/
login.go
93 lines (76 loc) · 2.19 KB
/
login.go
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// Copyright 2016 Google, Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"crypto/rsa"
"fmt"
"io/ioutil"
"time"
"database/sql"
pb "github.com/kelseyhightower/grpc-hello-service/auth"
jwt "github.com/dgrijalva/jwt-go"
"golang.org/x/crypto/bcrypt"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"github.com/golang/protobuf/proto"
)
type authServer struct {
jwtPrivatekey *rsa.PrivateKey
}
func NewAuthServer(rsaPrivateKey string) (*authServer, error) {
key, err := ioutil.ReadFile(rsaPrivateKey)
if err != nil {
return nil, fmt.Errorf("Error reading the jwt private key: %s", err)
}
parsedKey, err := jwt.ParseRSAPrivateKeyFromPEM(key)
if err != nil {
return nil, fmt.Errorf("Error parsing the jwt private key: %s", err)
}
return &authServer{parsedKey}, nil
}
func (as *authServer) Login(ctx context.Context, request *pb.LoginRequest) (*pb.LoginResponse, error) {
user, err := getUser(db, request.Username)
if err != nil {
return nil, err
}
err = bcrypt.CompareHashAndPassword([]byte(user.PasswordHash), []byte(request.Password))
if err != nil {
return nil, grpc.Errorf(codes.PermissionDenied, "")
}
token := jwt.New(jwt.SigningMethodRS256)
token.Claims["exp"] = time.Now().Add(time.Hour * 72).Unix()
token.Claims["admin"] = user.IsAdmin
token.Claims["iss"] = "auth.service"
token.Claims["iat"] = time.Now().Unix()
token.Claims["email"] = user.Email
token.Claims["sub"] = user.Username
tokenString, err := token.SignedString(as.jwtPrivatekey)
if err != nil {
return nil, grpc.Errorf(codes.Internal, err.Error())
}
return &pb.LoginResponse{tokenString}, nil
}
func getUser(db *sql.DB, username string) (*pb.User, error) {
user := &pb.User{}
var rawUser []byte
rows, err := db.Query("SELECT proto FROM users WHERE username=?", username)
if err != nil {
return nil, err
}
defer rows.Close()
for rows.Next() {
if err := rows.Scan(&rawUser); err != nil {
return nil, err
}
}
if err := rows.Err(); err != nil {
return nil, err
}
err = proto.Unmarshal(rawUser, user)
if err != nil {
return nil, err
}
return user, nil
}