/mandos/release : revision 237.2.129

30

*/

31

32

/* Needed by GPGME, specifically gpgme_data_seek() */

33

#ifndef _LARGEFILE_SOURCE

33

34

#define _LARGEFILE_SOURCE

35

#endif

36

#ifndef _FILE_OFFSET_BITS

34

37

#define _FILE_OFFSET_BITS 64

38

#endif

35

39

36

40

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

37

41

38

42

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

39

stdout, ferror(), sscanf(),

40

remove() */

43

stdout, ferror(), remove() */

41

44

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

42

45

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

43

46

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

44

srand() */

47

srand(), strtof() */

45

48

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

46

49

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

47

50

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

56

59

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

57

60

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

58

61

*/

59

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

62

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

63

strtoimax() */

60

64

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

61

65

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

62

66

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

67

71

INET_ADDRSTRLEN, INET6_ADDRSTRLEN

68

72

*/

69

73

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

70

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

74

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

71

75

setgid() */

72

76

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

73

77

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

76

80

argp_parse(), ARGP_KEY_ARG,

77

81

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

78

82

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

79

sigaction(), SIGTERM, sigaction,

80

sig_atomic_t */

83

sigaction(), SIGTERM, sig_atomic_t,

84

raise() */

81

85

82

86

#ifdef __linux__

83

87

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

134

138

} mandos_context;

135

139

136

140

/* global context so signal handler can reach it*/

137

mandos_context mc;

141

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

142

.dh_bits = 1024, .priority = "SECURE256"

143

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

138

144

139

145

/*

140

146

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

158

164

*/

159

165

static bool init_gpgme(const char *seckey,

160

166

const char *pubkey, const char *tempdir){

161

int ret;

162

167

gpgme_error_t rc;

163

168

gpgme_engine_info_t engine_info;

164

169

167

172

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

168

173

*/

169

174

bool import_key(const char *filename){

175

int ret;

170

176

int fd;

171

177

gpgme_data_t pgp_data;

172

178

243

249

return false;

244

250

}

245

251

246

return true;

252

return true;

247

253

}

248

254

249

255

/*

303

309

}

304

310

gpgme_recipient_t recipient;

305

311

recipient = result->recipients;

306

if(recipient){

307

while(recipient != NULL){

308

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

309

gpgme_pubkey_algo_name(recipient->pubkey_algo));

310

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

311

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

312

recipient->status == GPG_ERR_NO_SECKEY

313

? "No" : "Yes");

314

recipient = recipient->next;

315

}

312

while(recipient != NULL){

313

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

314

gpgme_pubkey_algo_name(recipient->pubkey_algo));

315

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

316

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

317

recipient->status == GPG_ERR_NO_SECKEY

318

? "No" : "Yes");

319

recipient = recipient->next;

316

320

}

317

321

}

318

322

}

510

514

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

511

515

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

512

516

517

sig_atomic_t quit_now = 0;

518

int signal_received = 0;

519

513

520

/* Called when a Mandos server is found */

514

521

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

515

522

AvahiIfIndex if_index,

516

523

int af){

517

int ret, tcp_sd;

524

int ret, tcp_sd = -1;

518

525

ssize_t sret;

519

526

union {

520

527

struct sockaddr_in in;

524

531

char *decrypted_buffer;

525

532

size_t buffer_length = 0;

526

533

size_t buffer_capacity = 0;

527

ssize_t decrypted_buffer_size;

528

534

size_t written;

529

535

int retval = 0;

530

536

gnutls_session_t session;

531

537

int pf; /* Protocol family */

532

538

539

if(quit_now){

540

return -1;

541

}

542

533

543

switch(af){

534

544

case AF_INET6:

535

545

pf = PF_INET6;

555

565

tcp_sd = socket(pf, SOCK_STREAM, 0);

556

566

if(tcp_sd < 0){

557

567

perror("socket");

558

return -1;

568

retval = -1;

569

goto mandos_end;

570

}

571

572

if(quit_now){

573

goto mandos_end;

559

574

}

560

575

561

576

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

562

577

if(af == AF_INET6){

563

to.in6.sin6_family = (uint16_t)af;

578

to.in6.sin6_family = (sa_family_t)af;

564

579

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

565

580

} else { /* IPv4 */

566

581

to.in.sin_family = (sa_family_t)af;

568

583

}

569

584

if(ret < 0 ){

570

585

perror("inet_pton");

571

return -1;

586

retval = -1;

587

goto mandos_end;

572

588

}

573

589

if(ret == 0){

574

590

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

575

return -1;

591

retval = -1;

592

goto mandos_end;

576

593

}

577

594

if(af == AF_INET6){

578

595

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

585

602

if(if_index == AVAHI_IF_UNSPEC){

586

603

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

587

604

" without a network interface\n");

588

return -1;

605

retval = -1;

606

goto mandos_end;

589

607

}

590

608

/* Set the network interface number as scope */

591

609

to.in6.sin6_scope_id = (uint32_t)if_index;

596

614

-Wunreachable-code */

597

615

}

598

616

617

if(quit_now){

618

goto mandos_end;

619

}

620

599

621

if(debug){

600

622

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

601

623

char interface[IF_NAMESIZE];

628

650

}

629

651

}

630

652

653

if(quit_now){

654

goto mandos_end;

655

}

656

631

657

if(af == AF_INET6){

632

658

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

633

659

} else {

635

661

}

636

662

if(ret < 0){

637

663

perror("connect");

638

return -1;

664

retval = -1;

665

goto mandos_end;

666

}

667

668

if(quit_now){

669

goto mandos_end;

639

670

}

640

671

641

672

const char *out = mandos_protocol_version;

660

691

break;

661

692

}

662

693

}

694

695

if(quit_now){

696

goto mandos_end;

697

}

663

698

}

664

699

665

700

if(debug){

666

701

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

667

702

}

668

703

704

if(quit_now){

705

goto mandos_end;

706

}

707

669

708

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

670

709

671

do{

710

if(quit_now){

711

goto mandos_end;

712

}

713

714

do {

672

715

ret = gnutls_handshake(session);

716

if(quit_now){

717

goto mandos_end;

718

}

673

719

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

674

720

675

721

if(ret != GNUTLS_E_SUCCESS){

689

735

}

690

736

691

737

while(true){

738

739

if(quit_now){

740

goto mandos_end;

741

}

742

692

743

buffer_capacity = incbuffer(&buffer, buffer_length,

693

744

buffer_capacity);

694

745

if(buffer_capacity == 0){

697

748

goto mandos_end;

698

749

}

699

750

751

if(quit_now){

752

goto mandos_end;

753

}

754

700

755

sret = gnutls_record_recv(session, buffer+buffer_length,

701

756

BUFFER_SIZE);

702

757

if(sret == 0){

708

763

case GNUTLS_E_AGAIN:

709

764

break;

710

765

case GNUTLS_E_REHANDSHAKE:

711

do{

766

do {

712

767

ret = gnutls_handshake(session);

768

769

if(quit_now){

770

goto mandos_end;

771

}

713

772

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

714

773

if(ret < 0){

715

774

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

734

793

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

735

794

}

736

795

796

if(quit_now){

797

goto mandos_end;

798

}

799

737

800

gnutls_bye(session, GNUTLS_SHUT_RDWR);

738

801

802

if(quit_now){

803

goto mandos_end;

804

}

805

739

806

if(buffer_length > 0){

807

ssize_t decrypted_buffer_size;

740

808

decrypted_buffer_size = pgp_packet_decrypt(buffer,

741

809

buffer_length,

742

810

&decrypted_buffer);

743

811

if(decrypted_buffer_size >= 0){

812

744

813

written = 0;

745

814

while(written < (size_t) decrypted_buffer_size){

815

if(quit_now){

816

goto mandos_end;

817

}

818

746

819

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

747

820

(size_t)decrypted_buffer_size - written,

748

821

stdout);

768

841

769

842

mandos_end:

770

843

free(buffer);

771

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

844

if(tcp_sd >= 0){

845

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

846

}

772

847

if(ret == -1){

773

848

perror("close");

774

849

}

775

850

gnutls_deinit(session);

851

if(quit_now){

852

retval = -1;

853

}

776

854

return retval;

777

855

}

778

856

795

873

/* Called whenever a service has been resolved successfully or

796

874

timed out */

797

875

876

if(quit_now){

877

return;

878

}

879

798

880

switch(event){

799

881

default:

800

882

case AVAHI_RESOLVER_FAILURE:

837

919

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

838

920

is removed from the LAN */

839

921

922

if(quit_now){

923

return;

924

}

925

840

926

switch(event){

841

927

default:

842

928

case AVAHI_BROWSER_FAILURE:

852

938

the callback function is called the Avahi server will free the

853

939

resolver for us. */

854

940

855

if(!(avahi_s_service_resolver_new(mc.server, interface,

856

protocol, name, type, domain,

857

AVAHI_PROTO_INET6, 0,

858

resolve_callback, NULL)))

941

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

942

name, type, domain, protocol, 0,

943

resolve_callback, NULL) == NULL)

859

944

fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",

860

945

name, avahi_strerror(avahi_server_errno(mc.server)));

861

946

break;

872

957

}

873

958

}

874

959

875

sig_atomic_t quit_now = 0;

876

877

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

960

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

961

static void handle_sigterm(int sig){

878

962

if(quit_now){

879

963

return;

880

964

}

881

965

quit_now = 1;

966

signal_received = sig;

882

967

int old_errno = errno;

883

968

if(mc.simple_poll != NULL){

884

969

avahi_simple_poll_quit(mc.simple_poll);

891

976

int error;

892

977

int ret;

893

978

intmax_t tmpmax;

894

int numchars;

979

char *tmp;

895

980

int exitcode = EXIT_SUCCESS;

896

981

const char *interface = "eth0";

897

982

struct ifreq network;

898

int sd;

983

int sd = -1;

984

bool take_down_interface = false;

899

985

uid_t uid;

900

986

gid_t gid;

901

987

char *connect_to = NULL;

905

991

const char *seckey = PATHDIR "/" SECKEY;

906

992

const char *pubkey = PATHDIR "/" PUBKEY;

907

993

908

/* Initialize Mandos context */

909

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

910

.dh_bits = 1024, .priority = "SECURE256"

911

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

912

994

bool gnutls_initialized = false;

913

995

bool gpgme_initialized = false;

914

double delay = 2.5;

915

996

float delay = 2.5f;

997

916

998

struct sigaction old_sigterm_action;

917

999

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

918

1000

972

1054

pubkey = arg;

973

1055

break;

974

1056

case 129: /* --dh-bits */

975

ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);

976

if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax

977

or arg[numchars] != '\0'){

1057

errno = 0;

1058

tmpmax = strtoimax(arg, &tmp, 10);

1059

if(errno != 0 or tmp == arg or *tmp != '\0'

1060

or tmpmax != (typeof(mc.dh_bits))tmpmax){

978

1061

fprintf(stderr, "Bad number of DH bits\n");

979

1062

exit(EXIT_FAILURE);

980

1063

}

984

1067

mc.priority = arg;

985

1068

break;

986

1069

case 131: /* --delay */

987

ret = sscanf(arg, "%lf%n", &delay, &numchars);

988

if(ret < 1 or arg[numchars] != '\0'){

1070

errno = 0;

1071

delay = strtof(arg, &tmp);

1072

if(errno != 0 or tmp == arg or *tmp != '\0'){

989

1073

fprintf(stderr, "Bad delay\n");

990

1074

exit(EXIT_FAILURE);

991

1075

}

1012

1096

}

1013

1097

}

1014

1098

1099

if(not debug){

1100

avahi_set_log_function(empty_log);

1101

}

1102

1103

/* Initialize Avahi early so avahi_simple_poll_quit() can be called

1104

from the signal handler */

1105

/* Initialize the pseudo-RNG for Avahi */

1106

srand((unsigned int) time(NULL));

1107

mc.simple_poll = avahi_simple_poll_new();

1108

if(mc.simple_poll == NULL){

1109

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1110

exitcode = EXIT_FAILURE;

1111

goto end;

1112

}

1113

1114

sigemptyset(&sigterm_action.sa_mask);

1115

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1116

if(ret == -1){

1117

perror("sigaddset");

1118

exitcode = EXIT_FAILURE;

1119

goto end;

1120

}

1121

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1122

if(ret == -1){

1123

perror("sigaddset");

1124

exitcode = EXIT_FAILURE;

1125

goto end;

1126

}

1127

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1128

if(ret == -1){

1129

perror("sigaddset");

1130

exitcode = EXIT_FAILURE;

1131

goto end;

1132

}

1133

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

1134

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

1135

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

1136

*/

1137

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

1138

if(ret == -1){

1139

perror("sigaction");

1140

return EXIT_FAILURE;

1141

}

1142

if(old_sigterm_action.sa_handler != SIG_IGN){

1143

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

1144

if(ret == -1){

1145

perror("sigaction");

1146

exitcode = EXIT_FAILURE;

1147

goto end;

1148

}

1149

}

1150

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

1151

if(ret == -1){

1152

perror("sigaction");

1153

return EXIT_FAILURE;

1154

}

1155

if(old_sigterm_action.sa_handler != SIG_IGN){

1156

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

1157

if(ret == -1){

1158

perror("sigaction");

1159

exitcode = EXIT_FAILURE;

1160

goto end;

1161

}

1162

}

1163

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

1164

if(ret == -1){

1165

perror("sigaction");

1166

return EXIT_FAILURE;

1167

}

1168

if(old_sigterm_action.sa_handler != SIG_IGN){

1169

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

1170

if(ret == -1){

1171

perror("sigaction");

1172

exitcode = EXIT_FAILURE;

1173

goto end;

1174

}

1175

}

1176

1015

1177

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

1016

1178

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

1179

if_index = (AvahiIfIndex) if_nametoindex(interface);

1180

if(if_index == 0){

1181

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

1182

exitcode = EXIT_FAILURE;

1183

goto end;

1184

}

1185

1186

if(quit_now){

1187

goto end;

1188

}

1189

1017

1190

#ifdef __linux__

1018

1191

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1019

1192

messages to mess up the prompt */

1056

1229

}

1057

1230

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

1058

1231

network.ifr_flags |= IFF_UP;

1232

take_down_interface = true;

1059

1233

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

1060

1234

if(ret == -1){

1235

take_down_interface = false;

1061

1236

perror("ioctl SIOCSIFFLAGS");

1062

1237

exitcode = EXIT_FAILURE;

1063

1238

#ifdef __linux__

1085

1260

perror("nanosleep");

1086

1261

}

1087

1262

}

1088

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

1089

if(ret == -1){

1090

perror("close");

1263

if(not take_down_interface){

1264

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

1265

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

1266

if(ret == -1){

1267

perror("close");

1268

}

1091

1269

}

1092

1270

#ifdef __linux__

1093

1271

if(restore_loglevel){

1100

1278

#endif /* __linux__ */

1101

1279

}

1102

1280

1281

if(quit_now){

1282

goto end;

1283

}

1284

1103

1285

uid = getuid();

1104

1286

gid = getgid();

1105

1287

1288

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

1106

1289

errno = 0;

1107

setgid(gid);

1290

ret = setgid(gid);

1108

1291

if(ret == -1){

1109

1292

perror("setgid");

1110

1293

}

1111

1294

1112

ret = setuid(uid);

1113

if(ret == -1){

1114

perror("setuid");

1295

/* Drop user privileges */

1296

errno = 0;

1297

/* Will we need privileges later? */

1298

if(take_down_interface){

1299

/* Drop user privileges temporarily */

1300

ret = seteuid(uid);

1301

if(ret == -1){

1302

perror("seteuid");

1303

}

1304

} else {

1305

/* Drop user privileges permanently */

1306

ret = setuid(uid);

1307

if(ret == -1){

1308

perror("setuid");

1309

}

1310

}

1311

1312

if(quit_now){

1313

goto end;

1115

1314

}

1116

1315

1117

1316

ret = init_gnutls_global(pubkey, seckey);

1123

1322

gnutls_initialized = true;

1124

1323

}

1125

1324

1325

if(quit_now){

1326

goto end;

1327

}

1328

1329

tempdir_created = true;

1126

1330

if(mkdtemp(tempdir) == NULL){

1331

tempdir_created = false;

1127

1332

perror("mkdtemp");

1128

1333

goto end;

1129

1334

}

1130

tempdir_created = true;

1335

1336

if(quit_now){

1337

goto end;

1338

}

1131

1339

1132

1340

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

1133

1341

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

1137

1345

gpgme_initialized = true;

1138

1346

}

1139

1347

1140

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

1141

if_index = (AvahiIfIndex) if_nametoindex(interface);

1142

if(if_index == 0){

1143

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

1144

exitcode = EXIT_FAILURE;

1145

goto end;

1146

}

1348

if(quit_now){

1349

goto end;

1147

1350

}

1148

1351

1149

1352

if(connect_to != NULL){

1155

1358

exitcode = EXIT_FAILURE;

1156

1359

goto end;

1157

1360

}

1361

1362

if(quit_now){

1363

goto end;

1364

}

1365

1158

1366

uint16_t port;

1159

ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);

1160

if(ret < 1 or tmpmax != (uint16_t)tmpmax

1161

or address[numchars+1] != '\0'){

1367

errno = 0;

1368

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

1369

if(errno != 0 or tmp == address+1 or *tmp != '\0'

1370

or tmpmax != (uint16_t)tmpmax){

1162

1371

fprintf(stderr, "Bad port number\n");

1163

1372

exitcode = EXIT_FAILURE;

1164

1373

goto end;

1165

1374

}

1375

1376

if(quit_now){

1377

goto end;

1378

}

1379

1166

1380

port = (uint16_t)tmpmax;

1167

1381

*address = '\0';

1168

1382

address = connect_to;

1173

1387

} else {

1174

1388

af = AF_INET;

1175

1389

}

1390

1391

if(quit_now){

1392

goto end;

1393

}

1394

1176

1395

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

1177

1396

if(ret < 0){

1178

1397

exitcode = EXIT_FAILURE;

1182

1401

goto end;

1183

1402

}

1184

1403

1185

if(not debug){

1186

avahi_set_log_function(empty_log);

1187

}

1188

1189

/* Initialize the pseudo-RNG for Avahi */

1190

srand((unsigned int) time(NULL));

1191

1192

/* Allocate main Avahi loop object */

1193

mc.simple_poll = avahi_simple_poll_new();

1194

if(mc.simple_poll == NULL){

1195

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1196

exitcode = EXIT_FAILURE;

1404

if(quit_now){

1197

1405

goto end;

1198

1406

}

1199

1407

1223

1431

goto end;

1224

1432

}

1225

1433

1434

if(quit_now){

1435

goto end;

1436

}

1437

1226

1438

/* Create the Avahi service browser */

1227

1439

sb = avahi_s_service_browser_new(mc.server, if_index,

1228

AVAHI_PROTO_INET6, "_mandos._tcp",

1440

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1229

1441

NULL, 0, browse_callback, NULL);

1230

1442

if(sb == NULL){

1231

1443

fprintf(stderr, "Failed to create service browser: %s\n",

1234

1446

goto end;

1235

1447

}

1236

1448

1237

sigemptyset(&sigterm_action.sa_mask);

1238

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1239

if(ret == -1){

1240

perror("sigaddset");

1241

exitcode = EXIT_FAILURE;

1242

goto end;

1243

}

1244

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1245

if(ret == -1){

1246

perror("sigaddset");

1247

exitcode = EXIT_FAILURE;

1248

goto end;

1249

}

1250

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1251

if(ret == -1){

1252

perror("sigaddset");

1253

exitcode = EXIT_FAILURE;

1254

goto end;

1255

}

1256

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

1257

if(ret == -1){

1258

perror("sigaction");

1259

exitcode = EXIT_FAILURE;

1260

goto end;

1261

}

1449

if(quit_now){

1450

goto end;

1451

}

1262

1452

1263

1453

/* Run the main loop */

1264

1454

1294

1484

gpgme_release(mc.ctx);

1295

1485

}

1296

1486

1487

/* Take down the network interface */

1488

if(take_down_interface){

1489

/* Re-raise priviliges */

1490

errno = 0;

1491

ret = seteuid(0);

1492

if(ret == -1){

1493

perror("seteuid");

1494

}

1495

if(geteuid() == 0){

1496

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

1497

if(ret == -1){

1498

perror("ioctl SIOCGIFFLAGS");

1499

} else if(network.ifr_flags & IFF_UP) {

1500

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

1501

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

1502

if(ret == -1){

1503

perror("ioctl SIOCSIFFLAGS");

1504

}

1505

}

1506

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

1507

if(ret == -1){

1508

perror("close");

1509

}

1510

/* Lower privileges, permanently this time */

1511

errno = 0;

1512

ret = setuid(uid);

1513

if(ret == -1){

1514

perror("setuid");

1515

}

1516

}

1517

}

1518

1297

1519

/* Removes the temp directory used by GPGME */

1298

1520

if(tempdir_created){

1299

1521

DIR *d;

1338

1560

}

1339

1561

}

1340

1562

1563

if(quit_now){

1564

sigemptyset(&old_sigterm_action.sa_mask);

1565

old_sigterm_action.sa_handler = SIG_DFL;

1566

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

1567

if(ret == -1){

1568

perror("sigaction");

1569

}

1570

raise(signal_received);

1571

}

1572

1341

1573

return exitcode;

1342

1574

}