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Diffstat (limited to 'rasmgr/rasmgr_random.cc')
| -rw-r--r-- | rasmgr/rasmgr_random.cc | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/rasmgr/rasmgr_random.cc b/rasmgr/rasmgr_random.cc new file mode 100644 index 0000000..1fc501c --- /dev/null +++ b/rasmgr/rasmgr_random.cc @@ -0,0 +1,176 @@ +/* +* This file is part of rasdaman community. +* +* Rasdaman community 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, either version 3 of the License, or +* (at your option) any later version. +* +* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>. +* +* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann / +rasdaman GmbH. +* +* For more information please see <http://www.rasdaman.org> +* or contact Peter Baumann via <baumann@rasdaman.com>. +/ +/** + * SOURCE: rasmgr_master.hh + * + * MODULE: rasmgr + * CLASS: RandomGenerator + * + * PURPOSE: + * Own "random number generator", used to scramble the authorization file + * + * COMMENTS: + * None + * +*/ +#include "rasmgr_users.hh" + +RandomGenerator::RandomGenerator() + { + // if somebody want's seed=1 inside it's seed =0, due to table generation way + seed=0; + fileVersion=-1; + } + +bool RandomGenerator::setFileVersion(long version) + { + static bool firstCall=true; + fileVersion = version; + if(version == 2 ) return true; // the actual version + + if(version == 1 ) { if(firstCall) std::cout<<"Authorization file will be migrated to the new version"<<std::endl; + firstCall=false; + return true; + } + return false; + } + +void +RandomGenerator::init(unsigned int newSeed) + { + switch(fileVersion) + { + case 1: srand(newSeed); + break; + + case 2: seed = (newSeed-1)%1000; + break; + } + } + +unsigned char +RandomGenerator::operator()() + { + unsigned char rasp = 0; + switch(fileVersion) + { + case 1: rasp=rand(); + break; + + case 2: rasp= randomTable[seed]; + seed=(seed+1)%1000; + break; + } + return rasp; + } + +bool RandomGenerator::insideTest() + { + //performs a test to see if rand() functions like the original one. + // usefull to see if we were paranoic for nothing + + unsigned int oldSeed=seed; + init(1); srand(1); // with other than 1 it breaks + + bool rasp=true; + for(int i=0;i<40;i++) + { + for(int j=0;j<25;j++) + { + unsigned char b=rand(); + if( b!= this->operator()() ) + { rasp=false; + + } + } + } + + seed=oldSeed; + + return rasp; + } + + +/* do not change this table by any means and any reason!! +We used for scrambling the authorization file the standard rand() function, but we are paranoic +that someone could upgrade some system and change the rand function, breaking the decoding of the file +To avoid such trouble, we put a table here generated with: + + srand(1); + + for(int i=0;i<40;i++) + { + for(int j=0;j<25;j++) + { + unsigned char b=rand(); + std::cout<<(unsigned int)b<<','; + } + std::cout<<std::endl; + } + return 0; + +*/ + + +unsigned char RandomGenerator::randomTable[1000]={ +103,198,105,115,81,255,74,236,41,205,186,171,242,251,227,70,124,194,84,248,27,232,231,141,118, +90,46,99,51,159,201,154,102,50,13,183,49,88,163,90,37,93,5,23,88,233,94,212,171,178, +205,198,155,180,84,17,14,130,116,65,33,61,220,135,112,233,62,161,65,225,252,103,62,1,126, +151,234,220,107,150,143,56,92,42,236,176,59,251,50,175,60,84,236,24,219,92,2,26,254,67, +251,250,170,58,251,41,209,230,5,60,124,148,117,216,190,97,137,249,92,187,168,153,15,149,177, +235,241,179,5,239,247,0,233,161,58,229,202,11,203,208,72,71,100,189,31,35,30,168,28,123, +100,197,20,115,90,197,94,75,121,99,59,112,100,36,17,158,9,220,170,212,172,242,27,16,175, +59,51,205,227,80,72,71,21,92,187,111,34,25,186,155,125,245,11,225,26,28,127,35,248,41, +248,164,27,19,181,202,78,232,152,50,56,224,121,77,61,52,188,95,78,119,250,203,108,5,172, +134,33,43,170,26,85,162,190,112,181,115,59,4,92,211,54,148,179,175,226,240,228,158,79,50, +21,73,253,130,78,169,8,112,212,178,138,41,84,72,154,10,188,213,14,24,168,68,172,91,243, +142,76,215,45,155,9,66,229,6,196,51,175,205,163,132,127,45,173,212,118,71,222,50,28,236, +74,196,48,246,32,35,133,108,251,178,7,4,244,236,11,185,32,186,134,195,62,5,241,236,217, +103,51,183,153,80,163,227,20,211,217,52,247,94,160,242,16,168,246,5,148,1,190,180,188,68, +120,250,73,105,230,35,208,26,218,105,106,126,76,126,81,37,179,72,132,83,58,148,251,49,153, +144,50,87,68,238,155,188,233,229,37,207,8,245,233,226,94,83,96,170,210,178,208,133,250,84, +216,53,232,212,102,130,100,152,217,168,135,117,101,112,90,138,63,98,128,41,68,222,124,165,137, +78,87,89,211,81,173,172,134,149,128,236,23,228,133,241,140,12,102,241,124,192,124,187,34,252, +228,102,218,97,11,99,175,98,188,131,180,105,47,58,255,175,39,22,147,172,7,31,184,109,17, +52,45,141,239,79,137,212,182,99,53,193,199,228,36,131,103,216,237,150,18,236,69,57,2,216, +229,10,248,157,119,9,209,165,150,193,244,31,149,170,130,202,108,73,174,144,205,22,104,186,172, +122,166,242,180,168,202,153,178,194,55,42,203,8,207,97,201,195,128,94,110,3,40,218,76,215, +106,25,237,210,211,153,76,121,139,0,34,86,154,212,24,209,254,228,217,205,69,163,145,198,1, +255,201,42,217,21,1,67,47,238,21,2,135,97,124,19,98,158,105,252,114,129,205,113,101,166, +62,171,73,207,113,75,206,58,117,167,79,118,234,126,100,255,129,235,97,253,254,195,155,103,191, +13,233,140,126,78,50,189,249,124,140,106,199,91,164,60,2,244,178,237,114,22,236,243,1,77, +240,0,16,139,103,207,153,80,91,23,159,142,212,152,10,97,3,209,188,167,13,190,155,191,171, +14,213,152,1,214,229,242,214,246,125,62,197,22,142,33,46,45,175,2,198,185,99,201,138,31, +112,151,222,12,86,137,26,43,33,27,1,7,13,216,253,139,22,194,161,164,227,207,210,146,210, +152,75,53,97,213,85,209,108,51,221,194,188,247,237,222,19,239,229,32,199,226,171,221,164,77, +129,136,28,83,26,238,235,102,36,76,59,121,30,168,172,251,106,104,243,88,70,6,71,43,38, +14,13,210,235,178,31,108,58,59,192,84,42,171,186,78,248,246,199,22,158,115,17,8,219,4, +96,34,10,167,77,49,181,91,3,160,13,34,13,71,93,205,155,135,120,86,213,112,76,156,134, +234,15,152,242,235,156,83,13,167,250,90,216,176,181,219,80,194,253,93,9,90,42,165,226,163, +251,183,19,71,84,154,49,99,50,35,78,206,118,91,117,113,182,77,33,107,40,113,46,37,207, +55,128,249,220,98,156,215,25,176,30,109,74,79,209,124,115,31,74,233,123,192,90,49,13,123, +156,54,237,202,91,188,2,219,181,222,61,82,182,87,2,212,196,76,36,149,200,151,181,18,128, +48,210,219,97,224,86,253,22,67,200,113,255,202,77,181,168,138,7,94,225,9,51,166,85,87, +59,29,238,240,47,110,32,2,73,129,226,160,127,248,227,71,105,227,17,182,152,185,65,159,24, +34,168,75,200,253,162,4,26,144,244,73,254,21,75,72,150,45,232,21,37,203,92,143,174,109 +}; |