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authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/pem/pvkfmt.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
openbsd-libressl-v2.1.5.tar.bz2
openbsd-libressl-v2.1.5.zip
This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libcrypto/pem/pvkfmt.c')
-rw-r--r--src/lib/libcrypto/pem/pvkfmt.c933
1 files changed, 0 insertions, 933 deletions
diff --git a/src/lib/libcrypto/pem/pvkfmt.c b/src/lib/libcrypto/pem/pvkfmt.c
deleted file mode 100644
index 2009c9db80..0000000000
--- a/src/lib/libcrypto/pem/pvkfmt.c
+++ /dev/null
@@ -1,933 +0,0 @@
1/* $OpenBSD: pvkfmt.c,v 1.12 2014/10/22 13:02:04 jsing Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2005.
4 */
5/* ====================================================================
6 * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59/* Support for PVK format keys and related structures (such a PUBLICKEYBLOB
60 * and PRIVATEKEYBLOB).
61 */
62
63#include <stdlib.h>
64#include <string.h>
65
66#include <openssl/opensslconf.h>
67
68#include <openssl/bn.h>
69#include <openssl/err.h>
70#include <openssl/pem.h>
71
72#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
73#include <openssl/dsa.h>
74#include <openssl/rsa.h>
75
76/* Utility function: read a DWORD (4 byte unsigned integer) in little endian
77 * format
78 */
79
80static unsigned int
81read_ledword(const unsigned char **in)
82{
83 const unsigned char *p = *in;
84 unsigned int ret;
85
86 ret = *p++;
87 ret |= (*p++ << 8);
88 ret |= (*p++ << 16);
89 ret |= (*p++ << 24);
90 *in = p;
91 return ret;
92}
93
94/* Read a BIGNUM in little endian format. The docs say that this should take up
95 * bitlen/8 bytes.
96 */
97
98static int
99read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
100{
101 const unsigned char *p;
102 unsigned char *tmpbuf, *q;
103 unsigned int i;
104
105 p = *in + nbyte - 1;
106 tmpbuf = malloc(nbyte);
107 if (!tmpbuf)
108 return 0;
109 q = tmpbuf;
110 for (i = 0; i < nbyte; i++)
111 *q++ = *p--;
112 *r = BN_bin2bn(tmpbuf, nbyte, NULL);
113 free(tmpbuf);
114 if (*r) {
115 *in += nbyte;
116 return 1;
117 } else
118 return 0;
119}
120
121
122/* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
123
124#define MS_PUBLICKEYBLOB 0x6
125#define MS_PRIVATEKEYBLOB 0x7
126#define MS_RSA1MAGIC 0x31415352L
127#define MS_RSA2MAGIC 0x32415352L
128#define MS_DSS1MAGIC 0x31535344L
129#define MS_DSS2MAGIC 0x32535344L
130
131#define MS_KEYALG_RSA_KEYX 0xa400
132#define MS_KEYALG_DSS_SIGN 0x2200
133
134#define MS_KEYTYPE_KEYX 0x1
135#define MS_KEYTYPE_SIGN 0x2
136
137/* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
138#define MS_PVKMAGIC 0xb0b5f11eL
139/* Salt length for PVK files */
140#define PVK_SALTLEN 0x10
141
142static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length,
143 unsigned int bitlen, int ispub);
144static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length,
145 unsigned int bitlen, int ispub);
146
147static int
148do_blob_header(const unsigned char **in, unsigned int length,
149 unsigned int *pmagic, unsigned int *pbitlen, int *pisdss, int *pispub)
150{
151 const unsigned char *p = *in;
152
153 if (length < 16)
154 return 0;
155 /* bType */
156 if (*p == MS_PUBLICKEYBLOB) {
157 if (*pispub == 0) {
158 PEMerr(PEM_F_DO_BLOB_HEADER,
159 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
160 return 0;
161 }
162 *pispub = 1;
163 } else if (*p == MS_PRIVATEKEYBLOB) {
164 if (*pispub == 1) {
165 PEMerr(PEM_F_DO_BLOB_HEADER,
166 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
167 return 0;
168 }
169 *pispub = 0;
170 } else
171 return 0;
172 p++;
173 /* Version */
174 if (*p++ != 0x2) {
175 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
176 return 0;
177 }
178 /* Ignore reserved, aiKeyAlg */
179 p += 6;
180 *pmagic = read_ledword(&p);
181 *pbitlen = read_ledword(&p);
182 *pisdss = 0;
183 switch (*pmagic) {
184
185 case MS_DSS1MAGIC:
186 *pisdss = 1;
187 case MS_RSA1MAGIC:
188 if (*pispub == 0) {
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 PEMerr(PEM_F_DO_BLOB_HEADER,
200 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
201 return 0;
202 }
203 break;
204
205 default:
206 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
207 return -1;
208 }
209 *in = p;
210 return 1;
211}
212
213static unsigned int
214blob_length(unsigned bitlen, int isdss, int ispub)
215{
216 unsigned int nbyte, hnbyte;
217
218 nbyte = (bitlen + 7) >> 3;
219 hnbyte = (bitlen + 15) >> 4;
220 if (isdss) {
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 } else {
233 /* Expected length: 4 for 'e' + 'n' */
234 if (ispub)
235 return 4 + nbyte;
236 else
237 /* Expected length: 4 for 'e' and 7 other components.
238 * 2 components are bitlen size, 5 are bitlen/2
239 */
240 return 4 + 2*nbyte + 5*hnbyte;
241 }
242
243}
244
245static EVP_PKEY *
246do_b2i(const unsigned char **in, unsigned int length, int ispub)
247{
248 const unsigned char *p = *in;
249 unsigned int bitlen, magic;
250 int isdss;
251
252 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
253 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
254 return NULL;
255 }
256 length -= 16;
257 if (length < blob_length(bitlen, isdss, ispub)) {
258 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
259 return NULL;
260 }
261 if (isdss)
262 return b2i_dss(&p, length, bitlen, ispub);
263 else
264 return b2i_rsa(&p, length, bitlen, ispub);
265}
266
267static EVP_PKEY *
268do_b2i_bio(BIO *in, int ispub)
269{
270 const unsigned char *p;
271 unsigned char hdr_buf[16], *buf = NULL;
272 unsigned int bitlen, magic, length;
273 int isdss;
274 EVP_PKEY *ret = NULL;
275
276 if (BIO_read(in, hdr_buf, 16) != 16) {
277 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
278 return NULL;
279 }
280 p = hdr_buf;
281 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
282 return NULL;
283
284 length = blob_length(bitlen, isdss, ispub);
285 buf = malloc(length);
286 if (!buf) {
287 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
288 goto err;
289 }
290 p = buf;
291 if (BIO_read(in, buf, length) != (int)length) {
292 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
293 goto err;
294 }
295
296 if (isdss)
297 ret = b2i_dss(&p, length, bitlen, ispub);
298 else
299 ret = b2i_rsa(&p, length, bitlen, ispub);
300
301err:
302 free(buf);
303 return ret;
304}
305
306static EVP_PKEY *
307b2i_dss(const unsigned char **in, unsigned int length, unsigned int bitlen,
308 int ispub)
309{
310 const unsigned char *p = *in;
311 EVP_PKEY *ret = NULL;
312 DSA *dsa = NULL;
313 BN_CTX *ctx = NULL;
314 unsigned int nbyte;
315
316 nbyte = (bitlen + 7) >> 3;
317
318 dsa = DSA_new();
319 ret = EVP_PKEY_new();
320 if (!dsa || !ret)
321 goto memerr;
322 if (!read_lebn(&p, nbyte, &dsa->p))
323 goto memerr;
324 if (!read_lebn(&p, 20, &dsa->q))
325 goto memerr;
326 if (!read_lebn(&p, nbyte, &dsa->g))
327 goto memerr;
328 if (ispub) {
329 if (!read_lebn(&p, nbyte, &dsa->pub_key))
330 goto memerr;
331 } else {
332 if (!read_lebn(&p, 20, &dsa->priv_key))
333 goto memerr;
334 /* Calculate public key */
335 if (!(dsa->pub_key = BN_new()))
336 goto memerr;
337 if (!(ctx = BN_CTX_new()))
338 goto memerr;
339 if (!BN_mod_exp(dsa->pub_key, dsa->g,
340 dsa->priv_key, dsa->p, ctx))
341 goto memerr;
342 BN_CTX_free(ctx);
343 }
344
345 EVP_PKEY_set1_DSA(ret, dsa);
346 DSA_free(dsa);
347 *in = p;
348 return ret;
349
350memerr:
351 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
352 DSA_free(dsa);
353 EVP_PKEY_free(ret);
354 BN_CTX_free(ctx);
355 return NULL;
356}
357
358static EVP_PKEY *
359b2i_rsa(const unsigned char **in, unsigned int length, unsigned int bitlen,
360 int ispub)
361{
362 const unsigned char *p = *in;
363 EVP_PKEY *ret = NULL;
364 RSA *rsa = NULL;
365 unsigned int nbyte, hnbyte;
366
367 nbyte = (bitlen + 7) >> 3;
368 hnbyte = (bitlen + 15) >> 4;
369 rsa = RSA_new();
370 ret = EVP_PKEY_new();
371 if (!rsa || !ret)
372 goto memerr;
373 rsa->e = BN_new();
374 if (!rsa->e)
375 goto memerr;
376 if (!BN_set_word(rsa->e, read_ledword(&p)))
377 goto memerr;
378 if (!read_lebn(&p, nbyte, &rsa->n))
379 goto memerr;
380 if (!ispub) {
381 if (!read_lebn(&p, hnbyte, &rsa->p))
382 goto memerr;
383 if (!read_lebn(&p, hnbyte, &rsa->q))
384 goto memerr;
385 if (!read_lebn(&p, hnbyte, &rsa->dmp1))
386 goto memerr;
387 if (!read_lebn(&p, hnbyte, &rsa->dmq1))
388 goto memerr;
389 if (!read_lebn(&p, hnbyte, &rsa->iqmp))
390 goto memerr;
391 if (!read_lebn(&p, nbyte, &rsa->d))
392 goto memerr;
393 }
394
395 EVP_PKEY_set1_RSA(ret, rsa);
396 RSA_free(rsa);
397 *in = p;
398 return ret;
399
400memerr:
401 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
402 RSA_free(rsa);
403 EVP_PKEY_free(ret);
404 return NULL;
405}
406
407EVP_PKEY *
408b2i_PrivateKey(const unsigned char **in, long length)
409{
410 return do_b2i(in, length, 0);
411}
412
413EVP_PKEY *
414b2i_PublicKey(const unsigned char **in, long length)
415{
416 return do_b2i(in, length, 1);
417}
418
419EVP_PKEY *
420b2i_PrivateKey_bio(BIO *in)
421{
422 return do_b2i_bio(in, 0);
423}
424
425EVP_PKEY *
426b2i_PublicKey_bio(BIO *in)
427{
428 return do_b2i_bio(in, 1);
429}
430
431static void
432write_ledword(unsigned char **out, unsigned int dw)
433{
434 unsigned char *p = *out;
435
436 *p++ = dw & 0xff;
437 *p++ = (dw >> 8) & 0xff;
438 *p++ = (dw >> 16) & 0xff;
439 *p++ = (dw >> 24) & 0xff;
440 *out = p;
441}
442
443static void
444write_lebn(unsigned char **out, const BIGNUM *bn, int len)
445{
446 int nb, i;
447 unsigned char *p = *out, *q, c;
448
449 nb = BN_num_bytes(bn);
450 BN_bn2bin(bn, p);
451 q = p + nb - 1;
452 /* In place byte order reversal */
453 for (i = 0; i < nb / 2; i++) {
454 c = *p;
455 *p++ = *q;
456 *q-- = c;
457 }
458 *out += nb;
459 /* Pad with zeroes if we have to */
460 if (len > 0) {
461 len -= nb;
462 if (len > 0) {
463 memset(*out, 0, len);
464 *out += len;
465 }
466 }
467}
468
469
470static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
471static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
472
473static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
474static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
475
476static int
477do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
478{
479 unsigned char *p;
480 unsigned int bitlen, magic = 0, keyalg;
481 int outlen, noinc = 0;
482
483 if (pk->type == EVP_PKEY_DSA) {
484 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
485 keyalg = MS_KEYALG_DSS_SIGN;
486 } else if (pk->type == EVP_PKEY_RSA) {
487 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
488 keyalg = MS_KEYALG_RSA_KEYX;
489 } else
490 return -1;
491 if (bitlen == 0)
492 return -1;
493 outlen = 16 + blob_length(bitlen,
494 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
495 if (out == NULL)
496 return outlen;
497 if (*out)
498 p = *out;
499 else {
500 p = malloc(outlen);
501 if (!p)
502 return -1;
503 *out = p;
504 noinc = 1;
505 }
506 if (ispub)
507 *p++ = MS_PUBLICKEYBLOB;
508 else
509 *p++ = MS_PRIVATEKEYBLOB;
510 *p++ = 0x2;
511 *p++ = 0;
512 *p++ = 0;
513 write_ledword(&p, keyalg);
514 write_ledword(&p, magic);
515 write_ledword(&p, bitlen);
516 if (keyalg == MS_KEYALG_DSS_SIGN)
517 write_dsa(&p, pk->pkey.dsa, ispub);
518 else
519 write_rsa(&p, pk->pkey.rsa, ispub);
520 if (!noinc)
521 *out += outlen;
522 return outlen;
523}
524
525static int
526do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
527{
528 unsigned char *tmp = NULL;
529 int outlen, wrlen;
530
531 outlen = do_i2b(&tmp, pk, ispub);
532 if (outlen < 0)
533 return -1;
534 wrlen = BIO_write(out, tmp, outlen);
535 free(tmp);
536 if (wrlen == outlen)
537 return outlen;
538 return -1;
539}
540
541static int
542check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
543{
544 int bitlen;
545
546 bitlen = BN_num_bits(dsa->p);
547 if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) ||
548 (BN_num_bits(dsa->g) > bitlen))
549 goto badkey;
550 if (ispub) {
551 if (BN_num_bits(dsa->pub_key) > bitlen)
552 goto badkey;
553 *pmagic = MS_DSS1MAGIC;
554 } else {
555 if (BN_num_bits(dsa->priv_key) > 160)
556 goto badkey;
557 *pmagic = MS_DSS2MAGIC;
558 }
559
560 return bitlen;
561
562badkey:
563 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
564 return 0;
565}
566
567static int
568check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
569{
570 int nbyte, hnbyte, bitlen;
571
572 if (BN_num_bits(rsa->e) > 32)
573 goto badkey;
574 bitlen = BN_num_bits(rsa->n);
575 nbyte = BN_num_bytes(rsa->n);
576 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
577 if (ispub) {
578 *pmagic = MS_RSA1MAGIC;
579 return bitlen;
580 } else {
581 *pmagic = MS_RSA2MAGIC;
582 /* For private key each component must fit within nbyte or
583 * hnbyte.
584 */
585 if (BN_num_bytes(rsa->d) > nbyte)
586 goto badkey;
587 if ((BN_num_bytes(rsa->iqmp) > hnbyte) ||
588 (BN_num_bytes(rsa->p) > hnbyte) ||
589 (BN_num_bytes(rsa->q) > hnbyte) ||
590 (BN_num_bytes(rsa->dmp1) > hnbyte) ||
591 (BN_num_bytes(rsa->dmq1) > hnbyte))
592 goto badkey;
593 }
594 return bitlen;
595
596badkey:
597 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
598 return 0;
599}
600
601static void
602write_rsa(unsigned char **out, RSA *rsa, int ispub)
603{
604 int nbyte, hnbyte;
605
606 nbyte = BN_num_bytes(rsa->n);
607 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
608 write_lebn(out, rsa->e, 4);
609 write_lebn(out, rsa->n, -1);
610 if (ispub)
611 return;
612 write_lebn(out, rsa->p, hnbyte);
613 write_lebn(out, rsa->q, hnbyte);
614 write_lebn(out, rsa->dmp1, hnbyte);
615 write_lebn(out, rsa->dmq1, hnbyte);
616 write_lebn(out, rsa->iqmp, hnbyte);
617 write_lebn(out, rsa->d, nbyte);
618}
619
620static void
621write_dsa(unsigned char **out, DSA *dsa, int ispub)
622{
623 int nbyte;
624
625 nbyte = BN_num_bytes(dsa->p);
626 write_lebn(out, dsa->p, nbyte);
627 write_lebn(out, dsa->q, 20);
628 write_lebn(out, dsa->g, nbyte);
629 if (ispub)
630 write_lebn(out, dsa->pub_key, nbyte);
631 else
632 write_lebn(out, dsa->priv_key, 20);
633 /* Set "invalid" for seed structure values */
634 memset(*out, 0xff, 24);
635 *out += 24;
636 return;
637}
638
639int
640i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
641{
642 return do_i2b_bio(out, pk, 0);
643}
644
645int
646i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
647{
648 return do_i2b_bio(out, pk, 1);
649}
650
651#ifndef OPENSSL_NO_RC4
652
653static int
654do_PVK_header(const unsigned char **in, unsigned int length, int skip_magic,
655 unsigned int *psaltlen, unsigned int *pkeylen)
656{
657 const unsigned char *p = *in;
658 unsigned int pvk_magic, is_encrypted;
659
660 if (skip_magic) {
661 if (length < 20) {
662 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
663 return 0;
664 }
665 length -= 20;
666 } else {
667 if (length < 24) {
668 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
669 return 0;
670 }
671 length -= 24;
672 pvk_magic = read_ledword(&p);
673 if (pvk_magic != MS_PVKMAGIC) {
674 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
675 return 0;
676 }
677 }
678 /* Skip reserved */
679 p += 4;
680 /*keytype = */read_ledword(&p);
681 is_encrypted = read_ledword(&p);
682 *psaltlen = read_ledword(&p);
683 *pkeylen = read_ledword(&p);
684
685 if (is_encrypted && !*psaltlen) {
686 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
687 return 0;
688 }
689
690 *in = p;
691 return 1;
692}
693
694static int
695derive_pvk_key(unsigned char *key, const unsigned char *salt,
696 unsigned int saltlen, const unsigned char *pass, int passlen)
697{
698 EVP_MD_CTX mctx;
699 int rv = 1;
700
701 EVP_MD_CTX_init(&mctx);
702 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL) ||
703 !EVP_DigestUpdate(&mctx, salt, saltlen) ||
704 !EVP_DigestUpdate(&mctx, pass, passlen) ||
705 !EVP_DigestFinal_ex(&mctx, key, NULL))
706 rv = 0;
707
708 EVP_MD_CTX_cleanup(&mctx);
709 return rv;
710}
711
712static EVP_PKEY *
713do_PVK_body(const unsigned char **in, unsigned int saltlen,
714 unsigned int keylen, pem_password_cb *cb, void *u)
715{
716 EVP_PKEY *ret = NULL;
717 const unsigned char *p = *in;
718 unsigned int magic;
719 unsigned char *enctmp = NULL, *q;
720 EVP_CIPHER_CTX cctx;
721
722 EVP_CIPHER_CTX_init(&cctx);
723 if (saltlen) {
724 char psbuf[PEM_BUFSIZE];
725 unsigned char keybuf[20];
726 int enctmplen, inlen;
727
728 if (cb)
729 inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
730 else
731 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
732 if (inlen <= 0) {
733 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
734 return NULL;
735 }
736 enctmp = malloc(keylen + 8);
737 if (!enctmp) {
738 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
739 return NULL;
740 }
741 if (!derive_pvk_key(keybuf, p, saltlen, (unsigned char *)psbuf,
742 inlen)) {
743 free(enctmp);
744 return NULL;
745 }
746 p += saltlen;
747 /* Copy BLOBHEADER across, decrypt rest */
748 memcpy(enctmp, p, 8);
749 p += 8;
750 if (keylen < 8) {
751 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
752 free(enctmp);
753 return NULL;
754 }
755 inlen = keylen - 8;
756 q = enctmp + 8;
757 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
758 goto err;
759 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
760 goto err;
761 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
762 goto err;
763 magic = read_ledword((const unsigned char **)&q);
764 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
765 q = enctmp + 8;
766 memset(keybuf + 5, 0, 11);
767 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,
768 NULL))
769 goto err;
770 OPENSSL_cleanse(keybuf, 20);
771 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
772 goto err;
773 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,
774 &enctmplen))
775 goto err;
776 magic = read_ledword((const unsigned char **)&q);
777 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
778 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
779 goto err;
780 }
781 } else
782 OPENSSL_cleanse(keybuf, 20);
783 p = enctmp;
784 }
785
786 ret = b2i_PrivateKey(&p, keylen);
787
788err:
789 EVP_CIPHER_CTX_cleanup(&cctx);
790 if (enctmp && saltlen)
791 free(enctmp);
792 return ret;
793}
794
795
796EVP_PKEY *
797b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
798{
799 unsigned char pvk_hdr[24], *buf = NULL;
800 const unsigned char *p;
801 int buflen;
802 EVP_PKEY *ret = NULL;
803 unsigned int saltlen, keylen;
804
805 if (BIO_read(in, pvk_hdr, 24) != 24) {
806 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
807 return NULL;
808 }
809 p = pvk_hdr;
810
811 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
812 return 0;
813 buflen = (int) keylen + saltlen;
814 buf = malloc(buflen);
815 if (!buf) {
816 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
817 return 0;
818 }
819 p = buf;
820 if (BIO_read(in, buf, buflen) != buflen) {
821 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
822 goto err;
823 }
824 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
825
826err:
827 if (buf) {
828 OPENSSL_cleanse(buf, buflen);
829 free(buf);
830 }
831 return ret;
832}
833
834static int
835i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, pem_password_cb *cb,
836 void *u)
837{
838 int outlen = 24, pklen;
839 unsigned char *p, *salt = NULL;
840 EVP_CIPHER_CTX cctx;
841
842 EVP_CIPHER_CTX_init(&cctx);
843 if (enclevel)
844 outlen += PVK_SALTLEN;
845 pklen = do_i2b(NULL, pk, 0);
846 if (pklen < 0)
847 return -1;
848 outlen += pklen;
849 if (!out)
850 return outlen;
851 if (*out)
852 p = *out;
853 else {
854 p = malloc(outlen);
855 if (!p) {
856 PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
857 return -1;
858 }
859 *out = p;
860 }
861
862 write_ledword(&p, MS_PVKMAGIC);
863 write_ledword(&p, 0);
864 if (pk->type == EVP_PKEY_DSA)
865 write_ledword(&p, MS_KEYTYPE_SIGN);
866 else
867 write_ledword(&p, MS_KEYTYPE_KEYX);
868 write_ledword(&p, enclevel ? 1 : 0);
869 write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
870 write_ledword(&p, pklen);
871 if (enclevel) {
872 arc4random_buf(p, PVK_SALTLEN);
873 salt = p;
874 p += PVK_SALTLEN;
875 }
876 do_i2b(&p, pk, 0);
877 if (enclevel == 0)
878 return outlen;
879 else {
880 char psbuf[PEM_BUFSIZE];
881 unsigned char keybuf[20];
882 int enctmplen, inlen;
883 if (cb)
884 inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
885 else
886 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
887 if (inlen <= 0) {
888 PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
889 goto error;
890 }
891 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
892 (unsigned char *)psbuf, inlen))
893 goto error;
894 if (enclevel == 1)
895 memset(keybuf + 5, 0, 11);
896 p = salt + PVK_SALTLEN + 8;
897 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
898 goto error;
899 OPENSSL_cleanse(keybuf, 20);
900 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
901 goto error;
902 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
903 goto error;
904 }
905 EVP_CIPHER_CTX_cleanup(&cctx);
906 return outlen;
907
908error:
909 EVP_CIPHER_CTX_cleanup(&cctx);
910 return -1;
911}
912
913int
914i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, pem_password_cb *cb, void *u)
915{
916 unsigned char *tmp = NULL;
917 int outlen, wrlen;
918
919 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
920 if (outlen < 0)
921 return -1;
922 wrlen = BIO_write(out, tmp, outlen);
923 free(tmp);
924 if (wrlen == outlen) {
925 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
926 return outlen;
927 }
928 return -1;
929}
930
931#endif
932
933#endif
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