Update update_secret database field length for salted hash

src/nsupdate/main/migrations/0013_alter_host_update_secret.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.1.5 on 2023-03-07 16:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("main", "0012_auto_20191230_1729"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="host",
+            name="update_secret",
+            field=models.CharField(max_length=128, verbose_name="update secret"),
+        ),
+    ]

src/nsupdate/main/models.py

@@ -165,7 +165,7 @@ class Host(models.Model):
     domain = models.ForeignKey(Domain, on_delete=models.CASCADE, verbose_name=_("domain"))
     update_secret = models.CharField(
         _("update secret"),
-        max_length=64,  # secret gets hashed (on save) to salted sha1, 58 bytes str len
+        max_length=128,  # secret gets hashed (on save) to salted sha1, "sha1" + "$" + 22 chars salt + "$" + 40 chars sha1 = 68 chars
     )
     comment = models.CharField(
         _("comment"),