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dc4bc
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WIP: nodes interaction through HTTP

This commit is contained in:
programmer10110 2020-09-04 18:35:22 +03:00
parent d10602a70c
commit 132f31861d
4 changed files with 159 additions and 89 deletions
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45
client/client.go
View File

@ -12,7 +12,6 @@ import (
"sync"
"time"
"github.com/depools/dc4bc/airgapped"
"github.com/depools/dc4bc/client/types"
"github.com/depools/dc4bc/fsm/types/requests"
"github.com/google/uuid"
@ -35,7 +34,7 @@ const (
type Client struct {
sync.Mutex
logger *logger
Logger *logger
userName string
address string
pubKey ed25519.PublicKey
@ -44,7 +43,6 @@ type Client struct {
storage storage.Storage
keyStore KeyStore
qrProcessor qr.Processor
Airgapped *airgapped.AirgappedMachine
}
func NewClient(
@ -54,7 +52,6 @@ func NewClient(
storage storage.Storage,
keyStore KeyStore,
qrProcessor qr.Processor,
airgappedMachine *airgapped.AirgappedMachine,
) (*Client, error) {
keyPair, err := keyStore.LoadKeys(userName, "")
if err != nil {
@ -63,7 +60,7 @@ func NewClient(
return &Client{
ctx: ctx,
logger: newLogger(userName),
Logger: newLogger(userName),
userName: userName,
address: keyPair.GetAddr(),
pubKey: keyPair.Pub,
@ -71,7 +68,6 @@ func NewClient(
storage: storage,
keyStore: keyStore,
qrProcessor: qrProcessor,
Airgapped: airgappedMachine,
}, nil
}
@ -100,38 +96,15 @@ func (c *Client) Poll() error {
for _, message := range messages {
if message.RecipientAddr == "" || message.RecipientAddr == c.GetAddr() {
c.logger.Log("Handling message with offset %d, type %s", message.Offset, message.Event)
c.Logger.Log("Handling message with offset %d, type %s", message.Offset, message.Event)
if err := c.ProcessMessage(message); err != nil {
c.logger.Log("Failed to process message: %v", err)
c.Logger.Log("Failed to process message: %v", err)
} else {
c.logger.Log("Successfully processed message with offset %d, type %s",
c.Logger.Log("Successfully processed message with offset %d, type %s",
message.Offset, message.Event)
}
}
}
operations, err := c.GetOperations()
if err != nil {
c.logger.Log("Failed to get operations: %v", err)
}
c.logger.Log("Got %d Operations from pool", len(operations))
for _, operation := range operations {
c.logger.Log("Handling operation %s in airgapped", operation.Type)
processedOperation, err := c.Airgapped.HandleOperation(*operation)
if err != nil {
c.logger.Log("Failed to handle operation: %v", err)
}
c.logger.Log("Got %d Processed Operations from Airgapped", len(operations))
c.logger.Log("Operation %s handled in airgapped, result event is %s",
operation.Event, processedOperation.Event)
if err = c.handleProcessedOperation(processedOperation); err != nil {
c.logger.Log("Failed to handle processed operation: %v", err)
} else {
c.logger.Log("Successfully handled processed operation %s", processedOperation.Event)
}
}
case <-c.ctx.Done():
log.Println("Context closed, stop polling...")
return nil
@ -169,7 +142,7 @@ func (c *Client) ProcessMessage(message storage.Message) error {
return fmt.Errorf("failed to Do operation in FSM: %w", err)
}
c.logger.Log("message %s done successfully from %s", message.Event, message.SenderAddr)
c.Logger.Log("message %s done successfully from %s", message.Event, message.SenderAddr)
if resp.State == spf.StateSignatureProposalCollected {
fsmInstance, err = state_machines.FromDump(fsmDump)
@ -223,7 +196,7 @@ func (c *Client) ProcessMessage(message storage.Message) error {
}
}
default:
c.logger.Log("State %s does not require an operation", resp.State)
c.Logger.Log("State %s does not require an operation", resp.State)
}
if operation != nil {
@ -291,10 +264,10 @@ func (c *Client) ReadProcessedOperation() error {
return fmt.Errorf("failed to unmarshal processed operation")
}
return c.handleProcessedOperation(operation)
return c.HandleProcessedOperation(operation)
}
func (c *Client) handleProcessedOperation(operation types.Operation) error {
func (c *Client) HandleProcessedOperation(operation types.Operation) error {
storedOperation, err := c.state.GetOperationByID(operation.ID)
if err != nil {
return fmt.Errorf("failed to find matching operation: %w", err)

4
client/client_test.go
View File

@ -49,7 +49,6 @@ func TestClient_ProcessMessage(t *testing.T) {
stg,
keyStore,
qrProcessor,
nil,
)
req.NoError(err)
@ -132,7 +131,6 @@ func TestClient_GetOperationsList(t *testing.T) {
stg,
keyStore,
qrProcessor,
nil,
)
req.NoError(err)
@ -180,7 +178,6 @@ func TestClient_GetOperationQRPath(t *testing.T) {
stg,
keyStore,
qrProcessor,
nil,
)
req.NoError(err)
@ -232,7 +229,6 @@ func TestClient_ReadProcessedOperation(t *testing.T) {
stg,
keyStore,
qrProcessor,
nil,
)
req.NoError(err)

89
client/http_server.go
View File

@ -1,9 +1,15 @@
package client
import (
"crypto/md5"
"encoding/hex"
"encoding/json"
"fmt"
"github.com/depools/dc4bc/client/types"
"github.com/depools/dc4bc/fsm/fsm"
spf "github.com/depools/dc4bc/fsm/state_machines/signature_proposal_fsm"
sif "github.com/depools/dc4bc/fsm/state_machines/signing_proposal_fsm"
"github.com/google/uuid"
"image"
"io/ioutil"
"log"
@ -14,8 +20,8 @@ import (
)
type Response struct {
ErrorMessage string `json:"error_message,omitempty"`
Result interface{} `json:"result"`
ErrorMessage string `json:"error_message,omitempty"`
Result interface{} `json:"result"`
}
func rawResponse(w http.ResponseWriter, response []byte) {
@ -61,6 +67,10 @@ func (c *Client) StartHTTPServer(listenAddr string) error {
mux.HandleFunc("/readProcessedOperation", c.readProcessedOperationFromBodyHandler)
mux.HandleFunc("/getOperationQR", c.getOperationQRToBodyHandler)
mux.HandleFunc("/startDKG", c.startDKGHandler)
mux.HandleFunc("/proposeSignMessage", c.proposeSignDataHandler)
c.Logger.Log("Starting HTTP server on address: %s", listenAddr)
return http.ListenAndServe(listenAddr, mux)
}
@ -74,6 +84,7 @@ func (c *Client) sendMessageHandler(w http.ResponseWriter, r *http.Request) {
errorResponse(w, http.StatusBadRequest, fmt.Sprintf("failed to read request body: %v", err))
return
}
defer r.Body.Close()
var msg storage.Message
if err = json.Unmarshal(reqBytes, &msg); err != nil {
@ -193,10 +204,80 @@ func (c *Client) readProcessedOperationFromBodyHandler(w http.ResponseWriter, r
fmt.Sprintf("failed to unmarshal processed operation: %v", err))
return
}
if err := c.handleProcessedOperation(operation); err != nil {
if err := c.HandleProcessedOperation(operation); err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to handle an operation: %v", err))
return
}
successResponse(w, "ok")
}
}
func (c *Client) startDKGHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
errorResponse(w, http.StatusBadRequest, "Wrong HTTP method")
return
}
reqBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to read body: %v", err))
return
}
defer r.Body.Close()
dkgRoundID := md5.Sum(reqBody)
message, err := c.buildMessage(hex.EncodeToString(dkgRoundID[:]), spf.EventInitProposal, reqBody)
if err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to build message: %v", err))
return
}
if err = c.SendMessage(*message); err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to send message: %v", err))
return
}
successResponse(w, "ok")
}
func (c *Client) proposeSignDataHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != http.MethodPost {
errorResponse(w, http.StatusBadRequest, "Wrong HTTP method")
return
}
reqBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to read body: %v", err))
return
}
defer r.Body.Close()
var req map[string][]byte
if err = json.Unmarshal(reqBody, &req); err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to umarshal request: %v", err))
return
}
message, err := c.buildMessage(hex.EncodeToString(req["dkgID"]), sif.EventSigningStart, req["data"])
if err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to build message: %v", err))
}
if err = c.SendMessage(*message); err != nil {
errorResponse(w, http.StatusInternalServerError, fmt.Sprintf("failed to send message: %v", err))
return
}
successResponse(w, "ok")
}
func (c *Client) buildMessage(dkgRoundID string, event fsm.Event, data []byte) (*storage.Message, error) {
message := storage.Message{
ID: uuid.New().String(),
DkgRoundID: dkgRoundID,
Event: string(event),
Data: data,
SenderAddr: c.GetAddr(),
}
signature, err := c.signMessage(message.Bytes())
if err != nil {
return nil, fmt.Errorf("failed to sign message: %w", err)
}
message.Signature = signature
return &message, nil
}

110
main.go
View File

@ -1,41 +1,68 @@
package main
import (
"bytes"
"context"
"crypto/ed25519"
"crypto/md5"
"encoding/hex"
"encoding/json"
"fmt"
_ "image/jpeg"
"log"
"net/http"
"sync"
"time"
"github.com/depools/dc4bc/airgapped"
"github.com/depools/dc4bc/client"
spf "github.com/depools/dc4bc/fsm/state_machines/signature_proposal_fsm"
sif "github.com/depools/dc4bc/fsm/state_machines/signing_proposal_fsm"
"github.com/depools/dc4bc/fsm/types/requests"
"github.com/depools/dc4bc/qr"
"github.com/depools/dc4bc/storage"
"github.com/google/uuid"
)
type Transport struct {
nodes []*client.Client
}
type node struct {
client *client.Client
keyPair *client.KeyPair
air *airgapped.AirgappedMachine
}
func (n *node) run() {
for {
operations, err := n.client.GetOperations()
if err != nil {
n.client.Logger.Log("Failed to get operations: %v", err)
}
if len(operations) == 0 {
time.Sleep(1 * time.Second)
continue
}
n.client.Logger.Log("Got %d Operations from pool", len(operations))
for _, operation := range operations {
n.client.Logger.Log("Handling operation %s in airgapped", operation.Type)
processedOperation, err := n.air.HandleOperation(*operation)
if err != nil {
n.client.Logger.Log("Failed to handle operation: %v", err)
}
n.client.Logger.Log("Got %d Processed Operations from Airgapped", len(operations))
n.client.Logger.Log("Operation %s handled in airgapped, result event is %s",
operation.Event, processedOperation.Event)
if err = n.client.HandleProcessedOperation(processedOperation); err != nil {
n.client.Logger.Log("Failed to handle processed operation: %v", err)
} else {
n.client.Logger.Log("Successfully handled processed operation %s", processedOperation.Event)
}
}
}
}
func main() {
var numNodes = 4
var threshold = 3
var storagePath = "/tmp/dc4bc_storage"
var nodes = make([]*node, 4)
var nodes = make([]*node, numNodes)
startingPort := 8080
for nodeID := 0; nodeID < numNodes; nodeID++ {
var ctx = context.Background()
var userName = fmt.Sprintf("node_%d", nodeID)
@ -71,39 +98,42 @@ func main() {
stg,
keyStore,
qr.NewCameraProcessor(),
airgappedMachine,
)
if err != nil {
log.Fatalf("node %d failed to init client: %v\n", nodeID, err)
}
clt.Airgapped.SetAddress(clt.GetAddr())
airgappedMachine.SetAddress(clt.GetAddr())
nodes[nodeID] = &node{
client: clt,
keyPair: keyPair,
air: airgappedMachine,
}
}
// Each node starts to Poll().
for nodeID, node := range nodes {
for nodeID, n := range nodes {
go func(nodeID int, node *node, port int) {
if err := node.client.StartHTTPServer(fmt.Sprintf(":%d", port)); err != nil {
log.Fatalf("failed to start HTTP server for nodeID #%d: %v\n", nodeID, err)
}
}(nodeID, n, startingPort)
startingPort++
go nodes[nodeID].run()
go func(nodeID int, node *client.Client) {
if err := node.Poll(); err != nil {
log.Fatalf("client %d poller failed: %v\n", nodeID, err)
}
}(nodeID, node.client)
}(nodeID, n.client)
log.Printf("client %d started...\n", nodeID)
}
stg, err := storage.NewFileStorage(storagePath)
if err != nil {
log.Fatalf("main namespace failed to init storage: %v\n", err)
}
// Node1 tells other participants to start DKG.
var participants []*requests.SignatureProposalParticipantsEntry
for _, node := range nodes {
dkgPubKey, err := node.client.Airgapped.GetPubKey().MarshalBinary()
dkgPubKey, err := node.air.GetPubKey().MarshalBinary()
if err != nil {
log.Fatalln("failed to get DKG pubKey:", err.Error())
}
@ -123,45 +153,35 @@ func main() {
log.Fatalf("failed to marshal SignatureProposalParticipantsListRequest: %v\n", err)
}
dkgRoundID := md5.Sum(messageDataBz)
message := storage.Message{
ID: uuid.New().String(),
DkgRoundID: hex.EncodeToString(dkgRoundID[:]),
Event: string(spf.EventInitProposal),
Data: messageDataBz,
SenderAddr: nodes[0].client.GetAddr(),
}
message.Signature = ed25519.Sign(nodes[0].keyPair.Priv, message.Bytes())
if _, err := stg.Send(message); err != nil {
log.Fatalf("Failed to send %+v to storage: %v\n", message, err)
if _, err := http.Post(fmt.Sprintf("http://localhost:%d/startDKG", startingPort-1),
"application/json", bytes.NewReader(messageDataBz)); err != nil {
log.Fatalf("failed to send HTTP request to start DKG: %v\n", err)
}
// i haven't a better idea to test signing without big changes in the client code
time.Sleep(10 * time.Second)
log.Println("Propose message to sign")
dkgRoundID := md5.Sum(messageDataBz)
messageDataSign := requests.SigningProposalStartRequest{
ParticipantId: 0,
ParticipantId: len(nodes) - 1,
SrcPayload: []byte("message to sign"),
CreatedAt: time.Now(),
}
messageDataBz, err = json.Marshal(messageDataSign)
messageDataSignBz, err := json.Marshal(messageDataSign)
if err != nil {
log.Fatalf("failed to marshal SigningProposalStartRequest: %v\n", err)
}
messageDataBz, err = json.Marshal(map[string][]byte{"data": messageDataSignBz,
"dkgID": dkgRoundID[:]})
if err != nil {
log.Fatalf("failed to marshal SignatureProposalParticipantsListRequest: %v\n", err)
}
message = storage.Message{
ID: uuid.New().String(),
DkgRoundID: hex.EncodeToString(dkgRoundID[:]),
Event: string(sif.EventSigningStart),
Data: messageDataBz,
SenderAddr: nodes[0].client.GetAddr(),
}
message.Signature = ed25519.Sign(nodes[0].keyPair.Priv, message.Bytes())
if _, err := stg.Send(message); err != nil {
log.Fatalf("Failed to send %+v to storage: %v\n", message, err)
if _, err := http.Post(fmt.Sprintf("http://localhost:%d/proposeSignMessage", startingPort-1),
"application/json", bytes.NewReader(messageDataBz)); err != nil {
log.Fatalf("failed to send HTTP request to sign message: %v\n", err)
}
var wg = sync.WaitGroup{}