/mandos/trunk : revision 174

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() */

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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

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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

318

perror("pgpme_data_seek");

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();

387

454

return -1;

388

389

455

}

390

456

391

457

static int init_gnutls_session(mandos_context *mc,

463

529

perror("socket");

464

530

return -1;

465

531

}

466

532

467

533

if(debug){

468

534

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

469

535

perror("if_indextoname");

472

538

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

473

539

}

474

540

475

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

541

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

476

542

to.in6.sin6_family = AF_INET6;

477

543

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

478

544

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

508

574

perror("connect");

509

575

return -1;

510

576

}

511

577

512

578

const char *out = mandos_protocol_version;

513

579

written = 0;

514

580

while (true){

532

598

}

533

599

}

534

600

}

535

601

536

602

if(debug){

537

603

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

538

604

}

539

605

540

606

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

541

607

542

608

do{

543

609

ret = gnutls_handshake (session);

544

610

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

558

624

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

559

625

ip);

560

626

}

561

627

562

628

while(true){

563

629

buffer_capacity = adjustbuffer(&buffer, buffer_length,

564

630

buffer_capacity);

608

674

gnutls_bye (session, GNUTLS_SHUT_RDWR);

609

675

610

676

if (buffer_length > 0){

611

decrypted_buffer_size = pgp_packet_decrypt(buffer,

677

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

612

678

buffer_length,

613

&decrypted_buffer,

614

keydir);

679

&decrypted_buffer);

615

680

if (decrypted_buffer_size >= 0){

616

681

written = 0;

617

682

while(written < (size_t) decrypted_buffer_size){

632

697

} else {

633

698

retval = -1;

634

699

}

700

} else {

701

retval = -1;

635

702

}

636

703

637

704

/* Shutdown procedure */

638

705

639

706

mandos_end:

640

707

free(buffer);

641

close(tcp_sd);

708

ret = TEMP_FAILURE_RETRY(close(tcp_sd));

709

if(ret == -1){

710

perror("close");

711

}

642

712

gnutls_deinit (session);

643

713

return retval;

644

714

}

658

728

flags,

659

729

void* userdata) {

660

730

mandos_context *mc = userdata;

661

assert(r); /* Spurious warning */

731

assert(r);

662

732

663

733

/* Called whenever a service has been resolved successfully or

664

734

timed out */

700

770

flags,

701

771

void* userdata) {

702

772

mandos_context *mc = userdata;

703

assert(b); /* Spurious warning */

773

assert(b);

704

774

705

775

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

706

776

is removed from the LAN */

740

810

}

741

811

}

742

812

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

813

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

765

814

AvahiSServiceBrowser *sb = NULL;

766

815

int error;

772

821

uid_t uid;

773

822

gid_t gid;

774

823

char *connect_to = NULL;

824

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

775

825

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

776

const char *pubkeyfile = "pubkey.txt";

777

const char *seckeyfile = "seckey.txt";

826

const char *seckey = PATHDIR "/" SECKEY;

827

const char *pubkey = PATHDIR "/" PUBKEY;

828

778

829

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

779

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

830

.dh_bits = 1024, .priority = "SECURE256"

831

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

780

832

bool gnutls_initalized = false;

833

bool pgpme_initalized = false;

781

834

782

835

{

783

836

struct argp_option options[] = {

784

837

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

785

838

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

786

839

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

787

.arg = "IP",

788

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

840

.arg = "ADDRESS:PORT",

841

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

789

842

.group = 1 },

790

843

{ .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",

844

.arg = "NAME",

845

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

846

" servers",

797

847

.group = 1 },

798

848

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

799

.arg = "SECKEY",

800

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

849

.arg = "FILE",

850

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

801

851

.group = 1 },

802

852

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

803

.arg = "PUBKEY",

804

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

853

.arg = "FILE",

854

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

805

855

.group = 2 },

806

856

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

807

857

.arg = "BITS",

808

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

858

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

859

" Diffie-Hellman key exchange",

809

860

.group = 2 },

810

861

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

811

.arg = "PRIORITY",

812

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

862

.arg = "STRING",

863

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

864

.group = 1 },

813

865

{ .name = NULL }

814

866

};

815

816

867

817

868

error_t parse_opt (int key, char *arg,

818

869

struct argp_state *state) {

819

870

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

820

871

a pointer to our plugin list pointer. */

821

872

switch (key) {

822

case 128:

873

case 128: /* --debug */

823

874

debug = true;

824

875

break;

825

case 'c':

876

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

826

877

connect_to = arg;

827

878

break;

828

case 'i':

879

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

829

880

interface = arg;

830

881

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:

882

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

883

seckey = arg;

884

break;

885

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

886

pubkey = arg;

887

break;

888

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

841

889

errno = 0;

842

890

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

843

891

if (errno){

845

893

exit(EXIT_FAILURE);

846

894

}

847

895

break;

848

case 130:

896

case 130: /* --priority */

849

897

mc.priority = arg;

850

898

break;

851

899

case ARGP_KEY_ARG:

857

905

}

858

906

return 0;

859

907

}

860

908

861

909

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

862

910

.args_doc = "",

863

911

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

864

" passwords from mandos server" };

912

" passwords from a Mandos server" };

865

913

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

866

914

if (ret == ARGP_ERR_UNKNOWN){

867

915

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

869

917

goto end;

870

918

}

871

919

}

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

920

896

921

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

897

922

{

901

926

exitcode = EXIT_FAILURE;

902

927

goto end;

903

928

}

904

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

929

strcpy(network.ifr_name, interface);

905

930

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

906

931

if(ret == -1){

907

932

perror("ioctl SIOCGIFFLAGS");

917

942

goto end;

918

943

}

919

944

}

920

close(sd);

945

ret = TEMP_FAILURE_RETRY(close(sd));

946

if(ret == -1){

947

perror("close");

948

}

921

949

}

922

950

923

951

uid = getuid();

933

961

perror("setgid");

934

962

}

935

963

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

936

987

if_index = (AvahiIfIndex) if_nametoindex(interface);

937

988

if(if_index == 0){

938

989

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

981

1032

exitcode = EXIT_FAILURE;

982

1033

goto end;

983

1034

}

984

1035

985

1036

{

986

1037

AvahiServerConfig config;

987

1038

/* Do not publish any local Zeroconf records */

990

1041

config.publish_addresses = 0;

991

1042

config.publish_workstation = 0;

992

1043

config.publish_domain = 0;

993

1044

994

1045

/* Allocate a new server */

995

1046

mc.server = avahi_server_new(avahi_simple_poll_get

996

1047

(mc.simple_poll), &config, NULL,

997

1048

NULL, &error);

998

1049

999

1050

/* Free the Avahi configuration data */

1000

1051

avahi_server_config_free(&config);

1001

1052

}

1021

1072

}

1022

1073

1023

1074

/* Run the main loop */

1024

1075

1025

1076

if (debug){

1026

1077

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

1027

1078

}

1029

1080

avahi_simple_poll_loop(mc.simple_poll);

1030

1081

1031

1082

end:

1032

1083

1033

1084

if (debug){

1034

1085

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

1035

1086

}

1040

1091

1041

1092

if (mc.server != NULL)

1042

1093

avahi_server_free(mc.server);

1043

1094

1044

1095

if (mc.simple_poll != NULL)

1045

1096

avahi_simple_poll_free(mc.simple_poll);

1046

free(pubkeyfile);

1047

free(seckeyfile);

1048

1097

1049

1098

if (gnutls_initalized){

1050

1099

gnutls_certificate_free_credentials(mc.cred);

1051

1100

gnutls_global_deinit ();

1052

1101

}

1053

1102

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

1054

1143

return exitcode;

1055

1144

}