/mandos/trunk : revision 329

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(), abort() */

47

srand(), strtof() */

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(), seteuid(),

75

setgid(), pause() */

74

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

75

setgid() */

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, sig_atomic_t,

84

raise() */

83

sigaction(), SIGTERM, sigaction,

84

sig_atomic_t */

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

148

145

/*

149

146

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

150

147

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

167

164

*/

168

165

static bool init_gpgme(const char *seckey,

169

166

const char *pubkey, const char *tempdir){

167

int ret;

170

168

gpgme_error_t rc;

171

169

gpgme_engine_info_t engine_info;

172

170

175

173

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

176

174

*/

177

175

bool import_key(const char *filename){

178

int ret;

179

176

int fd;

180

177

gpgme_data_t pgp_data;

181

178

252

249

return false;

253

250

}

254

251

255

return true;

252

return true;

256

253

}

257

254

258

255

/*

312

309

}

313

310

gpgme_recipient_t recipient;

314

311

recipient = result->recipients;

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;

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

}

323

322

}

324

323

}

325

324

}

477

476

static int init_gnutls_session(gnutls_session_t *session){

478

477

int ret;

479

478

/* GnuTLS session creation */

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);

479

ret = gnutls_init(session, GNUTLS_SERVER);

486

480

if(ret != GNUTLS_E_SUCCESS){

487

481

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

488

482

safer_gnutls_strerror(ret));

490

484

491

485

{

492

486

const char *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);

487

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

500

488

if(ret != GNUTLS_E_SUCCESS){

501

489

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

502

490

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

506

494

}

507

495

}

508

496

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);

497

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

498

mc.cred);

517

499

if(ret != GNUTLS_E_SUCCESS){

518

500

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

519

501

safer_gnutls_strerror(ret));

522

504

}

523

505

524

506

/* ignore client certificate if any. */

525

gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);

507

gnutls_certificate_server_set_request(*session,

508

GNUTLS_CERT_IGNORE);

526

509

527

510

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

528

511

537

520

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

538

521

AvahiIfIndex if_index,

539

522

int af){

540

int ret, tcp_sd = -1;

523

int ret, tcp_sd;

541

524

ssize_t sret;

542

525

union {

543

526

struct sockaddr_in in;

544

527

struct sockaddr_in6 in6;

545

528

} to;

546

529

char *buffer = NULL;

547

char *decrypted_buffer = NULL;

530

char *decrypted_buffer;

548

531

size_t buffer_length = 0;

549

532

size_t buffer_capacity = 0;

533

ssize_t decrypted_buffer_size;

550

534

size_t written;

551

int retval = -1;

535

int retval = 0;

552

536

gnutls_session_t session;

553

537

int pf; /* Protocol family */

554

538

555

if(quit_now){

556

return -1;

557

}

558

559

539

switch(af){

560

540

case AF_INET6:

561

541

pf = PF_INET6;

581

561

tcp_sd = socket(pf, SOCK_STREAM, 0);

582

562

if(tcp_sd < 0){

583

563

perror("socket");

584

goto mandos_end;

585

}

586

587

if(quit_now){

588

goto mandos_end;

564

return -1;

589

565

}

590

566

591

567

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

598

574

}

599

575

if(ret < 0 ){

600

576

perror("inet_pton");

601

goto mandos_end;

577

return -1;

602

578

}

603

579

if(ret == 0){

604

580

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

605

goto mandos_end;

581

return -1;

606

582

}

607

583

if(af == AF_INET6){

608

584

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

615

591

if(if_index == AVAHI_IF_UNSPEC){

616

592

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

617

593

" without a network interface\n");

618

goto mandos_end;

594

return -1;

619

595

}

620

596

/* Set the network interface number as scope */

621

597

to.in6.sin6_scope_id = (uint32_t)if_index;

626

602

-Wunreachable-code */

627

603

}

628

604

629

if(quit_now){

630

goto mandos_end;

631

}

632

633

605

if(debug){

634

606

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

635

607

char interface[IF_NAMESIZE];

662

634

}

663

635

}

664

636

665

if(quit_now){

666

goto mandos_end;

667

}

668

669

637

if(af == AF_INET6){

670

638

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

671

639

} else {

673

641

}

674

642

if(ret < 0){

675

643

perror("connect");

676

goto mandos_end;

677

}

678

679

if(quit_now){

680

goto mandos_end;

644

return -1;

681

645

}

682

646

683

647

const char *out = mandos_protocol_version;

688

652

out_size - written));

689

653

if(ret == -1){

690

654

perror("write");

655

retval = -1;

691

656

goto mandos_end;

692

657

}

693

658

written += (size_t)ret;

701

666

break;

702

667

}

703

668

}

704

705

if(quit_now){

706

goto mandos_end;

707

}

708

669

}

709

670

710

671

if(debug){

711

672

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

712

673

}

713

674

714

if(quit_now){

715

goto mandos_end;

716

}

717

718

675

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

719

676

720

if(quit_now){

721

goto mandos_end;

722

}

723

724

do {

677

do{

725

678

ret = gnutls_handshake(session);

726

if(quit_now){

727

goto mandos_end;

728

}

729

679

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

730

680

731

681

if(ret != GNUTLS_E_SUCCESS){

733

683

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

734

684

gnutls_perror(ret);

735

685

}

686

retval = -1;

736

687

goto mandos_end;

737

688

}

738

689

744

695

}

745

696

746

697

while(true){

747

748

if(quit_now){

749

goto mandos_end;

750

}

751

752

698

buffer_capacity = incbuffer(&buffer, buffer_length,

753

699

buffer_capacity);

754

700

if(buffer_capacity == 0){

755

701

perror("incbuffer");

756

goto mandos_end;

757

}

758

759

if(quit_now){

702

retval = -1;

760

703

goto mandos_end;

761

704

}

762

705

771

714

case GNUTLS_E_AGAIN:

772

715

break;

773

716

case GNUTLS_E_REHANDSHAKE:

774

do {

717

do{

775

718

ret = gnutls_handshake(session);

776

777

if(quit_now){

778

goto mandos_end;

779

}

780

719

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

781

720

if(ret < 0){

782

721

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

783

722

gnutls_perror(ret);

723

retval = -1;

784

724

goto mandos_end;

785

725

}

786

726

break;

787

727

default:

788

728

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

789

729

" encrypted session with Mandos server\n");

730

retval = -1;

790

731

gnutls_bye(session, GNUTLS_SHUT_RDWR);

791

732

goto mandos_end;

792

733

}

799

740

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

800

741

}

801

742

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);

743

gnutls_bye(session, GNUTLS_SHUT_RDWR);

812

744

813

745

if(buffer_length > 0){

814

ssize_t decrypted_buffer_size;

815

746

decrypted_buffer_size = pgp_packet_decrypt(buffer,

816

747

buffer_length,

817

748

&decrypted_buffer);

818

749

if(decrypted_buffer_size >= 0){

819

820

750

written = 0;

821

751

while(written < (size_t) decrypted_buffer_size){

822

if(quit_now){

823

goto mandos_end;

824

}

825

826

752

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

827

753

(size_t)decrypted_buffer_size - written,

828

754

stdout);

831

757

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

832

758

strerror(errno));

833

759

}

834

goto mandos_end;

760

retval = -1;

761

break;

835

762

}

836

763

written += (size_t)ret;

837

764

}

838

retval = 0;

765

free(decrypted_buffer);

766

} else {

767

retval = -1;

839

768

}

769

} else {

770

retval = -1;

840

771

}

841

772

842

773

/* Shutdown procedure */

843

774

844

775

mandos_end:

845

free(decrypted_buffer);

846

776

free(buffer);

847

if(tcp_sd >= 0){

848

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

849

}

777

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

850

778

if(ret == -1){

851

779

perror("close");

852

780

}

853

781

gnutls_deinit(session);

854

if(quit_now){

855

retval = -1;

856

}

857

782

return retval;

858

783

}

859

784

876

801

/* Called whenever a service has been resolved successfully or

877

802

timed out */

878

803

879

if(quit_now){

880

return;

881

}

882

883

804

switch(event){

884

805

default:

885

806

case AVAHI_RESOLVER_FAILURE:

922

843

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

923

844

is removed from the LAN */

924

845

925

if(quit_now){

926

return;

927

}

928

929

846

switch(event){

930

847

default:

931

848

case AVAHI_BROWSER_FAILURE:

960

877

}

961

878

}

962

879

880

sig_atomic_t quit_now = 0;

881

963

882

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

964

static void handle_sigterm(int sig){

883

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

965

884

if(quit_now){

966

885

return;

967

886

}

968

887

quit_now = 1;

969

signal_received = sig;

970

888

int old_errno = errno;

971

889

if(mc.simple_poll != NULL){

972

890

avahi_simple_poll_quit(mc.simple_poll);

983

901

int exitcode = EXIT_SUCCESS;

984

902

const char *interface = "eth0";

985

903

struct ifreq network;

986

int sd = -1;

987

bool take_down_interface = false;

904

int sd;

988

905

uid_t uid;

989

906

gid_t gid;

990

907

char *connect_to = NULL;

998

915

bool gpgme_initialized = false;

999

916

float delay = 2.5f;

1000

917

1001

struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };

918

struct sigaction old_sigterm_action;

1002

919

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

1003

920

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

1025

921

{

1026

922

struct argp_option options[] = {

1027

923

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

1154

1050

exitcode = EXIT_FAILURE;

1155

1051

goto end;

1156

1052

}

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

}

1053

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

1054

if(ret == -1){

1055

perror("sigaction");

1056

exitcode = EXIT_FAILURE;

1057

goto end;

1058

}

1200

1059

1201

1060

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

1202

1061

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

1221

1062

#ifdef __linux__

1222

1063

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1223

1064

messages to mess up the prompt */

1241

1082

}

1242

1083

}

1243

1084

#endif /* __linux__ */

1244

/* Lower privileges */

1245

errno = 0;

1246

ret = seteuid(uid);

1247

if(ret == -1){

1248

perror("seteuid");

1249

}

1250

1085

goto end;

1251

1086

}

1252

1087

strcpy(network.ifr_name, interface);

1262

1097

}

1263

1098

#endif /* __linux__ */

1264

1099

exitcode = EXIT_FAILURE;

1265

/* Lower privileges */

1266

errno = 0;

1267

ret = seteuid(uid);

1268

if(ret == -1){

1269

perror("seteuid");

1270

}

1271

1100

goto end;

1272

1101

}

1273

1102

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

1274

1103

network.ifr_flags |= IFF_UP;

1275

take_down_interface = true;

1276

1104

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

1277

1105

if(ret == -1){

1278

take_down_interface = false;

1279

1106

perror("ioctl SIOCSIFFLAGS");

1280

1107

exitcode = EXIT_FAILURE;

1281

1108

#ifdef __linux__

1286

1113

}

1287

1114

}

1288

1115

#endif /* __linux__ */

1289

/* Lower privileges */

1290

errno = 0;

1291

ret = seteuid(uid);

1292

if(ret == -1){

1293

perror("seteuid");

1294

}

1295

1116

goto end;

1296

1117

}

1297

1118

}

1309

1130

perror("nanosleep");

1310

1131

}

1311

1132

}

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

}

1133

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

1134

if(ret == -1){

1135

perror("close");

1318

1136

}

1319

1137

#ifdef __linux__

1320

1138

if(restore_loglevel){

1325

1143

}

1326

1144

}

1327

1145

#endif /* __linux__ */

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;

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");

1347

1160

}

1348

1161

1349

1162

ret = init_gnutls_global(pubkey, seckey);

1355

1168

gnutls_initialized = true;

1356

1169

}

1357

1170

1358

if(quit_now){

1359

goto end;

1360

}

1361

1362

tempdir_created = true;

1363

1171

if(mkdtemp(tempdir) == NULL){

1364

tempdir_created = false;

1365

1172

perror("mkdtemp");

1366

1173

goto end;

1367

1174

}

1368

1369

if(quit_now){

1370

goto end;

1371

}

1175

tempdir_created = true;

1372

1176

1373

1177

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

1374

1178

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

1378

1182

gpgme_initialized = true;

1379

1183

}

1380

1184

1381

if(quit_now){

1382

goto end;

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

}

1383

1192

}

1384

1193

1385

1194

if(connect_to != NULL){

1391

1200

exitcode = EXIT_FAILURE;

1392

1201

goto end;

1393

1202

}

1394

1395

if(quit_now){

1396

goto end;

1397

}

1398

1399

1203

uint16_t port;

1400

1204

errno = 0;

1401

1205

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

1405

1209

exitcode = EXIT_FAILURE;

1406

1210

goto end;

1407

1211

}

1408

1409

if(quit_now){

1410

goto end;

1411

}

1412

1413

1212

port = (uint16_t)tmpmax;

1414

1213

*address = '\0';

1415

1214

address = connect_to;

1420

1219

} else {

1421

1220

af = AF_INET;

1422

1221

}

1423

1424

if(quit_now){

1425

goto end;

1426

}

1427

1428

1222

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

1429

1223

if(ret < 0){

1430

1224

exitcode = EXIT_FAILURE;

1433

1227

}

1434

1228

goto end;

1435

1229

}

1436

1437

if(quit_now){

1438

goto end;

1439

}

1440

1230

1441

1231

{

1442

1232

AvahiServerConfig config;

1443

1233

/* Do not publish any local Zeroconf records */

1464

1254

goto end;

1465

1255

}

1466

1256

1467

if(quit_now){

1468

goto end;

1469

}

1470

1471

1257

/* Create the Avahi service browser */

1472

1258

sb = avahi_s_service_browser_new(mc.server, if_index,

1473

1259

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1479

1265

goto end;

1480

1266

}

1481

1267

1482

if(quit_now){

1483

goto end;

1484

}

1485

1486

1268

/* Run the main loop */

1487

1269

1488

1270

if(debug){

1517

1299

gpgme_release(mc.ctx);

1518

1300

}

1519

1301

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

1552

1302

/* Removes the temp directory used by GPGME */

1553

1303

if(tempdir_created){

1554

1304

DIR *d;

1593

1343

}

1594

1344

}

1595

1345

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

1615

1346

return exitcode;

1616

1347

}