From e093f2a2eb10ade43f9274dc88b3f36c9ebbdc7c Mon Sep 17 00:00:00 2001
From: ritesh006 <ritesh.kumar0793@gmail.com>
Date: Wed, 27 Aug 2025 11:24:22 +0530
Subject: [PATCH] fix: raise ValueError instead of TypeError in
 issuer_or_subject_length (#30)

Corrected the check when all issuer/subject fields are empty.
Previously raised TypeError (misleading), now raises ValueError.
Fixes #30.
---
 adafruit_atecc/adafruit_atecc_asn1.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/adafruit_atecc/adafruit_atecc_asn1.py b/adafruit_atecc/adafruit_atecc_asn1.py
index 14b584c..d713c0e 100755
--- a/adafruit_atecc/adafruit_atecc_asn1.py
+++ b/adafruit_atecc/adafruit_atecc_asn1.py
@@ -268,6 +268,6 @@ def issuer_or_subject_length(
         tot_len += 11 + len(org_unit)
     if common:
         tot_len += 11 + len(common)
-    else:
-        raise TypeError("Provided length must be > 0")
+    if tot_len == 0:
+        raise TypeError("issuer_or_subject_length cannot be zero")
     return tot_len