/mandos/trunk : revision 193

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

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

10

*

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* Everything else is

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13

12

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13

*

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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, SCNu16 */

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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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89

gnutls_*

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init_gnutls_session(),

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91

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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#define BUFFER_SIZE 256

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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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112

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;

160

gpgme_data_t pgp_data;

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162

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

162

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

163

if(fd == -1){

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perror("open");

165

return false;

166

}

167

168

rc = gpgme_data_new_from_fd(&pgp_data, fd);

169

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){

176

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;

180

}

181

182

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

182

ret = TEMP_FAILURE_RETRY(close(fd));

183

if(ret == -1){

184

perror("close");

185

}

187

return true;

188

}

189

190

if(debug){

190

if (debug){

191

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

192

}

193

194

/* Init GPGME */

195

gpgme_check_version(NULL);

196

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

197

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));

200

return false;

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}

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);

205

if(rc != GPG_ERR_NO_ERROR){

204

rc = gpgme_get_engine_info (&engine_info);

205

if (rc != GPG_ERR_NO_ERROR){

206

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

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gpgme_strsource(rc), gpgme_strerror(rc));

208

return false;

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/* Create new GPGME "context" */

224

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,

243

const char *cryptotext,

244

size_t crypto_size,

245

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");

254

}

255

256

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

257

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

258

0);

259

if(rc != GPG_ERR_NO_ERROR){

259

if (rc != GPG_ERR_NO_ERROR){

260

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

261

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 */

369

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)

370

ret = "(unknown)";

371

return ret;

372

}

387

}

388

389

ret = gnutls_global_init();

390

if(ret != GNUTLS_E_SUCCESS) {

391

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

392

safer_gnutls_strerror(ret));

390

if (ret != GNUTLS_E_SUCCESS) {

391

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

392

safer_gnutls_strerror(ret));

393

return -1;

394

}

395

396

if(debug){

396

if (debug){

397

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

398

* - GnuTLS manual

399

*/

403

404

/* OpenPGP credentials */

405

gnutls_certificate_allocate_credentials(&mc->cred);

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();

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 ();

411

return -1;

412

}

413

420

ret = gnutls_certificate_set_openpgp_key_file

421

(mc->cred, pubkeyfilename, seckeyfilename,

422

GNUTLS_OPENPGP_FMT_BASE64);

423

if(ret != GNUTLS_E_SUCCESS) {

423

if (ret != GNUTLS_E_SUCCESS) {

424

fprintf(stderr,

425

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

426

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

431

432

/* GnuTLS server initialization */

433

ret = gnutls_dh_params_init(&mc->dh_params);

434

if(ret != GNUTLS_E_SUCCESS) {

435

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

436

" %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));

437

goto globalfail;

438

}

439

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

440

if(ret != GNUTLS_E_SUCCESS) {

441

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

442

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));

443

goto globalfail;

444

}

445

460

int ret;

461

/* GnuTLS session creation */

462

ret = gnutls_init(session, GNUTLS_SERVER);

463

if(ret != GNUTLS_E_SUCCESS){

463

if (ret != GNUTLS_E_SUCCESS){

464

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

465

safer_gnutls_strerror(ret));

466

}

468

{

469

const char *err;

470

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

471

if(ret != GNUTLS_E_SUCCESS) {

471

if (ret != GNUTLS_E_SUCCESS) {

472

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

473

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

474

safer_gnutls_strerror(ret));

475

gnutls_deinit(*session);

475

gnutls_deinit (*session);

476

return -1;

477

}

478

}

479

480

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

481

mc->cred);

482

if(ret != GNUTLS_E_SUCCESS) {

482

if (ret != GNUTLS_E_SUCCESS) {

483

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

484

safer_gnutls_strerror(ret));

485

gnutls_deinit(*session);

485

gnutls_deinit (*session);

486

return -1;

487

}

488

489

/* ignore client certificate if any. */

490

gnutls_certificate_server_set_request(*session,

491

GNUTLS_CERT_IGNORE);

490

gnutls_certificate_server_set_request (*session,

491

GNUTLS_CERT_IGNORE);

492

493

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

493

gnutls_dh_set_prime_bits (*session, mc->dh_bits);

494

495

return 0;

496

}

504

AvahiIfIndex if_index,

505

mandos_context *mc){

506

int ret, tcp_sd;

507

ssize_t sret;

508

507

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

509

508

char *buffer = NULL;

510

509

char *decrypted_buffer;

516

515

char interface[IF_NAMESIZE];

517

516

gnutls_session_t session;

518

517

519

ret = init_gnutls_session(mc, &session);

520

if(ret != 0){

518

ret = init_gnutls_session (mc, &session);

519

if (ret != 0){

521

520

return -1;

522

521

}

523

522

545

544

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

546

545

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

547

546

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

548

if(ret < 0 ){

547

if (ret < 0 ){

549

548

perror("inet_pton");

550

549

return -1;

551

550

}

572

571

}

573

572

574

573

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

575

if(ret < 0){

574

if (ret < 0){

576

575

perror("connect");

577

576

return -1;

578

577

}

579

578

580

579

const char *out = mandos_protocol_version;

581

580

written = 0;

582

while(true){

581

while (true){

583

582

size_t out_size = strlen(out);

584

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

583

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

585

584

out_size - written));

586

if(ret == -1){

585

if (ret == -1){

587

586

perror("write");

588

587

retval = -1;

589

588

goto mandos_end;

592

591

if(written < out_size){

593

592

continue;

594

593

} else {

595

if(out == mandos_protocol_version){

594

if (out == mandos_protocol_version){

596

595

written = 0;

597

596

out = "\r\n";

598

597

} else {

605

604

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

606

605

}

607

606

608

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

607

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

609

608

610

609

do{

611

ret = gnutls_handshake(session);

610

ret = gnutls_handshake (session);

612

611

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

613

612

614

if(ret != GNUTLS_E_SUCCESS){

613

if (ret != GNUTLS_E_SUCCESS){

615

614

if(debug){

616

615

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

617

gnutls_perror(ret);

616

gnutls_perror (ret);

618

617

}

619

618

retval = -1;

620

619

goto mandos_end;

630

629

while(true){

631

630

buffer_capacity = adjustbuffer(&buffer, buffer_length,

632

631

buffer_capacity);

633

if(buffer_capacity == 0){

632

if (buffer_capacity == 0){

634

633

perror("adjustbuffer");

635

634

retval = -1;

636

635

goto mandos_end;

637

636

}

638

637

639

sret = gnutls_record_recv(session, buffer+buffer_length,

640

BUFFER_SIZE);

641

if(sret == 0){

638

ret = gnutls_record_recv(session, buffer+buffer_length,

639

BUFFER_SIZE);

640

if (ret == 0){

642

641

break;

643

642

}

644

if(sret < 0){

645

switch(sret){

643

if (ret < 0){

644

switch(ret){

646

645

case GNUTLS_E_INTERRUPTED:

647

646

case GNUTLS_E_AGAIN:

648

647

break;

649

648

case GNUTLS_E_REHANDSHAKE:

650

649

do{

651

ret = gnutls_handshake(session);

650

ret = gnutls_handshake (session);

652

651

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

653

if(ret < 0){

652

if (ret < 0){

654

653

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

655

gnutls_perror(ret);

654

gnutls_perror (ret);

656

655

retval = -1;

657

656

goto mandos_end;

658

657

}

661

660

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

662

661

" encrypted session with Mandos server\n");

663

662

retval = -1;

664

gnutls_bye(session, GNUTLS_SHUT_RDWR);

663

gnutls_bye (session, GNUTLS_SHUT_RDWR);

665

664

goto mandos_end;

666

665

}

667

666

} else {

668

buffer_length += (size_t) sret;

667

buffer_length += (size_t) ret;

669

668

}

670

669

}

671

670

673

672

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

674

673

}

675

674

676

gnutls_bye(session, GNUTLS_SHUT_RDWR);

675

gnutls_bye (session, GNUTLS_SHUT_RDWR);

677

676

678

if(buffer_length > 0){

677

if (buffer_length > 0){

679

678

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

680

679

buffer_length,

681

680

&decrypted_buffer);

682

if(decrypted_buffer_size >= 0){

681

if (decrypted_buffer_size >= 0){

683

682

written = 0;

684

683

while(written < (size_t) decrypted_buffer_size){

685

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

686

(size_t)decrypted_buffer_size - written,

687

stdout);

684

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

685

(size_t)decrypted_buffer_size - written,

686

stdout);

688

687

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

689

688

if(debug){

690

689

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

707

706

708

707

mandos_end:

709

708

free(buffer);

710

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

709

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

711

710

if(ret == -1){

712

711

perror("close");

713

712

}

714

gnutls_deinit(session);

713

gnutls_deinit (session);

715

714

return retval;

716

715

}

717

716

735

734

/* Called whenever a service has been resolved successfully or

736

735

timed out */

737

736

738

switch(event) {

737

switch (event) {

739

738

default:

740

739

case AVAHI_RESOLVER_FAILURE:

741

740

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

753

752

interface, port);

754

753

}

755

754

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

756

if(ret == 0){

755

if (ret == 0){

757

756

avahi_simple_poll_quit(mc->simple_poll);

758

757

}

759

758

}

777

776

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

778

777

is removed from the LAN */

779

778

780

switch(event) {

779

switch (event) {

781

780

default:

782

781

case AVAHI_BROWSER_FAILURE:

783

782

792

791

the callback function is called the Avahi server will free the

793

792

resolver for us. */

794

793

795

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

794

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

796

795

protocol, name, type, domain,

797

796

AVAHI_PROTO_INET6, 0,

798

797

resolve_callback, mc)))

867

866

{ .name = NULL }

868

867

};

869

868

870

error_t parse_opt(int key, char *arg,

871

struct argp_state *state) {

872

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) {

873

874

case 128: /* --debug */

874

875

debug = true;

875

876

break;

886

887

pubkey = arg;

887

888

break;

888

889

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

889

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

890

if(ret != 1){

891

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");

892

894

exit(EXIT_FAILURE);

893

895

}

894

896

break;

896

898

mc.priority = arg;

897

899

break;

898

900

case ARGP_KEY_ARG:

899

argp_usage(state);

901

argp_usage (state);

900

902

case ARGP_KEY_END:

901

903

break;

902

904

default:

909

911

.args_doc = "",

910

912

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

911

913

" passwords from a Mandos server" };

912

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

913

if(ret == ARGP_ERR_UNKNOWN){

914

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

915

if (ret == ARGP_ERR_UNKNOWN){

914

916

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

915

917

exitcode = EXIT_FAILURE;

916

918

goto end;

941

943

goto end;

942

944

}

943

945

}

944

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

946

ret = TEMP_FAILURE_RETRY(close(sd));

945

947

if(ret == -1){

946

948

perror("close");

947

949

}

951

953

gid = getgid();

952

954

953

955

ret = setuid(uid);

954

if(ret == -1){

956

if (ret == -1){

955

957

perror("setuid");

956

958

}

957

959

958

960

setgid(gid);

959

if(ret == -1){

961

if (ret == -1){

960

962

perror("setgid");

961

963

}

962

964

963

965

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

964

if(ret == -1){

966

if (ret == -1){

965

967

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

966

968

exitcode = EXIT_FAILURE;

967

969

goto end;

998

1000

exitcode = EXIT_FAILURE;

999

1001

goto end;

1000

1002

}

1001

uint16_t port;

1002

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

1003

if(ret != 1){

1004

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");

1005

1007

exitcode = EXIT_FAILURE;

1006

1008

goto end;

1007

1009

}

1016

1018

goto end;

1017

1019

}

1018

1020

1019

if(not debug){

1021

if (not debug){

1020

1022

avahi_set_log_function(empty_log);

1021

1023

}

1022

1024

1025

1027

1026

1028

/* Allocate main Avahi loop object */

1027

1029

mc.simple_poll = avahi_simple_poll_new();

1028

if(mc.simple_poll == NULL) {

1030

if (mc.simple_poll == NULL) {

1029

1031

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

1030

1032

" object.\n");

1031

1033

exitcode = EXIT_FAILURE;

1051

1053

}

1052

1054

1053

1055

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

1054

if(mc.server == NULL) {

1056

if (mc.server == NULL) {

1055

1057

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

1056

1058

avahi_strerror(error));

1057

1059

exitcode = EXIT_FAILURE;

1063

1065

AVAHI_PROTO_INET6,

1064

1066

"_mandos._tcp", NULL, 0,

1065

1067

browse_callback, &mc);

1066

if(sb == NULL) {

1068

if (sb == NULL) {

1067

1069

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

1068

1070

avahi_strerror(avahi_server_errno(mc.server)));

1069

1071

exitcode = EXIT_FAILURE;

1072

1074

1073

1075

/* Run the main loop */

1074

1076

1075

if(debug){

1077

if (debug){

1076

1078

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

1077

1079

}

1078

1080

1082

1081

1083

end:

1082

1084

1083

if(debug){

1085

if (debug){

1084

1086

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

1085

1087

}

1086

1088

1087

1089

/* Cleanup things */

1088

if(sb != NULL)

1090

if (sb != NULL)

1089

1091

avahi_s_service_browser_free(sb);

1090

1092

1091

if(mc.server != NULL)

1093

if (mc.server != NULL)

1092

1094

avahi_server_free(mc.server);

1093

1095

1094

if(mc.simple_poll != NULL)

1096

if (mc.simple_poll != NULL)

1095

1097

avahi_simple_poll_free(mc.simple_poll);

1096

1098

1097

if(gnutls_initalized){

1099

if (gnutls_initalized){

1098

1100

gnutls_certificate_free_credentials(mc.cred);

1099

gnutls_global_deinit();

1101

gnutls_global_deinit ();

1100

1102

gnutls_dh_params_deinit(mc.dh_params);

1101

1103

}

1102

1104

1110

1112

struct dirent *direntry;

1111

1113

d = opendir(tempdir);

1112

1114

if(d == NULL){

1113

if(errno != ENOENT){

1114

perror("opendir");

1115

}

1115

perror("opendir");

1116

} else {

1117

while(true){

1118

direntry = readdir(d);

1119

if(direntry == NULL){

1120

break;

1121

}

1122

if(direntry->d_type == DT_REG){

1122

if (direntry->d_type == DT_REG){

1123

char *fullname = NULL;

1124

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

1125

direntry->d_name);

1138

closedir(d);

1139

}

1140

ret = rmdir(tempdir);

1141

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

1141

if(ret == -1){

1142

perror("rmdir");

1143

}

1144

}