44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
76
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
87
88
#include <sys/klog.h> /* klogctl() */
544
545
struct sockaddr_in6 in6;
546
547
char *buffer = NULL;
547
char *decrypted_buffer;
548
char *decrypted_buffer = NULL;
548
549
size_t buffer_length = 0;
549
550
size_t buffer_capacity = 0;
552
553
gnutls_session_t session;
553
554
int pf; /* Protocol family */
619
616
if(if_index == AVAHI_IF_UNSPEC){
620
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
621
618
" without a network interface\n");
625
621
/* Set the network interface number as scope */
793
776
ret = gnutls_handshake(session);
799
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
801
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
802
784
gnutls_perror(ret);
808
789
fprintf(stderr, "Unknown error while reading data from"
809
790
" encrypted session with Mandos server\n");
811
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
1084
1057
.arg = "SECONDS",
1085
1058
.doc = "Maximum delay to wait for interface startup",
1061
* These reproduce what we would get without ARGP_NO_HELP
1063
{ .name = "help", .key = '?',
1064
.doc = "Give this help list", .group = -1 },
1065
{ .name = "usage", .key = -3,
1066
.doc = "Give a short usage message", .group = -1 },
1067
{ .name = "version", .key = 'V',
1068
.doc = "Print program version", .group = -1 },
1087
1069
{ .name = NULL }
1090
1072
error_t parse_opt(int key, char *arg,
1091
1073
struct argp_state *state){
1093
1076
case 128: /* --debug */
1110
1093
tmpmax = strtoimax(arg, &tmp, 10);
1111
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
1112
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1113
fprintf(stderr, "Bad number of DH bits\n");
1096
argp_error(state, "Bad number of DH bits");
1116
1098
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1123
1105
delay = strtof(arg, &tmp);
1124
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1125
fprintf(stderr, "Bad delay\n");
1107
argp_error(state, "Bad delay");
1111
* These reproduce what we would get without ARGP_NO_HELP
1113
case '?': /* --help */
1114
argp_state_help(state, state->out_stream,
1115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1117
case -3: /* --usage */
1118
argp_state_help(state, state->out_stream,
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1122
exit(argp_err_exit_status);
1134
1125
return ARGP_ERR_UNKNOWN;
1139
1130
struct argp argp = { .options = options, .parser = parse_opt,
1140
1131
.args_doc = "",
1141
1132
.doc = "Mandos client -- Get and decrypt"
1142
1133
" passwords from a Mandos server" };
1143
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1144
if(ret == ARGP_ERR_UNKNOWN){
1145
fprintf(stderr, "Unknown error while parsing arguments\n");
1146
exitcode = EXIT_FAILURE;
1134
ret = argp_parse(&argp, argc, argv,
1135
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1142
perror("argp_parse");
1143
exitcode = EX_OSERR;
1146
exitcode = EX_USAGE;
1249
1249
#ifdef __linux__
1250
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
messages to mess up the prompt */
1251
messages about the network interface to mess up the prompt */
1252
1252
ret = klogctl(8, NULL, 5);
1253
1253
bool restore_loglevel = true;
1559
1559
perror("ioctl SIOCGIFFLAGS");
1560
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~IFF_UP; /* clear flag */
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1562
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1564
1564
perror("ioctl SIOCSIFFLAGS");
1625
1625
sigemptyset(&old_sigterm_action.sa_mask);
1626
1626
old_sigterm_action.sa_handler = SIG_DFL;
1627
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1627
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1628
&old_sigterm_action,
1629
1631
perror("sigaction");
1631
raise(signal_received);
1634
ret = raise(signal_received);
1635
} while(ret != 0 and errno == EINTR);
1640
TEMP_FAILURE_RETRY(pause());
1634
1643
return exitcode;