/mandos/trunk : revision 134

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

35

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

36

37

#include <stdio.h>

38

#include <assert.h>

39

#include <stdlib.h>

40

#include <time.h>

41

#include <net/if.h> /* if_nametoindex */

42

#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

43

SIOCSIFFLAGS */

37

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

38

stdout, ferror() */

39

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

40

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

41

#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,

42

srand() */

43

#include <stdbool.h> /* bool, true */

44

#include <string.h> /* memset(), strcmp(), strlen(),

45

strerror(), asprintf(), strcpy() */

46

#include <sys/ioctl.h> /* ioctl */

47

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

48

sockaddr_in6, PF_INET6,

49

SOCK_STREAM, INET6_ADDRSTRLEN,

50

uid_t, gid_t */

51

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

52

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

53

struct in6_addr, inet_pton(),

54

connect() */

55

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

56

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

57

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

44

58

#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

45

SIOCSIFFLAGS */

59

SIOCSIFFLAGS, if_indextoname(),

60

if_nametoindex(), IF_NAMESIZE */

61

#include <unistd.h> /* close(), SEEK_SET, off_t, write(),

62

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

63

setgid() */

64

#include <netinet/in.h>

65

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

66

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

67

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

68

argp_state, struct argp,

69

argp_parse(), ARGP_KEY_ARG,

70

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

46

71

72

/* Avahi */

73

/* All Avahi types, constants and functions

74

Avahi*, avahi_*,

75

AVAHI_* */

47

76

#include <avahi-core/core.h>

48

77

#include <avahi-core/lookup.h>

49

78

#include <avahi-core/log.h>

51

80

#include <avahi-common/malloc.h>

52

81

#include <avahi-common/error.h>

53

82

54

/* Mandos client part */

55

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

56

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

57

struct in6_addr, inet_pton() */

58

#include <gnutls/gnutls.h> /* All GnuTLS stuff */

59

#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */

60

61

#include <unistd.h> /* close() */

62

#include <netinet/in.h>

63

#include <stdbool.h> /* true */

64

#include <string.h> /* memset */

65

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

66

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

67

#include <net/if.h> /* IF_NAMESIZE */

83

/* GnuTLS */

84

#include <gnutls/gnutls.h> /* All GnuTLS types, constants and

85

functions:

86

gnutls_*

87

init_gnutls_session(),

88

GNUTLS_* */

89

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

90

GNUTLS_OPENPGP_FMT_BASE64 */

68

91

69

92

/* GPGME */

70

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

71

#include <gpgme.h>

72

73

/* getopt_long */

74

#include <getopt.h>

93

#include <gpgme.h> /* All GPGME types, constants and

94

functions:

95

gpgme_*

96

GPGME_PROTOCOL_OpenPGP,

97

GPG_ERR_NO_* */

75

98

76

99

#define BUFFER_SIZE 256

77

100

101

bool debug = false;

78

102

static const char *keydir = "/conf/conf.d/mandos";

79

static const char *pubkeyfile = "pubkey.txt";

80

static const char *seckeyfile = "seckey.txt";

81

82

bool debug = false;

83

84

const char mandos_protocol_version[] = "1";

85

86

/* Used for passing in values through all the callback functions */

103

static const char mandos_protocol_version[] = "1";

104

const char *argp_program_version = "password-request 1.0";

105

const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

106

107

/* Used for passing in values through the Avahi callback functions */

87

108

typedef struct {

88

109

AvahiSimplePoll *simple_poll;

89

110

AvahiServer *server;

93

114

const char *priority;

94

115

} mandos_context;

95

116

117

/*

118

* Make room in "buffer" for at least BUFFER_SIZE additional bytes.

119

* "buffer_capacity" is how much is currently allocated,

120

* "buffer_length" is how much is already used.

121

*/

96

122

size_t adjustbuffer(char **buffer, size_t buffer_length,

97

123

size_t buffer_capacity){

98

124

if (buffer_length + BUFFER_SIZE > buffer_capacity){

188

214

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

189

215

gpgme_strsource(rc), gpgme_strerror(rc));

190

216

plaintext_length = -1;

217

if (debug){

218

gpgme_decrypt_result_t result;

219

result = gpgme_op_decrypt_result(ctx);

220

if (result == NULL){

221

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

222

} else {

223

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

224

result->unsupported_algorithm);

225

fprintf(stderr, "Wrong key usage: %u\n",

226

result->wrong_key_usage);

227

if(result->file_name != NULL){

228

fprintf(stderr, "File name: %s\n", result->file_name);

229

}

230

gpgme_recipient_t recipient;

231

recipient = result->recipients;

232

if(recipient){

233

while(recipient != NULL){

234

fprintf(stderr, "Public key algorithm: %s\n",

235

gpgme_pubkey_algo_name(recipient->pubkey_algo));

236

fprintf(stderr, "Key ID: %s\n", recipient->keyid);

237

fprintf(stderr, "Secret key available: %s\n",

238

recipient->status == GPG_ERR_NO_SECKEY

239

? "No" : "Yes");

240

recipient = recipient->next;

241

}

242

}

243

}

244

}

191

245

goto decrypt_end;

192

246

}

193

247

195

249

fprintf(stderr, "Decryption of OpenPGP data succeeded\n");

196

250

}

197

251

198

if (debug){

199

gpgme_decrypt_result_t result;

200

result = gpgme_op_decrypt_result(ctx);

201

if (result == NULL){

202

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

203

} else {

204

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

205

result->unsupported_algorithm);

206

fprintf(stderr, "Wrong key usage: %d\n",

207

result->wrong_key_usage);

208

if(result->file_name != NULL){

209

fprintf(stderr, "File name: %s\n", result->file_name);

210

}

211

gpgme_recipient_t recipient;

212

recipient = result->recipients;

213

if(recipient){

214

while(recipient != NULL){

215

fprintf(stderr, "Public key algorithm: %s\n",

216

gpgme_pubkey_algo_name(recipient->pubkey_algo));

217

fprintf(stderr, "Key ID: %s\n", recipient->keyid);

218

fprintf(stderr, "Secret key available: %s\n",

219

recipient->status == GPG_ERR_NO_SECKEY

220

? "No" : "Yes");

221

recipient = recipient->next;

222

}

223

}

224

}

225

}

226

227

252

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

228

253

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

229

254

perror("pgpme_data_seek");

233

258

234

259

*plaintext = NULL;

235

260

while(true){

236

plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,

261

plaintext_capacity = adjustbuffer(plaintext,

262

(size_t)plaintext_length,

237

263

plaintext_capacity);

238

264

if (plaintext_capacity == 0){

239

265

perror("adjustbuffer");

275

301

}

276

302

277

303

static const char * safer_gnutls_strerror (int value) {

278

const char *ret = gnutls_strerror (value);

304

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

279

305

if (ret == NULL)

280

306

ret = "(unknown)";

281

307

return ret;

287

313

fprintf(stderr, "GnuTLS: %s", string);

288

314

}

289

315

290

static int init_gnutls_global(mandos_context *mc){

316

static int init_gnutls_global(mandos_context *mc,

317

const char *pubkeyfilename,

318

const char *seckeyfilename){

291

319

int ret;

292

320

293

321

if(debug){

294

322

fprintf(stderr, "Initializing GnuTLS\n");

295

323

}

296

297

if ((ret = gnutls_global_init ())

298

!= GNUTLS_E_SUCCESS) {

324

325

ret = gnutls_global_init();

326

if (ret != GNUTLS_E_SUCCESS) {

299

327

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

300

328

safer_gnutls_strerror(ret));

301

329

return -1;

310

338

}

311

339

312

340

/* OpenPGP credentials */

313

if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))

314

!= GNUTLS_E_SUCCESS) {

315

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

341

gnutls_certificate_allocate_credentials(&mc->cred);

342

if (ret != GNUTLS_E_SUCCESS){

343

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

344

warning */

316

345

safer_gnutls_strerror(ret));

346

gnutls_global_deinit ();

317

347

return -1;

318

348

}

319

349

320

350

if(debug){

321

351

fprintf(stderr, "Attempting to use OpenPGP certificate %s"

322

" and keyfile %s as GnuTLS credentials\n", pubkeyfile,

323

seckeyfile);

352

" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,

353

seckeyfilename);

324

354

}

325

355

326

356

ret = gnutls_certificate_set_openpgp_key_file

327

(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);

357

(mc->cred, pubkeyfilename, seckeyfilename,

358

GNUTLS_OPENPGP_FMT_BASE64);

328

359

if (ret != GNUTLS_E_SUCCESS) {

329

360

fprintf(stderr,

330

361

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

331

" '%s')\n", ret, pubkeyfile, seckeyfile);

362

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

332

363

fprintf(stdout, "The GnuTLS error is: %s\n",

333

364

safer_gnutls_strerror(ret));

334

return -1;

365

goto globalfail;

335

366

}

336

367

337

368

/* GnuTLS server initialization */

339

370

if (ret != GNUTLS_E_SUCCESS) {

340

371

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

341

372

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

342

return -1;

373

goto globalfail;

343

374

}

344

375

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

345

376

if (ret != GNUTLS_E_SUCCESS) {

346

377

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

347

378

safer_gnutls_strerror(ret));

348

return -1;

379

goto globalfail;

349

380

}

350

381

351

382

gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);

352

383

353

384

return 0;

385

386

globalfail:

387

388

gnutls_certificate_free_credentials(mc->cred);

389

gnutls_global_deinit();

390

return -1;

391

354

392

}

355

393

356

static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){

394

static int init_gnutls_session(mandos_context *mc,

395

gnutls_session_t *session){

357

396

int ret;

358

397

/* GnuTLS session creation */

359

398

ret = gnutls_init(session, GNUTLS_SERVER);

369

408

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

370

409

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

371

410

safer_gnutls_strerror(ret));

411

gnutls_deinit (*session);

372

412

return -1;

373

413

}

374

414

}

378

418

if (ret != GNUTLS_E_SUCCESS) {

379

419

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

380

420

safer_gnutls_strerror(ret));

421

gnutls_deinit (*session);

381

422

return -1;

382

423

}

383

424

399

440

AvahiIfIndex if_index,

400

441

mandos_context *mc){

401

442

int ret, tcp_sd;

402

struct sockaddr_in6 to;

443

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

403

444

char *buffer = NULL;

404

445

char *decrypted_buffer;

405

446

size_t buffer_length = 0;

409

450

int retval = 0;

410

451

char interface[IF_NAMESIZE];

411

452

gnutls_session_t session;

412

gnutls_dh_params_t dh_params;

413

453

414

454

ret = init_gnutls_session (mc, &session);

415

455

if (ret != 0){

417

457

}

418

458

419

459

if(debug){

420

fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",

421

ip, port);

460

fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16

461

"\n", ip, port);

422

462

}

423

463

424

464

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

435

475

fprintf(stderr, "Binding to interface %s\n", interface);

436

476

}

437

477

438

memset(&to,0,sizeof(to)); /* Spurious warning */

439

to.sin6_family = AF_INET6;

478

memset(&to, 0, sizeof(to));

479

to.in6.sin6_family = AF_INET6;

440

480

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

441

481

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

442

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

482

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

443

483

if (ret < 0 ){

444

484

perror("inet_pton");

445

485

return -1;

448

488

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

449

489

return -1;

450

490

}

451

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

491

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

452

492

453

to.sin6_scope_id = (uint32_t)if_index;

493

to.in6.sin6_scope_id = (uint32_t)if_index;

454

494

455

495

if(debug){

456

fprintf(stderr, "Connection to: %s, port %d\n", ip, port);

496

fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,

497

port);

457

498

char addrstr[INET6_ADDRSTRLEN] = "";

458

if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,

499

if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,

459

500

sizeof(addrstr)) == NULL){

460

501

perror("inet_ntop");

461

502

} else {

465

506

}

466

507

}

467

508

468

ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));

509

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

469

510

if (ret < 0){

470

511

perror("connect");

471

512

return -1;

500

541

}

501

542

502

543

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

503

504

ret = gnutls_handshake (session);

544

545

do{

546

ret = gnutls_handshake (session);

547

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

505

548

506

549

if (ret != GNUTLS_E_SUCCESS){

507

550

if(debug){

520

563

}

521

564

522

565

while(true){

523

buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);

566

buffer_capacity = adjustbuffer(&buffer, buffer_length,

567

buffer_capacity);

524

568

if (buffer_capacity == 0){

525

569

perror("adjustbuffer");

526

570

retval = -1;

538

582

case GNUTLS_E_AGAIN:

539

583

break;

540

584

case GNUTLS_E_REHANDSHAKE:

541

ret = gnutls_handshake (session);

585

do{

586

ret = gnutls_handshake (session);

587

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

542

588

if (ret < 0){

543

589

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

544

590

gnutls_perror (ret);

589

635

} else {

590

636

retval = -1;

591

637

}

638

} else {

639

retval = -1;

592

640

}

593

641

594

642

/* Shutdown procedure */

597

645

free(buffer);

598

646

close(tcp_sd);

599

647

gnutls_deinit (session);

600

gnutls_certificate_free_credentials (mc->cred);

601

gnutls_global_deinit ();

602

648

return retval;

603

649

}

604

650

617

663

flags,

618

664

void* userdata) {

619

665

mandos_context *mc = userdata;

620

assert(r); /* Spurious warning */

666

assert(r);

621

667

622

668

/* Called whenever a service has been resolved successfully or

623

669

timed out */

635

681

char ip[AVAHI_ADDRESS_STR_MAX];

636

682

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

637

683

if(debug){

638

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

639

" port %d\n", name, host_name, ip, interface, port);

684

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

685

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

686

interface, port);

640

687

}

641

688

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

642

689

if (ret == 0){

643

exit(EXIT_SUCCESS);

690

avahi_simple_poll_quit(mc->simple_poll);

644

691

}

645

692

}

646

693

}

658

705

flags,

659

706

void* userdata) {

660

707

mandos_context *mc = userdata;

661

assert(b); /* Spurious warning */

708

assert(b);

662

709

663

710

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

664

711

is removed from the LAN */

700

747

701

748

/* Combines file name and path and returns the malloced new

702

749

string. some sane checks could/should be added */

703

static const char *combinepath(const char *first, const char *second){

704

size_t f_len = strlen(first);

705

size_t s_len = strlen(second);

706

char *tmp = malloc(f_len + s_len + 2);

707

if (tmp == NULL){

750

static char *combinepath(const char *first, const char *second){

751

char *tmp;

752

int ret = asprintf(&tmp, "%s/%s", first, second);

753

if(ret < 0){

708

754

return NULL;

709

755

}

710

if(f_len > 0){

711

memcpy(tmp, first, f_len); /* Spurious warning */

712

}

713

tmp[f_len] = '/';

714

if(s_len > 0){

715

memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */

716

}

717

tmp[f_len + 1 + s_len] = '\0';

718

756

return tmp;

719

757

}

720

758

731

769

gid_t gid;

732

770

char *connect_to = NULL;

733

771

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

772

char *pubkeyfilename = NULL;

773

char *seckeyfilename = NULL;

774

const char *pubkeyname = "pubkey.txt";

775

const char *seckeyname = "seckey.txt";

734

776

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

735

777

.dh_bits = 1024, .priority = "SECURE256"};

778

bool gnutls_initalized = false;

736

779

737

780

{

738

/* Temporary int to get the address of for getopt_long */

739

int debug_int = debug ? 1 : 0;

740

while (true){

741

struct option long_options[] = {

742

{"debug", no_argument, &debug_int, 1},

743

{"connect", required_argument, NULL, 'c'},

744

{"interface", required_argument, NULL, 'i'},

745

{"keydir", required_argument, NULL, 'd'},

746

{"seckey", required_argument, NULL, 's'},

747

{"pubkey", required_argument, NULL, 'p'},

748

{"dh-bits", required_argument, NULL, 'D'},

749

{"priority", required_argument, NULL, 'P'},

750

{0, 0, 0, 0} };

751

752

int option_index = 0;

753

ret = getopt_long (argc, argv, "i:", long_options,

754

&option_index);

755

756

if (ret == -1){

781

struct argp_option options[] = {

782

{ .name = "debug", .key = 128,

783

.doc = "Debug mode", .group = 3 },

784

{ .name = "connect", .key = 'c',

785

.arg = "IP",

786

.doc = "Connect directly to a sepcified mandos server",

787

.group = 1 },

788

{ .name = "interface", .key = 'i',

789

.arg = "INTERFACE",

790

.doc = "Interface that Avahi will conntect through",

791

.group = 1 },

792

{ .name = "keydir", .key = 'd',

793

.arg = "KEYDIR",

794

.doc = "Directory where the openpgp keyring is",

795

.group = 1 },

796

{ .name = "seckey", .key = 's',

797

.arg = "SECKEY",

798

.doc = "Secret openpgp key for gnutls authentication",

799

.group = 1 },

800

{ .name = "pubkey", .key = 'p',

801

.arg = "PUBKEY",

802

.doc = "Public openpgp key for gnutls authentication",

803

.group = 2 },

804

{ .name = "dh-bits", .key = 129,

805

.arg = "BITS",

806

.doc = "dh-bits to use in gnutls communication",

807

.group = 2 },

808

{ .name = "priority", .key = 130,

809

.arg = "PRIORITY",

810

.doc = "GNUTLS priority", .group = 1 },

811

{ .name = NULL }

812

};

813

814

815

error_t parse_opt (int key, char *arg,

816

struct argp_state *state) {

817

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

818

a pointer to our plugin list pointer. */

819

switch (key) {

820

case 128:

821

debug = true;

757

822

break;

758

}

759

760

switch(ret){

761

case 0:

823

case 'c':

824

connect_to = arg;

762

825

break;

763

826

case 'i':

764

interface = optarg;

765

break;

766

case 'c':

767

connect_to = optarg;

827

interface = arg;

768

828

break;

769

829

case 'd':

770

keydir = optarg;

830

keydir = arg;

831

break;

832

case 's':

833

seckeyname = arg;

771

834

break;

772

835

case 'p':

773

pubkeyfile = optarg;

774

break;

775

case 's':

776

seckeyfile = optarg;

777

break;

778

case 'D':

836

pubkeyname = arg;

837

break;

838

case 129:

779

839

errno = 0;

780

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

840

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

781

841

if (errno){

782

842

perror("strtol");

783

843

exit(EXIT_FAILURE);

784

844

}

785

845

break;

786

case 'P':

787

mc.priority = optarg;

788

break;

789

case '?':

846

case 130:

847

mc.priority = arg;

848

break;

849

case ARGP_KEY_ARG:

850

argp_usage (state);

851

case ARGP_KEY_END:

852

break;

790

853

default:

791

/* getopt_long() has already printed a message about the

792

unrcognized option, so just exit. */

793

exit(EXIT_FAILURE);

854

return ARGP_ERR_UNKNOWN;

794

855

}

795

}

796

/* Set the global debug flag from the temporary int */

797

debug = debug_int ? true : false;

798

}

799

800

pubkeyfile = combinepath(keydir, pubkeyfile);

801

if (pubkeyfile == NULL){

802

perror("combinepath");

803

exitcode = EXIT_FAILURE;

804

goto end;

805

}

806

807

seckeyfile = combinepath(keydir, seckeyfile);

808

if (seckeyfile == NULL){

809

perror("combinepath");

810

goto end;

811

}

812

813

ret = init_gnutls_global(&mc);

856

return 0;

857

}

858

859

struct argp argp = { .options = options, .parser = parse_opt,

860

.args_doc = "",

861

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

862

" passwords from mandos server" };

863

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

864

if (ret == ARGP_ERR_UNKNOWN){

865

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

866

exitcode = EXIT_FAILURE;

867

goto end;

868

}

869

}

870

871

pubkeyfilename = combinepath(keydir, pubkeyname);

872

if (pubkeyfilename == NULL){

873

perror("combinepath");

874

exitcode = EXIT_FAILURE;

875

goto end;

876

}

877

878

seckeyfilename = combinepath(keydir, seckeyname);

879

if (seckeyfilename == NULL){

880

perror("combinepath");

881

exitcode = EXIT_FAILURE;

882

goto end;

883

}

884

885

ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);

814

886

if (ret == -1){

815

fprintf(stderr, "init_gnutls_global\n");

887

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

888

exitcode = EXIT_FAILURE;

816

889

goto end;

817

}

818

890

} else {

891

gnutls_initalized = true;

892

}

893

894

/* If the interface is down, bring it up */

895

{

896

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

897

if(sd < 0) {

898

perror("socket");

899

exitcode = EXIT_FAILURE;

900

goto end;

901

}

902

strcpy(network.ifr_name, interface);

903

ret = ioctl(sd, SIOCGIFFLAGS, &network);

904

if(ret == -1){

905

perror("ioctl SIOCGIFFLAGS");

906

exitcode = EXIT_FAILURE;

907

goto end;

908

}

909

if((network.ifr_flags & IFF_UP) == 0){

910

network.ifr_flags |= IFF_UP;

911

ret = ioctl(sd, SIOCSIFFLAGS, &network);

912

if(ret == -1){

913

perror("ioctl SIOCSIFFLAGS");

914

exitcode = EXIT_FAILURE;

915

goto end;

916

}

917

}

918

close(sd);

919

}

920

819

921

uid = getuid();

820

922

gid = getgid();

821

923

822

924

ret = setuid(uid);

823

925

if (ret == -1){

824

926

perror("setuid");

862

964

goto end;

863

965

}

864

966

865

/* If the interface is down, bring it up */

866

{

867

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

868

if(sd < 0) {

869

perror("socket");

870

exitcode = EXIT_FAILURE;

871

goto end;

872

}

873

strcpy(network.ifr_name, interface); /* Spurious warning */

874

ret = ioctl(sd, SIOCGIFFLAGS, &network);

875

if(ret == -1){

876

perror("ioctl SIOCGIFFLAGS");

877

exitcode = EXIT_FAILURE;

878

goto end;

879

}

880

if((network.ifr_flags & IFF_UP) == 0){

881

network.ifr_flags |= IFF_UP;

882

ret = ioctl(sd, SIOCSIFFLAGS, &network);

883

if(ret == -1){

884

perror("ioctl SIOCSIFFLAGS");

885

exitcode = EXIT_FAILURE;

886

goto end;

887

}

888

}

889

close(sd);

890

}

891

892

967

if (not debug){

893

968

avahi_set_log_function(empty_log);

894

969

}

966

1041

967

1042

if (mc.simple_poll != NULL)

968

1043

avahi_simple_poll_free(mc.simple_poll);

969

free(pubkeyfile);

970

free(seckeyfile);

1044

free(pubkeyfilename);

1045

free(seckeyfilename);

1046

1047

if (gnutls_initalized){

1048

gnutls_certificate_free_credentials(mc.cred);

1049

gnutls_global_deinit ();

1050

}

971

1051

972

1052

return exitcode;

973

1053

}