/mandos/release : revision 237.7.309

9

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

10

*

11

* Everything else is

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13

14

*

15

* This file is part of Mandos.

16

*

17

* Mandos is free software: you can redistribute it and/or modify it

18

* under the terms of the GNU General Public License as published by

19

* the Free Software Foundation, either version 3 of the License, or

20

* (at your option) any later version.

21

*

22

* Mandos is distributed in the hope that it will be useful, but

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13

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*

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

17

* published by the Free Software Foundation, either version 3 of the

18

* License, or (at your option) any later version.

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*

20

* This program is distributed in the hope that it will be useful, but

23

21

* WITHOUT ANY WARRANTY; without even the implied warranty of

24

22

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

25

23

* General Public License for more details.

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24

*

27

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* You should have received a copy of the GNU General Public License

28

* along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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* along with this program. If not, see

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* <http://www.gnu.org/licenses/>.

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28

*

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29

* Contact the authors at <mandos@recompile.se>.

31

30

*/

47

46

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

48

47

strtof(), abort() */

49

48

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

50

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

51

asprintf(), strncpy(), strsignal()

52

*/

49

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

50

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

53

51

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

54

52

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

55

53

sockaddr_in6, PF_INET6,

59

57

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

60

58

inet_pton(), connect(),

61

59

getnameinfo() */

62

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

60

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

63

61

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

64

62

*/

65

63

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

66

64

strtoimax() */

67

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

68

EAI_SYSTEM, ENETUNREACH,

69

EHOSTUNREACH, ECONNREFUSED, EPROTO,

70

EIO, ENOENT, ENXIO, ENOMEM, EISDIR,

71

ENOTEMPTY,

65

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

72

66

program_invocation_short_name */

73

67

#include <time.h> /* nanosleep(), time(), sleep() */

74

68

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

272

266

return true;

273

267

}

274

268

275

/* Set effective uid to 0, return errno */

276

__attribute__((warn_unused_result))

277

int raise_privileges(void){

278

int old_errno = errno;

279

int ret = 0;

280

if(seteuid(0) == -1){

281

ret = errno;

282

}

283

errno = old_errno;

284

return ret;

285

}

286

287

/* Set effective and real user ID to 0. Return errno. */

288

__attribute__((warn_unused_result))

289

int raise_privileges_permanently(void){

290

int old_errno = errno;

291

int ret = raise_privileges();

292

if(ret != 0){

293

errno = old_errno;

294

return ret;

295

}

296

if(setuid(0) == -1){

297

ret = errno;

298

}

299

errno = old_errno;

300

return ret;

301

}

302

303

/* Set effective user ID to unprivileged saved user ID */

304

__attribute__((warn_unused_result))

305

int lower_privileges(void){

306

int old_errno = errno;

307

int ret = 0;

308

if(seteuid(uid) == -1){

309

ret = errno;

310

}

311

errno = old_errno;

312

return ret;

313

}

314

315

/* Lower privileges permanently */

316

__attribute__((warn_unused_result))

317

int lower_privileges_permanently(void){

318

int old_errno = errno;

319

int ret = 0;

320

if(setuid(uid) == -1){

321

ret = errno;

322

}

323

errno = old_errno;

324

return ret;

325

}

326

327

269

/*

328

270

* Initialize GPGME.

329

271

*/

349

291

return false;

350

292

}

351

293

352

/* Workaround for systems without a real-time clock; see also

353

Debian bug #894495: <https://bugs.debian.org/894495> */

354

do {

355

{

356

time_t currtime = time(NULL);

357

if(currtime != (time_t)-1){

358

struct tm tm;

359

if(gmtime_r(&currtime, &tm) == NULL) {

360

perror_plus("gmtime_r");

361

break;

362

}

363

if(tm.tm_year != 70 or tm.tm_mon != 0){

364

break;

365

}

366

if(debug){

367

fprintf_plus(stderr, "System clock is January 1970");

368

}

369

} else {

370

if(debug){

371

fprintf_plus(stderr, "System clock is invalid");

372

}

373

}

374

}

375

struct stat keystat;

376

ret = fstat(fd, &keystat);

377

if(ret != 0){

378

perror_plus("fstat");

379

break;

380

}

381

ret = raise_privileges();

382

if(ret != 0){

383

errno = ret;

384

perror_plus("Failed to raise privileges");

385

break;

386

}

387

if(debug){

388

fprintf_plus(stderr,

389

"Setting system clock to key file mtime");

390

}

391

time_t keytime = keystat.st_mtim.tv_sec;

392

if(stime(&keytime) != 0){

393

perror_plus("stime");

394

}

395

ret = lower_privileges();

396

if(ret != 0){

397

errno = ret;

398

perror_plus("Failed to lower privileges");

399

}

400

} while(false);

401

402

294

rc = gpgme_data_new_from_fd(&pgp_data, fd);

403

295

if(rc != GPG_ERR_NO_ERROR){

404

296

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

412

304

gpgme_strsource(rc), gpgme_strerror(rc));

413

305

return false;

414

306

}

415

{

416

gpgme_import_result_t import_result

417

= gpgme_op_import_result(mc->ctx);

418

if((import_result->imported < 1

419

or import_result->not_imported > 0)

420

and import_result->unchanged == 0){

421

fprintf_plus(stderr, "bad gpgme_op_import_results:\n");

422

fprintf_plus(stderr,

423

"The total number of considered keys: %d\n",

424

import_result->considered);

425

fprintf_plus(stderr,

426

"The number of keys without user ID: %d\n",

427

import_result->no_user_id);

428

fprintf_plus(stderr,

429

"The total number of imported keys: %d\n",

430

import_result->imported);

431

fprintf_plus(stderr, "The number of imported RSA keys: %d\n",

432

import_result->imported_rsa);

433

fprintf_plus(stderr, "The number of unchanged keys: %d\n",

434

import_result->unchanged);

435

fprintf_plus(stderr, "The number of new user IDs: %d\n",

436

import_result->new_user_ids);

437

fprintf_plus(stderr, "The number of new sub keys: %d\n",

438

import_result->new_sub_keys);

439

fprintf_plus(stderr, "The number of new signatures: %d\n",

440

import_result->new_signatures);

441

fprintf_plus(stderr, "The number of new revocations: %d\n",

442

import_result->new_revocations);

443

fprintf_plus(stderr,

444

"The total number of secret keys read: %d\n",

445

import_result->secret_read);

446

fprintf_plus(stderr,

447

"The number of imported secret keys: %d\n",

448

import_result->secret_imported);

449

fprintf_plus(stderr,

450

"The number of unchanged secret keys: %d\n",

451

import_result->secret_unchanged);

452

fprintf_plus(stderr, "The number of keys not imported: %d\n",

453

import_result->not_imported);

454

for(gpgme_import_status_t import_status

455

= import_result->imports;

456

import_status != NULL;

457

import_status = import_status->next){

458

fprintf_plus(stderr, "Import status for key: %s\n",

459

import_status->fpr);

460

if(import_status->result != GPG_ERR_NO_ERROR){

461

fprintf_plus(stderr, "Import result: %s: %s\n",

462

gpgme_strsource(import_status->result),

463

gpgme_strerror(import_status->result));

464

}

465

fprintf_plus(stderr, "Key status:\n");

466

fprintf_plus(stderr,

467

import_status->status & GPGME_IMPORT_NEW

468

? "The key was new.\n"

469

: "The key was not new.\n");

470

fprintf_plus(stderr,

471

import_status->status & GPGME_IMPORT_UID

472

? "The key contained new user IDs.\n"

473

: "The key did not contain new user IDs.\n");

474

fprintf_plus(stderr,

475

import_status->status & GPGME_IMPORT_SIG

476

? "The key contained new signatures.\n"

477

: "The key did not contain new signatures.\n");

478

fprintf_plus(stderr,

479

import_status->status & GPGME_IMPORT_SUBKEY

480

? "The key contained new sub keys.\n"

481

: "The key did not contain new sub keys.\n");

482

fprintf_plus(stderr,

483

import_status->status & GPGME_IMPORT_SECRET

484

? "The key contained a secret key.\n"

485

: "The key did not contain a secret key.\n");

486

}

487

return false;

488

}

489

}

490

307

491

ret = close(fd);

308

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

492

309

if(ret == -1){

493

310

perror_plus("close");

494

311

}

533

350

/* Create new GPGME "context" */

534

351

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

535

352

if(rc != GPG_ERR_NO_ERROR){

536

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

537

gpgme_strsource(rc), gpgme_strerror(rc));

353

fprintf_plus(stderr, "Mandos plugin mandos-client: "

354

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

355

gpgme_strerror(rc));

538

356

return false;

539

357

}

540

358

576

394

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

577

395

rc = gpgme_data_new(&dh_plain);

578

396

if(rc != GPG_ERR_NO_ERROR){

579

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

397

fprintf_plus(stderr, "Mandos plugin mandos-client: "

398

"bad gpgme_data_new: %s: %s\n",

580

399

gpgme_strsource(rc), gpgme_strerror(rc));

581

400

gpgme_data_release(dh_crypto);

582

401

return -1;

595

414

if(result == NULL){

596

415

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

597

416

} else {

598

if(result->unsupported_algorithm != NULL) {

599

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

600

result->unsupported_algorithm);

601

}

602

fprintf_plus(stderr, "Wrong key usage: %s\n",

603

result->wrong_key_usage ? "Yes" : "No");

417

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

418

result->unsupported_algorithm);

419

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

420

result->wrong_key_usage);

604

421

if(result->file_name != NULL){

605

422

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

606

423

}

607

608

for(gpgme_recipient_t r = result->recipients; r != NULL;

609

r = r->next){

424

gpgme_recipient_t recipient;

425

recipient = result->recipients;

426

while(recipient != NULL){

610

427

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

611

gpgme_pubkey_algo_name(r->pubkey_algo));

612

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

428

gpgme_pubkey_algo_name

429

(recipient->pubkey_algo));

430

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

613

431

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

614

r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");

432

recipient->status == GPG_ERR_NO_SECKEY

433

? "No" : "Yes");

434

recipient = recipient->next;

615

435

}

616

436

}

617

437

}

693

513

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

694

514

}

695

515

696

__attribute__((nonnull(1, 2, 4), warn_unused_result))

516

__attribute__((nonnull, warn_unused_result))

697

517

static int init_gnutls_global(const char *pubkeyfilename,

698

518

const char *seckeyfilename,

699

const char *dhparamsfilename,

700

519

mandos_context *mc){

701

520

int ret;

702

521

unsigned int uret;

705

524

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

706

525

}

707

526

527

ret = gnutls_global_init();

528

if(ret != GNUTLS_E_SUCCESS){

529

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

530

safer_gnutls_strerror(ret));

531

return -1;

532

}

533

708

534

if(debug){

709

535

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

710

536

* - GnuTLS manual

718

544

if(ret != GNUTLS_E_SUCCESS){

719

545

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

720

546

safer_gnutls_strerror(ret));

547

gnutls_global_deinit();

721

548

return -1;

722

549

}

723

550

748

575

safer_gnutls_strerror(ret));

749

576

goto globalfail;

750

577

}

751

/* If a Diffie-Hellman parameters file was given, try to use it */

752

if(dhparamsfilename != NULL){

753

gnutls_datum_t params = { .data = NULL, .size = 0 };

754

do {

755

int dhpfile = open(dhparamsfilename, O_RDONLY);

756

if(dhpfile == -1){

757

perror_plus("open");

758

dhparamsfilename = NULL;

759

break;

760

}

761

size_t params_capacity = 0;

578

if(mc->dh_bits == 0){

579

/* Find out the optimal number of DH bits */

580

/* Try to read the private key file */

581

gnutls_datum_t buffer = { .data = NULL, .size = 0 };

582

{

583

int secfile = open(seckeyfilename, O_RDONLY);

584

size_t buffer_capacity = 0;

762

585

while(true){

763

params_capacity = incbuffer((char **)&params.data,

764

(size_t)params.size,

765

(size_t)params_capacity);

766

if(params_capacity == 0){

586

buffer_capacity = incbuffer((char **)&buffer.data,

587

(size_t)buffer.size,

588

(size_t)buffer_capacity);

589

if(buffer_capacity == 0){

767

590

perror_plus("incbuffer");

768

free(params.data);

769

params.data = NULL;

770

dhparamsfilename = NULL;

591

free(buffer.data);

592

buffer.data = NULL;

771

593

break;

772

594

}

773

ssize_t bytes_read = read(dhpfile,

774

params.data + params.size,

595

ssize_t bytes_read = read(secfile, buffer.data + buffer.size,

775

596

BUFFER_SIZE);

776

597

/* EOF */

777

598

if(bytes_read == 0){

780

601

/* check bytes_read for failure */

781

602

if(bytes_read < 0){

782

603

perror_plus("read");

783

free(params.data);

784

params.data = NULL;

785

dhparamsfilename = NULL;

786

break;

787

}

788

params.size += (unsigned int)bytes_read;

789

}

790

ret = close(dhpfile);

791

if(ret == -1){

792

perror_plus("close");

793

}

794

if(params.data == NULL){

795

dhparamsfilename = NULL;

796

}

797

if(dhparamsfilename == NULL){

798

break;

799

}

800

ret = gnutls_dh_params_import_pkcs3(mc->dh_params, &params,

801

GNUTLS_X509_FMT_PEM);

802

if(ret != GNUTLS_E_SUCCESS){

803

fprintf_plus(stderr, "Failed to parse DH parameters in file"

804

" \"%s\": %s\n", dhparamsfilename,

805

safer_gnutls_strerror(ret));

806

dhparamsfilename = NULL;

807

}

808

free(params.data);

809

} while(false);

810

}

811

if(dhparamsfilename == NULL){

812

if(mc->dh_bits == 0){

813

/* Find out the optimal number of DH bits */

814

/* Try to read the private key file */

815

gnutls_datum_t buffer = { .data = NULL, .size = 0 };

816

do {

817

int secfile = open(seckeyfilename, O_RDONLY);

818

if(secfile == -1){

819

perror_plus("open");

820

break;

821

}

822

size_t buffer_capacity = 0;

823

while(true){

824

buffer_capacity = incbuffer((char **)&buffer.data,

825

(size_t)buffer.size,

826

(size_t)buffer_capacity);

827

if(buffer_capacity == 0){

828

perror_plus("incbuffer");

829

free(buffer.data);

830

buffer.data = NULL;

831

break;

832

}

833

ssize_t bytes_read = read(secfile,

834

buffer.data + buffer.size,

835

BUFFER_SIZE);

836

/* EOF */

837

if(bytes_read == 0){

838

break;

839

}

840

/* check bytes_read for failure */

841

if(bytes_read < 0){

842

perror_plus("read");

843

free(buffer.data);

844

buffer.data = NULL;

845

break;

846

}

847

buffer.size += (unsigned int)bytes_read;

848

}

849

close(secfile);

850

} while(false);

851

/* If successful, use buffer to parse private key */

852

gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;

853

if(buffer.data != NULL){

854

{

855

gnutls_openpgp_privkey_t privkey = NULL;

856

ret = gnutls_openpgp_privkey_init(&privkey);

604

free(buffer.data);

605

buffer.data = NULL;

606

break;

607

}

608

buffer.size += (unsigned int)bytes_read;

609

}

610

close(secfile);

611

}

612

/* If successful, use buffer to parse private key */

613

gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;

614

if(buffer.data != NULL){

615

{

616

gnutls_openpgp_privkey_t privkey = NULL;

617

ret = gnutls_openpgp_privkey_init(&privkey);

618

if(ret != GNUTLS_E_SUCCESS){

619

fprintf_plus(stderr, "Error initializing OpenPGP key"

620

" structure: %s", safer_gnutls_strerror(ret));

621

free(buffer.data);

622

buffer.data = NULL;

623

} else {

624

ret = gnutls_openpgp_privkey_import(privkey, &buffer,

625

GNUTLS_OPENPGP_FMT_BASE64,

626

"", 0);

857

627

if(ret != GNUTLS_E_SUCCESS){

858

fprintf_plus(stderr, "Error initializing OpenPGP key"

859

" structure: %s",

628

fprintf_plus(stderr, "Error importing OpenPGP key : %s",

860

629

safer_gnutls_strerror(ret));

861

free(buffer.data);

862

buffer.data = NULL;

863

} else {

864

ret = gnutls_openpgp_privkey_import

865

(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);

866

if(ret != GNUTLS_E_SUCCESS){

867

fprintf_plus(stderr, "Error importing OpenPGP key : %s",

868

safer_gnutls_strerror(ret));

869

privkey = NULL;

870

}

871

free(buffer.data);

872

buffer.data = NULL;

873

if(privkey != NULL){

874

/* Use private key to suggest an appropriate

875

sec_param */

876

sec_param = gnutls_openpgp_privkey_sec_param(privkey);

877

gnutls_openpgp_privkey_deinit(privkey);

878

if(debug){

879

fprintf_plus(stderr, "This OpenPGP key implies using"

880

" a GnuTLS security parameter \"%s\".\n",

881

safe_string(gnutls_sec_param_get_name

882

(sec_param)));

883

}

884

}

630

privkey = NULL;

885

631

}

886

}

887

if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){

888

/* Err on the side of caution */

889

sec_param = GNUTLS_SEC_PARAM_ULTRA;

890

if(debug){

891

fprintf_plus(stderr, "Falling back to security parameter"

892

" \"%s\"\n",

893

safe_string(gnutls_sec_param_get_name

894

(sec_param)));

632

free(buffer.data);

633

buffer.data = NULL;

634

if(privkey != NULL){

635

/* Use private key to suggest an appropriate sec_param */

636

sec_param = gnutls_openpgp_privkey_sec_param(privkey);

637

gnutls_openpgp_privkey_deinit(privkey);

638

if(debug){

639

fprintf_plus(stderr, "This OpenPGP key implies using a"

640

" GnuTLS security parameter \"%s\".\n",

641

safe_string(gnutls_sec_param_get_name

642

(sec_param)));

643

}

895

644

}

896

645

}

897

646

}

898

uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);

899

if(uret != 0){

900

mc->dh_bits = uret;

647

if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){

648

/* Err on the side of caution */

649

sec_param = GNUTLS_SEC_PARAM_ULTRA;

901

650

if(debug){

902

fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"

903

" implies %u DH bits; using that.\n",

651

fprintf_plus(stderr, "Falling back to security parameter"

652

" \"%s\"\n",

904

653

safe_string(gnutls_sec_param_get_name

905

(sec_param)),

906

mc->dh_bits);

654

(sec_param)));

907

655

}

908

} else {

909

fprintf_plus(stderr, "Failed to get implied number of DH"

910

" bits for security parameter \"%s\"): %s\n",

656

}

657

}

658

uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);

659

if(uret != 0){

660

mc->dh_bits = uret;

661

if(debug){

662

fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"

663

" implies %u DH bits; using that.\n",

911

664

safe_string(gnutls_sec_param_get_name

912

665

(sec_param)),

913

safer_gnutls_strerror(ret));

914

goto globalfail;

666

mc->dh_bits);

915

667

}

916

} else if(debug){

917

fprintf_plus(stderr, "DH bits explicitly set to %u\n",

918

mc->dh_bits);

919

}

920

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

921

if(ret != GNUTLS_E_SUCCESS){

922

fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"

923

" bits): %s\n", mc->dh_bits,

668

} else {

669

fprintf_plus(stderr, "Failed to get implied number of DH"

670

" bits for security parameter \"%s\"): %s\n",

671

safe_string(gnutls_sec_param_get_name(sec_param)),

924

672

safer_gnutls_strerror(ret));

925

673

goto globalfail;

926

674

}

927

}

675

} else if(debug){

676

fprintf_plus(stderr, "DH bits explicitly set to %u\n",

677

mc->dh_bits);

678

}

679

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

680

if(ret != GNUTLS_E_SUCCESS){

681

fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"

682

" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));

683

goto globalfail;

684

}

685

928

686

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

929

687

930

688

return 0;

932

690

globalfail:

933

691

934

692

gnutls_certificate_free_credentials(mc->cred);

693

gnutls_global_deinit();

935

694

gnutls_dh_params_deinit(mc->dh_params);

936

695

return -1;

937

696

}

989

748

/* ignore client certificate if any. */

990

749

gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);

991

750

751

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

752

992

753

return 0;

993

754

}

994

755

996

757

static void empty_log(__attribute__((unused)) AvahiLogLevel level,

997

758

__attribute__((unused)) const char *txt){}

998

759

760

/* Set effective uid to 0, return errno */

761

__attribute__((warn_unused_result))

762

error_t raise_privileges(void){

763

error_t old_errno = errno;

764

error_t ret_errno = 0;

765

if(seteuid(0) == -1){

766

ret_errno = errno;

767

}

768

errno = old_errno;

769

return ret_errno;

770

}

771

772

/* Set effective and real user ID to 0. Return errno. */

773

__attribute__((warn_unused_result))

774

error_t raise_privileges_permanently(void){

775

error_t old_errno = errno;

776

error_t ret_errno = raise_privileges();

777

if(ret_errno != 0){

778

errno = old_errno;

779

return ret_errno;

780

}

781

if(setuid(0) == -1){

782

ret_errno = errno;

783

}

784

errno = old_errno;

785

return ret_errno;

786

}

787

788

/* Set effective user ID to unprivileged saved user ID */

789

__attribute__((warn_unused_result))

790

error_t lower_privileges(void){

791

error_t old_errno = errno;

792

error_t ret_errno = 0;

793

if(seteuid(uid) == -1){

794

ret_errno = errno;

795

}

796

errno = old_errno;

797

return ret_errno;

798

}

799

800

/* Lower privileges permanently */

801

__attribute__((warn_unused_result))

802

error_t lower_privileges_permanently(void){

803

error_t old_errno = errno;

804

error_t ret_errno = 0;

805

if(setuid(uid) == -1){

806

ret_errno = errno;

807

}

808

errno = old_errno;

809

return ret_errno;

810

}

811

999

812

/* Helper function to add_local_route() and delete_local_route() */

1000

813

__attribute__((nonnull, warn_unused_result))

1001

814

static bool add_delete_local_route(const bool add,

1055

868

perror_plus("dup2(devnull, STDIN_FILENO)");

1056

869

_exit(EX_OSERR);

1057

870

}

1058

ret = close(devnull);

871

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

1059

872

if(ret == -1){

1060

873

perror_plus("close");

1061

874

_exit(EX_OSERR);

1078

891

helper, O_RDONLY));

1079

892

if(helper_fd == -1){

1080

893

perror_plus("openat");

1081

close(helperdir_fd);

1082

894

_exit(EX_UNAVAILABLE);

1083

895

}

1084

close(helperdir_fd);

896

TEMP_FAILURE_RETRY(close(helperdir_fd));

1085

897

#ifdef __GNUC__

1086

898

#pragma GCC diagnostic push

1087

899

#pragma GCC diagnostic ignored "-Wcast-qual"

1206

1018

bool match = false;

1207

1019

{

1208

1020

char *interface = NULL;

1209

while((interface = argz_next(mc->interfaces,

1210

mc->interfaces_size,

1211

interface))){

1021

while((interface=argz_next(mc->interfaces, mc->interfaces_size,

1022

interface))){

1212

1023

if(if_nametoindex(interface) == (unsigned int)if_index){

1213

1024

match = true;

1214

1025

break;

1256

1067

goto mandos_end;

1257

1068

}

1258

1069

1070

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

1259

1071

if(af == AF_INET6){

1260

struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;

1261

*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };

1262

ret = inet_pton(af, ip, &to6->sin6_addr);

1072

((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;

1073

ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);

1263

1074

} else { /* IPv4 */

1264

struct sockaddr_in *to4 = (struct sockaddr_in *)&to;

1265

*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };

1266

ret = inet_pton(af, ip, &to4->sin_addr);

1075

((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;

1076

ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);

1267

1077

}

1268

1078

if(ret < 0 ){

1269

1079

int e = errno;

1348

1158

sizeof(struct sockaddr_in));

1349

1159

}

1350

1160

if(ret < 0){

1351

if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))

1161

if(errno == ENETUNREACH

1352

1162

and if_index != AVAHI_IF_UNSPEC

1353

1163

and connect_to == NULL

1354

1164

and not route_added and

1367

1177

with an explicit route added with the server's address.

1368

1178

1369

1179

Avahi bug reference:

1370

https://lists.freedesktop.org/archives/avahi/2010-February/001833.html

1180

http://lists.freedesktop.org/archives/avahi/2010-February/001833.html

1371

1181

https://bugs.debian.org/587961

1372

1182

*/

1373

1183

if(debug){

1553

1363

&decrypted_buffer, mc);

1554

1364

if(decrypted_buffer_size >= 0){

1555

1365

1556

clearerr(stdout);

1557

1366

written = 0;

1558

1367

while(written < (size_t) decrypted_buffer_size){

1559

1368

if(quit_now){

1575

1384

}

1576

1385

written += (size_t)ret;

1577

1386

}

1578

ret = fflush(stdout);

1579

if(ret != 0){

1580

int e = errno;

1581

if(debug){

1582

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

1583

strerror(errno));

1584

}

1585

errno = e;

1586

goto mandos_end;

1587

}

1588

1387

retval = 0;

1589

1388

}

1590

1389

}

1603

1402

free(decrypted_buffer);

1604

1403

free(buffer);

1605

1404

if(tcp_sd >= 0){

1606

ret = close(tcp_sd);

1405

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

1607

1406

}

1608

1407

if(ret == -1){

1609

1408

if(e == 0){

1621

1420

return retval;

1622

1421

}

1623

1422

1423

__attribute__((nonnull))

1624

1424

static void resolve_callback(AvahiSServiceResolver *r,

1625

1425

AvahiIfIndex interface,

1626

1426

AvahiProtocol proto,

1763

1563

__attribute__((nonnull, warn_unused_result))

1764

1564

bool get_flags(const char *ifname, struct ifreq *ifr){

1765

1565

int ret;

1766

int old_errno;

1566

error_t ret_errno;

1767

1567

1768

1568

int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1769

1569

if(s < 0){

1770

old_errno = errno;

1570

ret_errno = errno;

1771

1571

perror_plus("socket");

1772

errno = old_errno;

1572

errno = ret_errno;

1773

1573

return false;

1774

1574

}

1775

strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);

1776

ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */

1575

strcpy(ifr->ifr_name, ifname);

1777

1576

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1778

1577

if(ret == -1){

1779

1578

if(debug){

1780

old_errno = errno;

1579

ret_errno = errno;

1781

1580

perror_plus("ioctl SIOCGIFFLAGS");

1782

errno = old_errno;

1783

}

1784

if((close(s) == -1) and debug){

1785

old_errno = errno;

1786

perror_plus("close");

1787

errno = old_errno;

1581

errno = ret_errno;

1788

1582

}

1789

1583

return false;

1790

1584

}

1791

if((close(s) == -1) and debug){

1792

old_errno = errno;

1793

perror_plus("close");

1794

errno = old_errno;

1795

}

1796

1585

return true;

1797

1586

}

1798

1587

2059

1848

return;

2060

1849

}

2061

1850

}

2062

int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));

2063

if(devnull == -1){

2064

perror_plus("open(\"/dev/null\", O_RDONLY)");

2065

return;

2066

}

1851

#ifdef __GLIBC__

1852

#if __GLIBC_PREREQ(2, 15)

2067

1853

int numhooks = scandirat(hookdir_fd, ".", &direntries,

2068

1854

runnable_hook, alphasort);

1855

#else /* not __GLIBC_PREREQ(2, 15) */

1856

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1857

alphasort);

1858

#endif /* not __GLIBC_PREREQ(2, 15) */

1859

#else /* not __GLIBC__ */

1860

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1861

alphasort);

1862

#endif /* not __GLIBC__ */

2069

1863

if(numhooks == -1){

2070

1864

perror_plus("scandir");

2071

close(devnull);

2072

1865

return;

2073

1866

}

2074

1867

struct dirent *direntry;

2075

1868

int ret;

1869

int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));

1870

if(devnull == -1){

1871

perror_plus("open(\"/dev/null\", O_RDONLY)");

1872

return;

1873

}

2076

1874

for(int i = 0; i < numhooks; i++){

2077

1875

direntry = direntries[i];

2078

1876

if(debug){

2149

1947

perror_plus("openat");

2150

1948

_exit(EXIT_FAILURE);

2151

1949

}

2152

if(close(hookdir_fd) == -1){

1950

if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){

2153

1951

perror_plus("close");

2154

1952

_exit(EXIT_FAILURE);

2155

1953

}

2158

1956

perror_plus("dup2(devnull, STDIN_FILENO)");

2159

1957

_exit(EX_OSERR);

2160

1958

}

2161

ret = close(devnull);

1959

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

2162

1960

if(ret == -1){

2163

1961

perror_plus("close");

2164

1962

_exit(EX_OSERR);

2213

2011

free(direntry);

2214

2012

}

2215

2013

free(direntries);

2216

if(close(hookdir_fd) == -1){

2014

if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){

2217

2015

perror_plus("close");

2218

2016

} else {

2219

2017

hookdir_fd = -1;

2222

2020

}

2223

2021

2224

2022

__attribute__((nonnull, warn_unused_result))

2225

int bring_up_interface(const char *const interface,

2226

const float delay){

2227

int old_errno = errno;

2023

error_t bring_up_interface(const char *const interface,

2024

const float delay){

2025

error_t old_errno = errno;

2228

2026

int ret;

2229

2027

struct ifreq network;

2230

2028

unsigned int if_index = if_nametoindex(interface);

2240

2038

}

2241

2039

2242

2040

if(not interface_is_up(interface)){

2243

int ret_errno = 0;

2244

int ioctl_errno = 0;

2041

error_t ret_errno = 0, ioctl_errno = 0;

2245

2042

if(not get_flags(interface, &network)){

2246

2043

ret_errno = errno;

2247

2044

fprintf_plus(stderr, "Failed to get flags for interface "

2260

2057

}

2261

2058

2262

2059

if(quit_now){

2263

ret = close(sd);

2060

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

2264

2061

if(ret == -1){

2265

2062

perror_plus("close");

2266

2063

}

2316

2113

}

2317

2114

2318

2115

/* Close the socket */

2319

ret = close(sd);

2116

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

2320

2117

if(ret == -1){

2321

2118

perror_plus("close");

2322

2119

}

2334

2131

2335

2132

/* Sleep checking until interface is running.

2336

2133

Check every 0.25s, up to total time of delay */

2337

for(int i = 0; i < delay * 4; i++){

2134

for(int i=0; i < delay * 4; i++){

2338

2135

if(interface_is_running(interface)){

2339

2136

break;

2340

2137

}

2350

2147

}

2351

2148

2352

2149

__attribute__((nonnull, warn_unused_result))

2353

int take_down_interface(const char *const interface){

2354

int old_errno = errno;

2150

error_t take_down_interface(const char *const interface){

2151

error_t old_errno = errno;

2355

2152

struct ifreq network;

2356

2153

unsigned int if_index = if_nametoindex(interface);

2357

2154

if(if_index == 0){

2360

2157

return ENXIO;

2361

2158

}

2362

2159

if(interface_is_up(interface)){

2363

int ret_errno = 0;

2364

int ioctl_errno = 0;

2160

error_t ret_errno = 0, ioctl_errno = 0;

2365

2161

if(not get_flags(interface, &network) and debug){

2366

2162

ret_errno = errno;

2367

2163

fprintf_plus(stderr, "Failed to get flags for interface "

2405

2201

}

2406

2202

2407

2203

/* Close the socket */

2408

int ret = close(sd);

2204

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

2409

2205

if(ret == -1){

2410

2206

perror_plus("close");

2411

2207

}

2427

2223

2428

2224

int main(int argc, char *argv[]){

2429

2225

mandos_context mc = { .server = NULL, .dh_bits = 0,

2430

.priority = "SECURE256:!CTYPE-X.509"

2431

":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",

2432

.current_server = NULL, .interfaces = NULL,

2433

.interfaces_size = 0 };

2226

.priority = "SECURE256:!CTYPE-X.509:"

2227

"+CTYPE-OPENPGP:!RSA", .current_server = NULL,

2228

.interfaces = NULL, .interfaces_size = 0 };

2434

2229

AvahiSServiceBrowser *sb = NULL;

2435

2230

error_t ret_errno;

2436

2231

int ret;

2445

2240

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

2446

2241

const char *seckey = PATHDIR "/" SECKEY;

2447

2242

const char *pubkey = PATHDIR "/" PUBKEY;

2448

const char *dh_params_file = NULL;

2449

2243

char *interfaces_hooks = NULL;

2450

2244

2451

2245

bool gnutls_initialized = false;

2504

2298

.doc = "Bit length of the prime number used in the"

2505

2299

" Diffie-Hellman key exchange",

2506

2300

.group = 2 },

2507

{ .name = "dh-params", .key = 134,

2508

.arg = "FILE",

2509

.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"

2510

" for the Diffie-Hellman key exchange",

2511

.group = 2 },

2512

2301

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

2513

2302

.arg = "STRING",

2514

2303

.doc = "GnuTLS priority string for the TLS handshake",

2569

2358

}

2570

2359

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

2571

2360

break;

2572

case 134: /* --dh-params */

2573

dh_params_file = arg;

2574

break;

2575

2361

case 130: /* --priority */

2576

2362

mc.priority = arg;

2577

2363

break;

2617

2403

.args_doc = "",

2618

2404

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

2619

2405

" passwords from a Mandos server" };

2620

ret_errno = argp_parse(&argp, argc, argv,

2621

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

2622

switch(ret_errno){

2406

ret = argp_parse(&argp, argc, argv,

2407

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

2408

switch(ret){

2623

2409

case 0:

2624

2410

break;

2625

2411

case ENOMEM:

2626

2412

default:

2627

errno = ret_errno;

2413

errno = ret;

2628

2414

perror_plus("argp_parse");

2629

2415

exitcode = EX_OSERR;

2630

2416

goto end;

2636

2422

2637

2423

{

2638

2424

/* Work around Debian bug #633582:

2639

<https://bugs.debian.org/633582> */

2425

<http://bugs.debian.org/633582> */

2640

2426

2641

2427

/* Re-raise privileges */

2642

ret = raise_privileges();

2643

if(ret != 0){

2644

errno = ret;

2428

ret_errno = raise_privileges();

2429

if(ret_errno != 0){

2430

errno = ret_errno;

2645

2431

perror_plus("Failed to raise privileges");

2646

2432

} else {

2647

2433

struct stat st;

2663

2449

}

2664

2450

}

2665

2451

}

2666

close(seckey_fd);

2452

TEMP_FAILURE_RETRY(close(seckey_fd));

2667

2453

}

2668

2454

}

2669

2455

2684

2470

}

2685

2471

}

2686

2472

}

2687

close(pubkey_fd);

2688

}

2689

}

2690

2691

if(dh_params_file != NULL

2692

and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){

2693

int dhparams_fd = open(dh_params_file, O_RDONLY);

2694

if(dhparams_fd == -1){

2695

perror_plus("open");

2696

} else {

2697

ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));

2698

if(ret == -1){

2699

perror_plus("fstat");

2700

} else {

2701

if(S_ISREG(st.st_mode)

2702

and st.st_uid == 0 and st.st_gid == 0){

2703

ret = fchown(dhparams_fd, uid, gid);

2704

if(ret == -1){

2705

perror_plus("fchown");

2706

}

2707

}

2708

}

2709

close(dhparams_fd);

2473

TEMP_FAILURE_RETRY(close(pubkey_fd));

2710

2474

}

2711

2475

}

2712

2476

2713

2477

/* Lower privileges */

2714

ret = lower_privileges();

2715

if(ret != 0){

2716

errno = ret;

2478

ret_errno = lower_privileges();

2479

if(ret_errno != 0){

2480

errno = ret_errno;

2717

2481

perror_plus("Failed to lower privileges");

2718

2482

}

2719

2483

}

2889

2653

errno = bring_up_interface(interface, delay);

2890

2654

if(not interface_was_up){

2891

2655

if(errno != 0){

2892

fprintf_plus(stderr, "Failed to bring up interface \"%s\":"

2893

" %s\n", interface, strerror(errno));

2656

perror_plus("Failed to bring up interface");

2894

2657

} else {

2895

2658

errno = argz_add(&interfaces_to_take_down,

2896

2659

&interfaces_to_take_down_size,

2919

2682

goto end;

2920

2683

}

2921

2684

2922

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

2685

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

2923

2686

if(ret == -1){

2924

2687

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

2925

2688

exitcode = EX_UNAVAILABLE;

3047

2810

3048

2811

/* Allocate a new server */

3049

2812

mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),

3050

&config, NULL, NULL, &ret);

2813

&config, NULL, NULL, &ret_errno);

3051

2814

3052

2815

/* Free the Avahi configuration data */

3053

2816

avahi_server_config_free(&config);

3056

2819

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

3057

2820

if(mc.server == NULL){

3058

2821

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

3059

avahi_strerror(ret));

2822

avahi_strerror(ret_errno));

3060

2823

exitcode = EX_UNAVAILABLE;

3061

2824

goto end;

3062

2825

}

3097

2860

end:

3098

2861

3099

2862

if(debug){

3100

if(signal_received){

3101

fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",

3102

argv[0], signal_received,

3103

strsignal(signal_received));

3104

} else {

3105

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

3106

}

2863

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

3107

2864

}

3108

2865

3109

2866

/* Cleanup things */

3120

2877

3121

2878

if(gnutls_initialized){

3122

2879

gnutls_certificate_free_credentials(mc.cred);

2880

gnutls_global_deinit();

3123

2881

gnutls_dh_params_deinit(mc.dh_params);

3124

2882

}

3125

2883

3148

2906

3149

2907

/* Re-raise privileges */

3150

2908

{

3151

ret = raise_privileges();

3152

if(ret != 0){

3153

errno = ret;

2909

ret_errno = raise_privileges();

2910

if(ret_errno != 0){

2911

errno = ret_errno;

3154

2912

perror_plus("Failed to raise privileges");

3155

2913

} else {

3156

2914

3161

2919

/* Take down the network interfaces which were brought up */

3162

2920

{

3163

2921

char *interface = NULL;

3164

while((interface = argz_next(interfaces_to_take_down,

3165

interfaces_to_take_down_size,

3166

interface))){

3167

ret = take_down_interface(interface);

3168

if(ret != 0){

3169

errno = ret;

2922

while((interface=argz_next(interfaces_to_take_down,

2923

interfaces_to_take_down_size,

2924

interface))){

2925

ret_errno = take_down_interface(interface);

2926

if(ret_errno != 0){

2927

errno = ret_errno;

3170

2928

perror_plus("Failed to take down interface");

3171

2929

}

3172

2930

}

3177

2935

}

3178

2936

}

3179

2937

3180

ret = lower_privileges_permanently();

3181

if(ret != 0){

3182

errno = ret;

2938

ret_errno = lower_privileges_permanently();

2939

if(ret_errno != 0){

2940

errno = ret_errno;

3183

2941

perror_plus("Failed to lower privileges permanently");

3184

2942

}

3185

2943

}

3187

2945

free(interfaces_to_take_down);

3188

2946

free(interfaces_hooks);

3189

2947

3190

void clean_dir_at(int base, const char * const dirname,

3191

uintmax_t level){

3192

struct dirent **direntries = NULL;

3193

int dret;

3194

int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,

3195

O_RDONLY

3196

| O_NOFOLLOW

3197

| O_DIRECTORY

3198

| O_PATH));

3199

if(dir_fd == -1){

3200

perror_plus("open");

3201

return;

3202

}

3203

int numentries = scandirat(dir_fd, ".", &direntries,

3204

notdotentries, alphasort);

3205

if(numentries >= 0){

3206

for(int i = 0; i < numentries; i++){

3207

if(debug){

3208

fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",

3209

dirname, direntries[i]->d_name);

3210

}

3211

dret = unlinkat(dir_fd, direntries[i]->d_name, 0);

3212

if(dret == -1){

3213

if(errno == EISDIR){

3214

dret = unlinkat(dir_fd, direntries[i]->d_name,

3215

AT_REMOVEDIR);

3216

}

3217

if((dret == -1) and (errno == ENOTEMPTY)

3218

and (strcmp(direntries[i]->d_name, "private-keys-v1.d")

3219

== 0) and (level == 0)){

3220

/* Recurse only in this special case */

3221

clean_dir_at(dir_fd, direntries[i]->d_name, level+1);

3222

dret = 0;

3223

}

3224

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

3225

fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,

3226

direntries[i]->d_name, strerror(errno));

3227

}

3228

}

3229

free(direntries[i]);

3230

}

3231

3232

/* need to clean even if 0 because man page doesn't specify */

3233

free(direntries);

3234

dret = unlinkat(base, dirname, AT_REMOVEDIR);

3235

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

3236

perror_plus("rmdir");

3237

}

3238

} else {

3239

perror_plus("scandirat");

3240

}

3241

close(dir_fd);

3242

}

3243

3244

2948

/* Removes the GPGME temp directory and all files inside */

3245

2949

if(tempdir != NULL){

3246

clean_dir_at(-1, tempdir, 0);

2950

struct dirent **direntries = NULL;

2951

int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY

2952

| O_NOFOLLOW

2953

| O_DIRECTORY

2954

| O_PATH));

2955

if(tempdir_fd == -1){

2956

perror_plus("open");

2957

} else {

2958

#ifdef __GLIBC__

2959

#if __GLIBC_PREREQ(2, 15)

2960

int numentries = scandirat(tempdir_fd, ".", &direntries,

2961

notdotentries, alphasort);

2962

#else /* not __GLIBC_PREREQ(2, 15) */

2963

int numentries = scandir(tempdir, &direntries, notdotentries,

2964

alphasort);

2965

#endif /* not __GLIBC_PREREQ(2, 15) */

2966

#else /* not __GLIBC__ */

2967

int numentries = scandir(tempdir, &direntries, notdotentries,

2968

alphasort);

2969

#endif /* not __GLIBC__ */

2970

if(numentries >= 0){

2971

for(int i = 0; i < numentries; i++){

2972

ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);

2973

if(ret == -1){

2974

fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"

2975

" \"%s\", 0): %s\n", tempdir,

2976

direntries[i]->d_name, strerror(errno));

2977

}

2978

free(direntries[i]);

2979

}

2980

2981

/* need to clean even if 0 because man page doesn't specify */

2982

free(direntries);

2983

if(numentries == -1){

2984

perror_plus("scandir");

2985

}

2986

ret = rmdir(tempdir);

2987

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

2988

perror_plus("rmdir");

2989

}

2990

}

2991

TEMP_FAILURE_RETRY(close(tempdir_fd));

2992

}

3247

2993

}

3248

2994

3249

2995

if(quit_now){