1 /* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; version 2 of the License. 6 7 This program is distributed in the hope that it will be useful, 8 but WITHOUT ANY WARRANTY; without even the implied warranty of 9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 GNU General Public License for more details. 11 12 You should have received a copy of the GNU General Public License 13 along with this program; if not, write to the Free Software 14 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ 15 16 17 18 /* 19 Functions to handle the encode() and decode() functions 20 The strongness of this crypt is large based on how good the random 21 generator is. It should be ok for short strings, but for communication one 22 needs something like 'ssh'. 23 */ 24 25 #ifdef USE_PRAGMA_IMPLEMENTATION 26 #pragma implementation // gcc: Class implementation 27 #endif 28 29 #include "mariadb.h" 30 #include "sql_priv.h" 31 #include "sql_crypt.h" 32 #include "password.h" 33 34 void SQL_CRYPT::init(ulong *rand_nr) 35 { 36 uint i; 37 my_rnd_init(&rand,rand_nr[0],rand_nr[1]); 38 39 for (i=0 ; i<=255; i++) 40 decode_buff[i]= (char) i; 41 42 for (i=0 ; i<= 255 ; i++) 43 { 44 int idx= (uint) (my_rnd(&rand)*255.0); 45 char a= decode_buff[idx]; 46 decode_buff[idx]= decode_buff[i]; 47 decode_buff[+i]=a; 48 } 49 for (i=0 ; i <= 255 ; i++) 50 encode_buff[(uchar) decode_buff[i]]=i; 51 org_rand=rand; 52 shift=0; 53 } 54 55 56 void SQL_CRYPT::encode(char *str,uint length) 57 { 58 for (uint i=0; i < length; i++) 59 { 60 shift^=(uint) (my_rnd(&rand)*255.0); 61 uint idx= (uint) (uchar) str[0]; 62 *str++ = (char) ((uchar) encode_buff[idx] ^ shift); 63 shift^= idx; 64 } 65 } 66 67 68 void SQL_CRYPT::decode(char *str,uint length) 69 { 70 for (uint i=0; i < length; i++) 71 { 72 shift^=(uint) (my_rnd(&rand)*255.0); 73 uint idx= (uint) ((uchar) str[0] ^ shift); 74 *str = decode_buff[idx]; 75 shift^= (uint) (uchar) *str++; 76 } 77 } 78