313 lines
10 KiB
Go
313 lines
10 KiB
Go
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package mru
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"encoding/json"
|
|
"fmt"
|
|
"reflect"
|
|
"testing"
|
|
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/swarm/storage"
|
|
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
|
|
)
|
|
|
|
func areEqualJSON(s1, s2 string) (bool, error) {
|
|
//credit for the trick: turtlemonvh https://gist.github.com/turtlemonvh/e4f7404e28387fadb8ad275a99596f67
|
|
var o1 interface{}
|
|
var o2 interface{}
|
|
|
|
err := json.Unmarshal([]byte(s1), &o1)
|
|
if err != nil {
|
|
return false, fmt.Errorf("Error mashalling string 1 :: %s", err.Error())
|
|
}
|
|
err = json.Unmarshal([]byte(s2), &o2)
|
|
if err != nil {
|
|
return false, fmt.Errorf("Error mashalling string 2 :: %s", err.Error())
|
|
}
|
|
|
|
return reflect.DeepEqual(o1, o2), nil
|
|
}
|
|
|
|
// TestEncodingDecodingUpdateRequests ensures that requests are serialized properly
|
|
// while also checking cryptographically that only the owner of a Feed can update it.
|
|
func TestEncodingDecodingUpdateRequests(t *testing.T) {
|
|
|
|
charlie := newCharlieSigner() //Charlie
|
|
bob := newBobSigner() //Bob
|
|
|
|
// Create a feed to our good guy Charlie's name
|
|
topic, _ := NewTopic("a good topic name", nil)
|
|
firstRequest := NewFirstRequest(topic)
|
|
firstRequest.User = charlie.Address()
|
|
|
|
// We now encode the create message to simulate we send it over the wire
|
|
messageRawData, err := firstRequest.MarshalJSON()
|
|
if err != nil {
|
|
t.Fatalf("Error encoding first feed update request: %s", err)
|
|
}
|
|
|
|
// ... the message arrives and is decoded...
|
|
var recoveredFirstRequest Request
|
|
if err := recoveredFirstRequest.UnmarshalJSON(messageRawData); err != nil {
|
|
t.Fatalf("Error decoding first feed update request: %s", err)
|
|
}
|
|
|
|
// ... but verification should fail because it is not signed!
|
|
if err := recoveredFirstRequest.Verify(); err == nil {
|
|
t.Fatal("Expected Verify to fail since the message is not signed")
|
|
}
|
|
|
|
// We now assume that the feed ypdate was created and propagated.
|
|
|
|
const expectedSignature = "0x7235b27a68372ddebcf78eba48543fa460864b0b0e99cb533fcd3664820e603312d29426dd00fb39628f5299480a69bf6e462838d78de49ce0704c754c9deb2601"
|
|
const expectedJSON = `{"feed":{"topic":"0x6120676f6f6420746f706963206e616d65000000000000000000000000000000","user":"0x876a8936a7cd0b79ef0735ad0896c1afe278781c"},"epoch":{"time":1000,"level":1},"protocolVersion":0,"data":"0x5468697320686f75722773207570646174653a20537761726d2039392e3020686173206265656e2072656c656173656421"}`
|
|
|
|
//Put together an unsigned update request that we will serialize to send it to the signer.
|
|
data := []byte("This hour's update: Swarm 99.0 has been released!")
|
|
request := &Request{
|
|
Update: Update{
|
|
ID: ID{
|
|
Epoch: lookup.Epoch{
|
|
Time: 1000,
|
|
Level: 1,
|
|
},
|
|
Feed: firstRequest.Update.Feed,
|
|
},
|
|
data: data,
|
|
},
|
|
}
|
|
|
|
messageRawData, err = request.MarshalJSON()
|
|
if err != nil {
|
|
t.Fatalf("Error encoding update request: %s", err)
|
|
}
|
|
|
|
equalJSON, err := areEqualJSON(string(messageRawData), expectedJSON)
|
|
if err != nil {
|
|
t.Fatalf("Error decoding update request JSON: %s", err)
|
|
}
|
|
if !equalJSON {
|
|
t.Fatalf("Received a different JSON message. Expected %s, got %s", expectedJSON, string(messageRawData))
|
|
}
|
|
|
|
// now the encoded message messageRawData is sent over the wire and arrives to the signer
|
|
|
|
//Attempt to extract an UpdateRequest out of the encoded message
|
|
var recoveredRequest Request
|
|
if err := recoveredRequest.UnmarshalJSON(messageRawData); err != nil {
|
|
t.Fatalf("Error decoding update request: %s", err)
|
|
}
|
|
|
|
//sign the request and see if it matches our predefined signature above.
|
|
if err := recoveredRequest.Sign(charlie); err != nil {
|
|
t.Fatalf("Error signing request: %s", err)
|
|
}
|
|
|
|
compareByteSliceToExpectedHex(t, "signature", recoveredRequest.Signature[:], expectedSignature)
|
|
|
|
// mess with the signature and see what happens. To alter the signature, we briefly decode it as JSON
|
|
// to alter the signature field.
|
|
var j updateRequestJSON
|
|
if err := json.Unmarshal([]byte(expectedJSON), &j); err != nil {
|
|
t.Fatal("Error unmarshalling test json, check expectedJSON constant")
|
|
}
|
|
j.Signature = "Certainly not a signature"
|
|
corruptMessage, _ := json.Marshal(j) // encode the message with the bad signature
|
|
var corruptRequest Request
|
|
if err = corruptRequest.UnmarshalJSON(corruptMessage); err == nil {
|
|
t.Fatal("Expected DecodeUpdateRequest to fail when trying to interpret a corrupt message with an invalid signature")
|
|
}
|
|
|
|
// Now imagine Bob wants to create an update of his own about the same Feed,
|
|
// signing a message with his private key
|
|
if err := request.Sign(bob); err != nil {
|
|
t.Fatalf("Error signing: %s", err)
|
|
}
|
|
|
|
// Now Bob encodes the message to send it over the wire...
|
|
messageRawData, err = request.MarshalJSON()
|
|
if err != nil {
|
|
t.Fatalf("Error encoding message:%s", err)
|
|
}
|
|
|
|
// ... the message arrives to our Swarm node and it is decoded.
|
|
recoveredRequest = Request{}
|
|
if err := recoveredRequest.UnmarshalJSON(messageRawData); err != nil {
|
|
t.Fatalf("Error decoding message:%s", err)
|
|
}
|
|
|
|
// Before checking what happened with Bob's update, let's see what would happen if we mess
|
|
// with the signature big time to see if Verify catches it
|
|
savedSignature := *recoveredRequest.Signature // save the signature for later
|
|
binary.LittleEndian.PutUint64(recoveredRequest.Signature[5:], 556845463424) // write some random data to break the signature
|
|
if err = recoveredRequest.Verify(); err == nil {
|
|
t.Fatal("Expected Verify to fail on corrupt signature")
|
|
}
|
|
|
|
// restore the Bob's signature from corruption
|
|
*recoveredRequest.Signature = savedSignature
|
|
|
|
// Now the signature is not corrupt
|
|
if err = recoveredRequest.Verify(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Reuse object and sign with our friend Charlie's private key
|
|
if err := recoveredRequest.Sign(charlie); err != nil {
|
|
t.Fatalf("Error signing with the correct private key: %s", err)
|
|
}
|
|
|
|
// And now, Verify should work since this update now belongs to Charlie
|
|
if err = recoveredRequest.Verify(); err != nil {
|
|
t.Fatalf("Error verifying that Charlie, can sign a reused request object:%s", err)
|
|
}
|
|
|
|
// mess with the lookup key to make sure Verify fails:
|
|
recoveredRequest.Time = 77999 // this will alter the lookup key
|
|
if err = recoveredRequest.Verify(); err == nil {
|
|
t.Fatalf("Expected Verify to fail since the lookup key has been altered")
|
|
}
|
|
}
|
|
|
|
func getTestRequest() *Request {
|
|
return &Request{
|
|
Update: *getTestFeedUpdate(),
|
|
}
|
|
}
|
|
|
|
func TestUpdateChunkSerializationErrorChecking(t *testing.T) {
|
|
|
|
// Test that parseUpdate fails if the chunk is too small
|
|
var r Request
|
|
if err := r.fromChunk(storage.ZeroAddr, make([]byte, minimumUpdateDataLength-1+signatureLength)); err == nil {
|
|
t.Fatalf("Expected request.fromChunk to fail when chunkData contains less than %d bytes", minimumUpdateDataLength)
|
|
}
|
|
|
|
r = *getTestRequest()
|
|
|
|
_, err := r.toChunk()
|
|
if err == nil {
|
|
t.Fatal("Expected request.toChunk to fail when there is no data")
|
|
}
|
|
r.data = []byte("Al bien hacer jamás le falta premio") // put some arbitrary length data
|
|
_, err = r.toChunk()
|
|
if err == nil {
|
|
t.Fatal("expected request.toChunk to fail when there is no signature")
|
|
}
|
|
|
|
charlie := newCharlieSigner()
|
|
if err := r.Sign(charlie); err != nil {
|
|
t.Fatalf("error signing:%s", err)
|
|
}
|
|
|
|
chunk, err := r.toChunk()
|
|
if err != nil {
|
|
t.Fatalf("error creating update chunk:%s", err)
|
|
}
|
|
|
|
compareByteSliceToExpectedHex(t, "chunk", chunk.Data(), "0x0000000000000000776f726c64206e657773207265706f72742c20657665727920686f7572000000876a8936a7cd0b79ef0735ad0896c1afe278781ce803000000000019416c206269656e206861636572206a616dc3a173206c652066616c7461207072656d696f5a0ffe0bc27f207cd5b00944c8b9cee93e08b89b5ada777f123ac535189333f174a6a4ca2f43a92c4a477a49d774813c36ce8288552c58e6205b0ac35d0507eb00")
|
|
|
|
var recovered Request
|
|
recovered.fromChunk(chunk.Address(), chunk.Data())
|
|
if !reflect.DeepEqual(recovered, r) {
|
|
t.Fatal("Expected recovered SignedResource update to equal the original one")
|
|
}
|
|
}
|
|
|
|
// check that signature address matches update signer address
|
|
func TestReverse(t *testing.T) {
|
|
|
|
epoch := lookup.Epoch{
|
|
Time: 7888,
|
|
Level: 6,
|
|
}
|
|
|
|
// make fake timeProvider
|
|
timeProvider := &fakeTimeProvider{
|
|
currentTime: startTime.Time,
|
|
}
|
|
|
|
// signer containing private key
|
|
signer := newAliceSigner()
|
|
|
|
// set up rpc and create resourcehandler
|
|
_, _, teardownTest, err := setupTest(timeProvider, signer)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer teardownTest()
|
|
|
|
topic, _ := NewTopic("Cervantes quotes", nil)
|
|
feed := Feed{
|
|
Topic: topic,
|
|
User: signer.Address(),
|
|
}
|
|
|
|
data := []byte("Donde una puerta se cierra, otra se abre")
|
|
|
|
request := new(Request)
|
|
request.Feed = feed
|
|
request.Epoch = epoch
|
|
request.data = data
|
|
|
|
// generate a chunk key for this request
|
|
key := request.Addr()
|
|
|
|
if err = request.Sign(signer); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
chunk, err := request.toChunk()
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// check that we can recover the owner account from the update chunk's signature
|
|
var checkUpdate Request
|
|
if err := checkUpdate.fromChunk(chunk.Address(), chunk.Data()); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
checkdigest, err := checkUpdate.GetDigest()
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
recoveredAddr, err := getUserAddr(checkdigest, *checkUpdate.Signature)
|
|
if err != nil {
|
|
t.Fatalf("Retrieve address from signature fail: %v", err)
|
|
}
|
|
originalAddr := crypto.PubkeyToAddress(signer.PrivKey.PublicKey)
|
|
|
|
// check that the metadata retrieved from the chunk matches what we gave it
|
|
if recoveredAddr != originalAddr {
|
|
t.Fatalf("addresses dont match: %x != %x", originalAddr, recoveredAddr)
|
|
}
|
|
|
|
if !bytes.Equal(key[:], chunk.Address()[:]) {
|
|
t.Fatalf("Expected chunk key '%x', was '%x'", key, chunk.Address())
|
|
}
|
|
if epoch != checkUpdate.Epoch {
|
|
t.Fatalf("Expected epoch to be '%s', was '%s'", epoch.String(), checkUpdate.Epoch.String())
|
|
}
|
|
if !bytes.Equal(data, checkUpdate.data) {
|
|
t.Fatalf("Expected data '%x', was '%x'", data, checkUpdate.data)
|
|
}
|
|
}
|