authentication tool #4277
Description
Describe the feature you would like to see
// use -> ./passgen --username=john.doe --email=[email protected] --name="John Doe" --password=123"
// or with --file (optimal) -> ./passgen --username=john.doe --email=[email protected] --name="John Doe" --password=123" --file users.yml
package main
import (
"flag"
"fmt"
"os"
"golang.org/x/crypto/bcrypt"
"gopkg.in/yaml.v3"
)
type User struct {
Email string yaml:"email"
Name string yaml:"name"
Password string yaml:"password"
}
type UsersFile struct {
Users map[string]User yaml:"users"
}
func main() {
// Command-line arguments
file := flag.String("file", "users.yml", "Path to the users YAML file (optional)")
username := flag.String("username", "", "Username (key name in users.yml)")
email := flag.String("email", "", "User email")
name := flag.String("name", "", "User full name")
password := flag.String("password", "", "User password (plaintext, will be hashed with bcrypt)")
flag.Parse()
// Required fields validation
if *username == "" || *email == "" || *name == "" || *password == "" {
fmt.Println("Error: --username, --email, --name and --password are all required.")
fmt.Println("Optional: --file=path/to/users.yml")
return
}
filename := *file
// Load existing file if it exists
var usersFile UsersFile
if data, err := os.ReadFile(filename); err == nil {
if err := yaml.Unmarshal(data, &usersFile); err != nil {
fmt.Println("Error parsing YAML file:", err)
return
}
}
// Ensure map is initialized
if usersFile.Users == nil {
usersFile.Users = make(map[string]User)
}
// Generate bcrypt hash
hashedPassword, err := bcrypt.GenerateFromPassword([]byte(*password), bcrypt.DefaultCost)
if err != nil {
fmt.Println("Error generating bcrypt hash:", err)
return
}
// Create the new user entry
newUser := User{
Email: *email,
Name: *name,
Password: string(hashedPassword),
}
// Add or update the user
usersFile.Users[*username] = newUser
// Convert struct back to YAML
out, err := yaml.Marshal(&usersFile)
if err != nil {
fmt.Println("Error writing YAML:", err)
return
}
// Save file
if err := os.WriteFile(filename, out, 0644); err != nil {
fmt.Println("Error saving file:", err)
return
}
fmt.Printf("User '%s' added or updated successfully in %s!\n", *username, filename)
}
Describe how you would like to see this feature implemented
No response
Describe any alternatives you've considered
I wrote this small utility in Go so that you can generate access for multiple users while maintaining the existing ones in users.yml. I hope it helps with your project! Good luck and success.