/mandos/trunk : revision 505.2.6

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

}

1304

if(debug){

1305

fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",

1306

direntry->d_name);

1307

}

1308

1284

return 1;

1309

1285

}

1310

1286

1317

1293

while(true){

1318

1294

if(mc.current_server == NULL){

1319

1295

if (debug){

1320

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

1321

" No timeout!\n");

1296

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

1322

1297

}

1323

1298

ret = avahi_simple_poll_iterate(s, -1);

1324

1299

} else {

1325

1300

if (debug){

1326

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

1327

" it, or wait\n");

1301

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

1302

" or wait\n");

1328

1303

}

1329

1304

/* the current time */

1330

1305

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1346

1321

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

1347

1322

1348

1323

if (debug){

1349

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

1350

block_time);

1324

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

1351

1325

}

1352

1326

1353

1327

if(block_time <= 0){

1380

1354

}

1381

1355

}

1382

1356

1383

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

1384

const float delay){

1385

struct dirent **direntries;

1386

struct dirent *direntry;

1387

int ret;

1388

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

1389

alphasort);

1390

if(numhooks == -1){

1391

perror_plus("scandir");

1392

} else {

1393

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

1394

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

1395

direntry = direntries[i];

1396

char *fullname = NULL;

1397

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

1398

if(ret < 0){

1399

perror_plus("asprintf");

1400

continue;

1401

}

1402

if(debug){

1403

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

1404

direntry->d_name);

1405

}

1406

pid_t hook_pid = fork();

1407

if(hook_pid == 0){

1408

/* Child */

1409

dup2(devnull, STDIN_FILENO);

1410

close(devnull);

1411

dup2(STDERR_FILENO, STDOUT_FILENO);

1412

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

1413

if(ret == -1){

1414

perror_plus("setenv");

1415

return false;

1416

}

1417

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

1418

if(ret == -1){

1419

perror_plus("setenv");

1420

return false;

1421

}

1422

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

1423

if(ret == -1){

1424

perror_plus("setenv");

1425

return false;

1426

}

1427

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

1428

if(ret == -1){

1429

perror_plus("setenv");

1430

return false;

1431

}

1432

char *delaystring;

1433

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

1434

if(ret == -1){

1435

perror_plus("asprintf");

1436

return false;

1437

}

1438

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

1439

if(ret == -1){

1440

free(delaystring);

1441

perror_plus("setenv");

1442

return false;

1443

}

1444

free(delaystring);

1445

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

1446

perror_plus("execl");

1447

} else {

1448

int status;

1449

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

1450

perror_plus("waitpid");

1451

free(fullname);

1452

continue;

1453

}

1454

if(WIFEXITED(status)){

1455

if(WEXITSTATUS(status) != 0){

1456

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

1457

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

1458

WEXITSTATUS(status));

1459

free(fullname);

1460

continue;

1461

}

1462

} else if(WIFSIGNALED(status)){

1463

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

1464

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

1465

WTERMSIG(status));

1466

free(fullname);

1467

continue;

1468

} else {

1469

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

1470

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

1471

free(fullname);

1472

continue;

1473

}

1474

}

1475

free(fullname);

1476

if(debug){

1477

fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",

1478

direntry->d_name);

1479

}

1480

}

1481

close(devnull);

1482

}

1483

return true;

1484

}

1485

1486

1357

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

1487

1358

AvahiSServiceBrowser *sb = NULL;

1488

1359

int error;

1646

1517

argp_state_help(state, state->out_stream,

1647

1518

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1648

1519

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

1649

fprintf_plus(state->out_stream,

1650

"Mandos plugin mandos-client: ");

1520

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

1651

1521

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

1652

1522

exit(argp_err_exit_status);

1653

1523

break;

1678

1548

}

1679

1549

}

1680

1550

1681

if(getuid() == 0){

1551

{

1682

1552

/* Work around Debian bug #633582:

1683

1553

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

1684

1554

struct stat st;

1699

1569

if(ret == -1){

1700

1570

perror_plus("fstat");

1701

1571

} else {

1702

if(S_ISREG(st.st_mode)

1703

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){

1704

1573

ret = fchown(seckey_fd, uid, gid);

1705

1574

if(ret == -1){

1706

1575

perror_plus("fchown");

1720

1589

if(ret == -1){

1721

1590

perror_plus("fstat");

1722

1591

} else {

1723

if(S_ISREG(st.st_mode)

1724

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){

1725

1593

ret = fchown(pubkey_fd, uid, gid);

1726

1594

if(ret == -1){

1727

1595

perror_plus("fchown");

1740

1608

}

1741

1609

}

1742

1610

1743

/* Run network hooks */

1611

/* Find network hooks and run them */

1744

1612

{

1745

if(getuid() == 0){

1746

/* Re-raise priviliges */

1747

errno = 0;

1748

ret = seteuid(0);

1749

if(ret == -1){

1750

perror_plus("seteuid");

1751

}

1752

}

1753

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

1754

goto end;

1755

}

1756

if(getuid() == 0){

1757

/* Lower privileges */

1758

errno = 0;

1759

ret = seteuid(uid);

1760

if(ret == -1){

1761

perror_plus("seteuid");

1762

}

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);

1763

1704

}

1764

1705

}

1765

1706

1805

1746

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

1806

1747

mc.simple_poll = avahi_simple_poll_new();

1807

1748

if(mc.simple_poll == NULL){

1808

fprintf_plus(stderr,

1809

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

1749

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

1810

1750

exitcode = EX_UNAVAILABLE;

1811

1751

goto end;

1812

1752

}

2004

1944

#endif /* __linux__ */

2005

1945

/* Lower privileges */

2006

1946

errno = 0;

2007

/* Lower privileges */

2008

ret = seteuid(uid);

2009

if(ret == -1){

2010

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

}

2011

1959

}

2012

1960

}

2013

1961

2105

2053

break;

2106

2054

}

2107

2055

if(debug){

2108

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

2109

(int)retry_interval);

2056

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

2110

2057

}

2111

2058

sleep((int)retry_interval);

2112

2059

}

2143

2090

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

2144

2091

if(mc.server == NULL){

2145

2092

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

2146

avahi_strerror(error));

2093

avahi_strerror(error));

2147

2094

exitcode = EX_UNAVAILABLE;

2148

2095

goto end;

2149

2096

}

2158

2105

NULL, 0, browse_callback, NULL);

2159

2106

if(sb == NULL){

2160

2107

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

2161

avahi_strerror(avahi_server_errno(mc.server)));

2108

avahi_strerror(avahi_server_errno(mc.server)));

2162

2109

exitcode = EX_UNAVAILABLE;

2163

2110

goto end;

2164

2111

}

2177

2124

(int)(retry_interval * 1000));

2178

2125

if(debug){

2179

2126

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

2180

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

2127

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

2181

2128

}

2182

2129

2183

2130

end:

2205

2152

if(gpgme_initialized){

2206

2153

gpgme_release(mc.ctx);

2207

2154

}

2208

2155

2209

2156

/* Cleans up the circular linked list of Mandos servers the client

2210

2157

has seen */

2211

2158

if(mc.current_server != NULL){

2217

2164

}

2218

2165

}

2219

2166

2220

/* Re-raise priviliges */

2221

{

2222

if(getuid() == 0){

2223

errno = 0;

2224

ret = seteuid(0);

2225

if(ret == -1){

2226

perror_plus("seteuid");

2227

}

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");

2228

2176

}

2229

2230

/* Run network hooks */

2231

run_network_hooks("stop", interface, delay);

2232

2233

/* Take down the network interface */

2234

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

2177

if(geteuid() == 0){

2235

2178

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

2236

2179

if(ret == -1){

2237

2180

perror_plus("ioctl SIOCGIFFLAGS");

2246

2189

if(ret == -1){

2247

2190

perror_plus("close");

2248

2191

}

2249

}

2250

}

2251

if(getuid() == 0){

2252

/* Lower privileges permanently */

2253

errno = 0;

2254

ret = setuid(uid);

2255

if(ret == -1){

2256

perror_plus("setuid");

2192

/* Lower privileges permanently */

2193

errno = 0;

2194

ret = setuid(uid);

2195

if(ret == -1){

2196

perror_plus("setuid");

2197

}

2257

2198

}

2258

2199

}

2259

2200

2275

2216

}

2276

2217

ret = remove(fullname);

2277

2218

if(ret == -1){

2278

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

2279

strerror(errno));

2219

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

2280

2220

}

2281

2221

free(fullname);

2282

2222

}