fixes command injection bug and vendors using go mod

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.7
+FROM golang:1.13
 MAINTAINER Kyle Terry "[email protected]"
 COPY . /go/src/github.com/kyleterry/tenyks
 WORKDIR /go/src/github.com/kyleterry/tenyks

go.mod

@@ -0,0 +1,16 @@
+module github.com/kyleterry/tenyks
+
+go 1.12
+
+require (
+	github.com/go-stack/stack v1.5.2 // indirect
+	github.com/google/uuid v1.1.1
+	github.com/hashicorp/consul v0.0.0-20160928153228-d5b7530ec593
+	github.com/hashicorp/go-cleanhttp v0.5.1 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hashicorp/raft v1.1.1 // indirect
+	github.com/hashicorp/serf v0.8.3 // indirect
+	github.com/inconshreveable/log15 v0.0.0-20170216225631-39bacc234bf1
+	github.com/pebbe/zmq4 v0.0.0-20161107142727-86a301353efd
+	github.com/pkg/errors v0.8.1
+)

go.sum

@@ -0,0 +1,99 @@
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irc/connection.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"math"
 	"net"
+	"strings"
 	"sync"
 	"time"
 
@@ -181,6 +182,9 @@ func (conn *Connection) send() chan<- string {
 					Logger.Debug("stopping send loop", "connection", conn.Name)
 					return
 				}
+
+				line = strings.ReplaceAll(strings.ReplaceAll(line, "\r\n", "\n"), "\n", " ")
+
 				Logger.Debug("sending message", "connection", conn.Name, "msg", line)
 				conn.connectionMutex.Lock()
 				conn.MessagesSent += 1

service/handlers.go

@@ -152,7 +152,7 @@ func (c *Connection) PrivmsgServiceHandler(msg *Message) {
 
 func (c *Connection) RegisterServiceHandler(msg *Message) {
 	meta := msg.Meta
-	if meta.SID == nil || meta.SID.UUID == nil {
+	if meta.SID == nil || meta.SID.UUID.String() == "" {
 		Logger.Crit("uuid required to register with tenyks")
 		return
 	}
@@ -169,7 +169,7 @@ func (c *Connection) RegisterServiceHandler(msg *Message) {
 
 func (c *Connection) ByeServiceHandler(msg *Message) {
 	meta := msg.Meta
-	if meta.SID != nil && meta.SID.UUID != nil {
+	if meta.SID != nil && meta.SID.UUID.String() != "" {
 		Logger.Debug("service wants to leave", "name", meta.Name, "id", meta.SID.UUID.String())
 		srv := c.engine.ServiceRg.GetServiceByUUID(meta.SID.UUID.String())
 		if srv != nil {
@@ -210,7 +210,7 @@ func (c *Connection) PingServices() {
 
 func (c *Connection) PongServiceHandler(msg *Message) {
 	meta := msg.Meta
-	if meta.SID != nil && meta.SID.UUID != nil {
+	if meta.SID != nil && meta.SID.UUID.String() != "" {
 		c.engine.UpdateService(meta.SID.UUID.String(), ServiceOnline)
 	}
 }

service/ircify.go

@@ -2,13 +2,14 @@ package service
 
 import (
 	"encoding/json"
-	"errors"
 	"strings"
 
-	"github.com/Xe/uuid"
+	"github.com/google/uuid"
 	"github.com/kyleterry/tenyks/irc"
 )
 
+const maxMessages = 3
+
 type Message struct {
 	Target       string `json:"target"`
 	Command      string `json:"command"`
@@ -37,27 +38,38 @@ type Meta struct {
 
 func (self *ServiceID) UnmarshalJSON(b []byte) error {
 	s := strings.Trim(string(b), "\"")
-	self.UUID = uuid.Parse(s)
-	if self.UUID == nil {
-		return errors.New("Could not parse UUID")
+	id, err := uuid.Parse(s)
+	if err != nil {
+		return err
 	}
+
+	self.UUID = id
+
 	return nil
 }
 
 func (self *Connection) ircify(msg string) {
-	message, err := NewMessageFromString(msg)
-	if err != nil {
-		Logger.Error("error parsing message", "error", err)
-		return // Just ignore the shit we don't care about
+	lines := strings.Split(strings.ReplaceAll(msg, "\r\n", "\n"), "\n")
+
+	if len(lines) > maxMessages {
+		lines = lines[:maxMessages]
 	}
-	self.engine.CommandRg.RegistryMu.Lock()
-	defer self.engine.CommandRg.RegistryMu.Unlock()
-	handlers, ok := self.engine.CommandRg.Handlers[message.Command]
-	if ok {
-		Logger.Debug("dispatching handler", "command", message.Command)
-		for i := handlers.Front(); i != nil; i = i.Next() {
-			handler := i.Value.(*irc.Handler)
-			go handler.Fn(self, message)
+
+	for _, line := range lines {
+		message, err := NewMessageFromString(line)
+		if err != nil {
+			Logger.Error("error parsing message", "error", err)
+			return // Just ignore the shit we don't care about
+		}
+		self.engine.CommandRg.RegistryMu.Lock()
+		defer self.engine.CommandRg.RegistryMu.Unlock()
+		handlers, ok := self.engine.CommandRg.Handlers[message.Command]
+		if ok {
+			Logger.Debug("dispatching handler", "command", message.Command)
+			for i := handlers.Front(); i != nil; i = i.Next() {
+				handler := i.Value.(*irc.Handler)
+				go handler.Fn(self, message)
+			}
 		}
 	}
 }

service/registry.go

@@ -5,7 +5,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/Xe/uuid"
+	"github.com/google/uuid"
 )
 
 type ServiceRegistry struct {