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serve.go
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serve.go
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package users
import (
"errors"
fmt "fmt"
"log"
"net"
"regexp"
"sync"
"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
"github.com/gogo/protobuf/types"
emails "github.com/tcfw/evntsrc/internal/emails/protos"
"github.com/tcfw/evntsrc/internal/tracing"
"github.com/tcfw/evntsrc/internal/users/events"
protos "github.com/tcfw/evntsrc/internal/users/protos"
utils "github.com/tcfw/evntsrc/internal/utils/authorization"
"github.com/tcfw/evntsrc/internal/utils/db"
"github.com/tcfw/evntsrc/internal/utils/sysevents"
"golang.org/x/crypto/bcrypt"
context "golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/balancer/roundrobin"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const (
dbName = "users"
dbCollection = "users"
mdValidationtoken = "validation_token"
)
type server struct {
mu sync.Mutex // protects routeNotes
emails emails.EmailServiceClient
emailsConn *grpc.ClientConn
}
//server creates a ne struct to interface the auth server
func newServer() *server {
svr := &server{}
emailsConn, err := grpc.Dial("dns:///emails:443", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
if err != nil {
panic(err)
}
svr.emailsConn = emailsConn
svr.emails = emails.NewEmailServiceClient(emailsConn)
go svr.listenLoop()
return svr
}
//Create takes in a request and creates a new user
func (s *server) Create(ctx context.Context, request *protos.User) (*protos.User, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return nil, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
if err := s.validateUserRequest(request, true); err != nil {
return nil, err
}
password, err := validatePassword(request.Password)
if err != nil {
return nil, err
}
id := bson.NewObjectId().Hex()
request.CreatedAt = types.TimestampNow()
request.Password = *password
request.Id = id
//Clear anything that was sent in reqest
request.Metadata = map[string][]byte{
mdValidationtoken: []byte(genValidationToken()),
}
request.Mfa = nil
request.Status = protos.User_PENDING
//check user already exists
if existingUser, err := s.Find(ctx, &protos.UserRequest{Status: protos.UserRequest_ANY, Query: &protos.UserRequest_Email{Email: request.Email}}); err == nil {
sysevents.BroadcastEvent(ctx, &events.Event{Event: &sysevents.Event{Type: events.BroadcastTypeRecreation}, UserID: existingUser.Id})
if err := s.sendRecreationEmail(ctx, existingUser); err != nil {
log.Printf("Failed to send recreation email: %s", err)
return nil, err
}
//Return with request to avoid account enumeration
request.Metadata = map[string][]byte{}
return s.sanatiseUserForResponse(request), nil
}
if err = collection.Insert(request); err != nil {
return nil, err
}
//Validate insert
q := collection.FindId(id)
if c, _ := q.Count(); c == 0 {
return nil, fmt.Errorf("Failed to insert new user with id %s", id)
}
user := protos.User{}
q.One(&user)
sysevents.BroadcastEvent(ctx, &events.Event{Event: &sysevents.Event{Type: events.BroadcastTypeCreated}, UserID: id})
if err := s.sendValidationEmail(ctx, &user); err != nil {
log.Printf("Failed to send validation email: %s", err)
return nil, err
}
user.Metadata = map[string][]byte{}
return s.sanatiseUserForResponse(&user), nil
}
//sanatiseUserForResponse removes sensitive information from the user struct
//before sending back as response
func (s *server) sanatiseUserForResponse(user *protos.User) *protos.User {
user.Password = ""
return user
}
//validateUserRequest checks various fields in request
func (s *server) validateUserRequest(request *protos.User, checkPassword bool) error {
if request.Name == "" {
return fmt.Errorf("Name is required")
}
if request.Email == "" {
return fmt.Errorf("Email is required")
}
if checkPassword {
if request.Password == "" {
return fmt.Errorf("Password is required")
}
//Positive lookaheads currently not supported in regexp
// reg, err := regexp.Compile(`(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#$%&*()_]).{8,}`)
// if err != nil {
// return err
// }
// if !reg.Match([]byte(request.Password)) {
// return fmt.Errorf("Password not complex enough")
// }
}
//picture should not be larger than 5MB
if len(request.Picture) > 5*1<<20 {
return fmt.Errorf("Picture too large - 5MB limit")
}
return nil
}
func (s *server) ValidateAccount(ctx context.Context, request *protos.ValidateRequest) (*protos.Empty, error) {
notFound := fmt.Errorf("Unable to find matching token")
user, err := s.Find(ctx, &protos.UserRequest{Status: protos.UserRequest_PENDING, Query: &protos.UserRequest_Email{Email: request.Email}})
if err != nil {
return nil, notFound
}
token, ok := user.Metadata[mdValidationtoken]
if !ok {
return nil, notFound
}
if string(token) == request.Token {
user.Status = protos.User_ACTIVE
delete(user.Metadata, mdValidationtoken)
} else {
return nil, notFound
}
err = s.updateUser(user)
return &protos.Empty{}, err
}
//Delete deletes a user
func (s *server) Delete(ctx context.Context, request *protos.UserRequest) (*protos.Empty, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return &protos.Empty{}, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
user, err := s.Find(ctx, request)
if err != nil {
return &protos.Empty{}, err
}
switch reqType := request.Query.(type) {
case *protos.UserRequest_Id:
err = collection.RemoveId(user.Id)
case *protos.UserRequest_Email:
err = collection.Remove(bson.M{"email": user.Email})
default:
return &protos.Empty{}, fmt.Errorf("Unknown query type: %s", reqType)
}
if err == nil {
sysevents.BroadcastEvent(ctx, &events.Event{Event: &sysevents.Event{Type: events.BroadcastTypeDeleted}, UserID: user.Id})
}
return &protos.Empty{}, err
}
//Get finds a user
func (s *server) Get(ctx context.Context, request *protos.UserRequest) (*protos.User, error) {
user, err := s.Find(ctx, &protos.UserRequest{Query: &protos.UserRequest_Id{Id: request.GetId()}})
if err != nil {
return nil, err
}
return user, nil
}
//Find queries for a user based on email or id depending on the id
func (s *server) Find(ctx context.Context, request *protos.UserRequest) (*protos.User, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return nil, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
var query *mgo.Query
qBsonM := bson.M{}
switch reqType := request.Query.(type) {
case *protos.UserRequest_Id:
qBsonM["_id"] = request.GetId()
case *protos.UserRequest_Email:
qBsonM["email"] = request.GetEmail()
default:
return nil, fmt.Errorf("Unknown query type: %s", reqType)
}
switch request.Status {
default:
case protos.UserRequest_ACTIVE:
qBsonM["status"] = protos.User_ACTIVE
break
case protos.UserRequest_DELETED:
qBsonM["status"] = protos.User_DELETED
break
case protos.UserRequest_PENDING:
qBsonM["status"] = protos.User_PENDING
break
case protos.UserRequest_ANY:
//don't filter
break
}
query = collection.Find(qBsonM)
if c, _ := query.Count(); c == 0 {
log.Printf("No users found for query: %v", request)
return nil, fmt.Errorf("Failed to find user")
}
user := protos.User{}
query.One(&user)
tracing.ActiveSpan(ctx).LogKV("user_id", user.Id)
//Cannot sanatise output as password is required for passport svr
return &user, nil
}
//FindUsers finds multiple users
func (s *server) FindUsers(request *protos.UserRequest, stream protos.UserService_FindUsersServer) error {
//TODO(tcfw) is this different to List now?
return nil
}
//List creates a list of all users in the DB
func (s *server) List(ctx context.Context, request *protos.Empty) (*protos.UserList, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return nil, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
//Find All
query := collection.Find(nil)
list := &protos.UserList{}
if err = query.All(&list.Users); err != nil {
return nil, err
}
return list, nil
}
//SetPassword changes the users password
func (s *server) SetPassword(ctx context.Context, request *protos.PasswordUpdateRequest) (*protos.Empty, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return nil, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
claims, err := utils.TokenClaimsFromContext(ctx)
if err != nil {
return nil, err
}
if request.Id == "" {
request.Id = claims["sub"].(string)
} else if _, ok := claims["admin"]; request.Id != claims["sub"].(string) && !ok {
return nil, status.Errorf(codes.PermissionDenied, "Unauthorized")
}
query := collection.FindId(request.Id)
if c, err := query.Count(); c == 0 || err != nil {
return nil, fmt.Errorf("Failed to find user %s: %v", request.Id, err)
}
user := &protos.User{}
if err = query.One(user); err != nil {
return nil, err
}
if err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(request.GetCurrentPassword())); err != nil {
return nil, errors.New("Current password doesn't match")
}
password, _ := validatePassword(request.Password)
collection.UpdateId(user.Id, bson.M{"$set": bson.M{"password": password}})
return nil, err
}
//validatePassword checks for password complexity
func validatePassword(password string) (*string, error) {
if password == "" {
return &password, nil
}
regex, err := regexp.Compile("^\\$2[aby]?\\$\\d{1,2}\\$[.\\/A-Za-z0-9]{53}$")
if err != nil {
return nil, err
}
if regex.Match([]byte(password)) {
return &password, nil
}
hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
return nil, err
}
stringHash := string(hash)
return &stringHash, nil
}
//Update updates a users details given they exist
func (s *server) Update(ctx context.Context, request *protos.UserUpdateRequest) (*protos.User, error) {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return nil, err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
claims, err := utils.TokenClaimsFromContext(ctx)
if err != nil {
return nil, err
}
if err := s.validateUserRequest(request.User, false); err != nil {
return nil, err
}
if request.Id == "" {
request.Id = claims["sub"].(string)
}
if _, ok := claims["admin"]; request.Id != claims["sub"].(string) && !ok {
return nil, status.Errorf(codes.PermissionDenied, "Unauthorized")
}
query := collection.FindId(request.Id)
if c, err := query.Count(); c == 0 || err != nil {
return nil, fmt.Errorf("Failed to find user %s: %v", request.Id, err)
}
if _, ok := claims["admin"]; request.Replace == true && ok {
request.User.Id = request.Id
err = collection.UpdateId(request.Id, request.User)
if err != nil {
return nil, err
}
} else {
user := &protos.User{}
if err = query.One(user); err != nil {
return nil, err
}
user.Name = request.User.Name
user.Email = request.User.Email
user.Company = request.User.Company
for k, v := range request.User.GetMetadata() {
user.Metadata[k] = v
}
if err = collection.UpdateId(request.Id, user); err != nil {
return nil, err
}
}
sysevents.BroadcastEvent(ctx, &events.Event{Event: &sysevents.Event{Type: events.BroadcastTypeUpdated}, UserID: request.User.Id})
return s.Get(ctx, &protos.UserRequest{Query: &protos.UserRequest_Id{Id: request.GetId()}})
}
func (s *server) updateUser(user *protos.User) error {
dbConn, err := db.NewMongoDBSession()
if err != nil {
return err
}
defer dbConn.Close()
collection := dbConn.DB(dbName).C(dbCollection)
query := collection.FindId(user.Id)
if c, err := query.Count(); c == 0 || err != nil {
return fmt.Errorf("Failed to find user %s: %v", user.Id, err)
}
//restore password
origUser := &protos.User{}
query.One(origUser)
user.Password = origUser.Password
return collection.UpdateId(user.Id, user)
}
//Me returns the user information based on the uid from a gwt token provided in the authorization metadata
func (s *server) Me(ctx context.Context, request *protos.Empty) (*protos.User, error) {
claims, err := utils.TokenClaimsFromContext(ctx)
if err != nil {
return nil, err
}
user, err := s.Find(ctx, &protos.UserRequest{Query: &protos.UserRequest_Id{Id: claims["sub"].(string)}})
if err != nil {
return nil, err
}
return s.sanatiseUserForResponse(user), nil
}
//RunGRPC starts the GRPC server
func RunGRPC(port int) {
lis, err := net.Listen("tcp", fmt.Sprintf(":%v", port))
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
tracing.InitGlobalTracer("Users")
grpcServer := grpc.NewServer(tracing.GRPCServerOptions()...)
protos.RegisterUserServiceServer(grpcServer, newServer())
log.Printf("Starting gRPC server (port %v)", port)
grpcServer.Serve(lis)
}