int ptls_load_bio_certificates (ptls_context_t * ctx, BIO * bio);
-void load_bio_certificate_chain (ptls_context_t * ctx, const char *cert_data);
+int load_bio_certificate_chain (ptls_context_t * ctx, const char *cert_data);
-void load_bio_private_key (ptls_context_t * ctx, const char *pk_data);
+int load_bio_private_key (ptls_context_t * ctx, const char *pk_data);
#endif /* __included_quic_certs_h__ */