X-Git-Url: http://www.git.cypherpunks.ru/?p=gocheese.git;a=blobdiff_plain;f=passwd.go;h=f6760d2910091bdcbefc301d2d85f29ae471512e;hp=29419564ce9c22b3fb4ceab0f0d0cb7e8658edee;hb=4b49f65744b823da2903583ab348167a1e2756ac;hpb=58cc9588d92ab293d301e7267851bd9c4167e508

diff --git a/passwd.go b/passwd.go
index 2941956..f6760d2 100644
--- a/passwd.go
+++ b/passwd.go
@@ -19,30 +19,65 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
+	"errors"
 	"io/ioutil"
 	"log"
+	"os"
 	"strings"
 )
 
+var passwords map[string]Auther = make(map[string]Auther)
+
+type Auther interface {
+	Auth(password string) bool
+}
+
+func strToAuther(verifier string) (string, Auther, error) {
+	st := strings.SplitN(verifier, "$", 3)
+	if len(st) != 3 || st[0] != "" {
+		return "", nil, errors.New("invalid verifier structure")
+	}
+	algorithm := st[1]
+	var auther Auther
+	var err error
+	switch algorithm {
+	case "argon2i":
+		auther, err = parseArgon2i(st[2])
+	case "sha256":
+		auther, err = parseSHA256(st[2])
+	default:
+		err = errors.New("unknown hashing algorithm")
+	}
+	return algorithm, auther, err
+}
+
 func refreshPasswd() {
 	passwd, err := ioutil.ReadFile(*passwdPath)
+	if os.IsNotExist(err) {
+		return
+	}
 	if err != nil {
 		log.Fatal(err)
 	}
+	passwordsNew := make(map[string]Auther)
 	for i, credentials := range strings.Split(strings.TrimRight(string(passwd), "\n"), "\n") {
+		if len(credentials) == 0 || strings.HasPrefix(credentials, "#") {
+			continue
+		}
 		splitted := strings.Split(credentials, ":")
 		if len(splitted) != 2 {
 			log.Fatalf("%s:%d: Wrong login:password format", *passwdPath, i)
 		}
 		login := splitted[0]
-		if _, exists := passwords[login]; exists {
+		if _, exists := passwordsNew[login]; exists {
 			log.Fatalf("%s:%d: %s: already exists", *passwdPath, i, login)
 		}
 		_, auther, err := strToAuther(splitted[1])
 		if err != nil {
 			log.Fatalf("%s:%d: %s: %s", *passwdPath, i, login, err)
 		}
-		passwords[login] = auther
+		passwordsNew[login] = auther
 		log.Println("Added password for " + login)
 	}
+	passwords = passwordsNew
 }