* Ensure that we set the default DH parameters for the key

Replace else with an if as the if branch no longer ensures that
custome DH parameters have been loaded.
This fixes a regression that causes the default DH parameters for a key
no longer set and thus effectively disabling DH ciphers when no explicit
DH parameters are set.

PR: 68863

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1916863 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/changes-entries/pr68863.txt b/changes-entries/pr68863.txt
new file mode 100644 (file)
index 0000000..d45ffc7
--- /dev/null
+++ b/changes-entries/pr68863.txt
@@ -0,0 +1,3 @@
+  *) mod_ssl: Fix a regression that causes the default DH parameters for a key
+     no longer set and thus effectively disabling DH ciphers when no explicit
+     DH parameters are set. PR 68863 [Ruediger Pluem]

diff --git a/modules/ssl/ssl_engine_init.c b/modules/ssl/ssl_engine_init.c
index 64e4aaf1dcdda54fe0d770c294d3ddc495c1b9c5..f657026d137e00870582fabf06b466bd9c2bff77 100644 (file)
--- a/modules/ssl/ssl_engine_init.c
+++ b/modules/ssl/ssl_engine_init.c
@@ -1416,6 +1416,7 @@ static apr_status_t ssl_init_server_certs(server_rec *s,
     const char *vhost_id = mctx->sc->vhost_id, *key_id, *certfile, *keyfile;
     int i;
     EVP_PKEY *pkey;
+    int custom_dh_done = 0;
 #ifdef HAVE_ECC
     EC_GROUP *ecgroup = NULL;
     int curve_nid = 0;
@@ -1591,14 +1592,14 @@ static apr_status_t ssl_init_server_certs(server_rec *s,
      */
     certfile = APR_ARRAY_IDX(mctx->pks->cert_files, 0, const char *);
     if (certfile && !modssl_is_engine_id(certfile)) {
-        int done = 0, num_bits = 0;
+        int num_bits = 0;
 #if OPENSSL_VERSION_NUMBER < 0x30000000L
         DH *dh = modssl_dh_from_file(certfile);
         if (dh) {
             num_bits = DH_bits(dh);
             SSL_CTX_set_tmp_dh(mctx->ssl_ctx, dh);
             DH_free(dh);
-            done = 1;
+            custom_dh_done = 1;
         }
 #else
         pkey = modssl_dh_pkey_from_file(certfile);
@@ -1608,18 +1609,18 @@ static apr_status_t ssl_init_server_certs(server_rec *s,
                 EVP_PKEY_free(pkey);
             }
             else {
-                done = 1;
+                custom_dh_done = 1;
             }
         }
 #endif
-        if (done) {
+        if (custom_dh_done) {
             ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02540)
                          "Custom DH parameters (%d bits) for %s loaded from %s",
                          num_bits, vhost_id, certfile);
         }
     }
 #if !MODSSL_USE_OPENSSL_PRE_1_1_API
-    else {
+    if (!custom_dh_done) {
         /* If no parameter is manually configured, enable auto
          * selection. */
         SSL_CTX_set_dh_auto(mctx->ssl_ctx, 1);