RFC 7468 allows a larger character set in PEM label

Author: space88man

asn1crypto/pem.py

@@ -14,6 +14,7 @@
 import base64
 import re
 import sys
+import string
 
 from ._errors import unwrap
 from ._types import type_name as _type_name, str_cls, byte_cls
@@ -150,8 +151,8 @@ def _unarmor(pem_bytes):
 
         if state == "trash":
             # Look for a starting line since some CA cert bundle show the cert
-            # into in a parsed format above each PEM block
-            type_name_match = re.match(b'^(?:---- |-----)BEGIN ([A-Z0-9 ]+)(?: ----|-----)', line)
+            # info in a parsed format above each PEM block
+            type_name_match = re.match(br'''^(?:---- |-----)BEGIN ([0-9a-zA-Z!"#$%&'()*+,./:;<=>?@\\[\]^_`{|}~ ]+)(?: ----|-----)''', line)
             if not type_name_match:
                 continue
             object_type = type_name_match.group(1).decode('ascii')