/mandos/release : revision 237.15.6

178

va_list ap;

179

va_start (ap, format);

180

181

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",

182

program_invocation_short_name));

181

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));

183

182

return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

184

183

}

185

184

263

262

rc = gpgme_data_new_from_fd(&pgp_data, fd);

264

263

if(rc != GPG_ERR_NO_ERROR){

265

264

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

265

gpgme_strsource(rc), gpgme_strerror(rc));

267

266

return false;

268

267

}

269

268

270

269

rc = gpgme_op_import(mc.ctx, pgp_data);

271

270

if(rc != GPG_ERR_NO_ERROR){

272

271

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

273

gpgme_strsource(rc), gpgme_strerror(rc));

272

gpgme_strsource(rc), gpgme_strerror(rc));

274

273

return false;

275

274

}

276

275

291

290

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

292

291

if(rc != GPG_ERR_NO_ERROR){

293

292

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

294

gpgme_strsource(rc), gpgme_strerror(rc));

293

gpgme_strsource(rc), gpgme_strerror(rc));

295

294

return false;

296

295

}

297

296

299

298

rc = gpgme_get_engine_info(&engine_info);

300

299

if(rc != GPG_ERR_NO_ERROR){

301

300

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

302

gpgme_strsource(rc), gpgme_strerror(rc));

301

gpgme_strsource(rc), gpgme_strerror(rc));

303

302

return false;

304

303

}

305

304

while(engine_info != NULL){

311

310

engine_info = engine_info->next;

312

311

}

313

312

if(engine_info == NULL){

314

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",

315

tempdir);

313

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n", tempdir);

316

314

return false;

317

315

}

318

316

320

318

rc = gpgme_new(&(mc.ctx));

321

319

if(rc != GPG_ERR_NO_ERROR){

322

320

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

323

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

324

gpgme_strerror(rc));

321

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

322

gpgme_strerror(rc));

325

323

return false;

326

324

}

327

325

354

352

0);

355

353

if(rc != GPG_ERR_NO_ERROR){

356

354

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

357

gpgme_strsource(rc), gpgme_strerror(rc));

355

gpgme_strsource(rc), gpgme_strerror(rc));

358

356

return -1;

359

357

}

360

358

362

360

rc = gpgme_data_new(&dh_plain);

363

361

if(rc != GPG_ERR_NO_ERROR){

364

362

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

365

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

366

gpgme_strsource(rc), gpgme_strerror(rc));

363

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

364

gpgme_strsource(rc), gpgme_strerror(rc));

367

365

gpgme_data_release(dh_crypto);

368

366

return -1;

369

367

}

373

371

rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);

374

372

if(rc != GPG_ERR_NO_ERROR){

375

373

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

376

gpgme_strsource(rc), gpgme_strerror(rc));

374

gpgme_strsource(rc), gpgme_strerror(rc));

377

375

plaintext_length = -1;

378

376

if(debug){

379

377

gpgme_decrypt_result_t result;

382

380

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

383

381

} else {

384

382

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

385

result->unsupported_algorithm);

383

result->unsupported_algorithm);

386

384

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

387

result->wrong_key_usage);

385

result->wrong_key_usage);

388

386

if(result->file_name != NULL){

389

387

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

390

388

}

392

390

recipient = result->recipients;

393

391

while(recipient != NULL){

394

392

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

395

gpgme_pubkey_algo_name

396

(recipient->pubkey_algo));

393

gpgme_pubkey_algo_name(recipient->pubkey_algo));

397

394

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

398

395

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

399

recipient->status == GPG_ERR_NO_SECKEY

400

? "No" : "Yes");

396

recipient->status == GPG_ERR_NO_SECKEY

397

? "No" : "Yes");

401

398

recipient = recipient->next;

402

399

}

403

400

}

484

481

485

482

ret = gnutls_global_init();

486

483

if(ret != GNUTLS_E_SUCCESS){

487

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

488

safer_gnutls_strerror(ret));

484

fprintf_plus(stderr, "GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));

489

485

return -1;

490

486

}

491

487

500

496

/* OpenPGP credentials */

501

497

ret = gnutls_certificate_allocate_credentials(&mc.cred);

502

498

if(ret != GNUTLS_E_SUCCESS){

503

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

504

safer_gnutls_strerror(ret));

499

fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));

505

500

gnutls_global_deinit();

506

501

return -1;

507

502

}

508

503

509

504

if(debug){

510

505

fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"

511

" secret key %s as GnuTLS credentials\n",

512

pubkeyfilename,

513

seckeyfilename);

506

" secret key %s as GnuTLS credentials\n", pubkeyfilename,

507

seckeyfilename);

514

508

}

515

509

516

510

ret = gnutls_certificate_set_openpgp_key_file

520

514

fprintf_plus(stderr,

521

515

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

522

516

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

523

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

524

safer_gnutls_strerror(ret));

517

fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));

525

518

goto globalfail;

526

519

}

527

520

528

521

/* GnuTLS server initialization */

529

522

ret = gnutls_dh_params_init(&mc.dh_params);

530

523

if(ret != GNUTLS_E_SUCCESS){

531

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

532

" initialization: %s\n",

533

safer_gnutls_strerror(ret));

524

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

525

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

534

526

goto globalfail;

535

527

}

536

528

ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);

537

529

if(ret != GNUTLS_E_SUCCESS){

538

530

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

539

safer_gnutls_strerror(ret));

531

safer_gnutls_strerror(ret));

540

532

goto globalfail;

541

533

}

542

534

562

554

}

563

555

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

564

556

if(ret != GNUTLS_E_SUCCESS){

565

fprintf_plus(stderr,

566

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

567

safer_gnutls_strerror(ret));

557

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

558

safer_gnutls_strerror(ret));

568

559

}

569

560

570

561

{

578

569

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

579

570

if(ret != GNUTLS_E_SUCCESS){

580

571

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

581

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

582

safer_gnutls_strerror(ret));

572

fprintf_plus(stderr, "GnuTLS error: %s\n", safer_gnutls_strerror(ret));

583

573

gnutls_deinit(*session);

584

574

return -1;

585

575

}

595

585

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

596

586

if(ret != GNUTLS_E_SUCCESS){

597

587

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

598

safer_gnutls_strerror(ret));

588

safer_gnutls_strerror(ret));

599

589

gnutls_deinit(*session);

600

590

return -1;

601

591

}

657

647

}

658

648

659

649

if(debug){

660

fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"

661

PRIu16 "\n", ip, port);

650

fprintf_plus(stderr, "Setting up a TCP connection to %s, port %" PRIu16

651

"\n", ip, port);

662

652

}

663

653

664

654

tcp_sd = socket(pf, SOCK_STREAM, 0);

703

693

(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and

704

694

-Wunreachable-code*/

705

695

if(if_index == AVAHI_IF_UNSPEC){

706

fprintf_plus(stderr, "An IPv6 link-local address is"

707

" incomplete without a network interface\n");

696

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

697

" without a network interface\n");

708

698

errno = EINVAL;

709

699

goto mandos_end;

710

700

}

728

718

if(if_indextoname((unsigned int)if_index, interface) == NULL){

729

719

perror_plus("if_indextoname");

730

720

} else {

731

fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16

732

"\n", ip, interface, port);

721

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

722

ip, interface, port);

733

723

}

734

724

} else {

735

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

736

ip, port);

725

fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);

737

726

}

738

727

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

739

728

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

845

834

/* Read OpenPGP packet that contains the wanted password */

846

835

847

836

if(debug){

848

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

849

" %s\n", ip);

837

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from %s\n", ip);

850

838

}

851

839

852

840

while(true){

890

878

}

891

879

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

892

880

if(ret < 0){

893

fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "

894

"***\n");

881

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

895

882

gnutls_perror(ret);

896

883

errno = EPROTO;

897

884

goto mandos_end;

899

886

break;

900

887

default:

901

888

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

902

" encrypted session with Mandos server\n");

889

" encrypted session with Mandos server\n");

903

890

gnutls_bye(session, GNUTLS_SHUT_RDWR);

904

891

errno = EIO;

905

892

goto mandos_end;

946

933

int e = errno;

947

934

if(debug){

948

935

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

949

strerror(errno));

936

strerror(errno));

950

937

}

951

938

errno = e;

952

939

goto mandos_end;

1009

996

switch(event){

1010

997

default:

1011

998

case AVAHI_RESOLVER_FAILURE:

1012

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "

1013

"'%s' of type '%s' in domain '%s': %s\n", name, type,

1014

domain,

1015

avahi_strerror(avahi_server_errno(mc.server)));

999

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service '%s'"

1000

" of type '%s' in domain '%s': %s\n", name, type, domain,

1001

avahi_strerror(avahi_server_errno(mc.server)));

1016

1002

break;

1017

1003

1018

1004

case AVAHI_RESOLVER_FOUND:

1021

1007

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

1022

1008

if(debug){

1023

1009

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

1024

PRIdMAX ") on port %" PRIu16 "\n", name,

1025

host_name, ip, (intmax_t)interface, port);

1010

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

1011

ip, (intmax_t)interface, port);

1026

1012

}

1027

1013

int ret = start_mandos_communication(ip, port, interface,

1028

1014

avahi_proto_to_af(proto));

1061

1047

case AVAHI_BROWSER_FAILURE:

1062

1048

1063

1049

fprintf_plus(stderr, "(Avahi browser) %s\n",

1064

avahi_strerror(avahi_server_errno(mc.server)));

1050

avahi_strerror(avahi_server_errno(mc.server)));

1065

1051

avahi_simple_poll_quit(mc.simple_poll);

1066

1052

return;

1067

1053

1074

1060

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

1075

1061

name, type, domain, protocol, 0,

1076

1062

resolve_callback, NULL) == NULL)

1077

fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"

1078

" %s\n", name,

1079

avahi_strerror(avahi_server_errno(mc.server)));

1063

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

1064

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

1080

1065

break;

1081

1066

1082

1067

case AVAHI_BROWSER_REMOVE:

1085

1070

case AVAHI_BROWSER_ALL_FOR_NOW:

1086

1071

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1087

1072

if(debug){

1088

fprintf_plus(stderr, "No Mandos server found, still"

1089

" searching...\n");

1073

fprintf_plus(stderr, "No Mandos server found, still searching...\n");

1090

1074

}

1091

1075

break;

1092

1076

}

1131

1115

/* Reject the loopback device */

1132

1116

if(ifr->ifr_flags & IFF_LOOPBACK){

1133

1117

if(debug){

1134

fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",

1135

ifname);

1118

fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);

1136

1119

}

1137

1120

return false;

1138

1121

}

1139

1122

/* Accept point-to-point devices only if connect_to is specified */

1140

1123

if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){

1141

1124

if(debug){

1142

fprintf_plus(stderr, "Accepting point-to-point interface"

1143

" \"%s\"\n", ifname);

1125

fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);

1144

1126

}

1145

1127

return true;

1146

1128

}

1147

1129

/* Otherwise, reject non-broadcast-capable devices */

1148

1130

if(not (ifr->ifr_flags & IFF_BROADCAST)){

1149

1131

if(debug){

1150

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1151

" \"%s\"\n", ifname);

1132

fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);

1152

1133

}

1153

1134

return false;

1154

1135

}

1155

1136

/* Reject non-ARP interfaces (including dummy interfaces) */

1156

1137

if(ifr->ifr_flags & IFF_NOARP){

1157

1138

if(debug){

1158

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",

1159

ifname);

1139

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);

1160

1140

}

1161

1141

return false;

1162

1142

}

1181

1161

struct ifreq ifr;

1182

1162

if(not get_flags(if_entry->d_name, &ifr)){

1183

1163

if(debug){

1184

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

1185

"\"%s\"\n", if_entry->d_name);

1164

fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",

1165

if_entry->d_name);

1186

1166

}

1187

1167

return 0;

1188

1168

}

1206

1186

struct ifreq ifr;

1207

1187

if(not get_flags(if_entry->d_name, &ifr)){

1208

1188

if(debug){

1209

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

1210

"\"%s\"\n", if_entry->d_name);

1189

fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",

1190

if_entry->d_name);

1211

1191

}

1212

1192

return 0;

1213

1193

}

1216

1196

if(not (ifr.ifr_flags & IFF_UP)){

1217

1197

if(debug){

1218

1198

fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",

1219

if_entry->d_name);

1199

if_entry->d_name);

1220

1200

}

1221

1201

return 0;

1222

1202

}

1225

1205

if(not (ifr.ifr_flags & IFF_RUNNING)){

1226

1206

if(debug){

1227

1207

fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",

1228

if_entry->d_name);

1208

if_entry->d_name);

1229

1209

}

1230

1210

return 0;

1231

1211

}

1266

1246

/* Contains non-allowed characters */

1267

1247

if(debug){

1268

1248

fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",

1269

direntry->d_name);

1249

direntry->d_name);

1270

1250

}

1271

1251

return 0;

1272

1252

}

1289

1269

/* Not a regular file */

1290

1270

if(debug){

1291

1271

fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",

1292

direntry->d_name);

1272

direntry->d_name);

1293

1273

}

1294

1274

return 0;

1295

1275

}

1297

1277

/* Not executable */

1298

1278

if(debug){

1299

1279

fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",

1300

direntry->d_name);

1280

direntry->d_name);

1301

1281

}

1302

1282

return 0;

1303

1283

}

1313

1293

while(true){

1314

1294

if(mc.current_server == NULL){

1315

1295

if (debug){

1316

fprintf_plus(stderr, "Wait until first server is found."

1317

" No timeout!\n");

1296

fprintf_plus(stderr, "Wait until first server is found. No timeout!\n");

1318

1297

}

1319

1298

ret = avahi_simple_poll_iterate(s, -1);

1320

1299

} else {

1321

1300

if (debug){

1322

fprintf_plus(stderr, "Check current_server if we should run"

1323

" it, or wait\n");

1301

fprintf_plus(stderr, "Check current_server if we should run it,"

1302

" or wait\n");

1324

1303

}

1325

1304

/* the current time */

1326

1305

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1342

1321

- ((intmax_t)waited_time.tv_nsec / 1000000));

1343

1322

1344

1323

if (debug){

1345

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",

1346

block_time);

1324

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);

1347

1325

}

1348

1326

1349

1327

if(block_time <= 0){

1376

1354

}

1377

1355

}

1378

1356

1379

bool run_network_hooks(const char *mode, const char *interface,

1380

const float delay){

1381

struct dirent **direntries;

1382

struct dirent *direntry;

1383

int ret;

1384

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

1385

alphasort);

1386

if(numhooks == -1){

1387

perror_plus("scandir");

1388

} else {

1389

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

1390

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

1391

direntry = direntries[i];

1392

char *fullname = NULL;

1393

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1394

if(ret < 0){

1395

perror_plus("asprintf");

1396

continue;

1397

}

1398

if(debug){

1399

fprintf_plus(stderr, "Running network hook \"%s\"\n",

1400

direntry->d_name);

1401

}

1402

pid_t hook_pid = fork();

1403

if(hook_pid == 0){

1404

/* Child */

1405

dup2(devnull, STDIN_FILENO);

1406

close(devnull);

1407

dup2(STDERR_FILENO, STDOUT_FILENO);

1408

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1409

if(ret == -1){

1410

perror_plus("setenv");

1411

return false;

1412

}

1413

ret = setenv("DEVICE", interface, 1);

1414

if(ret == -1){

1415

perror_plus("setenv");

1416

return false;

1417

}

1418

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1419

if(ret == -1){

1420

perror_plus("setenv");

1421

return false;

1422

}

1423

ret = setenv("MODE", mode, 1);

1424

if(ret == -1){

1425

perror_plus("setenv");

1426

return false;

1427

}

1428

char *delaystring;

1429

ret = asprintf(&delaystring, "%f", delay);

1430

if(ret == -1){

1431

perror_plus("asprintf");

1432

return false;

1433

}

1434

ret = setenv("DELAY", delaystring, 1);

1435

if(ret == -1){

1436

free(delaystring);

1437

perror_plus("setenv");

1438

return false;

1439

}

1440

free(delaystring);

1441

ret = execl(fullname, direntry->d_name, mode, NULL);

1442

perror_plus("execl");

1443

} else {

1444

int status;

1445

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1446

perror_plus("waitpid");

1447

free(fullname);

1448

continue;

1449

}

1450

if(WIFEXITED(status)){

1451

if(WEXITSTATUS(status) != 0){

1452

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1453

" with status %d\n", direntry->d_name,

1454

WEXITSTATUS(status));

1455

free(fullname);

1456

continue;

1457

}

1458

} else if(WIFSIGNALED(status)){

1459

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1460

" signal %d\n", direntry->d_name,

1461

WTERMSIG(status));

1462

free(fullname);

1463

continue;

1464

} else {

1465

fprintf_plus(stderr, "Warning: network hook \"%s\""

1466

" crashed\n", direntry->d_name);

1467

free(fullname);

1468

continue;

1469

}

1470

}

1471

free(fullname);

1472

if(quit_now){

1473

break;

1474

}

1475

}

1476

close(devnull);

1477

}

1478

return true;

1479

}

1480

1481

1357

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

1482

1358

AvahiSServiceBrowser *sb = NULL;

1483

1359

int error;

1641

1517

argp_state_help(state, state->out_stream,

1642

1518

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1643

1519

case 'V': /* --version */

1644

fprintf_plus(state->out_stream,

1645

"Mandos plugin mandos-client: ");

1520

fprintf_plus(state->out_stream, "Mandos plugin mandos-client: ");

1646

1521

fprintf_plus(state->out_stream, "%s\n", argp_program_version);

1647

1522

exit(argp_err_exit_status);

1648

1523

break;

1673

1548

}

1674

1549

}

1675

1550

1676

if(getuid() == 0){

1551

{

1677

1552

/* Work around Debian bug #633582:

1678

1553

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

1679

1554

struct stat st;

1694

1569

if(ret == -1){

1695

1570

perror_plus("fstat");

1696

1571

} else {

1697

if(S_ISREG(st.st_mode)

1698

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

1572

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1699

1573

ret = fchown(seckey_fd, uid, gid);

1700

1574

if(ret == -1){

1701

1575

perror_plus("fchown");

1715

1589

if(ret == -1){

1716

1590

perror_plus("fstat");

1717

1591

} else {

1718

if(S_ISREG(st.st_mode)

1719

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

1592

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1720

1593

ret = fchown(pubkey_fd, uid, gid);

1721

1594

if(ret == -1){

1722

1595

perror_plus("fchown");

1735

1608

}

1736

1609

}

1737

1610

1738

/* Run network hooks */

1611

/* Find network hooks and run them */

1739

1612

{

1740

if(getuid() == 0){

1741

/* Re-raise priviliges */

1742

errno = 0;

1743

ret = seteuid(0);

1744

if(ret == -1){

1745

perror_plus("seteuid");

1746

}

1747

}

1748

if(not run_network_hooks("start", interface, delay)){

1749

goto end;

1750

}

1751

if(getuid() == 0){

1752

/* Lower privileges */

1753

errno = 0;

1754

ret = seteuid(uid);

1755

if(ret == -1){

1756

perror_plus("seteuid");

1757

}

1613

struct dirent **direntries;

1614

struct dirent *direntry;

1615

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

1616

alphasort);

1617

if(numhooks == -1){

1618

perror_plus("scandir");

1619

} else {

1620

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

1621

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

1622

direntry = direntries[0];

1623

char *fullname = NULL;

1624

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1625

if(ret < 0){

1626

perror_plus("asprintf");

1627

continue;

1628

}

1629

pid_t hook_pid = fork();

1630

if(hook_pid == 0){

1631

/* Child */

1632

dup2(devnull, STDIN_FILENO);

1633

close(devnull);

1634

dup2(STDERR_FILENO, STDOUT_FILENO);

1635

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1636

if(ret == -1){

1637

perror_plus("setenv");

1638

exit(1);

1639

}

1640

ret = setenv("DEVICE", interface, 1);

1641

if(ret == -1){

1642

perror_plus("setenv");

1643

exit(1);

1644

}

1645

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1646

if(ret == -1){

1647

perror_plus("setenv");

1648

exit(1);

1649

}

1650

ret = setenv("MODE", "start", 1);

1651

if(ret == -1){

1652

perror_plus("setenv");

1653

exit(1);

1654

}

1655

char *delaystring;

1656

ret = asprintf(&delaystring, "%f", delay);

1657

if(ret == -1){

1658

perror_plus("asprintf");

1659

exit(1);

1660

}

1661

ret = setenv("DELAY", delaystring, 1);

1662

if(ret == -1){

1663

free(delaystring);

1664

perror_plus("setenv");

1665

exit(1);

1666

}

1667

free(delaystring);

1668

ret = execl(fullname, direntry->d_name, "start", NULL);

1669

perror_plus("execl");

1670

} else {

1671

int status;

1672

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1673

perror_plus("waitpid");

1674

free(fullname);

1675

continue;

1676

}

1677

if(WIFEXITED(status)){

1678

if(WEXITSTATUS(status) != 0){

1679

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1680

" with status %d\n", direntry->d_name,

1681

WEXITSTATUS(status));

1682

free(fullname);

1683

continue;

1684

}

1685

} else if(WIFSIGNALED(status)){

1686

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1687

" signal %d\n", direntry->d_name,

1688

WTERMSIG(status));

1689

free(fullname);

1690

continue;

1691

} else {

1692

fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",

1693

direntry->d_name);

1694

free(fullname);

1695

continue;

1696

}

1697

}

1698

free(fullname);

1699

if(quit_now){

1700

goto end;

1701

}

1702

}

1703

close(devnull);

1758

1704

}

1759

1705

}

1760

1706

1800

1746

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

1801

1747

mc.simple_poll = avahi_simple_poll_new();

1802

1748

if(mc.simple_poll == NULL){

1803

fprintf_plus(stderr,

1804

"Avahi: Failed to create simple poll object.\n");

1749

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

1805

1750

exitcode = EX_UNAVAILABLE;

1806

1751

goto end;

1807

1752

}

1999

1944

#endif /* __linux__ */

2000

1945

/* Lower privileges */

2001

1946

errno = 0;

2002

/* Lower privileges */

2003

ret = seteuid(uid);

2004

if(ret == -1){

2005

perror_plus("seteuid");

1947

if(take_down_interface){

1948

/* Lower privileges */

1949

ret = seteuid(uid);

1950

if(ret == -1){

1951

perror_plus("seteuid");

1952

}

1953

} else {

1954

/* Lower privileges permanently */

1955

ret = setuid(uid);

1956

if(ret == -1){

1957

perror_plus("setuid");

1958

}

2006

1959

}

2007

1960

}

2008

1961

2100

2053

break;

2101

2054

}

2102

2055

if(debug){

2103

fprintf_plus(stderr, "Retrying in %d seconds\n",

2104

(int)retry_interval);

2056

fprintf_plus(stderr, "Retrying in %d seconds\n", (int)retry_interval);

2105

2057

}

2106

2058

sleep((int)retry_interval);

2107

2059

}

2138

2090

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

2139

2091

if(mc.server == NULL){

2140

2092

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

2141

avahi_strerror(error));

2093

avahi_strerror(error));

2142

2094

exitcode = EX_UNAVAILABLE;

2143

2095

goto end;

2144

2096

}

2153

2105

NULL, 0, browse_callback, NULL);

2154

2106

if(sb == NULL){

2155

2107

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

2156

avahi_strerror(avahi_server_errno(mc.server)));

2108

avahi_strerror(avahi_server_errno(mc.server)));

2157

2109

exitcode = EX_UNAVAILABLE;

2158

2110

goto end;

2159

2111

}

2172

2124

(int)(retry_interval * 1000));

2173

2125

if(debug){

2174

2126

fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",

2175

(ret == 0) ? "successfully" : "with error");

2127

(ret == 0) ? "successfully" : "with error");

2176

2128

}

2177

2129

2178

2130

end:

2212

2164

}

2213

2165

}

2214

2166

2215

/* Re-raise priviliges */

2216

{

2217

if(getuid() == 0){

2218

errno = 0;

2219

ret = seteuid(0);

2220

if(ret == -1){

2221

perror_plus("seteuid");

2222

}

2223

}

2224

/* Run network hooks */

2225

if(not run_network_hooks("stop", interface, delay)){

2226

goto end;

2227

}

2228

2229

/* Take down the network interface */

2230

if(take_down_interface and geteuid() == 0){

2167

/* XXX run network hooks "stop" here */

2168

2169

/* Take down the network interface */

2170

if(take_down_interface){

2171

/* Re-raise priviliges */

2172

errno = 0;

2173

ret = seteuid(0);

2174

if(ret == -1){

2175

perror_plus("seteuid");

2176

}

2177

if(geteuid() == 0){

2231

2178

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

2232

2179

if(ret == -1){

2233

2180

perror_plus("ioctl SIOCGIFFLAGS");

2242

2189

if(ret == -1){

2243

2190

perror_plus("close");

2244

2191

}

2245

}

2246

}

2247

if(getuid() == 0){

2248

/* Lower privileges permanently */

2249

errno = 0;

2250

ret = setuid(uid);

2251

if(ret == -1){

2252

perror_plus("setuid");

2192

/* Lower privileges permanently */

2193

errno = 0;

2194

ret = setuid(uid);

2195

if(ret == -1){

2196

perror_plus("setuid");

2197

}

2253

2198

}

2254

2199

}

2255

2200

2271

2216

}

2272

2217

ret = remove(fullname);

2273

2218

if(ret == -1){

2274

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,

2275

strerror(errno));

2219

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname, strerror(errno));

2276

2220

}

2277

2221

free(fullname);

2278

2222

}