mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
5e4b657dd4
- Add new submodule for WolfSSL - Build and use wolfssl and wolfcrypt instead of yassl/taocrypt - Use HAVE_WOLFSSL instead of HAVE_YASSL - Increase MY_AES_CTX_SIZE, to avoid compile time asserts in my_crypt.cc (sizeof(EVP_CIPHER_CTX) is larger on WolfSSL)
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* Copyright (C) 2007 MySQL AB & Michael Widenius
|
|
|
|
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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
|
|
|
|
#include "mysys_priv.h"
|
|
#include <my_rnd.h>
|
|
#include <m_string.h>
|
|
|
|
/*
|
|
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.
|
|
|
|
SYNOPSIS
|
|
my_rnd()
|
|
rand_st INOUT Structure used for number generation
|
|
|
|
RETURN VALUE
|
|
generated pseudo random number
|
|
|
|
NOTE:
|
|
This is codes so that it can be called by two threads at the same time
|
|
with minimum impact.
|
|
(As the number is supposed to be random, it doesn't matter much if
|
|
rand->seed1 or rand->seed2 are updated with slightly wrong numbers or
|
|
if two threads gets the same number.
|
|
*/
|
|
|
|
double my_rnd(struct my_rnd_struct *rand_st)
|
|
{
|
|
unsigned long seed1;
|
|
seed1= (rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
|
|
rand_st->seed2=(seed1+rand_st->seed2+33) % rand_st->max_value;
|
|
rand_st->seed1= seed1;
|
|
return (((double) 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_OPENSSL)
|
|
rc= RAND_bytes((unsigned char *) &res, sizeof (unsigned int));
|
|
if (rc)
|
|
return (double)res / (double)UINT_MAX;
|
|
#endif /* defined(HAVE_OPENSSL) */
|
|
|
|
return my_rnd(rand_st);
|
|
}
|