mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
77 lines
2 KiB
C++
77 lines
2 KiB
C++
/*
|
|
Copyright (c) 2000, 2003, 2005, 2006 MySQL AB, 2009 Sun Microsystems, Inc.
|
|
Use is subject to license terms.
|
|
|
|
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
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
Functions to handle the encode() and decode() functions
|
|
The strongness of this crypt is large based on how good the random
|
|
generator is. It should be ok for short strings, but for communication one
|
|
needs something like 'ssh'.
|
|
*/
|
|
|
|
#ifdef USE_PRAGMA_IMPLEMENTATION
|
|
#pragma implementation // gcc: Class implementation
|
|
#endif
|
|
|
|
#include "mysql_priv.h"
|
|
|
|
void SQL_CRYPT::init(ulong *rand_nr)
|
|
{
|
|
uint i;
|
|
my_rnd_init(&rand,rand_nr[0],rand_nr[1]);
|
|
|
|
for (i=0 ; i<=255; i++)
|
|
decode_buff[i]= (char) i;
|
|
|
|
for (i=0 ; i<= 255 ; i++)
|
|
{
|
|
int idx= (uint) (my_rnd(&rand)*255.0);
|
|
char a= decode_buff[idx];
|
|
decode_buff[idx]= decode_buff[i];
|
|
decode_buff[+i]=a;
|
|
}
|
|
for (i=0 ; i <= 255 ; i++)
|
|
encode_buff[(uchar) decode_buff[i]]=i;
|
|
org_rand=rand;
|
|
shift=0;
|
|
}
|
|
|
|
|
|
void SQL_CRYPT::encode(char *str,uint length)
|
|
{
|
|
for (uint i=0; i < length; i++)
|
|
{
|
|
shift^=(uint) (my_rnd(&rand)*255.0);
|
|
uint idx= (uint) (uchar) str[0];
|
|
*str++ = (char) ((uchar) encode_buff[idx] ^ shift);
|
|
shift^= idx;
|
|
}
|
|
}
|
|
|
|
|
|
void SQL_CRYPT::decode(char *str,uint length)
|
|
{
|
|
for (uint i=0; i < length; i++)
|
|
{
|
|
shift^=(uint) (my_rnd(&rand)*255.0);
|
|
uint idx= (uint) ((uchar) str[0] ^ shift);
|
|
*str = decode_buff[idx];
|
|
shift^= (uint) (uchar) *str++;
|
|
}
|
|
}
|