/mandos/release : revision 237.16.5

110

init_gnutls_session(),

111

GNUTLS_* */

112

#include <gnutls/openpgp.h>

113

/* gnutls_certificate_set_openpgp_key_file(),

114

GNUTLS_OPENPGP_FMT_BASE64 */

113

/* gnutls_certificate_set_openpgp_key_file(),

114

GNUTLS_OPENPGP_FMT_BASE64 */

115

116

/* GPGME */

117

#include <gpgme.h> /* All GPGME types, constants and

174

perror(print_text);

175

}

176

177

int fprintf_plus(FILE *stream, const char *format, ...){

178

va_list ap;

179

va_start (ap, format);

180

181

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

182

program_invocation_short_name));

183

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

184

}

185

186

177

/*

187

178

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

188

179

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

189

180

* "buffer_length" is how much is already used.

190

181

*/

191

182

size_t incbuffer(char **buffer, size_t buffer_length,

192

size_t buffer_capacity){

183

size_t buffer_capacity){

193

184

if(buffer_length + BUFFER_SIZE > buffer_capacity){

194

185

*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

195

186

if(buffer == NULL){

201

192

}

202

193

203

194

/* Add server to set of servers to retry periodically */

204

int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,

205

int af){

195

int add_server(const char *ip, uint16_t port,

196

AvahiIfIndex if_index,

197

int af){

206

198

int ret;

207

199

server *new_server = malloc(sizeof(server));

208

200

if(new_server == NULL){

210

202

return -1;

211

203

}

212

204

*new_server = (server){ .ip = strdup(ip),

213

.port = port,

214

.if_index = if_index,

215

.af = af };

205

.port = port,

206

.if_index = if_index,

207

.af = af };

216

208

if(new_server->ip == NULL){

217

209

perror_plus("strdup");

218

210

return -1;

240

232

/*

241

233

* Initialize GPGME.

242

234

*/

243

static bool init_gpgme(const char *seckey, const char *pubkey,

244

const char *tempdir){

235

static bool init_gpgme(const char *seckey,

236

const char *pubkey, const char *tempdir){

245

237

gpgme_error_t rc;

246

238

gpgme_engine_info_t engine_info;

247

239

262

254

263

255

rc = gpgme_data_new_from_fd(&pgp_data, fd);

264

256

if(rc != GPG_ERR_NO_ERROR){

265

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

257

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

258

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

259

gpgme_strsource(rc), gpgme_strerror(rc));

267

260

return false;

268

261

}

269

262

270

263

rc = gpgme_op_import(mc.ctx, pgp_data);

271

264

if(rc != GPG_ERR_NO_ERROR){

272

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

273

gpgme_strsource(rc), gpgme_strerror(rc));

265

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

266

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

267

gpgme_strsource(rc), gpgme_strerror(rc));

274

268

return false;

275

269

}

276

270

283

277

}

284

278

285

279

if(debug){

286

fprintf_plus(stderr, "Initializing GPGME\n");

280

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

281

"Initializing GPGME\n");

287

282

}

288

283

289

284

/* Init GPGME */

290

285

gpgme_check_version(NULL);

291

286

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

292

287

if(rc != GPG_ERR_NO_ERROR){

293

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

294

gpgme_strsource(rc), gpgme_strerror(rc));

288

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

289

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

290

gpgme_strsource(rc), gpgme_strerror(rc));

295

291

return false;

296

292

}

297

293

298

294

/* Set GPGME home directory for the OpenPGP engine only */

299

295

rc = gpgme_get_engine_info(&engine_info);

300

296

if(rc != GPG_ERR_NO_ERROR){

301

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

302

gpgme_strsource(rc), gpgme_strerror(rc));

297

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

298

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

299

gpgme_strsource(rc), gpgme_strerror(rc));

303

300

return false;

304

301

}

305

302

while(engine_info != NULL){

311

308

engine_info = engine_info->next;

312

309

}

313

310

if(engine_info == NULL){

314

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

315

tempdir);

311

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

312

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

316

313

return false;

317

314

}

318

315

319

316

/* Create new GPGME "context" */

320

317

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

321

318

if(rc != GPG_ERR_NO_ERROR){

322

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

323

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

324

gpgme_strerror(rc));

319

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

320

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

321

gpgme_strerror(rc));

325

322

return false;

326

323

}

327

324

346

343

ssize_t plaintext_length = 0;

347

344

348

345

if(debug){

349

fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");

346

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

347

"Trying to decrypt OpenPGP data\n");

350

348

}

351

349

352

350

/* Create new GPGME data buffer from memory cryptotext */

353

351

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

354

352

0);

355

353

if(rc != GPG_ERR_NO_ERROR){

356

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

357

gpgme_strsource(rc), gpgme_strerror(rc));

354

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

355

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

356

gpgme_strsource(rc), gpgme_strerror(rc));

358

357

return -1;

359

358

}

360

359

361

360

/* Create new empty GPGME data buffer for the plaintext */

362

361

rc = gpgme_data_new(&dh_plain);

363

362

if(rc != GPG_ERR_NO_ERROR){

364

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

365

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

366

gpgme_strsource(rc), gpgme_strerror(rc));

363

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

364

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

365

gpgme_strsource(rc), gpgme_strerror(rc));

367

366

gpgme_data_release(dh_crypto);

368

367

return -1;

369

368

}

372

371

data buffer */

373

372

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

374

373

if(rc != GPG_ERR_NO_ERROR){

375

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

376

gpgme_strsource(rc), gpgme_strerror(rc));

374

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

375

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

376

gpgme_strsource(rc), gpgme_strerror(rc));

377

plaintext_length = -1;

378

if(debug){

379

gpgme_decrypt_result_t result;

380

result = gpgme_op_decrypt_result(mc.ctx);

381

if(result == NULL){

382

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

382

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

383

"gpgme_op_decrypt_result failed\n");

383

384

} else {

384

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

385

result->unsupported_algorithm);

386

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

387

result->wrong_key_usage);

385

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

386

"Unsupported algorithm: %s\n",

387

result->unsupported_algorithm);

388

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

389

"Wrong key usage: %u\n",

390

result->wrong_key_usage);

388

391

if(result->file_name != NULL){

389

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

392

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

393

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

390

394

}

391

395

gpgme_recipient_t recipient;

392

396

recipient = result->recipients;

393

397

while(recipient != NULL){

394

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

395

gpgme_pubkey_algo_name

396

(recipient->pubkey_algo));

397

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

398

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

399

recipient->status == GPG_ERR_NO_SECKEY

400

? "No" : "Yes");

398

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

399

"Public key algorithm: %s\n",

400

gpgme_pubkey_algo_name(recipient->pubkey_algo));

401

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

402

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

403

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

404

"Secret key available: %s\n",

405

recipient->status == GPG_ERR_NO_SECKEY

406

? "No" : "Yes");

401

407

recipient = recipient->next;

402

408

}

403

409

}

406

412

}

407

413

408

414

if(debug){

409

fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");

415

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

416

"Decryption of OpenPGP data succeeded\n");

410

417

}

411

418

412

419

/* Seek back to the beginning of the GPGME plaintext data buffer */

419

426

*plaintext = NULL;

420

427

while(true){

421

428

plaintext_capacity = incbuffer(plaintext,

422

(size_t)plaintext_length,

423

plaintext_capacity);

429

(size_t)plaintext_length,

430

plaintext_capacity);

424

431

if(plaintext_capacity == 0){

425

perror_plus("incbuffer");

426

plaintext_length = -1;

427

goto decrypt_end;

432

perror_plus("incbuffer");

433

plaintext_length = -1;

434

goto decrypt_end;

428

435

}

429

436

430

437

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

443

450

}

444

451

445

452

if(debug){

446

fprintf_plus(stderr, "Decrypted password is: ");

453

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

454

"Decrypted password is: ");

447

455

for(ssize_t i = 0; i < plaintext_length; i++){

448

456

fprintf(stderr, "%02hhX ", (*plaintext)[i]);

449

457

}

471

479

/* GnuTLS log function callback */

472

480

static void debuggnutls(__attribute__((unused)) int level,

473

481

const char* string){

474

fprintf_plus(stderr, "GnuTLS: %s", string);

482

fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);

475

483

}

476

484

477

485

static int init_gnutls_global(const char *pubkeyfilename,

479

487

int ret;

480

488

481

489

if(debug){

482

fprintf_plus(stderr, "Initializing GnuTLS\n");

490

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

491

"Initializing GnuTLS\n");

483

492

}

484

493

485

494

ret = gnutls_global_init();

486

495

if(ret != GNUTLS_E_SUCCESS){

487

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

488

safer_gnutls_strerror(ret));

496

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

497

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

489

498

return -1;

490

499

}

491

500

509

/* OpenPGP credentials */

501

510

ret = gnutls_certificate_allocate_credentials(&mc.cred);

502

511

if(ret != GNUTLS_E_SUCCESS){

503

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

504

safer_gnutls_strerror(ret));

512

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

513

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

505

514

gnutls_global_deinit();

506

515

return -1;

507

516

}

508

517

509

518

if(debug){

510

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

511

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

512

pubkeyfilename,

513

seckeyfilename);

519

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

520

"Attempting to use OpenPGP public key %s and"

521

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

522

seckeyfilename);

514

523

}

515

524

516

525

ret = gnutls_certificate_set_openpgp_key_file

517

526

(mc.cred, pubkeyfilename, seckeyfilename,

518

527

GNUTLS_OPENPGP_FMT_BASE64);

519

528

if(ret != GNUTLS_E_SUCCESS){

520

fprintf_plus(stderr,

521

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

522

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

523

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

524

safer_gnutls_strerror(ret));

529

fprintf(stderr,

530

"Mandos plugin mandos-client: "

531

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

532

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

533

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

534

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

525

535

goto globalfail;

526

536

}

527

537

528

538

/* GnuTLS server initialization */

529

539

ret = gnutls_dh_params_init(&mc.dh_params);

530

540

if(ret != GNUTLS_E_SUCCESS){

531

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

532

" initialization: %s\n",

533

safer_gnutls_strerror(ret));

541

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

542

"Error in GnuTLS DH parameter initialization:"

543

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

534

544

goto globalfail;

535

545

}

536

546

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

537

547

if(ret != GNUTLS_E_SUCCESS){

538

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

539

safer_gnutls_strerror(ret));

548

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

549

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

550

safer_gnutls_strerror(ret));

540

551

goto globalfail;

541

552

}

542

553

562

573

}

563

574

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

564

575

if(ret != GNUTLS_E_SUCCESS){

565

fprintf_plus(stderr,

566

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

567

safer_gnutls_strerror(ret));

576

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

577

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

578

safer_gnutls_strerror(ret));

568

579

}

569

580

570

581

{

577

588

}

578

589

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

579

590

if(ret != GNUTLS_E_SUCCESS){

580

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

581

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

582

safer_gnutls_strerror(ret));

591

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

592

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

593

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

594

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

583

595

gnutls_deinit(*session);

584

596

return -1;

585

597

}

594

606

}

595

607

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

596

608

if(ret != GNUTLS_E_SUCCESS){

597

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

598

safer_gnutls_strerror(ret));

609

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

610

"Error setting GnuTLS credentials: %s\n",

611

safer_gnutls_strerror(ret));

599

612

gnutls_deinit(*session);

600

613

return -1;

601

614

}

646

659

pf = PF_INET;

647

660

break;

648

661

default:

649

fprintf_plus(stderr, "Bad address family: %d\n", af);

662

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

663

"Bad address family: %d\n", af);

650

664

errno = EINVAL;

651

665

return -1;

652

666

}

657

671

}

658

672

659

673

if(debug){

660

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

661

PRIu16 "\n", ip, port);

674

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

675

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

676

"\n", ip, port);

662

677

}

663

678

664

679

tcp_sd = socket(pf, SOCK_STREAM, 0);

690

705

}

691

706

if(ret == 0){

692

707

int e = errno;

693

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

708

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

709

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

694

710

errno = e;

695

711

goto mandos_end;

696

712

}

701

717

702

718

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

703

719

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

704

-Wunreachable-code*/

720

-Wunreachable-code*/

705

721

if(if_index == AVAHI_IF_UNSPEC){

706

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

707

" incomplete without a network interface\n");

722

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

723

"An IPv6 link-local address is incomplete"

724

" without a network interface\n");

708

725

errno = EINVAL;

709

726

goto mandos_end;

710

727

}

728

745

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

729

746

perror_plus("if_indextoname");

730

747

} else {

731

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

732

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

748

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

749

"Connection to: %s%%%s, port %" PRIu16 "\n",

750

ip, interface, port);

733

751

}

734

752

} else {

735

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

736

ip, port);

753

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

754

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

737

755

}

738

756

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

739

757

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

749

767

perror_plus("inet_ntop");

750

768

} else {

751

769

if(strcmp(addrstr, ip) != 0){

752

fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);

770

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

771

"Canonical address form: %s\n", addrstr);

753

772

}

754

773

}

755

774

}

783

802

while(true){

784

803

size_t out_size = strlen(out);

785

804

ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

786

out_size - written));

805

out_size - written));

787

806

if(ret == -1){

788

807

int e = errno;

789

808

perror_plus("write");

809

828

}

810

829

811

830

if(debug){

812

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

831

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

832

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

813

833

}

814

834

815

835

if(quit_now){

835

855

836

856

if(ret != GNUTLS_E_SUCCESS){

837

857

if(debug){

838

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

858

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

859

"*** GnuTLS Handshake failed ***\n");

839

860

gnutls_perror(ret);

840

861

}

841

862

errno = EPROTO;

845

866

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

846

867

847

868

if(debug){

848

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

849

" %s\n", ip);

869

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

870

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

850

871

}

851

872

852

873

while(true){

857

878

}

858

879

859

880

buffer_capacity = incbuffer(&buffer, buffer_length,

860

buffer_capacity);

881

buffer_capacity);

861

882

if(buffer_capacity == 0){

862

883

int e = errno;

863

884

perror_plus("incbuffer");

890

911

}

891

912

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

892

913

if(ret < 0){

893

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

894

"***\n");

914

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

915

"*** GnuTLS Re-handshake failed ***\n");

895

916

gnutls_perror(ret);

896

917

errno = EPROTO;

897

918

goto mandos_end;

898

919

}

899

920

break;

900

921

default:

901

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

902

" encrypted session with Mandos server\n");

922

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

923

"Unknown error while reading data from"

924

" encrypted session with Mandos server\n");

903

925

gnutls_bye(session, GNUTLS_SHUT_RDWR);

904

926

errno = EIO;

905

927

goto mandos_end;

910

932

}

911

933

912

934

if(debug){

913

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

935

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

936

"Closing TLS session\n");

914

937

}

915

938

916

939

if(quit_now){

928

951

929

952

if(buffer_length > 0){

930

953

ssize_t decrypted_buffer_size;

931

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

954

decrypted_buffer_size = pgp_packet_decrypt(buffer,

955

buffer_length,

932

956

&decrypted_buffer);

933

957

if(decrypted_buffer_size >= 0){

934

958

945

969

if(ret == 0 and ferror(stdout)){

946

970

int e = errno;

947

971

if(debug){

948

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

949

strerror(errno));

972

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

973

"Error writing encrypted data: %s\n",

974

strerror(errno));

950

975

}

951

976

errno = e;

952

977

goto mandos_end;

1009

1034

switch(event){

1010

1035

default:

1011

1036

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)));

1037

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

1038

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

1039

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

1040

avahi_strerror(avahi_server_errno(mc.server)));

1016

1041

break;

1017

1042

1018

1043

case AVAHI_RESOLVER_FOUND:

1020

1045

char ip[AVAHI_ADDRESS_STR_MAX];

1021

1046

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

1022

1047

if(debug){

1023

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);

1048

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

1049

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

1050

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

1051

ip, (intmax_t)interface, port);

1026

1052

}

1027

1053

int ret = start_mandos_communication(ip, port, interface,

1028

1054

avahi_proto_to_af(proto));

1060

1086

default:

1061

1087

case AVAHI_BROWSER_FAILURE:

1062

1088

1063

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

1064

avahi_strerror(avahi_server_errno(mc.server)));

1089

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

1090

"(Avahi browser) %s\n",

1091

avahi_strerror(avahi_server_errno(mc.server)));

1065

1092

avahi_simple_poll_quit(mc.simple_poll);

1066

1093

return;

1067

1094

1074

1101

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

1075

1102

name, type, domain, protocol, 0,

1076

1103

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)));

1104

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

1105

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

1106

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

1080

1107

break;

1081

1108

1082

1109

case AVAHI_BROWSER_REMOVE:

1085

1112

case AVAHI_BROWSER_ALL_FOR_NOW:

1086

1113

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1087

1114

if(debug){

1088

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

1089

" searching...\n");

1115

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

1116

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

1090

1117

}

1091

1118

break;

1092

1119

}

1131

1158

/* Reject the loopback device */

1132

1159

if(ifr->ifr_flags & IFF_LOOPBACK){

1133

1160

if(debug){

1134

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

1135

ifname);

1161

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

1162

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

1136

1163

}

1137

1164

return false;

1138

1165

}

1139

1166

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

1140

1167

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

1141

1168

if(debug){

1142

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

1143

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

1169

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

1170

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

1144

1171

}

1145

1172

return true;

1146

1173

}

1147

1174

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

1148

1175

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

1149

1176

if(debug){

1150

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1151

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

1177

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

1178

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

1152

1179

}

1153

1180

return false;

1154

1181

}

1155

1182

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

1156

1183

if(ifr->ifr_flags & IFF_NOARP){

1157

1184

if(debug){

1158

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

1159

ifname);

1185

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

1186

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

1160

1187

}

1161

1188

return false;

1162

1189

}

1163

1190

1164

1191

/* Accept this device */

1165

1192

if(debug){

1166

fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);

1193

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

1194

"Interface \"%s\" is good\n", ifname);

1167

1195

}

1168

1196

return true;

1169

1197

}

1181

1209

struct ifreq ifr;

1182

1210

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

1183

1211

if(debug){

1184

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

1185

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

1212

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

1213

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

1214

if_entry->d_name);

1186

1215

}

1187

1216

return 0;

1188

1217

}

1206

1235

struct ifreq ifr;

1207

1236

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

1208

1237

if(debug){

1209

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

1210

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

1238

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

1239

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

1240

if_entry->d_name);

1211

1241

}

1212

1242

return 0;

1213

1243

}

1215

1245

/* Reject down interfaces */

1216

1246

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

1217

1247

if(debug){

1218

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

1219

if_entry->d_name);

1248

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

1249

"Rejecting down interface \"%s\"\n",

1250

if_entry->d_name);

1220

1251

}

1221

1252

return 0;

1222

1253

}

1224

1255

/* Reject non-running interfaces */

1225

1256

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

1226

1257

if(debug){

1227

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

1228

if_entry->d_name);

1258

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

1259

"Rejecting non-running interface \"%s\"\n",

1260

if_entry->d_name);

1229

1261

}

1230

1262

return 0;

1231

1263

}

1250

1282

/* Is this directory entry a runnable program? */

1251

1283

int runnable_hook(const struct dirent *direntry){

1252

1284

int ret;

1253

size_t sret;

1254

1285

struct stat st;

1255

1286

1256

1287

if((direntry->d_name)[0] == '\0'){

1258

1289

return 0;

1259

1290

}

1260

1291

1261

sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

1262

"abcdefghijklmnopqrstuvwxyz"

1263

"0123456789"

1264

"_-");

1265

if((direntry->d_name)[sret] != '\0'){

1266

/* Contains non-allowed characters */

1267

if(debug){

1268

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

1269

direntry->d_name);

1270

}

1271

return 0;

1272

}

1292

/* Save pointer to last character */

1293

char *end = strchr(direntry->d_name, '\0')-1;

1294

1295

if(*end == '~'){

1296

/* Backup name~ */

1297

return 0;

1298

}

1299

1300

if(((direntry->d_name)[0] == '#')

1301

and (*end == '#')){

1302

/* Temporary #name# */

1303

return 0;

1304

}

1305

1306

/* XXX more rules here */

1273

1307

1274

1308

char *fullname = NULL;

1275

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

1309

ret = asprintf(&fullname, "%s/%s", hookdir,

1310

direntry->d_name);

1276

1311

if(ret < 0){

1277

1312

perror_plus("asprintf");

1278

1313

return 0;

1281

1316

ret = stat(fullname, &st);

1282

1317

if(ret == -1){

1283

1318

if(debug){

1284

perror_plus("Could not stat hook");

1319

perror_plus("Could not stat plugin");

1285

1320

}

1286

1321

return 0;

1287

1322

}

1288

1323

if(not (S_ISREG(st.st_mode))){

1289

1324

/* Not a regular file */

1290

if(debug){

1291

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

1292

direntry->d_name);

1293

}

1294

1325

return 0;

1295

1326

}

1296

1327

if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){

1297

1328

/* Not executable */

1298

if(debug){

1299

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

1300

direntry->d_name);

1301

}

1302

1329

return 0;

1303

1330

}

1304

if(debug){

1305

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

1306

direntry->d_name);

1307

}

1308

1331

return 1;

1309

1332

}

1310

1333

1317

1340

while(true){

1318

1341

if(mc.current_server == NULL){

1319

1342

if (debug){

1320

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

1321

" No timeout!\n");

1343

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

1344

"Wait until first server is found. No timeout!\n");

1322

1345

}

1323

1346

ret = avahi_simple_poll_iterate(s, -1);

1324

1347

} else {

1325

1348

if (debug){

1326

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

1327

" it, or wait\n");

1349

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

1350

"Check current_server if we should run it,"

1351

" or wait\n");

1328

1352

}

1329

1353

/* the current time */

1330

1354

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1346

1370

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

1347

1371

1348

1372

if (debug){

1349

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

1350

block_time);

1373

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

1374

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

1351

1375

}

1352

1376

1353

1377

if(block_time <= 0){

1380

1404

}

1381

1405

}

1382

1406

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

1407

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

1487

1408

AvahiSServiceBrowser *sb = NULL;

1488

1409

int error;

1646

1567

argp_state_help(state, state->out_stream,

1647

1568

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1648

1569

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

1649

fprintf_plus(state->out_stream,

1650

"Mandos plugin mandos-client: ");

1651

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

1570

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

1571

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

1652

1572

exit(argp_err_exit_status);

1653

1573

break;

1654

1574

default:

1678

1598

}

1679

1599

}

1680

1600

1681

if(getuid() == 0){

1601

{

1682

1602

/* Work around Debian bug #633582:

1683

1603

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

1684

1604

struct stat st;

1699

1619

if(ret == -1){

1700

1620

perror_plus("fstat");

1701

1621

} else {

1702

if(S_ISREG(st.st_mode)

1703

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

1622

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

1704

1623

ret = fchown(seckey_fd, uid, gid);

1705

1624

if(ret == -1){

1706

1625

perror_plus("fchown");

1720

1639

if(ret == -1){

1721

1640

perror_plus("fstat");

1722

1641

} else {

1723

if(S_ISREG(st.st_mode)

1724

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

1642

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

1725

1643

ret = fchown(pubkey_fd, uid, gid);

1726

1644

if(ret == -1){

1727

1645

perror_plus("fchown");

1740

1658

}

1741

1659

}

1742

1660

1743

/* Run network hooks */

1661

/* Find network hooks and run them */

1744

1662

{

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

}

1663

struct dirent **direntries;

1664

struct dirent *direntry;

1665

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

1666

alphasort);

1667

if(numhooks == -1){

1668

perror_plus("scandir");

1669

} else {

1670

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

1671

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

1672

direntry = direntries[0];

1673

char *fullname = NULL;

1674

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

1675

if(ret < 0){

1676

perror_plus("asprintf");

1677

continue;

1678

}

1679

pid_t hook_pid = fork();

1680

if(hook_pid == 0){

1681

/* Child */

1682

dup2(devnull, STDIN_FILENO);

1683

close(devnull);

1684

dup2(STDERR_FILENO, STDOUT_FILENO);

1685

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

1686

if(ret == -1){

1687

perror_plus("setenv");

1688

exit(1);

1689

}

1690

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

1691

if(ret == -1){

1692

perror_plus("setenv");

1693

exit(1);

1694

}

1695

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

1696

if(ret == -1){

1697

perror_plus("setenv");

1698

exit(1);

1699

}

1700

char *delaystring;

1701

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

1702

if(ret == -1){

1703

perror_plus("asprintf");

1704

exit(1);

1705

}

1706

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

1707

if(ret == -1){

1708

free(delaystring);

1709

perror_plus("setenv");

1710

exit(1);

1711

}

1712

free(delaystring);

1713

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

1714

perror_plus("execl");

1715

} else {

1716

int status;

1717

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

1718

perror_plus("waitpid");

1719

free(fullname);

1720

continue;

1721

}

1722

if(WIFEXITED(status)){

1723

if(WEXITSTATUS(status) != 0){

1724

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

1725

"Warning: network hook \"%s\" exited"

1726

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

1727

WEXITSTATUS(status));

1728

free(fullname);

1729

continue;

1730

}

1731

} else if(WIFSIGNALED(status)){

1732

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

1733

"Warning: network hook \"%s\" died by"

1734

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

1735

WTERMSIG(status));

1736

free(fullname);

1737

continue;

1738

} else {

1739

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

1740

"Warning: network hook \"%s\" crashed\n",

1741

direntry->d_name);

1742

free(fullname);

1743

continue;

1744

}

1745

}

1746

free(fullname);

1747

if(quit_now){

1748

goto end;

1749

}

1750

}

1751

close(devnull);

1763

1752

}

1764

1753

}

1765

1754

1782

1771

/* Pick the first interface returned */

1783

1772

interface = strdup(direntries[0]->d_name);

1784

1773

if(debug){

1785

fprintf_plus(stderr, "Using interface \"%s\"\n", interface);

1774

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

1775

"Using interface \"%s\"\n", interface);

1786

1776

}

1787

1777

if(interface == NULL){

1788

1778

perror_plus("malloc");

1793

1783

free(direntries);

1794

1784

} else {

1795

1785

free(direntries);

1796

fprintf_plus(stderr, "Could not find a network interface\n");

1786

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

1787

"Could not find a network interface\n");

1797

1788

exitcode = EXIT_FAILURE;

1798

1789

goto end;

1799

1790

}

1805

1796

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

1806

1797

mc.simple_poll = avahi_simple_poll_new();

1807

1798

if(mc.simple_poll == NULL){

1808

fprintf_plus(stderr,

1809

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

1799

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

1800

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

1810

1801

exitcode = EX_UNAVAILABLE;

1811

1802

goto end;

1812

1803

}

1878

1869

if(strcmp(interface, "none") != 0){

1879

1870

if_index = (AvahiIfIndex) if_nametoindex(interface);

1880

1871

if(if_index == 0){

1881

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

1872

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

1873

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

1882

1874

exitcode = EX_UNAVAILABLE;

1883

1875

goto end;

1884

1876

}

2004

1996

#endif /* __linux__ */

2005

1997

/* Lower privileges */

2006

1998

errno = 0;

2007

/* Lower privileges */

2008

ret = seteuid(uid);

2009

if(ret == -1){

2010

perror_plus("seteuid");

1999

if(take_down_interface){

2000

/* Lower privileges */

2001

ret = seteuid(uid);

2002

if(ret == -1){

2003

perror_plus("seteuid");

2004

}

2005

} else {

2006

/* Lower privileges permanently */

2007

ret = setuid(uid);

2008

if(ret == -1){

2009

perror_plus("setuid");

2010

}

2011

}

2012

}

2013

2017

2018

ret = init_gnutls_global(pubkey, seckey);

2019

if(ret == -1){

2020

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

2020

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

2021

"init_gnutls_global failed\n");

2021

2022

exitcode = EX_UNAVAILABLE;

2022

2023

goto end;

2023

2024

} else {

2039

2040

}

2040

2041

2042

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

2042

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

2043

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

2044

"init_gpgme failed\n");

2043

2045

exitcode = EX_UNAVAILABLE;

2044

2046

goto end;

2045

2047

} else {

2055

2057

/* (Mainly meant for debugging) */

2056

2058

char *address = strrchr(connect_to, ':');

2057

2059

if(address == NULL){

2058

fprintf_plus(stderr, "No colon in address\n");

2060

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

2061

"No colon in address\n");

2059

2062

exitcode = EX_USAGE;

2060

2063

goto end;

2061

2064

}

2069

2072

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

2070

2073

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

2071

2074

or tmpmax != (uint16_t)tmpmax){

2072

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

2075

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

2076

"Bad port number\n");

2073

2077

exitcode = EX_USAGE;

2074

2078

goto end;

2075

2079

}

2105

2109

break;

2106

2110

}

2107

2111

if(debug){

2108

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

2109

(int)retry_interval);

2112

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

2113

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

2110

2114

}

2111

2115

sleep((int)retry_interval);

2112

2116

}

2142

2146

2143

2147

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

2144

2148

if(mc.server == NULL){

2145

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

2146

avahi_strerror(error));

2149

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

2150

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

2151

avahi_strerror(error));

2147

2152

exitcode = EX_UNAVAILABLE;

2148

2153

goto end;

2149

2154

}

2157

2162

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2158

2163

NULL, 0, browse_callback, NULL);

2159

2164

if(sb == NULL){

2160

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

2161

avahi_strerror(avahi_server_errno(mc.server)));

2165

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

2166

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

2167

avahi_strerror(avahi_server_errno(mc.server)));

2162

2168

exitcode = EX_UNAVAILABLE;

2163

2169

goto end;

2164

2170

}

2170

2176

/* Run the main loop */

2171

2177

2172

2178

if(debug){

2173

fprintf_plus(stderr, "Starting Avahi loop search\n");

2179

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

2180

"Starting Avahi loop search\n");

2174

2181

}

2175

2182

2176

2183

ret = avahi_loop_with_timeout(mc.simple_poll,

2177

2184

(int)(retry_interval * 1000));

2178

2185

if(debug){

2179

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

2180

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

2186

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

2187

"avahi_loop_with_timeout exited %s\n",

2188

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

2181

2189

}

2182

2190

2183

2191

end:

2184

2192

2185

2193

if(debug){

2186

fprintf_plus(stderr, "%s exiting\n", argv[0]);

2194

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

2195

"%s exiting\n", argv[0]);

2187

2196

}

2188

2197

2189

2198

/* Cleanup things */

2205

2214

if(gpgme_initialized){

2206

2215

gpgme_release(mc.ctx);

2207

2216

}

2208

2217

2209

2218

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

2210

2219

has seen */

2211

2220

if(mc.current_server != NULL){

2217

2226

}

2218

2227

}

2219

2228

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

}

2229

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

2230

2231

/* Take down the network interface */

2232

if(take_down_interface){

2233

/* Re-raise priviliges */

2234

errno = 0;

2235

ret = seteuid(0);

2236

if(ret == -1){

2237

perror_plus("seteuid");

2228

2238

}

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){

2239

if(geteuid() == 0){

2235

2240

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

2236

2241

if(ret == -1){

2237

2242

perror_plus("ioctl SIOCGIFFLAGS");

2246

2251

if(ret == -1){

2247

2252

perror_plus("close");

2248

2253

}

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");

2254

/* Lower privileges permanently */

2255

errno = 0;

2256

ret = setuid(uid);

2257

if(ret == -1){

2258

perror_plus("setuid");

2259

}

2257

2260

}

2258

2261

}

2259

2262

2275

2278

}

2276

2279

ret = remove(fullname);

2277

2280

if(ret == -1){

2278

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

2279

strerror(errno));

2281

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

2282

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

2280

2283

}

2281

2284

free(fullname);

2282

2285

}