removed 'internal' directory

auth/credentials.go

@@ -0,0 +1,19 @@
+package auth
+
+import (
+	"errors"
+
+	"github.com/Bronku/iroon/crypto"
+)
+
+func (a *Authenticator) verifyCredentials(login, password string) error {
+	user, ok := a.s.GetUser(login)
+	if !ok {
+		return errors.New("user with this login doesn't exist")
+	}
+	hash := crypto.PasswordHash(password, user.Salt)
+	if hash == user.Password {
+		return nil
+	}
+	return errors.New("wrong credentials")
+}