/mandos/trunk : revision 177

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

35

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

36

37

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

38

ferror() */

37

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

38

stdout, ferror() */

39

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

40

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

41

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

42

srand() */

43

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

44

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

45

strerror(), memcpy(), strcpy() */

45

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

46

#include <sys/ioctl.h> /* ioctl */

47

#include <sys/types.h> /* socket(), inet_pton(), sockaddr,

48

sockaddr_in6, PF_INET6,

49

SOCK_STREAM, INET6_ADDRSTRLEN,

50

uid_t, gid_t */

51

#include <inttypes.h> /* PRIu16 */

50

uid_t, gid_t, open(), opendir(), DIR */

51

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

52

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

53

struct in6_addr, inet_pton(),

54

connect() */

55

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

56

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

57

#include <inttypes.h> /* PRIu16 */

55

58

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

56

59

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

57

60

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

58

61

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

59

62

SIOCSIFFLAGS, if_indextoname(),

60

63

if_nametoindex(), IF_NAMESIZE */

64

#include <netinet/in.h>

61

65

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

62

66

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

63

67

setgid() */

64

#include <netinet/in.h>

65

68

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

66

69

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

67

70

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

81

84

#include <avahi-common/error.h>

82

85

83

86

/* GnuTLS */

84

#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions

87

#include <gnutls/gnutls.h> /* All GnuTLS types, constants and

88

functions:

85

89

gnutls_*

86

90

init_gnutls_session(),

87

91

GNUTLS_* */

89

93

GNUTLS_OPENPGP_FMT_BASE64 */

90

94

91

95

/* GPGME */

92

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

96

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

97

functions:

93

98

gpgme_*

94

99

GPGME_PROTOCOL_OpenPGP,

95

100

GPG_ERR_NO_* */

96

101

97

102

#define BUFFER_SIZE 256

98

103

104

/*

105

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

106

*/

107

108

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

109

#define SECKEY "seckey.txt"

110

#define PUBKEY "pubkey.txt"

111

99

112

bool debug = false;

100

static const char *keydir = "/conf/conf.d/mandos";

101

113

static const char mandos_protocol_version[] = "1";

102

const char *argp_program_version = "password-request 1.0";

114

const char *argp_program_version = "mandos-client 1.0";

103

115

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

104

116

105

117

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

110

122

unsigned int dh_bits;

111

123

gnutls_dh_params_t dh_params;

112

124

const char *priority;

125

gpgme_ctx_t ctx;

113

126

} mandos_context;

114

127

115

128

/*

130

143

}

131

144

132

145

/*

133

* Decrypt OpenPGP data using keyrings in HOMEDIR.

134

* Returns -1 on error

146

* Initialize GPGME.

135

147

*/

136

static ssize_t pgp_packet_decrypt (const char *cryptotext,

137

size_t crypto_size,

138

char **plaintext,

139

const char *homedir){

140

gpgme_data_t dh_crypto, dh_plain;

141

gpgme_ctx_t ctx;

148

static bool init_gpgme(mandos_context *mc, const char *seckey,

149

const char *pubkey, const char *tempdir){

150

int ret;

142

151

gpgme_error_t rc;

143

ssize_t ret;

144

size_t plaintext_capacity = 0;

145

ssize_t plaintext_length = 0;

146

152

gpgme_engine_info_t engine_info;

147

153

154

155

/*

156

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

157

*/

158

bool import_key(const char *filename){

159

int fd;

160

gpgme_data_t pgp_data;

161

162

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

163

if(fd == -1){

164

perror("open");

165

return false;

166

}

167

168

rc = gpgme_data_new_from_fd(&pgp_data, fd);

169

if (rc != GPG_ERR_NO_ERROR){

170

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

171

gpgme_strsource(rc), gpgme_strerror(rc));

172

return false;

173

}

174

175

rc = gpgme_op_import(mc->ctx, pgp_data);

176

if (rc != GPG_ERR_NO_ERROR){

177

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

178

gpgme_strsource(rc), gpgme_strerror(rc));

179

return false;

180

}

181

182

ret = TEMP_FAILURE_RETRY(close(fd));

183

if(ret == -1){

184

perror("close");

185

}

186

gpgme_data_release(pgp_data);

187

return true;

188

}

189

148

190

if (debug){

149

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

191

fprintf(stderr, "Initialize gpgme\n");

150

192

}

151

193

152

194

/* Init GPGME */

155

197

if (rc != GPG_ERR_NO_ERROR){

156

198

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

157

199

gpgme_strsource(rc), gpgme_strerror(rc));

158

return -1;

200

return false;

159

201

}

160

202

161

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

203

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

162

204

rc = gpgme_get_engine_info (&engine_info);

163

205

if (rc != GPG_ERR_NO_ERROR){

164

206

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

165

207

gpgme_strsource(rc), gpgme_strerror(rc));

166

return -1;

208

return false;

167

209

}

168

210

while(engine_info != NULL){

169

211

if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){

170

212

gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,

171

engine_info->file_name, homedir);

213

engine_info->file_name, tempdir);

172

214

break;

173

215

}

174

216

engine_info = engine_info->next;

175

217

}

176

218

if(engine_info == NULL){

177

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

178

return -1;

219

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

220

return false;

221

}

222

223

/* Create new GPGME "context" */

224

rc = gpgme_new(&(mc->ctx));

225

if (rc != GPG_ERR_NO_ERROR){

226

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

227

gpgme_strsource(rc), gpgme_strerror(rc));

228

return false;

229

}

230

231

if (not import_key(pubkey) or not import_key(seckey)){

232

return false;

233

}

234

235

return true;

236

}

237

238

/*

239

* Decrypt OpenPGP data.

240

* Returns -1 on error

241

*/

242

static ssize_t pgp_packet_decrypt (const mandos_context *mc,

243

const char *cryptotext,

244

size_t crypto_size,

245

char **plaintext){

246

gpgme_data_t dh_crypto, dh_plain;

247

gpgme_error_t rc;

248

ssize_t ret;

249

size_t plaintext_capacity = 0;

250

ssize_t plaintext_length = 0;

251

252

if (debug){

253

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

179

254

}

180

255

181

256

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

196

271

return -1;

197

272

}

198

273

199

/* Create new GPGME "context" */

200

rc = gpgme_new(&ctx);

201

if (rc != GPG_ERR_NO_ERROR){

202

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

203

gpgme_strsource(rc), gpgme_strerror(rc));

204

plaintext_length = -1;

205

goto decrypt_end;

206

}

207

208

274

/* Decrypt data from the cryptotext data buffer to the plaintext

209

275

data buffer */

210

rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);

276

rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);

211

277

if (rc != GPG_ERR_NO_ERROR){

212

278

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

213

279

gpgme_strsource(rc), gpgme_strerror(rc));

214

280

plaintext_length = -1;

281

if (debug){

282

gpgme_decrypt_result_t result;

283

result = gpgme_op_decrypt_result(mc->ctx);

284

if (result == NULL){

285

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

286

} else {

287

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

288

result->unsupported_algorithm);

289

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

290

result->wrong_key_usage);

291

if(result->file_name != NULL){

292

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

293

}

294

gpgme_recipient_t recipient;

295

recipient = result->recipients;

296

if(recipient){

297

while(recipient != NULL){

298

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

299

gpgme_pubkey_algo_name(recipient->pubkey_algo));

300

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

301

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

302

recipient->status == GPG_ERR_NO_SECKEY

303

? "No" : "Yes");

304

recipient = recipient->next;

305

}

306

}

307

}

308

}

215

309

goto decrypt_end;

216

310

}

217

311

219

313

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

220

314

}

221

315

222

if (debug){

223

gpgme_decrypt_result_t result;

224

result = gpgme_op_decrypt_result(ctx);

225

if (result == NULL){

226

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

227

} else {

228

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

229

result->unsupported_algorithm);

230

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

231

result->wrong_key_usage);

232

if(result->file_name != NULL){

233

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

234

}

235

gpgme_recipient_t recipient;

236

recipient = result->recipients;

237

if(recipient){

238

while(recipient != NULL){

239

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

240

gpgme_pubkey_algo_name(recipient->pubkey_algo));

241

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

242

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

243

recipient->status == GPG_ERR_NO_SECKEY

244

? "No" : "Yes");

245

recipient = recipient->next;

246

}

247

}

248

}

249

}

250

251

316

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

252

317

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

253

perror("pgpme_data_seek");

318

perror("gpgme_data_seek");

254

319

plaintext_length = -1;

255

320

goto decrypt_end;

256

321

}

280

345

}

281

346

plaintext_length += ret;

282

347

}

283

348

284

349

if(debug){

285

350

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

286

351

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

300

365

}

301

366

302

367

static const char * safer_gnutls_strerror (int value) {

303

const char *ret = gnutls_strerror (value);

368

const char *ret = gnutls_strerror (value); /* Spurious warning */

304

369

if (ret == NULL)

305

370

ret = "(unknown)";

306

371

return ret;

313

378

}

314

379

315

380

static int init_gnutls_global(mandos_context *mc,

316

const char *pubkeyfile,

317

const char *seckeyfile){

381

const char *pubkeyfilename,

382

const char *seckeyfilename){

318

383

int ret;

319

384

320

385

if(debug){

339

404

/* OpenPGP credentials */

340

405

gnutls_certificate_allocate_credentials(&mc->cred);

341

406

if (ret != GNUTLS_E_SUCCESS){

342

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

407

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

408

warning */

343

409

safer_gnutls_strerror(ret));

344

410

gnutls_global_deinit ();

345

411

return -1;

346

412

}

347

413

348

414

if(debug){

349

fprintf(stderr, "Attempting to use OpenPGP certificate %s"

350

" and keyfile %s as GnuTLS credentials\n", pubkeyfile,

351

seckeyfile);

415

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

416

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

417

seckeyfilename);

352

418

}

353

419

354

420

ret = gnutls_certificate_set_openpgp_key_file

355

(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);

421

(mc->cred, pubkeyfilename, seckeyfilename,

422

GNUTLS_OPENPGP_FMT_BASE64);

356

423

if (ret != GNUTLS_E_SUCCESS) {

357

424

fprintf(stderr,

358

425

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

359

" '%s')\n", ret, pubkeyfile, seckeyfile);

360

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

426

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

427

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

361

428

safer_gnutls_strerror(ret));

362

429

goto globalfail;

363

430

}

377

444

}

378

445

379

446

gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);

380

447

381

448

return 0;

382

449

383

450

globalfail:

384

451

385

452

gnutls_certificate_free_credentials(mc->cred);

386

453

gnutls_global_deinit();

454

gnutls_dh_params_deinit(mc->dh_params);

387

455

return -1;

388

389

456

}

390

457

391

458

static int init_gnutls_session(mandos_context *mc,

463

530

perror("socket");

464

531

return -1;

465

532

}

466

533

467

534

if(debug){

468

535

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

469

536

perror("if_indextoname");

472

539

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

473

540

}

474

541

475

memset(&to,0,sizeof(to)); /* Spurious warning */

542

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

476

543

to.in6.sin6_family = AF_INET6;

477

544

/* It would be nice to have a way to detect if we were passed an

478

545

IPv4 address here. Now we assume an IPv6 address. */

508

575

perror("connect");

509

576

return -1;

510

577

}

511

578

512

579

const char *out = mandos_protocol_version;

513

580

written = 0;

514

581

while (true){

532

599

}

533

600

}

534

601

}

535

602

536

603

if(debug){

537

604

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

538

605

}

539

606

540

607

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

541

608

542

609

do{

543

610

ret = gnutls_handshake (session);

544

611

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

558

625

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

559

626

ip);

560

627

}

561

628

562

629

while(true){

563

630

buffer_capacity = adjustbuffer(&buffer, buffer_length,

564

631

buffer_capacity);

608

675

gnutls_bye (session, GNUTLS_SHUT_RDWR);

609

676

610

677

if (buffer_length > 0){

611

decrypted_buffer_size = pgp_packet_decrypt(buffer,

678

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

612

679

buffer_length,

613

&decrypted_buffer,

614

keydir);

680

&decrypted_buffer);

615

681

if (decrypted_buffer_size >= 0){

616

682

written = 0;

617

683

while(written < (size_t) decrypted_buffer_size){

632

698

} else {

633

699

retval = -1;

634

700

}

701

} else {

702

retval = -1;

635

703

}

636

704

637

705

/* Shutdown procedure */

638

706

639

707

mandos_end:

640

708

free(buffer);

641

close(tcp_sd);

709

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

710

if(ret == -1){

711

perror("close");

712

}

642

713

gnutls_deinit (session);

643

714

return retval;

644

715

}

658

729

flags,

659

730

void* userdata) {

660

731

mandos_context *mc = userdata;

661

assert(r); /* Spurious warning */

732

assert(r);

662

733

663

734

/* Called whenever a service has been resolved successfully or

664

735

timed out */

700

771

flags,

701

772

void* userdata) {

702

773

mandos_context *mc = userdata;

703

assert(b); /* Spurious warning */

774

assert(b);

704

775

705

776

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

706

777

is removed from the LAN */

740

811

}

741

812

}

742

813

743

/* Combines file name and path and returns the malloced new

744

string. some sane checks could/should be added */

745

static const char *combinepath(const char *first, const char *second){

746

size_t f_len = strlen(first);

747

size_t s_len = strlen(second);

748

char *tmp = malloc(f_len + s_len + 2);

749

if (tmp == NULL){

750

return NULL;

751

}

752

if(f_len > 0){

753

memcpy(tmp, first, f_len); /* Spurious warning */

754

}

755

tmp[f_len] = '/';

756

if(s_len > 0){

757

memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */

758

}

759

tmp[f_len + 1 + s_len] = '\0';

760

return tmp;

761

}

762

763

764

814

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

765

815

AvahiSServiceBrowser *sb = NULL;

766

816

int error;

772

822

uid_t uid;

773

823

gid_t gid;

774

824

char *connect_to = NULL;

825

char tempdir[] = "/tmp/mandosXXXXXX";

775

826

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

776

const char *pubkeyfile = "pubkey.txt";

777

const char *seckeyfile = "seckey.txt";

827

const char *seckey = PATHDIR "/" SECKEY;

828

const char *pubkey = PATHDIR "/" PUBKEY;

829

778

830

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

779

.dh_bits = 1024, .priority = "SECURE256"};

831

.dh_bits = 1024, .priority = "SECURE256"

832

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

780

833

bool gnutls_initalized = false;

834

bool gpgme_initalized = false;

781

835

782

836

{

783

837

struct argp_option options[] = {

784

838

{ .name = "debug", .key = 128,

785

839

.doc = "Debug mode", .group = 3 },

786

840

{ .name = "connect", .key = 'c',

787

.arg = "IP",

788

.doc = "Connect directly to a sepcified mandos server",

841

.arg = "ADDRESS:PORT",

842

.doc = "Connect directly to a specific Mandos server",

789

843

.group = 1 },

790

844

{ .name = "interface", .key = 'i',

791

.arg = "INTERFACE",

792

.doc = "Interface that Avahi will conntect through",

793

.group = 1 },

794

{ .name = "keydir", .key = 'd',

795

.arg = "KEYDIR",

796

.doc = "Directory where the openpgp keyring is",

845

.arg = "NAME",

846

.doc = "Interface that will be used to search for Mandos"

847

" servers",

797

848

.group = 1 },

798

849

{ .name = "seckey", .key = 's',

799

.arg = "SECKEY",

800

.doc = "Secret openpgp key for gnutls authentication",

850

.arg = "FILE",

851

.doc = "OpenPGP secret key file base name",

801

852

.group = 1 },

802

853

{ .name = "pubkey", .key = 'p',

803

.arg = "PUBKEY",

804

.doc = "Public openpgp key for gnutls authentication",

854

.arg = "FILE",

855

.doc = "OpenPGP public key file base name",

805

856

.group = 2 },

806

857

{ .name = "dh-bits", .key = 129,

807

858

.arg = "BITS",

808

.doc = "dh-bits to use in gnutls communication",

859

.doc = "Bit length of the prime number used in the"

860

" Diffie-Hellman key exchange",

809

861

.group = 2 },

810

862

{ .name = "priority", .key = 130,

811

.arg = "PRIORITY",

812

.doc = "GNUTLS priority", .group = 1 },

863

.arg = "STRING",

864

.doc = "GnuTLS priority string for the TLS handshake",

865

.group = 1 },

813

866

{ .name = NULL }

814

867

};

815

816

868

817

869

error_t parse_opt (int key, char *arg,

818

870

struct argp_state *state) {

819

871

/* Get the INPUT argument from `argp_parse', which we know is

820

872

a pointer to our plugin list pointer. */

821

873

switch (key) {

822

case 128:

874

case 128: /* --debug */

823

875

debug = true;

824

876

break;

825

case 'c':

877

case 'c': /* --connect */

826

878

connect_to = arg;

827

879

break;

828

case 'i':

880

case 'i': /* --interface */

829

881

interface = arg;

830

882

break;

831

case 'd':

832

keydir = arg;

833

break;

834

case 's':

835

seckeyfile = arg;

836

break;

837

case 'p':

838

pubkeyfile = arg;

839

break;

840

case 129:

883

case 's': /* --seckey */

884

seckey = arg;

885

break;

886

case 'p': /* --pubkey */

887

pubkey = arg;

888

break;

889

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

841

890

errno = 0;

842

891

mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);

843

892

if (errno){

845

894

exit(EXIT_FAILURE);

846

895

}

847

896

break;

848

case 130:

897

case 130: /* --priority */

849

898

mc.priority = arg;

850

899

break;

851

900

case ARGP_KEY_ARG:

857

906

}

858

907

return 0;

859

908

}

860

909

861

910

struct argp argp = { .options = options, .parser = parse_opt,

862

911

.args_doc = "",

863

912

.doc = "Mandos client -- Get and decrypt"

864

" passwords from mandos server" };

913

" passwords from a Mandos server" };

865

914

ret = argp_parse (&argp, argc, argv, 0, 0, NULL);

866

915

if (ret == ARGP_ERR_UNKNOWN){

867

916

fprintf(stderr, "Unknown error while parsing arguments\n");

869

918

goto end;

870

919

}

871

920

}

872

873

pubkeyfile = combinepath(keydir, pubkeyfile);

874

if (pubkeyfile == NULL){

875

perror("combinepath");

876

exitcode = EXIT_FAILURE;

877

goto end;

878

}

879

880

seckeyfile = combinepath(keydir, seckeyfile);

881

if (seckeyfile == NULL){

882

perror("combinepath");

883

exitcode = EXIT_FAILURE;

884

goto end;

885

}

886

887

ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);

888

if (ret == -1){

889

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

890

exitcode = EXIT_FAILURE;

891

goto end;

892

} else {

893

gnutls_initalized = true;

894

}

895

921

896

922

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

897

923

{

901

927

exitcode = EXIT_FAILURE;

902

928

goto end;

903

929

}

904

strcpy(network.ifr_name, interface); /* Spurious warning */

930

strcpy(network.ifr_name, interface);

905

931

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

906

932

if(ret == -1){

907

933

perror("ioctl SIOCGIFFLAGS");

917

943

goto end;

918

944

}

919

945

}

920

close(sd);

946

ret = TEMP_FAILURE_RETRY(close(sd));

947

if(ret == -1){

948

perror("close");

949

}

921

950

}

922

951

923

952

uid = getuid();

933

962

perror("setgid");

934

963

}

935

964

965

ret = init_gnutls_global(&mc, pubkey, seckey);

966

if (ret == -1){

967

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

968

exitcode = EXIT_FAILURE;

969

goto end;

970

} else {

971

gnutls_initalized = true;

972

}

973

974

if(mkdtemp(tempdir) == NULL){

975

perror("mkdtemp");

976

tempdir[0] = '\0';

977

goto end;

978

}

979

980

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

981

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

982

exitcode = EXIT_FAILURE;

983

goto end;

984

} else {

985

gpgme_initalized = true;

986

}

987

936

988

if_index = (AvahiIfIndex) if_nametoindex(interface);

937

989

if(if_index == 0){

938

990

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

981

1033

exitcode = EXIT_FAILURE;

982

1034

goto end;

983

1035

}

984

1036

985

1037

{

986

1038

AvahiServerConfig config;

987

1039

/* Do not publish any local Zeroconf records */

990

1042

config.publish_addresses = 0;

991

1043

config.publish_workstation = 0;

992

1044

config.publish_domain = 0;

993

1045

994

1046

/* Allocate a new server */

995

1047

mc.server = avahi_server_new(avahi_simple_poll_get

996

1048

(mc.simple_poll), &config, NULL,

997

1049

NULL, &error);

998

1050

999

1051

/* Free the Avahi configuration data */

1000

1052

avahi_server_config_free(&config);

1001

1053

}

1021

1073

}

1022

1074

1023

1075

/* Run the main loop */

1024

1076

1025

1077

if (debug){

1026

1078

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

1027

1079

}

1029

1081

avahi_simple_poll_loop(mc.simple_poll);

1030

1082

1031

1083

end:

1032

1084

1033

1085

if (debug){

1034

1086

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

1035

1087

}

1040

1092

1041

1093

if (mc.server != NULL)

1042

1094

avahi_server_free(mc.server);

1043

1095

1044

1096

if (mc.simple_poll != NULL)

1045

1097

avahi_simple_poll_free(mc.simple_poll);

1046

free(pubkeyfile);

1047

free(seckeyfile);

1048

1098

1049

1099

if (gnutls_initalized){

1050

1100

gnutls_certificate_free_credentials(mc.cred);

1051

1101

gnutls_global_deinit ();

1052

}

1053

1102

gnutls_dh_params_deinit(mc.dh_params);

1103

}

1104

1105

if(gpgme_initalized){

1106

gpgme_release(mc.ctx);

1107

}

1108

1109

/* Removes the temp directory used by GPGME */

1110

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

1111

DIR *d;

1112

struct dirent *direntry;

1113

d = opendir(tempdir);

1114

if(d == NULL){

1115

perror("opendir");

1116

} else {

1117

while(true){

1118

direntry = readdir(d);

1119

if(direntry == NULL){

1120

break;

1121

}

1122

if (direntry->d_type == DT_REG){

1123

char *fullname = NULL;

1124

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

1125

direntry->d_name);

1126

if(ret < 0){

1127

perror("asprintf");

1128

continue;

1129

}

1130

ret = unlink(fullname);

1131

if(ret == -1){

1132

fprintf(stderr, "unlink(\"%s\"): %s",

1133

fullname, strerror(errno));

1134

}

1135

free(fullname);

1136

}

1137

}

1138

closedir(d);

1139

}

1140

ret = rmdir(tempdir);

1141

if(ret == -1){

1142

perror("rmdir");

1143

}

1144

}

1145

1054

1146

return exitcode;

1055

1147

}