1 files changed, 10 insertions, 0 deletions
diff --git a/ext/openssl/ossl_pkey.h b/ext/openssl/ossl_pkey.h
index 5e3329d326..fa426a584e 100644
--- a/ext/openssl/ossl_pkey.h
+++ b/ext/openssl/ossl_pkey.h
@@ -39,6 +39,16 @@ extern ID id_private_q;
 } while (0)
 
 void ossl_generate_cb(int, int, void *);
+#define HAVE_BN_GENCB defined(HAVE_RSA_GENERATE_KEY_EX) || defined(HAVE_DH_GENERATE_PARAMETERS_EX) || defined(HAVE_DSA_GENERATE_PARAMETERS_EX)
+#if HAVE_BN_GENCB
+struct ossl_generate_cb_arg {
+    int yield;
+    int stop;
+    int state;
+}; 
+int ossl_generate_cb_2(int p, int n, BN_GENCB *cb);
+void ossl_generate_cb_stop(void *ptr);
+#endif
 
 VALUE ossl_pkey_new(EVP_PKEY *);
 VALUE ossl_pkey_new_from_file(VALUE);