+extern X509V3_EXT_METHOD v3_bcons, v3_nscert, v3_key_usage, v3_ext_ku;
+extern X509V3_EXT_METHOD v3_pkey_usage_period;
+extern X509V3_EXT_METHOD v3_ns_ia5_list[], v3_alt[], v3_skey_id, v3_akey_id;
+
+extern X509V3_EXT_METHOD v3_crl_num, v3_crl_reason;
+