mirror of https://github.com/status-im/go-waku.git
271 lines
6.6 KiB
Go
271 lines
6.6 KiB
Go
package rpc
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import (
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"crypto/ecdsa"
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"crypto/rand"
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"fmt"
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"net/http"
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"strings"
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"sync"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/waku-org/go-waku/waku/v2/node"
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"github.com/waku-org/go-waku/waku/v2/payload"
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"github.com/waku-org/go-waku/waku/v2/protocol"
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"github.com/waku-org/go-waku/waku/v2/protocol/pb"
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"github.com/waku-org/go-waku/waku/v2/protocol/relay"
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"github.com/waku-org/go-waku/waku/v2/utils"
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"go.uber.org/zap"
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)
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type PrivateService struct {
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node *node.WakuNode
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log *zap.Logger
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messages map[string][]*pb.WakuMessage
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cacheCapacity int
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messagesMutex sync.RWMutex
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runner *runnerService
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}
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type SymmetricKeyReply string
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type KeyPairReply struct {
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PrivateKey string `json:"privateKey"`
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PublicKey string `json:"publicKey"`
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}
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type SymmetricMessageArgs struct {
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Topic string `json:"topic"`
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Message *RPCWakuMessage `json:"message"`
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SymKey string `json:"symkey"`
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}
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type AsymmetricMessageArgs struct {
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Topic string `json:"topic"`
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Message *RPCWakuMessage `json:"message"`
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PublicKey string `json:"publicKey"`
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}
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type SymmetricMessagesArgs struct {
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Topic string `json:"topic"`
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SymKey string `json:"symkey"`
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}
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type AsymmetricMessagesArgs struct {
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Topic string `json:"topic"`
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PrivateKey string `json:"privateKey"`
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}
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func NewPrivateService(node *node.WakuNode, cacheCapacity int, log *zap.Logger) *PrivateService {
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p := &PrivateService{
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node: node,
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cacheCapacity: cacheCapacity,
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messages: make(map[string][]*pb.WakuMessage),
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log: log.Named("private"),
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}
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p.runner = newRunnerService(node.Broadcaster(), p.addEnvelope)
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return p
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}
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func (p *PrivateService) addEnvelope(envelope *protocol.Envelope) {
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p.messagesMutex.Lock()
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defer p.messagesMutex.Unlock()
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if _, ok := p.messages[envelope.PubsubTopic()]; !ok {
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p.messages[envelope.PubsubTopic()] = make([]*pb.WakuMessage, 0)
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}
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// Keep a specific max number of messages per topic
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if len(p.messages[envelope.PubsubTopic()]) >= p.cacheCapacity {
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p.messages[envelope.PubsubTopic()] = p.messages[envelope.PubsubTopic()][1:]
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}
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p.messages[envelope.PubsubTopic()] = append(p.messages[envelope.PubsubTopic()], envelope.Message())
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}
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func (p *PrivateService) GetV1SymmetricKey(req *http.Request, args *Empty, reply *SymmetricKeyReply) error {
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key := [32]byte{}
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_, err := rand.Read(key[:])
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if err != nil {
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return err
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}
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*reply = SymmetricKeyReply(hexutil.Encode(key[:]))
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return nil
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}
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func (p *PrivateService) GetV1AsymmetricKeypair(req *http.Request, args *Empty, reply *KeyPairReply) error {
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privateKey, err := crypto.GenerateKey()
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if err != nil {
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return err
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}
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privateKeyBytes := crypto.FromECDSA(privateKey)
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publicKey := privateKey.Public()
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publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
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if !ok {
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return fmt.Errorf("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
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}
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publicKeyBytes := crypto.FromECDSAPub(publicKeyECDSA)
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reply.PrivateKey = hexutil.Encode(privateKeyBytes[:])
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reply.PublicKey = hexutil.Encode(publicKeyBytes[:])
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return nil
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}
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func (p *PrivateService) PostV1SymmetricMessage(req *http.Request, args *SymmetricMessageArgs, reply *SuccessReply) error {
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symKeyBytes, err := utils.DecodeHexString(args.SymKey)
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if err != nil {
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return fmt.Errorf("invalid symmetric key: %w", err)
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}
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keyInfo := new(payload.KeyInfo)
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keyInfo.Kind = payload.Symmetric
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keyInfo.SymKey = symKeyBytes
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msg := args.Message
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msg.Version = 1
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protoMsg := msg.toProto()
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err = payload.EncodeWakuMessage(protoMsg, keyInfo)
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if err != nil {
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return err
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}
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topic := args.Topic
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if topic == "" {
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topic = relay.DefaultWakuTopic
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}
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_, err = p.node.Relay().PublishToTopic(req.Context(), protoMsg, topic)
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if err != nil {
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return err
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}
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*reply = true
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return nil
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}
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func (p *PrivateService) PostV1AsymmetricMessage(req *http.Request, args *AsymmetricMessageArgs, reply *bool) error {
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keyInfo := new(payload.KeyInfo)
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keyInfo.Kind = payload.Asymmetric
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pubKeyBytes, err := utils.DecodeHexString(args.PublicKey)
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if err != nil {
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return fmt.Errorf("public key cannot be decoded: %v", err)
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}
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pubKey, err := crypto.UnmarshalPubkey(pubKeyBytes)
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if err != nil {
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return fmt.Errorf("public key cannot be unmarshalled: %v", err)
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}
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keyInfo.PubKey = *pubKey
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msg := args.Message
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msg.Version = 1
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protoMsg := msg.toProto()
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err = payload.EncodeWakuMessage(protoMsg, keyInfo)
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if err != nil {
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return err
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}
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topic := args.Topic
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if topic == "" {
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topic = relay.DefaultWakuTopic
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}
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_, err = p.node.Relay().PublishToTopic(req.Context(), protoMsg, topic)
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if err != nil {
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return err
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}
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*reply = true
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return nil
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}
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func (p *PrivateService) GetV1SymmetricMessages(req *http.Request, args *SymmetricMessagesArgs, reply *MessagesReply) error {
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p.messagesMutex.Lock()
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defer p.messagesMutex.Unlock()
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if _, ok := p.messages[args.Topic]; !ok {
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p.messages[args.Topic] = make([]*pb.WakuMessage, 0)
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}
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symKeyBytes, err := utils.DecodeHexString(args.SymKey)
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if err != nil {
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return fmt.Errorf("invalid symmetric key: %w", err)
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}
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messages := make([]*pb.WakuMessage, len(p.messages[args.Topic]))
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copy(messages, p.messages[args.Topic])
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p.messages[args.Topic] = make([]*pb.WakuMessage, 0)
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var decodedMessages []*pb.WakuMessage
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for _, msg := range messages {
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err := payload.DecodeWakuMessage(msg, &payload.KeyInfo{
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Kind: payload.Symmetric,
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SymKey: symKeyBytes,
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})
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if err != nil {
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continue
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}
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decodedMessages = append(decodedMessages, msg)
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}
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for i := range decodedMessages {
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*reply = append(*reply, ProtoToRPC(decodedMessages[i]))
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}
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return nil
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}
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func (p *PrivateService) GetV1AsymmetricMessages(req *http.Request, args *AsymmetricMessagesArgs, reply *MessagesReply) error {
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p.messagesMutex.Lock()
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defer p.messagesMutex.Unlock()
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if _, ok := p.messages[args.Topic]; !ok {
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p.messages[args.Topic] = make([]*pb.WakuMessage, 0)
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}
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messages := make([]*pb.WakuMessage, len(p.messages[args.Topic]))
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copy(messages, p.messages[args.Topic])
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p.messages[args.Topic] = make([]*pb.WakuMessage, 0)
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privKey, err := crypto.HexToECDSA(strings.TrimPrefix(args.PrivateKey, "0x"))
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if err != nil {
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return fmt.Errorf("invalid asymmetric key: %w", err)
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}
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var decodedMessages []*pb.WakuMessage
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for _, msg := range messages {
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err := payload.DecodeWakuMessage(msg, &payload.KeyInfo{
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Kind: payload.Asymmetric,
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PrivKey: privKey,
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})
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if err != nil {
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continue
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}
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decodedMessages = append(decodedMessages, msg)
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}
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for _, msg := range decodedMessages {
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*reply = append(*reply, ProtoToRPC(msg))
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}
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return nil
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}
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func (p *PrivateService) Start() {
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p.runner.Start()
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}
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func (p *PrivateService) Stop() {
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p.runner.Stop()
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}
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