17289 add password validation

netbox/utilities/password_validation.py

@@ -0,0 +1,27 @@
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext as _
+
+
+class NumericAlphaPasswordValidator:
+    """
+    Validate that the password has at least one numeral, one uppercase letter and one lowercase letter.
+    """
+
+    def validate(self, password, user=None):
+        if not any(char.isdigit() for char in password):
+            raise ValidationError(
+                _("Password should have at least one numeral"),
+            )
+
+        if not any(char.isupper() for char in password):
+            raise ValidationError(
+                _("Password should have at least one uppercase letter"),
+            )
+
+        if not any(char.islower() for char in password):
+            raise ValidationError(
+                _("Password should have at least one lowercase letter"),
+            )
+
+    def get_help_text(self):
+        return _("Your password must contain at least one numeral, one uppercase letter and one lowercase letter.")