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/eng_init.c | 108 ++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/engine/eng_init.c

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

diff --git a/openssl-1.1.0h/crypto/engine/eng_init.c b/openssl-1.1.0h/crypto/engine/eng_init.c
new file mode 100644
index 0000000..8be7c6f
--- /dev/null
+++ b/openssl-1.1.0h/crypto/engine/eng_init.c
@@ -0,0 +1,108 @@
+/*
+ * 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"
+
+/*
+ * Initialise a engine type for use (or up its functional reference count if
+ * it's already in use). This version is only used internally.
+ */
+int engine_unlocked_init(ENGINE *e)
+{
+    int to_return = 1;
+
+    if ((e->funct_ref == 0) && e->init)
+        /*
+         * This is the first functional reference and the engine requires
+         * initialisation so we do it now.
+         */
+        to_return = e->init(e);
+    if (to_return) {
+        /*
+         * OK, we return a functional reference which is also a structural
+         * reference.
+         */
+        e->struct_ref++;
+        e->funct_ref++;
+        engine_ref_debug(e, 0, 1);
+        engine_ref_debug(e, 1, 1);
+    }
+    return to_return;
+}
+
+/*
+ * Free a functional reference to a engine type. This version is only used
+ * internally.
+ */
+int engine_unlocked_finish(ENGINE *e, int unlock_for_handlers)
+{
+    int to_return = 1;
+
+    /*
+     * Reduce the functional reference count here so if it's the terminating
+     * case, we can release the lock safely and call the finish() handler
+     * without risk of a race. We get a race if we leave the count until
+     * after and something else is calling "finish" at the same time -
+     * there's a chance that both threads will together take the count from 2
+     * to 0 without either calling finish().
+     */
+    e->funct_ref--;
+    engine_ref_debug(e, 1, -1);
+    if ((e->funct_ref == 0) && e->finish) {
+        if (unlock_for_handlers)
+            CRYPTO_THREAD_unlock(global_engine_lock);
+        to_return = e->finish(e);
+        if (unlock_for_handlers)
+            CRYPTO_THREAD_write_lock(global_engine_lock);
+        if (!to_return)
+            return 0;
+    }
+    REF_ASSERT_ISNT(e->funct_ref < 0);
+    /* Release the structural reference too */
+    if (!engine_free_util(e, 0)) {
+        ENGINEerr(ENGINE_F_ENGINE_UNLOCKED_FINISH, ENGINE_R_FINISH_FAILED);
+        return 0;
+    }
+    return to_return;
+}
+
+/* The API (locked) version of "init" */
+int ENGINE_init(ENGINE *e)
+{
+    int ret;
+    if (e == NULL) {
+        ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_PASSED_NULL_PARAMETER);
+        return 0;
+    }
+    if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
+        ENGINEerr(ENGINE_F_ENGINE_INIT, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    CRYPTO_THREAD_write_lock(global_engine_lock);
+    ret = engine_unlocked_init(e);
+    CRYPTO_THREAD_unlock(global_engine_lock);
+    return ret;
+}
+
+/* The API (locked) version of "finish" */
+int ENGINE_finish(ENGINE *e)
+{
+    int to_return = 1;
+
+    if (e == NULL)
+        return 1;
+    CRYPTO_THREAD_write_lock(global_engine_lock);
+    to_return = engine_unlocked_finish(e, 1);
+    CRYPTO_THREAD_unlock(global_engine_lock);
+    if (!to_return) {
+        ENGINEerr(ENGINE_F_ENGINE_FINISH, ENGINE_R_FINISH_FAILED);
+        return 0;
+    }
+    return to_return;
+}
-- 
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