/mandos/trunk : revision 73

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

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

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

36

37

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

38

stdout, ferror() */

37

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

38

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

45

strerror(), memcpy(), 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, open(), opendir(), DIR */

51

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

50

uid_t, gid_t */

51

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

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 */

58

55

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

59

56

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

60

57

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

61

58

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

62

59

SIOCSIFFLAGS, if_indextoname(),

63

60

if_nametoindex(), IF_NAMESIZE */

64

#include <netinet/in.h>

65

61

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

66

62

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

67

63

setgid() */

64

#include <netinet/in.h>

68

65

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

69

66

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

70

67

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

84

81

#include <avahi-common/error.h>

85

82

86

83

/* GnuTLS */

87

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

88

functions:

84

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

89

85

gnutls_*

90

86

init_gnutls_session(),

91

87

GNUTLS_* */

93

89

GNUTLS_OPENPGP_FMT_BASE64 */

94

90

95

91

/* GPGME */

96

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

97

functions:

92

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

98

93

gpgme_*

99

94

GPGME_PROTOCOL_OpenPGP,

100

95

GPG_ERR_NO_* */

101

96

102

97

#define BUFFER_SIZE 256

103

98

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

112

99

bool debug = false;

100

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

113

101

static const char mandos_protocol_version[] = "1";

114

102

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

115

103

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

122

110

unsigned int dh_bits;

123

111

gnutls_dh_params_t dh_params;

124

112

const char *priority;

125

gpgme_ctx_t ctx;

126

113

} mandos_context;

127

114

128

115

/*

143

130

}

144

131

145

132

/*

146

* Initialize GPGME.

133

* Decrypt OpenPGP data using keyrings in HOMEDIR.

134

* Returns -1 on error

147

135

*/

148

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

149

const char *pubkey, const char *tempdir){

150

int ret;

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;

151

142

gpgme_error_t rc;

143

ssize_t ret;

144

size_t plaintext_capacity = 0;

145

ssize_t plaintext_length = 0;

152

146

gpgme_engine_info_t engine_info;

153

147

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

190

148

if (debug){

191

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

149

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

192

150

}

193

151

194

152

/* Init GPGME */

197

155

if (rc != GPG_ERR_NO_ERROR){

198

156

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

199

157

gpgme_strsource(rc), gpgme_strerror(rc));

200

return false;

158

return -1;

201

159

}

202

160

203

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

161

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

204

162

rc = gpgme_get_engine_info (&engine_info);

205

163

if (rc != GPG_ERR_NO_ERROR){

206

164

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

207

165

gpgme_strsource(rc), gpgme_strerror(rc));

208

return false;

166

return -1;

209

167

}

210

168

while(engine_info != NULL){

211

169

if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){

212

170

gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,

213

engine_info->file_name, tempdir);

171

engine_info->file_name, homedir);

214

172

break;

215

173

}

216

174

engine_info = engine_info->next;

217

175

}

218

176

if(engine_info == NULL){

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");

177

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

178

return -1;

254

179

}

255

180

256

181

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

271

196

return -1;

272

197

}

273

198

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

274

208

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

275

209

data buffer */

276

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

210

rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);

277

211

if (rc != GPG_ERR_NO_ERROR){

278

212

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

279

213

gpgme_strsource(rc), gpgme_strerror(rc));

280

214

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

}

309

215

goto decrypt_end;

310

216

}

311

217

313

219

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

314

220

}

315

221

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

316

251

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

317

252

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

318

253

perror("pgpme_data_seek");

345

280

}

346

281

plaintext_length += ret;

347

282

}

348

283

349

284

if(debug){

350

285

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

351

286

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

365

300

}

366

301

367

302

static const char * safer_gnutls_strerror (int value) {

368

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

303

const char *ret = gnutls_strerror (value);

369

304

if (ret == NULL)

370

305

ret = "(unknown)";

371

306

return ret;

378

313

}

379

314

380

315

static int init_gnutls_global(mandos_context *mc,

381

const char *pubkeyfilename,

382

const char *seckeyfilename){

316

const char *pubkeyfile,

317

const char *seckeyfile){

383

318

int ret;

384

319

385

320

if(debug){

404

339

/* OpenPGP credentials */

405

340

gnutls_certificate_allocate_credentials(&mc->cred);

406

341

if (ret != GNUTLS_E_SUCCESS){

407

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

408

warning */

342

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

409

343

safer_gnutls_strerror(ret));

410

344

gnutls_global_deinit ();

411

345

return -1;

412

346

}

413

347

414

348

if(debug){

415

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

416

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

417

seckeyfilename);

349

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

350

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

351

seckeyfile);

418

352

}

419

353

420

354

ret = gnutls_certificate_set_openpgp_key_file

421

(mc->cred, pubkeyfilename, seckeyfilename,

422

GNUTLS_OPENPGP_FMT_BASE64);

355

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

423

356

if (ret != GNUTLS_E_SUCCESS) {

424

357

fprintf(stderr,

425

358

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

426

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

427

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

359

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

360

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

428

361

safer_gnutls_strerror(ret));

429

362

goto globalfail;

430

363

}

444

377

}

445

378

446

379

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

447

380

448

381

return 0;

449

382

450

383

globalfail:

451

384

452

385

gnutls_certificate_free_credentials(mc->cred);

453

386

gnutls_global_deinit();

454

387

return -1;

388

455

389

}

456

390

457

391

static int init_gnutls_session(mandos_context *mc,

529

463

perror("socket");

530

464

return -1;

531

465

}

532

466

533

467

if(debug){

534

468

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

535

469

perror("if_indextoname");

538

472

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

539

473

}

540

474

541

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

475

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

542

476

to.in6.sin6_family = AF_INET6;

543

477

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

544

478

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

574

508

perror("connect");

575

509

return -1;

576

510

}

577

511

578

512

const char *out = mandos_protocol_version;

579

513

written = 0;

580

514

while (true){

598

532

}

599

533

}

600

534

}

601

535

602

536

if(debug){

603

537

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

604

538

}

605

539

606

540

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

607

541

608

542

do{

609

543

ret = gnutls_handshake (session);

610

544

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

624

558

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

625

559

ip);

626

560

}

627

561

628

562

while(true){

629

563

buffer_capacity = adjustbuffer(&buffer, buffer_length,

630

564

buffer_capacity);

674

608

gnutls_bye (session, GNUTLS_SHUT_RDWR);

675

609

676

610

if (buffer_length > 0){

677

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

611

decrypted_buffer_size = pgp_packet_decrypt(buffer,

678

612

buffer_length,

679

&decrypted_buffer);

613

&decrypted_buffer,

614

keydir);

680

615

if (decrypted_buffer_size >= 0){

681

616

written = 0;

682

617

while(written < (size_t) decrypted_buffer_size){

697

632

} else {

698

633

retval = -1;

699

634

}

700

} else {

701

retval = -1;

702

635

}

703

636

704

637

/* Shutdown procedure */

705

638

706

639

mandos_end:

707

640

free(buffer);

708

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

709

if(ret == -1){

710

perror("close");

711

}

641

close(tcp_sd);

712

642

gnutls_deinit (session);

713

643

return retval;

714

644

}

728

658

flags,

729

659

void* userdata) {

730

660

mandos_context *mc = userdata;

731

assert(r);

661

assert(r); /* Spurious warning */

732

662

733

663

/* Called whenever a service has been resolved successfully or

734

664

timed out */

770

700

flags,

771

701

void* userdata) {

772

702

mandos_context *mc = userdata;

773

assert(b);

703

assert(b); /* Spurious warning */

774

704

775

705

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

776

706

is removed from the LAN */

810

740

}

811

741

}

812

742

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

813

764

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

814

765

AvahiSServiceBrowser *sb = NULL;

815

766

int error;

821

772

uid_t uid;

822

773

gid_t gid;

823

774

char *connect_to = NULL;

824

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

825

775

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

826

const char *seckey = PATHDIR "/" SECKEY;

827

const char *pubkey = PATHDIR "/" PUBKEY;

828

776

const char *pubkeyfile = "pubkey.txt";

777

const char *seckeyfile = "seckey.txt";

829

778

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

830

.dh_bits = 1024, .priority = "SECURE256"

831

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

779

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

832

780

bool gnutls_initalized = false;

833

bool pgpme_initalized = false;

834

781

835

782

{

836

783

struct argp_option options[] = {

837

784

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

838

785

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

839

786

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

840

.arg = "ADDRESS:PORT",

841

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

787

.arg = "IP",

788

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

842

789

.group = 1 },

843

790

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

844

.arg = "NAME",

845

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

846

" servers",

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",

847

797

.group = 1 },

848

798

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

849

.arg = "FILE",

850

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

799

.arg = "SECKEY",

800

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

851

801

.group = 1 },

852

802

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

853

.arg = "FILE",

854

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

803

.arg = "PUBKEY",

804

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

855

805

.group = 2 },

856

806

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

857

807

.arg = "BITS",

858

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

859

" Diffie-Hellman key exchange",

808

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

860

809

.group = 2 },

861

810

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

862

.arg = "STRING",

863

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

864

.group = 1 },

811

.arg = "PRIORITY",

812

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

865

813

{ .name = NULL }

866

814

};

815

867

816

868

817

error_t parse_opt (int key, char *arg,

869

818

struct argp_state *state) {

870

819

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

871

820

a pointer to our plugin list pointer. */

872

821

switch (key) {

873

case 128: /* --debug */

822

case 128:

874

823

debug = true;

875

824

break;

876

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

825

case 'c':

877

826

connect_to = arg;

878

827

break;

879

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

828

case 'i':

880

829

interface = arg;

881

830

break;

882

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

883

seckey = arg;

884

break;

885

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

886

pubkey = arg;

887

break;

888

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

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:

889

841

errno = 0;

890

842

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

891

843

if (errno){

893

845

exit(EXIT_FAILURE);

894

846

}

895

847

break;

896

case 130: /* --priority */

848

case 130:

897

849

mc.priority = arg;

898

850

break;

899

851

case ARGP_KEY_ARG:

905

857

}

906

858

return 0;

907

859

}

908

860

909

861

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

910

862

.args_doc = "",

911

863

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

912

" passwords from a Mandos server" };

864

" passwords from mandos server" };

913

865

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

914

866

if (ret == ARGP_ERR_UNKNOWN){

915

867

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

917

869

goto end;

918

870

}

919

871

}

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

}

920

895

921

896

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

922

897

{

926

901

exitcode = EXIT_FAILURE;

927

902

goto end;

928

903

}

929

strcpy(network.ifr_name, interface);

904

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

930

905

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

931

906

if(ret == -1){

932

907

perror("ioctl SIOCGIFFLAGS");

942

917

goto end;

943

918

}

944

919

}

945

ret = TEMP_FAILURE_RETRY(close(sd));

946

if(ret == -1){

947

perror("close");

948

}

920

close(sd);

949

921

}

950

922

951

923

uid = getuid();

961

933

perror("setgid");

962

934

}

963

935

964

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

965

if (ret == -1){

966

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

967

exitcode = EXIT_FAILURE;

968

goto end;

969

} else {

970

gnutls_initalized = true;

971

}

972

973

if(mkdtemp(tempdir) == NULL){

974

perror("mkdtemp");

975

tempdir[0] = '\0';

976

goto end;

977

}

978

979

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

980

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

981

exitcode = EXIT_FAILURE;

982

goto end;

983

} else {

984

pgpme_initalized = true;

985

}

986

987

936

if_index = (AvahiIfIndex) if_nametoindex(interface);

988

937

if(if_index == 0){

989

938

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

1032

981

exitcode = EXIT_FAILURE;

1033

982

goto end;

1034

983

}

1035

984

1036

985

{

1037

986

AvahiServerConfig config;

1038

987

/* Do not publish any local Zeroconf records */

1041

990

config.publish_addresses = 0;

1042

991

config.publish_workstation = 0;

1043

992

config.publish_domain = 0;

1044

993

1045

994

/* Allocate a new server */

1046

995

mc.server = avahi_server_new(avahi_simple_poll_get

1047

996

(mc.simple_poll), &config, NULL,

1048

997

NULL, &error);

1049

998

1050

999

/* Free the Avahi configuration data */

1051

1000

avahi_server_config_free(&config);

1052

1001

}

1072

1021

}

1073

1022

1074

1023

/* Run the main loop */

1075

1024

1076

1025

if (debug){

1077

1026

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

1078

1027

}

1080

1029

avahi_simple_poll_loop(mc.simple_poll);

1081

1030

1082

1031

end:

1083

1032

1084

1033

if (debug){

1085

1034

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

1086

1035

}

1091

1040

1092

1041

if (mc.server != NULL)

1093

1042

avahi_server_free(mc.server);

1094

1043

1095

1044

if (mc.simple_poll != NULL)

1096

1045

avahi_simple_poll_free(mc.simple_poll);

1097

1046

free(pubkeyfile);

1047

free(seckeyfile);

1048

1098

1049

if (gnutls_initalized){

1099

1050

gnutls_certificate_free_credentials(mc.cred);

1100

1051

gnutls_global_deinit ();

1101

1052

}

1102

1053

1103

if(pgpme_initalized){

1104

gpgme_release(mc.ctx);

1105

}

1106

1107

/* Removes the temp directory used by GPGME */

1108

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

1109

DIR *d;

1110

struct dirent *direntry;

1111

d = opendir(tempdir);

1112

if(d == NULL){

1113

perror("opendir");

1114

} else {

1115

while(true){

1116

direntry = readdir(d);

1117

if(direntry == NULL){

1118

break;

1119

}

1120

if (direntry->d_type == DT_REG){

1121

char *fullname = NULL;

1122

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

1123

direntry->d_name);

1124

if(ret < 0){

1125

perror("asprintf");

1126

continue;

1127

}

1128

ret = unlink(fullname);

1129

if(ret == -1){

1130

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

1131

fullname, strerror(errno));

1132

}

1133

free(fullname);

1134

}

1135

}

1136

}

1137

ret = rmdir(tempdir);

1138

if(ret == -1){

1139

perror("rmdir");

1140

}

1141

}

1142

1143

1054

return exitcode;

1144

1055

}