/mandos/trunk : revision 382

44

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

45

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

46

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

47

srand(), strtof() */

47

srand(), strtof(), abort() */

48

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

49

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

50

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

71

INET_ADDRSTRLEN, INET6_ADDRSTRLEN

72

*/

73

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

74

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

75

setgid() */

74

getuid(), getgid(), seteuid(),

75

setgid(), pause() */

76

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

77

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

78

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

80

argp_parse(), ARGP_KEY_ARG,

81

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

82

#include <signal.h> /* sigemptyset(), sigaddset(),

83

sigaction(), SIGTERM, sigaction,

84

sig_atomic_t */

83

sigaction(), SIGTERM, sig_atomic_t,

84

raise() */

85

86

#ifdef __linux__

87

#include <sys/klog.h> /* klogctl() */

142

.dh_bits = 1024, .priority = "SECURE256"

143

":!CTYPE-X.509:+CTYPE-OPENPGP" };

144

145

sig_atomic_t quit_now = 0;

146

int signal_received = 0;

147

145

148

/*

146

149

* Make additional room in "buffer" for at least BUFFER_SIZE more

147

150

* bytes. "buffer_capacity" is how much is currently allocated,

164

167

*/

165

168

static bool init_gpgme(const char *seckey,

166

169

const char *pubkey, const char *tempdir){

167

int ret;

168

170

gpgme_error_t rc;

169

171

gpgme_engine_info_t engine_info;

170

172

173

175

* Helper function to insert pub and seckey to the engine keyring.

174

176

*/

175

177

bool import_key(const char *filename){

178

int ret;

176

179

int fd;

177

180

gpgme_data_t pgp_data;

178

181

249

252

return false;

250

253

}

251

254

252

return true;

255

return true;

253

256

}

254

257

255

258

/*

309

312

}

310

313

gpgme_recipient_t recipient;

311

314

recipient = result->recipients;

312

if(recipient){

313

while(recipient != NULL){

314

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

315

gpgme_pubkey_algo_name(recipient->pubkey_algo));

316

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

317

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

318

recipient->status == GPG_ERR_NO_SECKEY

319

? "No" : "Yes");

320

recipient = recipient->next;

321

}

315

while(recipient != NULL){

316

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

317

gpgme_pubkey_algo_name(recipient->pubkey_algo));

318

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

319

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

320

recipient->status == GPG_ERR_NO_SECKEY

321

? "No" : "Yes");

322

recipient = recipient->next;

322

323

}

323

324

}

324

325

}

476

477

static int init_gnutls_session(gnutls_session_t *session){

477

478

int ret;

478

479

/* GnuTLS session creation */

479

ret = gnutls_init(session, GNUTLS_SERVER);

480

do {

481

ret = gnutls_init(session, GNUTLS_SERVER);

482

if(quit_now){

483

return -1;

484

}

485

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

480

486

if(ret != GNUTLS_E_SUCCESS){

481

487

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

482

488

safer_gnutls_strerror(ret));

484

490

485

491

{

486

492

const char *err;

487

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

493

do {

494

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

495

if(quit_now){

496

gnutls_deinit(*session);

497

return -1;

498

}

499

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

488

500

if(ret != GNUTLS_E_SUCCESS){

489

501

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

490

502

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

494

506

}

495

507

}

496

508

497

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

498

mc.cred);

509

do {

510

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

511

mc.cred);

512

if(quit_now){

513

gnutls_deinit(*session);

514

return -1;

515

}

516

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

499

517

if(ret != GNUTLS_E_SUCCESS){

500

518

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

501

519

safer_gnutls_strerror(ret));

504

522

}

505

523

506

524

/* ignore client certificate if any. */

507

gnutls_certificate_server_set_request(*session,

508

GNUTLS_CERT_IGNORE);

525

gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);

509

526

510

527

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

511

528

520

537

static int start_mandos_communication(const char *ip, uint16_t port,

521

538

AvahiIfIndex if_index,

522

539

int af){

523

int ret, tcp_sd;

540

int ret, tcp_sd = -1;

524

541

ssize_t sret;

525

542

union {

526

543

struct sockaddr_in in;

527

544

struct sockaddr_in6 in6;

528

545

} to;

529

546

char *buffer = NULL;

530

char *decrypted_buffer;

547

char *decrypted_buffer = NULL;

531

548

size_t buffer_length = 0;

532

549

size_t buffer_capacity = 0;

533

ssize_t decrypted_buffer_size;

534

550

size_t written;

535

int retval = 0;

551

int retval = -1;

536

552

gnutls_session_t session;

537

553

int pf; /* Protocol family */

538

554

555

if(quit_now){

556

return -1;

557

}

558

539

559

switch(af){

540

560

case AF_INET6:

541

561

pf = PF_INET6;

561

581

tcp_sd = socket(pf, SOCK_STREAM, 0);

562

582

if(tcp_sd < 0){

563

583

perror("socket");

564

return -1;

584

goto mandos_end;

585

}

586

587

if(quit_now){

588

goto mandos_end;

565

589

}

566

590

567

591

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

574

598

}

575

599

if(ret < 0 ){

576

600

perror("inet_pton");

577

return -1;

601

goto mandos_end;

578

602

}

579

603

if(ret == 0){

580

604

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

581

return -1;

605

goto mandos_end;

582

606

}

583

607

if(af == AF_INET6){

584

608

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

591

615

if(if_index == AVAHI_IF_UNSPEC){

592

616

fprintf(stderr, "An IPv6 link-local address is incomplete"

593

617

" without a network interface\n");

594

return -1;

618

goto mandos_end;

595

619

}

596

620

/* Set the network interface number as scope */

597

621

to.in6.sin6_scope_id = (uint32_t)if_index;

602

626

-Wunreachable-code */

603

627

}

604

628

629

if(quit_now){

630

goto mandos_end;

631

}

632

605

633

if(debug){

606

634

if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){

607

635

char interface[IF_NAMESIZE];

634

662

}

635

663

}

636

664

665

if(quit_now){

666

goto mandos_end;

667

}

668

637

669

if(af == AF_INET6){

638

670

ret = connect(tcp_sd, &to.in6, sizeof(to));

639

671

} else {

641

673

}

642

674

if(ret < 0){

643

675

perror("connect");

644

return -1;

676

goto mandos_end;

677

}

678

679

if(quit_now){

680

goto mandos_end;

645

681

}

646

682

647

683

const char *out = mandos_protocol_version;

652

688

out_size - written));

653

689

if(ret == -1){

654

690

perror("write");

655

retval = -1;

656

691

goto mandos_end;

657

692

}

658

693

written += (size_t)ret;

666

701

break;

667

702

}

668

703

}

704

705

if(quit_now){

706

goto mandos_end;

707

}

669

708

}

670

709

671

710

if(debug){

672

711

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

673

712

}

674

713

714

if(quit_now){

715

goto mandos_end;

716

}

717

675

718

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

676

719

677

do{

720

if(quit_now){

721

goto mandos_end;

722

}

723

724

do {

678

725

ret = gnutls_handshake(session);

726

if(quit_now){

727

goto mandos_end;

728

}

679

729

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

680

730

681

731

if(ret != GNUTLS_E_SUCCESS){

683

733

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

684

734

gnutls_perror(ret);

685

735

}

686

retval = -1;

687

736

goto mandos_end;

688

737

}

689

738

695

744

}

696

745

697

746

while(true){

747

748

if(quit_now){

749

goto mandos_end;

750

}

751

698

752

buffer_capacity = incbuffer(&buffer, buffer_length,

699

753

buffer_capacity);

700

754

if(buffer_capacity == 0){

701

755

perror("incbuffer");

702

retval = -1;

756

goto mandos_end;

757

}

758

759

if(quit_now){

703

760

goto mandos_end;

704

761

}

705

762

714

771

case GNUTLS_E_AGAIN:

715

772

break;

716

773

case GNUTLS_E_REHANDSHAKE:

717

do{

774

do {

718

775

ret = gnutls_handshake(session);

776

777

if(quit_now){

778

goto mandos_end;

779

}

719

780

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

720

781

if(ret < 0){

721

782

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

722

783

gnutls_perror(ret);

723

retval = -1;

724

784

goto mandos_end;

725

785

}

726

786

break;

727

787

default:

728

788

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

729

789

" encrypted session with Mandos server\n");

730

retval = -1;

731

790

gnutls_bye(session, GNUTLS_SHUT_RDWR);

732

791

goto mandos_end;

733

792

}

740

799

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

741

800

}

742

801

743

gnutls_bye(session, GNUTLS_SHUT_RDWR);

802

if(quit_now){

803

goto mandos_end;

804

}

805

806

do {

807

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

808

if(quit_now){

809

goto mandos_end;

810

}

811

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

744

812

745

813

if(buffer_length > 0){

814

ssize_t decrypted_buffer_size;

746

815

decrypted_buffer_size = pgp_packet_decrypt(buffer,

747

816

buffer_length,

748

817

&decrypted_buffer);

749

818

if(decrypted_buffer_size >= 0){

819

750

820

written = 0;

751

821

while(written < (size_t) decrypted_buffer_size){

822

if(quit_now){

823

goto mandos_end;

824

}

825

752

826

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

753

827

(size_t)decrypted_buffer_size - written,

754

828

stdout);

757

831

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

758

832

strerror(errno));

759

833

}

760

retval = -1;

761

break;

834

goto mandos_end;

762

835

}

763

836

written += (size_t)ret;

764

837

}

765

free(decrypted_buffer);

766

} else {

767

retval = -1;

838

retval = 0;

768

839

}

769

} else {

770

retval = -1;

771

840

}

772

841

773

842

/* Shutdown procedure */

774

843

775

844

mandos_end:

845

free(decrypted_buffer);

776

846

free(buffer);

777

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

847

if(tcp_sd >= 0){

848

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

849

}

778

850

if(ret == -1){

779

851

perror("close");

780

852

}

781

853

gnutls_deinit(session);

854

if(quit_now){

855

retval = -1;

856

}

782

857

return retval;

783

858

}

784

859

801

876

/* Called whenever a service has been resolved successfully or

802

877

timed out */

803

878

879

if(quit_now){

880

return;

881

}

882

804

883

switch(event){

805

884

default:

806

885

case AVAHI_RESOLVER_FAILURE:

843

922

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

844

923

is removed from the LAN */

845

924

925

if(quit_now){

926

return;

927

}

928

846

929

switch(event){

847

930

default:

848

931

case AVAHI_BROWSER_FAILURE:

877

960

}

878

961

}

879

962

880

sig_atomic_t quit_now = 0;

881

882

963

/* stop main loop after sigterm has been called */

883

static void handle_sigterm(__attribute__((unused)) int sig){

964

static void handle_sigterm(int sig){

884

965

if(quit_now){

885

966

return;

886

967

}

887

968

quit_now = 1;

969

signal_received = sig;

888

970

int old_errno = errno;

889

971

if(mc.simple_poll != NULL){

890

972

avahi_simple_poll_quit(mc.simple_poll);

901

983

int exitcode = EXIT_SUCCESS;

902

984

const char *interface = "eth0";

903

985

struct ifreq network;

904

int sd;

986

int sd = -1;

987

bool take_down_interface = false;

905

988

uid_t uid;

906

989

gid_t gid;

907

990

char *connect_to = NULL;

915

998

bool gpgme_initialized = false;

916

999

float delay = 2.5f;

917

1000

918

struct sigaction old_sigterm_action;

1001

struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };

919

1002

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

920

1003

1004

uid = getuid();

1005

gid = getgid();

1006

1007

/* Lower any group privileges we might have, just to be safe */

1008

errno = 0;

1009

ret = setgid(gid);

1010

if(ret == -1){

1011

perror("setgid");

1012

}

1013

1014

/* Lower user privileges (temporarily) */

1015

errno = 0;

1016

ret = seteuid(uid);

1017

if(ret == -1){

1018

perror("seteuid");

1019

}

1020

1021

if(quit_now){

1022

goto end;

1023

}

1024

921

1025

{

922

1026

struct argp_option options[] = {

923

1027

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

1050

1154

exitcode = EXIT_FAILURE;

1051

1155

goto end;

1052

1156

}

1053

ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);

1054

if(ret == -1){

1055

perror("sigaction");

1056

exitcode = EXIT_FAILURE;

1057

goto end;

1058

}

1157

/* Need to check if the handler is SIG_IGN before handling:

1158

| [[info:libc:Initial Signal Actions]] |

1159

| [[info:libc:Basic Signal Handling]] |

1160

*/

1161

ret = sigaction(SIGINT, NULL, &old_sigterm_action);

1162

if(ret == -1){

1163

perror("sigaction");

1164

return EXIT_FAILURE;

1165

}

1166

if(old_sigterm_action.sa_handler != SIG_IGN){

1167

ret = sigaction(SIGINT, &sigterm_action, NULL);

1168

if(ret == -1){

1169

perror("sigaction");

1170

exitcode = EXIT_FAILURE;

1171

goto end;

1172

}

1173

}

1174

ret = sigaction(SIGHUP, NULL, &old_sigterm_action);

1175

if(ret == -1){

1176

perror("sigaction");

1177

return EXIT_FAILURE;

1178

}

1179

if(old_sigterm_action.sa_handler != SIG_IGN){

1180

ret = sigaction(SIGHUP, &sigterm_action, NULL);

1181

if(ret == -1){

1182

perror("sigaction");

1183

exitcode = EXIT_FAILURE;

1184

goto end;

1185

}

1186

}

1187

ret = sigaction(SIGTERM, NULL, &old_sigterm_action);

1188

if(ret == -1){

1189

perror("sigaction");

1190

return EXIT_FAILURE;

1191

}

1192

if(old_sigterm_action.sa_handler != SIG_IGN){

1193

ret = sigaction(SIGTERM, &sigterm_action, NULL);

1194

if(ret == -1){

1195

perror("sigaction");

1196

exitcode = EXIT_FAILURE;

1197

goto end;

1198

}

1199

}

1059

1200

1060

1201

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

1061

1202

if(interface[0] != '\0'){

1203

if_index = (AvahiIfIndex) if_nametoindex(interface);

1204

if(if_index == 0){

1205

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1206

exitcode = EXIT_FAILURE;

1207

goto end;

1208

}

1209

1210

if(quit_now){

1211

goto end;

1212

}

1213

1214

/* Re-raise priviliges */

1215

errno = 0;

1216

ret = seteuid(0);

1217

if(ret == -1){

1218

perror("seteuid");

1219

}

1220

1062

1221

#ifdef __linux__

1063

1222

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1064

1223

messages to mess up the prompt */

1082

1241

}

1083

1242

}

1084

1243

#endif /* __linux__ */

1244

/* Lower privileges */

1245

errno = 0;

1246

ret = seteuid(uid);

1247

if(ret == -1){

1248

perror("seteuid");

1249

}

1085

1250

goto end;

1086

1251

}

1087

1252

strcpy(network.ifr_name, interface);

1097

1262

}

1098

1263

#endif /* __linux__ */

1099

1264

exitcode = EXIT_FAILURE;

1265

/* Lower privileges */

1266

errno = 0;

1267

ret = seteuid(uid);

1268

if(ret == -1){

1269

perror("seteuid");

1270

}

1100

1271

goto end;

1101

1272

}

1102

1273

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

1103

1274

network.ifr_flags |= IFF_UP;

1275

take_down_interface = true;

1104

1276

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

1105

1277

if(ret == -1){

1278

take_down_interface = false;

1106

1279

perror("ioctl SIOCSIFFLAGS");

1107

1280

exitcode = EXIT_FAILURE;

1108

1281

#ifdef __linux__

1113

1286

}

1114

1287

}

1115

1288

#endif /* __linux__ */

1289

/* Lower privileges */

1290

errno = 0;

1291

ret = seteuid(uid);

1292

if(ret == -1){

1293

perror("seteuid");

1294

}

1116

1295

goto end;

1117

1296

}

1118

1297

}

1130

1309

perror("nanosleep");

1131

1310

}

1132

1311

}

1133

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

1134

if(ret == -1){

1135

perror("close");

1312

if(not take_down_interface){

1313

/* We won't need the socket anymore */

1314

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

1315

if(ret == -1){

1316

perror("close");

1317

}

1136

1318

}

1137

1319

#ifdef __linux__

1138

1320

if(restore_loglevel){

1143

1325

}

1144

1326

}

1145

1327

#endif /* __linux__ */

1146

}

1147

1148

uid = getuid();

1149

gid = getgid();

1150

1151

errno = 0;

1152

setgid(gid);

1153

if(ret == -1){

1154

perror("setgid");

1155

}

1156

1157

ret = setuid(uid);

1158

if(ret == -1){

1159

perror("setuid");

1328

/* Lower privileges */

1329

errno = 0;

1330

if(take_down_interface){

1331

/* Lower privileges */

1332

ret = seteuid(uid);

1333

if(ret == -1){

1334

perror("seteuid");

1335

}

1336

} else {

1337

/* Lower privileges permanently */

1338

ret = setuid(uid);

1339

if(ret == -1){

1340

perror("setuid");

1341

}

1342

}

1343

}

1344

1345

if(quit_now){

1346

goto end;

1160

1347

}

1161

1348

1162

1349

ret = init_gnutls_global(pubkey, seckey);

1168

1355

gnutls_initialized = true;

1169

1356

}

1170

1357

1358

if(quit_now){

1359

goto end;

1360

}

1361

1362

tempdir_created = true;

1171

1363

if(mkdtemp(tempdir) == NULL){

1364

tempdir_created = false;

1172

1365

perror("mkdtemp");

1173

1366

goto end;

1174

1367

}

1175

tempdir_created = true;

1368

1369

if(quit_now){

1370

goto end;

1371

}

1176

1372

1177

1373

if(not init_gpgme(pubkey, seckey, tempdir)){

1178

1374

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

1182

1378

gpgme_initialized = true;

1183

1379

}

1184

1380

1185

if(interface[0] != '\0'){

1186

if_index = (AvahiIfIndex) if_nametoindex(interface);

1187

if(if_index == 0){

1188

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1189

exitcode = EXIT_FAILURE;

1190

goto end;

1191

}

1381

if(quit_now){

1382

goto end;

1192

1383

}

1193

1384

1194

1385

if(connect_to != NULL){

1200

1391

exitcode = EXIT_FAILURE;

1201

1392

goto end;

1202

1393

}

1394

1395

if(quit_now){

1396

goto end;

1397

}

1398

1203

1399

uint16_t port;

1204

1400

errno = 0;

1205

1401

tmpmax = strtoimax(address+1, &tmp, 10);

1209

1405

exitcode = EXIT_FAILURE;

1210

1406

goto end;

1211

1407

}

1408

1409

if(quit_now){

1410

goto end;

1411

}

1412

1212

1413

port = (uint16_t)tmpmax;

1213

1414

*address = '\0';

1214

1415

address = connect_to;

1219

1420

} else {

1220

1421

af = AF_INET;

1221

1422

}

1423

1424

if(quit_now){

1425

goto end;

1426

}

1427

1222

1428

ret = start_mandos_communication(address, port, if_index, af);

1223

1429

if(ret < 0){

1224

1430

exitcode = EXIT_FAILURE;

1227

1433

}

1228

1434

goto end;

1229

1435

}

1230

1436

1437

if(quit_now){

1438

goto end;

1439

}

1440

1231

1441

{

1232

1442

AvahiServerConfig config;

1233

1443

/* Do not publish any local Zeroconf records */

1254

1464

goto end;

1255

1465

}

1256

1466

1467

if(quit_now){

1468

goto end;

1469

}

1470

1257

1471

/* Create the Avahi service browser */

1258

1472

sb = avahi_s_service_browser_new(mc.server, if_index,

1259

1473

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1265

1479

goto end;

1266

1480

}

1267

1481

1482

if(quit_now){

1483

goto end;

1484

}

1485

1268

1486

/* Run the main loop */

1269

1487

1270

1488

if(debug){

1299

1517

gpgme_release(mc.ctx);

1300

1518

}

1301

1519

1520

/* Take down the network interface */

1521

if(take_down_interface){

1522

/* Re-raise priviliges */

1523

errno = 0;

1524

ret = seteuid(0);

1525

if(ret == -1){

1526

perror("seteuid");

1527

}

1528

if(geteuid() == 0){

1529

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

1530

if(ret == -1){

1531

perror("ioctl SIOCGIFFLAGS");

1532

} else if(network.ifr_flags & IFF_UP) {

1533

network.ifr_flags &= ~IFF_UP; /* clear flag */

1534

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

1535

if(ret == -1){

1536

perror("ioctl SIOCSIFFLAGS");

1537

}

1538

}

1539

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

1540

if(ret == -1){

1541

perror("close");

1542

}

1543

/* Lower privileges permanently */

1544

errno = 0;

1545

ret = setuid(uid);

1546

if(ret == -1){

1547

perror("setuid");

1548

}

1549

}

1550

}

1551

1302

1552

/* Removes the temp directory used by GPGME */

1303

1553

if(tempdir_created){

1304

1554

DIR *d;

1343

1593

}

1344

1594

}

1345

1595

1596

if(quit_now){

1597

sigemptyset(&old_sigterm_action.sa_mask);

1598

old_sigterm_action.sa_handler = SIG_DFL;

1599

ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,

1600

&old_sigterm_action,

1601

NULL));

1602

if(ret == -1){

1603

perror("sigaction");

1604

}

1605

do {

1606

ret = raise(signal_received);

1607

} while(ret != 0 and errno == EINTR);

1608

if(ret != 0){

1609

perror("raise");

1610

abort();

1611

}

1612

TEMP_FAILURE_RETRY(pause());

1613

}

1614

1346

1615

return exitcode;

1347

1616

}