BGI/SOAPsnp/accessControl.cpp

   1 /*
   2  * accessControl.c
   3  *
   4  *  Created on: Aug 30, 2010
   5  *      Author: Aqua
   6  */
   7
   8 #include"accessControl.h"
   9 #include<stdio.h>
  10 #include<stdlib.h>
  11 #include<string.h>
  12 #include<unistd.h>
  13
  14 #define signal unsigned char
  15 #define passed 0
  16 #define versionFailureSignal 1
  17 #define userFailureSignal 2
  18 #define unknownFailureSignal 255
  19
  20 static int crc_table[256] = {
  21         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
  22         0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
  23         0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
  24         0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  25         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
  26         0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  27         0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
  28         0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  29         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
  30         0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
  31         0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
  32         0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  33         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
  34         0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
  35         0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
  36         0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  37         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
  38         0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  39         0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
  40         0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  41         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
  42         0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
  43         0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
  44         0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  45         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
  46         0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
  47         0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
  48         0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  49         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
  50         0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  51         0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
  52         0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  53         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
  54         0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
  55         0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
  56         0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  57         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
  58         0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
  59         0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
  60         0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  61         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
  62         0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  63         0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
  64         0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  65         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
  66         0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
  67         0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
  68         0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  69         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
  70         0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
  71         0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
  72         0x2d02ef8d
  73 };
  74
  75 static int crc32(int crc, const char *buf, int len)
  76 {
  77         if (buf == NULL)
  78                 return 0;
  79
  80         crc = crc ^ 0xffffffff;
  81         while (len--) {
  82                 crc = crc_table[((int) crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
  83         }
  84
  85         return crc ^ 0xffffffff;
  86 }
  87
  88 signal AccessControlCore(const char * cfgFile, const char * ver)
  89 {
  90         if(!strlen(cfgFile))
  91         {
  92                 return passed;
  93         }
  94         if(access(cfgFile, F_OK) != 0)
  95         {
  96                 return passed;
  97         }
  98
  99         FILE * fh;
 100         fh = fopen(cfgFile, "r");
 101         if(fh == NULL)
 102         {
 103                 return passed;
 104         }
 105
 106         int starCount = 0;
 107         int versionHit = 0, userHit = 0;
 108         char userName[128];
 109         getlogin_r(userName, 127);
 110         char buf[1024];
 111         char str[1024];
 112         while(1)
 113         {
 114                 fgets(buf, 1023, fh);
 115                 if(feof(fh))
 116                         break;
 117                 sscanf(buf, "%s", str);
 118
 119                 if(strpbrk(str, "*-+=") != NULL)
 120                 {
 121                         ++starCount;
 122                         continue;
 123                 }
 124                 else if(starCount == 1)
 125                 {
 126                         if(!strlen(ver))
 127                         {
 128                                 ++versionHit;
 129                                 continue;
 130                         }
 131                         if(atoi(str) == crc32(0, ver, strlen(ver)))
 132                         {
 133                                 ++versionHit;
 134                         }
 135                 }
 136                 else if(starCount == 2)
 137                 {
 138                         if(atoi(str) == crc32(0, "all", strlen("all")))
 139                         {
 140                                 ++userHit;
 141                         }
 142                         if(atoi(str) == crc32(0, userName, strlen(userName)))
 143                         {
 144                                 ++userHit;
 145                         }
 146                 }
 147         }
 148         fclose(fh);
 149
 150         if(!versionHit)
 151                 return versionFailureSignal;
 152         else if(!userHit)
 153                 return userFailureSignal;
 154         else
 155                 return passed;
 156 }
 157
 158 void AccessControl(const char * cfgFile, const char * ver)
 159 {
 160         signal sig = AccessControlCore(cfgFile, ver);
 161         if(sig == versionFailureSignal)
 162         {
 163                 fprintf(stderr, "Version %s is currently disabled. Please contact the author for the latest version.\n", ver);
 164                 fprintf(stderr, "Program terminated!\n");
 165                 exit(EXIT_FAILURE);
 166         }
 167         else if(sig == userFailureSignal)
 168         {
 169                 char userName[128];
 170                 getlogin_r(userName, 127);
 171                 fprintf(stderr, "User %s is unauthorized to run this program.\n", userName);
 172                 fprintf(stderr, "Program terminated!\n");
 173                 exit(EXIT_FAILURE);
 174         }
 175         else if(sig == unknownFailureSignal)
 176         {
 177                 fprintf(stderr, "Unexpected exceptation in access controling system. Please contact the author for more details\n");
 178                 fprintf(stderr, "Program terminated!\n");
 179                 exit(EXIT_FAILURE);
 180         }
 181
 182         fprintf(stderr, "Authorized!\n");
 183 }
 184
 185 void EasyCalcCRC32(const char * str)
 186 {
 187         fprintf(stderr, "%d\n", crc32(0, str, strlen(str)));
 188 }
 189