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77 lines
2 KiB
C++
77 lines
2 KiB
C++
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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/*
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Functions to handle the encode() and decode() functions
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The strongness of this crypt is large based on how good the random
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generator is. It should be ok for short strings, but for communication one
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needs something like 'ssh'.
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*/
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#ifdef USE_PRAGMA_IMPLEMENTATION
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#pragma implementation // gcc: Class implementation
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#endif
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#include "mariadb.h"
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#include "sql_priv.h"
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#include "sql_crypt.h"
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#include "password.h"
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void SQL_CRYPT::init(ulong *rand_nr)
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{
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uint i;
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my_rnd_init(&rand,rand_nr[0],rand_nr[1]);
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for (i=0 ; i<=255; i++)
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decode_buff[i]= (char) i;
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for (i=0 ; i<= 255 ; i++)
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{
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int idx= (uint) (my_rnd(&rand)*255.0);
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char a= decode_buff[idx];
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decode_buff[idx]= decode_buff[i];
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decode_buff[+i]=a;
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}
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for (i=0 ; i <= 255 ; i++)
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encode_buff[(uchar) decode_buff[i]]=i;
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org_rand=rand;
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shift=0;
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}
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void SQL_CRYPT::encode(char *str,uint length)
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{
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for (uint i=0; i < length; i++)
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{
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shift^=(uint) (my_rnd(&rand)*255.0);
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uint idx= (uint) (uchar) str[0];
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*str++ = (char) ((uchar) encode_buff[idx] ^ shift);
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shift^= idx;
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}
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}
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void SQL_CRYPT::decode(char *str,uint length)
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{
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for (uint i=0; i < length; i++)
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{
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shift^=(uint) (my_rnd(&rand)*255.0);
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uint idx= (uint) ((uchar) str[0] ^ shift);
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*str = decode_buff[idx];
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shift^= (uint) (uchar) *str++;
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}
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}
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