src/uuid.c

   1 /**
   2  * @file uuid.c
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24
  25
  26 #ifndef _WIN32
  27 #include <sys/ioctl.h>
  28 #include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <netinet/in.h>
  31 #include <linux/if.h>
  32 #else
  33 #ifdef _DLL
  34 #define _WS2TCPIP_H_
  35 #define _WINSOCK2API_
  36 #define _LIBC_INTERNAL_
  37 #endif /* _DLL */
  38
  39 #include "internal.h"
  40 #endif /* _WIN32 */
  41
  42 #include <cipher.h>
  43 #include <glib.h>
  44 #include "uuid.h"
  45
  46 static const char *epid_ns_uuid = "fcacfb03-8a73-46ef-91b1-e5ebeeaba4fe";
  47
  48 #define UUID_OFFSET_TO_LAST_SEGMENT 24
  49
  50 void readUUID(const char *string, sipe_uuid_t *uuid)
  51 {
  52         int i;
  53         sscanf(string, "%08x-%04hx-%04hx-%02hhx%02hhx-", &uuid->time_low
  54                         , &uuid->time_mid, &uuid->time_hi_and_version
  55                         , &uuid->clock_seq_hi_and_reserved
  56                         , &uuid->clock_seq_low );
  57
  58         for(i=0;i<6;i++)
  59         {
  60                 sscanf(&string[UUID_OFFSET_TO_LAST_SEGMENT+i*2], "%02hhx", &uuid->node[i]);
  61         }
  62 }
  63
  64 void printUUID(sipe_uuid_t *uuid, char *string)
  65 {
  66         int i;
  67         size_t pos;
  68         sprintf(string, "%08x-%04x-%04x-%02x%02x-", uuid->time_low
  69                         , uuid->time_mid, uuid->time_hi_and_version
  70                         , uuid->clock_seq_hi_and_reserved
  71                         , uuid->clock_seq_low
  72                         );
  73         pos = strlen(string);
  74         for(i=0;i<6;i++)
  75         {
  76                 pos += sprintf(&string[pos], "%02x", uuid->node[i]);
  77         }
  78 }
  79
  80 void createUUIDfromHash(sipe_uuid_t *uuid, const unsigned char *hash)
  81 {
  82         memcpy(uuid, hash, sizeof(sipe_uuid_t));
  83         uuid->time_hi_and_version &= 0x0FFF;
  84         uuid->time_hi_and_version |= 0x5000;
  85         uuid->clock_seq_hi_and_reserved &= 0x3F;
  86         uuid->clock_seq_hi_and_reserved |= 0x80;
  87 }
  88
  89 char *generateUUIDfromEPID(const gchar *epid)
  90 {
  91         sipe_uuid_t result;
  92         PurpleCipherContext *ctx;
  93         unsigned char hash[20];
  94         char buf[512];
  95
  96         readUUID(epid_ns_uuid, &result);
  97         memcpy(buf, &result, sizeof(sipe_uuid_t));
  98         sprintf(&buf[sizeof(sipe_uuid_t)], epid);
  99
 100         ctx = purple_cipher_context_new_by_name("sha1", NULL);
 101         purple_cipher_context_append(ctx, buf, strlen(buf));
 102         purple_cipher_context_digest(ctx, sizeof(hash), hash, NULL);
 103         purple_cipher_context_destroy(ctx);
 104
 105         createUUIDfromHash(&result, hash);
 106         printUUID(&result, buf);
 107         return g_strdup(buf);
 108 }
 109
 110 long mac_addr_sys (const char *addr)
 111 {
 112 #ifdef _WIN32
 113         return 0x0BB288B0;
 114 #else
 115 /* implementation for Linux */
 116     struct ifreq ifr;
 117     struct ifreq *IFR;
 118     struct ifconf ifc;
 119     char buf[1024];
 120     int s, i;
 121     int ok = 0;
 122
 123     s = socket(AF_INET, SOCK_DGRAM, 0);
 124     if (s==-1) {
 125         return -1;
 126     }
 127
 128     ifc.ifc_len = sizeof(buf);
 129     ifc.ifc_buf = buf;
 130     ioctl(s, SIOCGIFCONF, &ifc);
 131
 132     IFR = ifc.ifc_req;
 133     for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; IFR++) {
 134
 135         strcpy(ifr.ifr_name, IFR->ifr_name);
 136         if (ioctl(s, SIOCGIFFLAGS, &ifr) == 0) {
 137             if (! (ifr.ifr_flags & IFF_LOOPBACK)) {
 138                 if (ioctl(s, SIOCGIFHWADDR, &ifr) == 0) {
 139                     ok = 1;
 140                     break;
 141                 }
 142             }
 143         }
 144     }
 145
 146     close(s);
 147     if (ok) {
 148         memmove((void *)addr, ifr.ifr_hwaddr.sa_data, 6);
 149     }
 150     else {
 151         return -1;
 152     }
 153     return 0;
 154 #endif
 155 }
 156
 157 gchar * sipe_uuid_get_macaddr()
 158 {
 159         guchar addr[6];
 160         long mac_add = mac_addr_sys(addr);
 161         gchar nmac[13];
 162
 163         if (mac_add == 0){
 164                 int i,j;
 165                 for (i = 0,j=0; i < 6; i++,j+=2) {
 166                         g_sprintf(&nmac[j], "%02X", addr[i]);
 167                 }
 168                 return g_strdup(nmac);
 169         }
 170         return g_strdup_printf("01010101");  //Default
 171 }