108
101
/* Create a new plugin */
109
102
plugin *new_plugin = malloc(sizeof(plugin));
110
103
if (new_plugin == NULL){
113
char *copy_name = NULL;
115
copy_name = strdup(name);
116
if(copy_name == NULL){
121
*new_plugin = (plugin) { .name = copy_name,
124
.next = plugin_list };
107
new_plugin->name = name;
126
108
new_plugin->argv = malloc(sizeof(char *) * 2);
127
109
if (new_plugin->argv == NULL){
132
new_plugin->argv[0] = copy_name;
113
new_plugin->argv[0] = name;
133
114
new_plugin->argv[1] = NULL;
135
new_plugin->environ = malloc(sizeof(char *));
136
if(new_plugin->environ == NULL){
138
free(new_plugin->argv);
142
new_plugin->environ[0] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
144
118
/* Append the new plugin to the list */
145
plugin_list = new_plugin;
119
*plugin_list = new_plugin;
146
120
return new_plugin;
149
/* Helper function for add_argument and add_environment */
150
static bool add_to_char_array(const char *new, char ***array,
152
/* Resize the pointed-to array to hold one more pointer */
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
159
/* Make a copy of the new string */
160
char *copy = strdup(new);
164
/* Insert the copy */
165
(*array)[*len] = copy;
167
/* Add a new terminating NULL pointer to the last element */
168
(*array)[*len] = NULL;
172
/* Add to a plugin's argument vector */
173
static bool add_argument(plugin *p, const char *arg){
177
return add_to_char_array(arg, &(p->argv), &(p->argc));
180
/* Add to a plugin's environment */
181
static bool add_environment(plugin *p, const char *def, bool replace){
185
/* namelen = length of name of environment variable */
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
190
/* It already exists */
192
char *new = realloc(*e, strlen(def) + 1);
202
return add_to_char_array(def, &(p->environ), &(p->envc));
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
131
p->argv[p->argc] = NULL;
340
221
{ .name = "global-options", .key = 'g',
341
222
.arg = "OPTION[,OPTION[,...]]",
342
223
.doc = "Options passed to all plugins" },
343
{ .name = "global-env", .key = 'G',
345
.doc = "Environment variable passed to all plugins" },
346
224
{ .name = "options-for", .key = 'o',
347
225
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
348
226
.doc = "Options passed only to specified plugin" },
349
{ .name = "env-for", .key = 'E',
350
.arg = "PLUGIN:ENV=value",
351
.doc = "Environment variable passed to specified plugin" },
352
227
{ .name = "disable", .key = 'd',
354
229
.doc = "Disable a specific plugin", .group = 1 },
355
{ .name = "enable", .key = 'e',
357
.doc = "Enable a specific plugin", .group = 1 },
358
230
{ .name = "plugin-dir", .key = 128,
359
231
.arg = "DIRECTORY",
360
232
.doc = "Specify a different plugin directory", .group = 2 },
361
{ .name = "config-file", .key = 129,
363
.doc = "Specify a different configuration file", .group = 2 },
364
{ .name = "userid", .key = 130,
365
.arg = "ID", .flags = 0,
366
.doc = "User ID the plugins will run as", .group = 3 },
367
{ .name = "groupid", .key = 131,
368
.arg = "ID", .flags = 0,
369
.doc = "Group ID the plugins will run as", .group = 3 },
370
{ .name = "debug", .key = 132,
371
.doc = "Debug mode", .group = 4 },
233
{ .name = "userid", .key = 129,
234
.arg = "ID", .flags = 0,
235
.doc = "User ID the plugins will run as", .group = 2 },
236
{ .name = "groupid", .key = 130,
237
.arg = "ID", .flags = 0,
238
.doc = "Group ID the plugins will run as", .group = 2 },
239
{ .name = "debug", .key = 131,
240
.doc = "Debug mode", .group = 3 },
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
244
error_t parse_opt (int key, char *arg, struct argp_state *state) {
245
/* Get the INPUT argument from `argp_parse', which we know is a
246
pointer to our plugin list pointer. */
247
plugin **plugins = state->input;
378
case 'g': /* --global-options */
381
while((p = strsep(&arg, ",")) != NULL){
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
392
case 'G': /* --global-env */
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
400
case 'o': /* --options-for */
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
411
while((p = strsep(&opt, ",")) != NULL){
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
422
case 'E': /* --env-for */
427
char *envdef = strchr(arg, ':');
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
437
case 'd': /* --disable */
439
plugin *p = getplugin(arg);
441
return ARGP_ERR_UNKNOWN;
446
case 'e': /* --enable */
448
plugin *p = getplugin(arg);
450
return ARGP_ERR_UNKNOWN;
455
case 128: /* --plugin-dir */
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
462
case 129: /* --config-file */
463
/* This is already done by parse_opt_config_file() */
465
case 130: /* --userid */
251
char *p = strtok(arg, ",");
253
addargument(getplugin(NULL, plugins), p);
254
p = strtok(NULL, ",");
260
char *name = strtok(arg, ":");
261
char *p = strtok(NULL, ":");
265
addargument(getplugin(name, plugins), p);
266
p = strtok(NULL, ",");
273
getplugin(arg, plugins)->disabled = true;
466
280
uid = (uid_t)strtol(arg, NULL, 10);
468
case 131: /* --groupid */
469
283
gid = (gid_t)strtol(arg, NULL, 10);
471
case 132: /* --debug */
474
288
case ARGP_KEY_ARG:
475
/* Cryptsetup always passes an argument, which is an empty
476
string if "none" was specified in /etc/crypttab. So if
477
argument was empty, we ignore it silently. */
479
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
485
return ARGP_ERR_UNKNOWN;
490
/* This option parser is the same as parse_opt() above, except it
491
ignores everything but the --config-file option. */
492
error_t parse_opt_config_file (int key, char *arg,
493
__attribute__((unused))
494
struct argp_state *state) {
496
case 'g': /* --global-options */
497
case 'G': /* --global-env */
498
case 'o': /* --options-for */
499
case 'E': /* --env-for */
500
case 'd': /* --disable */
501
case 'e': /* --enable */
502
case 128: /* --plugin-dir */
504
case 129: /* --config-file */
506
argfile = strdup(arg);
511
case 130: /* --userid */
512
case 131: /* --groupid */
513
case 132: /* --debug */
518
return ARGP_ERR_UNKNOWN;
523
struct argp argp = { .options = options,
524
.parser = parse_opt_config_file,
289
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
297
return ARGP_ERR_UNKNOWN;
302
plugin *plugin_list = NULL;
304
struct argp argp = { .options = options, .parser = parse_opt,
305
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
526
306
.doc = "Mandos plugin runner -- Run plugins" };
528
/* Parse using the parse_opt_config_file in order to get the custom
529
config file location, if any. */
530
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
308
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
531
309
if (ret == ARGP_ERR_UNKNOWN){
532
310
fprintf(stderr, "Unknown error while parsing arguments\n");
533
311
exitstatus = EXIT_FAILURE;
537
/* Reset to the normal argument parser */
538
argp.parser = parse_opt;
540
/* Open the configfile if available */
541
if (argfile == NULL){
542
conffp = fopen(AFILE, "r");
544
conffp = fopen(argfile, "r");
547
char *org_line = NULL;
548
char *p, *arg, *new_arg, *line;
550
const char whitespace_delims[] = " \r\t\f\v\n";
551
const char comment_delim[] = "#";
554
custom_argv = malloc(sizeof(char*) * 2);
555
if(custom_argv == NULL){
316
/* This is a mangled argument in the form of
317
"+--option+--other-option=parameter+--yet-another-option", etc */
318
/* Make new argc and argv vars, and call argp_parse() again. */
319
plus_options++; /* skip the first '+' character */
320
const char delims[] = "+";
323
plus_argv = malloc(sizeof(char*) * 2);
324
if(plus_argv == NULL){
556
325
perror("malloc");
557
326
exitstatus = EXIT_FAILURE;
560
custom_argv[0] = argv[0];
561
custom_argv[1] = NULL;
563
/* for each line in the config file, strip whitespace and ignore
566
sret = getline(&org_line, &size, conffp);
572
arg = strsep(&line, comment_delim);
573
while((p = strsep(&arg, whitespace_delims)) != NULL){
580
exitstatus = EXIT_FAILURE;
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
590
exitstatus = EXIT_FAILURE;
594
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
600
/* Check for harmful errors and go to fallback. Other errors might
601
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
exitstatus = EXIT_FAILURE;
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
610
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
329
plus_argv[0] = argv[0];
331
arg = strtok(plus_options, delims); /* Get first argument */
334
plus_argv = realloc(plus_argv, sizeof(char *)
335
* ((unsigned int) new_argc + 1));
336
if(plus_argv == NULL){
338
exitstatus = EXIT_FAILURE;
341
plus_argv[new_argc-1] = arg;
342
plus_argv[new_argc] = NULL;
343
arg = strtok(NULL, delims); /* Get next argument */
345
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
613
346
if (ret == ARGP_ERR_UNKNOWN){
614
347
fprintf(stderr, "Unknown error while parsing arguments\n");
615
348
exitstatus = EXIT_FAILURE;
620
/* Parse actual command line arguments, to let them override the
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
630
354
for(plugin *p = plugin_list; p != NULL; p=p->next){
631
355
fprintf(stderr, "Plugin: %s has %d arguments\n",
865
545
above and must now close it manually here. */
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
874
if(execve(filename, p->argv, p->environ) < 0){
548
if(execv(filename, p->argv) < 0){
882
close(pipefd[1]); /* Close unused write end of pipe */
884
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
556
close(pipefd[1]); /* close unused write end of pipe */
557
process *new_process = malloc(sizeof(process));
558
if (new_process == NULL){
887
560
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
perror("sigprocmask");
562
perror("sigprocmask");
891
564
exitstatus = EXIT_FAILURE;
895
new_plugin->pid = pid;
896
new_plugin->fd = pipefd[0];
568
*new_process = (struct process){ .pid = pid,
570
.next = process_list };
572
process_list = new_process;
898
573
/* Unblock SIGCHLD so signal handler can be run if this process
899
574
has already completed */
900
575
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
902
577
perror("sigprocmask");
903
578
exitstatus = EXIT_FAILURE;
907
FD_SET(new_plugin->fd, &rfds_all);
909
if (maxfd < new_plugin->fd){
910
maxfd = new_plugin->fd;
582
FD_SET(new_process->fd, &rfds_all);
584
if (maxfd < new_process->fd){
585
maxfd = new_process->fd;
590
/* Free the plugin list */
591
for(plugin *next; plugin_list != NULL; plugin_list = next){
592
next = plugin_list->next;
593
free(plugin_list->argv);
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
922
fprintf(stderr, "No plugin processes started. Incorrect plugin"
600
if (process_list == NULL){
601
fprintf(stderr, "No plugin processes started. Incorrect plugin"
928
/* Main loop while running plugins exist */
930
606
fd_set rfds = rfds_all;
931
607
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
932
608
if (select_ret == -1){
933
609
perror("select");
934
610
exitstatus = EXIT_FAILURE;
937
613
/* OK, now either a process completed, or something can be read
938
614
from one of them */
939
for(plugin *proc = plugin_list; proc != NULL;){
615
for(process *proc = process_list; proc ; proc = proc->next){
940
616
/* Is this process completely done? */
941
617
if(proc->eof and proc->completed){
942
618
/* Only accept the plugin output if it exited cleanly */
943
619
if(not WIFEXITED(proc->status)
944
620
or WEXITSTATUS(proc->status) != 0){
945
621
/* Bad exit by plugin */
948
623
if(WIFEXITED(proc->status)){
949
624
fprintf(stderr, "Plugin %u exited with status %d\n",
1014
689
if (proc->buffer == NULL){
1015
690
perror("malloc");
1016
691
exitstatus = EXIT_FAILURE;
1019
694
proc->buffer_size += BUFFER_SIZE;
1021
696
/* Read from the process */
1022
sret = read(proc->fd, proc->buffer + proc->buffer_length,
697
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1025
700
/* Read error from this process; ignore the error */
1031
705
proc->eof = true;
1033
proc->buffer_length += (size_t) sret;
707
proc->buffer_length += (size_t) ret;
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1042
/* Fallback if all plugins failed, none are found or an error
712
if(process_list == NULL){
1045
714
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1046
715
char *passwordbuffer = getpass("Password: ");
1047
size_t len = strlen(passwordbuffer);
1048
/* Strip trailing newline */
1049
if(len > 0 and passwordbuffer[len-1] == '\n'){
1050
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1053
bret = print_out_password(passwordbuffer, len);
716
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1055
718
perror("print_out_password");
1056
719
exitstatus = EXIT_FAILURE;
1060
726
/* Restore old signal handler */
1061
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1067
if(custom_argv != NULL){
1068
for(char **arg = custom_argv+1; *arg != NULL; arg++){
727
sigaction(SIGCHLD, &old_sigchld_action, NULL);
731
/* Free the plugin list */
732
for(plugin *next; plugin_list != NULL; plugin_list = next){
733
next = plugin_list->next;
734
free(plugin_list->argv);
1074
738
if(dir != NULL){
1078
/* Kill the processes */
1079
for(plugin *p = plugin_list; p != NULL; p = p->next){
1082
ret = kill(p->pid, SIGTERM);
1083
if(ret == -1 and errno != ESRCH){
1084
/* Set-uid proccesses might not get closed */
742
/* Free the process list and kill the processes */
743
for(process *next; process_list != NULL; process_list = next){
744
next = process_list->next;
745
close(process_list->fd);
746
ret = kill(process_list->pid, SIGTERM);
747
if(ret == -1 and errno != ESRCH){
748
/* set-uid proccesses migth not get closed */
751
free(process_list->buffer);
1090
755
/* Wait for any remaining child processes to terminate */