- Added extra X509 regression and coverage tests

diff --git a/tests/data_files/crl_sha512.pem b/tests/data_files/crl_sha512.pem
new file mode 100644
index 0000000..5f1a2f6
--- /dev/null
+++ b/tests/data_files/crl_sha512.pem
@@ -0,0 +1,11 @@
+-----BEGIN X509 CRL-----
+MIIBqzCBlDANBgkqhkiG9w0BAQ0FADA7MQswCQYDVQQGEwJOTDERMA8GA1UEChMI
+UG9sYXJTU0wxGTAXBgNVBAMTEFBvbGFyU1NMIFRlc3QgQ0EXDTA5MDcxOTE5NTYz
+N1oXDTA5MDkxNzE5NTYzN1owKDASAgEBFw0wOTAyMDkyMTEyMzZaMBICAQMXDTA5
+MDIwOTIxMTIzNlowDQYJKoZIhvcNAQENBQADggEBABDNSzzunnzHZspQ5zDy8TCR
+BydIUTJVLc7hhI9sQbWsSMR0hlgspkalFFTteFXyOPv1V1tbksHB5Tj8vbKgXYlg
+Q6/KdeAC21/ZgabAmwz333dctbtwE6y94cw8AyM/TettNx0PnUKrUvPMuLzt595g
+DwPwV4ZLUeVdYEtrZU7ZOcCpteWl0GkAEhfySwv+HPUkWRs3ZaRueE8RdYJYK0Sz
+PgSgu3o++v9ETZJzMBXkEo/LLZ07OmiT8fFPK2gieUp0cWA8nzjjL3TutPfUtA2R
+fjuAjUmskx5U9peLDm0BjF0F9pd5+Tsibh0C0z79gPu6C6w799sEvIm/XaQX2es=
+-----END X509 CRL-----