/
authentication.go
110 lines (95 loc) · 2.64 KB
/
authentication.go
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package services
import (
"crypto/sha256"
"encoding/csv"
"errors"
"fmt"
"log"
"net/http"
"os"
"strconv"
"strings"
"golang.org/x/crypto/pbkdf2"
)
type User struct {
User string `json:"username"`
Password string `json:"password"` // Salted
Enabled bool `json:"enabled"`
Roles []string `json:"roles"`
}
type AuthenticationArgs struct {
User string `json:"username"`
Password string `json:"password"`
}
type AuthenticationReply struct {
Token string `json:"token"`
}
type AuthenticationService int
func (t *AuthenticationService) Authenticate(r *http.Request, args *AuthenticationArgs, result *AuthenticationReply) error {
log.Printf("Authentication Authenticate Called for '%v'\n", args.User)
if val, ok := users[args.User]; ok {
//do something here TODO should look up user and get SALT etc
hash := HashPassword(args.Password, fmt.Sprintf("%v%v", args.User, args.Password)) // I know each user should have on salt which is not the user
//log.Printf("'%s' == '%s'\n", hash, val.Password)
if hash != val.Password {
return errors.New("401 Not Allowed")
}
if val.Enabled == false {
return errors.New("403 User '" + args.User + "' Disabled")
}
sessionKey, err := ApplicationSessionService.NewSession(val)
if err != nil {
return errors.New("500 " + err.Error())
}
*result = AuthenticationReply{sessionKey}
} else {
return errors.New("401 User Not Allowed")
}
return nil
}
// Initiaizes data structues - IE Read user DB
func LoadUsers(filename string) error {
csvfile, err := os.Open(filename)
if err != nil {
log.Fatal(err)
return err
}
defer csvfile.Close()
r := csv.NewReader(csvfile)
records, err := r.ReadAll()
if err != nil {
log.Fatal(err)
return err
}
log.Printf("Reading User Database %s\n", filename)
// Create user map
for index, row := range records {
if index > 0 && len(row) > 0 {
user := User{}
user.User = row[0]
user.Password = row[1]
v, _ := strconv.ParseBool(row[2])
user.Enabled = v
roles := strings.Split(row[3], ":")
user.Roles = roles
// Add
users[user.User] = user
log.Printf("\tUser %v, Enabled = %v\n", user.User, user.Enabled)
}
}
log.Printf("#Number of users = %v\n", len(users))
return nil
}
func HashPassword(password, salt string) string {
bpassword := []byte(password)
bsalt := []byte(salt)
v := pbkdf2.Key(bpassword, bsalt, 4096, sha256.Size, sha256.New)
hash := fmt.Sprintf("%x", v) // I know each user should have on salt
//log.Printf("%s -> %s\n", password, hash)
return hash
}
// Get version
func (t *AuthenticationService) Version(r *http.Request, args *string, result *string) error {
*result = Version
return nil
}