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_rdrand.c | 110 ++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/engine/eng_rdrand.c

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

diff --git a/openssl-1.1.0h/crypto/engine/eng_rdrand.c b/openssl-1.1.0h/crypto/engine/eng_rdrand.c
new file mode 100644
index 0000000..b3defcb
--- /dev/null
+++ b/openssl-1.1.0h/crypto/engine/eng_rdrand.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2011-2016 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 <openssl/opensslconf.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <internal/engine.h>
+#include <openssl/rand.h>
+#include <openssl/err.h>
+#include <openssl/crypto.h>
+
+#if (defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
+     defined(__x86_64) || defined(__x86_64__) || \
+     defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
+
+size_t OPENSSL_ia32_rdrand(void);
+
+static int get_random_bytes(unsigned char *buf, int num)
+{
+    size_t rnd;
+
+    while (num >= (int)sizeof(size_t)) {
+        if ((rnd = OPENSSL_ia32_rdrand()) == 0)
+            return 0;
+
+        *((size_t *)buf) = rnd;
+        buf += sizeof(size_t);
+        num -= sizeof(size_t);
+    }
+    if (num) {
+        if ((rnd = OPENSSL_ia32_rdrand()) == 0)
+            return 0;
+
+        memcpy(buf, &rnd, num);
+    }
+
+    return 1;
+}
+
+static int random_status(void)
+{
+    return 1;
+}
+
+static RAND_METHOD rdrand_meth = {
+    NULL,                       /* seed */
+    get_random_bytes,
+    NULL,                       /* cleanup */
+    NULL,                       /* add */
+    get_random_bytes,
+    random_status,
+};
+
+static int rdrand_init(ENGINE *e)
+{
+    return 1;
+}
+
+static const char *engine_e_rdrand_id = "rdrand";
+static const char *engine_e_rdrand_name = "Intel RDRAND engine";
+
+static int bind_helper(ENGINE *e)
+{
+    if (!ENGINE_set_id(e, engine_e_rdrand_id) ||
+        !ENGINE_set_name(e, engine_e_rdrand_name) ||
+        !ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) ||
+        !ENGINE_set_init_function(e, rdrand_init) ||
+        !ENGINE_set_RAND(e, &rdrand_meth))
+        return 0;
+
+    return 1;
+}
+
+static ENGINE *ENGINE_rdrand(void)
+{
+    ENGINE *ret = ENGINE_new();
+    if (ret == NULL)
+        return NULL;
+    if (!bind_helper(ret)) {
+        ENGINE_free(ret);
+        return NULL;
+    }
+    return ret;
+}
+
+void engine_load_rdrand_int(void)
+{
+    extern unsigned int OPENSSL_ia32cap_P[];
+
+    if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
+        ENGINE *toadd = ENGINE_rdrand();
+        if (!toadd)
+            return;
+        ENGINE_add(toadd);
+        ENGINE_free(toadd);
+        ERR_clear_error();
+    }
+}
+#else
+void engine_load_rdrand_int(void)
+{
+}
+#endif
-- 
cgit v1.2.3