From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 2 Nov 2017 23:11:29 +0300
Subject: Add implementation

---
 mysql/mysys_ssl/my_rnd.cpp | 115 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 mysql/mysys_ssl/my_rnd.cpp

(limited to 'mysql/mysys_ssl/my_rnd.cpp')

diff --git a/mysql/mysys_ssl/my_rnd.cpp b/mysql/mysys_ssl/my_rnd.cpp
new file mode 100644
index 0000000..19fd37e
--- /dev/null
+++ b/mysql/mysys_ssl/my_rnd.cpp
@@ -0,0 +1,115 @@
+/*
+   Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+#include <my_rnd.h>
+
+#if defined(HAVE_YASSL)
+
+#if defined(YASSL_PREFIX)
+#define RAND_bytes yaRAND_bytes
+#endif /* YASSL_PREFIX */
+
+#include <openssl/ssl.h>
+
+#elif defined(HAVE_OPENSSL)
+#include <openssl/rand.h>
+#include <openssl/err.h>
+#endif /* HAVE_YASSL */
+
+
+/*
+  A wrapper to use OpenSSL/yaSSL PRNGs.
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+  Generate random number.
+
+  @param rand_st [INOUT] Structure used for number generation.
+
+  @retval                Generated pseudo random number.
+*/
+
+double my_rnd(struct rand_struct *rand_st)
+{
+  rand_st->seed1= (rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
+  rand_st->seed2= (rand_st->seed1+rand_st->seed2+33) % rand_st->max_value;
+  return (((double) rand_st->seed1) / rand_st->max_value_dbl);
+}
+
+
+
+/**
+Fill a buffer with random bytes using the SSL library routines
+
+@param buffer       [OUT]   Buffer to receive the random data
+@param buffer_size  [IN]    sizeof the the buffer
+
+@retval      1  error ocurred.
+@retval      0  OK
+*/
+int
+my_rand_buffer(unsigned char *buffer, size_t buffer_size)
+{
+  int rc;
+#if defined(HAVE_YASSL) /* YaSSL */
+  rc= yaSSL::RAND_bytes(buffer, buffer_size);
+
+  if (!rc)
+    return 1;
+#elif defined(HAVE_OPENSSL)
+  rc= RAND_bytes(buffer, buffer_size);
+
+  if (!rc)
+  {
+    ERR_clear_error();
+    return 1;
+  }
+#else /* no SSL */
+#error not using an SSL library not supported
+#endif
+  return 0;
+}
+
+
+/**
+  Generate a random number using the OpenSSL/yaSSL supplied
+  random number generator if available.
+
+  @param rand_st [INOUT] Structure used for number generation
+                         only if none of the SSL libraries are
+                         available.
+
+  @retval                Generated random number.
+*/
+
+double my_rnd_ssl(struct rand_struct *rand_st)
+{
+  unsigned int res;
+
+  if (my_rand_buffer((unsigned char *) &res, sizeof(res)))
+    return my_rnd(rand_st);
+
+  return (double)res / (double)UINT_MAX;
+}
+
+
+#ifdef __cplusplus
+}
+#endif
-- 
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