extern X509V3_EXT_METHOD v3_pkey_usage_period, v3_sxnet, v3_info, v3_sinfo;
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, v3_crl_invdate;
extern X509V3_EXT_METHOD v3_pkey_usage_period, v3_sxnet, v3_info, v3_sinfo;
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, v3_crl_invdate;