/mandos/trunk : revision 266

1

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

2

/*

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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

*

5

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

6

* service browser, downloaded from

9

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

10

*

11

* Everything else is

12

13

12

13

14

*

15

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

16

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

36

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

37

38

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

39

stdout, ferror() */

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stdout, ferror(), sscanf */

40

#include <stdint.h> /* uint16_t, uint32_t */

41

#include <stddef.h> /* NULL, size_t, ssize_t */

42

#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(), DIR */

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

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DIR */

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

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54

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

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

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*/

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#include <inttypes.h> /* PRIu16, SCNu16 */

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61

#include <assert.h> /* assert() */

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62

#include <errno.h> /* perror(), errno */

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63

#include <time.h> /* time() */

67

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

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setgid() */

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71

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

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

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

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73

#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,

90

92

gnutls_*

91

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init_gnutls_session(),

92

94

GNUTLS_* */

93

#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),

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#include <gnutls/openpgp.h>

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/* gnutls_certificate_set_openpgp_key_file(),

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GNUTLS_OPENPGP_FMT_BASE64 */

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/* GPGME */

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*/

130

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size_t adjustbuffer(char **buffer, size_t buffer_length,

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size_t buffer_capacity){

132

if (buffer_length + BUFFER_SIZE > buffer_capacity){

135

if(buffer_length + BUFFER_SIZE > buffer_capacity){

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136

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

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if (buffer == NULL){

137

if(buffer == NULL){

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return 0;

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}

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buffer_capacity += BUFFER_SIZE;

156

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int fd;

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160

gpgme_data_t pgp_data;

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161

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

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fd = (int)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);

166

if (rc != GPG_ERR_NO_ERROR){

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if(rc != GPG_ERR_NO_ERROR){

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170

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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}

178

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ret = TEMP_FAILURE_RETRY(close(fd));

182

ret = (int)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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}

190

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/* Init GPGME */

192

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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){

197

if(rc != GPG_ERR_NO_ERROR){

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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;

198

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}

199

202

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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;

219

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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){

225

if(rc != GPG_ERR_NO_ERROR){

223

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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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}

227

230

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

231

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

229

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return false;

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233

}

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236

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* Decrypt OpenPGP data.

237

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* Returns -1 on error

238

241

*/

239

static ssize_t pgp_packet_decrypt (const mandos_context *mc,

240

const char *cryptotext,

241

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,

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char **plaintext){

243

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gpgme_data_t dh_crypto, dh_plain;

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gpgme_error_t rc;

245

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ssize_t ret;

246

249

size_t plaintext_capacity = 0;

247

250

ssize_t plaintext_length = 0;

248

251

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if (debug){

252

if(debug){

250

253

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

251

254

}

252

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253

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

254

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rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

255

258

0);

256

if (rc != GPG_ERR_NO_ERROR){

259

if(rc != GPG_ERR_NO_ERROR){

257

260

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

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261

gpgme_strsource(rc), gpgme_strerror(rc));

259

262

return -1;

261

264

262

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

263

266

rc = gpgme_data_new(&dh_plain);

264

if (rc != GPG_ERR_NO_ERROR){

267

if(rc != GPG_ERR_NO_ERROR){

265

268

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

266

269

gpgme_strsource(rc), gpgme_strerror(rc));

267

270

gpgme_data_release(dh_crypto);

271

274

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

272

275

data buffer */

273

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

274

if (rc != GPG_ERR_NO_ERROR){

277

if(rc != GPG_ERR_NO_ERROR){

275

278

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

276

279

gpgme_strsource(rc), gpgme_strerror(rc));

277

280

plaintext_length = -1;

278

if (debug){

281

if(debug){

279

282

gpgme_decrypt_result_t result;

280

283

result = gpgme_op_decrypt_result(mc->ctx);

281

if (result == NULL){

284

if(result == NULL){

282

285

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

283

286

} else {

284

287

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

311

314

}

312

315

313

316

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

314

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){

315

318

perror("gpgme_data_seek");

316

319

plaintext_length = -1;

317

320

goto decrypt_end;

322

325

plaintext_capacity = adjustbuffer(plaintext,

323

326

(size_t)plaintext_length,

324

327

plaintext_capacity);

325

if (plaintext_capacity == 0){

328

if(plaintext_capacity == 0){

326

329

perror("adjustbuffer");

327

330

plaintext_length = -1;

328

331

goto decrypt_end;

331

334

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

332

335

BUFFER_SIZE);

333

336

/* Print the data, if any */

334

if (ret == 0){

337

if(ret == 0){

335

338

/* EOF */

336

339

break;

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340

}

361

364

return plaintext_length;

362

365

}

363

366

364

static const char * safer_gnutls_strerror (int value) {

365

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

366

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)

367

370

ret = "(unknown)";

368

371

return ret;

369

372

}

384

387

}

385

388

386

389

ret = gnutls_global_init();

387

if (ret != GNUTLS_E_SUCCESS) {

388

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

389

safer_gnutls_strerror(ret));

390

if(ret != GNUTLS_E_SUCCESS) {

391

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

392

safer_gnutls_strerror(ret));

390

393

return -1;

391

394

}

392

395

393

if (debug){

396

if(debug){

394

397

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

395

398

* - GnuTLS manual

396

399

*/

400

403

401

404

/* OpenPGP credentials */

402

405

gnutls_certificate_allocate_credentials(&mc->cred);

403

if (ret != GNUTLS_E_SUCCESS){

404

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

405

warning */

406

safer_gnutls_strerror(ret));

407

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();

408

411

return -1;

409

412

}

410

413

417

420

ret = gnutls_certificate_set_openpgp_key_file

418

421

(mc->cred, pubkeyfilename, seckeyfilename,

419

422

GNUTLS_OPENPGP_FMT_BASE64);

420

if (ret != GNUTLS_E_SUCCESS) {

423

if(ret != GNUTLS_E_SUCCESS) {

421

424

fprintf(stderr,

422

425

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

423

426

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

428

431

429

432

/* GnuTLS server initialization */

430

433

ret = gnutls_dh_params_init(&mc->dh_params);

431

if (ret != GNUTLS_E_SUCCESS) {

432

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

433

" %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));

434

437

goto globalfail;

435

438

}

436

439

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

437

if (ret != GNUTLS_E_SUCCESS) {

438

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

439

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));

440

443

goto globalfail;

441

444

}

442

445

457

460

int ret;

458

461

/* GnuTLS session creation */

459

462

ret = gnutls_init(session, GNUTLS_SERVER);

460

if (ret != GNUTLS_E_SUCCESS){

463

if(ret != GNUTLS_E_SUCCESS){

461

464

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

462

465

safer_gnutls_strerror(ret));

463

466

}

465

468

{

466

469

const char *err;

467

470

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

468

if (ret != GNUTLS_E_SUCCESS) {

471

if(ret != GNUTLS_E_SUCCESS) {

469

472

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

470

473

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

471

474

safer_gnutls_strerror(ret));

472

gnutls_deinit (*session);

475

gnutls_deinit(*session);

473

476

return -1;

474

477

}

475

478

}

476

479

477

480

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

478

481

mc->cred);

479

if (ret != GNUTLS_E_SUCCESS) {

482

if(ret != GNUTLS_E_SUCCESS) {

480

483

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

481

484

safer_gnutls_strerror(ret));

482

gnutls_deinit (*session);

485

gnutls_deinit(*session);

483

486

return -1;

484

487

}

485

488

486

489

/* ignore client certificate if any. */

487

gnutls_certificate_server_set_request (*session,

488

GNUTLS_CERT_IGNORE);

490

gnutls_certificate_server_set_request(*session,

491

GNUTLS_CERT_IGNORE);

489

492

490

gnutls_dh_set_prime_bits (*session, mc->dh_bits);

493

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

491

494

492

495

return 0;

493

496

}

501

504

AvahiIfIndex if_index,

502

505

mandos_context *mc){

503

506

int ret, tcp_sd;

507

ssize_t sret;

504

508

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

505

509

char *buffer = NULL;

506

510

char *decrypted_buffer;

512

516

char interface[IF_NAMESIZE];

513

517

gnutls_session_t session;

514

518

515

ret = init_gnutls_session (mc, &session);

516

if (ret != 0){

519

ret = init_gnutls_session(mc, &session);

520

if(ret != 0){

517

521

return -1;

518

522

}

519

523

541

545

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

542

546

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

543

547

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

544

if (ret < 0 ){

548

if(ret < 0 ){

545

549

perror("inet_pton");

546

550

return -1;

547

551

}

568

572

}

569

573

570

574

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

571

if (ret < 0){

575

if(ret < 0){

572

576

perror("connect");

573

577

return -1;

574

578

}

575

579

576

580

const char *out = mandos_protocol_version;

577

581

written = 0;

578

while (true){

582

while(true){

579

583

size_t out_size = strlen(out);

580

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

584

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

581

585

out_size - written));

582

if (ret == -1){

586

if(ret == -1){

583

587

perror("write");

584

588

retval = -1;

585

589

goto mandos_end;

588

592

if(written < out_size){

589

593

continue;

590

594

} else {

591

if (out == mandos_protocol_version){

595

if(out == mandos_protocol_version){

592

596

written = 0;

593

597

out = "\r\n";

594

598

} else {

601

605

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

602

606

}

603

607

604

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

608

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

605

609

606

610

do{

607

ret = gnutls_handshake (session);

611

ret = gnutls_handshake(session);

608

612

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

609

613

610

if (ret != GNUTLS_E_SUCCESS){

614

if(ret != GNUTLS_E_SUCCESS){

611

615

if(debug){

612

616

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

613

gnutls_perror (ret);

617

gnutls_perror(ret);

614

618

}

615

619

retval = -1;

616

620

goto mandos_end;

626

630

while(true){

627

631

buffer_capacity = adjustbuffer(&buffer, buffer_length,

628

632

buffer_capacity);

629

if (buffer_capacity == 0){

633

if(buffer_capacity == 0){

630

634

perror("adjustbuffer");

631

635

retval = -1;

632

636

goto mandos_end;

633

637

}

634

638

635

ret = gnutls_record_recv(session, buffer+buffer_length,

636

BUFFER_SIZE);

637

if (ret == 0){

639

sret = gnutls_record_recv(session, buffer+buffer_length,

640

BUFFER_SIZE);

641

if(sret == 0){

638

642

break;

639

643

}

640

if (ret < 0){

641

switch(ret){

644

if(sret < 0){

645

switch(sret){

642

646

case GNUTLS_E_INTERRUPTED:

643

647

case GNUTLS_E_AGAIN:

644

648

break;

645

649

case GNUTLS_E_REHANDSHAKE:

646

650

do{

647

ret = gnutls_handshake (session);

651

ret = gnutls_handshake(session);

648

652

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

649

if (ret < 0){

653

if(ret < 0){

650

654

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

651

gnutls_perror (ret);

655

gnutls_perror(ret);

652

656

retval = -1;

653

657

goto mandos_end;

654

658

}

657

661

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

658

662

" encrypted session with Mandos server\n");

659

663

retval = -1;

660

gnutls_bye (session, GNUTLS_SHUT_RDWR);

664

gnutls_bye(session, GNUTLS_SHUT_RDWR);

661

665

goto mandos_end;

662

666

}

663

667

} else {

664

buffer_length += (size_t) ret;

668

buffer_length += (size_t) sret;

665

669

}

666

670

}

667

671

669

673

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

670

674

}

671

675

672

gnutls_bye (session, GNUTLS_SHUT_RDWR);

676

gnutls_bye(session, GNUTLS_SHUT_RDWR);

673

677

674

if (buffer_length > 0){

678

if(buffer_length > 0){

675

679

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

676

680

buffer_length,

677

681

&decrypted_buffer);

678

if (decrypted_buffer_size >= 0){

682

if(decrypted_buffer_size >= 0){

679

683

written = 0;

680

684

while(written < (size_t) decrypted_buffer_size){

681

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

682

(size_t)decrypted_buffer_size - written,

683

stdout);

685

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

686

(size_t)decrypted_buffer_size - written,

687

stdout);

684

688

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

685

689

if(debug){

686

690

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

703

707

704

708

mandos_end:

705

709

free(buffer);

706

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

710

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

707

711

if(ret == -1){

708

712

perror("close");

709

713

}

710

gnutls_deinit (session);

714

gnutls_deinit(session);

711

715

return retval;

712

716

}

713

717

731

735

/* Called whenever a service has been resolved successfully or

732

736

timed out */

733

737

734

switch (event) {

738

switch(event) {

735

739

default:

736

740

case AVAHI_RESOLVER_FAILURE:

737

741

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

749

753

interface, port);

750

754

}

751

755

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

752

if (ret == 0){

756

if(ret == 0){

753

757

avahi_simple_poll_quit(mc->simple_poll);

754

758

}

755

759

}

773

777

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

774

778

is removed from the LAN */

775

779

776

switch (event) {

780

switch(event) {

777

781

default:

778

782

case AVAHI_BROWSER_FAILURE:

779

783

788

792

the callback function is called the Avahi server will free the

789

793

resolver for us. */

790

794

791

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

795

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

792

796

protocol, name, type, domain,

793

797

AVAHI_PROTO_INET6, 0,

794

798

resolve_callback, mc)))

863

867

{ .name = NULL }

864

868

};

865

869

866

error_t parse_opt (int key, char *arg,

867

struct argp_state *state) {

868

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

869

a pointer to our plugin list pointer. */

870

switch (key) {

870

error_t parse_opt(int key, char *arg,

871

struct argp_state *state) {

872

switch(key) {

871

873

case 128: /* --debug */

872

874

debug = true;

873

875

break;

884

886

pubkey = arg;

885

887

break;

886

888

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

887

errno = 0;

888

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

889

if (errno){

890

perror("strtol");

889

ret = sscanf(arg, "%u", &mc.dh_bits);

890

if(ret != 1){

891

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

891

892

exit(EXIT_FAILURE);

892

893

}

893

894

break;

895

896

mc.priority = arg;

896

897

break;

897

898

case ARGP_KEY_ARG:

898

argp_usage (state);

899

argp_usage(state);

899

900

case ARGP_KEY_END:

900

901

break;

901

902

default:

908

909

.args_doc = "",

909

910

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

910

911

" passwords from a Mandos server" };

911

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

912

if (ret == ARGP_ERR_UNKNOWN){

912

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

913

if(ret == ARGP_ERR_UNKNOWN){

913

914

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

914

915

exitcode = EXIT_FAILURE;

915

916

goto end;

940

941

goto end;

941

942

}

942

943

}

943

ret = TEMP_FAILURE_RETRY(close(sd));

944

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

944

945

if(ret == -1){

945

946

perror("close");

946

947

}

950

951

gid = getgid();

951

952

953

ret = setuid(uid);

953

if (ret == -1){

954

if(ret == -1){

954

955

perror("setuid");

955

956

}

956

957

958

setgid(gid);

958

if (ret == -1){

959

if(ret == -1){

959

960

perror("setgid");

960

961

}

961

962

963

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

963

if (ret == -1){

964

if(ret == -1){

964

965

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

965

966

exitcode = EXIT_FAILURE;

966

967

goto end;

997

998

exitcode = EXIT_FAILURE;

998

999

goto end;

999

1000

}

1000

errno = 0;

1001

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

1002

if(errno){

1003

perror("Bad port number");

1001

uint16_t port;

1002

ret = sscanf(address+1, "%" SCNu16, &port);

1003

if(ret != 1){

1004

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

1004

1005

exitcode = EXIT_FAILURE;

1005

1006

goto end;

1006

1007

}

1015

1016

goto end;

1016

1017

}

1017

1018

if (not debug){

1019

if(not debug){

1019

1020

avahi_set_log_function(empty_log);

1020

1021

}

1021

1022

1024

1025

1026

/* Allocate main Avahi loop object */

1026

1027

mc.simple_poll = avahi_simple_poll_new();

1027

if (mc.simple_poll == NULL) {

1028

if(mc.simple_poll == NULL) {

1028

1029

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

1029

1030

" object.\n");

1030

1031

exitcode = EXIT_FAILURE;

1050

1051

}

1051

1052

1053

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

1053

if (mc.server == NULL) {

1054

if(mc.server == NULL) {

1054

1055

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

1055

1056

avahi_strerror(error));

1056

1057

exitcode = EXIT_FAILURE;

1062

1063

AVAHI_PROTO_INET6,

1063

1064

"_mandos._tcp", NULL, 0,

1064

1065

browse_callback, &mc);

1065

if (sb == NULL) {

1066

if(sb == NULL) {

1066

1067

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

1067

1068

avahi_strerror(avahi_server_errno(mc.server)));

1068

1069

exitcode = EXIT_FAILURE;

1071

1072

1073

/* Run the main loop */

1073

1074

if (debug){

1075

if(debug){

1075

1076

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

1076

1077

}

1077

1078

1079

1080

1081

end:

1081

1082

if (debug){

1083

if(debug){

1083

1084

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

1084

1085

}

1085

1086

1087

/* Cleanup things */

1087

if (sb != NULL)

1088

if(sb != NULL)

1088

1089

avahi_s_service_browser_free(sb);

1089

1090

if (mc.server != NULL)

1091

if(mc.server != NULL)

1091

1092

avahi_server_free(mc.server);

1092

1093

if (mc.simple_poll != NULL)

1094

if(mc.simple_poll != NULL)

1094

1095

avahi_simple_poll_free(mc.simple_poll);

1095

1096

if (gnutls_initalized){

1097

if(gnutls_initalized){

1097

1098

gnutls_certificate_free_credentials(mc.cred);

1098

gnutls_global_deinit ();

1099

gnutls_global_deinit();

1099

1100

gnutls_dh_params_deinit(mc.dh_params);

1100

1101

}

1101

1102

1109

1110

struct dirent *direntry;

1110

1111

d = opendir(tempdir);

1111

1112

if(d == NULL){

1112

perror("opendir");

1113

if(errno != ENOENT){

1114

perror("opendir");

1115

}

1113

1116

} else {

1114

1117

while(true){

1115

1118

direntry = readdir(d);

1116

1119

if(direntry == NULL){

1117

1120

break;

1118

1121

}

1119

if (direntry->d_type == DT_REG){

1122

if(direntry->d_type == DT_REG){

1120

1123

char *fullname = NULL;

1121

1124

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

1122

1125

direntry->d_name);

1135

1138

closedir(d);

1136

1139

}

1137

1140

ret = rmdir(tempdir);

1138

if(ret == -1){

1141

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

1139

1142

perror("rmdir");

1140

1143

}

1141

1144

}