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#define _LARGEFILE_SOURCE
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#define _FILE_OFFSET_BITS 64
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
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#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
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#include <stdio.h> /* fprintf(), stderr, fwrite(),
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#include <stdint.h> /* uint16_t, uint32_t */
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#include <stddef.h> /* NULL, size_t, ssize_t */
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#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
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#include <stdbool.h> /* bool, true */
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#include <string.h> /* memset(), strcmp(), strlen(),
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strerror(), memcpy(), strcpy() */
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strerror(), asprintf(), strcpy() */
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#include <sys/ioctl.h> /* ioctl */
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#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
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#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
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sockaddr_in6, PF_INET6,
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SOCK_STREAM, INET6_ADDRSTRLEN,
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#include <inttypes.h> /* PRIu16 */
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#include <sys/socket.h> /* socket(), struct sockaddr_in6,
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struct in6_addr, inet_pton(),
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bool debug = false;
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static const char *keydir = "/conf/conf.d/mandos";
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static const char mandos_protocol_version[] = "1";
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const char *argp_program_version = "mandosclient 1.0";
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const char *argp_program_version = "password-request 1.0";
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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
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/* Used for passing in values through the Avahi callback functions */
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fprintf(stderr, "Unsupported algorithm: %s\n",
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result->unsupported_algorithm);
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fprintf(stderr, "Wrong key usage: %d\n",
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fprintf(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(stderr, "File name: %s\n", result->file_name);
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fprintf(stderr, "Attempting to use OpenPGP certificate %s"
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" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
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" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
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ret = gnutls_certificate_set_openpgp_key_file
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(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
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(mc->cred, pubkeyfilename, seckeyfilename,
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GNUTLS_OPENPGP_FMT_BASE64);
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if (ret != GNUTLS_E_SUCCESS) {
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"Error[%d] while reading the OpenPGP key pair ('%s',"
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" '%s')\n", ret, pubkeyfile, seckeyfile);
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" '%s')\n", ret, pubkeyfilename, seckeyfilename);
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fprintf(stdout, "The GnuTLS error is: %s\n",
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safer_gnutls_strerror(ret));
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fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
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fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
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tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
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fprintf(stderr, "Binding to interface %s\n", interface);
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memset(&to,0,sizeof(to)); /* Spurious warning */
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memset(&to, 0, sizeof(to)); /* Spurious warning */
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to.in6.sin6_family = AF_INET6;
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/* It would be nice to have a way to detect if we were passed an
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IPv4 address here. Now we assume an IPv6 address. */
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fprintf(stderr, "Bad address: %s\n", ip);
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to.in6.sin6_port = htons(port); /* Spurious warning */
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to.in6.sin6_port = htons(port); /* Spurious warning */
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to.in6.sin6_scope_id = (uint32_t)if_index;
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fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
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fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
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char addrstr[INET6_ADDRSTRLEN] = "";
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if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
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sizeof(addrstr)) == NULL){
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char ip[AVAHI_ADDRESS_STR_MAX];
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avahi_address_snprint(ip, sizeof(ip), address);
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fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
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" port %d\n", name, host_name, ip, interface, port);
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fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
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PRIu16 ") on port %d\n", name, host_name, ip,
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int ret = start_mandos_communication(ip, port, interface, mc);
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avahi_simple_poll_quit(mc->simple_poll);
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/* Combines file name and path and returns the malloced new
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string. some sane checks could/should be added */
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static const char *combinepath(const char *first, const char *second){
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size_t f_len = strlen(first);
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size_t s_len = strlen(second);
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char *tmp = malloc(f_len + s_len + 2);
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static char *combinepath(const char *first, const char *second){
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int ret = asprintf(&tmp, "%s/%s", first, second);
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memcpy(tmp, first, f_len); /* Spurious warning */
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memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
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tmp[f_len + 1 + s_len] = '\0';
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char *connect_to = NULL;
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AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
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const char *pubkeyfile = "pubkey.txt";
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const char *seckeyfile = "seckey.txt";
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char *pubkeyfilename = NULL;
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char *seckeyfilename = NULL;
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const char *pubkeyname = "pubkey.txt";
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const char *seckeyname = "seckey.txt";
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mandos_context mc = { .simple_poll = NULL, .server = NULL,
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.dh_bits = 1024, .priority = "SECURE256"};
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bool gnutls_initalized = false;
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" passwords from mandos server" };
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ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
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if (ret == ARGP_ERR_UNKNOWN){
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fprintf(stderr, "Unkown error while parsing arguments\n");
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fprintf(stderr, "Unknown error while parsing arguments\n");
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exitcode = EXIT_FAILURE;
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pubkeyfile = combinepath(keydir, pubkeyfile);
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if (pubkeyfile == NULL){
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pubkeyfilename = combinepath(keydir, pubkeyname);
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if (pubkeyfilename == NULL){
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perror("combinepath");
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exitcode = EXIT_FAILURE;
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seckeyfile = combinepath(keydir, seckeyfile);
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if (seckeyfile == NULL){
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seckeyfilename = combinepath(keydir, seckeyname);
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if (seckeyfilename == NULL){
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perror("combinepath");
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exitcode = EXIT_FAILURE;
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ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
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ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
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fprintf(stderr, "init_gnutls_global\n");
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fprintf(stderr, "init_gnutls_global failed\n");
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exitcode = EXIT_FAILURE;
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gnutls_initalized = true;
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/* If the interface is down, bring it up */
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sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
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exitcode = EXIT_FAILURE;
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strcpy(network.ifr_name, interface); /* Spurious warning */
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ret = ioctl(sd, SIOCGIFFLAGS, &network);
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perror("ioctl SIOCGIFFLAGS");
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exitcode = EXIT_FAILURE;
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if((network.ifr_flags & IFF_UP) == 0){
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network.ifr_flags |= IFF_UP;
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ret = ioctl(sd, SIOCSIFFLAGS, &network);
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perror("ioctl SIOCSIFFLAGS");
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exitcode = EXIT_FAILURE;
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ret = setuid(uid);
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perror("setuid");
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/* If the interface is down, bring it up */
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sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
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exitcode = EXIT_FAILURE;
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strcpy(network.ifr_name, interface); /* Spurious warning */
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ret = ioctl(sd, SIOCGIFFLAGS, &network);
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perror("ioctl SIOCGIFFLAGS");
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exitcode = EXIT_FAILURE;
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if((network.ifr_flags & IFF_UP) == 0){
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network.ifr_flags |= IFF_UP;
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ret = ioctl(sd, SIOCSIFFLAGS, &network);
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perror("ioctl SIOCSIFFLAGS");
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exitcode = EXIT_FAILURE;
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avahi_set_log_function(empty_log);