ssl.diff

diff --git a/ext/openssl/ossl_ssl.c b/ext/openssl/ossl_ssl.c
index 4496d46..89a0ab1 100644
--- a/ext/openssl/ossl_ssl.c
+++ b/ext/openssl/ossl_ssl.c
@@ -660,6 +660,21 @@ ssl_info_cb(const SSL *ssl, int where, int val)
     }
 }
 
+static VALUE ossl_sslctx_set_tmp_ecdh(VALUE self, VALUE ecdh)
+{
+    SSL_CTX *ctx;
+    EC_KEY *_ecdh;
+    EVP_PKEY *pkey;
+
+    GetSSLCTX(self, ctx);
+    GetPKey(ecdh, pkey);
+    _ecdh = pkey->pkey.ec;
+
+    SSL_CTX_set_tmp_ecdh(ctx, _ecdh);
+
+    return Qnil;
+}
+
 /*
  * call-seq:
  *    ctx.setup => Qtrue # first time
@@ -2224,6 +2239,7 @@ Init_ossl_ssl(void)
     rb_define_method(cSSLContext, "session_cache_size=",     ossl_sslctx_set_session_cache_size, 1);
     rb_define_method(cSSLContext, "session_cache_stats",     ossl_sslctx_get_session_cache_stats, 0);
     rb_define_method(cSSLContext, "flush_sessions",     ossl_sslctx_flush_sessions, -1);
+    rb_define_method(cSSLContext, "tmp_ecdh=",     ossl_sslctx_set_tmp_ecdh, 1);
 
     ary = rb_ary_new2(numberof(ossl_ssl_method_tab));
     for (i = 0; i < numberof(ossl_ssl_method_tab); i++) {