/mandos/release : revision 237.7.79

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* "browse_callback", and parts of "main".

10

*

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* Everything else is

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12

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*

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* This program is free software: you can redistribute it and/or

16

* modify it under the terms of the GNU General Public License as

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* along with this program. If not, see

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* <http://www.gnu.org/licenses/>.

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*

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* Contact the authors at <mandos@fukt.bsnet.se>.

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* Contact the authors at <mandos@recompile.se>.

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*/

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32

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

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sockaddr_in6, PF_INET6,

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SOCK_STREAM, uid_t, gid_t, open(),

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opendir(), DIR */

56

#include <sys/stat.h> /* open() */

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#include <sys/stat.h> /* open(), S_ISREG */

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#include <sys/socket.h> /* socket(), struct sockaddr_in6,

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inet_pton(), connect() */

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

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

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strtoimax() */

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

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

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

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

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program_invocation_short_name */

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

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#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

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SIOCSIFFLAGS, if_indextoname(),

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if_nametoindex(), IF_NAMESIZE */

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73

*/

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

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

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setgid(), pause() */

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

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setgid(), pause(), _exit() */

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

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

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79

#include <argp.h> /* struct argp_option, error_t, struct

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argp_state, struct argp,

84

85

raise() */

85

86

#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,

86

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

#include <sys/wait.h> /* waitpid(), WIFEXITED(),

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WEXITSTATUS(), WTERMSIG() */

90

#include <grp.h> /* setgroups() */

87

91

88

92

#ifdef __linux__

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93

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

107

111

init_gnutls_session(),

108

112

GNUTLS_* */

109

113

#include <gnutls/openpgp.h>

110

/* gnutls_certificate_set_openpgp_key_file(),

111

GNUTLS_OPENPGP_FMT_BASE64 */

114

/* gnutls_certificate_set_openpgp_key_file(),

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GNUTLS_OPENPGP_FMT_BASE64 */

112

116

113

117

/* GPGME */

114

118

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

122

126

#define PATHDIR "/conf/conf.d/mandos"

123

127

#define SECKEY "seckey.txt"

124

128

#define PUBKEY "pubkey.txt"

129

#define HOOKDIR "/lib/mandos/network-hooks.d"

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130

126

131

bool debug = false;

127

132

static const char mandos_protocol_version[] = "1";

128

133

const char *argp_program_version = "mandos-client " VERSION;

129

const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

134

const char *argp_program_bug_address = "<mandos@recompile.se>";

130

135

static const char sys_class_net[] = "/sys/class/net";

131

136

char *connect_to = NULL;

137

const char *hookdir = HOOKDIR;

138

139

/* Doubly linked list that need to be circularly linked when used */

140

typedef struct server{

141

const char *ip;

142

uint16_t port;

143

AvahiIfIndex if_index;

144

int af;

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struct timespec last_seen;

146

struct server *next;

147

struct server *prev;

148

} server;

132

149

133

150

/* Used for passing in values through the Avahi callback functions */

134

151

typedef struct {

139

156

gnutls_dh_params_t dh_params;

140

157

const char *priority;

141

158

gpgme_ctx_t ctx;

159

server *current_server;

142

160

} mandos_context;

143

161

144

162

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

145

163

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

146

164

.dh_bits = 1024, .priority = "SECURE256"

147

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

165

":!CTYPE-X.509:+CTYPE-OPENPGP",

166

.current_server = NULL };

148

167

149

168

sig_atomic_t quit_now = 0;

150

169

int signal_received = 0;

151

170

171

/* Function to use when printing errors */

172

void perror_plus(const char *print_text){

173

fprintf(stderr, "Mandos plugin %s: ",

174

program_invocation_short_name);

175

perror(print_text);

176

}

177

178

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

179

va_list ap;

180

va_start (ap, format);

181

182

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

183

program_invocation_short_name));

184

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

185

}

186

152

187

/*

153

188

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

154

189

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

155

190

* "buffer_length" is how much is already used.

156

191

*/

157

192

size_t incbuffer(char **buffer, size_t buffer_length,

158

size_t buffer_capacity){

193

size_t buffer_capacity){

159

194

if(buffer_length + BUFFER_SIZE > buffer_capacity){

160

195

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

161

196

if(buffer == NULL){

166

201

return buffer_capacity;

167

202

}

168

203

204

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

205

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

206

int af){

207

int ret;

208

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

209

if(new_server == NULL){

210

perror_plus("malloc");

211

return false;

212

}

213

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

214

.port = port,

215

.if_index = if_index,

216

.af = af };

217

if(new_server->ip == NULL){

218

perror_plus("strdup");

219

return false;

220

}

221

/* Special case of first server */

222

if (mc.current_server == NULL){

223

new_server->next = new_server;

224

new_server->prev = new_server;

225

mc.current_server = new_server;

226

/* Place the new server last in the list */

227

} else {

228

new_server->next = mc.current_server;

229

new_server->prev = mc.current_server->prev;

230

new_server->prev->next = new_server;

231

mc.current_server->prev = new_server;

232

}

233

ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);

234

if(ret == -1){

235

perror_plus("clock_gettime");

236

return false;

237

}

238

return true;

239

}

240

169

241

/*

170

242

* Initialize GPGME.

171

243

*/

172

static bool init_gpgme(const char *seckey,

173

const char *pubkey, const char *tempdir){

244

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

245

const char *tempdir){

174

246

gpgme_error_t rc;

175

247

gpgme_engine_info_t engine_info;

176

248

185

257

186

258

fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));

187

259

if(fd == -1){

188

perror("open");

260

perror_plus("open");

189

261

return false;

190

262

}

191

263

192

264

rc = gpgme_data_new_from_fd(&pgp_data, fd);

193

265

if(rc != GPG_ERR_NO_ERROR){

194

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

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gpgme_strsource(rc), gpgme_strerror(rc));

266

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

267

gpgme_strsource(rc), gpgme_strerror(rc));

196

268

return false;

197

269

}

198

270

199

271

rc = gpgme_op_import(mc.ctx, pgp_data);

200

272

if(rc != GPG_ERR_NO_ERROR){

201

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

202

gpgme_strsource(rc), gpgme_strerror(rc));

273

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

274

gpgme_strsource(rc), gpgme_strerror(rc));

203

275

return false;

204

276

}

205

277

206

278

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

207

279

if(ret == -1){

208

perror("close");

280

perror_plus("close");

209

281

}

210

282

gpgme_data_release(pgp_data);

211

283

return true;

212

284

}

213

285

214

286

if(debug){

215

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

287

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

216

288

}

217

289

218

290

/* Init GPGME */

219

291

gpgme_check_version(NULL);

220

292

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

221

293

if(rc != GPG_ERR_NO_ERROR){

222

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

223

gpgme_strsource(rc), gpgme_strerror(rc));

294

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

295

gpgme_strsource(rc), gpgme_strerror(rc));

224

296

return false;

225

297

}

226

298

227

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

299

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

228

300

rc = gpgme_get_engine_info(&engine_info);

229

301

if(rc != GPG_ERR_NO_ERROR){

230

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

231

gpgme_strsource(rc), gpgme_strerror(rc));

302

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

303

gpgme_strsource(rc), gpgme_strerror(rc));

232

304

return false;

233

305

}

234

306

while(engine_info != NULL){

240

312

engine_info = engine_info->next;

241

313

}

242

314

if(engine_info == NULL){

243

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

315

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

316

tempdir);

244

317

return false;

245

318

}

246

319

247

320

/* Create new GPGME "context" */

248

321

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

249

322

if(rc != GPG_ERR_NO_ERROR){

250

fprintf(stderr, "bad gpgme_new: %s: %s\n",

251

gpgme_strsource(rc), gpgme_strerror(rc));

323

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

324

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

325

gpgme_strerror(rc));

252

326

return false;

253

327

}

254

328

273

347

ssize_t plaintext_length = 0;

274

348

275

349

if(debug){

276

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

350

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

277

351

}

278

352

279

353

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

280

354

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

281

355

0);

282

356

if(rc != GPG_ERR_NO_ERROR){

283

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

284

gpgme_strsource(rc), gpgme_strerror(rc));

357

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

358

gpgme_strsource(rc), gpgme_strerror(rc));

285

359

return -1;

286

360

}

287

361

288

362

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

289

363

rc = gpgme_data_new(&dh_plain);

290

364

if(rc != GPG_ERR_NO_ERROR){

291

fprintf(stderr, "bad gpgme_data_new: %s: %s\n",

292

gpgme_strsource(rc), gpgme_strerror(rc));

365

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

366

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

367

gpgme_strsource(rc), gpgme_strerror(rc));

293

368

gpgme_data_release(dh_crypto);

294

369

return -1;

295

370

}

298

373

data buffer */

299

374

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

300

375

if(rc != GPG_ERR_NO_ERROR){

301

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

302

gpgme_strsource(rc), gpgme_strerror(rc));

376

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

377

gpgme_strsource(rc), gpgme_strerror(rc));

303

378

plaintext_length = -1;

304

379

if(debug){

305

380

gpgme_decrypt_result_t result;

306

381

result = gpgme_op_decrypt_result(mc.ctx);

307

382

if(result == NULL){

308

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

383

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

309

384

} else {

310

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

311

result->unsupported_algorithm);

312

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

313

result->wrong_key_usage);

385

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

386

result->unsupported_algorithm);

387

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

388

result->wrong_key_usage);

314

389

if(result->file_name != NULL){

315

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

390

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

316

391

}

317

392

gpgme_recipient_t recipient;

318

393

recipient = result->recipients;

319

394

while(recipient != NULL){

320

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

321

gpgme_pubkey_algo_name(recipient->pubkey_algo));

322

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

323

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

324

recipient->status == GPG_ERR_NO_SECKEY

325

? "No" : "Yes");

395

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

396

gpgme_pubkey_algo_name

397

(recipient->pubkey_algo));

398

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

399

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

400

recipient->status == GPG_ERR_NO_SECKEY

401

? "No" : "Yes");

326

402

recipient = recipient->next;

327

403

}

328

404

}

331

407

}

332

408

333

409

if(debug){

334

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

410

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

335

411

}

336

412

337

413

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

338

414

if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){

339

perror("gpgme_data_seek");

415

perror_plus("gpgme_data_seek");

340

416

plaintext_length = -1;

341

417

goto decrypt_end;

342

418

}

344

420

*plaintext = NULL;

345

421

while(true){

346

422

plaintext_capacity = incbuffer(plaintext,

347

(size_t)plaintext_length,

348

plaintext_capacity);

423

(size_t)plaintext_length,

424

plaintext_capacity);

349

425

if(plaintext_capacity == 0){

350

perror("incbuffer");

351

plaintext_length = -1;

352

goto decrypt_end;

426

perror_plus("incbuffer");

427

plaintext_length = -1;

428

goto decrypt_end;

353

429

}

354

430

355

431

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

360

436

break;

361

437

}

362

438

if(ret < 0){

363

perror("gpgme_data_read");

439

perror_plus("gpgme_data_read");

364

440

plaintext_length = -1;

365

441

goto decrypt_end;

366

442

}

368

444

}

369

445

370

446

if(debug){

371

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

447

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

372

448

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

373

449

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

374

450

}

396

472

/* GnuTLS log function callback */

397

473

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

398

474

const char* string){

399

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

475

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

400

476

}

401

477

402

478

static int init_gnutls_global(const char *pubkeyfilename,

404

480

int ret;

405

481

406

482

if(debug){

407

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

483

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

408

484

}

409

485

410

486

ret = gnutls_global_init();

411

487

if(ret != GNUTLS_E_SUCCESS){

412

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

413

safer_gnutls_strerror(ret));

488

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

489

safer_gnutls_strerror(ret));

414

490

return -1;

415

491

}

416

492

423

499

}

424

500

425

501

/* OpenPGP credentials */

426

gnutls_certificate_allocate_credentials(&mc.cred);

502

ret = gnutls_certificate_allocate_credentials(&mc.cred);

427

503

if(ret != GNUTLS_E_SUCCESS){

428

fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning

429

from

430

-Wunreachable-code

431

*/

432

safer_gnutls_strerror(ret));

504

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

505

safer_gnutls_strerror(ret));

433

506

gnutls_global_deinit();

434

507

return -1;

435

508

}

436

509

437

510

if(debug){

438

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

439

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

440

seckeyfilename);

511

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

512

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

513

pubkeyfilename,

514

seckeyfilename);

441

515

}

442

516

443

517

ret = gnutls_certificate_set_openpgp_key_file

444

518

(mc.cred, pubkeyfilename, seckeyfilename,

445

519

GNUTLS_OPENPGP_FMT_BASE64);

446

520

if(ret != GNUTLS_E_SUCCESS){

447

fprintf(stderr,

448

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

449

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

450

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

451

safer_gnutls_strerror(ret));

521

fprintf_plus(stderr,

522

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

523

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

524

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

525

safer_gnutls_strerror(ret));

452

526

goto globalfail;

453

527

}

454

528

455

529

/* GnuTLS server initialization */

456

530

ret = gnutls_dh_params_init(&mc.dh_params);

457

531

if(ret != GNUTLS_E_SUCCESS){

458

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

459

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

532

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

533

" initialization: %s\n",

534

safer_gnutls_strerror(ret));

460

535

goto globalfail;

461

536

}

462

537

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

463

538

if(ret != GNUTLS_E_SUCCESS){

464

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

465

safer_gnutls_strerror(ret));

539

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

540

safer_gnutls_strerror(ret));

466

541

goto globalfail;

467

542

}

468

543

488

563

}

489

564

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

490

565

if(ret != GNUTLS_E_SUCCESS){

491

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

492

safer_gnutls_strerror(ret));

566

fprintf_plus(stderr,

567

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

568

safer_gnutls_strerror(ret));

493

569

}

494

570

495

571

{

502

578

}

503

579

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

504

580

if(ret != GNUTLS_E_SUCCESS){

505

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

506

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

507

safer_gnutls_strerror(ret));

581

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

582

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

583

safer_gnutls_strerror(ret));

508

584

gnutls_deinit(*session);

509

585

return -1;

510

586

}

519

595

}

520

596

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

521

597

if(ret != GNUTLS_E_SUCCESS){

522

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

523

safer_gnutls_strerror(ret));

598

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

599

safer_gnutls_strerror(ret));

524

600

gnutls_deinit(*session);

525

601

return -1;

526

602

}

571

647

pf = PF_INET;

572

648

break;

573

649

default:

574

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

650

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

575

651

errno = EINVAL;

576

652

return -1;

577

653

}

582

658

}

583

659

584

660

if(debug){

585

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

586

"\n", ip, port);

661

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

662

PRIu16 "\n", ip, port);

587

663

}

588

664

589

665

tcp_sd = socket(pf, SOCK_STREAM, 0);

590

666

if(tcp_sd < 0){

591

667

int e = errno;

592

perror("socket");

668

perror_plus("socket");

593

669

errno = e;

594

670

goto mandos_end;

595

671

}

609

685

}

610

686

if(ret < 0 ){

611

687

int e = errno;

612

perror("inet_pton");

688

perror_plus("inet_pton");

613

689

errno = e;

614

690

goto mandos_end;

615

691

}

616

692

if(ret == 0){

617

693

int e = errno;

618

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

694

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

619

695

errno = e;

620

696

goto mandos_end;

621

697

}

626

702

627

703

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

628

704

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

629

-Wunreachable-code*/

705

-Wunreachable-code*/

630

706

if(if_index == AVAHI_IF_UNSPEC){

631

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

632

" without a network interface\n");

707

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

708

" incomplete without a network interface\n");

633

709

errno = EINVAL;

634

710

goto mandos_end;

635

711

}

651

727

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

652

728

char interface[IF_NAMESIZE];

653

729

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

654

perror("if_indextoname");

730

perror_plus("if_indextoname");

655

731

} else {

656

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

657

ip, interface, port);

732

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

733

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

658

734

}

659

735

} else {

660

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

661

port);

736

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

737

ip, port);

662

738

}

663

739

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

664

740

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

671

747

sizeof(addrstr));

672

748

}

673

749

if(pcret == NULL){

674

perror("inet_ntop");

750

perror_plus("inet_ntop");

675

751

} else {

676

752

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

677

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

753

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

678

754

}

679

755

}

680

756

}

690

766

ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */

691

767

}

692

768

if(ret < 0){

693

int e = errno;

694

perror("connect");

695

errno = e;

769

if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){

770

int e = errno;

771

perror_plus("connect");

772

errno = e;

773

}

696

774

goto mandos_end;

697

775

}

698

776

706

784

while(true){

707

785

size_t out_size = strlen(out);

708

786

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

709

out_size - written));

787

out_size - written));

710

788

if(ret == -1){

711

789

int e = errno;

712

perror("write");

790

perror_plus("write");

713

791

errno = e;

714

792

goto mandos_end;

715

793

}

732

810

}

733

811

734

812

if(debug){

735

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

813

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

736

814

}

737

815

738

816

if(quit_now){

740

818

goto mandos_end;

741

819

}

742

820

821

/* Spurious warning from -Wint-to-pointer-cast */

743

822

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

744

823

745

824

if(quit_now){

757

836

758

837

if(ret != GNUTLS_E_SUCCESS){

759

838

if(debug){

760

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

839

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

761

840

gnutls_perror(ret);

762

841

}

763

842

errno = EPROTO;

767

846

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

768

847

769

848

if(debug){

770

fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",

771

ip);

849

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

850

" %s\n", ip);

772

851

}

773

852

774

853

while(true){

779

858

}

780

859

781

860

buffer_capacity = incbuffer(&buffer, buffer_length,

782

buffer_capacity);

861

buffer_capacity);

783

862

if(buffer_capacity == 0){

784

863

int e = errno;

785

perror("incbuffer");

864

perror_plus("incbuffer");

786

865

errno = e;

787

866

goto mandos_end;

788

867

}

812

891

}

813

892

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

814

893

if(ret < 0){

815

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

894

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

895

"***\n");

816

896

gnutls_perror(ret);

817

897

errno = EPROTO;

818

898

goto mandos_end;

819

899

}

820

900

break;

821

901

default:

822

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

823

" encrypted session with Mandos server\n");

902

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

903

" encrypted session with Mandos server\n");

824

904

gnutls_bye(session, GNUTLS_SHUT_RDWR);

825

905

errno = EIO;

826

906

goto mandos_end;

831

911

}

832

912

833

913

if(debug){

834

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

914

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

835

915

}

836

916

837

917

if(quit_now){

849

929

850

930

if(buffer_length > 0){

851

931

ssize_t decrypted_buffer_size;

852

decrypted_buffer_size = pgp_packet_decrypt(buffer,

853

buffer_length,

932

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

854

933

&decrypted_buffer);

855

934

if(decrypted_buffer_size >= 0){

856

935

867

946

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

868

947

int e = errno;

869

948

if(debug){

870

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

871

strerror(errno));

949

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

950

strerror(errno));

872

951

}

873

952

errno = e;

874

953

goto mandos_end;

893

972

if(e == 0){

894

973

e = errno;

895

974

}

896

perror("close");

975

perror_plus("close");

897

976

}

898

977

gnutls_deinit(session);

978

errno = e;

899

979

if(quit_now){

900

e = EINTR;

980

errno = EINTR;

901

981

retval = -1;

902

982

}

903

errno = e;

904

983

}

905

984

return retval;

906

985

}

931

1010

switch(event){

932

1011

default:

933

1012

case AVAHI_RESOLVER_FAILURE:

934

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

935

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

936

avahi_strerror(avahi_server_errno(mc.server)));

1013

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

1014

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

1015

domain,

1016

avahi_strerror(avahi_server_errno(mc.server)));

937

1017

break;

938

1018

939

1019

case AVAHI_RESOLVER_FOUND:

941

1021

char ip[AVAHI_ADDRESS_STR_MAX];

942

1022

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

943

1023

if(debug){

944

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

945

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

946

ip, (intmax_t)interface, port);

1024

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

1025

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

1026

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

947

1027

}

948

1028

int ret = start_mandos_communication(ip, port, interface,

949

1029

avahi_proto_to_af(proto));

950

1030

if(ret == 0){

951

1031

avahi_simple_poll_quit(mc.simple_poll);

1032

} else {

1033

if(not add_server(ip, port, interface,

1034

avahi_proto_to_af(proto))){

1035

fprintf_plus(stderr, "Failed to add server \"%s\" to server"

1036

" list\n", name);

1037

}

952

1038

}

953

1039

}

954

1040

}

978

1064

default:

979

1065

case AVAHI_BROWSER_FAILURE:

980

1066

981

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

982

avahi_strerror(avahi_server_errno(mc.server)));

1067

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

1068

avahi_strerror(avahi_server_errno(mc.server)));

983

1069

avahi_simple_poll_quit(mc.simple_poll);

984

1070

return;

985

1071

992

1078

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

993

1079

name, type, domain, protocol, 0,

994

1080

resolve_callback, NULL) == NULL)

995

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

996

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

1081

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

1082

" %s\n", name,

1083

avahi_strerror(avahi_server_errno(mc.server)));

997

1084

break;

998

1085

999

1086

case AVAHI_BROWSER_REMOVE:

1002

1089

case AVAHI_BROWSER_ALL_FOR_NOW:

1003

1090

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1004

1091

if(debug){

1005

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

1092

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

1093

" searching...\n");

1006

1094

}

1007

1095

break;

1008

1096

}

1009

1097

}

1010

1098

1011

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

1099

/* Signal handler that stops main loop after SIGTERM */

1012

1100

static void handle_sigterm(int sig){

1013

1101

if(quit_now){

1014

1102

return;

1016

1104

quit_now = 1;

1017

1105

signal_received = sig;

1018

1106

int old_errno = errno;

1107

/* set main loop to exit */

1019

1108

if(mc.simple_poll != NULL){

1020

1109

avahi_simple_poll_quit(mc.simple_poll);

1021

1110

}

1022

1111

errno = old_errno;

1023

1112

}

1024

1113

1025

/*

1026

* This function determines if a directory entry in /sys/class/net

1027

* corresponds to an acceptable network device.

1028

* (This function is passed to scandir(3) as a filter function.)

1029

*/

1030

int good_interface(const struct dirent *if_entry){

1031

ssize_t ssret;

1032

char *flagname = NULL;

1033

int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,

1034

if_entry->d_name);

1035

if(ret < 0){

1036

perror("asprintf");

1037

return 0;

1038

}

1039

if(if_entry->d_name[0] == '.'){

1040

return 0;

1041

}

1042

int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));

1043

if(flags_fd == -1){

1044

perror("open");

1045

return 0;

1046

}

1047

typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */

1048

/* read line from flags_fd */

1049

ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */

1050

char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */

1051

flagstring[(size_t)to_read] = '\0';

1052

if(flagstring == NULL){

1053

perror("malloc");

1054

close(flags_fd);

1055

return 0;

1056

}

1057

while(to_read > 0){

1058

ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,

1059

(size_t)to_read));

1060

if(ssret == -1){

1061

perror("read");

1062

free(flagstring);

1063

close(flags_fd);

1064

return 0;

1065

}

1066

to_read -= ssret;

1067

if(ssret == 0){

1068

break;

1069

}

1070

}

1071

close(flags_fd);

1072

intmax_t tmpmax;

1073

char *tmp;

1074

errno = 0;

1075

tmpmax = strtoimax(flagstring, &tmp, 0);

1076

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

1077

and not (isspace(*tmp)))

1078

or tmpmax != (ifreq_flags)tmpmax){

1114

bool get_flags(const char *ifname, struct ifreq *ifr){

1115

int ret;

1116

1117

int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1118

if(s < 0){

1119

perror_plus("socket");

1120

return false;

1121

}

1122

strcpy(ifr->ifr_name, ifname);

1123

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1124

if(ret == -1){

1079

1125

if(debug){

1080

fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",

1081

flagstring, if_entry->d_name);

1126

perror_plus("ioctl SIOCGIFFLAGS");

1082

1127

}

1083

free(flagstring);

1084

return 0;

1128

return false;

1085

1129

}

1086

free(flagstring);

1087

ifreq_flags flags = (ifreq_flags)tmpmax;

1130

return true;

1131

}

1132

1133

bool good_flags(const char *ifname, const struct ifreq *ifr){

1134

1088

1135

/* Reject the loopback device */

1089

if(flags & IFF_LOOPBACK){

1136

if(ifr->ifr_flags & IFF_LOOPBACK){

1090

1137

if(debug){

1091

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

1092

if_entry->d_name);

1138

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

1139

ifname);

1093

1140

}

1094

return 0;

1141

return false;

1095

1142

}

1096

1143

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

1097

if(connect_to != NULL and (flags & IFF_POINTOPOINT)){

1144

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

1098

1145

if(debug){

1099

fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",

1100

if_entry->d_name);

1146

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

1147

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

1101

1148

}

1102

return 1;

1149

return true;

1103

1150

}

1104

1151

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

1105

if(not (flags & IFF_BROADCAST)){

1106

if(debug){

1107

fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",

1108

if_entry->d_name);

1109

}

1110

return 0;

1111

}

1152

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

1153

if(debug){

1154

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1155

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

1156

}

1157

return false;

1158

}

1159

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

1160

if(ifr->ifr_flags & IFF_NOARP){

1161

if(debug){

1162

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

1163

ifname);

1164

}

1165

return false;

1166

}

1167

1112

1168

/* Accept this device */

1113

1169

if(debug){

1114

fprintf(stderr, "Interface \"%s\" is acceptable\n",

1115

if_entry->d_name);

1116

}

1117

return 1;

1170

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

1171

}

1172

return true;

1173

}

1174

1175

/*

1176

* This function determines if a directory entry in /sys/class/net

1177

* corresponds to an acceptable network device.

1178

* (This function is passed to scandir(3) as a filter function.)

1179

*/

1180

int good_interface(const struct dirent *if_entry){

1181

if(if_entry->d_name[0] == '.'){

1182

return 0;

1183

}

1184

1185

struct ifreq ifr;

1186

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

1187

if(debug){

1188

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

1189

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

1190

}

1191

return 0;

1192

}

1193

1194

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

1195

return 0;

1196

}

1197

return 1;

1198

}

1199

1200

/*

1201

* This function determines if a directory entry in /sys/class/net

1202

* corresponds to an acceptable network device which is up.

1203

* (This function is passed to scandir(3) as a filter function.)

1204

*/

1205

int up_interface(const struct dirent *if_entry){

1206

if(if_entry->d_name[0] == '.'){

1207

return 0;

1208

}

1209

1210

struct ifreq ifr;

1211

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

1212

if(debug){

1213

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

1214

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

1215

}

1216

return 0;

1217

}

1218

1219

/* Reject down interfaces */

1220

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

1221

if(debug){

1222

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

1223

if_entry->d_name);

1224

}

1225

return 0;

1226

}

1227

1228

/* Reject non-running interfaces */

1229

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

1230

if(debug){

1231

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

1232

if_entry->d_name);

1233

}

1234

return 0;

1235

}

1236

1237

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

1238

return 0;

1239

}

1240

return 1;

1241

}

1242

1243

int notdotentries(const struct dirent *direntry){

1244

/* Skip "." and ".." */

1245

if(direntry->d_name[0] == '.'

1246

and (direntry->d_name[1] == '\0'

1247

or (direntry->d_name[1] == '.'

1248

and direntry->d_name[2] == '\0'))){

1249

return 0;

1250

}

1251

return 1;

1252

}

1253

1254

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

1255

int runnable_hook(const struct dirent *direntry){

1256

int ret;

1257

size_t sret;

1258

struct stat st;

1259

1260

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

1261

/* Empty name? */

1262

return 0;

1263

}

1264

1265

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

1266

"abcdefghijklmnopqrstuvwxyz"

1267

"0123456789"

1268

"_-");

1269

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

1270

/* Contains non-allowed characters */

1271

if(debug){

1272

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

1273

direntry->d_name);

1274

}

1275

return 0;

1276

}

1277

1278

char *fullname = NULL;

1279

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

1280

if(ret < 0){

1281

perror_plus("asprintf");

1282

return 0;

1283

}

1284

1285

ret = stat(fullname, &st);

1286

if(ret == -1){

1287

if(debug){

1288

perror_plus("Could not stat hook");

1289

}

1290

return 0;

1291

}

1292

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

1293

/* Not a regular file */

1294

if(debug){

1295

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

1296

direntry->d_name);

1297

}

1298

return 0;

1299

}

1300

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

1301

/* Not executable */

1302

if(debug){

1303

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

1304

direntry->d_name);

1305

}

1306

return 0;

1307

}

1308

if(debug){

1309

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

1310

direntry->d_name);

1311

}

1312

return 1;

1313

}

1314

1315

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1316

int ret;

1317

struct timespec now;

1318

struct timespec waited_time;

1319

intmax_t block_time;

1320

1321

while(true){

1322

if(mc.current_server == NULL){

1323

if (debug){

1324

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

1325

" No timeout!\n");

1326

}

1327

ret = avahi_simple_poll_iterate(s, -1);

1328

} else {

1329

if (debug){

1330

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

1331

" it, or wait\n");

1332

}

1333

/* the current time */

1334

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1335

if(ret == -1){

1336

perror_plus("clock_gettime");

1337

return -1;

1338

}

1339

/* Calculating in ms how long time between now and server

1340

who we visted longest time ago. Now - last seen. */

1341

waited_time.tv_sec = (now.tv_sec

1342

- mc.current_server->last_seen.tv_sec);

1343

waited_time.tv_nsec = (now.tv_nsec

1344

- mc.current_server->last_seen.tv_nsec);

1345

/* total time is 10s/10,000ms.

1346

Converting to s from ms by dividing by 1,000,

1347

and ns to ms by dividing by 1,000,000. */

1348

block_time = ((retry_interval

1349

- ((intmax_t)waited_time.tv_sec * 1000))

1350

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

1351

1352

if (debug){

1353

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

1354

block_time);

1355

}

1356

1357

if(block_time <= 0){

1358

ret = start_mandos_communication(mc.current_server->ip,

1359

mc.current_server->port,

1360

mc.current_server->if_index,

1361

mc.current_server->af);

1362

if(ret == 0){

1363

avahi_simple_poll_quit(mc.simple_poll);

1364

return 0;

1365

}

1366

ret = clock_gettime(CLOCK_MONOTONIC,

1367

&mc.current_server->last_seen);

1368

if(ret == -1){

1369

perror_plus("clock_gettime");

1370

return -1;

1371

}

1372

mc.current_server = mc.current_server->next;

1373

block_time = 0; /* Call avahi to find new Mandos

1374

servers, but don't block */

1375

}

1376

1377

ret = avahi_simple_poll_iterate(s, (int)block_time);

1378

}

1379

if(ret != 0){

1380

if (ret > 0 or errno != EINTR){

1381

return (ret != 1) ? ret : 0;

1382

}

1383

}

1384

}

1385

}

1386

1387

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

1388

const float delay){

1389

struct dirent **direntries;

1390

struct dirent *direntry;

1391

int ret;

1392

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

1393

alphasort);

1394

if(numhooks == -1){

1395

perror_plus("scandir");

1396

} else {

1397

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

1398

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

1399

direntry = direntries[i];

1400

char *fullname = NULL;

1401

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

1402

if(ret < 0){

1403

perror_plus("asprintf");

1404

continue;

1405

}

1406

if(debug){

1407

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

1408

direntry->d_name);

1409

}

1410

pid_t hook_pid = fork();

1411

if(hook_pid == 0){

1412

/* Child */

1413

/* Raise privileges */

1414

errno = 0;

1415

ret = seteuid(0);

1416

if(ret == -1){

1417

perror_plus("seteuid");

1418

}

1419

/* Raise privileges even more */

1420

errno = 0;

1421

ret = setuid(0);

1422

if(ret == -1){

1423

perror_plus("setuid");

1424

}

1425

/* Set group */

1426

errno = 0;

1427

ret = setgid(0);

1428

if(ret == -1){

1429

perror_plus("setgid");

1430

}

1431

/* Reset supplementary groups */

1432

errno = 0;

1433

ret = setgroups(0, NULL);

1434

if(ret == -1){

1435

perror_plus("setgroups");

1436

}

1437

dup2(devnull, STDIN_FILENO);

1438

close(devnull);

1439

dup2(STDERR_FILENO, STDOUT_FILENO);

1440

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

1441

if(ret == -1){

1442

perror_plus("setenv");

1443

_exit(EX_OSERR);

1444

}

1445

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

1446

if(ret == -1){

1447

perror_plus("setenv");

1448

_exit(EX_OSERR);

1449

}

1450

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

1451

if(ret == -1){

1452

perror_plus("setenv");

1453

_exit(EX_OSERR);

1454

}

1455

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

1456

if(ret == -1){

1457

perror_plus("setenv");

1458

_exit(EX_OSERR);

1459

}

1460

char *delaystring;

1461

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

1462

if(ret == -1){

1463

perror_plus("asprintf");

1464

_exit(EX_OSERR);

1465

}

1466

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

1467

if(ret == -1){

1468

free(delaystring);

1469

perror_plus("setenv");

1470

_exit(EX_OSERR);

1471

}

1472

free(delaystring);

1473

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

1474

perror_plus("execl");

1475

} else {

1476

int status;

1477

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

1478

perror_plus("waitpid");

1479

free(fullname);

1480

continue;

1481

}

1482

if(WIFEXITED(status)){

1483

if(WEXITSTATUS(status) != 0){

1484

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

1485

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

1486

WEXITSTATUS(status));

1487

free(fullname);

1488

continue;

1489

}

1490

} else if(WIFSIGNALED(status)){

1491

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

1492

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

1493

WTERMSIG(status));

1494

free(fullname);

1495

continue;

1496

} else {

1497

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

1498

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

1499

free(fullname);

1500

continue;

1501

}

1502

}

1503

free(fullname);

1504

if(debug){

1505

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

1506

direntry->d_name);

1507

}

1508

}

1509

close(devnull);

1510

}

1511

return true;

1118

1512

}

1119

1513

1120

1514

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

1139

1533

bool gnutls_initialized = false;

1140

1534

bool gpgme_initialized = false;

1141

1535

float delay = 2.5f;

1536

double retry_interval = 10; /* 10s between trying a server and

1537

retrying the same server again */

1142

1538

1143

1539

struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };

1144

1540

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

1150

1546

errno = 0;

1151

1547

ret = setgid(gid);

1152

1548

if(ret == -1){

1153

perror("setgid");

1549

perror_plus("setgid");

1154

1550

}

1155

1551

1156

1552

/* Lower user privileges (temporarily) */

1157

1553

errno = 0;

1158

1554

ret = seteuid(uid);

1159

1555

if(ret == -1){

1160

perror("seteuid");

1556

perror_plus("seteuid");

1161

1557

}

1162

1558

1163

1559

if(quit_now){

1198

1594

.arg = "SECONDS",

1199

1595

.doc = "Maximum delay to wait for interface startup",

1200

1596

.group = 2 },

1597

{ .name = "retry", .key = 132,

1598

.arg = "SECONDS",

1599

.doc = "Retry interval used when denied by the mandos server",

1600

.group = 2 },

1601

{ .name = "network-hook-dir", .key = 133,

1602

.arg = "DIR",

1603

.doc = "Directory where network hooks are located",

1604

.group = 2 },

1201

1605

/*

1202

1606

* These reproduce what we would get without ARGP_NO_HELP

1203

1607

*/

1247

1651

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

1248

1652

argp_error(state, "Bad delay");

1249

1653

}

1654

case 132: /* --retry */

1655

errno = 0;

1656

retry_interval = strtod(arg, &tmp);

1657

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

1658

or (retry_interval * 1000) > INT_MAX

1659

or retry_interval < 0){

1660

argp_error(state, "Bad retry interval");

1661

}

1662

break;

1663

case 133: /* --network-hook-dir */

1664

hookdir = arg;

1250

1665

break;

1251

1666

/*

1252

1667

* These reproduce what we would get without ARGP_NO_HELP

1259

1674

argp_state_help(state, state->out_stream,

1260

1675

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1261

1676

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

1262

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

1677

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

1263

1678

exit(argp_err_exit_status);

1264

1679

break;

1265

1680

default:

1280

1695

case ENOMEM:

1281

1696

default:

1282

1697

errno = ret;

1283

perror("argp_parse");

1698

perror_plus("argp_parse");

1284

1699

exitcode = EX_OSERR;

1285

1700

goto end;

1286

1701

case EINVAL:

1288

1703

goto end;

1289

1704

}

1290

1705

}

1706

1707

{

1708

/* Work around Debian bug #633582:

1709

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

1710

1711

/* Re-raise priviliges */

1712

errno = 0;

1713

ret = seteuid(0);

1714

if(ret == -1){

1715

perror_plus("seteuid");

1716

} else {

1717

struct stat st;

1718

1719

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

1720

int seckey_fd = open(seckey, O_RDONLY);

1721

if(seckey_fd == -1){

1722

perror_plus("open");

1723

} else {

1724

ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));

1725

if(ret == -1){

1726

perror_plus("fstat");

1727

} else {

1728

if(S_ISREG(st.st_mode)

1729

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

1730

ret = fchown(seckey_fd, uid, gid);

1731

if(ret == -1){

1732

perror_plus("fchown");

1733

}

1734

}

1735

}

1736

TEMP_FAILURE_RETRY(close(seckey_fd));

1737

}

1738

}

1739

1740

if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){

1741

int pubkey_fd = open(pubkey, O_RDONLY);

1742

if(pubkey_fd == -1){

1743

perror_plus("open");

1744

} else {

1745

ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));

1746

if(ret == -1){

1747

perror_plus("fstat");

1748

} else {

1749

if(S_ISREG(st.st_mode)

1750

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

1751

ret = fchown(pubkey_fd, uid, gid);

1752

if(ret == -1){

1753

perror_plus("fchown");

1754

}

1755

}

1756

}

1757

TEMP_FAILURE_RETRY(close(pubkey_fd));

1758

}

1759

}

1760

1761

/* Lower privileges */

1762

errno = 0;

1763

ret = seteuid(uid);

1764

if(ret == -1){

1765

perror_plus("seteuid");

1766

}

1767

}

1768

}

1769

1770

/* Run network hooks */

1771

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

1772

goto end;

1773

}

1291

1774

1292

1775

if(not debug){

1293

1776

avahi_set_log_function(empty_log);

1294

1777

}

1295

1778

1296

1779

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

1297

1780

struct dirent **direntries;

1298

ret = scandir(sys_class_net, &direntries, good_interface,

1781

/* First look for interfaces that are up */

1782

ret = scandir(sys_class_net, &direntries, up_interface,

1299

1783

alphasort);

1784

if(ret == 0){

1785

/* No up interfaces, look for any good interfaces */

1786

free(direntries);

1787

ret = scandir(sys_class_net, &direntries, good_interface,

1788

alphasort);

1789

}

1300

1790

if(ret >= 1){

1301

/* Pick the first good interface */

1791

/* Pick the first interface returned */

1302

1792

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

1303

1793

if(debug){

1304

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

1794

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

1305

1795

}

1306

1796

if(interface == NULL){

1307

perror("malloc");

1797

perror_plus("malloc");

1308

1798

free(direntries);

1309

1799

exitcode = EXIT_FAILURE;

1310

1800

goto end;

1312

1802

free(direntries);

1313

1803

} else {

1314

1804

free(direntries);

1315

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

1805

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

1316

1806

exitcode = EXIT_FAILURE;

1317

1807

goto end;

1318

1808

}

1324

1814

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

1325

1815

mc.simple_poll = avahi_simple_poll_new();

1326

1816

if(mc.simple_poll == NULL){

1327

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

1817

fprintf_plus(stderr,

1818

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

1328

1819

exitcode = EX_UNAVAILABLE;

1329

1820

goto end;

1330

1821

}

1332

1823

sigemptyset(&sigterm_action.sa_mask);

1333

1824

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

1334

1825

if(ret == -1){

1335

perror("sigaddset");

1826

perror_plus("sigaddset");

1336

1827

exitcode = EX_OSERR;

1337

1828

goto end;

1338

1829

}

1339

1830

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

1340

1831

if(ret == -1){

1341

perror("sigaddset");

1832

perror_plus("sigaddset");

1342

1833

exitcode = EX_OSERR;

1343

1834

goto end;

1344

1835

}

1345

1836

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

1346

1837

if(ret == -1){

1347

perror("sigaddset");

1838

perror_plus("sigaddset");

1348

1839

exitcode = EX_OSERR;

1349

1840

goto end;

1350

1841

}

1354

1845

*/

1355

1846

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

1356

1847

if(ret == -1){

1357

perror("sigaction");

1848

perror_plus("sigaction");

1358

1849

return EX_OSERR;

1359

1850

}

1360

1851

if(old_sigterm_action.sa_handler != SIG_IGN){

1361

1852

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

1362

1853

if(ret == -1){

1363

perror("sigaction");

1854

perror_plus("sigaction");

1364

1855

exitcode = EX_OSERR;

1365

1856

goto end;

1366

1857

}

1367

1858

}

1368

1859

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

1369

1860

if(ret == -1){

1370

perror("sigaction");

1861

perror_plus("sigaction");

1371

1862

return EX_OSERR;

1372

1863

}

1373

1864

if(old_sigterm_action.sa_handler != SIG_IGN){

1374

1865

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

1375

1866

if(ret == -1){

1376

perror("sigaction");

1867

perror_plus("sigaction");

1377

1868

exitcode = EX_OSERR;

1378

1869

goto end;

1379

1870

}

1380

1871

}

1381

1872

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

1382

1873

if(ret == -1){

1383

perror("sigaction");

1874

perror_plus("sigaction");

1384

1875

return EX_OSERR;

1385

1876

}

1386

1877

if(old_sigterm_action.sa_handler != SIG_IGN){

1387

1878

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

1388

1879

if(ret == -1){

1389

perror("sigaction");

1880

perror_plus("sigaction");

1390

1881

exitcode = EX_OSERR;

1391

1882

goto end;

1392

1883

}

1396

1887

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

1397

1888

if_index = (AvahiIfIndex) if_nametoindex(interface);

1398

1889

if(if_index == 0){

1399

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

1890

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

1400

1891

exitcode = EX_UNAVAILABLE;

1401

1892

goto end;

1402

1893

}

1409

1900

errno = 0;

1410

1901

ret = seteuid(0);

1411

1902

if(ret == -1){

1412

perror("seteuid");

1903

perror_plus("seteuid");

1413

1904

}

1414

1905

1415

1906

#ifdef __linux__

1419

1910

bool restore_loglevel = true;

1420

1911

if(ret == -1){

1421

1912

restore_loglevel = false;

1422

perror("klogctl");

1913

perror_plus("klogctl");

1423

1914

}

1424

1915

#endif /* __linux__ */

1425

1916

1426

1917

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1427

1918

if(sd < 0){

1428

perror("socket");

1919

perror_plus("socket");

1429

1920

exitcode = EX_OSERR;

1430

1921

#ifdef __linux__

1431

1922

if(restore_loglevel){

1432

1923

ret = klogctl(7, NULL, 0);

1433

1924

if(ret == -1){

1434

perror("klogctl");

1925

perror_plus("klogctl");

1435

1926

}

1436

1927

}

1437

1928

#endif /* __linux__ */

1439

1930

errno = 0;

1440

1931

ret = seteuid(uid);

1441

1932

if(ret == -1){

1442

perror("seteuid");

1933

perror_plus("seteuid");

1443

1934

}

1444

1935

goto end;

1445

1936

}

1446

1937

strcpy(network.ifr_name, interface);

1447

1938

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

1448

1939

if(ret == -1){

1449

perror("ioctl SIOCGIFFLAGS");

1940

perror_plus("ioctl SIOCGIFFLAGS");

1450

1941

#ifdef __linux__

1451

1942

if(restore_loglevel){

1452

1943

ret = klogctl(7, NULL, 0);

1453

1944

if(ret == -1){

1454

perror("klogctl");

1945

perror_plus("klogctl");

1455

1946

}

1456

1947

}

1457

1948

#endif /* __linux__ */

1460

1951

errno = 0;

1461

1952

ret = seteuid(uid);

1462

1953

if(ret == -1){

1463

perror("seteuid");

1954

perror_plus("seteuid");

1464

1955

}

1465

1956

goto end;

1466

1957

}

1470

1961

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

1471

1962

if(ret == -1){

1472

1963

take_down_interface = false;

1473

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1964

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1474

1965

exitcode = EX_OSERR;

1475

1966

#ifdef __linux__

1476

1967

if(restore_loglevel){

1477

1968

ret = klogctl(7, NULL, 0);

1478

1969

if(ret == -1){

1479

perror("klogctl");

1970

perror_plus("klogctl");

1480

1971

}

1481

1972

}

1482

1973

#endif /* __linux__ */

1484

1975

errno = 0;

1485

1976

ret = seteuid(uid);

1486

1977

if(ret == -1){

1487

perror("seteuid");

1978

perror_plus("seteuid");

1488

1979

}

1489

1980

goto end;

1490

1981

}

1491

1982

}

1492

/* sleep checking until interface is running */

1983

/* Sleep checking until interface is running.

1984

Check every 0.25s, up to total time of delay */

1493

1985

for(int i=0; i < delay * 4; i++){

1494

1986

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

1495

1987

if(ret == -1){

1496

perror("ioctl SIOCGIFFLAGS");

1988

perror_plus("ioctl SIOCGIFFLAGS");

1497

1989

} else if(network.ifr_flags & IFF_RUNNING){

1498

1990

break;

1499

1991

}

1500

1992

struct timespec sleeptime = { .tv_nsec = 250000000 };

1501

1993

ret = nanosleep(&sleeptime, NULL);

1502

1994

if(ret == -1 and errno != EINTR){

1503

perror("nanosleep");

1995

perror_plus("nanosleep");

1504

1996

}

1505

1997

}

1506

1998

if(not take_down_interface){

1507

1999

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

1508

2000

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

1509

2001

if(ret == -1){

1510

perror("close");

2002

perror_plus("close");

1511

2003

}

1512

2004

}

1513

2005

#ifdef __linux__

1515

2007

/* Restores kernel loglevel to default */

1516

2008

ret = klogctl(7, NULL, 0);

1517

2009

if(ret == -1){

1518

perror("klogctl");

2010

perror_plus("klogctl");

1519

2011

}

1520

2012

}

1521

2013

#endif /* __linux__ */

1522

2014

/* Lower privileges */

1523

2015

errno = 0;

1524

if(take_down_interface){

1525

/* Lower privileges */

1526

ret = seteuid(uid);

1527

if(ret == -1){

1528

perror("seteuid");

1529

}

1530

} else {

1531

/* Lower privileges permanently */

1532

ret = setuid(uid);

1533

if(ret == -1){

1534

perror("setuid");

1535

}

2016

/* Lower privileges */

2017

ret = seteuid(uid);

2018

if(ret == -1){

2019

perror_plus("seteuid");

1536

2020

}

1537

2021

}

1538

2022

1542

2026

1543

2027

ret = init_gnutls_global(pubkey, seckey);

1544

2028

if(ret == -1){

1545

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

2029

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

1546

2030

exitcode = EX_UNAVAILABLE;

1547

2031

goto end;

1548

2032

} else {

1553

2037

goto end;

1554

2038

}

1555

2039

2040

if(mkdtemp(tempdir) == NULL){

2041

perror_plus("mkdtemp");

2042

goto end;

2043

}

1556

2044

tempdir_created = true;

1557

if(mkdtemp(tempdir) == NULL){

1558

tempdir_created = false;

1559

perror("mkdtemp");

1560

goto end;

1561

}

1562

2045

1563

2046

if(quit_now){

1564

2047

goto end;

1565

2048

}

1566

2049

1567

2050

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

1568

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

2051

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

1569

2052

exitcode = EX_UNAVAILABLE;

1570

2053

goto end;

1571

2054

} else {

1581

2064

/* (Mainly meant for debugging) */

1582

2065

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

1583

2066

if(address == NULL){

1584

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

2067

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

1585

2068

exitcode = EX_USAGE;

1586

2069

goto end;

1587

2070

}

1595

2078

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

1596

2079

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

1597

2080

or tmpmax != (uint16_t)tmpmax){

1598

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

2081

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

1599

2082

exitcode = EX_USAGE;

1600

2083

goto end;

1601

2084

}

1606

2089

1607

2090

port = (uint16_t)tmpmax;

1608

2091

*address = '\0';

1609

address = connect_to;

1610

2092

/* Colon in address indicates IPv6 */

1611

2093

int af;

1612

if(strchr(address, ':') != NULL){

2094

if(strchr(connect_to, ':') != NULL){

1613

2095

af = AF_INET6;

2096

/* Accept [] around IPv6 address - see RFC 5952 */

2097

if(connect_to[0] == '[' and address[-1] == ']')

2098

{

2099

connect_to++;

2100

address[-1] = '\0';

2101

}

1614

2102

} else {

1615

2103

af = AF_INET;

1616

2104

}

2105

address = connect_to;

1617

2106

1618

2107

if(quit_now){

1619

2108

goto end;

1620

2109

}

1621

2110

1622

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

1623

if(ret < 0){

1624

switch(errno){

1625

case ENETUNREACH:

1626

case EHOSTDOWN:

1627

case EHOSTUNREACH:

1628

exitcode = EX_NOHOST;

1629

break;

1630

case EINVAL:

1631

exitcode = EX_USAGE;

1632

break;

1633

case EIO:

1634

exitcode = EX_IOERR;

1635

break;

1636

case EPROTO:

1637

exitcode = EX_PROTOCOL;

1638

break;

1639

default:

1640

exitcode = EX_OSERR;

1641

break;

1642

}

1643

} else {

2111

while(not quit_now){

2112

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

2113

if(quit_now or ret == 0){

2114

break;

2115

}

2116

if(debug){

2117

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

2118

(int)retry_interval);

2119

}

2120

sleep((int)retry_interval);

2121

}

2122

2123

if (not quit_now){

1644

2124

exitcode = EXIT_SUCCESS;

1645

2125

}

2126

1646

2127

goto end;

1647

2128

}

1648

2129

1670

2151

1671

2152

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

1672

2153

if(mc.server == NULL){

1673

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

1674

avahi_strerror(error));

2154

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

2155

avahi_strerror(error));

1675

2156

exitcode = EX_UNAVAILABLE;

1676

2157

goto end;

1677

2158

}

1685

2166

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1686

2167

NULL, 0, browse_callback, NULL);

1687

2168

if(sb == NULL){

1688

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

1689

avahi_strerror(avahi_server_errno(mc.server)));

2169

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

2170

avahi_strerror(avahi_server_errno(mc.server)));

1690

2171

exitcode = EX_UNAVAILABLE;

1691

2172

goto end;

1692

2173

}

1698

2179

/* Run the main loop */

1699

2180

1700

2181

if(debug){

1701

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

1702

}

1703

1704

avahi_simple_poll_loop(mc.simple_poll);

2182

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

2183

}

2184

2185

ret = avahi_loop_with_timeout(mc.simple_poll,

2186

(int)(retry_interval * 1000));

2187

if(debug){

2188

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

2189

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

2190

}

1705

2191

1706

2192

end:

1707

2193

1708

2194

if(debug){

1709

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

2195

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

1710

2196

}

1711

2197

1712

2198

/* Cleanup things */

1729

2215

gpgme_release(mc.ctx);

1730

2216

}

1731

2217

1732

/* Take down the network interface */

1733

if(take_down_interface){

1734

/* Re-raise priviliges */

2218

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

2219

has seen */

2220

if(mc.current_server != NULL){

2221

mc.current_server->prev->next = NULL;

2222

while(mc.current_server != NULL){

2223

server *next = mc.current_server->next;

2224

free(mc.current_server);

2225

mc.current_server = next;

2226

}

2227

}

2228

2229

/* Run network hooks */

2230

run_network_hooks("stop", interface, delay);

2231

2232

/* Re-raise priviliges */

2233

{

1735

2234

errno = 0;

1736

2235

ret = seteuid(0);

1737

2236

if(ret == -1){

1738

perror("seteuid");

2237

perror_plus("seteuid");

1739

2238

}

1740

if(geteuid() == 0){

2239

2240

/* Take down the network interface */

2241

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

1741

2242

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

1742

2243

if(ret == -1){

1743

perror("ioctl SIOCGIFFLAGS");

1744

} else if(network.ifr_flags & IFF_UP) {

2244

perror_plus("ioctl SIOCGIFFLAGS");

2245

} else if(network.ifr_flags & IFF_UP){

1745

2246

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

1746

2247

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

1747

2248

if(ret == -1){

1748

perror("ioctl SIOCSIFFLAGS -IFF_UP");

2249

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1749

2250

}

1750

2251

}

1751

2252

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

1752

2253

if(ret == -1){

1753

perror("close");

1754

}

1755

/* Lower privileges permanently */

1756

errno = 0;

1757

ret = setuid(uid);

1758

if(ret == -1){

1759

perror("setuid");

2254

perror_plus("close");

1760

2255

}

1761

2256

}

1762

2257

}

2258

/* Lower privileges permanently */

2259

errno = 0;

2260

ret = setuid(uid);

2261

if(ret == -1){

2262

perror_plus("setuid");

2263

}

1763

2264

1764

/* Removes the temp directory used by GPGME */

2265

/* Removes the GPGME temp directory and all files inside */

1765

2266

if(tempdir_created){

1766

DIR *d;

1767

struct dirent *direntry;

1768

d = opendir(tempdir);

1769

if(d == NULL){

1770

if(errno != ENOENT){

1771

perror("opendir");

1772

}

1773

} else {

1774

while(true){

1775

direntry = readdir(d);

1776

if(direntry == NULL){

1777

break;

1778

}

1779

/* Skip "." and ".." */

1780

if(direntry->d_name[0] == '.'

1781

and (direntry->d_name[1] == '\0'

1782

or (direntry->d_name[1] == '.'

1783

and direntry->d_name[2] == '\0'))){

1784

continue;

1785

}

2267

struct dirent **direntries = NULL;

2268

struct dirent *direntry = NULL;

2269

int numentries = scandir(tempdir, &direntries, notdotentries,

2270

alphasort);

2271

if (numentries > 0){

2272

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

2273

direntry = direntries[i];

1786

2274

char *fullname = NULL;

1787

2275

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

1788

2276

direntry->d_name);

1789

2277

if(ret < 0){

1790

perror("asprintf");

2278

perror_plus("asprintf");

1791

2279

continue;

1792

2280

}

1793

2281

ret = remove(fullname);

1794

2282

if(ret == -1){

1795

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

1796

strerror(errno));

2283

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

2284

strerror(errno));

1797

2285

}

1798

2286

free(fullname);

1799

2287

}

1800

closedir(d);

2288

}

2289

2290

/* need to clean even if 0 because man page doesn't specify */

2291

free(direntries);

2292

if (numentries == -1){

2293

perror_plus("scandir");

1801

2294

}

1802

2295

ret = rmdir(tempdir);

1803

2296

if(ret == -1 and errno != ENOENT){

1804

perror("rmdir");

2297

perror_plus("rmdir");

1805

2298

}

1806

2299

}

1807

2300

1812

2305

&old_sigterm_action,

1813

2306

NULL));

1814

2307

if(ret == -1){

1815

perror("sigaction");

2308

perror_plus("sigaction");

1816

2309

}

1817

2310

do {

1818

2311

ret = raise(signal_received);

1819

2312

} while(ret != 0 and errno == EINTR);

1820

2313

if(ret != 0){

1821

perror("raise");

2314

perror_plus("raise");

1822

2315

abort();

1823

2316

}

1824

2317

TEMP_FAILURE_RETRY(pause());