/mandos/release : revision 203

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

4

*

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

6

* 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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13

12

14

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*

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

16

15

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

36

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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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106

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#define BUFFER_SIZE 256

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103

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/*

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#define PATHDIR "/conf/conf.d/mandos"

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*/

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#define PATHDIR "/conf/conf.d/mandos"

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#define SECKEY "seckey.txt"

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#define PUBKEY "pubkey.txt"

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bool debug = false;

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static const char mandos_protocol_version[] = "1";

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const char *argp_program_version = "mandos-client " VERSION;

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const char *argp_program_version = "mandos-client 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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*/

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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){

169

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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182

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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}

189

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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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}

193

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/* Init GPGME */

195

gpgme_check_version(NULL);

196

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

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if(rc != GPG_ERR_NO_ERROR){

197

if (rc != GPG_ERR_NO_ERROR){

198

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));

225

if(rc != GPG_ERR_NO_ERROR){

225

if (rc != GPG_ERR_NO_ERROR){

226

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

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gpgme_strsource(rc), gpgme_strerror(rc));

228

return false;

229

}

230

231

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

231

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

232

return false;

233

}

234

239

* Decrypt OpenPGP data.

240

* Returns -1 on error

241

*/

242

static ssize_t pgp_packet_decrypt(const mandos_context *mc,

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const char *cryptotext,

244

size_t crypto_size,

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char **plaintext){

242

static ssize_t pgp_packet_decrypt (const mandos_context *mc,

243

const char *cryptotext,

244

size_t crypto_size,

245

char **plaintext){

246

gpgme_data_t dh_crypto, dh_plain;

247

gpgme_error_t rc;

248

ssize_t ret;

249

size_t plaintext_capacity = 0;

250

ssize_t plaintext_length = 0;

251

252

if(debug){

252

if (debug){

253

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

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}

255

256

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

257

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

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0);

259

if(rc != GPG_ERR_NO_ERROR){

259

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));

262

return -1;

264

265

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

266

rc = gpgme_data_new(&dh_plain);

267

if(rc != GPG_ERR_NO_ERROR){

267

if (rc != GPG_ERR_NO_ERROR){

268

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

269

gpgme_strsource(rc), gpgme_strerror(rc));

270

gpgme_data_release(dh_crypto);

274

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

275

data buffer */

276

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

277

if(rc != GPG_ERR_NO_ERROR){

277

if (rc != GPG_ERR_NO_ERROR){

278

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

279

gpgme_strsource(rc), gpgme_strerror(rc));

280

plaintext_length = -1;

281

if(debug){

281

if (debug){

282

gpgme_decrypt_result_t result;

283

result = gpgme_op_decrypt_result(mc->ctx);

284

if(result == NULL){

284

if (result == NULL){

285

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

286

} else {

287

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

314

}

315

316

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

317

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

317

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

318

perror("gpgme_data_seek");

319

plaintext_length = -1;

320

goto decrypt_end;

325

plaintext_capacity = adjustbuffer(plaintext,

326

(size_t)plaintext_length,

327

plaintext_capacity);

328

if(plaintext_capacity == 0){

328

if (plaintext_capacity == 0){

329

perror("adjustbuffer");

330

plaintext_length = -1;

331

goto decrypt_end;

334

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

335

BUFFER_SIZE);

336

/* Print the data, if any */

337

if(ret == 0){

337

if (ret == 0){

338

/* EOF */

339

break;

340

}

364

return plaintext_length;

365

}

366

367

static const char * safer_gnutls_strerror(int value) {

368

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

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-Wunreachable-code */

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if(ret == NULL)

367

static const char * safer_gnutls_strerror (int value) {

368

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

369

if (ret == NULL)

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ret = "(unknown)";

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return ret;

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372

}

388

387

}

389

388

390

389

ret = gnutls_global_init();

391

if(ret != GNUTLS_E_SUCCESS) {

392

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

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safer_gnutls_strerror(ret));

390

if (ret != GNUTLS_E_SUCCESS) {

391

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

392

safer_gnutls_strerror(ret));

394

393

return -1;

395

394

}

396

395

397

if(debug){

396

if (debug){

398

397

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

399

398

* - GnuTLS manual

400

399

*/

404

403

405

404

/* OpenPGP credentials */

406

405

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();

406

if (ret != GNUTLS_E_SUCCESS){

407

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

408

warning */

409

safer_gnutls_strerror(ret));

410

gnutls_global_deinit ();

414

411

return -1;

415

412

}

416

413

423

420

ret = gnutls_certificate_set_openpgp_key_file

424

421

(mc->cred, pubkeyfilename, seckeyfilename,

425

422

GNUTLS_OPENPGP_FMT_BASE64);

426

if(ret != GNUTLS_E_SUCCESS) {

423

if (ret != GNUTLS_E_SUCCESS) {

427

424

fprintf(stderr,

428

425

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

429

426

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

434

431

435

432

/* GnuTLS server initialization */

436

433

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));

434

if (ret != GNUTLS_E_SUCCESS) {

435

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

436

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

440

437

goto globalfail;

441

438

}

442

439

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));

440

if (ret != GNUTLS_E_SUCCESS) {

441

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

442

safer_gnutls_strerror(ret));

446

443

goto globalfail;

447

444

}

448

445

463

460

int ret;

464

461

/* GnuTLS session creation */

465

462

ret = gnutls_init(session, GNUTLS_SERVER);

466

if(ret != GNUTLS_E_SUCCESS){

463

if (ret != GNUTLS_E_SUCCESS){

467

464

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

468

465

safer_gnutls_strerror(ret));

469

466

}

471

468

{

472

469

const char *err;

473

470

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

474

if(ret != GNUTLS_E_SUCCESS) {

471

if (ret != GNUTLS_E_SUCCESS) {

475

472

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

476

473

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

477

474

safer_gnutls_strerror(ret));

478

gnutls_deinit(*session);

475

gnutls_deinit (*session);

479

476

return -1;

480

477

}

481

478

}

482

479

483

480

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

484

481

mc->cred);

485

if(ret != GNUTLS_E_SUCCESS) {

482

if (ret != GNUTLS_E_SUCCESS) {

486

483

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

487

484

safer_gnutls_strerror(ret));

488

gnutls_deinit(*session);

485

gnutls_deinit (*session);

489

486

return -1;

490

487

}

491

488

492

489

/* ignore client certificate if any. */

493

gnutls_certificate_server_set_request(*session,

494

GNUTLS_CERT_IGNORE);

490

gnutls_certificate_server_set_request (*session,

491

GNUTLS_CERT_IGNORE);

495

492

496

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

493

gnutls_dh_set_prime_bits (*session, mc->dh_bits);

497

494

498

495

return 0;

499

496

}

507

504

AvahiIfIndex if_index,

508

505

mandos_context *mc){

509

506

int ret, tcp_sd;

510

ssize_t sret;

511

507

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

512

508

char *buffer = NULL;

513

509

char *decrypted_buffer;

519

515

char interface[IF_NAMESIZE];

520

516

gnutls_session_t session;

521

517

522

ret = init_gnutls_session(mc, &session);

523

if(ret != 0){

518

ret = init_gnutls_session (mc, &session);

519

if (ret != 0){

524

520

return -1;

525

521

}

526

522

548

544

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

549

545

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

550

546

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

551

if(ret < 0 ){

547

if (ret < 0 ){

552

548

perror("inet_pton");

553

549

return -1;

554

550

}

556

552

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

557

553

return -1;

558

554

}

559

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

560

-Wconversion and

561

-Wunreachable-code */

555

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

562

556

563

557

to.in6.sin6_scope_id = (uint32_t)if_index;

564

558

577

571

}

578

572

579

573

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

580

if(ret < 0){

574

if (ret < 0){

581

575

perror("connect");

582

576

return -1;

583

577

}

584

578

585

579

const char *out = mandos_protocol_version;

586

580

written = 0;

587

while(true){

581

while (true){

588

582

size_t out_size = strlen(out);

589

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

583

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

590

584

out_size - written));

591

if(ret == -1){

585

if (ret == -1){

592

586

perror("write");

593

587

retval = -1;

594

588

goto mandos_end;

597

591

if(written < out_size){

598

592

continue;

599

593

} else {

600

if(out == mandos_protocol_version){

594

if (out == mandos_protocol_version){

601

595

written = 0;

602

596

out = "\r\n";

603

597

} else {

610

604

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

611

605

}

612

606

613

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

607

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

614

608

615

609

do{

616

ret = gnutls_handshake(session);

610

ret = gnutls_handshake (session);

617

611

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

618

612

619

if(ret != GNUTLS_E_SUCCESS){

613

if (ret != GNUTLS_E_SUCCESS){

620

614

if(debug){

621

615

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

622

gnutls_perror(ret);

616

gnutls_perror (ret);

623

617

}

624

618

retval = -1;

625

619

goto mandos_end;

635

629

while(true){

636

630

buffer_capacity = adjustbuffer(&buffer, buffer_length,

637

631

buffer_capacity);

638

if(buffer_capacity == 0){

632

if (buffer_capacity == 0){

639

633

perror("adjustbuffer");

640

634

retval = -1;

641

635

goto mandos_end;

642

636

}

643

637

644

sret = gnutls_record_recv(session, buffer+buffer_length,

645

BUFFER_SIZE);

646

if(sret == 0){

638

ret = gnutls_record_recv(session, buffer+buffer_length,

639

BUFFER_SIZE);

640

if (ret == 0){

647

641

break;

648

642

}

649

if(sret < 0){

650

switch(sret){

643

if (ret < 0){

644

switch(ret){

651

645

case GNUTLS_E_INTERRUPTED:

652

646

case GNUTLS_E_AGAIN:

653

647

break;

654

648

case GNUTLS_E_REHANDSHAKE:

655

649

do{

656

ret = gnutls_handshake(session);

650

ret = gnutls_handshake (session);

657

651

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

658

if(ret < 0){

652

if (ret < 0){

659

653

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

660

gnutls_perror(ret);

654

gnutls_perror (ret);

661

655

retval = -1;

662

656

goto mandos_end;

663

657

}

666

660

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

667

661

" encrypted session with Mandos server\n");

668

662

retval = -1;

669

gnutls_bye(session, GNUTLS_SHUT_RDWR);

663

gnutls_bye (session, GNUTLS_SHUT_RDWR);

670

664

goto mandos_end;

671

665

}

672

666

} else {

673

buffer_length += (size_t) sret;

667

buffer_length += (size_t) ret;

674

668

}

675

669

}

676

670

678

672

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

679

673

}

680

674

681

gnutls_bye(session, GNUTLS_SHUT_RDWR);

675

gnutls_bye (session, GNUTLS_SHUT_RDWR);

682

676

683

if(buffer_length > 0){

677

if (buffer_length > 0){

684

678

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

685

679

buffer_length,

686

680

&decrypted_buffer);

687

if(decrypted_buffer_size >= 0){

681

if (decrypted_buffer_size >= 0){

688

682

written = 0;

689

683

while(written < (size_t) decrypted_buffer_size){

690

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

691

(size_t)decrypted_buffer_size - written,

692

stdout);

684

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

685

(size_t)decrypted_buffer_size - written,

686

stdout);

693

687

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

694

688

if(debug){

695

689

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

712

706

713

707

mandos_end:

714

708

free(buffer);

715

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

709

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

716

710

if(ret == -1){

717

711

perror("close");

718

712

}

719

gnutls_deinit(session);

713

gnutls_deinit (session);

720

714

return retval;

721

715

}

722

716

740

734

/* Called whenever a service has been resolved successfully or

741

735

timed out */

742

736

743

switch(event) {

737

switch (event) {

744

738

default:

745

739

case AVAHI_RESOLVER_FAILURE:

746

740

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

754

748

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

755

749

if(debug){

756

750

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

757

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

758

ip, (intmax_t)interface, port);

751

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

752

interface, port);

759

753

}

760

754

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

761

if(ret == 0){

755

if (ret == 0){

762

756

avahi_simple_poll_quit(mc->simple_poll);

763

757

}

764

758

}

782

776

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

783

777

is removed from the LAN */

784

778

785

switch(event) {

779

switch (event) {

786

780

default:

787

781

case AVAHI_BROWSER_FAILURE:

788

782

797

791

the callback function is called the Avahi server will free the

798

792

resolver for us. */

799

793

800

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

794

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

801

795

protocol, name, type, domain,

802

796

AVAHI_PROTO_INET6, 0,

803

797

resolve_callback, mc)))

821

815

AvahiSServiceBrowser *sb = NULL;

822

816

int error;

823

817

int ret;

824

intmax_t tmpmax;

825

int numchars;

826

818

int exitcode = EXIT_SUCCESS;

827

819

const char *interface = "eth0";

828

820

struct ifreq network;

874

866

{ .name = NULL }

875

867

};

876

868

877

error_t parse_opt(int key, char *arg,

878

struct argp_state *state) {

879

switch(key) {

869

error_t parse_opt (int key, char *arg,

870

struct argp_state *state) {

871

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

872

a pointer to our plugin list pointer. */

873

switch (key) {

880

874

case 128: /* --debug */

881

875

debug = true;

882

876

break;

893

887

pubkey = arg;

894

888

break;

895

889

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");

890

errno = 0;

891

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

892

if (errno){

893

perror("strtol");

900

894

exit(EXIT_FAILURE);

901

895

}

902

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

903

896

break;

904

897

case 130: /* --priority */

905

898

mc.priority = arg;

906

899

break;

907

900

case ARGP_KEY_ARG:

908

argp_usage(state);

901

argp_usage (state);

909

902

case ARGP_KEY_END:

910

903

break;

911

904

default:

918

911

.args_doc = "",

919

912

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

920

913

" passwords from a Mandos server" };

921

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

922

if(ret == ARGP_ERR_UNKNOWN){

914

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

915

if (ret == ARGP_ERR_UNKNOWN){

923

916

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

924

917

exitcode = EXIT_FAILURE;

925

918

goto end;

950

943

goto end;

951

944

}

952

945

}

953

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

946

ret = TEMP_FAILURE_RETRY(close(sd));

954

947

if(ret == -1){

955

948

perror("close");

956

949

}

960

953

gid = getgid();

961

954

962

955

ret = setuid(uid);

963

if(ret == -1){

956

if (ret == -1){

964

957

perror("setuid");

965

958

}

966

959

967

960

setgid(gid);

968

if(ret == -1){

961

if (ret == -1){

969

962

perror("setgid");

970

963

}

971

964

972

965

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

973

if(ret == -1){

966

if (ret == -1){

974

967

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

975

968

exitcode = EXIT_FAILURE;

976

969

goto end;

1007

1000

exitcode = EXIT_FAILURE;

1008

1001

goto end;

1009

1002

}

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");

1003

errno = 0;

1004

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

1005

if(errno){

1006

perror("Bad port number");

1015

1007

exitcode = EXIT_FAILURE;

1016

1008

goto end;

1017

1009

}

1018

port = (uint16_t)tmpmax;

1019

1010

*address = '\0';

1020

1011

address = connect_to;

1021

1012

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

1027

1018

goto end;

1028

1019

}

1029

1020

1030

if(not debug){

1021

if (not debug){

1031

1022

avahi_set_log_function(empty_log);

1032

1023

}

1033

1024

1036

1027

1037

1028

/* Allocate main Avahi loop object */

1038

1029

mc.simple_poll = avahi_simple_poll_new();

1039

if(mc.simple_poll == NULL) {

1030

if (mc.simple_poll == NULL) {

1040

1031

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

1041

1032

" object.\n");

1042

1033

exitcode = EXIT_FAILURE;

1062

1053

}

1063

1054

1064

1055

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

1065

if(mc.server == NULL) {

1056

if (mc.server == NULL) {

1066

1057

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

1067

1058

avahi_strerror(error));

1068

1059

exitcode = EXIT_FAILURE;

1074

1065

AVAHI_PROTO_INET6,

1075

1066

"_mandos._tcp", NULL, 0,

1076

1067

browse_callback, &mc);

1077

if(sb == NULL) {

1068

if (sb == NULL) {

1078

1069

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

1079

1070

avahi_strerror(avahi_server_errno(mc.server)));

1080

1071

exitcode = EXIT_FAILURE;

1083

1074

1084

1075

/* Run the main loop */

1085

1076

1086

if(debug){

1077

if (debug){

1087

1078

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

1088

1079

}

1089

1080

1091

1082

1092

1083

end:

1093

1084

1094

if(debug){

1085

if (debug){

1095

1086

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

1096

1087

}

1097

1088

1098

1089

/* Cleanup things */

1099

if(sb != NULL)

1090

if (sb != NULL)

1100

1091

avahi_s_service_browser_free(sb);

1101

1092

1102

if(mc.server != NULL)

1093

if (mc.server != NULL)

1103

1094

avahi_server_free(mc.server);

1104

1095

1105

if(mc.simple_poll != NULL)

1096

if (mc.simple_poll != NULL)

1106

1097

avahi_simple_poll_free(mc.simple_poll);

1107

1098

1108

if(gnutls_initalized){

1099

if (gnutls_initalized){

1109

1100

gnutls_certificate_free_credentials(mc.cred);

1110

gnutls_global_deinit();

1101

gnutls_global_deinit ();

1111

1102

gnutls_dh_params_deinit(mc.dh_params);

1112

1103

}

1113

1104

1121

1112

struct dirent *direntry;

1122

1113

d = opendir(tempdir);

1123

1114

if(d == NULL){

1124

if(errno != ENOENT){

1125

perror("opendir");

1126

}

1115

perror("opendir");

1127

1116

} else {

1128

1117

while(true){

1129

1118

direntry = readdir(d);

1130

1119

if(direntry == NULL){

1131

1120

break;

1132

1121

}

1133

if(direntry->d_type == DT_REG){

1122

if (direntry->d_type == DT_REG){

1134

1123

char *fullname = NULL;

1135

1124

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

1136

1125

direntry->d_name);

1149

1138

closedir(d);

1150

1139

}

1151

1140

ret = rmdir(tempdir);

1152

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

1141

if(ret == -1){

1153

1142

perror("rmdir");

1154

1143

}

1155

1144

}