Provide a bunch of always failing ENGINE API

This commit adds a few symbols under OPENSSL_NO_ENGINE. They will be used
after the main ENGINE code is disabled in the next bump.

The ecosystem is mostly prepared for dealing with a libcrypto compiled
with OPENSSL_NO_ENGINE. There are a few stragglers like M2Crypto, dovecot
and the latest apr-util release (fixed in their development branch).

To avoid intrusive patching in these ports, we need to keep a bunch of
ENGINE symbols around despite adding OPENSSL_NO_ENGINE. This of course
meant patching some other ports, but that was way easier.

ok jsing

1 files changed, 125 insertions, 0 deletions

diff --git a/src/lib/libcrypto/engine/engine_stubs.c b/src/lib/libcrypto/engine/engine_stubs.c
new file mode 100644
index 0000000000..3621da80ef
--- /dev/null
+++ b/src/lib/libcrypto/engine/engine_stubs.c
@@ -0,0 +1,125 @@
+/*      $OpenBSD: engine_stubs.c,v 1.1 2023/07/21 09:04:23 tb Exp $ */
+
+/*
+ * Written by Theo Buehler. Public domain.
+ */
+
+#include <openssl/engine.h>
+
+#ifdef OPENSSL_NO_ENGINE
+
+void
+ENGINE_load_builtin_engines(void)
+{
+}
+
+void
+ENGINE_load_dynamic(void)
+{
+}
+
+void
+ENGINE_load_openssl(void)
+{
+}
+
+int
+ENGINE_register_all_complete(void)
+{
+        return 0;
+}
+
+void
+ENGINE_cleanup(void)
+{
+}
+
+ENGINE *
+ENGINE_new(void)
+{
+        return NULL;
+}
+
+int
+ENGINE_free(ENGINE *engine)
+{
+        return 0;
+}
+
+int
+ENGINE_init(ENGINE *engine)
+{
+        return 0;
+}
+
+int
+ENGINE_finish(ENGINE *engine)
+{
+        return 0;
+}
+
+ENGINE *
+ENGINE_by_id(const char *id)
+{
+        return NULL;
+}
+
+const char *
+ENGINE_get_id(const ENGINE *engine)
+{
+        return "";
+}
+
+const char *
+ENGINE_get_name(const ENGINE *engine)
+{
+        return "";
+}
+
+int
+ENGINE_set_default(ENGINE *engine, unsigned int flags)
+{
+        return 0;
+}
+
+ENGINE *
+ENGINE_get_default_RSA(void)
+{
+        return NULL;
+}
+
+int
+ENGINE_set_default_RSA(ENGINE *engine)
+{
+        return 0;
+}
+
+int
+ENGINE_ctrl_cmd(ENGINE *e, const char *cmd_name, long i, void *p,
+    void (*f)(void), int cmd_optional)
+{
+        return 0;
+}
+
+int
+ENGINE_ctrl_cmd_string(ENGINE *engine, const char *cmd, const char *arg,
+    int cmd_optional)
+{
+        return 0;
+}
+
+EVP_PKEY *
+ENGINE_load_private_key(ENGINE *engine, const char *key_id,
+    UI_METHOD *ui_method, void *callback_data)
+{
+        return NULL;
+}
+
+EVP_PKEY *
+ENGINE_load_public_key(ENGINE *engine, const char *key_id,
+    UI_METHOD *ui_method, void *callback_data)
+{
+        return NULL;
+}
+
+#endif