9
9
* "browse_callback", and parts of "main".
11
11
* Everything else is
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
15
* This file is part of Mandos.
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.
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
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.
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.
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
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* <http://www.gnu.org/licenses/>.
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* Contact the authors at <mandos@recompile.se>.
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strtof(), abort() */
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48
#include <stdbool.h> /* bool, false, true */
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#include <string.h> /* strcmp(), strlen(), strerror(),
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asprintf(), strncpy(), strsignal()
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asprintf(), strncpy() */
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51
#include <sys/ioctl.h> /* ioctl */
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#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
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sockaddr_in6, PF_INET6,
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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
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inet_pton(), connect(),
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#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
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#include <fcntl.h> /* open(), unlinkat() */
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#include <dirent.h> /* opendir(), struct dirent, readdir()
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#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
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#include <errno.h> /* perror(), errno, EINTR, EINVAL,
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EAI_SYSTEM, ENETUNREACH,
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EHOSTUNREACH, ECONNREFUSED, EPROTO,
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EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
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#include <errno.h> /* perror(), errno,
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program_invocation_short_name */
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#include <time.h> /* nanosleep(), time(), sleep() */
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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/* Create new GPGME "context" */
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rc = gpgme_new(&(mc->ctx));
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if(rc != GPG_ERR_NO_ERROR){
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fprintf_plus(stderr, "bad gpgme_new: %s: %s\n",
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gpgme_strsource(rc), gpgme_strerror(rc));
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fprintf_plus(stderr, "Mandos plugin mandos-client: "
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"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
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/* Create new empty GPGME data buffer for the plaintext */
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rc = gpgme_data_new(&dh_plain);
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if(rc != GPG_ERR_NO_ERROR){
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fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
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fprintf_plus(stderr, "Mandos plugin mandos-client: "
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"bad gpgme_data_new: %s: %s\n",
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gpgme_strsource(rc), gpgme_strerror(rc));
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gpgme_data_release(dh_crypto);
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if(result == NULL){
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fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
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if(result->unsupported_algorithm != NULL) {
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fprintf_plus(stderr, "Unsupported algorithm: %s\n",
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result->unsupported_algorithm);
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fprintf_plus(stderr, "Wrong key usage: %s\n",
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result->wrong_key_usage ? "Yes" : "No");
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fprintf_plus(stderr, "Unsupported algorithm: %s\n",
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result->unsupported_algorithm);
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fprintf_plus(stderr, "Wrong key usage: %u\n",
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result->wrong_key_usage);
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if(result->file_name != NULL){
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fprintf_plus(stderr, "File name: %s\n", result->file_name);
519
513
fprintf_plus(stderr, "GnuTLS: %s", string);
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
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__attribute__((nonnull, warn_unused_result))
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static int init_gnutls_global(const char *pubkeyfilename,
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const char *seckeyfilename,
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const char *dhparamsfilename,
531
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fprintf_plus(stderr, "Initializing GnuTLS\n");
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ret = gnutls_global_init();
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if(ret != GNUTLS_E_SUCCESS){
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fprintf_plus(stderr, "GnuTLS global_init: %s\n",
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safer_gnutls_strerror(ret));
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/* "Use a log level over 10 to enable all debugging options."
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* - GnuTLS manual
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/* Set effective uid to 0, return errno */
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__attribute__((warn_unused_result))
827
int raise_privileges(void){
828
int old_errno = errno;
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error_t raise_privileges(void){
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error_t old_errno = errno;
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error_t ret_errno = 0;
830
828
if(seteuid(0) == -1){
833
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errno = old_errno;
837
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/* Set effective and real user ID to 0. Return errno. */
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__attribute__((warn_unused_result))
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int raise_privileges_permanently(void){
840
int old_errno = errno;
841
int ret = raise_privileges();
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error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
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error_t ret_errno = raise_privileges();
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errno = old_errno;
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if(setuid(0) == -1){
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errno = old_errno;
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/* Set effective user ID to unprivileged saved user ID */
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__attribute__((warn_unused_result))
855
int lower_privileges(void){
856
int old_errno = errno;
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error_t lower_privileges(void){
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error_t old_errno = errno;
855
error_t ret_errno = 0;
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if(seteuid(uid) == -1){
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errno = old_errno;
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/* Lower privileges permanently */
866
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__attribute__((warn_unused_result))
867
int lower_privileges_permanently(void){
868
int old_errno = errno;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
870
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if(setuid(uid) == -1){
873
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errno = old_errno;
877
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/* Helper function to add_local_route() and delete_local_route() */
1940
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1942
perror_plus("open(\"/dev/null\", O_RDONLY)");
1945
1917
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1946
1918
runnable_hook, alphasort);
1947
1919
if(numhooks == -1){
1948
1920
perror_plus("scandir");
1952
1923
struct dirent *direntry;
1925
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1927
perror_plus("open(\"/dev/null\", O_RDONLY)");
1954
1930
for(int i = 0; i < numhooks; i++){
1955
1931
direntry = direntries[i];
2495
2469
.args_doc = "",
2496
2470
.doc = "Mandos client -- Get and decrypt"
2497
2471
" passwords from a Mandos server" };
2498
ret_errno = argp_parse(&argp, argc, argv,
2499
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2472
ret = argp_parse(&argp, argc, argv,
2473
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2506
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perror_plus("argp_parse");
2507
2481
exitcode = EX_OSERR;
2926
2900
/* Allocate a new server */
2927
2901
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2928
&config, NULL, NULL, &ret);
2902
&config, NULL, NULL, &ret_errno);
2930
2904
/* Free the Avahi configuration data */
2931
2905
avahi_server_config_free(&config);
2978
if(signal_received){
2979
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2980
argv[0], signal_received,
2981
strsignal(signal_received));
2983
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2952
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2987
2955
/* Cleanup things */
3039
3008
/* Take down the network interfaces which were brought up */
3041
3010
char *interface = NULL;
3042
while((interface = argz_next(interfaces_to_take_down,
3043
interfaces_to_take_down_size,
3045
ret = take_down_interface(interface);
3011
while((interface=argz_next(interfaces_to_take_down,
3012
interfaces_to_take_down_size,
3014
ret_errno = take_down_interface(interface);
3048
3017
perror_plus("Failed to take down interface");
3065
3034
free(interfaces_to_take_down);
3066
3035
free(interfaces_hooks);
3068
void clean_dir_at(int base, const char * const dirname,
3070
struct dirent **direntries = NULL;
3072
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3078
perror_plus("open");
3081
int numentries = scandirat(dir_fd, ".", &direntries,
3082
notdotentries, alphasort);
3083
if(numentries >= 0){
3084
for(int i = 0; i < numentries; i++){
3086
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3087
dirname, direntries[i]->d_name);
3089
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3091
if(errno == EISDIR){
3092
dret = unlinkat(dir_fd, direntries[i]->d_name,
3095
if((dret == -1) and (errno == ENOTEMPTY)
3096
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3097
== 0) and (level == 0)){
3098
/* Recurse only in this special case */
3099
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3102
if((dret == -1) and (errno != ENOENT)){
3103
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3104
direntries[i]->d_name, strerror(errno));
3107
free(direntries[i]);
3110
/* need to clean even if 0 because man page doesn't specify */
3112
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3113
if(dret == -1 and errno != ENOENT){
3114
perror_plus("rmdir");
3117
perror_plus("scandirat");
3122
3037
/* Removes the GPGME temp directory and all files inside */
3123
3038
if(tempdir != NULL){
3124
clean_dir_at(-1, tempdir, 0);
3039
struct dirent **direntries = NULL;
3040
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3044
if(tempdir_fd == -1){
3045
perror_plus("open");
3047
int numentries = scandirat(tempdir_fd, ".", &direntries,
3048
notdotentries, alphasort);
3049
if(numentries >= 0){
3050
for(int i = 0; i < numentries; i++){
3051
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3053
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3054
" \"%s\", 0): %s\n", tempdir,
3055
direntries[i]->d_name, strerror(errno));
3057
free(direntries[i]);
3060
/* need to clean even if 0 because man page doesn't specify */
3062
if(numentries == -1){
3063
perror_plus("scandir");
3065
ret = rmdir(tempdir);
3066
if(ret == -1 and errno != ENOENT){
3067
perror_plus("rmdir");