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> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy() */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
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(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
66
EAI_SYSTEM, ENETUNREACH,
67
EHOSTUNREACH, ECONNREFUSED, EPROTO,
68
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
65
#include <errno.h> /* perror(), errno,
70
66
program_invocation_short_name */
71
67
#include <time.h> /* nanosleep(), time(), sleep() */
72
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
517
513
fprintf_plus(stderr, "GnuTLS: %s", string);
520
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
521
517
static int init_gnutls_global(const char *pubkeyfilename,
522
518
const char *seckeyfilename,
523
519
const char *dhparamsfilename,
818
823
/* Set effective uid to 0, return errno */
819
824
__attribute__((warn_unused_result))
820
int raise_privileges(void){
821
int old_errno = errno;
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
823
828
if(seteuid(0) == -1){
826
831
errno = old_errno;
830
835
/* Set effective and real user ID to 0. Return errno. */
831
836
__attribute__((warn_unused_result))
832
int raise_privileges_permanently(void){
833
int old_errno = errno;
834
int ret = raise_privileges();
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
836
841
errno = old_errno;
839
844
if(setuid(0) == -1){
842
847
errno = old_errno;
846
851
/* Set effective user ID to unprivileged saved user ID */
847
852
__attribute__((warn_unused_result))
848
int lower_privileges(void){
849
int old_errno = errno;
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
851
856
if(seteuid(uid) == -1){
854
859
errno = old_errno;
858
863
/* Lower privileges permanently */
859
864
__attribute__((warn_unused_result))
860
int lower_privileges_permanently(void){
861
int old_errno = errno;
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
863
868
if(setuid(uid) == -1){
866
871
errno = old_errno;
870
875
/* Helper function to add_local_route() and delete_local_route() */
1126
1130
goto mandos_end;
1133
memset(&to, 0, sizeof(to));
1129
1134
if(af == AF_INET6){
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);
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1133
1137
} else { /* IPv4 */
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);
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1634
1626
__attribute__((nonnull, warn_unused_result))
1635
1627
bool get_flags(const char *ifname, struct ifreq *ifr){
1639
1631
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1642
1634
perror_plus("socket");
1646
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1647
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1638
strcpy(ifr->ifr_name, ifname);
1648
1639
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1652
1643
perror_plus("ioctl SIOCGIFFLAGS");
1915
#if __GLIBC_PREREQ(2, 15)
1923
1916
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1924
1917
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__ */
1925
1926
if(numhooks == -1){
1926
1927
perror_plus("scandir");
2288
2287
int main(int argc, char *argv[]){
2289
2288
mandos_context mc = { .server = NULL, .dh_bits = 0,
2290
.priority = "SECURE256:!CTYPE-X.509"
2291
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2292
.current_server = NULL, .interfaces = NULL,
2293
.interfaces_size = 0 };
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2294
2292
AvahiSServiceBrowser *sb = NULL;
2295
2293
error_t ret_errno;
2477
2475
.args_doc = "",
2478
2476
.doc = "Mandos client -- Get and decrypt"
2479
2477
" passwords from a Mandos server" };
2480
ret_errno = argp_parse(&argp, argc, argv,
2481
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2478
ret = argp_parse(&argp, argc, argv,
2479
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2488
2486
perror_plus("argp_parse");
2489
2487
exitcode = EX_OSERR;
2749
2746
errno = bring_up_interface(interface, delay);
2750
2747
if(not interface_was_up){
2751
2748
if(errno != 0){
2752
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2753
" %s\n", interface, strerror(errno));
2749
perror_plus("Failed to bring up interface");
2755
2751
errno = argz_add(&interfaces_to_take_down,
2756
2752
&interfaces_to_take_down_size,
3041
3038
free(interfaces_to_take_down);
3042
3039
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");
3100
3041
/* Removes the GPGME temp directory and all files inside */
3101
3042
if(tempdir != NULL){
3102
clean_dir_at(-1, tempdir, 0);
3043
struct dirent **direntries = NULL;
3044
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3048
if(tempdir_fd == -1){
3049
perror_plus("open");
3052
#if __GLIBC_PREREQ(2, 15)
3053
int numentries = scandirat(tempdir_fd, ".", &direntries,
3054
notdotentries, alphasort);
3055
#else /* not __GLIBC_PREREQ(2, 15) */
3056
int numentries = scandir(tempdir, &direntries, notdotentries,
3058
#endif /* not __GLIBC_PREREQ(2, 15) */
3059
#else /* not __GLIBC__ */
3060
int numentries = scandir(tempdir, &direntries, notdotentries,
3062
#endif /* not __GLIBC__ */
3063
if(numentries >= 0){
3064
for(int i = 0; i < numentries; i++){
3065
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3067
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3068
" \"%s\", 0): %s\n", tempdir,
3069
direntries[i]->d_name, strerror(errno));
3071
free(direntries[i]);
3074
/* need to clean even if 0 because man page doesn't specify */
3076
if(numentries == -1){
3077
perror_plus("scandir");
3079
ret = rmdir(tempdir);
3080
if(ret == -1 and errno != ENOENT){
3081
perror_plus("rmdir");
3084
TEMP_FAILURE_RETRY(close(tempdir_fd));