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-rw-r--r--src/lib/libcrypto/pem/pvkfmt.c939
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diff --git a/src/lib/libcrypto/pem/pvkfmt.c b/src/lib/libcrypto/pem/pvkfmt.c
deleted file mode 100644
index 7a9045396c..0000000000
--- a/src/lib/libcrypto/pem/pvkfmt.c
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1/* $OpenBSD: pvkfmt.c,v 1.16 2016/03/02 14:28:14 beck 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 if (*pbitlen > 65536) {
183 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_INCONSISTENT_HEADER);
184 return 0;
185 }
186 *pisdss = 0;
187 switch (*pmagic) {
188
189 case MS_DSS1MAGIC:
190 *pisdss = 1;
191 case MS_RSA1MAGIC:
192 if (*pispub == 0) {
193 PEMerr(PEM_F_DO_BLOB_HEADER,
194 PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
195 return 0;
196 }
197 break;
198
199 case MS_DSS2MAGIC:
200 *pisdss = 1;
201 case MS_RSA2MAGIC:
202 if (*pispub == 1) {
203 PEMerr(PEM_F_DO_BLOB_HEADER,
204 PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
205 return 0;
206 }
207 break;
208
209 default:
210 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
211 return -1;
212 }
213 *in = p;
214 return 1;
215}
216
217static unsigned int
218blob_length(unsigned bitlen, int isdss, int ispub)
219{
220 unsigned int nbyte, hnbyte;
221
222 nbyte = (bitlen + 7) >> 3;
223 hnbyte = (bitlen + 15) >> 4;
224 if (isdss) {
225
226 /* Expected length: 20 for q + 3 components bitlen each + 24
227 * for seed structure.
228 */
229 if (ispub)
230 return 44 + 3 * nbyte;
231 /* Expected length: 20 for q, priv, 2 bitlen components + 24
232 * for seed structure.
233 */
234 else
235 return 64 + 2 * nbyte;
236 } else {
237 /* Expected length: 4 for 'e' + 'n' */
238 if (ispub)
239 return 4 + nbyte;
240 else
241 /* Expected length: 4 for 'e' and 7 other components.
242 * 2 components are bitlen size, 5 are bitlen/2
243 */
244 return 4 + 2*nbyte + 5*hnbyte;
245 }
246
247}
248
249static EVP_PKEY *
250do_b2i(const unsigned char **in, unsigned int length, int ispub)
251{
252 const unsigned char *p = *in;
253 unsigned int bitlen, magic;
254 int isdss;
255
256 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
257 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
258 return NULL;
259 }
260 length -= 16;
261 if (length < blob_length(bitlen, isdss, ispub)) {
262 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
263 return NULL;
264 }
265 if (isdss)
266 return b2i_dss(&p, length, bitlen, ispub);
267 else
268 return b2i_rsa(&p, length, bitlen, ispub);
269}
270
271static EVP_PKEY *
272do_b2i_bio(BIO *in, int ispub)
273{
274 const unsigned char *p;
275 unsigned char hdr_buf[16], *buf = NULL;
276 unsigned int bitlen, magic, length;
277 int isdss;
278 EVP_PKEY *ret = NULL;
279
280 if (BIO_read(in, hdr_buf, 16) != 16) {
281 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
282 return NULL;
283 }
284 p = hdr_buf;
285 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
286 return NULL;
287
288 length = blob_length(bitlen, isdss, ispub);
289 buf = malloc(length);
290 if (!buf) {
291 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
292 goto err;
293 }
294 p = buf;
295 if (BIO_read(in, buf, length) != (int)length) {
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
305err:
306 free(buf);
307 return ret;
308}
309
310static EVP_PKEY *
311b2i_dss(const unsigned char **in, unsigned int length, unsigned int bitlen,
312 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
320 nbyte = (bitlen + 7) >> 3;
321
322 dsa = DSA_new();
323 ret = EVP_PKEY_new();
324 if (!dsa || !ret)
325 goto memerr;
326 if (!read_lebn(&p, nbyte, &dsa->p))
327 goto memerr;
328 if (!read_lebn(&p, 20, &dsa->q))
329 goto memerr;
330 if (!read_lebn(&p, nbyte, &dsa->g))
331 goto memerr;
332 if (ispub) {
333 if (!read_lebn(&p, nbyte, &dsa->pub_key))
334 goto memerr;
335 } else {
336 if (!read_lebn(&p, 20, &dsa->priv_key))
337 goto memerr;
338 /* Calculate public key */
339 if (!(dsa->pub_key = BN_new()))
340 goto memerr;
341 if (!(ctx = BN_CTX_new()))
342 goto memerr;
343 if (!BN_mod_exp(dsa->pub_key, dsa->g,
344 dsa->priv_key, dsa->p, ctx))
345 goto memerr;
346 BN_CTX_free(ctx);
347 }
348
349 EVP_PKEY_set1_DSA(ret, dsa);
350 DSA_free(dsa);
351 *in = p;
352 return ret;
353
354memerr:
355 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
356 DSA_free(dsa);
357 EVP_PKEY_free(ret);
358 BN_CTX_free(ctx);
359 return NULL;
360}
361
362static EVP_PKEY *
363b2i_rsa(const unsigned char **in, unsigned int length, unsigned int bitlen,
364 int ispub)
365{
366 const unsigned char *p = *in;
367 EVP_PKEY *ret = NULL;
368 RSA *rsa = NULL;
369 unsigned int nbyte, hnbyte;
370
371 nbyte = (bitlen + 7) >> 3;
372 hnbyte = (bitlen + 15) >> 4;
373 rsa = RSA_new();
374 ret = EVP_PKEY_new();
375 if (!rsa || !ret)
376 goto memerr;
377 rsa->e = BN_new();
378 if (!rsa->e)
379 goto memerr;
380 if (!BN_set_word(rsa->e, read_ledword(&p)))
381 goto memerr;
382 if (!read_lebn(&p, nbyte, &rsa->n))
383 goto memerr;
384 if (!ispub) {
385 if (!read_lebn(&p, hnbyte, &rsa->p))
386 goto memerr;
387 if (!read_lebn(&p, hnbyte, &rsa->q))
388 goto memerr;
389 if (!read_lebn(&p, hnbyte, &rsa->dmp1))
390 goto memerr;
391 if (!read_lebn(&p, hnbyte, &rsa->dmq1))
392 goto memerr;
393 if (!read_lebn(&p, hnbyte, &rsa->iqmp))
394 goto memerr;
395 if (!read_lebn(&p, nbyte, &rsa->d))
396 goto memerr;
397 }
398
399 EVP_PKEY_set1_RSA(ret, rsa);
400 RSA_free(rsa);
401 *in = p;
402 return ret;
403
404memerr:
405 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
406 RSA_free(rsa);
407 EVP_PKEY_free(ret);
408 return NULL;
409}
410
411EVP_PKEY *
412b2i_PrivateKey(const unsigned char **in, long length)
413{
414 return do_b2i(in, length, 0);
415}
416
417EVP_PKEY *
418b2i_PublicKey(const unsigned char **in, long length)
419{
420 return do_b2i(in, length, 1);
421}
422
423EVP_PKEY *
424b2i_PrivateKey_bio(BIO *in)
425{
426 return do_b2i_bio(in, 0);
427}
428
429EVP_PKEY *
430b2i_PublicKey_bio(BIO *in)
431{
432 return do_b2i_bio(in, 1);
433}
434
435static void
436write_ledword(unsigned char **out, unsigned int dw)
437{
438 unsigned char *p = *out;
439
440 *p++ = dw & 0xff;
441 *p++ = (dw >> 8) & 0xff;
442 *p++ = (dw >> 16) & 0xff;
443 *p++ = (dw >> 24) & 0xff;
444 *out = p;
445}
446
447static void
448write_lebn(unsigned char **out, const BIGNUM *bn, int len)
449{
450 int nb, i;
451 unsigned char *p = *out, *q, c;
452
453 nb = BN_num_bytes(bn);
454 BN_bn2bin(bn, p);
455 q = p + nb - 1;
456 /* In place byte order reversal */
457 for (i = 0; i < nb / 2; i++) {
458 c = *p;
459 *p++ = *q;
460 *q-- = c;
461 }
462 *out += nb;
463 /* Pad with zeroes if we have to */
464 if (len > 0) {
465 len -= nb;
466 if (len > 0) {
467 memset(*out, 0, len);
468 *out += len;
469 }
470 }
471}
472
473
474static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
475static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
476
477static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
478static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
479
480static int
481do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
482{
483 unsigned char *p;
484 unsigned int bitlen, magic = 0, keyalg;
485 int outlen, noinc = 0;
486
487 if (pk->type == EVP_PKEY_DSA) {
488 bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic);
489 keyalg = MS_KEYALG_DSS_SIGN;
490 } else if (pk->type == EVP_PKEY_RSA) {
491 bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic);
492 keyalg = MS_KEYALG_RSA_KEYX;
493 } else
494 return -1;
495 if (bitlen == 0)
496 return -1;
497 outlen = 16 + blob_length(bitlen,
498 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
499 if (out == NULL)
500 return outlen;
501 if (*out)
502 p = *out;
503 else {
504 p = malloc(outlen);
505 if (!p)
506 return -1;
507 *out = p;
508 noinc = 1;
509 }
510 if (ispub)
511 *p++ = MS_PUBLICKEYBLOB;
512 else
513 *p++ = MS_PRIVATEKEYBLOB;
514 *p++ = 0x2;
515 *p++ = 0;
516 *p++ = 0;
517 write_ledword(&p, keyalg);
518 write_ledword(&p, magic);
519 write_ledword(&p, bitlen);
520 if (keyalg == MS_KEYALG_DSS_SIGN)
521 write_dsa(&p, pk->pkey.dsa, ispub);
522 else
523 write_rsa(&p, pk->pkey.rsa, ispub);
524 if (!noinc)
525 *out += outlen;
526 return outlen;
527}
528
529static int
530do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
531{
532 unsigned char *tmp = NULL;
533 int outlen, wrlen;
534
535 outlen = do_i2b(&tmp, pk, ispub);
536 if (outlen < 0)
537 return -1;
538 wrlen = BIO_write(out, tmp, outlen);
539 free(tmp);
540 if (wrlen == outlen)
541 return outlen;
542 return -1;
543}
544
545static int
546check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
547{
548 int bitlen;
549
550 bitlen = BN_num_bits(dsa->p);
551 if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) ||
552 (BN_num_bits(dsa->g) > bitlen))
553 goto badkey;
554 if (ispub) {
555 if (BN_num_bits(dsa->pub_key) > bitlen)
556 goto badkey;
557 *pmagic = MS_DSS1MAGIC;
558 } else {
559 if (BN_num_bits(dsa->priv_key) > 160)
560 goto badkey;
561 *pmagic = MS_DSS2MAGIC;
562 }
563
564 return bitlen;
565
566badkey:
567 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
568 return 0;
569}
570
571static int
572check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
573{
574 int nbyte, hnbyte, bitlen;
575
576 if (BN_num_bits(rsa->e) > 32)
577 goto badkey;
578 bitlen = BN_num_bits(rsa->n);
579 nbyte = BN_num_bytes(rsa->n);
580 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
581 if (ispub) {
582 *pmagic = MS_RSA1MAGIC;
583 return bitlen;
584 } else {
585 *pmagic = MS_RSA2MAGIC;
586 /* For private key each component must fit within nbyte or
587 * hnbyte.
588 */
589 if (BN_num_bytes(rsa->d) > nbyte)
590 goto badkey;
591 if ((BN_num_bytes(rsa->iqmp) > hnbyte) ||
592 (BN_num_bytes(rsa->p) > hnbyte) ||
593 (BN_num_bytes(rsa->q) > hnbyte) ||
594 (BN_num_bytes(rsa->dmp1) > hnbyte) ||
595 (BN_num_bytes(rsa->dmq1) > hnbyte))
596 goto badkey;
597 }
598 return bitlen;
599
600badkey:
601 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
602 return 0;
603}
604
605static void
606write_rsa(unsigned char **out, RSA *rsa, int ispub)
607{
608 int nbyte, hnbyte;
609
610 nbyte = BN_num_bytes(rsa->n);
611 hnbyte = (BN_num_bits(rsa->n) + 15) >> 4;
612 write_lebn(out, rsa->e, 4);
613 write_lebn(out, rsa->n, -1);
614 if (ispub)
615 return;
616 write_lebn(out, rsa->p, hnbyte);
617 write_lebn(out, rsa->q, hnbyte);
618 write_lebn(out, rsa->dmp1, hnbyte);
619 write_lebn(out, rsa->dmq1, hnbyte);
620 write_lebn(out, rsa->iqmp, hnbyte);
621 write_lebn(out, rsa->d, nbyte);
622}
623
624static void
625write_dsa(unsigned char **out, DSA *dsa, int ispub)
626{
627 int nbyte;
628
629 nbyte = BN_num_bytes(dsa->p);
630 write_lebn(out, dsa->p, nbyte);
631 write_lebn(out, dsa->q, 20);
632 write_lebn(out, dsa->g, nbyte);
633 if (ispub)
634 write_lebn(out, dsa->pub_key, nbyte);
635 else
636 write_lebn(out, dsa->priv_key, 20);
637 /* Set "invalid" for seed structure values */
638 memset(*out, 0xff, 24);
639 *out += 24;
640 return;
641}
642
643int
644i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
645{
646 return do_i2b_bio(out, pk, 0);
647}
648
649int
650i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
651{
652 return do_i2b_bio(out, pk, 1);
653}
654
655#ifndef OPENSSL_NO_RC4
656
657static int
658do_PVK_header(const unsigned char **in, unsigned int length, int skip_magic,
659 unsigned int *psaltlen, unsigned int *pkeylen)
660{
661 const unsigned char *p = *in;
662 unsigned int pvk_magic, is_encrypted;
663
664 if (skip_magic) {
665 if (length < 20) {
666 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
667 return 0;
668 }
669 length -= 20;
670 } else {
671 if (length < 24) {
672 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
673 return 0;
674 }
675 length -= 24;
676 pvk_magic = read_ledword(&p);
677 if (pvk_magic != MS_PVKMAGIC) {
678 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
679 return 0;
680 }
681 }
682 /* Skip reserved */
683 p += 4;
684 /*keytype = */read_ledword(&p);
685 is_encrypted = read_ledword(&p);
686 *psaltlen = read_ledword(&p);
687 *pkeylen = read_ledword(&p);
688 if (*psaltlen > 65536 || *pkeylen > 65536) {
689 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
690 return 0;
691 }
692
693 if (is_encrypted && !*psaltlen) {
694 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
695 return 0;
696 }
697
698 *in = p;
699 return 1;
700}
701
702static int
703derive_pvk_key(unsigned char *key, const unsigned char *salt,
704 unsigned int saltlen, const unsigned char *pass, int passlen)
705{
706 EVP_MD_CTX mctx;
707 int rv = 1;
708
709 EVP_MD_CTX_init(&mctx);
710 if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL) ||
711 !EVP_DigestUpdate(&mctx, salt, saltlen) ||
712 !EVP_DigestUpdate(&mctx, pass, passlen) ||
713 !EVP_DigestFinal_ex(&mctx, key, NULL))
714 rv = 0;
715
716 EVP_MD_CTX_cleanup(&mctx);
717 return rv;
718}
719
720static EVP_PKEY *
721do_PVK_body(const unsigned char **in, unsigned int saltlen,
722 unsigned int keylen, pem_password_cb *cb, void *u)
723{
724 EVP_PKEY *ret = NULL;
725 const unsigned char *p = *in;
726 unsigned int magic;
727 unsigned char *enctmp = NULL, *q;
728 EVP_CIPHER_CTX cctx;
729
730 EVP_CIPHER_CTX_init(&cctx);
731 if (saltlen) {
732 char psbuf[PEM_BUFSIZE];
733 unsigned char keybuf[20];
734 int enctmplen, inlen;
735
736 if (cb)
737 inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
738 else
739 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
740 if (inlen <= 0) {
741 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
742 goto err;
743 }
744 enctmp = malloc(keylen + 8);
745 if (!enctmp) {
746 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
747 goto err;
748 }
749 if (!derive_pvk_key(keybuf, p, saltlen, (unsigned char *)psbuf,
750 inlen)) {
751 goto err;
752 }
753 p += saltlen;
754 /* Copy BLOBHEADER across, decrypt rest */
755 memcpy(enctmp, p, 8);
756 p += 8;
757 if (keylen < 8) {
758 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
759 goto err;
760 }
761 inlen = keylen - 8;
762 q = enctmp + 8;
763 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
764 goto err;
765 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
766 goto err;
767 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen))
768 goto err;
769 magic = read_ledword((const unsigned char **)&q);
770 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
771 q = enctmp + 8;
772 memset(keybuf + 5, 0, 11);
773 if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf,
774 NULL))
775 goto err;
776 explicit_bzero(keybuf, 20);
777 if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen))
778 goto err;
779 if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen,
780 &enctmplen))
781 goto err;
782 magic = read_ledword((const unsigned char **)&q);
783 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
784 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
785 goto err;
786 }
787 } else
788 explicit_bzero(keybuf, 20);
789 p = enctmp;
790 }
791
792 ret = b2i_PrivateKey(&p, keylen);
793
794err:
795 EVP_CIPHER_CTX_cleanup(&cctx);
796 if (enctmp && saltlen)
797 free(enctmp);
798 return ret;
799}
800
801
802EVP_PKEY *
803b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
804{
805 unsigned char pvk_hdr[24], *buf = NULL;
806 const unsigned char *p;
807 size_t buflen;
808 EVP_PKEY *ret = NULL;
809 unsigned int saltlen, keylen;
810
811 if (BIO_read(in, pvk_hdr, 24) != 24) {
812 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
813 return NULL;
814 }
815 p = pvk_hdr;
816
817 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
818 return 0;
819 buflen = keylen + saltlen;
820 buf = malloc(buflen);
821 if (!buf) {
822 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
823 return 0;
824 }
825 p = buf;
826 if (BIO_read(in, buf, buflen) != buflen) {
827 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
828 goto err;
829 }
830 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
831
832err:
833 if (buf) {
834 explicit_bzero(buf, buflen);
835 free(buf);
836 }
837 return ret;
838}
839
840static int
841i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, pem_password_cb *cb,
842 void *u)
843{
844 int outlen = 24, pklen;
845 unsigned char *p, *salt = NULL;
846 EVP_CIPHER_CTX cctx;
847
848 EVP_CIPHER_CTX_init(&cctx);
849 if (enclevel)
850 outlen += PVK_SALTLEN;
851 pklen = do_i2b(NULL, pk, 0);
852 if (pklen < 0)
853 return -1;
854 outlen += pklen;
855 if (!out)
856 return outlen;
857 if (*out)
858 p = *out;
859 else {
860 p = malloc(outlen);
861 if (!p) {
862 PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
863 return -1;
864 }
865 *out = p;
866 }
867
868 write_ledword(&p, MS_PVKMAGIC);
869 write_ledword(&p, 0);
870 if (pk->type == EVP_PKEY_DSA)
871 write_ledword(&p, MS_KEYTYPE_SIGN);
872 else
873 write_ledword(&p, MS_KEYTYPE_KEYX);
874 write_ledword(&p, enclevel ? 1 : 0);
875 write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
876 write_ledword(&p, pklen);
877 if (enclevel) {
878 arc4random_buf(p, PVK_SALTLEN);
879 salt = p;
880 p += PVK_SALTLEN;
881 }
882 do_i2b(&p, pk, 0);
883 if (enclevel == 0)
884 return outlen;
885 else {
886 char psbuf[PEM_BUFSIZE];
887 unsigned char keybuf[20];
888 int enctmplen, inlen;
889 if (cb)
890 inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
891 else
892 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
893 if (inlen <= 0) {
894 PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
895 goto error;
896 }
897 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
898 (unsigned char *)psbuf, inlen))
899 goto error;
900 if (enclevel == 1)
901 memset(keybuf + 5, 0, 11);
902 p = salt + PVK_SALTLEN + 8;
903 if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL))
904 goto error;
905 explicit_bzero(keybuf, 20);
906 if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8))
907 goto error;
908 if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen))
909 goto error;
910 }
911 EVP_CIPHER_CTX_cleanup(&cctx);
912 return outlen;
913
914error:
915 EVP_CIPHER_CTX_cleanup(&cctx);
916 return -1;
917}
918
919int
920i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, pem_password_cb *cb, void *u)
921{
922 unsigned char *tmp = NULL;
923 int outlen, wrlen;
924
925 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
926 if (outlen < 0)
927 return -1;
928 wrlen = BIO_write(out, tmp, outlen);
929 free(tmp);
930 if (wrlen == outlen) {
931 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
932 return outlen;
933 }
934 return -1;
935}
936
937#endif
938
939#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-07 21:28:19 +0000