Added password generation and hashing helper

main.go

@@ -28,15 +28,48 @@ package main
 import (
 	"context"
 	"flag"
+	"fmt"
+	pwgen "github.com/sethvargo/go-password/password"
+	"golang.org/x/crypto/bcrypt"
 	"golang.org/x/net/webdav"
+	"math/rand"
 	"net/http"
+	"time"
 )
 
 var configFile = flag.String("config", "sharedav.toml", "Config file to be used.")
+var genPassword = flag.Bool("genpass", false, "If set, a password will be generated and hashed.")
+var hashPassword = flag.String("hashpass", "", "If set, the given password will be hashed.")
 
 func main() {
 	flag.Parse()
 
+	if *genPassword {
+		// math.rand is not secure. For determining the number of digits in a password
+		// it should suffice, though.
+		rand.Seed(time.Now().UnixNano())
+		pwLen := 32
+		pw, err := pwgen.Generate(pwLen, rand.Intn(pwLen/2), 0, false, true)
+		if err != nil {
+			panic(err)
+		}
+		hash, err := bcrypt.GenerateFromPassword([]byte(pw), 0)
+		if err != nil {
+			panic(err)
+		}
+
+		fmt.Printf("Password: %s\n", pw)
+		fmt.Printf("    Hash: %s\n", hash)
+		return
+	} else if *hashPassword != "" {
+		hash, err := bcrypt.GenerateFromPassword([]byte(*hashPassword), 0)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(string(hash))
+		return
+	}
+
 	c := LoadConfig(*configFile)
 
 	h := &webdav.Handler{}