SSL: RSA_generate_key() is deprecated in OpenSSL 1.1.0.

OpenSSL removed support for all 40 and 56 bit ciphers.

src/event/ngx_event_openssl.c

diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 9f3cc86..16ba012 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -758,7 +758,7 @@
         return NULL;
     }
 
-#ifndef OPENSSL_NO_DEPRECATED
+#if (OPENSSL_VERSION_NUMBER < 0x10100003L && !defined OPENSSL_NO_DEPRECATED)
 
     if (key == NULL) {
         key = RSA_generate_key(512, RSA_F4, NULL, NULL);

src/http/modules/ngx_http_ssl_module.c

diff --git a/src/http/modules/ngx_http_ssl_module.c b/src/http/modules/ngx_http_ssl_module.c
index 12da4f2..6a4108c 100644
--- a/src/http/modules/ngx_http_ssl_module.c
+++ b/src/http/modules/ngx_http_ssl_module.c
@@ -718,7 +718,7 @@
         SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
     }
 
-#ifndef LIBRESSL_VERSION_NUMBER
+#if (OPENSSL_VERSION_NUMBER < 0x10100001L && !defined LIBRESSL_VERSION_NUMBER)
     /* a temporary 512-bit RSA key is required for export versions of MSIE */
     SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback);
 #endif

src/mail/ngx_mail_ssl_module.c

diff --git a/src/mail/ngx_mail_ssl_module.c b/src/mail/ngx_mail_ssl_module.c
index 971085c..ff5c141 100644
--- a/src/mail/ngx_mail_ssl_module.c
+++ b/src/mail/ngx_mail_ssl_module.c
@@ -421,7 +421,7 @@
         SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
     }
 
-#ifndef LIBRESSL_VERSION_NUMBER
+#if (OPENSSL_VERSION_NUMBER < 0x10100001L && !defined LIBRESSL_VERSION_NUMBER)
     SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback);
 #endif
 

src/stream/ngx_stream_ssl_module.c

diff --git a/src/stream/ngx_stream_ssl_module.c b/src/stream/ngx_stream_ssl_module.c
index 7abd9e1..e12da1b 100644
--- a/src/stream/ngx_stream_ssl_module.c
+++ b/src/stream/ngx_stream_ssl_module.c
@@ -276,7 +276,7 @@
         SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
     }
 
-#ifndef LIBRESSL_VERSION_NUMBER
+#if (OPENSSL_VERSION_NUMBER < 0x10100001L && !defined LIBRESSL_VERSION_NUMBER)
     SSL_CTX_set_tmp_rsa_callback(conf->ssl.ctx, ngx_ssl_rsa512_key_callback);
 #endif