openssl/crypto/pem/pvkfmt.c - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

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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

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1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

2 * project 2005.

3 */

4 /* ====================================================================

5 * Copyright (c) 2005 The OpenSSL Project. All rights reserved.

6 *

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

8 * modification, are permitted provided that the following conditions

9 * are met:

10 *

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

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

13 *

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

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

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

17 * distribution.

18 *

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

20 * software must display the following acknowledgment:

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

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

23 *

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

25 * endorse or promote products derived from this software without

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

27 * licensing@OpenSSL.org.

28 *

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

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

31 * permission of the OpenSSL Project.

32 *

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

34 * acknowledgment:

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

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

37 *

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

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

40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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

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

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

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

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

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

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

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

49 * OF THE POSSIBILITY OF SUCH DAMAGE.

50 * ====================================================================

51 *

52 * This product includes cryptographic software written by Eric Young

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

54 * Hudson (tjh@cryptsoft.com).

55 *

56 */

57

58 /* Support for PVK format keys and related structures (such a PUBLICKEYBLOB

59 * and PRIVATEKEYBLOB).

60 */

61

62 #include "cryptlib.h"

63 #include <openssl/pem.h>

64 #include <openssl/rand.h>

65 #include <openssl/bn.h>

66 #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)

67 #include <openssl/dsa.h>

68 #include <openssl/rsa.h>

69

70 /* Utility function: read a DWORD (4 byte unsigned integer) in little endian

71 * format

72 */

73

74 static unsigned int read_ledword(const unsigned char **in)

75 {

76 const unsigned char p = in;

77 unsigned int ret;

78 ret = *p++;

79 ret \|= (*p++ << 8);

80 ret \|= (*p++ << 16);

81 ret \|= (*p++ << 24);

82 *in = p;

83 return ret;

84 }

85

86 /* Read a BIGNUM in little endian format. The docs say that this should take up

87 * bitlen/8 bytes.

88 */

89

90 static int read_lebn(const unsigned char in, unsigned int nbyte, BIGNUM r)

91 {

92 const unsigned char *p;

93 unsigned char tmpbuf, q;

94 unsigned int i;

95 p = *in + nbyte - 1;

96 tmpbuf = OPENSSL_malloc(nbyte);

97 if (!tmpbuf)

98 return 0;

99 q = tmpbuf;

100 for (i = 0; i < nbyte; i++)

101 q++ = p--;

102 *r = BN_bin2bn(tmpbuf, nbyte, NULL);

103 OPENSSL_free(tmpbuf);

104 if (*r)

105 {

106 *in += nbyte;

107 return 1;

108 }

109 else

110 return 0;

111 }

112

113

114 /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */

115

116 #define MS_PUBLICKEYBLOB 0x6

117 #define MS_PRIVATEKEYBLOB 0x7

118 #define MS_RSA1MAGIC 0x31415352L

119 #define MS_RSA2MAGIC 0x32415352L

120 #define MS_DSS1MAGIC 0x31535344L

121 #define MS_DSS2MAGIC 0x32535344L

122

123 #define MS_KEYALG_RSA_KEYX 0xa400

124 #define MS_KEYALG_DSS_SIGN 0x2200

125

126 #define MS_KEYTYPE_KEYX 0x1

127 #define MS_KEYTYPE_SIGN 0x2

128

129 /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */

130 #define MS_PVKMAGIC 0xb0b5f11eL

131 /* Salt length for PVK files */

132 #define PVK_SALTLEN 0x10

133

134 static EVP_PKEY b2i_rsa(const unsigned char *in, unsigned int length,

135 unsigned int bitlen, int ispub);

136 static EVP_PKEY b2i_dss(const unsigned char *in, unsigned int length,

137 unsigned int bitlen, int ispub);

138

139 static int do_blob_header(const unsigned char **in, unsigned int length,

140 unsigned int pmagic, unsigned int pbitlen,

141 int pisdss, int pispub)

142 {

143 const unsigned char p = in;

144 if (length < 16)

145 return 0;

146 /* bType */

147 if (*p == MS_PUBLICKEYBLOB)

148 {

149 if (*pispub == 0)

150 {

151 PEMerr(PEM_F_DO_BLOB_HEADER,

152 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);

153 return 0;

154 }

155 *pispub = 1;

156 }

157 else if (*p == MS_PRIVATEKEYBLOB)

158 {

159 if (*pispub == 1)

160 {

161 PEMerr(PEM_F_DO_BLOB_HEADER,

162 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);

163 return 0;

164 }

165 *pispub = 0;

166 }

167 else

168 return 0;

169 p++;

170 /* Version */

171 if (*p++ != 0x2)

172 {

173 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);

174 return 0;

175 }

176 /* Ignore reserved, aiKeyAlg */

177 p+= 6;

178 *pmagic = read_ledword(&p);

179 *pbitlen = read_ledword(&p);

180 *pisdss = 0;

181 switch (*pmagic)

182 {

183

184 case MS_DSS1MAGIC:

185 *pisdss = 1;

186 case MS_RSA1MAGIC:

187 if (*pispub == 0)

188 {

189 PEMerr(PEM_F_DO_BLOB_HEADER,

190 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);

191 return 0;

192 }

193 break;

194

195 case MS_DSS2MAGIC:

196 *pisdss = 1;

197 case MS_RSA2MAGIC:

198 if (*pispub == 1)

199 {

200 PEMerr(PEM_F_DO_BLOB_HEADER,

201 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);

202 return 0;

203 }

204 break;

205

206 default:

207 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);

208 return -1;

209 }

210 *in = p;

211 return 1;

212 }

213

214 static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)

215 {

216 unsigned int nbyte, hnbyte;

217 nbyte = (bitlen + 7) >> 3;

218 hnbyte = (bitlen + 15) >> 4;

219 if (isdss)

220 {

221

222 /* Expected length: 20 for q + 3 components bitlen each + 24

223 * for seed structure.

224 */

225 if (ispub)

226 return 44 + 3 * nbyte;

227 /* Expected length: 20 for q, priv, 2 bitlen components + 24

228 * for seed structure.

229 */

230 else

231 return 64 + 2 * nbyte;

232 }

233 else

234 {

235 /* Expected length: 4 for 'e' + 'n' */

236 if (ispub)

237 return 4 + nbyte;

238 else

239 /* Expected length: 4 for 'e' and 7 other components.

240 * 2 components are bitlen size, 5 are bitlen/2

241 */

242 return 4 + 2nbyte + 5hnbyte;

243 }

244

245 }

246

247 static EVP_PKEY do_b2i(const unsigned char *in, unsigned int length,

248 int ispub)

249 {

250 const unsigned char p = in;

251 unsigned int bitlen, magic;

252 int isdss;

253 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0)

254 {

255 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);

256 return NULL;

257 }

258 length -= 16;

259 if (length < blob_length(bitlen, isdss, ispub))

260 {

261 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);

262 return NULL;

263 }

264 if (isdss)

265 return b2i_dss(&p, length, bitlen, ispub);

266 else

267 return b2i_rsa(&p, length, bitlen, ispub);

268 }

269

270 static EVP_PKEY do_b2i_bio(BIO in, int ispub)

271 {

272 const unsigned char *p;

273 unsigned char hdr_buf[16], *buf = NULL;

274 unsigned int bitlen, magic, length;

275 int isdss;

276 EVP_PKEY *ret = NULL;

277 if (BIO_read(in, hdr_buf, 16) != 16)

278 {

279 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);

280 return NULL;

281 }

282 p = hdr_buf;

283 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)

284 return NULL;

285

286 length = blob_length(bitlen, isdss, ispub);

287 buf = OPENSSL_malloc(length);

288 if (!buf)

289 {

290 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);

291 goto err;

292 }

293 p = buf;

294 if (BIO_read(in, buf, length) != (int)length)

295 {

296 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);

297 goto err;

298 }

299

300 if (isdss)

301 ret = b2i_dss(&p, length, bitlen, ispub);

302 else

303 ret = b2i_rsa(&p, length, bitlen, ispub);

304

305 err:

306 if (buf)

307 OPENSSL_free(buf);

308 return ret;

309 }

310

311 static EVP_PKEY b2i_dss(const unsigned char *in, unsigned int length,

312 unsigned int bitlen, int ispub)

313 {

314 const unsigned char p = in;

315 EVP_PKEY *ret = NULL;

316 DSA *dsa = NULL;

317 BN_CTX *ctx = NULL;

318 unsigned int nbyte;

319 nbyte = (bitlen + 7) >> 3;

320

321 dsa = DSA_new();

322 ret = EVP_PKEY_new();

323 if (!dsa \|\| !ret)

324 goto memerr;

325 if (!read_lebn(&p, nbyte, &dsa->p))

326 goto memerr;

327 if (!read_lebn(&p, 20, &dsa->q))

328 goto memerr;

329 if (!read_lebn(&p, nbyte, &dsa->g))

330 goto memerr;

331 if (ispub)

332 {

333 if (!read_lebn(&p, nbyte, &dsa->pub_key))

334 goto memerr;

335 }

336 else

337 {

338 if (!read_lebn(&p, 20, &dsa->priv_key))

339 goto memerr;

340 /* Calculate public key */

341 if (!(dsa->pub_key = BN_new()))

342 goto memerr;

343 if (!(ctx = BN_CTX_new()))

344 goto memerr;

345

346 if (!BN_mod_exp(dsa->pub_key, dsa->g,

347 dsa->priv_key, dsa->p, ctx))

348

349 goto memerr;

350 BN_CTX_free(ctx);

351 }

352

353 EVP_PKEY_set1_DSA(ret, dsa);

354 DSA_free(dsa);

355 *in = p;

356 return ret;

357

358 memerr:

359 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);

360 if (dsa)

361 DSA_free(dsa);

362 if (ret)

363 EVP_PKEY_free(ret);

364 if (ctx)

365 BN_CTX_free(ctx);

366 return NULL;

367 }

368

369 static EVP_PKEY b2i_rsa(const unsigned char *in, unsigned int length,

370 unsigned int bitlen, int ispub)

371

372 {

373 const unsigned char p = in;

374 EVP_PKEY *ret = NULL;

375 RSA *rsa = NULL;

376 unsigned int nbyte, hnbyte;

377 nbyte = (bitlen + 7) >> 3;

378 hnbyte = (bitlen + 15) >> 4;

379 rsa = RSA_new();

380 ret = EVP_PKEY_new();

381 if (!rsa \|\| !ret)

382 goto memerr;

383 rsa->e = BN_new();

384 if (!rsa->e)

385 goto memerr;

386 if (!BN_set_word(rsa->e, read_ledword(&p)))

387 goto memerr;

388 if (!read_lebn(&p, nbyte, &rsa->n))

389 goto memerr;

390 if (!ispub)

391 {

392 if (!read_lebn(&p, hnbyte, &rsa->p))

393 goto memerr;

394 if (!read_lebn(&p, hnbyte, &rsa->q))

395 goto memerr;

396 if (!read_lebn(&p, hnbyte, &rsa->dmp1))

397 goto memerr;

398 if (!read_lebn(&p, hnbyte, &rsa->dmq1))

399 goto memerr;

400 if (!read_lebn(&p, hnbyte, &rsa->iqmp))

401 goto memerr;

402 if (!read_lebn(&p, nbyte, &rsa->d))

403 goto memerr;

404 }

405

406 EVP_PKEY_set1_RSA(ret, rsa);

407 RSA_free(rsa);

408 *in = p;

409 return ret;

410 memerr:

411 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);

412 if (rsa)

413 RSA_free(rsa);

414 if (ret)

415 EVP_PKEY_free(ret);

416 return NULL;

417 }

418

419 EVP_PKEY b2i_PrivateKey(const unsigned char *in, long length)

420 {

421 return do_b2i(in, length, 0);

422 }

423

424 EVP_PKEY b2i_PublicKey(const unsigned char *in, long length)

425 {

426 return do_b2i(in, length, 1);

427 }

428

429

430 EVP_PKEY b2i_PrivateKey_bio(BIO in)

431 {

432 return do_b2i_bio(in, 0);

433 }

434

435 EVP_PKEY b2i_PublicKey_bio(BIO in)

436 {

437 return do_b2i_bio(in, 1);

438 }

439

440 static void write_ledword(unsigned char **out, unsigned int dw)

441 {

442 unsigned char p = out;

443 *p++ = dw & 0xff;

444 *p++ = (dw>>8) & 0xff;

445 *p++ = (dw>>16) & 0xff;

446 *p++ = (dw>>24) & 0xff;

447 *out = p;

448 }

449

450 static void write_lebn(unsigned char *out, const BIGNUM bn, int len)

451 {

452 int nb, i;

453 unsigned char p = out, *q, c;

454 nb = BN_num_bytes(bn);

455 BN_bn2bin(bn, p);

456 q = p + nb - 1;

457 /* In place byte order reversal */

458 for (i = 0; i < nb/2; i++)

459 {

460 c = *p;

461 p++ = q;

462 *q-- = c;

463 }

464 *out += nb;

465 /* Pad with zeroes if we have to */

466 if (len > 0)

467 {

468 len -= nb;

469 if (len > 0)

470 {

471 memset(*out, 0, len);

472 *out += len;

473 }

474 }

475 }

476

477

478 static int check_bitlen_rsa(RSA rsa, int ispub, unsigned int magic);

479 static int check_bitlen_dsa(DSA dsa, int ispub, unsigned int magic);

480

481 static void write_rsa(unsigned char *out, RSA rsa, int ispub);

482 static void write_dsa(unsigned char *out, DSA dsa, int ispub);

483

484 static int do_i2b(unsigned char *out, EVP_PKEY pk, int ispub)

485 {

486 unsigned char *p;

487 unsigned int bitlen, magic = 0, keyalg;

488 int outlen, noinc = 0;

489 if (pk->type == EVP_PKEY_DSA)

490 {

491 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);

492 keyalg = MS_KEYALG_DSS_SIGN;

493 }

494 else if (pk->type == EVP_PKEY_RSA)

495 {

496 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);

497 keyalg = MS_KEYALG_RSA_KEYX;

498 }

499 else

500 return -1;

501 if (bitlen == 0)

502 return -1;

503 outlen = 16 + blob_length(bitlen,

504 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);

505 if (out == NULL)

506 return outlen;

507 if (*out)

508 p = *out;

509 else

510 {

511 p = OPENSSL_malloc(outlen);

512 if (!p)

513 return -1;

514 *out = p;

515 noinc = 1;

516 }

517 if (ispub)

518 *p++ = MS_PUBLICKEYBLOB;

519 else

520 *p++ = MS_PRIVATEKEYBLOB;

521 *p++ = 0x2;

522 *p++ = 0;

523 *p++ = 0;

524 write_ledword(&p, keyalg);

525 write_ledword(&p, magic);

526 write_ledword(&p, bitlen);

527 if (keyalg == MS_KEYALG_DSS_SIGN)

528 write_dsa(&p, pk->pkey.dsa, ispub);

529 else

530 write_rsa(&p, pk->pkey.rsa, ispub);

531 if (!noinc)

532 *out += outlen;

533 return outlen;

534 }

535

536 static int do_i2b_bio(BIO out, EVP_PKEY pk, int ispub)

537 {

538 unsigned char *tmp = NULL;

539 int outlen, wrlen;

540 outlen = do_i2b(&tmp, pk, ispub);

541 if (outlen < 0)

542 return -1;

543 wrlen = BIO_write(out, tmp, outlen);

544 OPENSSL_free(tmp);

545 if (wrlen == outlen)

546 return outlen;

547 return -1;

548 }

549

550 static int check_bitlen_dsa(DSA dsa, int ispub, unsigned int pmagic)

551 {

552 int bitlen;

553 bitlen = BN_num_bits(dsa->p);

554 if ((bitlen & 7) \|\| (BN_num_bits(dsa->q) != 160)

555 \|\| (BN_num_bits(dsa->g) > bitlen))

556 goto badkey;

557 if (ispub)

558 {

559 if (BN_num_bits(dsa->pub_key) > bitlen)

560 goto badkey;

561 *pmagic = MS_DSS1MAGIC;

562 }

563 else

564 {

565 if (BN_num_bits(dsa->priv_key) > 160)

566 goto badkey;

567 *pmagic = MS_DSS2MAGIC;

568 }

569

570 return bitlen;

571 badkey:

572 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);

573 return 0;

574 }

575

576 static int check_bitlen_rsa(RSA rsa, int ispub, unsigned int pmagic)

577 {

578 int nbyte, hnbyte, bitlen;

579 if (BN_num_bits(rsa->e) > 32)

580 goto badkey;

581 bitlen = BN_num_bits(rsa->n);

582 nbyte = BN_num_bytes(rsa->n);

583 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;

584 if (ispub)

585 {

586 *pmagic = MS_RSA1MAGIC;

587 return bitlen;

588 }

589 else

590 {

591 *pmagic = MS_RSA2MAGIC;

592 /* For private key each component must fit within nbyte or

593 * hnbyte.

594 */

595 if (BN_num_bytes(rsa->d) > nbyte)

596 goto badkey;

597 if ((BN_num_bytes(rsa->iqmp) > hnbyte)

598 \|\| (BN_num_bytes(rsa->p) > hnbyte)

599 \|\| (BN_num_bytes(rsa->q) > hnbyte)

600 \|\| (BN_num_bytes(rsa->dmp1) > hnbyte)

601 \|\| (BN_num_bytes(rsa->dmq1) > hnbyte))

602 goto badkey;

603 }

604 return bitlen;

605 badkey:

606 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);

607 return 0;

608 }

609

610

611 static void write_rsa(unsigned char *out, RSA rsa, int ispub)

612 {

613 int nbyte, hnbyte;

614 nbyte = BN_num_bytes(rsa->n);

615 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;

616 write_lebn(out, rsa->e, 4);

617 write_lebn(out, rsa->n, -1);

618 if (ispub)

619 return;

620 write_lebn(out, rsa->p, hnbyte);

621 write_lebn(out, rsa->q, hnbyte);

622 write_lebn(out, rsa->dmp1, hnbyte);

623 write_lebn(out, rsa->dmq1, hnbyte);

624 write_lebn(out, rsa->iqmp, hnbyte);

625 write_lebn(out, rsa->d, nbyte);

626 }

627

628

629 static void write_dsa(unsigned char *out, DSA dsa, int ispub)

630 {

631 int nbyte;

632 nbyte = BN_num_bytes(dsa->p);

633 write_lebn(out, dsa->p, nbyte);

634 write_lebn(out, dsa->q, 20);

635 write_lebn(out, dsa->g, nbyte);

636 if (ispub)

637 write_lebn(out, dsa->pub_key, nbyte);

638 else

639 write_lebn(out, dsa->priv_key, 20);

640 /* Set "invalid" for seed structure values */

641 memset(*out, 0xff, 24);

642 *out += 24;

643 return;

644 }

645

646

647 int i2b_PrivateKey_bio(BIO out, EVP_PKEY pk)

648 {

649 return do_i2b_bio(out, pk, 0);

650 }

651

652 int i2b_PublicKey_bio(BIO out, EVP_PKEY pk)

653 {

654 return do_i2b_bio(out, pk, 1);

655 }

656

657 #ifndef OPENSSL_NO_RC4

658

659 static int do_PVK_header(const unsigned char **in, unsigned int length,

660 int skip_magic,

661 unsigned int psaltlen, unsigned int pkeylen)

662

663 {

664 const unsigned char p = in;

665 unsigned int pvk_magic, is_encrypted;

666 if (skip_magic)

667 {

668 if (length < 20)

669 {

670 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);

671 return 0;

672 }

673 length -= 20;

674 }

675 else

676 {

677 if (length < 24)

678 {

679 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);

680 return 0;

681 }

682 length -= 24;

683 pvk_magic = read_ledword(&p);

684 if (pvk_magic != MS_PVKMAGIC)

685 {

686 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);

687 return 0;

688 }

689 }

690 /* Skip reserved */

691 p += 4;

692 /keytype = /read_ledword(&p);

693 is_encrypted = read_ledword(&p);

694 *psaltlen = read_ledword(&p);

695 *pkeylen = read_ledword(&p);

696

697 if (is_encrypted && !*psaltlen)

698 {

699 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);

700 return 0;

701 }

702

703 *in = p;

704 return 1;

705 }

706

707 static int derive_pvk_key(unsigned char *key,

708 const unsigned char *salt, unsigned int saltlen,

709 const unsigned char *pass, int passlen)

710 {

711 EVP_MD_CTX mctx;

712 int rv = 1;

713 EVP_MD_CTX_init(&mctx);

714 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL)

715 \|\| !EVP_DigestUpdate(&mctx, salt, saltlen)

716 \|\| !EVP_DigestUpdate(&mctx, pass, passlen)

717 \|\| !EVP_DigestFinal_ex(&mctx, key, NULL))

718 rv = 0;

719

720 EVP_MD_CTX_cleanup(&mctx);

721 return rv;

722 }

723

724

725 static EVP_PKEY do_PVK_body(const unsigned char *in,

726 unsigned int saltlen, unsigned int keylen,

727 pem_password_cb cb, void u)

728 {

729 EVP_PKEY *ret = NULL;

730 const unsigned char p = in;

731 unsigned int magic;

732 unsigned char enctmp = NULL, q;

733 EVP_CIPHER_CTX cctx;

734 EVP_CIPHER_CTX_init(&cctx);

735 if (saltlen)

736 {

737 char psbuf[PEM_BUFSIZE];

738 unsigned char keybuf[20];

739 int enctmplen, inlen;

740 if (cb)

741 inlen=cb(psbuf,PEM_BUFSIZE,0,u);

742 else

743 inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);

744 if (inlen <= 0)

745 {

746 PEMerr(PEM_F_DO_PVK_BODY,PEM_R_BAD_PASSWORD_READ);

747 return NULL;

748 }

749 enctmp = OPENSSL_malloc(keylen + 8);

750 if (!enctmp)

751 {

752 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);

753 return NULL;

754 }

755 if (!derive_pvk_key(keybuf, p, saltlen,

756 (unsigned char *)psbuf, inlen))

757 return NULL;

758 p += saltlen;

759 /* Copy BLOBHEADER across, decrypt rest */

760 memcpy(enctmp, p, 8);

761 p += 8;

762 inlen = keylen - 8;

763 q = enctmp + 8;

764 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))

765 goto err;

766 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))

767 goto err;

768 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))

769 goto err;

770 magic = read_ledword((const unsigned char **)&q);

771 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)

772 {

773 q = enctmp + 8;

774 memset(keybuf + 5, 0, 11);

775 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,

776 NULL))

777 goto err;

778 OPENSSL_cleanse(keybuf, 20);

779 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))

780 goto err;

781 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,

782 &enctmplen))

783 goto err;

784 magic = read_ledword((const unsigned char **)&q);

785 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC)

786 {

787 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);

788 goto err;

789 }

790 }

791 else

792 OPENSSL_cleanse(keybuf, 20);

793 p = enctmp;

794 }

795

796 ret = b2i_PrivateKey(&p, keylen);

797 err:

798 EVP_CIPHER_CTX_cleanup(&cctx);

799 if (enctmp && saltlen)

800 OPENSSL_free(enctmp);

801 return ret;

802 }

803

804

805 EVP_PKEY b2i_PVK_bio(BIO in, pem_password_cb cb, void u)

806 {

807 unsigned char pvk_hdr[24], *buf = NULL;

808 const unsigned char *p;

809 int buflen;

810 EVP_PKEY *ret = NULL;

811 unsigned int saltlen, keylen;

812 if (BIO_read(in, pvk_hdr, 24) != 24)

813 {

814 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);

815 return NULL;

816 }

817 p = pvk_hdr;

818

819 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))

820 return 0;

821 buflen = (int) keylen + saltlen;

822 buf = OPENSSL_malloc(buflen);

823 if (!buf)

824 {

825 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);

826 return 0;

827 }

828 p = buf;

829 if (BIO_read(in, buf, buflen) != buflen)

830 {

831 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);

832 goto err;

833 }

834 ret = do_PVK_body(&p, saltlen, keylen, cb, u);

835

836 err:

837 if (buf)

838 {

839 OPENSSL_cleanse(buf, buflen);

840 OPENSSL_free(buf);

841 }

842 return ret;

843 }

844

845

846

847 static int i2b_PVK(unsigned char *out, EVP_PKEYpk, int enclevel,

848 pem_password_cb cb, void u)

849 {

850 int outlen = 24, pklen;

851 unsigned char p, salt = NULL;

852 EVP_CIPHER_CTX cctx;

853 EVP_CIPHER_CTX_init(&cctx);

854 if (enclevel)

855 outlen += PVK_SALTLEN;

856 pklen = do_i2b(NULL, pk, 0);

857 if (pklen < 0)

858 return -1;

859 outlen += pklen;

860 if (!out)

861 return outlen;

862 if (*out)

863 p = *out;

864 else

865 {

866 p = OPENSSL_malloc(outlen);

867 if (!p)

868 {

869 PEMerr(PEM_F_I2B_PVK,ERR_R_MALLOC_FAILURE);

870 return -1;

871 }

872 *out = p;

873 }

874

875 write_ledword(&p, MS_PVKMAGIC);

876 write_ledword(&p, 0);

877 if (pk->type == EVP_PKEY_DSA)

878 write_ledword(&p, MS_KEYTYPE_SIGN);

879 else

880 write_ledword(&p, MS_KEYTYPE_KEYX);

881 write_ledword(&p, enclevel ? 1 : 0);

882 write_ledword(&p, enclevel ? PVK_SALTLEN: 0);

883 write_ledword(&p, pklen);

884 if (enclevel)

885 {

886 if (RAND_bytes(p, PVK_SALTLEN) <= 0)

887 goto error;

888 salt = p;

889 p += PVK_SALTLEN;

890 }

891 do_i2b(&p, pk, 0);

892 if (enclevel == 0)

893 return outlen;

894 else

895 {

896 char psbuf[PEM_BUFSIZE];

897 unsigned char keybuf[20];

898 int enctmplen, inlen;

899 if (cb)

900 inlen=cb(psbuf,PEM_BUFSIZE,1,u);

901 else

902 inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,1,u);

903 if (inlen <= 0)

904 {

905 PEMerr(PEM_F_I2B_PVK,PEM_R_BAD_PASSWORD_READ);

906 goto error;

907 }

908 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,

909 (unsigned char *)psbuf, inlen))

910 goto error;

911 if (enclevel == 1)

912 memset(keybuf + 5, 0, 11);

913 p = salt + PVK_SALTLEN + 8;

914 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))

915 goto error;

916 OPENSSL_cleanse(keybuf, 20);

917 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))

918 goto error;

919 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))

920 goto error;

921 }

922 EVP_CIPHER_CTX_cleanup(&cctx);

923 return outlen;

924

925 error:

926 EVP_CIPHER_CTX_cleanup(&cctx);

927 return -1;

928 }

929

930 int i2b_PVK_bio(BIO out, EVP_PKEY pk, int enclevel,

931 pem_password_cb cb, void u)

932 {

933 unsigned char *tmp = NULL;

934 int outlen, wrlen;

935 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);

936 if (outlen < 0)

937 return -1;

938 wrlen = BIO_write(out, tmp, outlen);

939 OPENSSL_free(tmp);

940 if (wrlen == outlen)

941 {

942 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);

943 return outlen;

944 }

945 return -1;

946 }

947

948 #endif

949

950 #endif

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