parent
0e10b47c42
commit
9c65ad4af3
@ -0,0 +1,59 @@
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package connections
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import (
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"cwtch.im/cwtch/utils"
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"git.openprivacy.ca/cwtch.im/tapir/applications"
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"git.openprivacy.ca/cwtch.im/tapir/networks/tor"
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"git.openprivacy.ca/cwtch.im/tapir/primitives"
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"git.openprivacy.ca/cwtch.im/tapir/primitives/privacypass"
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"git.openprivacy.ca/openprivacy/connectivity"
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"git.openprivacy.ca/openprivacy/log"
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"reflect"
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"time"
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)
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// MakePayment uses the PoW based token protocol to obtain more tokens
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func MakePayment(tokenServiceOnion string, tokenService *privacypass.TokenServer, acn connectivity.ACN, handler TokenBoardHandler) error {
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log.Debugf("making a payment")
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id, sk := primitives.InitializeEphemeralIdentity()
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client := new(tor.BaseOnionService)
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client.Init(acn, sk, &id)
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defer client.Shutdown()
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tokenApplication := new(applications.TokenApplication)
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tokenApplication.TokenService = tokenService
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powTokenApp := new(applications.ApplicationChain).
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ChainApplication(new(applications.ProofOfWorkApplication), applications.SuccessfulProofOfWorkCapability).
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ChainApplication(tokenApplication, applications.HasTokensCapability)
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log.Debugf("waiting for successful PoW auth...")
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tp := utils.TimeoutPolicy(time.Second * 30)
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err := tp.ExecuteAction(func() error {
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connected, err := client.Connect(tokenServiceOnion, powTokenApp)
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if connected && err == nil {
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log.Debugf("waiting for successful token acquisition...")
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conn, err := client.WaitForCapabilityOrClose(tokenServiceOnion, applications.HasTokensCapability)
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if err == nil {
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powtapp, ok := conn.App().(*applications.TokenApplication)
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if ok {
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log.Debugf("updating tokens")
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handler.NewTokenHandler(tokenServiceOnion, powtapp.Tokens)
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log.Debugf("transcript: %v", powtapp.Transcript().OutputTranscriptToAudit())
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conn.Close()
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return nil
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}
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log.Errorf("invalid cast of powapp. this should never happen %v %v", powtapp, reflect.TypeOf(conn.App()))
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return nil
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}
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return nil
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}
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return err
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})
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// we timed out
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if err != nil {
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log.Debugf("make payment timeout...")
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return err
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}
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return err
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}
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@ -0,0 +1,150 @@
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package main
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import (
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"crypto/rand"
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"cwtch.im/cwtch/model"
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"cwtch.im/cwtch/model/constants"
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"cwtch.im/cwtch/protocol/connections"
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"cwtch.im/cwtch/protocol/groups"
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"encoding/base64"
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"encoding/json"
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"flag"
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"fmt"
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"git.openprivacy.ca/cwtch.im/tapir/primitives/privacypass"
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"git.openprivacy.ca/openprivacy/connectivity/tor"
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"git.openprivacy.ca/openprivacy/log"
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"github.com/gtank/ristretto255"
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mrand "math/rand"
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"os"
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path "path/filepath"
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"strings"
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"time"
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)
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var tool = flag.String("tool", "", "the tool to use")
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var bundle = flag.String("bundle", "", "a server bundle to parse")
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func main() {
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flag.Parse()
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if *tool == "" {
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fmt.Fprintf(os.Stderr, "usage: cwtch_tools -tool <tool>\n")
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flag.PrintDefaults()
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}
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switch *tool {
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case "bundleparse":
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bundle, err := bundleParse(*bundle)
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if err == nil {
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fmt.Printf("bundle: %s\n", bundle.Serialize())
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} else {
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fmt.Printf("error parsing bundle: %v", err)
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}
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case "gettokens":
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getTokens(*bundle)
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default:
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fmt.Fprintf(os.Stderr, "unknown tool: %s \n", *tool)
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}
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}
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func bundleParse(bundle string) (*model.KeyBundle, error) {
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if strings.HasPrefix(bundle, constants.ServerPrefix) {
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bundle, err := base64.StdEncoding.DecodeString(bundle[len(constants.ServerPrefix):])
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if err != nil {
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fmt.Printf("invalid server bundle: %v\n", err)
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}
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keyBundle, err := model.DeserializeAndVerify([]byte(bundle))
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return keyBundle, err
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} else {
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return nil, fmt.Errorf("unknown bundle prefix")
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}
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}
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func getTokens(bundle string) {
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log.SetLevel(log.LevelDebug)
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keyBundle, err := bundleParse(bundle)
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if err != nil {
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log.Errorf("error parsing keybundle: %v", err)
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return
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}
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privacyPassKey, err := keyBundle.GetKey(model.KeyTypePrivacyPass)
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if err != nil {
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log.Errorf("error parsing keybundle: %v", err)
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return
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}
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tokenServiceKey, err := keyBundle.GetKey(model.KeyTypeTokenOnion)
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if err != nil {
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log.Errorf("error parsing keybundle: %v", err)
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return
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}
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os.Mkdir("tordir", 0700)
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dataDir := path.Join("tordir", "tor")
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os.MkdirAll(dataDir, 0700)
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// we don't need real randomness for the port, just to avoid a possible conflict...
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mrand.Seed(int64(time.Now().Nanosecond()))
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socksPort := mrand.Intn(1000) + 9051
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controlPort := mrand.Intn(1000) + 9052
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// generate a random password
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key := make([]byte, 64)
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_, err = rand.Read(key)
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if err != nil {
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log.Errorf("insufficient randomness: %v", err)
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return
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}
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torDataDir := "./data-dir-cwtchtool"
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if err = os.MkdirAll(torDataDir, 0700); err != nil {
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log.Errorf("could not create data dir")
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return
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}
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tor.NewTorrc().WithSocksPort(socksPort).WithOnionTrafficOnly().WithHashedPassword(base64.StdEncoding.EncodeToString(key)).WithControlPort(controlPort).Build("tordir/tor/torrc")
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acn, err := tor.NewTorACNWithAuth("./tordir", path.Join("..", "tor"), torDataDir, controlPort, tor.HashedPasswordAuthenticator{Password: base64.StdEncoding.EncodeToString(key)})
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if err != nil {
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log.Errorf("Could not start Tor: %v", err)
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return
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}
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acn.WaitTillBootstrapped()
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defer acn.Close()
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Y := new(ristretto255.Element)
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Y.UnmarshalText([]byte(privacyPassKey))
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tokenServer := privacypass.NewTokenServer()
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tokenServer.Y = Y
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err = connections.MakePayment(string(tokenServiceKey), tokenServer, acn, Handler{})
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if err != nil {
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log.Errorf("timed out trying to get payments")
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}
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}
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type Handler struct {
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}
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func (h Handler) GroupMessageHandler(server string, gm *groups.EncryptedGroupMessage) {
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}
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func (h Handler) ServerAuthedHandler(server string) {
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}
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func (h Handler) ServerSyncedHandler(server string) {
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}
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func (h Handler) ServerClosedHandler(server string) {
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}
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func (h Handler) NewTokenHandler(tokenService string, tokens []*privacypass.Token) {
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data, _ := json.Marshal(tokens)
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os.WriteFile("tokens", data, 0600)
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}
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func (h Handler) FetchToken(tokenService string) (*privacypass.Token, int, error) {
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return nil, 0, nil
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}
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