1 files changed, 103 insertions, 0 deletions
diff --git a/mysys_ssl/my_rnd.cc b/mysys_ssl/my_rnd.cc
new file mode 100644
index 00000000000..aa8fb63cd4d
--- /dev/null
+++ b/mysys_ssl/my_rnd.cc
@@ -0,0 +1,103 @@
+/*
+   Copyright (c) 2012, 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_global.h>
+#include <my_rnd.h>
+#include <m_string.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>
+#endif /* HAVE_YASSL */
+
+
+/*
+  A wrapper to use OpenSSL/yaSSL PRNGs.
+*/
+
+extern "C" {
+
+/*
+  Initialize random generator
+
+  NOTES
+    MySQL's password checks depends on this, so don't do any changes
+    that changes the random numbers that are generated!
+*/
+
+void my_rnd_init(struct my_rnd_struct *rand_st, ulong seed1, ulong seed2)
+{
+#ifdef HAVE_valgrind
+  bzero((char*) rand_st,sizeof(*rand_st));      /* Avoid UMC varnings */
+#endif
+  rand_st->max_value= 0x3FFFFFFFL;
+  rand_st->max_value_dbl=(double) rand_st->max_value;
+  rand_st->seed1=seed1%rand_st->max_value ;
+  rand_st->seed2=seed2%rand_st->max_value;
+}
+
+/**
+  Generate random number.
+
+  @param rand_st [INOUT] Structure used for number generation.
+
+  @retval                Generated pseudo random number.
+*/
+
+double my_rnd(struct my_rnd_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);
+}
+
+/**
+  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 my_rnd_struct *rand_st)
+{
+
+#if defined(HAVE_YASSL) || defined(HAVE_OPENSSL)
+  int rc;
+  unsigned int res;
+
+#if defined(HAVE_YASSL)
+  rc= yaSSL::RAND_bytes((unsigned char *) &res, sizeof (unsigned int));
+#else
+  rc= RAND_bytes((unsigned char *) &res, sizeof (unsigned int));
+#endif /* HAVE_YASSL */
+  if (rc)
+    return (double)res / (double)UINT_MAX;
+
+#endif /* defined(HAVE_YASSL) || defined(HAVE_OPENSSL) */
+  return my_rnd(rand_st);
+}
+
+}