85
/* Variables used for running processes*/
92
volatile sig_atomic_t completed;
93
94
struct plugin *next;
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
99
or (p->name and name and (strcmp(p->name, name) == 0))){
97
static plugin *plugin_list = NULL;
99
/* Gets an existing plugin based on name,
100
or if none is found, creates a new one */
101
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
105
or (p->name and name and (strcmp(p->name, name) == 0))){
103
109
/* Create a new plugin */
104
110
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
111
if(new_plugin == NULL){
108
*new_plugin = (plugin) { .name = name,
112
.next = *plugin_list };
114
char *copy_name = NULL;
116
copy_name = strdup(name);
117
if(copy_name == NULL){
123
*new_plugin = (plugin){ .name = copy_name,
126
.next = plugin_list };
114
128
new_plugin->argv = malloc(sizeof(char *) * 2);
115
if (new_plugin->argv == NULL){
129
if(new_plugin->argv == NULL){
116
131
free(new_plugin);
119
new_plugin->argv[0] = name;
134
new_plugin->argv[0] = copy_name;
120
135
new_plugin->argv[1] = NULL;
122
137
new_plugin->environ = malloc(sizeof(char *));
123
138
if(new_plugin->environ == NULL){
124
140
free(new_plugin->argv);
125
141
free(new_plugin);
128
144
new_plugin->environ[0] = NULL;
129
146
/* Append the new plugin to the list */
130
*plugin_list = new_plugin;
147
plugin_list = new_plugin;
131
148
return new_plugin;
284
345
{ .name = "global-options", .key = 'g',
285
346
.arg = "OPTION[,OPTION[,...]]",
286
347
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
348
{ .name = "global-env", .key = 'G',
288
349
.arg = "VAR=value",
289
350
.doc = "Environment variable passed to all plugins" },
290
351
{ .name = "options-for", .key = 'o',
291
352
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
353
.doc = "Options passed only to specified plugin" },
293
{ .name = "envs-for", .key = 'f',
354
{ .name = "env-for", .key = 'E',
294
355
.arg = "PLUGIN:ENV=value",
295
356
.doc = "Environment variable passed to specified plugin" },
296
357
{ .name = "disable", .key = 'd',
298
359
.doc = "Disable a specific plugin", .group = 1 },
360
{ .name = "enable", .key = 'e',
362
.doc = "Enable a specific plugin", .group = 1 },
299
363
{ .name = "plugin-dir", .key = 128,
300
364
.arg = "DIRECTORY",
301
365
.doc = "Specify a different plugin directory", .group = 2 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
366
{ .name = "config-file", .key = 129,
368
.doc = "Specify a different configuration file", .group = 2 },
369
{ .name = "userid", .key = 130,
370
.arg = "ID", .flags = 0,
371
.doc = "User ID the plugins will run as", .group = 3 },
372
{ .name = "groupid", .key = 131,
373
.arg = "ID", .flags = 0,
374
.doc = "Group ID the plugins will run as", .group = 3 },
375
{ .name = "debug", .key = 132,
376
.doc = "Debug mode", .group = 4 },
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
383
case 'g': /* --global-options */
321
386
while((p = strsep(&arg, ",")) != NULL){
322
387
if(p[0] == '\0'){
325
if(not add_argument(getplugin(NULL, plugins), p)){
390
if(not add_argument(getplugin(NULL), p)){
326
391
perror("add_argument");
327
392
return ARGP_ERR_UNKNOWN;
397
case 'G': /* --global-env */
337
char *envdef = strdup(arg);
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
401
if(not add_environment(getplugin(NULL), arg, true)){
402
perror("add_environment");
405
case 'o': /* --options-for */
348
407
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
408
if(p_name[0] == '\0' or arg == NULL){
352
411
char *opt = strsep(&arg, ":");
412
if(opt[0] == '\0' or opt == NULL){
358
while((p = strsep(&opt, ",")) != NULL){
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
416
while((p = strsep(&opt, ",")) != NULL){
420
if(not add_argument(getplugin(p_name), p)){
421
perror("add_argument");
422
return ARGP_ERR_UNKNOWN;
427
case 'E': /* --env-for */
376
433
if(envdef == NULL){
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
437
if(not add_environment(getplugin(arg), envdef+1, true)){
385
438
perror("add_environment");
391
plugin *p = getplugin(arg, plugins);
442
case 'd': /* --disable */
444
plugin *p = getplugin(arg);
393
446
return ARGP_ERR_UNKNOWN;
395
448
p->disabled = true;
402
uid = (uid_t)strtol(arg, NULL, 10);
405
gid = (gid_t)strtol(arg, NULL, 10);
451
case 'e': /* --enable */
453
plugin *p = getplugin(arg);
455
return ARGP_ERR_UNKNOWN;
460
case 128: /* --plugin-dir */
462
plugindir = strdup(arg);
463
if(plugindir == NULL){
467
case 129: /* --config-file */
468
/* This is already done by parse_opt_config_file() */
470
case 130: /* --userid */
471
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
472
if(ret < 1 or tmpmax != (uid_t)tmpmax
473
or arg[numchars] != '\0'){
474
fprintf(stderr, "Bad user ID number: \"%s\", using %"
475
PRIdMAX "\n", arg, (intmax_t)uid);
480
case 131: /* --groupid */
481
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
482
if(ret < 1 or tmpmax != (gid_t)tmpmax
483
or arg[numchars] != '\0'){
484
fprintf(stderr, "Bad group ID number: \"%s\", using %"
485
PRIdMAX "\n", arg, (intmax_t)gid);
490
case 132: /* --debug */
411
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
416
return ARGP_ERR_UNKNOWN;
421
plugin *plugin_list = NULL;
423
struct argp argp = { .options = options, .parser = parse_opt,
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
494
* When adding more options before this line, remember to also add a
495
* "case" to the "parse_opt_config_file" function below.
498
/* Cryptsetup always passes an argument, which is an empty
499
string if "none" was specified in /etc/crypttab. So if
500
argument was empty, we ignore it silently. */
502
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
508
return ARGP_ERR_UNKNOWN;
513
/* This option parser is the same as parse_opt() above, except it
514
ignores everything but the --config-file option. */
515
error_t parse_opt_config_file(int key, char *arg,
516
__attribute__((unused))
517
struct argp_state *state){
519
case 'g': /* --global-options */
520
case 'G': /* --global-env */
521
case 'o': /* --options-for */
522
case 'E': /* --env-for */
523
case 'd': /* --disable */
524
case 'e': /* --enable */
525
case 128: /* --plugin-dir */
527
case 129: /* --config-file */
529
argfile = strdup(arg);
534
case 130: /* --userid */
535
case 131: /* --groupid */
536
case 132: /* --debug */
541
return ARGP_ERR_UNKNOWN;
546
struct argp argp = { .options = options,
547
.parser = parse_opt_config_file,
425
549
.doc = "Mandos plugin runner -- Run plugins" };
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
428
if (ret == ARGP_ERR_UNKNOWN){
551
/* Parse using parse_opt_config_file() in order to get the custom
552
config file location, if any. */
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
429
555
fprintf(stderr, "Unknown error while parsing arguments\n");
430
556
exitstatus = EXIT_FAILURE;
434
conffp = fopen(argfile, "r");
560
/* Reset to the normal argument parser */
561
argp.parser = parse_opt;
563
/* Open the configfile if available */
565
conffp = fopen(AFILE, "r");
567
conffp = fopen(argfile, "r");
435
569
if(conffp != NULL){
436
570
char *org_line = NULL;
571
char *p, *arg, *new_arg, *line;
439
char *p, *arg, *new_arg, *line;
440
573
const char whitespace_delims[] = " \r\t\f\v\n";
441
574
const char comment_delim[] = "#";
577
custom_argv = malloc(sizeof(char*) * 2);
578
if(custom_argv == NULL){
580
exitstatus = EXIT_FAILURE;
583
custom_argv[0] = argv[0];
584
custom_argv[1] = NULL;
586
/* for each line in the config file, strip whitespace and ignore
444
589
sret = getline(&org_line, &size, conffp);
455
600
new_arg = strdup(p);
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
603
exitstatus = EXIT_FAILURE;
609
custom_argv = realloc(custom_argv, sizeof(char *)
610
* ((unsigned int) custom_argc + 1));
611
if(custom_argv == NULL){
613
exitstatus = EXIT_FAILURE;
617
custom_argv[custom_argc-1] = new_arg;
618
custom_argv[custom_argc] = NULL;
466
623
/* Check for harmful errors and go to fallback. Other errors might
467
624
not affect opening plugins */
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
470
627
exitstatus = EXIT_FAILURE;
631
/* If there was any arguments from configuration file,
632
pass them to parser as command arguments */
475
633
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
478
if (ret == ARGP_ERR_UNKNOWN){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
636
if(ret == ARGP_ERR_UNKNOWN){
479
637
fprintf(stderr, "Unknown error while parsing arguments\n");
480
638
exitstatus = EXIT_FAILURE;
643
/* Parse actual command line arguments, to let them override the
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
647
fprintf(stderr, "Unknown error while parsing arguments\n");
648
exitstatus = EXIT_FAILURE;
486
653
for(plugin *p = plugin_list; p != NULL; p=p->next){
487
654
fprintf(stderr, "Plugin: %s has %d arguments\n",
905
close(pipefd[1]); /* Close unused write end of pipe */
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
907
plugin *new_plugin = getplugin(dirst->d_name);
908
if(new_plugin == NULL){
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
738
perror("sigprocmask");
912
perror("sigprocmask");
740
914
exitstatus = EXIT_FAILURE;
744
*new_process = (struct process){ .pid = pid,
746
.next = process_list };
748
process_list = new_process;
918
new_plugin->pid = pid;
919
new_plugin->fd = pipefd[0];
749
921
/* Unblock SIGCHLD so signal handler can be run if this process
750
922
has already completed */
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
753
925
perror("sigprocmask");
754
926
exitstatus = EXIT_FAILURE;
758
FD_SET(new_process->fd, &rfds_all);
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
930
FD_SET(new_plugin->fd, &rfds_all);
932
if(maxfd < new_plugin->fd){
933
maxfd = new_plugin->fd;
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
939
free_plugin(getplugin(NULL));
941
for(plugin *p = plugin_list; p != NULL; p = p->next){
946
fprintf(stderr, "No plugin processes started. Incorrect plugin"
952
/* Main loop while running plugins exist */
787
954
fd_set rfds = rfds_all;
788
955
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
if (select_ret == -1){
956
if(select_ret == -1){
790
957
perror("select");
791
958
exitstatus = EXIT_FAILURE;
794
961
/* OK, now either a process completed, or something can be read
795
962
from one of them */
796
for(process *proc = process_list; proc ; proc = proc->next){
963
for(plugin *proc = plugin_list; proc != NULL;){
797
964
/* Is this process completely done? */
798
if(proc->eof and proc->completed){
965
if(proc->completed and proc->eof){
799
966
/* Only accept the plugin output if it exited cleanly */
800
967
if(not WIFEXITED(proc->status)
801
968
or WEXITSTATUS(proc->status) != 0){
802
969
/* Bad exit by plugin */
804
972
if(WIFEXITED(proc->status)){
805
fprintf(stderr, "Plugin %u exited with status %d\n",
806
(unsigned int) (proc->pid),
973
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
974
" %d\n", (intmax_t) (proc->pid),
807
975
WEXITSTATUS(proc->status));
808
} else if(WIFSIGNALED(proc->status)) {
809
fprintf(stderr, "Plugin %u killed by signal %d\n",
810
(unsigned int) (proc->pid),
976
} else if(WIFSIGNALED(proc->status)){
977
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
978
" %d\n", (intmax_t) (proc->pid),
811
979
WTERMSIG(proc->status));
812
980
} else if(WCOREDUMP(proc->status)){
813
fprintf(stderr, "Plugin %d dumped core\n",
814
(unsigned int) (proc->pid));
981
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
982
(intmax_t) (proc->pid));
817
986
/* Remove the plugin */
818
987
FD_CLR(proc->fd, &rfds_all);
819
989
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
990
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
822
992
perror("sigprocmask");
823
993
exitstatus = EXIT_FAILURE;
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
834
p->next = proc->next;
997
plugin *next_plugin = proc->next;
839
1001
/* We are done modifying process list, so unblock signal */
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
843
1005
perror("sigprocmask");
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
1006
exitstatus = EXIT_FAILURE;
1010
if(plugin_list == NULL){
852
1017
/* This process exited nicely, so print its buffer */
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1019
bool bret = print_out_password(proc->buffer,
1020
proc->buffer_length);
856
1022
perror("print_out_password");
857
1023
exitstatus = EXIT_FAILURE;
861
1028
/* This process has not completed. Does it have any output? */
862
1029
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
863
1030
/* This process had nothing to say at this time */
866
1034
/* Before reading, make the process' data buffer large enough */
867
1035
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
868
1036
proc->buffer = realloc(proc->buffer, proc->buffer_size
869
1037
+ (size_t) BUFFER_SIZE);
870
if (proc->buffer == NULL){
1038
if(proc->buffer == NULL){
871
1039
perror("malloc");
872
1040
exitstatus = EXIT_FAILURE;
875
1043
proc->buffer_size += BUFFER_SIZE;
877
1045
/* Read from the process */
878
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
sret = read(proc->fd, proc->buffer + proc->buffer_length,
881
1049
/* Read error from this process; ignore the error */
886
1055
proc->eof = true;
888
proc->buffer_length += (size_t) ret;
1057
proc->buffer_length += (size_t) sret;
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
1065
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1066
/* Fallback if all plugins failed, none are found or an error
899
1069
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
1070
char *passwordbuffer = getpass("Password: ");
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1071
size_t len = strlen(passwordbuffer);
1072
/* Strip trailing newline */
1073
if(len > 0 and passwordbuffer[len-1] == '\n'){
1074
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1077
bret = print_out_password(passwordbuffer, len);
903
1079
perror("print_out_password");
904
1080
exitstatus = EXIT_FAILURE;
909
1084
/* Restore old signal handler */
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
1085
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1087
perror("sigaction");
1088
exitstatus = EXIT_FAILURE;
1091
if(custom_argv != NULL){
1092
for(char **arg = custom_argv+1; *arg != NULL; arg++){
923
free(plugin_list->environ);
927
1098
if(dir != NULL){
931
/* Free the process list and kill the processes */
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
1102
/* Kill the processes */
1103
for(plugin *p = plugin_list; p != NULL; p = p->next){
1106
ret = kill(p->pid, SIGTERM);
1107
if(ret == -1 and errno != ESRCH){
1108
/* Set-uid proccesses might not get closed */
940
free(process_list->buffer);
944
1114
/* Wait for any remaining child processes to terminate */