Add a legacy provider and put MD2 in it

[thirdparty/openssl.git] / providers / legacy / legacyprov.c

diff --git a/providers/legacy/legacyprov.c b/providers/legacy/legacyprov.c
new file mode 100644 (file)
index 0000000..48e8933
--- /dev/null
+++ b/providers/legacy/legacyprov.c
@@ -0,0 +1,101 @@
+/*
+ * 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 legacy_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 *legacy_get_param_types(const OSSL_PROVIDER *prov)
+{
+    return legacy_param_types;
+}
+
+static int legacy_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 Legacy 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;
+}
+
+extern const OSSL_DISPATCH md2_functions[];
+
+static const OSSL_ALGORITHM legacy_digests[] = {
+#ifndef OPENSSL_NO_MD2
+    { "MD2", "legacy=yes", md2_functions },
+#endif
+    { NULL, NULL, NULL }
+};
+
+static const OSSL_ALGORITHM *legacy_query(OSSL_PROVIDER *prov,
+                                          int operation_id,
+                                          int *no_cache)
+{
+    *no_cache = 0;
+    switch (operation_id) {
+    case OSSL_OP_DIGEST:
+        return legacy_digests;
+    }
+    return NULL;
+}
+
+/* Functions we provide to the core */
+static const OSSL_DISPATCH legacy_dispatch_table[] = {
+    { OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))legacy_get_param_types },
+    { OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))legacy_get_params },
+    { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))legacy_query },
+    { 0, NULL }
+};
+
+int OSSL_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;
+        /* Just ignore anything we don't understand */
+        default:
+            break;
+        }
+    }
+
+    *out = legacy_dispatch_table;
+    return 1;
+}