openssl/ssl/s2_pkt.c - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

Side by Side Diff: openssl/ssl/s2_pkt.c

Issue 2072073002: Delete bundled copy of OpenSSL and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master

Patch Set: Delete bundled copy of OpenSSL and replace with README. Created 4 years, 6 months ago

Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.

Jump to:

View unified diff | Download patch

OLD	NEW
	(Empty)
1 /* ssl/s2_pkt.c */

2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

3 * All rights reserved.

4 *

5 * This package is an SSL implementation written

6 * by Eric Young (eay@cryptsoft.com).

7 * The implementation was written so as to conform with Netscapes SSL.

8 *

9 * This library is free for commercial and non-commercial use as long as

10 * the following conditions are aheared to. The following conditions

11 * apply to all code found in this distribution, be it the RC4, RSA,

12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation

13 * included with this distribution is covered by the same copyright terms

14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

15 *

16 * Copyright remains Eric Young's, and as such any Copyright notices in

17 * the code are not to be removed.

18 * If this package is used in a product, Eric Young should be given attribution

19 * as the author of the parts of the library used.

20 * This can be in the form of a textual message at program startup or

21 * in documentation (online or textual) provided with the package.

22 *

23 * Redistribution and use in source and binary forms, with or without

24 * modification, are permitted provided that the following conditions

25 * are met:

26 * 1. Redistributions of source code must retain the copyright

27 * notice, this list of conditions and the following disclaimer.

28 * 2. Redistributions in binary form must reproduce the above copyright

29 * notice, this list of conditions and the following disclaimer in the

30 * documentation and/or other materials provided with the distribution.

31 * 3. All advertising materials mentioning features or use of this software

32 * must display the following acknowledgement:

33 * "This product includes cryptographic software written by

34 * Eric Young (eay@cryptsoft.com)"

35 * The word 'cryptographic' can be left out if the rouines from the library

36 * being used are not cryptographic related :-).

37 * 4. If you include any Windows specific code (or a derivative thereof) from

38 * the apps directory (application code) you must include an acknowledgement:

39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

40 *

41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

51 * SUCH DAMAGE.

52 *

53 * The licence and distribution terms for any publically available version or

54 * derivative of this code cannot be changed. i.e. this code cannot simply be

55 * copied and put under another distribution licence

56 * [including the GNU Public Licence.]

57 */

58 /* ====================================================================

59 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.

60 *

61 * Redistribution and use in source and binary forms, with or without

62 * modification, are permitted provided that the following conditions

63 * are met:

64 *

65 * 1. Redistributions of source code must retain the above copyright

66 * notice, this list of conditions and the following disclaimer.

67 *

68 * 2. Redistributions in binary form must reproduce the above copyright

69 * notice, this list of conditions and the following disclaimer in

70 * the documentation and/or other materials provided with the

71 * distribution.

72 *

73 * 3. All advertising materials mentioning features or use of this

74 * software must display the following acknowledgment:

75 * "This product includes software developed by the OpenSSL Project

76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

77 *

78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

79 * endorse or promote products derived from this software without

80 * prior written permission. For written permission, please contact

81 * openssl-core@openssl.org.

82 *

83 * 5. Products derived from this software may not be called "OpenSSL"

84 * nor may "OpenSSL" appear in their names without prior written

85 * permission of the OpenSSL Project.

86 *

87 * 6. Redistributions of any form whatsoever must retain the following

88 * acknowledgment:

89 * "This product includes software developed by the OpenSSL Project

90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"

91 *

92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR

96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

103 * OF THE POSSIBILITY OF SUCH DAMAGE.

104 * ====================================================================

105 *

106 * This product includes cryptographic software written by Eric Young

107 * (eay@cryptsoft.com). This product includes software written by Tim

108 * Hudson (tjh@cryptsoft.com).

109 *

110 */

111

112 #include "ssl_locl.h"

113 #ifndef OPENSSL_NO_SSL2

114 #include <stdio.h>

115 #include <errno.h>

116 #define USE_SOCKETS

117

118 static int read_n(SSL *s,unsigned int n,unsigned int max,unsigned int extend);

119 static int n_do_ssl_write(SSL s, const unsigned char buf, unsigned int len);

120 static int write_pending(SSL s, const unsigned char buf, unsigned int len);

121 static int ssl_mt_error(int n);

122

123

124 /* SSL 2.0 imlementation for SSL_read/SSL_peek -

125 * This routine will return 0 to len bytes, decrypted etc if required.

126 */

127 static int ssl2_read_internal(SSL s, void buf, int len, int peek)

128 {

129 int n;

130 unsigned char mac[MAX_MAC_SIZE];

131 unsigned char *p;

132 int i;

133 int mac_size;

134

135 ssl2_read_again:

136 if (SSL_in_init(s) && !s->in_handshake)

137 {

138 n=s->handshake_func(s);

139 if (n < 0) return(n);

140 if (n == 0)

141 {

142 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_SSL_HANDSHAKE_FAIL URE);

143 return(-1);

144 }

145 }

146

147 clear_sys_error();

148 s->rwstate=SSL_NOTHING;

149 if (len <= 0) return(len);

150

151 if (s->s2->ract_data_length != 0) /* read from buffer */

152 {

153 if (len > s->s2->ract_data_length)

154 n=s->s2->ract_data_length;

155 else

156 n=len;

157

158 memcpy(buf,s->s2->ract_data,(unsigned int)n);

159 if (!peek)

160 {

161 s->s2->ract_data_length-=n;

162 s->s2->ract_data+=n;

163 if (s->s2->ract_data_length == 0)

164 s->rstate=SSL_ST_READ_HEADER;

165 }

166

167 return(n);

168 }

169

170 /* s->s2->ract_data_length == 0

171 *

172 * Fill the buffer, then goto ssl2_read_again.

173 */

174

175 if (s->rstate == SSL_ST_READ_HEADER)

176 {

177 if (s->first_packet)

178 {

179 n=read_n(s,5,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);

180 if (n <= 0) return(n); /* error or non-blocking */

181 s->first_packet=0;

182 p=s->packet;

183 if (!((p[0] & 0x80) && (

184 (p[2] == SSL2_MT_CLIENT_HELLO) \|\|

185 (p[2] == SSL2_MT_SERVER_HELLO))))

186 {

187 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_NON_SSLV2_ INITIAL_PACKET);

188 return(-1);

189 }

190 }

191 else

192 {

193 n=read_n(s,2,SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2,0);

194 if (n <= 0) return(n); /* error or non-blocking */

195 }

196 /* part read stuff */

197

198 s->rstate=SSL_ST_READ_BODY;

199 p=s->packet;

200 /* Do header */

201 /s->s2->padding=0;/

202 s->s2->escape=0;

203 s->s2->rlength=(((unsigned int)p[0])<<8)\|((unsigned int)p[1]);

204 if ((p[0] & TWO_BYTE_BIT)) /* Two byte header? */

205 {

206 s->s2->three_byte_header=0;

207 s->s2->rlength&=TWO_BYTE_MASK;

208 }

209 else

210 {

211 s->s2->three_byte_header=1;

212 s->s2->rlength&=THREE_BYTE_MASK;

213

214 /* security >s2->escape */

215 s->s2->escape=((p[0] & SEC_ESC_BIT))?1:0;

216 }

217 }

218

219 if (s->rstate == SSL_ST_READ_BODY)

220 {

221 n=s->s2->rlength+2+s->s2->three_byte_header;

222 if (n > (int)s->packet_length)

223 {

224 n-=s->packet_length;

225 i=read_n(s,(unsigned int)n,(unsigned int)n,1);

226 if (i <= 0) return(i); /* ERROR */

227 }

228

229 p= &(s->packet[2]);

230 s->rstate=SSL_ST_READ_HEADER;

231 if (s->s2->three_byte_header)

232 s->s2->padding= *(p++);

233 else s->s2->padding=0;

234

235 /* Data portion */

236 if (s->s2->clear_text)

237 {

238 mac_size = 0;

239 s->s2->mac_data=p;

240 s->s2->ract_data=p;

241 if (s->s2->padding)

242 {

243 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_ILLEGAL_PA DDING);

244 return(-1);

245 }

246 }

247 else

248 {

249 mac_size=EVP_MD_CTX_size(s->read_hash);

250 if (mac_size < 0)

251 return -1;

252 OPENSSL_assert(mac_size <= MAX_MAC_SIZE);

253 s->s2->mac_data=p;

254 s->s2->ract_data= &p[mac_size];

255 if (s->s2->padding + mac_size > s->s2->rlength)

256 {

257 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_ILLEGAL_PA DDING);

258 return(-1);

259 }

260 }

261

262 s->s2->ract_data_length=s->s2->rlength;

263 /* added a check for length > max_size in case

264 * encryption was not turned on yet due to an error */

265 if ((!s->s2->clear_text) &&

266 (s->s2->rlength >= (unsigned int)mac_size))

267 {

268 ssl2_enc(s,0);

269 s->s2->ract_data_length-=mac_size;

270 ssl2_mac(s,mac,0);

271 s->s2->ract_data_length-=s->s2->padding;

272 if ( (CRYPTO_memcmp(mac,s->s2->mac_data,mac_size) != 0) \|\|

273 (s->s2->rlength%EVP_CIPHER_CTX_block_size(s->enc _read_ctx) != 0))

274 {

275 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_BAD_MAC_DE CODE);

276 return(-1);

277 }

278 }

279 INC32(s->s2->read_sequence); /* expect next number */

280 /* s->s2->ract_data is now available for processing */

281

282 /* Possibly the packet that we just read had 0 actual data bytes .

283 * (SSLeay/OpenSSL itself never sends such packets; see ssl2_wri te.)

284 * In this case, returning 0 would be interpreted by the caller

285 * as indicating EOF, so it's not a good idea. Instead, we just

286 * continue reading; thus ssl2_read_internal may have to process

287 * multiple packets before it can return.

288 *

289 * [Note that using select() for blocking sockets never guaran tees

290 * that the next SSL_read will not block -- the available

291 * data may contain incomplete packets, and except for SSL 2,

292 * renegotiation can confuse things even more.] */

293

294 goto ssl2_read_again; /* This should really be

295 * "return ssl2_read(s,buf,len)",

296 * but that would allow for

297 * denial-of-service attacks if a

298 * C compiler is used that does not

299 * recognize end-recursion. */

300 }

301 else

302 {

303 SSLerr(SSL_F_SSL2_READ_INTERNAL,SSL_R_BAD_STATE);

304 return(-1);

305 }

306 }

307

308 int ssl2_read(SSL s, void buf, int len)

309 {

310 return ssl2_read_internal(s, buf, len, 0);

311 }

312

313 int ssl2_peek(SSL s, void buf, int len)

314 {

315 return ssl2_read_internal(s, buf, len, 1);

316 }

317

318 static int read_n(SSL *s, unsigned int n, unsigned int max,

319 unsigned int extend)

320 {

321 int i,off,newb;

322

323 /* if there is stuff still in the buffer from a previous read,

324 * and there is more than we want, take some. */

325 if (s->s2->rbuf_left >= (int)n)

326 {

327 if (extend)

328 s->packet_length+=n;

329 else

330 {

331 s->packet= &(s->s2->rbuf[s->s2->rbuf_offs]);

332 s->packet_length=n;

333 }

334 s->s2->rbuf_left-=n;

335 s->s2->rbuf_offs+=n;

336 return(n);

337 }

338

339 if (!s->read_ahead) max=n;

340 if (max > (unsigned int)(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2))

341 max=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2;

342

343

344 /* Else we want more than we have.

345 * First, if there is some left or we want to extend */

346 off=0;

347 if ((s->s2->rbuf_left != 0) \|\| ((s->packet_length != 0) && extend))

348 {

349 newb=s->s2->rbuf_left;

350 if (extend)

351 {

352 off=s->packet_length;

353 if (s->packet != s->s2->rbuf)

354 memcpy(s->s2->rbuf,s->packet,

355 (unsigned int)newb+off);

356 }

357 else if (s->s2->rbuf_offs != 0)

358 {

359 memcpy(s->s2->rbuf,&(s->s2->rbuf[s->s2->rbuf_offs]),

360 (unsigned int)newb);

361 s->s2->rbuf_offs=0;

362 }

363 s->s2->rbuf_left=0;

364 }

365 else

366 newb=0;

367

368 /* off is the offset to start writing too.

369 * r->s2->rbuf_offs is the 'unread data', now 0.

370 * newb is the number of new bytes so far

371 */

372 s->packet=s->s2->rbuf;

373 while (newb < (int)n)

374 {

375 clear_sys_error();

376 if (s->rbio != NULL)

377 {

378 s->rwstate=SSL_READING;

379 i=BIO_read(s->rbio,(char *)&(s->s2->rbuf[off+newb]),

380 max-newb);

381 }

382 else

383 {

384 SSLerr(SSL_F_READ_N,SSL_R_READ_BIO_NOT_SET);

385 i= -1;

386 }

387 #ifdef PKT_DEBUG

388 if (s->debug & 0x01) sleep(1);

389 #endif

390 if (i <= 0)

391 {

392 s->s2->rbuf_left+=newb;

393 return(i);

394 }

395 newb+=i;

396 }

397

398 /* record unread data */

399 if (newb > (int)n)

400 {

401 s->s2->rbuf_offs=n+off;

402 s->s2->rbuf_left=newb-n;

403 }

404 else

405 {

406 s->s2->rbuf_offs=0;

407 s->s2->rbuf_left=0;

408 }

409 if (extend)

410 s->packet_length+=n;

411 else

412 s->packet_length=n;

413 s->rwstate=SSL_NOTHING;

414 return(n);

415 }

416

417 int ssl2_write(SSL s, const void _buf, int len)

418 {

419 const unsigned char *buf=_buf;

420 unsigned int n,tot;

421 int i;

422

423 if (SSL_in_init(s) && !s->in_handshake)

424 {

425 i=s->handshake_func(s);

426 if (i < 0) return(i);

427 if (i == 0)

428 {

429 SSLerr(SSL_F_SSL2_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);

430 return(-1);

431 }

432 }

433

434 if (s->error)

435 {

436 ssl2_write_error(s);

437 if (s->error)

438 return(-1);

439 }

440

441 clear_sys_error();

442 s->rwstate=SSL_NOTHING;

443 if (len <= 0) return(len);

444

445 tot=s->s2->wnum;

446 s->s2->wnum=0;

447

448 n=(len-tot);

449 for (;;)

450 {

451 i=n_do_ssl_write(s,&(buf[tot]),n);

452 if (i <= 0)

453 {

454 s->s2->wnum=tot;

455 return(i);

456 }

457 if ((i == (int)n) \|\|

458 (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))

459 {

460 return(tot+i);

461 }

462

463 n-=i;

464 tot+=i;

465 }

466 }

467

468 static int write_pending(SSL s, const unsigned char buf, unsigned int len)

469 {

470 int i;

471

472 /* s->s2->wpend_len != 0 MUST be true. */

473

474 /* check that they have given us the same buffer to

475 * write */

476 if ((s->s2->wpend_tot > (int)len) \|\|

477 ((s->s2->wpend_buf != buf) &&

478 !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)))

479 {

480 SSLerr(SSL_F_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);

481 return(-1);

482 }

483

484 for (;;)

485 {

486 clear_sys_error();

487 if (s->wbio != NULL)

488 {

489 s->rwstate=SSL_WRITING;

490 i=BIO_write(s->wbio,

491 (char *)&(s->s2->write_ptr[s->s2->wpend_off]),

492 (unsigned int)s->s2->wpend_len);

493 }

494 else

495 {

496 SSLerr(SSL_F_WRITE_PENDING,SSL_R_WRITE_BIO_NOT_SET);

497 i= -1;

498 }

499 #ifdef PKT_DEBUG

500 if (s->debug & 0x01) sleep(1);

501 #endif

502 if (i == s->s2->wpend_len)

503 {

504 s->s2->wpend_len=0;

505 s->rwstate=SSL_NOTHING;

506 return(s->s2->wpend_ret);

507 }

508 else if (i <= 0)

509 return(i);

510 s->s2->wpend_off+=i;

511 s->s2->wpend_len-=i;

512 }

513 }

514

515 static int n_do_ssl_write(SSL s, const unsigned char buf, unsigned int len)

516 {

517 unsigned int j,k,olen,p,bs;

518 int mac_size;

519 register unsigned char *pp;

520

521 olen=len;

522

523 /* first check if there is data from an encryption waiting to

524 * be sent - it must be sent because the other end is waiting.

525 * This will happen with non-blocking IO. We print it and then

526 * return.

527 */

528 if (s->s2->wpend_len != 0) return(write_pending(s,buf,len));

529

530 /* set mac_size to mac size */

531 if (s->s2->clear_text)

532 mac_size=0;

533 else

534 {

535 mac_size=EVP_MD_CTX_size(s->write_hash);

536 if (mac_size < 0)

537 return -1;

538 }

539

540 /* lets set the pad p */

541 if (s->s2->clear_text)

542 {

543 if (len > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)

544 len=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;

545 p=0;

546 s->s2->three_byte_header=0;

547 /* len=len; */

548 }

549 else

550 {

551 bs=EVP_CIPHER_CTX_block_size(s->enc_read_ctx);

552 j=len+mac_size;

553 /* Two-byte headers allow for a larger record length than

554 * three-byte headers, but we can't use them if we need

555 * padding or if we have to set the escape bit. */

556 if ((j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) &&

557 (!s->s2->escape))

558 {

559 if (j > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER)

560 j=SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER;

561 /* set k to the max number of bytes with 2

562 * byte header */

563 k=j-(j%bs);

564 /* how many data bytes? */

565 len=k-mac_size;

566 s->s2->three_byte_header=0;

567 p=0;

568 }

569 else if ((bs <= 1) && (!s->s2->escape))

570 {

571 /* j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, thus

572 * j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER */

573 s->s2->three_byte_header=0;

574 p=0;

575 }

576 else /* we may have to use a 3 byte header */

577 {

578 /* If s->s2->escape is not set, then

579 * j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER, and thus

580 * j < SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER. */

581 p=(j%bs);

582 p=(p == 0)?0:(bs-p);

583 if (s->s2->escape)

584 {

585 s->s2->three_byte_header=1;

586 if (j > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)

587 j=SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER;

588 }

589 else

590 s->s2->three_byte_header=(p == 0)?0:1;

591 }

592 }

593

594 /* Now

595 * j <= SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER

596 * holds, and if s->s2->three_byte_header is set, then even

597 * j <= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER.

598 */

599

600 /* mac_size is the number of MAC bytes

601 * len is the number of data bytes we are going to send

602 * p is the number of padding bytes

603 * (if it is a two-byte header, then p == 0) */

604

605 s->s2->wlength=len;

606 s->s2->padding=p;

607 s->s2->mac_data= &(s->s2->wbuf[3]);

608 s->s2->wact_data= &(s->s2->wbuf[3+mac_size]);

609 /* we copy the data into s->s2->wbuf */

610 memcpy(s->s2->wact_data,buf,len);

611 if (p)

612 memset(&(s->s2->wact_data[len]),0,p); /* arbitrary padding */

613

614 if (!s->s2->clear_text)

615 {

616 s->s2->wact_data_length=len+p;

617 ssl2_mac(s,s->s2->mac_data,1);

618 s->s2->wlength+=p+mac_size;

619 ssl2_enc(s,1);

620 }

621

622 /* package up the header */

623 s->s2->wpend_len=s->s2->wlength;

624 if (s->s2->three_byte_header) /* 3 byte header */

625 {

626 pp=s->s2->mac_data;

627 pp-=3;

628 pp[0]=(s->s2->wlength>>8)&(THREE_BYTE_MASK>>8);

629 if (s->s2->escape) pp[0]\|=SEC_ESC_BIT;

630 pp[1]=s->s2->wlength&0xff;

631 pp[2]=s->s2->padding;

632 s->s2->wpend_len+=3;

633 }

634 else

635 {

636 pp=s->s2->mac_data;

637 pp-=2;

638 pp[0]=((s->s2->wlength>>8)&(TWO_BYTE_MASK>>8))\|TWO_BYTE_BIT;

639 pp[1]=s->s2->wlength&0xff;

640 s->s2->wpend_len+=2;

641 }

642 s->s2->write_ptr=pp;

643

644 INC32(s->s2->write_sequence); /* expect next number */

645

646 /* lets try to actually write the data */

647 s->s2->wpend_tot=olen;

648 s->s2->wpend_buf=buf;

649

650 s->s2->wpend_ret=len;

651

652 s->s2->wpend_off=0;

653 return(write_pending(s,buf,olen));

654 }

655

656 int ssl2_part_read(SSL *s, unsigned long f, int i)

657 {

658 unsigned char *p;

659 int j;

660

661 if (i < 0)

662 {

663 /* ssl2_return_error(s); */

664 /* for non-blocking io,

665 * this is not necessarily fatal */

666 return(i);

667 }

668 else

669 {

670 s->init_num+=i;

671

672 /* Check for error. While there are recoverable errors,

673 * this function is not called when those must be expected;

674 * any error detected here is fatal. */

675 if (s->init_num >= 3)

676 {

677 p=(unsigned char *)s->init_buf->data;

678 if (p[0] == SSL2_MT_ERROR)

679 {

680 j=(p[1]<<8)\|p[2];

681 SSLerr((int)f,ssl_mt_error(j));

682 s->init_num -= 3;

683 if (s->init_num > 0)

684 memmove(p, p+3, s->init_num);

685 }

686 }

687

688 /* If it's not an error message, we have some error anyway --

689 * the message was shorter than expected. This too is treated

690 * as fatal (at least if SSL_get_error is asked for its opinion) . */

691 return(0);

692 }

693 }

694

695 int ssl2_do_write(SSL *s)

696 {

697 int ret;

698

699 ret=ssl2_write(s,&s->init_buf->data[s->init_off],s->init_num);

700 if (ret == s->init_num)

701 {

702 if (s->msg_callback)

703 s->msg_callback(1, s->version, 0, s->init_buf->data, (si ze_t)(s->init_off + s->init_num), s, s->msg_callback_arg);

704 return(1);

705 }

706 if (ret < 0)

707 return(-1);

708 s->init_off+=ret;

709 s->init_num-=ret;

710 return(0);

711 }

712

713 static int ssl_mt_error(int n)

714 {

715 int ret;

716

717 switch (n)

718 {

719 case SSL2_PE_NO_CIPHER:

720 ret=SSL_R_PEER_ERROR_NO_CIPHER;

721 break;

722 case SSL2_PE_NO_CERTIFICATE:

723 ret=SSL_R_PEER_ERROR_NO_CERTIFICATE;

724 break;

725 case SSL2_PE_BAD_CERTIFICATE:

726 ret=SSL_R_PEER_ERROR_CERTIFICATE;

727 break;

728 case SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE:

729 ret=SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE;

730 break;

731 default:

732 ret=SSL_R_UNKNOWN_REMOTE_ERROR_TYPE;

733 break;

734 }

735 return(ret);

736 }

737 #else /* !OPENSSL_NO_SSL2 */

738

739 # if PEDANTIC

740 static void *dummy=&dummy;

741 # endif

742

743 #endif

OLD	NEW

« no previous file with comments | « openssl/ssl/s2_meth.c ('k') | openssl/ssl/s2_srvr.c » ('j') | no next file with comments »