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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
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#include <net/if.h> /* if_nametoindex */
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#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
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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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#include <sys/ioctl.h> /* ioctl */
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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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#include <assert.h> /* assert() */
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#include <errno.h> /* perror(), errno */
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#include <time.h> /* time() */
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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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SIOCSIFFLAGS, if_indextoname(),
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if_nametoindex(), IF_NAMESIZE */
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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
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getuid(), getgid(), setuid(),
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#include <netinet/in.h>
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#include <arpa/inet.h> /* inet_pton(), htons */
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#include <iso646.h> /* not, and */
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#include <argp.h> /* struct argp_option, error_t, struct
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argp_state, struct argp,
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argp_parse(), ARGP_KEY_ARG,
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ARGP_KEY_END, ARGP_ERR_UNKNOWN */
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/* All Avahi types, constants and functions
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#include <avahi-core/core.h>
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#include <avahi-core/lookup.h>
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#include <avahi-core/log.h>
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#include <avahi-common/malloc.h>
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#include <avahi-common/error.h>
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/* Mandos client part */
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#include <sys/types.h> /* socket(), inet_pton() */
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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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#include <gnutls/gnutls.h> /* All GnuTLS stuff */
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#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
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#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
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init_gnutls_session(),
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#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
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GNUTLS_OPENPGP_FMT_BASE64 */
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#include <unistd.h> /* close() */
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#include <netinet/in.h>
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#include <stdbool.h> /* true */
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#include <string.h> /* memset */
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#include <arpa/inet.h> /* inet_pton() */
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#include <iso646.h> /* not */
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#include <net/if.h> /* IF_NAMESIZE */
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#include <argp.h> /* struct argp_option,
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struct argp_state, struct argp,
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#include <errno.h> /* perror() */
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#include <gpgme.h> /* All GPGME types, constants and functions
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GPGME_PROTOCOL_OpenPGP,
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#define BUFFER_SIZE 256
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bool debug = false;
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static const char *keydir = "/conf/conf.d/mandos";
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const char *argp_program_version = "mandosclient 0.9";
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static const char mandos_protocol_version[] = "1";
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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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static const char mandos_protocol_version[] = "1";
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/* Used for passing in values through the Avahi callback functions */
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const char *priority;
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/* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
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* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
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* "buffer_capacity" is how much is currently allocated,
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* "buffer_length" is how much is already used. */
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* "buffer_length" is how much is already used.
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size_t adjustbuffer(char **buffer, size_t buffer_length,
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size_t buffer_capacity){
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if (buffer_length + BUFFER_SIZE > buffer_capacity){
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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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if (ret != GNUTLS_E_SUCCESS) {
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fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
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" %s\n", safer_gnutls_strerror(ret));
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ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
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if (ret != GNUTLS_E_SUCCESS) {
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fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
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safer_gnutls_strerror(ret));
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gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
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gnutls_certificate_free_credentials(mc->cred);
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gnutls_global_deinit();
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static int init_gnutls_session(mandos_context *mc,
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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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.doc = "Mandos client -- Get and decrypt"
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" passwords from mandos server" };
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argp_parse (&argp, argc, argv, 0, 0, NULL);
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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, "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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seckeyfile = combinepath(keydir, seckeyfile);
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if (seckeyfile == 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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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);