/mandos/release : revision 234

1

/* -*- coding: utf-8 -*- */

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/*

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* Mandos-client - get and decrypt data from a Mandos server

3

* Mandos client - get and decrypt data from a Mandos server

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*

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* This program is partly derived from an example program for an Avahi

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* service browser, downloaded from

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* "browse_callback", and parts of "main".

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*

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* Everything else is

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*

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* This program is free software: you can redistribute it and/or

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* modify it under the terms of the GNU General Public License as

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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */

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#include <stdio.h> /* fprintf(), stderr, fwrite(),

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stdout, ferror(), sscanf */

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stdout, ferror() */

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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 <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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uid_t, gid_t, open(), opendir(),

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DIR */

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uid_t, gid_t, open(), opendir(), DIR */

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#include <sys/stat.h> /* open() */

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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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connect() */

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#include <fcntl.h> /* open() */

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#include <dirent.h> /* opendir(), struct dirent, readdir()

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*/

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#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */

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#include <dirent.h> /* opendir(), struct dirent, readdir() */

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#include <inttypes.h> /* PRIu16 */

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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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getuid(), getgid(), setuid(),

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setgid() */

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#include <arpa/inet.h> /* inet_pton(), htons */

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#include <iso646.h> /* not, and, or */

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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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gnutls_*

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init_gnutls_session(),

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GNUTLS_* */

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#include <gnutls/openpgp.h>

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/* gnutls_certificate_set_openpgp_key_file(),

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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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/* GPGME */

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*/

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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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if (buffer_length + BUFFER_SIZE > buffer_capacity){

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*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

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if(buffer == NULL){

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if (buffer == NULL){

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return 0;

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}

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buffer_capacity += BUFFER_SIZE;

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int fd;

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gpgme_data_t pgp_data;

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fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));

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fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));

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if(fd == -1){

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perror("open");

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return false;

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}

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rc = gpgme_data_new_from_fd(&pgp_data, fd);

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if(rc != GPG_ERR_NO_ERROR){

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return false;

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}

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rc = gpgme_op_import(mc->ctx, pgp_data);

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if(rc != GPG_ERR_NO_ERROR){

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_op_import: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return false;

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}

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ret = (int)TEMP_FAILURE_RETRY(close(fd));

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ret = TEMP_FAILURE_RETRY(close(fd));

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if(ret == -1){

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perror("close");

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}

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return true;

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}

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if(debug){

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if (debug){

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fprintf(stderr, "Initialize gpgme\n");

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}

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/* Init GPGME */

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gpgme_check_version(NULL);

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rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

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if(rc != GPG_ERR_NO_ERROR){

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return false;

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}

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/* Set GPGME home directory for the OpenPGP engine only */

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rc = gpgme_get_engine_info(&engine_info);

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if(rc != GPG_ERR_NO_ERROR){

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rc = gpgme_get_engine_info (&engine_info);

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return false;

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/* Create new GPGME "context" */

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rc = gpgme_new(&(mc->ctx));

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if(rc != GPG_ERR_NO_ERROR){

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_new: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return false;

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}

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if(not import_key(pubkey) or not import_key(seckey)){

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if (not import_key(pubkey) or not import_key(seckey)){

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return false;

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}

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* Decrypt OpenPGP data.

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* Returns -1 on error

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*/

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static ssize_t pgp_packet_decrypt(const mandos_context *mc,

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const char *cryptotext,

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size_t crypto_size,

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char **plaintext){

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static ssize_t pgp_packet_decrypt (const mandos_context *mc,

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const char *cryptotext,

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size_t crypto_size,

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char **plaintext){

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gpgme_data_t dh_crypto, dh_plain;

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gpgme_error_t rc;

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ssize_t ret;

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size_t plaintext_capacity = 0;

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ssize_t plaintext_length = 0;

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if(debug){

248

if (debug){

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fprintf(stderr, "Trying to decrypt OpenPGP data\n");

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}

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/* Create new GPGME data buffer from memory cryptotext */

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rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

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0);

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if(rc != GPG_ERR_NO_ERROR){

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if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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return -1;

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/* Create new empty GPGME data buffer for the plaintext */

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rc = gpgme_data_new(&dh_plain);

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if(rc != GPG_ERR_NO_ERROR){

263

if (rc != GPG_ERR_NO_ERROR){

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fprintf(stderr, "bad gpgme_data_new: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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gpgme_data_release(dh_crypto);

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/* Decrypt data from the cryptotext data buffer to the plaintext

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data buffer */

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rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);

277

if(rc != GPG_ERR_NO_ERROR){

273

if (rc != GPG_ERR_NO_ERROR){

278

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fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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plaintext_length = -1;

281

if(debug){

277

if (debug){

282

278

gpgme_decrypt_result_t result;

283

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result = gpgme_op_decrypt_result(mc->ctx);

284

if(result == NULL){

280

if (result == NULL){

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fprintf(stderr, "gpgme_op_decrypt_result failed\n");

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} else {

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fprintf(stderr, "Unsupported algorithm: %s\n",

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}

315

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/* Seek back to the beginning of the GPGME plaintext data buffer */

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if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){

313

if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){

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perror("gpgme_data_seek");

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plaintext_length = -1;

320

316

goto decrypt_end;

325

321

plaintext_capacity = adjustbuffer(plaintext,

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(size_t)plaintext_length,

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plaintext_capacity);

328

if(plaintext_capacity == 0){

324

if (plaintext_capacity == 0){

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perror("adjustbuffer");

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plaintext_length = -1;

331

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goto decrypt_end;

334

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ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

335

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BUFFER_SIZE);

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/* Print the data, if any */

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if(ret == 0){

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if (ret == 0){

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/* EOF */

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break;

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}

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return plaintext_length;

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}

366

362

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static const char * safer_gnutls_strerror(int value) {

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const char *ret = gnutls_strerror(value); /* Spurious warning from

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-Wunreachable-code */

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if(ret == NULL)

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static const char * safer_gnutls_strerror (int value) {

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const char *ret = gnutls_strerror (value); /* Spurious warning */

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if (ret == NULL)

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ret = "(unknown)";

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return ret;

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}

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}

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ret = gnutls_global_init();

391

if(ret != GNUTLS_E_SUCCESS) {

392

fprintf(stderr, "GnuTLS global_init: %s\n",

393

safer_gnutls_strerror(ret));

386

if (ret != GNUTLS_E_SUCCESS) {

387

fprintf (stderr, "GnuTLS global_init: %s\n",

388

safer_gnutls_strerror(ret));

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return -1;

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}

396

391

397

if(debug){

392

if (debug){

398

393

/* "Use a log level over 10 to enable all debugging options."

399

394

* - GnuTLS manual

400

395

*/

404

399

405

400

/* OpenPGP credentials */

406

401

gnutls_certificate_allocate_credentials(&mc->cred);

407

if(ret != GNUTLS_E_SUCCESS){

408

fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning

409

* from

410

* -Wunreachable-code

411

*/

412

safer_gnutls_strerror(ret));

413

gnutls_global_deinit();

402

if (ret != GNUTLS_E_SUCCESS){

403

fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious

404

warning */

405

safer_gnutls_strerror(ret));

406

gnutls_global_deinit ();

414

407

return -1;

415

408

}

416

409

423

416

ret = gnutls_certificate_set_openpgp_key_file

424

417

(mc->cred, pubkeyfilename, seckeyfilename,

425

418

GNUTLS_OPENPGP_FMT_BASE64);

426

if(ret != GNUTLS_E_SUCCESS) {

419

if (ret != GNUTLS_E_SUCCESS) {

427

420

fprintf(stderr,

428

421

"Error[%d] while reading the OpenPGP key pair ('%s',"

429

422

" '%s')\n", ret, pubkeyfilename, seckeyfilename);

434

427

435

428

/* GnuTLS server initialization */

436

429

ret = gnutls_dh_params_init(&mc->dh_params);

437

if(ret != GNUTLS_E_SUCCESS) {

438

fprintf(stderr, "Error in GnuTLS DH parameter initialization:"

439

" %s\n", safer_gnutls_strerror(ret));

430

if (ret != GNUTLS_E_SUCCESS) {

431

fprintf (stderr, "Error in GnuTLS DH parameter initialization:"

432

" %s\n", safer_gnutls_strerror(ret));

440

433

goto globalfail;

441

434

}

442

435

ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);

443

if(ret != GNUTLS_E_SUCCESS) {

444

fprintf(stderr, "Error in GnuTLS prime generation: %s\n",

445

safer_gnutls_strerror(ret));

436

if (ret != GNUTLS_E_SUCCESS) {

437

fprintf (stderr, "Error in GnuTLS prime generation: %s\n",

438

safer_gnutls_strerror(ret));

446

439

goto globalfail;

447

440

}

448

441

463

456

int ret;

464

457

/* GnuTLS session creation */

465

458

ret = gnutls_init(session, GNUTLS_SERVER);

466

if(ret != GNUTLS_E_SUCCESS){

459

if (ret != GNUTLS_E_SUCCESS){

467

460

fprintf(stderr, "Error in GnuTLS session initialization: %s\n",

468

461

safer_gnutls_strerror(ret));

469

462

}

471

464

{

472

465

const char *err;

473

466

ret = gnutls_priority_set_direct(*session, mc->priority, &err);

474

if(ret != GNUTLS_E_SUCCESS) {

467

if (ret != GNUTLS_E_SUCCESS) {

475

468

fprintf(stderr, "Syntax error at: %s\n", err);

476

469

fprintf(stderr, "GnuTLS error: %s\n",

477

470

safer_gnutls_strerror(ret));

478

gnutls_deinit(*session);

471

gnutls_deinit (*session);

479

472

return -1;

480

473

}

481

474

}

482

475

483

476

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

484

477

mc->cred);

485

if(ret != GNUTLS_E_SUCCESS) {

478

if (ret != GNUTLS_E_SUCCESS) {

486

479

fprintf(stderr, "Error setting GnuTLS credentials: %s\n",

487

480

safer_gnutls_strerror(ret));

488

gnutls_deinit(*session);

481

gnutls_deinit (*session);

489

482

return -1;

490

483

}

491

484

492

485

/* ignore client certificate if any. */

493

gnutls_certificate_server_set_request(*session,

494

GNUTLS_CERT_IGNORE);

486

gnutls_certificate_server_set_request (*session,

487

GNUTLS_CERT_IGNORE);

495

488

496

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

489

gnutls_dh_set_prime_bits (*session, mc->dh_bits);

497

490

498

491

return 0;

499

492

}

507

500

AvahiIfIndex if_index,

508

501

mandos_context *mc){

509

502

int ret, tcp_sd;

510

ssize_t sret;

511

503

union { struct sockaddr in; struct sockaddr_in6 in6; } to;

512

504

char *buffer = NULL;

513

505

char *decrypted_buffer;

519

511

char interface[IF_NAMESIZE];

520

512

gnutls_session_t session;

521

513

522

ret = init_gnutls_session(mc, &session);

523

if(ret != 0){

514

ret = init_gnutls_session (mc, &session);

515

if (ret != 0){

524

516

return -1;

525

517

}

526

518

548

540

/* It would be nice to have a way to detect if we were passed an

549

541

IPv4 address here. Now we assume an IPv6 address. */

550

542

ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);

551

if(ret < 0 ){

543

if (ret < 0 ){

552

544

perror("inet_pton");

553

545

return -1;

554

546

}

556

548

fprintf(stderr, "Bad address: %s\n", ip);

557

549

return -1;

558

550

}

559

to.in6.sin6_port = htons(port); /* Spurious warnings from

560

-Wconversion and

561

-Wunreachable-code */

551

to.in6.sin6_port = htons(port); /* Spurious warning */

562

552

563

553

to.in6.sin6_scope_id = (uint32_t)if_index;

564

554

577

567

}

578

568

579

569

ret = connect(tcp_sd, &to.in, sizeof(to));

580

if(ret < 0){

570

if (ret < 0){

581

571

perror("connect");

582

572

return -1;

583

573

}

584

574

585

575

const char *out = mandos_protocol_version;

586

576

written = 0;

587

while(true){

577

while (true){

588

578

size_t out_size = strlen(out);

589

ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

579

ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

590

580

out_size - written));

591

if(ret == -1){

581

if (ret == -1){

592

582

perror("write");

593

583

retval = -1;

594

584

goto mandos_end;

597

587

if(written < out_size){

598

588

continue;

599

589

} else {

600

if(out == mandos_protocol_version){

590

if (out == mandos_protocol_version){

601

591

written = 0;

602

592

out = "\r\n";

603

593

} else {

610

600

fprintf(stderr, "Establishing TLS session with %s\n", ip);

611

601

}

612

602

613

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

603

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

614

604

615

605

do{

616

ret = gnutls_handshake(session);

606

ret = gnutls_handshake (session);

617

607

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

618

608

619

if(ret != GNUTLS_E_SUCCESS){

609

if (ret != GNUTLS_E_SUCCESS){

620

610

if(debug){

621

611

fprintf(stderr, "*** GnuTLS Handshake failed ***\n");

622

gnutls_perror(ret);

612

gnutls_perror (ret);

623

613

}

624

614

retval = -1;

625

615

goto mandos_end;

635

625

while(true){

636

626

buffer_capacity = adjustbuffer(&buffer, buffer_length,

637

627

buffer_capacity);

638

if(buffer_capacity == 0){

628

if (buffer_capacity == 0){

639

629

perror("adjustbuffer");

640

630

retval = -1;

641

631

goto mandos_end;

642

632

}

643

633

644

sret = gnutls_record_recv(session, buffer+buffer_length,

645

BUFFER_SIZE);

646

if(sret == 0){

634

ret = gnutls_record_recv(session, buffer+buffer_length,

635

BUFFER_SIZE);

636

if (ret == 0){

647

637

break;

648

638

}

649

if(sret < 0){

650

switch(sret){

639

if (ret < 0){

640

switch(ret){

651

641

case GNUTLS_E_INTERRUPTED:

652

642

case GNUTLS_E_AGAIN:

653

643

break;

654

644

case GNUTLS_E_REHANDSHAKE:

655

645

do{

656

ret = gnutls_handshake(session);

646

ret = gnutls_handshake (session);

657

647

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

658

if(ret < 0){

648

if (ret < 0){

659

649

fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");

660

gnutls_perror(ret);

650

gnutls_perror (ret);

661

651

retval = -1;

662

652

goto mandos_end;

663

653

}

666

656

fprintf(stderr, "Unknown error while reading data from"

667

657

" encrypted session with Mandos server\n");

668

658

retval = -1;

669

gnutls_bye(session, GNUTLS_SHUT_RDWR);

659

gnutls_bye (session, GNUTLS_SHUT_RDWR);

670

660

goto mandos_end;

671

661

}

672

662

} else {

673

buffer_length += (size_t) sret;

663

buffer_length += (size_t) ret;

674

664

}

675

665

}

676

666

678

668

fprintf(stderr, "Closing TLS session\n");

679

669

}

680

670

681

gnutls_bye(session, GNUTLS_SHUT_RDWR);

671

gnutls_bye (session, GNUTLS_SHUT_RDWR);

682

672

683

if(buffer_length > 0){

673

if (buffer_length > 0){

684

674

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

685

675

buffer_length,

686

676

&decrypted_buffer);

687

if(decrypted_buffer_size >= 0){

677

if (decrypted_buffer_size >= 0){

688

678

written = 0;

689

679

while(written < (size_t) decrypted_buffer_size){

690

ret = (int)fwrite(decrypted_buffer + written, 1,

691

(size_t)decrypted_buffer_size - written,

692

stdout);

680

ret = (int)fwrite (decrypted_buffer + written, 1,

681

(size_t)decrypted_buffer_size - written,

682

stdout);

693

683

if(ret == 0 and ferror(stdout)){

694

684

if(debug){

695

685

fprintf(stderr, "Error writing encrypted data: %s\n",

712

702

713

703

mandos_end:

714

704

free(buffer);

715

ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));

705

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

716

706

if(ret == -1){

717

707

perror("close");

718

708

}

719

gnutls_deinit(session);

709

gnutls_deinit (session);

720

710

return retval;

721

711

}

722

712

740

730

/* Called whenever a service has been resolved successfully or

741

731

timed out */

742

732

743

switch(event) {

733

switch (event) {

744

734

default:

745

735

case AVAHI_RESOLVER_FAILURE:

746

736

fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"

754

744

avahi_address_snprint(ip, sizeof(ip), address);

755

745

if(debug){

756

746

fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"

757

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

758

ip, (intmax_t)interface, port);

747

PRIu16 ") on port %d\n", name, host_name, ip,

748

interface, port);

759

749

}

760

750

int ret = start_mandos_communication(ip, port, interface, mc);

761

if(ret == 0){

751

if (ret == 0){

762

752

avahi_simple_poll_quit(mc->simple_poll);

763

753

}

764

754

}

782

772

/* Called whenever a new services becomes available on the LAN or

783

773

is removed from the LAN */

784

774

785

switch(event) {

775

switch (event) {

786

776

default:

787

777

case AVAHI_BROWSER_FAILURE:

788

778

797

787

the callback function is called the Avahi server will free the

798

788

resolver for us. */

799

789

800

if(!(avahi_s_service_resolver_new(mc->server, interface,

790

if (!(avahi_s_service_resolver_new(mc->server, interface,

801

791

protocol, name, type, domain,

802

792

AVAHI_PROTO_INET6, 0,

803

793

resolve_callback, mc)))

821

811

AvahiSServiceBrowser *sb = NULL;

822

812

int error;

823

813

int ret;

824

intmax_t tmpmax;

825

int numchars;

826

814

int exitcode = EXIT_SUCCESS;

827

815

const char *interface = "eth0";

828

816

struct ifreq network;

838

826

mandos_context mc = { .simple_poll = NULL, .server = NULL,

839

827

.dh_bits = 1024, .priority = "SECURE256"

840

828

":!CTYPE-X.509:+CTYPE-OPENPGP" };

841

bool gnutls_initialized = false;

842

bool gpgme_initialized = false;

829

bool gnutls_initalized = false;

830

bool gpgme_initalized = false;

843

831

844

832

{

845

833

struct argp_option options[] = {

874

862

{ .name = NULL }

875

863

};

876

864

877

error_t parse_opt(int key, char *arg,

878

struct argp_state *state) {

879

switch(key) {

865

error_t parse_opt (int key, char *arg,

866

struct argp_state *state) {

867

/* Get the INPUT argument from `argp_parse', which we know is

868

a pointer to our plugin list pointer. */

869

switch (key) {

880

870

case 128: /* --debug */

881

871

debug = true;

882

872

break;

893

883

pubkey = arg;

894

884

break;

895

885

case 129: /* --dh-bits */

896

ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);

897

if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax

898

or arg[numchars] != '\0'){

899

fprintf(stderr, "Bad number of DH bits\n");

886

errno = 0;

887

mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);

888

if (errno){

889

perror("strtol");

900

890

exit(EXIT_FAILURE);

901

891

}

902

mc.dh_bits = (typeof(mc.dh_bits))tmpmax;

903

892

break;

904

893

case 130: /* --priority */

905

894

mc.priority = arg;

906

895

break;

907

896

case ARGP_KEY_ARG:

908

argp_usage(state);

897

argp_usage (state);

909

898

case ARGP_KEY_END:

910

899

break;

911

900

default:

918

907

.args_doc = "",

919

908

.doc = "Mandos client -- Get and decrypt"

920

909

" passwords from a Mandos server" };

921

ret = argp_parse(&argp, argc, argv, 0, 0, NULL);

922

if(ret == ARGP_ERR_UNKNOWN){

910

ret = argp_parse (&argp, argc, argv, 0, 0, NULL);

911

if (ret == ARGP_ERR_UNKNOWN){

923

912

fprintf(stderr, "Unknown error while parsing arguments\n");

924

913

exitcode = EXIT_FAILURE;

925

914

goto end;

950

939

goto end;

951

940

}

952

941

}

953

ret = (int)TEMP_FAILURE_RETRY(close(sd));

942

ret = TEMP_FAILURE_RETRY(close(sd));

954

943

if(ret == -1){

955

944

perror("close");

956

945

}

960

949

gid = getgid();

961

950

962

951

ret = setuid(uid);

963

if(ret == -1){

952

if (ret == -1){

964

953

perror("setuid");

965

954

}

966

955

967

956

setgid(gid);

968

if(ret == -1){

957

if (ret == -1){

969

958

perror("setgid");

970

959

}

971

960

972

961

ret = init_gnutls_global(&mc, pubkey, seckey);

973

if(ret == -1){

962

if (ret == -1){

974

963

fprintf(stderr, "init_gnutls_global failed\n");

975

964

exitcode = EXIT_FAILURE;

976

965

goto end;

977

966

} else {

978

gnutls_initialized = true;

967

gnutls_initalized = true;

979

968

}

980

969

981

970

if(mkdtemp(tempdir) == NULL){

985

974

}

986

975

987

976

if(not init_gpgme(&mc, pubkey, seckey, tempdir)){

988

fprintf(stderr, "init_gpgme failed\n");

977

fprintf(stderr, "gpgme_initalized failed\n");

989

978

exitcode = EXIT_FAILURE;

990

979

goto end;

991

980

} else {

992

gpgme_initialized = true;

981

gpgme_initalized = true;

993

982

}

994

983

995

984

if_index = (AvahiIfIndex) if_nametoindex(interface);

1007

996

exitcode = EXIT_FAILURE;

1008

997

goto end;

1009

998

}

1010

uint16_t port;

1011

ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);

1012

if(ret < 1 or tmpmax != (uint16_t)tmpmax

1013

or address[numchars+1] != '\0'){

1014

fprintf(stderr, "Bad port number\n");

999

errno = 0;

1000

uint16_t port = (uint16_t) strtol(address+1, NULL, 10);

1001

if(errno){

1002

perror("Bad port number");

1015

1003

exitcode = EXIT_FAILURE;

1016

1004

goto end;

1017

1005

}

1018

port = (uint16_t)tmpmax;

1019

1006

*address = '\0';

1020

1007

address = connect_to;

1021

1008

ret = start_mandos_communication(address, port, if_index, &mc);

1027

1014

goto end;

1028

1015

}

1029

1016

1030

if(not debug){

1017

if (not debug){

1031

1018

avahi_set_log_function(empty_log);

1032

1019

}

1033

1020

1036

1023

1037

1024

/* Allocate main Avahi loop object */

1038

1025

mc.simple_poll = avahi_simple_poll_new();

1039

if(mc.simple_poll == NULL) {

1026

if (mc.simple_poll == NULL) {

1040

1027

fprintf(stderr, "Avahi: Failed to create simple poll"

1041

1028

" object.\n");

1042

1029

exitcode = EXIT_FAILURE;

1062

1049

}

1063

1050

1064

1051

/* Check if creating the Avahi server object succeeded */

1065

if(mc.server == NULL) {

1052

if (mc.server == NULL) {

1066

1053

fprintf(stderr, "Failed to create Avahi server: %s\n",

1067

1054

avahi_strerror(error));

1068

1055

exitcode = EXIT_FAILURE;

1074

1061

AVAHI_PROTO_INET6,

1075

1062

"_mandos._tcp", NULL, 0,

1076

1063

browse_callback, &mc);

1077

if(sb == NULL) {

1064

if (sb == NULL) {

1078

1065

fprintf(stderr, "Failed to create service browser: %s\n",

1079

1066

avahi_strerror(avahi_server_errno(mc.server)));

1080

1067

exitcode = EXIT_FAILURE;

1083

1070

1084

1071

/* Run the main loop */

1085

1072

1086

if(debug){

1073

if (debug){

1087

1074

fprintf(stderr, "Starting Avahi loop search\n");

1088

1075

}

1089

1076

1091

1078

1092

1079

end:

1093

1080

1094

if(debug){

1081

if (debug){

1095

1082

fprintf(stderr, "%s exiting\n", argv[0]);

1096

1083

}

1097

1084

1098

1085

/* Cleanup things */

1099

if(sb != NULL)

1086

if (sb != NULL)

1100

1087

avahi_s_service_browser_free(sb);

1101

1088

1102

if(mc.server != NULL)

1089

if (mc.server != NULL)

1103

1090

avahi_server_free(mc.server);

1104

1091

1105

if(mc.simple_poll != NULL)

1092

if (mc.simple_poll != NULL)

1106

1093

avahi_simple_poll_free(mc.simple_poll);

1107

1094

1108

if(gnutls_initialized){

1095

if (gnutls_initalized){

1109

1096

gnutls_certificate_free_credentials(mc.cred);

1110

gnutls_global_deinit();

1097

gnutls_global_deinit ();

1111

1098

gnutls_dh_params_deinit(mc.dh_params);

1112

1099

}

1113

1100

1114

if(gpgme_initialized){

1101

if(gpgme_initalized){

1115

1102

gpgme_release(mc.ctx);

1116

1103

}

1117

1104

1121

1108

struct dirent *direntry;

1122

1109

d = opendir(tempdir);

1123

1110

if(d == NULL){

1124

if(errno != ENOENT){

1125

perror("opendir");

1126

}

1111

perror("opendir");

1127

1112

} else {

1128

1113

while(true){

1129

1114

direntry = readdir(d);

1130

1115

if(direntry == NULL){

1131

1116

break;

1132

1117

}

1133

if(direntry->d_type == DT_REG){

1118

if (direntry->d_type == DT_REG){

1134

1119

char *fullname = NULL;

1135

1120

ret = asprintf(&fullname, "%s/%s", tempdir,

1136

1121

direntry->d_name);

1149

1134

closedir(d);

1150

1135

}

1151

1136

ret = rmdir(tempdir);

1152

if(ret == -1 and errno != ENOENT){

1137

if(ret == -1){

1153

1138

perror("rmdir");

1154

1139

}

1155

1140

}