Add a minimal test provider

We test its validity by trying to load it.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Todd Short <todd.short@me.com>
(Merged from https://github.com/openssl/openssl/pull/22866)

1 files changed, 24 insertions, 0 deletions

diff --git a/test/p_minimal.c b/test/p_minimal.c
new file mode 100644
index 0000000000..0bff9823f8
--- /dev/null
+++ b/test/p_minimal.c
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/*
+ * This is the most minimal provider imaginable.  It can be loaded, and does
+ * absolutely nothing else.
+ */
+
+#include <openssl/core.h>
+
+OSSL_provider_init_fn OSSL_provider_init; /* Check the function signature */
+int OSSL_provider_init(const OSSL_CORE_HANDLE *handle,
+                       const OSSL_DISPATCH *oin,
+                       const OSSL_DISPATCH **out,
+                       void **provctx)
+{
+    return 1;
+}