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* "browse_callback", and parts of "main".
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* Everything else is
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* Copyright © 2008-2018 Teddy Hogeborn
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* Copyright © 2008-2018 Björn Påhlsson
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* This file is part of Mandos.
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* Mandos is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* Mandos is distributed in the hope that it will be useful, but
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* Copyright © 2008-2016 Teddy Hogeborn
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* Copyright © 2008-2016 Björn Påhlsson
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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* 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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#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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gpgme_strsource(rc), gpgme_strerror(rc));
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gpgme_import_result_t import_result
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= gpgme_op_import_result(mc->ctx);
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if((import_result->imported < 1
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or import_result->not_imported > 0)
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and import_result->unchanged == 0){
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fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
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"The total number of considered keys: %d\n",
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import_result->considered);
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"The number of keys without user ID: %d\n",
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import_result->no_user_id);
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"The total number of imported keys: %d\n",
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import_result->imported);
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fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
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import_result->imported_rsa);
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fprintf_plus(stderr, "The number of unchanged keys: %d\n",
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import_result->unchanged);
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fprintf_plus(stderr, "The number of new user IDs: %d\n",
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import_result->new_user_ids);
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fprintf_plus(stderr, "The number of new sub keys: %d\n",
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import_result->new_sub_keys);
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fprintf_plus(stderr, "The number of new signatures: %d\n",
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import_result->new_signatures);
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fprintf_plus(stderr, "The number of new revocations: %d\n",
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import_result->new_revocations);
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"The total number of secret keys read: %d\n",
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import_result->secret_read);
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"The number of imported secret keys: %d\n",
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import_result->secret_imported);
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"The number of unchanged secret keys: %d\n",
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import_result->secret_unchanged);
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fprintf_plus(stderr, "The number of keys not imported: %d\n",
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import_result->not_imported);
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for(gpgme_import_status_t import_status
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= import_result->imports;
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import_status != NULL;
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import_status = import_status->next){
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fprintf_plus(stderr, "Import status for key: %s\n",
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if(import_status->result != GPG_ERR_NO_ERROR){
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fprintf_plus(stderr, "Import result: %s: %s\n",
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gpgme_strsource(import_status->result),
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gpgme_strerror(import_status->result));
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fprintf_plus(stderr, "Key status:\n");
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import_status->status & GPGME_IMPORT_NEW
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? "The key was new.\n"
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: "The key was not new.\n");
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import_status->status & GPGME_IMPORT_UID
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? "The key contained new user IDs.\n"
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: "The key did not contain new user IDs.\n");
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import_status->status & GPGME_IMPORT_SIG
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? "The key contained new signatures.\n"
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: "The key did not contain new signatures.\n");
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import_status->status & GPGME_IMPORT_SUBKEY
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? "The key contained new sub keys.\n"
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: "The key did not contain new sub keys.\n");
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import_status->status & GPGME_IMPORT_SECRET
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? "The key contained a secret key.\n"
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: "The key did not contain a secret key.\n");
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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);
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for(gpgme_recipient_t r = result->recipients; r != NULL;
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gpgme_recipient_t recipient;
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recipient = result->recipients;
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while(recipient != NULL){
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fprintf_plus(stderr, "Public key algorithm: %s\n",
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gpgme_pubkey_algo_name(r->pubkey_algo));
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fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
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gpgme_pubkey_algo_name
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(recipient->pubkey_algo));
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fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
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fprintf_plus(stderr, "Secret key available: %s\n",
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r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
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recipient->status == GPG_ERR_NO_SECKEY
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recipient = recipient->next;
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/* Set effective uid to 0, return errno */
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__attribute__((warn_unused_result))
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int raise_privileges(void){
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int old_errno = errno;
816
error_t raise_privileges(void){
817
error_t old_errno = errno;
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error_t ret_errno = 0;
902
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if(seteuid(0) == -1){
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errno = old_errno;
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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){
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int old_errno = errno;
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int ret = raise_privileges();
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error_t raise_privileges_permanently(void){
829
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){
921
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errno = old_errno;
925
842
/* Set effective user ID to unprivileged saved user ID */
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__attribute__((warn_unused_result))
927
int lower_privileges(void){
928
int old_errno = errno;
844
error_t lower_privileges(void){
845
error_t old_errno = errno;
846
error_t ret_errno = 0;
930
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if(seteuid(uid) == -1){
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errno = old_errno;
937
854
/* Lower privileges permanently */
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__attribute__((warn_unused_result))
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int lower_privileges_permanently(void){
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int old_errno = errno;
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error_t lower_privileges_permanently(void){
857
error_t old_errno = errno;
858
error_t ret_errno = 0;
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if(setuid(uid) == -1){
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errno = old_errno;
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/* Helper function to add_local_route() and delete_local_route() */
2012
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
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perror_plus("open(\"/dev/null\", O_RDONLY)");
2017
1908
int numhooks = scandirat(hookdir_fd, ".", &direntries,
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1909
runnable_hook, alphasort);
2019
1910
if(numhooks == -1){
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1911
perror_plus("scandir");
2024
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struct dirent *direntry;
1916
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1918
perror_plus("open(\"/dev/null\", O_RDONLY)");
2026
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for(int i = 0; i < numhooks; i++){
2027
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direntry = direntries[i];
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.args_doc = "",
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.doc = "Mandos client -- Get and decrypt"
2569
2462
" passwords from a Mandos server" };
2570
ret_errno = argp_parse(&argp, argc, argv,
2571
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2463
ret = argp_parse(&argp, argc, argv,
2464
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2578
2471
perror_plus("argp_parse");
2579
2472
exitcode = EX_OSERR;
3137
3024
free(interfaces_to_take_down);
3138
3025
free(interfaces_hooks);
3140
void clean_dir_at(int base, const char * const dirname,
3142
struct dirent **direntries = NULL;
3144
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3150
perror_plus("open");
3153
int numentries = scandirat(dir_fd, ".", &direntries,
3154
notdotentries, alphasort);
3155
if(numentries >= 0){
3156
for(int i = 0; i < numentries; i++){
3158
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3159
dirname, direntries[i]->d_name);
3161
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3163
if(errno == EISDIR){
3164
dret = unlinkat(dir_fd, direntries[i]->d_name,
3167
if((dret == -1) and (errno == ENOTEMPTY)
3168
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3169
== 0) and (level == 0)){
3170
/* Recurse only in this special case */
3171
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3174
if((dret == -1) and (errno != ENOENT)){
3175
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3176
direntries[i]->d_name, strerror(errno));
3179
free(direntries[i]);
3182
/* need to clean even if 0 because man page doesn't specify */
3184
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3185
if(dret == -1 and errno != ENOENT){
3186
perror_plus("rmdir");
3189
perror_plus("scandirat");
3194
3027
/* Removes the GPGME temp directory and all files inside */
3195
3028
if(tempdir != NULL){
3196
clean_dir_at(-1, tempdir, 0);
3029
struct dirent **direntries = NULL;
3030
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3034
if(tempdir_fd == -1){
3035
perror_plus("open");
3037
int numentries = scandirat(tempdir_fd, ".", &direntries,
3038
notdotentries, alphasort);
3039
if(numentries >= 0){
3040
for(int i = 0; i < numentries; i++){
3041
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3043
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3044
" \"%s\", 0): %s\n", tempdir,
3045
direntries[i]->d_name, strerror(errno));
3047
free(direntries[i]);
3050
/* need to clean even if 0 because man page doesn't specify */
3052
if(numentries == -1){
3053
perror_plus("scandir");
3055
ret = rmdir(tempdir);
3056
if(ret == -1 and errno != ENOENT){
3057
perror_plus("rmdir");