From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/engine/tb_digest.c | 91 ++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/engine/tb_digest.c

(limited to 'openssl-1.1.0h/crypto/engine/tb_digest.c')

diff --git a/openssl-1.1.0h/crypto/engine/tb_digest.c b/openssl-1.1.0h/crypto/engine/tb_digest.c
new file mode 100644
index 0000000..194b9c7
--- /dev/null
+++ b/openssl-1.1.0h/crypto/engine/tb_digest.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 "eng_int.h"
+
+static ENGINE_TABLE *digest_table = NULL;
+
+void ENGINE_unregister_digests(ENGINE *e)
+{
+    engine_table_unregister(&digest_table, e);
+}
+
+static void engine_unregister_all_digests(void)
+{
+    engine_table_cleanup(&digest_table);
+}
+
+int ENGINE_register_digests(ENGINE *e)
+{
+    if (e->digests) {
+        const int *nids;
+        int num_nids = e->digests(e, NULL, &nids, 0);
+        if (num_nids > 0)
+            return engine_table_register(&digest_table,
+                                         engine_unregister_all_digests, e,
+                                         nids, num_nids, 0);
+    }
+    return 1;
+}
+
+void ENGINE_register_all_digests()
+{
+    ENGINE *e;
+
+    for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
+        ENGINE_register_digests(e);
+}
+
+int ENGINE_set_default_digests(ENGINE *e)
+{
+    if (e->digests) {
+        const int *nids;
+        int num_nids = e->digests(e, NULL, &nids, 0);
+        if (num_nids > 0)
+            return engine_table_register(&digest_table,
+                                         engine_unregister_all_digests, e,
+                                         nids, num_nids, 1);
+    }
+    return 1;
+}
+
+/*
+ * Exposed API function to get a functional reference from the implementation
+ * table (ie. try to get a functional reference from the tabled structural
+ * references) for a given digest 'nid'
+ */
+ENGINE *ENGINE_get_digest_engine(int nid)
+{
+    return engine_table_select(&digest_table, nid);
+}
+
+/* Obtains a digest implementation from an ENGINE functional reference */
+const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid)
+{
+    const EVP_MD *ret;
+    ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
+    if (!fn || !fn(e, &ret, NULL, nid)) {
+        ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST, ENGINE_R_UNIMPLEMENTED_DIGEST);
+        return NULL;
+    }
+    return ret;
+}
+
+/* Gets the digest callback from an ENGINE structure */
+ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e)
+{
+    return e->digests;
+}
+
+/* Sets the digest callback in an ENGINE structure */
+int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
+{
+    e->digests = f;
+    return 1;
+}
-- 
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