46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
51
51
#include <sys/ioctl.h> /* ioctl */
52
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
53
sockaddr_in6, PF_INET6,
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
60
#include <fcntl.h> /* open(), unlinkat() */
60
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
#include <errno.h> /* perror(), errno,
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
66
70
program_invocation_short_name */
67
71
#include <time.h> /* nanosleep(), time(), sleep() */
68
72
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
513
517
fprintf_plus(stderr, "GnuTLS: %s", string);
516
__attribute__((nonnull, warn_unused_result))
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
517
521
static int init_gnutls_global(const char *pubkeyfilename,
518
522
const char *seckeyfilename,
519
523
const char *dhparamsfilename,
823
818
/* Set effective uid to 0, return errno */
824
819
__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
820
int raise_privileges(void){
821
int old_errno = errno;
828
823
if(seteuid(0) == -1){
831
826
errno = old_errno;
835
830
/* Set effective and real user ID to 0. Return errno. */
836
831
__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
841
836
errno = old_errno;
844
839
if(setuid(0) == -1){
847
842
errno = old_errno;
851
846
/* Set effective user ID to unprivileged saved user ID */
852
847
__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
848
int lower_privileges(void){
849
int old_errno = errno;
856
851
if(seteuid(uid) == -1){
859
854
errno = old_errno;
863
858
/* Lower privileges permanently */
864
859
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
868
863
if(setuid(uid) == -1){
871
866
errno = old_errno;
875
870
/* Helper function to add_local_route() and delete_local_route() */
1130
1126
goto mandos_end;
1133
memset(&to, 0, sizeof(to));
1134
1129
if(af == AF_INET6){
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1130
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1131
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1132
ret = inet_pton(af, ip, &to6->sin6_addr);
1137
1133
} else { /* IPv4 */
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1134
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1135
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to4->sin_addr);
1626
1634
__attribute__((nonnull, warn_unused_result))
1627
1635
bool get_flags(const char *ifname, struct ifreq *ifr){
1631
1639
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1634
1642
perror_plus("socket");
1638
strcpy(ifr->ifr_name, ifname);
1646
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1647
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1639
1648
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1643
1652
perror_plus("ioctl SIOCGIFFLAGS");
1915
#if __GLIBC_PREREQ(2, 15)
1916
1923
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1917
1924
runnable_hook, alphasort);
1918
#else /* not __GLIBC_PREREQ(2, 15) */
1919
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1921
#endif /* not __GLIBC_PREREQ(2, 15) */
1922
#else /* not __GLIBC__ */
1923
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1925
#endif /* not __GLIBC__ */
1926
1925
if(numhooks == -1){
1927
1926
perror_plus("scandir");
2287
2288
int main(int argc, char *argv[]){
2288
2289
mandos_context mc = { .server = NULL, .dh_bits = 0,
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2290
.priority = "SECURE256:!CTYPE-X.509"
2291
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2292
.current_server = NULL, .interfaces = NULL,
2293
.interfaces_size = 0 };
2292
2294
AvahiSServiceBrowser *sb = NULL;
2293
2295
error_t ret_errno;
2475
2477
.args_doc = "",
2476
2478
.doc = "Mandos client -- Get and decrypt"
2477
2479
" passwords from a Mandos server" };
2478
ret = argp_parse(&argp, argc, argv,
2479
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
ret_errno = argp_parse(&argp, argc, argv,
2481
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2486
2488
perror_plus("argp_parse");
2487
2489
exitcode = EX_OSERR;
2545
TEMP_FAILURE_RETRY(close(pubkey_fd));
2551
if(dh_params_file != NULL
2552
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2553
int dhparams_fd = open(dh_params_file, O_RDONLY);
2554
if(dhparams_fd == -1){
2555
perror_plus("open");
2557
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2559
perror_plus("fstat");
2561
if(S_ISREG(st.st_mode)
2562
and st.st_uid == 0 and st.st_gid == 0){
2563
ret = fchown(dhparams_fd, uid, gid);
2565
perror_plus("fchown");
2549
2573
/* Lower privileges */
2550
ret_errno = lower_privileges();
2574
ret = lower_privileges();
2553
2577
perror_plus("Failed to lower privileges");
2725
2749
errno = bring_up_interface(interface, delay);
2726
2750
if(not interface_was_up){
2727
2751
if(errno != 0){
2728
perror_plus("Failed to bring up interface");
2752
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2753
" %s\n", interface, strerror(errno));
2730
2755
errno = argz_add(&interfaces_to_take_down,
2731
2756
&interfaces_to_take_down_size,
3017
3041
free(interfaces_to_take_down);
3018
3042
free(interfaces_hooks);
3044
void clean_dir_at(int base, const char * const dirname,
3046
struct dirent **direntries = NULL;
3048
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3054
perror_plus("open");
3056
int numentries = scandirat(dir_fd, ".", &direntries,
3057
notdotentries, alphasort);
3058
if(numentries >= 0){
3059
for(int i = 0; i < numentries; i++){
3061
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3062
dirname, direntries[i]->d_name);
3064
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3066
if(errno == EISDIR){
3067
dret = unlinkat(dir_fd, direntries[i]->d_name,
3070
if((dret == -1) and (errno == ENOTEMPTY)
3071
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3072
== 0) and (level == 0)){
3073
/* Recurse only in this special case */
3074
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3078
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3079
direntries[i]->d_name, strerror(errno));
3082
free(direntries[i]);
3085
/* need to clean even if 0 because man page doesn't specify */
3087
if(numentries == -1){
3088
perror_plus("scandirat");
3090
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3091
if(dret == -1 and errno != ENOENT){
3092
perror_plus("rmdir");
3095
perror_plus("scandirat");
3020
3100
/* Removes the GPGME temp directory and all files inside */
3021
3101
if(tempdir != NULL){
3022
struct dirent **direntries = NULL;
3023
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3027
if(tempdir_fd == -1){
3028
perror_plus("open");
3031
#if __GLIBC_PREREQ(2, 15)
3032
int numentries = scandirat(tempdir_fd, ".", &direntries,
3033
notdotentries, alphasort);
3034
#else /* not __GLIBC_PREREQ(2, 15) */
3035
int numentries = scandir(tempdir, &direntries, notdotentries,
3037
#endif /* not __GLIBC_PREREQ(2, 15) */
3038
#else /* not __GLIBC__ */
3039
int numentries = scandir(tempdir, &direntries, notdotentries,
3041
#endif /* not __GLIBC__ */
3042
if(numentries >= 0){
3043
for(int i = 0; i < numentries; i++){
3044
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3046
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3047
" \"%s\", 0): %s\n", tempdir,
3048
direntries[i]->d_name, strerror(errno));
3050
free(direntries[i]);
3053
/* need to clean even if 0 because man page doesn't specify */
3055
if(numentries == -1){
3056
perror_plus("scandir");
3058
ret = rmdir(tempdir);
3059
if(ret == -1 and errno != ENOENT){
3060
perror_plus("rmdir");
3063
TEMP_FAILURE_RETRY(close(tempdir_fd));
3102
clean_dir_at(-1, tempdir, 0);