/mandos/release : revision 24.1.12

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

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

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

36

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() */

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 */

58

44

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

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 */

45

SIOCSIFFLAGS */

71

46

72

/* Avahi */

73

/* All Avahi types, constants and functions

74

Avahi*, avahi_*,

75

AVAHI_* */

76

47

#include <avahi-core/core.h>

77

48

#include <avahi-core/lookup.h>

78

49

#include <avahi-core/log.h>

80

51

#include <avahi-common/malloc.h>

81

52

#include <avahi-common/error.h>

82

53

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 */

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 */

91

68

92

69

/* GPGME */

93

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

94

functions:

95

gpgme_*

96

GPGME_PROTOCOL_OpenPGP,

97

GPG_ERR_NO_* */

70

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

71

#include <gpgme.h>

72

73

/* getopt_long */

74

#include <getopt.h>

98

75

99

76

#define BUFFER_SIZE 256

100

77

78

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

79

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

80

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

81

101

82

bool debug = false;

102

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

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 */

83

84

const char mandos_protocol_version[] = "1";

85

86

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

108

87

typedef struct {

109

88

AvahiSimplePoll *simple_poll;

110

89

AvahiServer *server;

111

90

gnutls_certificate_credentials_t cred;

112

91

unsigned int dh_bits;

113

gnutls_dh_params_t dh_params;

114

92

const char *priority;

115

93

} mandos_context;

116

94

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

*/

122

95

size_t adjustbuffer(char **buffer, size_t buffer_length,

123

96

size_t buffer_capacity){

124

97

if (buffer_length + BUFFER_SIZE > buffer_capacity){

214

187

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

215

188

gpgme_strsource(rc), gpgme_strerror(rc));

216

189

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

}

245

190

goto decrypt_end;

246

191

}

247

192

249

194

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

250

195

}

251

196

197

if (debug){

198

gpgme_decrypt_result_t result;

199

result = gpgme_op_decrypt_result(ctx);

200

if (result == NULL){

201

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

202

} else {

203

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

204

result->unsupported_algorithm);

205

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

206

result->wrong_key_usage);

207

if(result->file_name != NULL){

208

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

209

}

210

gpgme_recipient_t recipient;

211

recipient = result->recipients;

212

if(recipient){

213

while(recipient != NULL){

214

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

215

gpgme_pubkey_algo_name(recipient->pubkey_algo));

216

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

217

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

218

recipient->status == GPG_ERR_NO_SECKEY

219

? "No" : "Yes");

220

recipient = recipient->next;

221

}

222

}

223

}

224

}

225

252

226

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

253

227

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

254

228

perror("pgpme_data_seek");

258

232

259

233

*plaintext = NULL;

260

234

while(true){

261

plaintext_capacity = adjustbuffer(plaintext,

262

(size_t)plaintext_length,

235

plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,

263

236

plaintext_capacity);

264

237

if (plaintext_capacity == 0){

265

238

perror("adjustbuffer");

301

274

}

302

275

303

276

static const char * safer_gnutls_strerror (int value) {

304

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

277

const char *ret = gnutls_strerror (value);

305

278

if (ret == NULL)

306

279

ret = "(unknown)";

307

280

return ret;

313

286

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

314

287

}

315

288

316

static int init_gnutls_global(mandos_context *mc,

317

const char *pubkeyfilename,

318

const char *seckeyfilename){

289

static int initgnutls(mandos_context *mc, gnutls_session_t *session,

290

gnutls_dh_params_t *dh_params){

319

291

int ret;

320

292

321

293

if(debug){

322

294

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

323

295

}

324

325

ret = gnutls_global_init();

326

if (ret != GNUTLS_E_SUCCESS) {

296

297

if ((ret = gnutls_global_init ())

298

!= GNUTLS_E_SUCCESS) {

327

299

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

328

300

safer_gnutls_strerror(ret));

329

301

return -1;

338

310

}

339

311

340

312

/* OpenPGP credentials */

341

gnutls_certificate_allocate_credentials(&mc->cred);

342

if (ret != GNUTLS_E_SUCCESS){

343

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

344

warning */

313

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

314

!= GNUTLS_E_SUCCESS) {

315

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

345

316

safer_gnutls_strerror(ret));

346

gnutls_global_deinit ();

347

317

return -1;

348

318

}

349

319

350

320

if(debug){

351

321

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

352

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

353

seckeyfilename);

322

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

323

seckeyfile);

354

324

}

355

325

356

326

ret = gnutls_certificate_set_openpgp_key_file

357

(mc->cred, pubkeyfilename, seckeyfilename,

358

GNUTLS_OPENPGP_FMT_BASE64);

327

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

359

328

if (ret != GNUTLS_E_SUCCESS) {

360

329

fprintf(stderr,

361

330

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

362

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

331

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

363

332

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

364

333

safer_gnutls_strerror(ret));

365

goto globalfail;

334

return -1;

366

335

}

367

336

368

337

/* GnuTLS server initialization */

369

ret = gnutls_dh_params_init(&mc->dh_params);

338

ret = gnutls_dh_params_init(dh_params);

370

339

if (ret != GNUTLS_E_SUCCESS) {

371

340

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

372

341

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

373

goto globalfail;

342

return -1;

374

343

}

375

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

344

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

376

345

if (ret != GNUTLS_E_SUCCESS) {

377

346

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

378

347

safer_gnutls_strerror(ret));

379

goto globalfail;

348

return -1;

380

349

}

381

350

382

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

383

384

return 0;

385

386

globalfail:

387

388

gnutls_certificate_free_credentials(mc->cred);

389

gnutls_global_deinit();

390

return -1;

391

392

}

393

394

static int init_gnutls_session(mandos_context *mc,

395

gnutls_session_t *session){

396

int ret;

351

gnutls_certificate_set_dh_params(mc->cred, *dh_params);

352

397

353

/* GnuTLS session creation */

398

354

ret = gnutls_init(session, GNUTLS_SERVER);

399

355

if (ret != GNUTLS_E_SUCCESS){

408

364

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

409

365

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

410

366

safer_gnutls_strerror(ret));

411

gnutls_deinit (*session);

412

367

return -1;

413

368

}

414

369

}

418

373

if (ret != GNUTLS_E_SUCCESS) {

419

374

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

420

375

safer_gnutls_strerror(ret));

421

gnutls_deinit (*session);

422

376

return -1;

423

377

}

424

378

440

394

AvahiIfIndex if_index,

441

395

mandos_context *mc){

442

396

int ret, tcp_sd;

443

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

397

struct sockaddr_in6 to;

444

398

char *buffer = NULL;

445

399

char *decrypted_buffer;

446

400

size_t buffer_length = 0;

450

404

int retval = 0;

451

405

char interface[IF_NAMESIZE];

452

406

gnutls_session_t session;

407

gnutls_dh_params_t dh_params;

453

408

454

ret = init_gnutls_session (mc, &session);

409

ret = initgnutls (mc, &session, &dh_params);

455

410

if (ret != 0){

456

411

return -1;

457

412

}

458

413

459

414

if(debug){

460

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

461

"\n", ip, port);

415

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

416

ip, port);

462

417

}

463

418

464

419

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

475

430

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

476

431

}

477

432

478

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

479

to.in6.sin6_family = AF_INET6;

433

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

434

to.sin6_family = AF_INET6;

480

435

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

481

436

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

482

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

437

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

483

438

if (ret < 0 ){

484

439

perror("inet_pton");

485

440

return -1;

488

443

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

489

444

return -1;

490

445

}

491

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

446

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

492

447

493

to.in6.sin6_scope_id = (uint32_t)if_index;

448

to.sin6_scope_id = (uint32_t)if_index;

494

449

495

450

if(debug){

496

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

497

port);

451

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

498

452

char addrstr[INET6_ADDRSTRLEN] = "";

499

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

453

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

500

454

sizeof(addrstr)) == NULL){

501

455

perror("inet_ntop");

502

456

} else {

506

460

}

507

461

}

508

462

509

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

463

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

510

464

if (ret < 0){

511

465

perror("connect");

512

466

return -1;

541

495

}

542

496

543

497

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

544

545

do{

546

ret = gnutls_handshake (session);

547

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

498

499

ret = gnutls_handshake (session);

548

500

549

501

if (ret != GNUTLS_E_SUCCESS){

550

502

if(debug){

563

515

}

564

516

565

517

while(true){

566

buffer_capacity = adjustbuffer(&buffer, buffer_length,

567

buffer_capacity);

518

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

568

519

if (buffer_capacity == 0){

569

520

perror("adjustbuffer");

570

521

retval = -1;

582

533

case GNUTLS_E_AGAIN:

583

534

break;

584

535

case GNUTLS_E_REHANDSHAKE:

585

do{

586

ret = gnutls_handshake (session);

587

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

536

ret = gnutls_handshake (session);

588

537

if (ret < 0){

589

538

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

590

539

gnutls_perror (ret);

635

584

} else {

636

585

retval = -1;

637

586

}

638

} else {

639

retval = -1;

640

587

}

641

588

642

589

/* Shutdown procedure */

645

592

free(buffer);

646

593

close(tcp_sd);

647

594

gnutls_deinit (session);

595

gnutls_certificate_free_credentials (mc->cred);

596

gnutls_global_deinit ();

648

597

return retval;

649

598

}

650

599

663

612

flags,

664

613

void* userdata) {

665

614

mandos_context *mc = userdata;

666

assert(r);

615

assert(r); /* Spurious warning */

667

616

668

617

/* Called whenever a service has been resolved successfully or

669

618

timed out */

681

630

char ip[AVAHI_ADDRESS_STR_MAX];

682

631

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

683

632

if(debug){

684

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

685

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

686

interface, port);

633

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

634

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

687

635

}

688

636

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

689

637

if (ret == 0){

690

avahi_simple_poll_quit(mc->simple_poll);

638

exit(EXIT_SUCCESS);

691

639

}

692

640

}

693

641

}

705

653

flags,

706

654

void* userdata) {

707

655

mandos_context *mc = userdata;

708

assert(b);

656

assert(b); /* Spurious warning */

709

657

710

658

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

711

659

is removed from the LAN */

747

695

748

696

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

749

697

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

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){

698

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

699

size_t f_len = strlen(first);

700

size_t s_len = strlen(second);

701

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

702

if (tmp == NULL){

754

703

return NULL;

755

704

}

705

if(f_len > 0){

706

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

707

}

708

tmp[f_len] = '/';

709

if(s_len > 0){

710

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

711

}

712

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

756

713

return tmp;

757

714

}

758

715

765

722

const char *interface = "eth0";

766

723

struct ifreq network;

767

724

int sd;

768

uid_t uid;

769

gid_t gid;

770

725

char *connect_to = NULL;

771

726

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";

776

727

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

777

728

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

778

bool gnutls_initalized = false;

779

729

780

730

{

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;

731

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

732

int debug_int = debug ? 1 : 0;

733

while (true){

734

struct option long_options[] = {

735

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

736

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

737

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

738

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

739

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

740

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

741

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

742

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

743

{0, 0, 0, 0} };

744

745

int option_index = 0;

746

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

747

&option_index);

748

749

if (ret == -1){

750

break;

751

}

752

753

switch(ret){

754

case 0:

755

break;

756

case 'i':

757

interface = optarg;

822

758

break;

823

759

case 'c':

824

connect_to = arg;

825

break;

826

case 'i':

827

interface = arg;

760

connect_to = optarg;

828

761

break;

829

762

case 'd':

830

keydir = arg;

763

keydir = optarg;

764

break;

765

case 'p':

766

pubkeyfile = optarg;

831

767

break;

832

768

case 's':

833

seckeyname = arg;

834

break;

835

case 'p':

836

pubkeyname = arg;

837

break;

838

case 129:

769

seckeyfile = optarg;

770

break;

771

case 'D':

839

772

errno = 0;

840

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

773

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

841

774

if (errno){

842

775

perror("strtol");

843

776

exit(EXIT_FAILURE);

844

777

}

845

778

break;

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;

779

case 'P':

780

mc.priority = optarg;

781

break;

782

case '?':

853

783

default:

854

return ARGP_ERR_UNKNOWN;

855

}

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);

886

if (ret == -1){

887

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

888

exitcode = EXIT_FAILURE;

889

goto end;

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

921

uid = getuid();

922

gid = getgid();

923

924

ret = setuid(uid);

925

if (ret == -1){

926

perror("setuid");

927

}

928

929

setgid(gid);

930

if (ret == -1){

931

perror("setgid");

784

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

785

unrcognized option, so just exit. */

786

exit(EXIT_FAILURE);

787

}

788

}

789

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

790

debug = debug_int ? true : false;

791

}

792

793

pubkeyfile = combinepath(keydir, pubkeyfile);

794

if (pubkeyfile == NULL){

795

perror("combinepath");

796

exitcode = EXIT_FAILURE;

797

goto end;

798

}

799

800

seckeyfile = combinepath(keydir, seckeyfile);

801

if (seckeyfile == NULL){

802

perror("combinepath");

803

goto end;

932

804

}

933

805

934

806

if_index = (AvahiIfIndex) if_nametoindex(interface);

943

815

char *address = strrchr(connect_to, ':');

944

816

if(address == NULL){

945

817

fprintf(stderr, "No colon in address\n");

946

exitcode = EXIT_FAILURE;

947

goto end;

818

exit(EXIT_FAILURE);

948

819

}

949

820

errno = 0;

950

821

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

951

822

if(errno){

952

823

perror("Bad port number");

953

exitcode = EXIT_FAILURE;

954

goto end;

824

exit(EXIT_FAILURE);

955

825

}

956

826

*address = '\0';

957

827

address = connect_to;

958

828

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

959

829

if(ret < 0){

960

exitcode = EXIT_FAILURE;

830

exit(EXIT_FAILURE);

961

831

} else {

962

exitcode = EXIT_SUCCESS;

963

}

964

goto end;

832

exit(EXIT_SUCCESS);

833

}

834

}

835

836

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

837

{

838

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

839

if(sd < 0) {

840

perror("socket");

841

exitcode = EXIT_FAILURE;

842

goto end;

843

}

844

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

845

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

846

if(ret == -1){

847

perror("ioctl SIOCGIFFLAGS");

848

exitcode = EXIT_FAILURE;

849

goto end;

850

}

851

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

852

network.ifr_flags |= IFF_UP;

853

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

854

if(ret == -1){

855

perror("ioctl SIOCSIFFLAGS");

856

exitcode = EXIT_FAILURE;

857

goto end;

858

}

859

}

860

close(sd);

965

861

}

966

862

967

863

if (not debug){

1041

937

1042

938

if (mc.simple_poll != NULL)

1043

939

avahi_simple_poll_free(mc.simple_poll);

1044

free(pubkeyfilename);

1045

free(seckeyfilename);

1046

1047

if (gnutls_initalized){

1048

gnutls_certificate_free_credentials(mc.cred);

1049

gnutls_global_deinit ();

1050

}

940

free(pubkeyfile);

941

free(seckeyfile);

1051

942

1052

943

return exitcode;

1053

944

}