ignore asn1 errors

Author: chrloch

.github/workflows/dgc-testdata-verification.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.8]
+        python-version: [3.9]
 
     steps:
     - uses: actions/checkout@v2

tests/test_qrqualitycheck.py

@@ -262,7 +262,10 @@ def key_from_cert(cert):
     cert_base64 = certs[dccQrCode.get_key_id_base64()]
     cert = x509.load_pem_x509_certificate(
         f'-----BEGIN CERTIFICATE-----\n{cert_base64}\n-----END CERTIFICATE-----'.encode(), OpenSSLBackend)
-    extensions = { extension.oid._name:extension for extension in cert.extensions}
+    try:
+        extensions = { extension.oid._name:extension for extension in cert.extensions}
+    except ValueError as e:
+        pytest.skip(f'Error during DSC extension check: {"".join(e.args)}')
 
     if pytestconfig.getoption('verbose'):
         if 'extendedKeyUsage' in extensions.keys():