper.Peer, request *whisper.Envelope)
 	if err != nil {
 		glog.V(logger.Error).Infof("Level DB iterator error: %s", err)
 	}
+
+	return ret
 }
 
-func (s *WMailServer) validate(peer *whisper.Peer, request *whisper.Envelope) (bool, uint32, uint32, whisper.TopicType) {
+func (s *WMailServer) validateRequest(peerID []byte, request *whisper.Envelope) (bool, uint32, uint32, whisper.TopicType) {
 	var topic whisper.TopicType
 	if s.pow > 0.0 && request.PoW() < s.pow {
 		return false, 0, 0, topic
@@ -154,7 +170,11 @@ func (s *WMailServer) validate(peer *whisper.Peer, request *whisper.Envelope) (b
 		return false, 0, 0, topic
 	}
 
-	if bytes.Equal(peer.ID(), decrypted.Signature) {
+	src := crypto.FromECDSAPub(decrypted.Src)
+	if len(src)-len(peerID) == 1 {
+		src = src[1:]
+	}
+	if !bytes.Equal(peerID, src) {
 		glog.V(logger.Warn).Infof("Wrong signature of p2p request")
 		return false, 0, 0, topic
 	}
diff --git a/whisper/mailserver/server_test.go b/whisper/mailserver/server_test.go
new file mode 100644
index 000000000..24abf6c1a
--- /dev/null
+++ b/whisper/mailserver/server_test.go
@@ -0,0 +1,183 @@
+// Copyright 2016 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package mailserver
+
+import (
+	"crypto/ecdsa"
+	"encoding/binary"
+	"io/ioutil"
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
+	whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
+)
+
+const powRequirement = 0.00001
+const keyName = "6d604bac5401ce9a6b995f1b45a4ab"
+
+var shh *whisper.Whisper
+var seed = time.Now().Unix()
+
+type ServerTestParams struct {
+	topic whisper.TopicType
+	low   uint32
+	upp   uint32
+	key   *ecdsa.PrivateKey
+}
+
+func assert(statement bool, text string, t *testing.T) {
+	if !statement {
+		t.Fatal(text)
+	}
+}
+
+func TestDBKey(t *testing.T) {
+	var h common.Hash
+	i := uint32(time.Now().Unix())
+	k := NewDbKey(i, h)
+	assert(len(k.raw) == common.HashLength+4, "wrong DB key length", t)
+	assert(byte(i%0x100) == k.raw[3], "raw representation should be big endian", t)
+	assert(byte(i/0x1000000) == k.raw[0], "big endian expected", t)
+}
+
+func generateEnvelope(t *testing.T) *whisper.Envelope {
+	params := &whisper.MessageParams{
+		KeySym:   []byte("test key"),
+		Topic:    whisper.TopicType{},
+		Payload:  []byte("test payload"),
+		PoW:      powRequirement,
+		WorkTime: 2,
+	}
+
+	msg := whisper.NewSentMessage(params)
+	env, err := msg.Wrap(params)
+	if err != nil {
+		t.Fatalf("failed to wrap with seed %d: %s.", seed, err)
+	}
+	return env
+}
+
+func TestMailServer(t *testing.T) {
+	const password = "password_for_this_test"
+	const dbPath = "whisper-server-test"
+
+	_, err := ioutil.TempDir("", dbPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var server WMailServer
+	shh = whisper.NewWhisper(&server)
+	server.Init(shh, dbPath, password, powRequirement)
+	defer server.Close()
+
+	err = shh.AddSymKey(keyName, []byte(password))
+	if err != nil {
+		t.Fatalf("Failed to create symmetric key for mail request: %s", err)
+	}
+
+	rand.Seed(seed)
+	env := generateEnvelope(t)
+	server.Archive(env)
+	deliverTest(t, &server, env)
+}
+
+func deliverTest(t *testing.T, server *WMailServer, env *whisper.Envelope) {
+	testPeerID := shh.NewIdentity()
+	birth := env.Expiry - env.TTL
+	p := &ServerTestParams{
+		topic: env.Topic,
+		low:   birth - 1,
+		upp:   birth + 1,
+		key:   testPeerID,
+	}
+	singleRequest(t, server, env, p, true)
+
+	p.low, p.upp = birth+1, 0xffffffff
+	singleRequest(t, server, env, p, false)
+
+	p.low, p.upp = 0, birth-1
+	singleRequest(t, server, env, p, false)
+
+	p.low = birth - 1
+	p.upp = birth + 1
+	p.topic[0]++
+	singleRequest(t, server, env, p, false)
+}
+
+func singleRequest(t *testing.T, server *WMailServer, env *whisper.Envelope, p *ServerTestParams, expect bool) {
+	request := createRequest(t, p)
+	src := crypto.FromECDSAPub(&p.key.PublicKey)
+	ok, lower, upper, topic := server.validateRequest(src, request)
+	if !ok {
+		t.Fatalf("request validation failed, seed: %d.", seed)
+	}
+	if lower != p.low {
+		t.Fatalf("request validation failed (lower bound), seed: %d.", seed)
+	}
+	if upper != p.upp {
+		t.Fatalf("request validation failed (upper bound), seed: %d.", seed)
+	}
+	if topic != p.topic {
+		t.Fatalf("request validation failed (topic), seed: %d.", seed)
+	}
+
+	var exist bool
+	mail := server.processRequest(nil, p.low, p.upp, p.topic)
+	for _, msg := range mail {
+		if msg.Hash() == env.Hash() {
+			exist = true
+			break
+		}
+	}
+
+	if exist != expect {
+		t.Fatalf("error: exist = %v, seed: %d.", exist, seed)
+	}
+
+	src[0]++
+	ok, lower, upper, topic = server.validateRequest(src, request)
+	if ok {
+		t.Fatalf("request validation false positive, seed: %d.", seed)
+	}
+}
+
+func createRequest(t *testing.T, p *ServerTestParams) *whisper.Envelope {
+	data := make([]byte, 8+whisper.TopicLength)
+	binary.BigEndian.PutUint32(data, p.low)
+	binary.BigEndian.PutUint32(data[4:], p.upp)
+	copy(data[8:], p.topic[:])
+
+	params := &whisper.MessageParams{
+		KeySym:   shh.GetSymKey(keyName),
+		Topic:    p.topic,
+		Payload:  data,
+		PoW:      powRequirement * 2,
+		WorkTime: 2,
+		Src:      p.key,
+	}
+
+	msg := whisper.NewSentMessage(params)
+	env, err := msg.Wrap(params)
+	if err != nil {
+		t.Fatalf("failed to wrap with seed %d: %s.", seed, err)
+	}
+	return env
+}