/mandos/trunk : revision 241

1

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

2

/*

3

* 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(), sscanf */

39

stdout, ferror() */

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,

48

#include <sys/types.h> /* socket(), inet_pton(), sockaddr,

49

sockaddr_in6, PF_INET6,

50

SOCK_STREAM, INET6_ADDRSTRLEN,

51

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

52

DIR */

51

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

53

52

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

54

53

#include <sys/socket.h> /* socket(), struct sockaddr_in6,

55

54

struct in6_addr, inet_pton(),

56

55

connect() */

57

56

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

58

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

59

*/

60

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

57

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

58

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

61

59

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

62

60

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

63

61

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

69

67

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

70

68

setgid() */

71

69

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

72

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

70

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

73

71

#include <argp.h> /* struct argp_option, error_t, struct

74

72

argp_state, struct argp,

75

73

argp_parse(), ARGP_KEY_ARG,

92

90

gnutls_*

93

91

init_gnutls_session(),

94

92

GNUTLS_* */

95

#include <gnutls/openpgp.h>

96

/* gnutls_certificate_set_openpgp_key_file(),

93

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

97

94

GNUTLS_OPENPGP_FMT_BASE64 */

98

95

99

96

/* GPGME */

132

129

*/

133

130

size_t adjustbuffer(char **buffer, size_t buffer_length,

134

131

size_t buffer_capacity){

135

if(buffer_length + BUFFER_SIZE > buffer_capacity){

132

if (buffer_length + BUFFER_SIZE > buffer_capacity){

136

133

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

137

if(buffer == NULL){

134

if (buffer == NULL){

138

135

return 0;

139

136

}

140

137

buffer_capacity += BUFFER_SIZE;

159

156

int fd;

160

157

gpgme_data_t pgp_data;

161

158

162

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

159

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

163

160

if(fd == -1){

164

161

perror("open");

165

162

return false;

166

163

}

167

164

168

165

rc = gpgme_data_new_from_fd(&pgp_data, fd);

169

if(rc != GPG_ERR_NO_ERROR){

166

if (rc != GPG_ERR_NO_ERROR){

170

167

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

171

168

gpgme_strsource(rc), gpgme_strerror(rc));

172

169

return false;

173

170

}

174

171

175

172

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

176

if(rc != GPG_ERR_NO_ERROR){

173

if (rc != GPG_ERR_NO_ERROR){

177

174

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

178

175

gpgme_strsource(rc), gpgme_strerror(rc));

179

176

return false;

180

177

}

181

178

182

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

179

ret = TEMP_FAILURE_RETRY(close(fd));

183

180

if(ret == -1){

184

181

perror("close");

185

182

}

187

184

return true;

188

185

}

189

186

190

if(debug){

187

if (debug){

191

188

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

192

189

}

193

190

194

191

/* Init GPGME */

195

192

gpgme_check_version(NULL);

196

193

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

197

if(rc != GPG_ERR_NO_ERROR){

194

if (rc != GPG_ERR_NO_ERROR){

198

195

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

199

196

gpgme_strsource(rc), gpgme_strerror(rc));

200

197

return false;

201

198

}

202

199

203

200

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

204

rc = gpgme_get_engine_info(&engine_info);

205

if(rc != GPG_ERR_NO_ERROR){

201

rc = gpgme_get_engine_info (&engine_info);

202

if (rc != GPG_ERR_NO_ERROR){

206

203

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

207

204

gpgme_strsource(rc), gpgme_strerror(rc));

208

205

return false;

222

219

223

220

/* Create new GPGME "context" */

224

221

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

225

if(rc != GPG_ERR_NO_ERROR){

222

if (rc != GPG_ERR_NO_ERROR){

226

223

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

227

224

gpgme_strsource(rc), gpgme_strerror(rc));

228

225

return false;

229

226

}

230

227

231

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

228

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

232

229

return false;

233

230

}

234

231

239

236

* Decrypt OpenPGP data.

240

237

* Returns -1 on error

241

238

*/

242

static ssize_t pgp_packet_decrypt(const mandos_context *mc,

243

const char *cryptotext,

244

size_t crypto_size,

245

char **plaintext){

239

static ssize_t pgp_packet_decrypt (const mandos_context *mc,

240

const char *cryptotext,

241

size_t crypto_size,

242

char **plaintext){

246

243

gpgme_data_t dh_crypto, dh_plain;

247

244

gpgme_error_t rc;

248

245

ssize_t ret;

249

246

size_t plaintext_capacity = 0;

250

247

ssize_t plaintext_length = 0;

251

248

252

if(debug){

249

if (debug){

253

250

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

254

251

}

255

252

256

253

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

257

254

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

258

255

0);

259

if(rc != GPG_ERR_NO_ERROR){

256

if (rc != GPG_ERR_NO_ERROR){

260

257

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

261

258

gpgme_strsource(rc), gpgme_strerror(rc));

262

259

return -1;

264

261

265

262

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

266

263

rc = gpgme_data_new(&dh_plain);

267

if(rc != GPG_ERR_NO_ERROR){

264

if (rc != GPG_ERR_NO_ERROR){

268

265

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

269

266

gpgme_strsource(rc), gpgme_strerror(rc));

270

267

gpgme_data_release(dh_crypto);

274

271

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

275

272

data buffer */

276

273

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

277

if(rc != GPG_ERR_NO_ERROR){

274

if (rc != GPG_ERR_NO_ERROR){

278

275

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

279

276

gpgme_strsource(rc), gpgme_strerror(rc));

280

277

plaintext_length = -1;

281

if(debug){

278

if (debug){

282

279

gpgme_decrypt_result_t result;

283

280

result = gpgme_op_decrypt_result(mc->ctx);

284

if(result == NULL){

281

if (result == NULL){

285

282

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

286

283

} else {

287

284

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

314

311

}

315

312

316

313

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

317

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

314

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

318

315

perror("gpgme_data_seek");

319

316

plaintext_length = -1;

320

317

goto decrypt_end;

325

322

plaintext_capacity = adjustbuffer(plaintext,

326

323

(size_t)plaintext_length,

327

324

plaintext_capacity);

328

if(plaintext_capacity == 0){

325

if (plaintext_capacity == 0){

329

326

perror("adjustbuffer");

330

327

plaintext_length = -1;

331

328

goto decrypt_end;

334

331

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

335

332

BUFFER_SIZE);

336

333

/* Print the data, if any */

337

if(ret == 0){

334

if (ret == 0){

338

335

/* EOF */

339

336

break;

340

337

}

364

361

return plaintext_length;

365

362

}

366

363

367

static const char * safer_gnutls_strerror(int value) {

368

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

369

-Wunreachable-code */

370

if(ret == NULL)

364

static const char * safer_gnutls_strerror (int value) {

365

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

366

if (ret == NULL)

371

367

ret = "(unknown)";

372

368

return ret;

373

369

}

388

384

}

389

385

390

386

ret = gnutls_global_init();

391

if(ret != GNUTLS_E_SUCCESS) {

392

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

393

safer_gnutls_strerror(ret));

387

if (ret != GNUTLS_E_SUCCESS) {

388

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

389

safer_gnutls_strerror(ret));

394

390

return -1;

395

391

}

396

392

397

if(debug){

393

if (debug){

398

394

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

399

395

* - GnuTLS manual

400

396

*/

404

400

405

401

/* OpenPGP credentials */

406

402

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();

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 ();

414

408

return -1;

415

409

}

416

410

423

417

ret = gnutls_certificate_set_openpgp_key_file

424

418

(mc->cred, pubkeyfilename, seckeyfilename,

425

419

GNUTLS_OPENPGP_FMT_BASE64);

426

if(ret != GNUTLS_E_SUCCESS) {

420

if (ret != GNUTLS_E_SUCCESS) {

427

421

fprintf(stderr,

428

422

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

429

423

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

434

428

435

429

/* GnuTLS server initialization */

436

430

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));

431

if (ret != GNUTLS_E_SUCCESS) {

432

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

433

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

440

434

goto globalfail;

441

435

}

442

436

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));

437

if (ret != GNUTLS_E_SUCCESS) {

438

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

439

safer_gnutls_strerror(ret));

446

440

goto globalfail;

447

441

}

448

442

463

457

int ret;

464

458

/* GnuTLS session creation */

465

459

ret = gnutls_init(session, GNUTLS_SERVER);

466

if(ret != GNUTLS_E_SUCCESS){

460

if (ret != GNUTLS_E_SUCCESS){

467

461

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

468

462

safer_gnutls_strerror(ret));

469

463

}

471

465

{

472

466

const char *err;

473

467

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

474

if(ret != GNUTLS_E_SUCCESS) {

468

if (ret != GNUTLS_E_SUCCESS) {

475

469

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

476

470

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

477

471

safer_gnutls_strerror(ret));

478

gnutls_deinit(*session);

472

gnutls_deinit (*session);

479

473

return -1;

480

474

}

481

475

}

482

476

483

477

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

484

478

mc->cred);

485

if(ret != GNUTLS_E_SUCCESS) {

479

if (ret != GNUTLS_E_SUCCESS) {

486

480

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

487

481

safer_gnutls_strerror(ret));

488

gnutls_deinit(*session);

482

gnutls_deinit (*session);

489

483

return -1;

490

484

}

491

485

492

486

/* ignore client certificate if any. */

493

gnutls_certificate_server_set_request(*session,

494

GNUTLS_CERT_IGNORE);

487

gnutls_certificate_server_set_request (*session,

488

GNUTLS_CERT_IGNORE);

495

489

496

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

490

gnutls_dh_set_prime_bits (*session, mc->dh_bits);

497

491

498

492

return 0;

499

493

}

507

501

AvahiIfIndex if_index,

508

502

mandos_context *mc){

509

503

int ret, tcp_sd;

510

ssize_t sret;

511

504

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

512

505

char *buffer = NULL;

513

506

char *decrypted_buffer;

519

512

char interface[IF_NAMESIZE];

520

513

gnutls_session_t session;

521

514

522

ret = init_gnutls_session(mc, &session);

523

if(ret != 0){

515

ret = init_gnutls_session (mc, &session);

516

if (ret != 0){

524

517

return -1;

525

518

}

526

519

548

541

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

549

542

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

550

543

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

551

if(ret < 0 ){

544

if (ret < 0 ){

552

545

perror("inet_pton");

553

546

return -1;

554

547

}

556

549

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

557

550

return -1;

558

551

}

559

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

560

-Wconversion and

561

-Wunreachable-code */

552

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

562

553

563

554

to.in6.sin6_scope_id = (uint32_t)if_index;

564

555

577

568

}

578

569

579

570

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

580

if(ret < 0){

571

if (ret < 0){

581

572

perror("connect");

582

573

return -1;

583

574

}

584

575

585

576

const char *out = mandos_protocol_version;

586

577

written = 0;

587

while(true){

578

while (true){

588

579

size_t out_size = strlen(out);

589

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

580

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

590

581

out_size - written));

591

if(ret == -1){

582

if (ret == -1){

592

583

perror("write");

593

584

retval = -1;

594

585

goto mandos_end;

597

588

if(written < out_size){

598

589

continue;

599

590

} else {

600

if(out == mandos_protocol_version){

591

if (out == mandos_protocol_version){

601

592

written = 0;

602

593

out = "\r\n";

603

594

} else {

610

601

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

611

602

}

612

603

613

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

604

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

614

605

615

606

do{

616

ret = gnutls_handshake(session);

607

ret = gnutls_handshake (session);

617

608

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

618

609

619

if(ret != GNUTLS_E_SUCCESS){

610

if (ret != GNUTLS_E_SUCCESS){

620

611

if(debug){

621

612

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

622

gnutls_perror(ret);

613

gnutls_perror (ret);

623

614

}

624

615

retval = -1;

625

616

goto mandos_end;

635

626

while(true){

636

627

buffer_capacity = adjustbuffer(&buffer, buffer_length,

637

628

buffer_capacity);

638

if(buffer_capacity == 0){

629

if (buffer_capacity == 0){

639

630

perror("adjustbuffer");

640

631

retval = -1;

641

632

goto mandos_end;

642

633

}

643

634

644

sret = gnutls_record_recv(session, buffer+buffer_length,

645

BUFFER_SIZE);

646

if(sret == 0){

635

ret = gnutls_record_recv(session, buffer+buffer_length,

636

BUFFER_SIZE);

637

if (ret == 0){

647

638

break;

648

639

}

649

if(sret < 0){

650

switch(sret){

640

if (ret < 0){

641

switch(ret){

651

642

case GNUTLS_E_INTERRUPTED:

652

643

case GNUTLS_E_AGAIN:

653

644

break;

654

645

case GNUTLS_E_REHANDSHAKE:

655

646

do{

656

ret = gnutls_handshake(session);

647

ret = gnutls_handshake (session);

657

648

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

658

if(ret < 0){

649

if (ret < 0){

659

650

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

660

gnutls_perror(ret);

651

gnutls_perror (ret);

661

652

retval = -1;

662

653

goto mandos_end;

663

654

}

666

657

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

667

658

" encrypted session with Mandos server\n");

668

659

retval = -1;

669

gnutls_bye(session, GNUTLS_SHUT_RDWR);

660

gnutls_bye (session, GNUTLS_SHUT_RDWR);

670

661

goto mandos_end;

671

662

}

672

663

} else {

673

buffer_length += (size_t) sret;

664

buffer_length += (size_t) ret;

674

665

}

675

666

}

676

667

678

669

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

679

670

}

680

671

681

gnutls_bye(session, GNUTLS_SHUT_RDWR);

672

gnutls_bye (session, GNUTLS_SHUT_RDWR);

682

673

683

if(buffer_length > 0){

674

if (buffer_length > 0){

684

675

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

685

676

buffer_length,

686

677

&decrypted_buffer);

687

if(decrypted_buffer_size >= 0){

678

if (decrypted_buffer_size >= 0){

688

679

written = 0;

689

680

while(written < (size_t) decrypted_buffer_size){

690

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

691

(size_t)decrypted_buffer_size - written,

692

stdout);

681

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

682

(size_t)decrypted_buffer_size - written,

683

stdout);

693

684

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

694

685

if(debug){

695

686

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

712

703

713

704

mandos_end:

714

705

free(buffer);

715

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

706

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

716

707

if(ret == -1){

717

708

perror("close");

718

709

}

719

gnutls_deinit(session);

710

gnutls_deinit (session);

720

711

return retval;

721

712

}

722

713

740

731

/* Called whenever a service has been resolved successfully or

741

732

timed out */

742

733

743

switch(event) {

734

switch (event) {

744

735

default:

745

736

case AVAHI_RESOLVER_FAILURE:

746

737

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

754

745

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

755

746

if(debug){

756

747

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

757

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

758

ip, (intmax_t)interface, port);

748

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

749

interface, port);

759

750

}

760

751

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

761

if(ret == 0){

752

if (ret == 0){

762

753

avahi_simple_poll_quit(mc->simple_poll);

763

754

}

764

755

}

782

773

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

783

774

is removed from the LAN */

784

775

785

switch(event) {

776

switch (event) {

786

777

default:

787

778

case AVAHI_BROWSER_FAILURE:

788

779

797

788

the callback function is called the Avahi server will free the

798

789

resolver for us. */

799

790

800

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

791

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

801

792

protocol, name, type, domain,

802

793

AVAHI_PROTO_INET6, 0,

803

794

resolve_callback, mc)))

821

812

AvahiSServiceBrowser *sb = NULL;

822

813

int error;

823

814

int ret;

824

intmax_t tmpmax;

825

int numchars;

826

815

int exitcode = EXIT_SUCCESS;

827

816

const char *interface = "eth0";

828

817

struct ifreq network;

874

863

{ .name = NULL }

875

864

};

876

865

877

error_t parse_opt(int key, char *arg,

878

struct argp_state *state) {

879

switch(key) {

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) {

880

871

case 128: /* --debug */

881

872

debug = true;

882

873

break;

893

884

pubkey = arg;

894

885

break;

895

886

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");

887

errno = 0;

888

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

889

if (errno){

890

perror("strtol");

900

891

exit(EXIT_FAILURE);

901

892

}

902

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

903

893

break;

904

894

case 130: /* --priority */

905

895

mc.priority = arg;

906

896

break;

907

897

case ARGP_KEY_ARG:

908

argp_usage(state);

898

argp_usage (state);

909

899

case ARGP_KEY_END:

910

900

break;

911

901

default:

918

908

.args_doc = "",

919

909

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

920

910

" passwords from a Mandos server" };

921

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

922

if(ret == ARGP_ERR_UNKNOWN){

911

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

912

if (ret == ARGP_ERR_UNKNOWN){

923

913

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

924

914

exitcode = EXIT_FAILURE;

925

915

goto end;

950

940

goto end;

951

941

}

952

942

}

953

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

943

ret = TEMP_FAILURE_RETRY(close(sd));

954

944

if(ret == -1){

955

945

perror("close");

956

946

}

960

950

gid = getgid();

961

951

962

952

ret = setuid(uid);

963

if(ret == -1){

953

if (ret == -1){

964

954

perror("setuid");

965

955

}

966

956

967

957

setgid(gid);

968

if(ret == -1){

958

if (ret == -1){

969

959

perror("setgid");

970

960

}

971

961

972

962

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

973

if(ret == -1){

963

if (ret == -1){

974

964

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

975

965

exitcode = EXIT_FAILURE;

976

966

goto end;

1007

997

exitcode = EXIT_FAILURE;

1008

998

goto end;

1009

999

}

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");

1000

errno = 0;

1001

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

1002

if(errno){

1003

perror("Bad port number");

1015

1004

exitcode = EXIT_FAILURE;

1016

1005

goto end;

1017

1006

}

1018

port = (uint16_t)tmpmax;

1019

1007

*address = '\0';

1020

1008

address = connect_to;

1021

1009

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

1027

1015

goto end;

1028

1016

}

1029

1017

1030

if(not debug){

1018

if (not debug){

1031

1019

avahi_set_log_function(empty_log);

1032

1020

}

1033

1021

1036

1024

1037

1025

/* Allocate main Avahi loop object */

1038

1026

mc.simple_poll = avahi_simple_poll_new();

1039

if(mc.simple_poll == NULL) {

1027

if (mc.simple_poll == NULL) {

1040

1028

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

1041

1029

" object.\n");

1042

1030

exitcode = EXIT_FAILURE;

1062

1050

}

1063

1051

1064

1052

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

1065

if(mc.server == NULL) {

1053

if (mc.server == NULL) {

1066

1054

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

1067

1055

avahi_strerror(error));

1068

1056

exitcode = EXIT_FAILURE;

1074

1062

AVAHI_PROTO_INET6,

1075

1063

"_mandos._tcp", NULL, 0,

1076

1064

browse_callback, &mc);

1077

if(sb == NULL) {

1065

if (sb == NULL) {

1078

1066

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

1079

1067

avahi_strerror(avahi_server_errno(mc.server)));

1080

1068

exitcode = EXIT_FAILURE;

1083

1071

1084

1072

/* Run the main loop */

1085

1073

1086

if(debug){

1074

if (debug){

1087

1075

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

1088

1076

}

1089

1077

1091

1079

1092

1080

end:

1093

1081

1094

if(debug){

1082

if (debug){

1095

1083

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

1096

1084

}

1097

1085

1098

1086

/* Cleanup things */

1099

if(sb != NULL)

1087

if (sb != NULL)

1100

1088

avahi_s_service_browser_free(sb);

1101

1089

1102

if(mc.server != NULL)

1090

if (mc.server != NULL)

1103

1091

avahi_server_free(mc.server);

1104

1092

1105

if(mc.simple_poll != NULL)

1093

if (mc.simple_poll != NULL)

1106

1094

avahi_simple_poll_free(mc.simple_poll);

1107

1095

1108

if(gnutls_initalized){

1096

if (gnutls_initalized){

1109

1097

gnutls_certificate_free_credentials(mc.cred);

1110

gnutls_global_deinit();

1098

gnutls_global_deinit ();

1111

1099

gnutls_dh_params_deinit(mc.dh_params);

1112

1100

}

1113

1101

1121

1109

struct dirent *direntry;

1122

1110

d = opendir(tempdir);

1123

1111

if(d == NULL){

1124

if(errno != ENOENT){

1125

perror("opendir");

1126

}

1112

perror("opendir");

1127

1113

} else {

1128

1114

while(true){

1129

1115

direntry = readdir(d);

1130

1116

if(direntry == NULL){

1131

1117

break;

1132

1118

}

1133

if(direntry->d_type == DT_REG){

1119

if (direntry->d_type == DT_REG){

1134

1120

char *fullname = NULL;

1135

1121

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

1136

1122

direntry->d_name);

1149

1135

closedir(d);

1150

1136

}

1151

1137

ret = rmdir(tempdir);

1152

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

1138

if(ret == -1){

1153

1139

perror("rmdir");

1154

1140

}

1155

1141

}