zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/engine/tb_digest.c b/ap/lib/libssl/openssl-1.1.1o/crypto/engine/tb_digest.c
new file mode 100644
index 0000000..a6e6337
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/engine/tb_digest.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2001-2018 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_local.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(void)
+{
+ 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;
+}