Implement user authorization (login)

.gitignore

@@ -1 +1,2 @@
 /zr
+/.config.toml

cmd/zr/main.go

@@ -16,8 +16,10 @@ func main() {
 	var cfg core.Config
 	var configPath string
 	var generateConfig bool
+
+	defer logger.Init("auth-server", true, false, ioutil.Discard).Close() // TODO Make ability to use file for log output
 	flag.StringVar(&configPath, "config", "", "Path to config")
-	flag.BoolVar(&generateConfig, "gen_config", false, "Generate the config")
+	flag.BoolVar(&generateConfig, "gen-config", false, "Generate the config")
 	flag.Parse()
 	if generateConfig == true {
 		sampleConfig := &core.Config{}

core/app_context.go

@@ -10,13 +10,13 @@ import (
 )
 
 type AppContext struct {
-	router            *Router
+	router          *Router
-	authManager       *AuthManager
+	authManager     *AuthManager
-	connectionHandler *ConnectionHandler
+	sessionManager  *SessionManager
-	websocketServer   *WebsocketServer
+	websocketServer *WebsocketServer
-	cfg               *Config
+	cfg             *Config
-	database          *mongo.Database
+	database        *mongo.Database
-	userManager       *UserManager
+	userManager     *UserManager
 }
 
 func NewAppContext(cfg *Config) *AppContext {
@@ -32,19 +32,22 @@ func NewAppContext(cfg *Config) *AppContext {
 	}
 	appContext.router = router
 
-	authManager, err := NewAuthManager()
+	um, err := NewUserManager(appContext.database)
+	if err != nil {
+		logger.Fatalf("Unable to initialize user manager: %s", err.Error())
+	}
+	appContext.userManager = um
+
+	authManager, err := NewAuthManager(um, cfg.ServerID, router)
 	if err != nil {
 		logger.Fatalf("Unable to initialize authentication manager: %s", err.Error())
 	}
 	appContext.authManager = authManager
 
-	um := NewUserManager(appContext.database)
+	sessionManager := NewSessionManager(router)
-	appContext.userManager = um
+	appContext.sessionManager = sessionManager
 
-	connHandler := NewConnectionHandler(router)
+	wss := NewWebsocketServer(cfg, sessionManager)
-	appContext.connectionHandler = connHandler
-
-	wss := NewWebsocketServer(cfg, connHandler)
 	appContext.websocketServer = wss
 
 	return appContext
@@ -72,6 +75,5 @@ func (ac *AppContext) connectToDatabase() {
 }
 
 func (ac *AppContext) Run() error {
-	// TODO
+	return ac.websocketServer.Run()
-	return nil
 }

core/auth_handler.go

@@ -0,0 +1,81 @@
+package core
+
+import (
+	"github.com/cadmium-im/zirconium-go/core/models"
+	"github.com/cadmium-im/zirconium-go/core/models/auth"
+	"github.com/cadmium-im/zirconium-go/core/utils"
+	"github.com/fatih/structs"
+	"github.com/google/logger"
+	"github.com/mitchellh/mapstructure"
+	"go.mongodb.org/mongo-driver/mongo"
+)
+
+type AuthHandler struct {
+	serverID    string
+	authManager *AuthManager
+}
+
+func NewAuthHandler(am *AuthManager, serverID string) *AuthHandler {
+	return &AuthHandler{
+		authManager: am,
+		serverID:    serverID,
+	}
+}
+
+func (ah *AuthHandler) HandleMessage(s *Session, message models.BaseMessage) {
+	var authRequest auth.AuthRequest
+	err := mapstructure.Decode(message.Payload, &authRequest)
+	if err != nil {
+		logger.Errorf(err.Error())
+		return
+	}
+
+	switch authRequest.Type {
+	case "urn:cadmium:auth:simple":
+		{
+			token, claims, err := ah.authManager.HandleSimpleAuth(authRequest.Fields["username"].(string), authRequest.Fields["password"].(string))
+			if err != nil {
+				if mongo.ErrNoDocuments == err {
+					msg := utils.PrepareErrorMessage(message, "auth-failed", "invalid username", ah.serverID)
+					_ = s.Send(msg)
+					return
+				}
+				logger.Errorf(err.Error())
+				msg := utils.PrepareMessageInternalServerError(message, err, ah.serverID)
+				_ = s.Send(msg)
+				return
+			}
+			ar := auth.AuthResponse{
+				Token:    token,
+				DeviceID: claims.DeviceID,
+			}
+			payload := structs.Map(ar)
+			msg := models.NewBaseMessage(message.ID, message.MessageType, ah.serverID, nil, true, payload)
+			_ = s.Send(msg)
+			s.Claims = claims
+			return
+		}
+	case "urn:cadmium:auth:token":
+		{
+			claims, err := ah.authManager.ValidateToken(authRequest.Fields["token"].(string))
+			if err != nil {
+				logger.Errorf(err.Error())
+				msg := utils.PrepareMessageInternalServerError(message, err, ah.serverID)
+				_ = s.Send(msg)
+				return
+			}
+			s.Claims = claims
+			msg := models.NewBaseMessage(message.ID, message.MessageType, ah.serverID, nil, true, nil)
+			_ = s.Send(msg)
+			return
+		}
+	}
+}
+
+func (ah *AuthHandler) IsAuthorizationRequired() bool {
+	return false
+}
+
+func (ah *AuthHandler) HandlingType() string {
+	return "urn:cadmium:auth"
+}

core/auth_manager.go

@@ -3,6 +3,8 @@ package core
 import (
 	"encoding/base64"
 	"fmt"
+	"github.com/alexedwards/argon2id"
+	"github.com/cadmium-im/zirconium-go/core/utils"
 	"time"
 
 	"github.com/cadmium-im/zirconium-go/core/models"
@@ -16,7 +18,9 @@ const (
 )
 
 type AuthManager struct {
-	signingKey string // For now it is random bytes string represented in Base64
+	serverID    string
+	userManager *UserManager
+	signingKey  string // For now it is random bytes string represented in Base64
 }
 
 type JWTCustomClaims struct {
@@ -25,17 +29,22 @@ type JWTCustomClaims struct {
 	jwt.StandardClaims
 }
 
-func NewAuthManager() (*AuthManager, error) {
+func NewAuthManager(um *UserManager, serverID string, r *Router) (*AuthManager, error) {
-	am := &AuthManager{}
+	am := &AuthManager{
-	bytes, err := GenRandomBytes(SigningKeyBytesAmount)
+		userManager: um,
+		serverID:    serverID,
+	}
+	bytes, err := utils.GenRandomBytes(SigningKeyBytesAmount)
 	if err != nil {
 		return nil, err
 	}
 	am.signingKey = base64.RawStdEncoding.EncodeToString(bytes)
+	ah := NewAuthHandler(am, serverID)
+	r.RegisterC2SHandler(ah)
 	return am, nil
 }
 
-func (am *AuthManager) CreateNewToken(entityID *models.EntityID, deviceID string, tokenExpireTimeDuration time.Duration) (string, error) {
+func (am *AuthManager) CreateNewToken(entityID *models.EntityID, deviceID string, tokenExpireTimeDuration time.Duration) (*JWTCustomClaims, string, error) {
 	timeNow := time.Now()
 	expiringTime := timeNow.Add(tokenExpireTimeDuration)
 
@@ -59,9 +68,9 @@ func (am *AuthManager) CreateNewToken(entityID *models.EntityID, deviceID string
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
 	tokenString, err := token.SignedString(am.signingKey)
 	if err != nil {
-		return "", err
+		return nil, "", err
 	}
-	return tokenString, nil
+	return &claims, tokenString, nil
 }
 
 func (am *AuthManager) ValidateToken(tokenString string) (*JWTCustomClaims, error) {
@@ -84,3 +93,28 @@ func (am *AuthManager) ValidateToken(tokenString string) (*JWTCustomClaims, erro
 	}
 	return nil, err
 }
+
+func (am *AuthManager) HandleSimpleAuth(username string, pass string) (string, *JWTCustomClaims, error) {
+	user, err := am.userManager.GetByUsername(username)
+	if err != nil {
+		return "", nil, err
+	}
+	match, err := argon2id.ComparePasswordAndHash(pass, user.PasswordHash)
+	if err != nil {
+		return "", nil, err
+	}
+	if !match {
+		return "", nil, fmt.Errorf("incorrect password")
+	}
+
+	eid, err := models.NewEntityID("@", user.UUID, am.serverID)
+	if err != nil {
+		return "", nil, err
+	}
+	claims, token, err := am.CreateNewToken(eid, "ABCDEF", TokenExpireTimeDuration)
+	if err != nil {
+		return "", nil, err
+	}
+
+	return token, claims, nil
+}

core/models/base_message.go

@@ -5,7 +5,7 @@ type BaseMessage struct {
 	ID          string                 `json:"id"`
 	MessageType string                 `json:"type"`
 	From        string                 `json:"from"`
-	To          []string               `json:"to"`
+	To          []string               `json:"to,omitempty"`
 	Ok          bool                   `json:"ok"`
 	Payload     map[string]interface{} `json:"payload"`
 }

core/models/protocol_error.go

@@ -1,7 +1,7 @@
 package models
 
 type ProtocolError struct {
-	ErrCode    string                 `json:"code"`
+	ErrCode    string                 `structs:"code"`
-	ErrText    string                 `json:"text"`
+	ErrText    string                 `structs:"text"`
-	ErrPayload map[string]interface{} `json:"payload"`
+	ErrPayload map[string]interface{} `structs:"payload,omitempty"`
 }

core/models/user.go

@@ -0,0 +1,10 @@
+package models
+
+import "go.mongodb.org/mongo-driver/bson/primitive"
+
+type User struct {
+	ID           primitive.ObjectID `json:"-" bson:"_id"`
+	UUID         string             `json:"uuid"`
+	Username     string             `json:"username"`
+	PasswordHash string             `json:"-" bson:"passwordHash"`
+}

core/router.go

@@ -2,13 +2,14 @@ package core
 
 import (
 	"github.com/cadmium-im/zirconium-go/core/models"
+	"github.com/cadmium-im/zirconium-go/core/utils"
+	"github.com/fatih/structs"
 	"github.com/google/logger"
 )
 
 type Router struct {
-	appContext  *AppContext
+	appContext *AppContext
-	handlers    map[string][]C2SMessageHandler
+	handlers   map[string][]C2SMessageHandler
-	connections []*Session
 }
 
 type C2SMessageHandler interface {
@@ -30,10 +31,10 @@ func (r *Router) RouteMessage(origin *Session, message models.BaseMessage) {
 	if handlers != nil {
 		for _, v := range handlers {
 			if v.IsAuthorizationRequired() {
-				if len(origin.entityID) == 0 {
+				if origin.Claims == nil {
 					logger.Warningf("Connection %s isn't authorized", origin.connID)
 
-					msg := PrepareMessageUnauthorized(message, r.appContext.cfg.ServerDomains[0]) // fixme: domain
+					msg := utils.PrepareMessageUnauthorized(message, r.appContext.cfg.ServerDomains[0]) // fixme: domain
 					_ = origin.Send(msg)
 				}
 			}
@@ -45,7 +46,7 @@ func (r *Router) RouteMessage(origin *Session, message models.BaseMessage) {
 			ErrText:    "Server doesn't implement message type " + message.MessageType,
 			ErrPayload: make(map[string]interface{}),
 		}
-		errMsg := models.NewBaseMessage(message.ID, message.MessageType, r.appContext.cfg.ServerID, []string{message.From}, false, StructToMap(protocolError))
+		errMsg := models.NewBaseMessage(message.ID, message.MessageType, r.appContext.cfg.ServerID, []string{message.From}, false, structs.Map(protocolError))
 		logger.Infof("Drop message with type %s because server hasn't proper handlers", message.MessageType)
 		_ = origin.Send(errMsg)
 	}

core/session.go

@@ -6,10 +6,9 @@ import (
 )
 
 type Session struct {
-	wsConn   *websocket.Conn
+	wsConn *websocket.Conn
-	connID   string
+	connID string
-	entityID []*models.EntityID
+	Claims *JWTCustomClaims
-	deviceID *string
 }
 
 func (s *Session) Send(message models.BaseMessage) error {

core/session_manager.go

@@ -7,24 +7,23 @@ import (
 	"github.com/gorilla/websocket"
 )
 
-type ConnectionHandler struct {
+type SessionManager struct {
 	router      *Router
 	connections map[string]*Session
 }
 
-func NewConnectionHandler(r *Router) *ConnectionHandler {
+func NewSessionManager(r *Router) *SessionManager {
-	return &ConnectionHandler{
+	return &SessionManager{
 		router:      r,
 		connections: make(map[string]*Session),
 	}
 }
 
-func (ch *ConnectionHandler) HandleNewConnection(wsocket *websocket.Conn) {
+func (ch *SessionManager) HandleNewConnection(wsocket *websocket.Conn) {
-	randomUUID, _ := uuid.NewRandom()
+	randomUUID := uuid.New().String()
-	uuidStr := randomUUID.String()
 	o := &Session{
 		wsConn: wsocket,
-		connID: uuidStr,
+		connID: randomUUID,
 	}
 	ch.connections[o.connID] = o
 	go func() {

core/user_manager.go

@@ -1,6 +1,15 @@
 package core
 
-import "go.mongodb.org/mongo-driver/mongo"
+import (
+	"context"
+	"github.com/cadmium-im/zirconium-go/core/models"
+	"github.com/cadmium-im/zirconium-go/core/utils"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
 
 const (
 	UsersCollectionName = "users"
@@ -10,12 +19,52 @@ type UserManager struct {
 	usersCol *mongo.Collection
 }
 
-func NewUserManager(db *mongo.Database) *UserManager {
+func NewUserManager(db *mongo.Database) (*UserManager, error) {
 	col := db.Collection(UsersCollectionName)
 
 	um := &UserManager{
 		usersCol: col,
 	}
 
-	return um
+	err := um.initMongo()
+	if err != nil {
+		return nil, err
+	}
+
+	return um, nil
+}
+
+func (um *UserManager) initMongo() error {
+	usernameIndex := mongo.IndexModel{
+		Keys: bson.M{
+			"username": 1,
+		}, Options: options.Index().SetUnique(true),
+	}
+
+	exists, err := utils.IsCollectionExists(context.Background(), um.usersCol.Database(), um.usersCol.Name())
+	if err != nil {
+		return err
+	}
+	if exists {
+		_, err := um.usersCol.Indexes().DropAll(context.Background())
+		if err != nil {
+			return err
+		}
+	}
+
+	_, err = um.usersCol.Indexes().CreateMany(context.Background(), []mongo.IndexModel{usernameIndex})
+	return err
+}
+
+func (um *UserManager) SaveUser(user *models.User) error {
+	user.ID = primitive.NewObjectID()
+	user.UUID = uuid.New().String()
+	_, err := um.usersCol.InsertOne(context.Background(), user)
+	return err
+}
+
+func (um *UserManager) GetByUsername(username string) (*models.User, error) {
+	var user models.User
+	err := um.usersCol.FindOne(context.Background(), bson.D{{"username", username}}).Decode(&user)
+	return &user, err
 }

core/utils.go

@@ -1,50 +0,0 @@
-package core
-
-import (
-	"crypto/rand"
-	"reflect"
-
-	"github.com/cadmium-im/zirconium-go/core/models"
-)
-
-func GenRandomBytes(size int) (blk []byte, err error) {
-	blk = make([]byte, size)
-	_, err = rand.Read(blk)
-	return
-}
-
-func StructToMap(item interface{}) map[string]interface{} {
-	res := map[string]interface{}{}
-	if item == nil {
-		return res
-	}
-	v := reflect.TypeOf(item)
-	reflectValue := reflect.ValueOf(item)
-	reflectValue = reflect.Indirect(reflectValue)
-
-	if v.Kind() == reflect.Ptr {
-		v = v.Elem()
-	}
-	for i := 0; i < v.NumField(); i++ {
-		tag := v.Field(i).Tag.Get("json")
-		field := reflectValue.Field(i).Interface()
-		if tag != "" && tag != "-" {
-			if v.Field(i).Type.Kind() == reflect.Struct {
-				res[tag] = StructToMap(field)
-			} else {
-				res[tag] = field
-			}
-		}
-	}
-	return res
-}
-
-func PrepareMessageUnauthorized(msg models.BaseMessage, serverDomain string) models.BaseMessage {
-	protocolError := models.ProtocolError{
-		ErrCode:    "unauthorized",
-		ErrText:    "Unauthorized access",
-		ErrPayload: make(map[string]interface{}),
-	}
-	errMsg := models.NewBaseMessage(msg.ID, msg.MessageType, serverDomain, []string{msg.From}, false, StructToMap(protocolError))
-	return errMsg
-}

core/utils/utils.go

@@ -0,0 +1,91 @@
+package utils
+
+import (
+	"context"
+	"crypto/rand"
+	"fmt"
+	"github.com/alexedwards/argon2id"
+	"github.com/cadmium-im/zirconium-go/core/models"
+	"github.com/fatih/structs"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+)
+
+var (
+	ErrPasswordIsEmpty    = fmt.Errorf("the password is empty")
+	ErrPasswordIsTooShort = fmt.Errorf("the password is too short")
+)
+
+func GenRandomBytes(size int) (blk []byte, err error) {
+	blk = make([]byte, size)
+	_, err = rand.Read(blk)
+	return
+}
+
+func PrepareMessageUnauthorized(msg models.BaseMessage, serverDomain string) models.BaseMessage {
+	protocolError := models.ProtocolError{
+		ErrCode:    "unauthorized",
+		ErrText:    "Unauthorized access",
+		ErrPayload: make(map[string]interface{}),
+	}
+	errMsg := models.NewBaseMessage(msg.ID, msg.MessageType, serverDomain, []string{msg.From}, false, structs.Map(protocolError))
+	return errMsg
+}
+
+func PrepareMessageInternalServerError(msg models.BaseMessage, err error, serverID string) models.BaseMessage {
+	protocolError := models.ProtocolError{
+		ErrCode:    "internal-server-error",
+		ErrText:    err.Error(),
+		ErrPayload: nil,
+	}
+	var to []string
+	if msg.From != "" {
+		to = append(to, msg.From)
+	}
+	errMsg := models.NewBaseMessage(msg.ID, msg.MessageType, serverID, to, false, structs.Map(protocolError))
+	return errMsg
+}
+
+func PrepareErrorMessage(msg models.BaseMessage, errorType string, errorText string, serverID string) models.BaseMessage {
+	protocolError := models.ProtocolError{
+		ErrCode:    errorType,
+		ErrText:    errorText,
+		ErrPayload: nil,
+	}
+	var to []string
+	if msg.From != "" {
+		to = append(to, msg.From)
+	}
+	errMsg := models.NewBaseMessage(msg.ID, msg.MessageType, serverID, to, false, structs.Map(protocolError))
+	return errMsg
+}
+
+func HashPassword(password string) (string, error) {
+	return argon2id.CreateHash(password, argon2id.DefaultParams)
+}
+
+func ValidatePassword(password string) error {
+	if password == "" {
+		return ErrPasswordIsEmpty
+	}
+	if len(password) < 4 {
+		return ErrPasswordIsTooShort
+	}
+	return nil
+}
+
+func IsCollectionExists(ctx context.Context, db *mongo.Database, collectionName string) (bool, error) {
+	isExists := false
+	names, err := db.ListCollectionNames(ctx, bson.D{{"name", collectionName}})
+	if err != nil {
+		return false, err
+	}
+
+	for _, name := range names {
+		if name == collectionName {
+			isExists = true
+			break
+		}
+	}
+	return isExists, nil
+}

core/websocket_server.go

@@ -15,15 +15,15 @@ var wsUpgrader = websocket.Upgrader{
 }
 
 type WebsocketServer struct {
-	r           *mux.Router
+	r              *mux.Router
-	connHandler *ConnectionHandler
+	sessionManager *SessionManager
-	cfg         *Config
+	cfg            *Config
 }
 
-func NewWebsocketServer(cfg *Config, connHandler *ConnectionHandler) *WebsocketServer {
+func NewWebsocketServer(cfg *Config, sessionManager *SessionManager) *WebsocketServer {
 	wss := &WebsocketServer{}
 
-	wss.connHandler = connHandler
+	wss.sessionManager = sessionManager
 	wss.cfg = cfg
 	r := mux.NewRouter()
 	wss.r = r
@@ -36,7 +36,7 @@ func NewWebsocketServer(cfg *Config, connHandler *ConnectionHandler) *WebsocketS
 			logger.Errorf(err.Error())
 			return
 		}
-		wss.connHandler.HandleNewConnection(ws)
+		wss.sessionManager.HandleNewConnection(ws)
 	})
 
 	return wss

go.mod

@@ -3,12 +3,14 @@ module github.com/cadmium-im/zirconium-go
 go 1.13
 
 require (
-	github.com/BurntSushi/toml v0.3.1
+	github.com/alexedwards/argon2id v0.0.0-20210326052512-e2135f7c9c77 // indirect
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
+	github.com/fatih/structs v1.1.0 // indirect
 	github.com/google/logger v1.0.1
 	github.com/google/uuid v1.1.1
 	github.com/gorilla/mux v1.7.3
 	github.com/gorilla/websocket v1.4.1
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
 	github.com/pelletier/go-toml v1.7.0
 	go.mongodb.org/mongo-driver v1.5.1
 )

go.sum

@@ -1,5 +1,7 @@
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/alexedwards/argon2id v0.0.0-20210326052512-e2135f7c9c77 h1:X6U+/fhTYeDYS3sN4xHcoORJhhar+zSgrNeraapuRK4=
+github.com/alexedwards/argon2id v0.0.0-20210326052512-e2135f7c9c77/go.mod h1:Kmn5t2Rb93Q4NTprN4+CCgARGvigKMJyxP0WckpTUp0=
 github.com/aws/aws-sdk-go v1.34.28 h1:sscPpn/Ns3i0F4HPEWAVcwdIRaZZCuL7llJ2/60yPIk=
 github.com/aws/aws-sdk-go v1.34.28/go.mod h1:H7NKnBqNVzoTJpGfLrQkkD+ytBA93eiDYi/+8rV9s48=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -7,6 +9,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
+github.com/fatih/structs v1.1.0 h1:Q7juDM0QtcnhCpeyLGQKyg4TOIghuNXrkL32pHAUMxo=
+github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0 h1:5SgMzNM5HxrEjV0ww2lTmX6E2Izsfxas4+YHWRs3Lsk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
@@ -65,6 +69,8 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/markbates/oncer v0.0.0-20181203154359-bf2de49a0be2/go.mod h1:Ld9puTsIW75CHf65OeIOkyKbteujpZVXDpWK6YGZbxE=
 github.com/markbates/safe v1.0.1/go.mod h1:nAqgmRi7cY2nqMc92/bSEeQA+R4OheNU2T1kNSCBdG0=
+github.com/mitchellh/mapstructure v1.4.1 h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=
+github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe/go.mod h1:wL8QJuTMNUDYhXwkmfOly8iTdp5TEcJFWZD2D7SIkUc=
 github.com/pelletier/go-toml v1.7.0 h1:7utD74fnzVc/cpcyy8sjrlFr5vYpypUixARcHIMIGuI=
 github.com/pelletier/go-toml v1.7.0/go.mod h1:vwGMzjaWMwyfHwgIBhI2YUM4fB6nL6lVAvS1LBMMhTE=
@@ -105,6 +111,8 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190422162423-af44ce270edf/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073 h1:xMPOj6Pz6UipU1wXLkrtqpHbR0AVFnyPEQq/wRWz9lM=
 golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad h1:DN0cp81fZ3njFcrLCytUHRSUkqBjfTo4Tx9RJTWs0EY=
+golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
@@ -122,6 +130,9 @@ golang.org/x/sys v0.0.0-20190419153524-e8e3143a4f4a/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2 h1:T5DasATyLQfmbTpfEXx/IOL9vfjzW6up+ZDkmHvIf2s=
 golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=