/mandos/release

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Viewing changes to plugins.d/mandos-client.c

  • Committer: Teddy Hogeborn
  • Date: 2016-03-19 04:26:32 UTC
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 341.
  • Revision ID: teddy@recompile.se-20160319042632-cmmhptyfmj24sbj0
Client: Make plugin helper directory in initramfs image mode u=rwx,go=

Make the plugin helper directory was secure in the initramfs image
just as it is in the normal file system.

* initramfs-tools-hook: Install plugin-helper directory into initramfs
  image as mode u=rwx.

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Lines of Context:
plugins.d/mandos-client.c
9
9
 * "browse_callback", and parts of "main".
10
10
 * 
11
11
 * Everything else is
12
 
 * Copyright © 2008-2018 Teddy Hogeborn
13
 
 * Copyright © 2008-2018 Björn Påhlsson
14
 
 * 
15
 
 * This file is part of Mandos.
16
 
 * 
17
 
 * Mandos is free software: you can redistribute it and/or modify it
18
 
 * under the terms of the GNU General Public License as published by
19
 
 * the Free Software Foundation, either version 3 of the License, or
20
 
 * (at your option) any later version.
21
 
 * 
22
 
 * Mandos is distributed in the hope that it will be useful, but
 
12
 * Copyright © 2008-2016 Teddy Hogeborn
 
13
 * Copyright © 2008-2016 Björn Påhlsson
 
14
 * 
 
15
 * This program is free software: you can redistribute it and/or
 
16
 * modify it under the terms of the GNU General Public License as
 
17
 * published by the Free Software Foundation, either version 3 of the
 
18
 * License, or (at your option) any later version.
 
19
 * 
 
20
 * This program is distributed in the hope that it will be useful, but
23
21
 * WITHOUT ANY WARRANTY; without even the implied warranty of
24
22
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
25
23
 * General Public License for more details.
26
24
 * 
27
25
 * You should have received a copy of the GNU General Public License
28
 
 * along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
26
 * along with this program.  If not, see
 
27
 * <http://www.gnu.org/licenses/>.
29
28
 * 
30
29
 * Contact the authors at <mandos@recompile.se>.
31
30
 */
48
47
                                   strtof(), abort() */
49
48
#include <stdbool.h>            /* bool, false, true */
50
49
#include <string.h>             /* strcmp(), strlen(), strerror(),
51
 
                                   asprintf(), strncpy(), strsignal()
52
 
                                */
 
50
                                   asprintf(), strncpy() */
53
51
#include <sys/ioctl.h>          /* ioctl */
54
52
#include <sys/types.h>          /* socket(), inet_pton(), sockaddr,
55
53
                                   sockaddr_in6, PF_INET6,
627
625
                     safer_gnutls_strerror(ret));
628
626
        dhparamsfilename = NULL;
629
627
      }
630
 
      free(params.data);
631
628
    } while(false);
632
629
  }
633
630
  if(dhparamsfilename == NULL){
1080
1077
    bool match = false;
1081
1078
    {
1082
1079
      char *interface = NULL;
1083
 
      while((interface = argz_next(mc->interfaces,
1084
 
                                   mc->interfaces_size,
1085
 
                                   interface))){
 
1080
      while((interface=argz_next(mc->interfaces, mc->interfaces_size,
 
1081
                                 interface))){
1086
1082
        if(if_nametoindex(interface) == (unsigned int)if_index){
1087
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          match = true;
1088
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          break;
1241
1237
           with an explicit route added with the server's address.
1242
1238
           
1243
1239
           Avahi bug reference:
1244
 
           https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
 
1240
           http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1245
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           https://bugs.debian.org/587961
1246
1242
        */
1247
1243
        if(debug){
1427
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                                               &decrypted_buffer, mc);
1428
1424
    if(decrypted_buffer_size >= 0){
1429
1425
      
1430
 
      clearerr(stdout);
1431
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      written = 0;
1432
1427
      while(written < (size_t) decrypted_buffer_size){
1433
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        if(quit_now){
1449
1444
        }
1450
1445
        written += (size_t)ret;
1451
1446
      }
1452
 
      ret = fflush(stdout);
1453
 
      if(ret != 0){
1454
 
        int e = errno;
1455
 
        if(debug){
1456
 
          fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1457
 
                       strerror(errno));
1458
 
        }
1459
 
        errno = e;
1460
 
        goto mandos_end;
1461
 
      }
1462
1447
      retval = 0;
1463
1448
    }
1464
1449
  }
1495
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  return retval;
1496
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}
1497
1482
 
 
1483
__attribute__((nonnull))
1498
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static void resolve_callback(AvahiSServiceResolver *r,
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                             AvahiIfIndex interface,
1500
1486
                             AvahiProtocol proto,
1923
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      return;
1924
1910
    }
1925
1911
  }
1926
 
  int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
 
  if(devnull == -1){
1928
 
    perror_plus("open(\"/dev/null\", O_RDONLY)");
1929
 
    return;
1930
 
  }
1931
1912
  int numhooks = scandirat(hookdir_fd, ".", &direntries,
1932
1913
                           runnable_hook, alphasort);
1933
1914
  if(numhooks == -1){
1934
1915
    perror_plus("scandir");
1935
 
    close(devnull);
1936
1916
    return;
1937
1917
  }
1938
1918
  struct dirent *direntry;
1939
1919
  int ret;
 
1920
  int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
 
1921
  if(devnull == -1){
 
1922
    perror_plus("open(\"/dev/null\", O_RDONLY)");
 
1923
    return;
 
1924
  }
1940
1925
  for(int i = 0; i < numhooks; i++){
1941
1926
    direntry = direntries[i];
1942
1927
    if(debug){
2198
2183
  
2199
2184
  /* Sleep checking until interface is running.
2200
2185
     Check every 0.25s, up to total time of delay */
2201
 
  for(int i = 0; i < delay * 4; i++){
 
2186
  for(int i=0; i < delay * 4; i++){
2202
2187
    if(interface_is_running(interface)){
2203
2188
      break;
2204
2189
    }
2500
2485
  
2501
2486
  {
2502
2487
    /* Work around Debian bug #633582:
2503
 
       <https://bugs.debian.org/633582> */
 
2488
       <http://bugs.debian.org/633582> */
2504
2489
    
2505
2490
    /* Re-raise privileges */
2506
2491
    ret = raise_privileges();
2961
2946
 end:
2962
2947
  
2963
2948
  if(debug){
2964
 
    if(signal_received){
2965
 
      fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2966
 
                   argv[0], signal_received,
2967
 
                   strsignal(signal_received));
2968
 
    } else {
2969
 
      fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
 
    }
 
2949
    fprintf_plus(stderr, "%s exiting\n", argv[0]);
2971
2950
  }
2972
2951
  
2973
2952
  /* Cleanup things */
3025
3004
      /* Take down the network interfaces which were brought up */
3026
3005
      {
3027
3006
        char *interface = NULL;
3028
 
        while((interface = argz_next(interfaces_to_take_down,
3029
 
                                     interfaces_to_take_down_size,
3030
 
                                     interface))){
 
3007
        while((interface=argz_next(interfaces_to_take_down,
 
3008
                                   interfaces_to_take_down_size,
 
3009
                                   interface))){
3031
3010
          ret = take_down_interface(interface);
3032
3011
          if(ret != 0){
3033
3012
            errno = ret;
3062
3041
                                                | O_PATH));
3063
3042
    if(dir_fd == -1){
3064
3043
      perror_plus("open");
3065
 
      return;
3066
3044
    }
3067
3045
    int numentries = scandirat(dir_fd, ".", &direntries,
3068
3046
                               notdotentries, alphasort);
3085
3063
            clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3086
3064
            dret = 0;
3087
3065
          }
3088
 
          if((dret == -1) and (errno != ENOENT)){
 
3066
          if(dret == -1){
3089
3067
            fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3090
3068
                         direntries[i]->d_name, strerror(errno));
3091
3069
          }
3095
3073
      
3096
3074
      /* need to clean even if 0 because man page doesn't specify */
3097
3075
      free(direntries);
 
3076
      if(numentries == -1){
 
3077
        perror_plus("scandirat");
 
3078
      }
3098
3079
      dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
3080
      if(dret == -1 and errno != ENOENT){
3100
3081
        perror_plus("rmdir");