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 <net/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 <glib/gprintf.h>
  45 #include "uuid.h"
  46
  47 static const char *epid_ns_uuid = "fcacfb03-8a73-46ef-91b1-e5ebeeaba4fe";
  48
  49 #define UUID_OFFSET_TO_LAST_SEGMENT 24
  50
  51 void readUUID(const char *string, sipe_uuid_t *uuid)
  52 {
  53         int i;
  54         sscanf(string, "%08x-%04hx-%04hx-%02hhx%02hhx-", &uuid->time_low
  55                         , &uuid->time_mid, &uuid->time_hi_and_version
  56                         , &uuid->clock_seq_hi_and_reserved
  57                         , &uuid->clock_seq_low );
  58
  59         for(i=0;i<6;i++)
  60         {
  61                 sscanf(&string[UUID_OFFSET_TO_LAST_SEGMENT+i*2], "%02hhx", &uuid->node[i]);
  62         }
  63 }
  64
  65 void printUUID(sipe_uuid_t *uuid, char *string)
  66 {
  67         int i;
  68         size_t pos;
  69         sprintf(string, "%08x-%04x-%04x-%02x%02x-", uuid->time_low
  70                         , uuid->time_mid, uuid->time_hi_and_version
  71                         , uuid->clock_seq_hi_and_reserved
  72                         , uuid->clock_seq_low
  73                         );
  74         pos = strlen(string);
  75         for(i=0;i<6;i++)
  76         {
  77                 pos += sprintf(&string[pos], "%02x", uuid->node[i]);
  78         }
  79 }
  80
  81 void createUUIDfromHash(sipe_uuid_t *uuid, const unsigned char *hash)
  82 {
  83         memcpy(uuid, hash, sizeof(sipe_uuid_t));
  84         uuid->time_hi_and_version &= 0x0FFF;
  85         uuid->time_hi_and_version |= 0x5000;
  86         uuid->clock_seq_hi_and_reserved &= 0x3F;
  87         uuid->clock_seq_hi_and_reserved |= 0x80;
  88 }
  89
  90 char *generateUUIDfromEPID(const gchar *epid)
  91 {
  92         sipe_uuid_t result;
  93         PurpleCipherContext *ctx;
  94         unsigned char hash[20];
  95         char buf[512];
  96
  97         readUUID(epid_ns_uuid, &result);
  98         memcpy(buf, &result, sizeof(sipe_uuid_t));
  99         strcpy(&buf[sizeof(sipe_uuid_t)], epid);
 100
 101         ctx = purple_cipher_context_new_by_name("sha1", NULL);
 102         purple_cipher_context_append(ctx, (guchar *) buf, strlen(buf));
 103         purple_cipher_context_digest(ctx, sizeof(hash), hash, NULL);
 104         purple_cipher_context_destroy(ctx);
 105
 106         createUUIDfromHash(&result, hash);
 107         printUUID(&result, buf);
 108         return g_strdup(buf);
 109 }
 110
 111 #ifndef _WIN32
 112 long mac_addr_sys (const unsigned char *addr)
 113 {
 114 /* implementation for Linux */
 115     struct ifreq ifr;
 116     struct ifreq *IFR;
 117     struct ifconf ifc;
 118     char buf[1024];
 119     int s, i;
 120     int ok = 0;
 121
 122     s = socket(AF_INET, SOCK_DGRAM, 0);
 123     if (s==-1) {
 124         return -1;
 125     }
 126
 127     ifc.ifc_len = sizeof(buf);
 128     ifc.ifc_buf = buf;
 129     ioctl(s, SIOCGIFCONF, &ifc);
 130
 131     IFR = ifc.ifc_req;
 132     for (i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; IFR++) {
 133
 134         strcpy(ifr.ifr_name, IFR->ifr_name);
 135         if (ioctl(s, SIOCGIFFLAGS, &ifr) == 0) {
 136             if (! (ifr.ifr_flags & IFF_LOOPBACK)) {
 137 #ifdef __FreeBSD__
 138                 if (ioctl(s, SIOCGIFMAC, &ifr) == 0) {
 139 #else
 140                 if (ioctl(s, SIOCGIFHWADDR, &ifr) == 0) {
 141 #endif
 142                     ok = 1;
 143                     break;
 144                 }
 145             }
 146         }
 147     }
 148
 149     close(s);
 150     if (ok) {
 151         memmove((void *)addr, ifr.ifr_ifru.ifru_addr.sa_data, 6);
 152     }
 153     else {
 154         return -1;
 155     }
 156     return 0;
 157 }
 158
 159 #else
 160
 161 static char *get_mac_address_win(const char *ip_address)
 162 {
 163         IP_ADAPTER_INFO AdapterInfo[16]; // for up to 16 NICs
 164         DWORD ulOutBufLen = sizeof(AdapterInfo);
 165         PIP_ADAPTER_INFO pAdapter_res = NULL;
 166     PIP_ADAPTER_INFO pAdapter = NULL;
 167     DWORD dwRetVal = 0;
 168     UINT i;
 169         char *res = NULL;
 170
 171         if ((dwRetVal = GetAdaptersInfo(AdapterInfo, &ulOutBufLen)) == NO_ERROR) {
 172                 pAdapter = AdapterInfo;
 173                 pAdapter_res = pAdapter;
 174                 while (pAdapter) {
 175                         if (!g_ascii_strcasecmp(pAdapter->IpAddressList.IpAddress.String, ip_address)) {
 176                                 pAdapter_res = pAdapter;
 177                                 break;
 178                         }
 179                         pAdapter = pAdapter->Next;
 180                 }
 181         } else {
 182                 printf("GetAdaptersInfo failed with error: %d\n", dwRetVal);
 183         }
 184
 185         if (pAdapter_res && pAdapter_res->AddressLength) {
 186                 gchar nmac[13];
 187                 for (i = 0; i < pAdapter_res->AddressLength; i++) {
 188                         g_sprintf(&nmac[(i*2)], "%02X", (int)pAdapter_res->Address[i]);
 189                 }
 190                 res = g_strndup(nmac, pAdapter_res->AddressLength * 2);
 191                 printf("NIC: %s, IP Address: %s, MAC Address: %s\n", pAdapter_res->Description, pAdapter_res->IpAddressList.IpAddress.String, res);
 192         } else {
 193                 res = g_strdup("01010101");
 194         }
 195
 196         //@TODO free AdapterInfo
 197         return res;
 198 }
 199 #endif /* _WIN32 */
 200
 201 gchar * sipe_uuid_get_macaddr(const char *ip_address)
 202 {
 203 #ifndef _WIN32
 204         guchar addr[6];
 205         long mac_add = mac_addr_sys(addr);
 206         gchar nmac[13];
 207
 208         if (mac_add == 0){
 209                 int i,j;
 210                 for (i = 0,j=0; i < 6; i++,j+=2) {
 211                         g_sprintf(&nmac[j], "%02X", addr[i]);
 212                 }
 213                 return g_strdup(nmac);
 214         }
 215         return g_strdup("01010101");  //Default
 216 #else
 217         return get_mac_address_win(ip_address);
 218 #endif /* _WIN32 */
 219 }