Add a skeleton default provider

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8513)

2 files changed, 84 insertions, 0 deletions

diff --git a/providers/default/build.info b/providers/default/build.info
new file mode 100644
index 0000000000..eab90a3e3e
--- /dev/null
+++ b/providers/default/build.info
@@ -0,0 +1,3 @@
+LIBS=../../libcrypto
+SOURCE[../../libcrypto]=\
+        defltprov.c
diff --git a/providers/default/defltprov.c b/providers/default/defltprov.c
new file mode 100644
index 0000000000..27903098a7
--- /dev/null
+++ b/providers/default/defltprov.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2019 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
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <openssl/core.h>
+#include <openssl/core_numbers.h>
+#include <openssl/core_names.h>
+#include <openssl/params.h>
+
+/* Functions provided by the core */
+static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
+static OSSL_core_get_params_fn *c_get_params = NULL;
+
+/* Parameters we provide to the core */
+static const OSSL_ITEM deflt_param_types[] = {
+    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
+    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
+    { OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
+    { 0, NULL }
+};
+
+static const OSSL_ITEM *deflt_get_param_types(const OSSL_PROVIDER *prov)
+{
+    return deflt_param_types;
+}
+
+static int deflt_get_params(const OSSL_PROVIDER *prov,
+                            const OSSL_PARAM params[])
+{
+    const OSSL_PARAM *p;
+
+    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
+    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Default Provider"))
+        return 0;
+    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
+    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
+        return 0;
+    p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
+    if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
+        return 0;
+
+    return 1;
+}
+
+/* Functions we provide to the core */
+static const OSSL_DISPATCH deflt_dispatch_table[] = {
+    { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))deflt_get_param_types },
+    { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))deflt_get_params },
+    { 0, NULL }
+};
+
+OSSL_provider_init_fn ossl_default_provider_init;
+
+int ossl_default_provider_init(const OSSL_PROVIDER *provider,
+                               const OSSL_DISPATCH *in,
+                               const OSSL_DISPATCH **out)
+{
+    for (; in->function_id != 0; in++) {
+        switch (in->function_id) {
+        case OSSL_FUNC_CORE_GET_PARAM_TYPES:
+            c_get_param_types = OSSL_get_core_get_param_types(in);
+            break;
+        case OSSL_FUNC_CORE_GET_PARAMS:
+            c_get_params = OSSL_get_core_get_params(in);
+            break;
+        default:
+            /* Just ignore anything we don't understand */
+            break;
+        }
+    }
+
+    *out = deflt_dispatch_table;
+    return 1;
+}