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 #include "internal.h"
  39 #include <iphlpapi.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 #ifndef _WIN32
 111 long mac_addr_sys (const char *addr)
 112 {
 113 /* implementation for Linux */
 114     struct ifreq ifr;
 115     struct ifreq *IFR;
 116     struct ifconf ifc;
 117     char buf[1024];
 118     int s, i;
 119     int ok = 0;
 120
 121     s = socket(AF_INET, SOCK_DGRAM, 0);
 122     if (s==-1) {
 123         return -1;
 124     }
 125
 126     ifc.ifc_len = sizeof(buf);
 127     ifc.ifc_buf = buf;
 128     ioctl(s, SIOCGIFCONF, &ifc);
 129
 130     IFR = ifc.ifc_req;
 131     for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; IFR++) {
 132
 133         strcpy(ifr.ifr_name, IFR->ifr_name);
 134         if (ioctl(s, SIOCGIFFLAGS, &ifr) == 0) {
 135             if (! (ifr.ifr_flags & IFF_LOOPBACK)) {
 136                 if (ioctl(s, SIOCGIFHWADDR, &ifr) == 0) {
 137                     ok = 1;
 138                     break;
 139                 }
 140             }
 141         }
 142     }
 143
 144     close(s);
 145     if (ok) {
 146         memmove((void *)addr, ifr.ifr_hwaddr.sa_data, 6);
 147     }
 148     else {
 149         return -1;
 150     }
 151     return 0;
 152 }
 153
 154 #else
 155
 156 static char *get_mac_address_win(const char *ip_address)
 157 {
 158         IP_ADAPTER_INFO AdapterInfo[16]; // for up to 16 NICs
 159         DWORD ulOutBufLen = sizeof(AdapterInfo);
 160         PIP_ADAPTER_INFO pAdapter_res = NULL;
 161     PIP_ADAPTER_INFO pAdapter = NULL;
 162     DWORD dwRetVal = 0;
 163     UINT i;
 164         char *res = NULL;
 165
 166         if ((dwRetVal = GetAdaptersInfo(AdapterInfo, &ulOutBufLen)) == NO_ERROR) {
 167                 pAdapter = AdapterInfo;
 168                 pAdapter_res = pAdapter;
 169                 while (pAdapter) {
 170                         if (!g_ascii_strcasecmp(pAdapter->IpAddressList.IpAddress.String, ip_address)) {
 171                                 pAdapter_res = pAdapter;
 172                                 break;
 173                         }
 174                         pAdapter = pAdapter->Next;
 175                 }
 176         } else {
 177                 printf("GetAdaptersInfo failed with error: %d\n", dwRetVal);
 178         }
 179
 180         if (pAdapter_res) {
 181                 gchar nmac[13];
 182                 for (i = 0; i < pAdapter_res->AddressLength; i++) {
 183                         g_sprintf(&nmac[(i*2)], "%02X", (int)pAdapter_res->Address[i]);
 184                 }
 185                 printf("NIC: %s, IP Address: %s, MAC Addres: %s\n", pAdapter_res->Description, pAdapter_res->IpAddressList.IpAddress.String, nmac);
 186                 res = g_strdup(nmac);
 187         } else {
 188                 res = g_strdup("01010101");
 189         }
 190
 191         //@TODO free AdapterInfo
 192         return res;
 193 }
 194 #endif /* _WIN32 */
 195
 196 gchar * sipe_uuid_get_macaddr(const char *ip_address)
 197 {
 198 #ifndef _WIN32
 199         guchar addr[6];
 200         long mac_add = mac_addr_sys(addr);
 201         gchar nmac[13];
 202
 203         if (mac_add == 0){
 204                 int i,j;
 205                 for (i = 0,j=0; i < 6; i++,j+=2) {
 206                         g_sprintf(&nmac[j], "%02X", addr[i]);
 207                 }
 208                 return g_strdup(nmac);
 209         }
 210         return g_strdup_printf("01010101");  //Default
 211 #else
 212         return get_mac_address_win(ip_address);
 213 #endif /* _WIN32 */
 214 }