Split pretty huge gocheese.go

[gocheese.git] / passwd.go

diff --git a/passwd.go b/passwd.go
index 29419564ce9c22b3fb4ceab0f0d0cb7e8658edee..f6760d2910091bdcbefc301d2d85f29ae471512e 100644 (file)
--- 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
 }