+typedef struct crypto_ex_data_st CRYPTO_EX_DATA;
+/* Callback types for crypto.h */
+typedef int CRYPTO_EX_new(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
+ int idx, long argl, void *argp);
+typedef void CRYPTO_EX_free(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
+ int idx, long argl, void *argp);
+typedef int CRYPTO_EX_dup(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from, void *from_d,
+ int idx, long argl, void *argp);
+
+typedef struct ocsp_req_ctx_st OCSP_REQ_CTX;
+typedef struct ocsp_response_st OCSP_RESPONSE;
+typedef struct ocsp_responder_id_st OCSP_RESPID;
+