source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/pem/pvkfmt.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 23.0 KB
Line 
1/*
2 * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/*
11 * Support for PVK format keys and related structures (such a PUBLICKEYBLOB
12 * and PRIVATEKEYBLOB).
13 */
14
15#include "internal/cryptlib.h"
16#include <openssl/pem.h>
17#include <openssl/rand.h>
18#include <openssl/bn.h>
19#if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA)
20# include <openssl/dsa.h>
21# include <openssl/rsa.h>
22
23/*
24 * Utility function: read a DWORD (4 byte unsigned integer) in little endian
25 * format
26 */
27
28static unsigned int read_ledword(const unsigned char **in)
29{
30 const unsigned char *p = *in;
31 unsigned int ret;
32 ret = *p++;
33 ret |= (*p++ << 8);
34 ret |= (*p++ << 16);
35 ret |= (*p++ << 24);
36 *in = p;
37 return ret;
38}
39
40/*
41 * Read a BIGNUM in little endian format. The docs say that this should take
42 * up bitlen/8 bytes.
43 */
44
45static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r)
46{
47 *r = BN_lebin2bn(*in, nbyte, NULL);
48 if (*r == NULL)
49 return 0;
50 *in += nbyte;
51 return 1;
52}
53
54/* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */
55
56# define MS_PUBLICKEYBLOB 0x6
57# define MS_PRIVATEKEYBLOB 0x7
58# define MS_RSA1MAGIC 0x31415352L
59# define MS_RSA2MAGIC 0x32415352L
60# define MS_DSS1MAGIC 0x31535344L
61# define MS_DSS2MAGIC 0x32535344L
62
63# define MS_KEYALG_RSA_KEYX 0xa400
64# define MS_KEYALG_DSS_SIGN 0x2200
65
66# define MS_KEYTYPE_KEYX 0x1
67# define MS_KEYTYPE_SIGN 0x2
68
69/* Maximum length of a blob after header */
70# define BLOB_MAX_LENGTH 102400
71
72/* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */
73# define MS_PVKMAGIC 0xb0b5f11eL
74/* Salt length for PVK files */
75# define PVK_SALTLEN 0x10
76/* Maximum length in PVK header */
77# define PVK_MAX_KEYLEN 102400
78/* Maximum salt length */
79# define PVK_MAX_SALTLEN 10240
80
81static EVP_PKEY *b2i_rsa(const unsigned char **in,
82 unsigned int bitlen, int ispub);
83static EVP_PKEY *b2i_dss(const unsigned char **in,
84 unsigned int bitlen, int ispub);
85
86static int do_blob_header(const unsigned char **in, unsigned int length,
87 unsigned int *pmagic, unsigned int *pbitlen,
88 int *pisdss, int *pispub)
89{
90 const unsigned char *p = *in;
91 if (length < 16)
92 return 0;
93 /* bType */
94 if (*p == MS_PUBLICKEYBLOB) {
95 if (*pispub == 0) {
96 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
97 return 0;
98 }
99 *pispub = 1;
100 } else if (*p == MS_PRIVATEKEYBLOB) {
101 if (*pispub == 1) {
102 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
103 return 0;
104 }
105 *pispub = 0;
106 } else
107 return 0;
108 p++;
109 /* Version */
110 if (*p++ != 0x2) {
111 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER);
112 return 0;
113 }
114 /* Ignore reserved, aiKeyAlg */
115 p += 6;
116 *pmagic = read_ledword(&p);
117 *pbitlen = read_ledword(&p);
118 *pisdss = 0;
119 switch (*pmagic) {
120
121 case MS_DSS1MAGIC:
122 *pisdss = 1;
123 case MS_RSA1MAGIC:
124 if (*pispub == 0) {
125 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB);
126 return 0;
127 }
128 break;
129
130 case MS_DSS2MAGIC:
131 *pisdss = 1;
132 case MS_RSA2MAGIC:
133 if (*pispub == 1) {
134 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB);
135 return 0;
136 }
137 break;
138
139 default:
140 PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER);
141 return -1;
142 }
143 *in = p;
144 return 1;
145}
146
147static unsigned int blob_length(unsigned bitlen, int isdss, int ispub)
148{
149 unsigned int nbyte, hnbyte;
150 nbyte = (bitlen + 7) >> 3;
151 hnbyte = (bitlen + 15) >> 4;
152 if (isdss) {
153
154 /*
155 * Expected length: 20 for q + 3 components bitlen each + 24 for seed
156 * structure.
157 */
158 if (ispub)
159 return 44 + 3 * nbyte;
160 /*
161 * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed
162 * structure.
163 */
164 else
165 return 64 + 2 * nbyte;
166 } else {
167 /* Expected length: 4 for 'e' + 'n' */
168 if (ispub)
169 return 4 + nbyte;
170 else
171 /*
172 * Expected length: 4 for 'e' and 7 other components. 2
173 * components are bitlen size, 5 are bitlen/2
174 */
175 return 4 + 2 * nbyte + 5 * hnbyte;
176 }
177
178}
179
180static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length,
181 int ispub)
182{
183 const unsigned char *p = *in;
184 unsigned int bitlen, magic;
185 int isdss;
186 if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) {
187 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR);
188 return NULL;
189 }
190 length -= 16;
191 if (length < blob_length(bitlen, isdss, ispub)) {
192 PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT);
193 return NULL;
194 }
195 if (isdss)
196 return b2i_dss(&p, bitlen, ispub);
197 else
198 return b2i_rsa(&p, bitlen, ispub);
199}
200
201static EVP_PKEY *do_b2i_bio(BIO *in, int ispub)
202{
203 const unsigned char *p;
204 unsigned char hdr_buf[16], *buf = NULL;
205 unsigned int bitlen, magic, length;
206 int isdss;
207 EVP_PKEY *ret = NULL;
208 if (BIO_read(in, hdr_buf, 16) != 16) {
209 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
210 return NULL;
211 }
212 p = hdr_buf;
213 if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0)
214 return NULL;
215
216 length = blob_length(bitlen, isdss, ispub);
217 if (length > BLOB_MAX_LENGTH) {
218 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_HEADER_TOO_LONG);
219 return NULL;
220 }
221 buf = OPENSSL_malloc(length);
222 if (buf == NULL) {
223 PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE);
224 goto err;
225 }
226 p = buf;
227 if (BIO_read(in, buf, length) != (int)length) {
228 PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT);
229 goto err;
230 }
231
232 if (isdss)
233 ret = b2i_dss(&p, bitlen, ispub);
234 else
235 ret = b2i_rsa(&p, bitlen, ispub);
236
237 err:
238 OPENSSL_free(buf);
239 return ret;
240}
241
242static EVP_PKEY *b2i_dss(const unsigned char **in,
243 unsigned int bitlen, int ispub)
244{
245 const unsigned char *p = *in;
246 EVP_PKEY *ret = NULL;
247 DSA *dsa = NULL;
248 BN_CTX *ctx = NULL;
249 unsigned int nbyte;
250 BIGNUM *pbn = NULL, *qbn = NULL, *gbn = NULL, *priv_key = NULL;
251 BIGNUM *pub_key = NULL;
252
253 nbyte = (bitlen + 7) >> 3;
254
255 dsa = DSA_new();
256 ret = EVP_PKEY_new();
257 if (dsa == NULL || ret == NULL)
258 goto memerr;
259 if (!read_lebn(&p, nbyte, &pbn))
260 goto memerr;
261
262 if (!read_lebn(&p, 20, &qbn))
263 goto memerr;
264
265 if (!read_lebn(&p, nbyte, &gbn))
266 goto memerr;
267
268 if (ispub) {
269 if (!read_lebn(&p, nbyte, &pub_key))
270 goto memerr;
271 } else {
272 if (!read_lebn(&p, 20, &priv_key))
273 goto memerr;
274
275 /* Calculate public key */
276 pub_key = BN_new();
277 if (pub_key == NULL)
278 goto memerr;
279 if ((ctx = BN_CTX_new()) == NULL)
280 goto memerr;
281
282 if (!BN_mod_exp(pub_key, gbn, priv_key, pbn, ctx))
283 goto memerr;
284
285 BN_CTX_free(ctx);
286 }
287 if (!DSA_set0_pqg(dsa, pbn, qbn, gbn))
288 goto memerr;
289 pbn = qbn = gbn = NULL;
290 if (!DSA_set0_key(dsa, pub_key, priv_key))
291 goto memerr;
292
293 EVP_PKEY_set1_DSA(ret, dsa);
294 DSA_free(dsa);
295 *in = p;
296 return ret;
297
298 memerr:
299 PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE);
300 DSA_free(dsa);
301 BN_free(pbn);
302 BN_free(qbn);
303 BN_free(gbn);
304 BN_free(pub_key);
305 BN_free(priv_key);
306 EVP_PKEY_free(ret);
307 BN_CTX_free(ctx);
308 return NULL;
309}
310
311static EVP_PKEY *b2i_rsa(const unsigned char **in,
312 unsigned int bitlen, int ispub)
313{
314 const unsigned char *pin = *in;
315 EVP_PKEY *ret = NULL;
316 BIGNUM *e = NULL, *n = NULL, *d = NULL;
317 BIGNUM *p = NULL, *q = NULL, *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
318 RSA *rsa = NULL;
319 unsigned int nbyte, hnbyte;
320 nbyte = (bitlen + 7) >> 3;
321 hnbyte = (bitlen + 15) >> 4;
322 rsa = RSA_new();
323 ret = EVP_PKEY_new();
324 if (rsa == NULL || ret == NULL)
325 goto memerr;
326 e = BN_new();
327 if (e == NULL)
328 goto memerr;
329 if (!BN_set_word(e, read_ledword(&pin)))
330 goto memerr;
331 if (!read_lebn(&pin, nbyte, &n))
332 goto memerr;
333 if (!ispub) {
334 if (!read_lebn(&pin, hnbyte, &p))
335 goto memerr;
336 if (!read_lebn(&pin, hnbyte, &q))
337 goto memerr;
338 if (!read_lebn(&pin, hnbyte, &dmp1))
339 goto memerr;
340 if (!read_lebn(&pin, hnbyte, &dmq1))
341 goto memerr;
342 if (!read_lebn(&pin, hnbyte, &iqmp))
343 goto memerr;
344 if (!read_lebn(&pin, nbyte, &d))
345 goto memerr;
346 RSA_set0_factors(rsa, p, q);
347 RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp);
348 }
349 RSA_set0_key(rsa, n, e, d);
350
351 EVP_PKEY_set1_RSA(ret, rsa);
352 RSA_free(rsa);
353 *in = pin;
354 return ret;
355 memerr:
356 PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE);
357 BN_free(e);
358 BN_free(n);
359 BN_free(p);
360 BN_free(q);
361 BN_free(dmp1);
362 BN_free(dmq1);
363 BN_free(iqmp);
364 BN_free(d);
365 RSA_free(rsa);
366 EVP_PKEY_free(ret);
367 return NULL;
368}
369
370EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length)
371{
372 return do_b2i(in, length, 0);
373}
374
375EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length)
376{
377 return do_b2i(in, length, 1);
378}
379
380EVP_PKEY *b2i_PrivateKey_bio(BIO *in)
381{
382 return do_b2i_bio(in, 0);
383}
384
385EVP_PKEY *b2i_PublicKey_bio(BIO *in)
386{
387 return do_b2i_bio(in, 1);
388}
389
390static void write_ledword(unsigned char **out, unsigned int dw)
391{
392 unsigned char *p = *out;
393 *p++ = dw & 0xff;
394 *p++ = (dw >> 8) & 0xff;
395 *p++ = (dw >> 16) & 0xff;
396 *p++ = (dw >> 24) & 0xff;
397 *out = p;
398}
399
400static void write_lebn(unsigned char **out, const BIGNUM *bn, int len)
401{
402 BN_bn2lebinpad(bn, *out, len);
403 *out += len;
404}
405
406static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic);
407static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic);
408
409static void write_rsa(unsigned char **out, RSA *rsa, int ispub);
410static void write_dsa(unsigned char **out, DSA *dsa, int ispub);
411
412static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub)
413{
414 unsigned char *p;
415 unsigned int bitlen, magic = 0, keyalg;
416 int outlen, noinc = 0;
417 int pktype = EVP_PKEY_id(pk);
418 if (pktype == EVP_PKEY_DSA) {
419 bitlen = check_bitlen_dsa(EVP_PKEY_get0_DSA(pk), ispub, &magic);
420 keyalg = MS_KEYALG_DSS_SIGN;
421 } else if (pktype == EVP_PKEY_RSA) {
422 bitlen = check_bitlen_rsa(EVP_PKEY_get0_RSA(pk), ispub, &magic);
423 keyalg = MS_KEYALG_RSA_KEYX;
424 } else
425 return -1;
426 if (bitlen == 0)
427 return -1;
428 outlen = 16 + blob_length(bitlen,
429 keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub);
430 if (out == NULL)
431 return outlen;
432 if (*out)
433 p = *out;
434 else {
435 p = OPENSSL_malloc(outlen);
436 if (p == NULL)
437 return -1;
438 *out = p;
439 noinc = 1;
440 }
441 if (ispub)
442 *p++ = MS_PUBLICKEYBLOB;
443 else
444 *p++ = MS_PRIVATEKEYBLOB;
445 *p++ = 0x2;
446 *p++ = 0;
447 *p++ = 0;
448 write_ledword(&p, keyalg);
449 write_ledword(&p, magic);
450 write_ledword(&p, bitlen);
451 if (keyalg == MS_KEYALG_DSS_SIGN)
452 write_dsa(&p, EVP_PKEY_get0_DSA(pk), ispub);
453 else
454 write_rsa(&p, EVP_PKEY_get0_RSA(pk), ispub);
455 if (!noinc)
456 *out += outlen;
457 return outlen;
458}
459
460static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub)
461{
462 unsigned char *tmp = NULL;
463 int outlen, wrlen;
464 outlen = do_i2b(&tmp, pk, ispub);
465 if (outlen < 0)
466 return -1;
467 wrlen = BIO_write(out, tmp, outlen);
468 OPENSSL_free(tmp);
469 if (wrlen == outlen)
470 return outlen;
471 return -1;
472}
473
474static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic)
475{
476 int bitlen;
477 const BIGNUM *p = NULL, *q = NULL, *g = NULL;
478 const BIGNUM *pub_key = NULL, *priv_key = NULL;
479
480 DSA_get0_pqg(dsa, &p, &q, &g);
481 DSA_get0_key(dsa, &pub_key, &priv_key);
482 bitlen = BN_num_bits(p);
483 if ((bitlen & 7) || (BN_num_bits(q) != 160)
484 || (BN_num_bits(g) > bitlen))
485 goto badkey;
486 if (ispub) {
487 if (BN_num_bits(pub_key) > bitlen)
488 goto badkey;
489 *pmagic = MS_DSS1MAGIC;
490 } else {
491 if (BN_num_bits(priv_key) > 160)
492 goto badkey;
493 *pmagic = MS_DSS2MAGIC;
494 }
495
496 return bitlen;
497 badkey:
498 PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
499 return 0;
500}
501
502static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic)
503{
504 int nbyte, hnbyte, bitlen;
505 const BIGNUM *e;
506
507 RSA_get0_key(rsa, NULL, &e, NULL);
508 if (BN_num_bits(e) > 32)
509 goto badkey;
510 bitlen = RSA_bits(rsa);
511 nbyte = RSA_size(rsa);
512 hnbyte = (bitlen + 15) >> 4;
513 if (ispub) {
514 *pmagic = MS_RSA1MAGIC;
515 return bitlen;
516 } else {
517 const BIGNUM *d, *p, *q, *iqmp, *dmp1, *dmq1;
518
519 *pmagic = MS_RSA2MAGIC;
520
521 /*
522 * For private key each component must fit within nbyte or hnbyte.
523 */
524 RSA_get0_key(rsa, NULL, NULL, &d);
525 if (BN_num_bytes(d) > nbyte)
526 goto badkey;
527 RSA_get0_factors(rsa, &p, &q);
528 RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
529 if ((BN_num_bytes(iqmp) > hnbyte)
530 || (BN_num_bytes(p) > hnbyte)
531 || (BN_num_bytes(q) > hnbyte)
532 || (BN_num_bytes(dmp1) > hnbyte)
533 || (BN_num_bytes(dmq1) > hnbyte))
534 goto badkey;
535 }
536 return bitlen;
537 badkey:
538 PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS);
539 return 0;
540}
541
542static void write_rsa(unsigned char **out, RSA *rsa, int ispub)
543{
544 int nbyte, hnbyte;
545 const BIGNUM *n, *d, *e, *p, *q, *iqmp, *dmp1, *dmq1;
546
547 nbyte = RSA_size(rsa);
548 hnbyte = (RSA_bits(rsa) + 15) >> 4;
549 RSA_get0_key(rsa, &n, &e, &d);
550 write_lebn(out, e, 4);
551 write_lebn(out, n, nbyte);
552 if (ispub)
553 return;
554 RSA_get0_factors(rsa, &p, &q);
555 RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
556 write_lebn(out, p, hnbyte);
557 write_lebn(out, q, hnbyte);
558 write_lebn(out, dmp1, hnbyte);
559 write_lebn(out, dmq1, hnbyte);
560 write_lebn(out, iqmp, hnbyte);
561 write_lebn(out, d, nbyte);
562}
563
564static void write_dsa(unsigned char **out, DSA *dsa, int ispub)
565{
566 int nbyte;
567 const BIGNUM *p = NULL, *q = NULL, *g = NULL;
568 const BIGNUM *pub_key = NULL, *priv_key = NULL;
569
570 DSA_get0_pqg(dsa, &p, &q, &g);
571 DSA_get0_key(dsa, &pub_key, &priv_key);
572 nbyte = BN_num_bytes(p);
573 write_lebn(out, p, nbyte);
574 write_lebn(out, q, 20);
575 write_lebn(out, g, nbyte);
576 if (ispub)
577 write_lebn(out, pub_key, nbyte);
578 else
579 write_lebn(out, priv_key, 20);
580 /* Set "invalid" for seed structure values */
581 memset(*out, 0xff, 24);
582 *out += 24;
583 return;
584}
585
586int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk)
587{
588 return do_i2b_bio(out, pk, 0);
589}
590
591int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk)
592{
593 return do_i2b_bio(out, pk, 1);
594}
595
596# ifndef OPENSSL_NO_RC4
597
598static int do_PVK_header(const unsigned char **in, unsigned int length,
599 int skip_magic,
600 unsigned int *psaltlen, unsigned int *pkeylen)
601{
602 const unsigned char *p = *in;
603 unsigned int pvk_magic, is_encrypted;
604 if (skip_magic) {
605 if (length < 20) {
606 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
607 return 0;
608 }
609 } else {
610 if (length < 24) {
611 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT);
612 return 0;
613 }
614 pvk_magic = read_ledword(&p);
615 if (pvk_magic != MS_PVKMAGIC) {
616 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER);
617 return 0;
618 }
619 }
620 /* Skip reserved */
621 p += 4;
622 /*
623 * keytype =
624 */ read_ledword(&p);
625 is_encrypted = read_ledword(&p);
626 *psaltlen = read_ledword(&p);
627 *pkeylen = read_ledword(&p);
628
629 if (*pkeylen > PVK_MAX_KEYLEN || *psaltlen > PVK_MAX_SALTLEN)
630 return 0;
631
632 if (is_encrypted && !*psaltlen) {
633 PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER);
634 return 0;
635 }
636
637 *in = p;
638 return 1;
639}
640
641static int derive_pvk_key(unsigned char *key,
642 const unsigned char *salt, unsigned int saltlen,
643 const unsigned char *pass, int passlen)
644{
645 EVP_MD_CTX *mctx = EVP_MD_CTX_new();
646 int rv = 1;
647 if (mctx == NULL
648 || !EVP_DigestInit_ex(mctx, EVP_sha1(), NULL)
649 || !EVP_DigestUpdate(mctx, salt, saltlen)
650 || !EVP_DigestUpdate(mctx, pass, passlen)
651 || !EVP_DigestFinal_ex(mctx, key, NULL))
652 rv = 0;
653
654 EVP_MD_CTX_free(mctx);
655 return rv;
656}
657
658static EVP_PKEY *do_PVK_body(const unsigned char **in,
659 unsigned int saltlen, unsigned int keylen,
660 pem_password_cb *cb, void *u)
661{
662 EVP_PKEY *ret = NULL;
663 const unsigned char *p = *in;
664 unsigned int magic;
665 unsigned char *enctmp = NULL, *q;
666
667 EVP_CIPHER_CTX *cctx = EVP_CIPHER_CTX_new();
668 if (saltlen) {
669 char psbuf[PEM_BUFSIZE];
670 unsigned char keybuf[20];
671 int enctmplen, inlen;
672 if (cb)
673 inlen = cb(psbuf, PEM_BUFSIZE, 0, u);
674 else
675 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
676 if (inlen <= 0) {
677 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ);
678 goto err;
679 }
680 enctmp = OPENSSL_malloc(keylen + 8);
681 if (enctmp == NULL) {
682 PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE);
683 goto err;
684 }
685 if (!derive_pvk_key(keybuf, p, saltlen,
686 (unsigned char *)psbuf, inlen))
687 goto err;
688 p += saltlen;
689 /* Copy BLOBHEADER across, decrypt rest */
690 memcpy(enctmp, p, 8);
691 p += 8;
692 if (keylen < 8) {
693 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT);
694 goto err;
695 }
696 inlen = keylen - 8;
697 q = enctmp + 8;
698 if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
699 goto err;
700 if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
701 goto err;
702 if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
703 goto err;
704 magic = read_ledword((const unsigned char **)&q);
705 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
706 q = enctmp + 8;
707 memset(keybuf + 5, 0, 11);
708 if (!EVP_DecryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
709 goto err;
710 OPENSSL_cleanse(keybuf, 20);
711 if (!EVP_DecryptUpdate(cctx, q, &enctmplen, p, inlen))
712 goto err;
713 if (!EVP_DecryptFinal_ex(cctx, q + enctmplen, &enctmplen))
714 goto err;
715 magic = read_ledword((const unsigned char **)&q);
716 if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) {
717 PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT);
718 goto err;
719 }
720 } else
721 OPENSSL_cleanse(keybuf, 20);
722 p = enctmp;
723 }
724
725 ret = b2i_PrivateKey(&p, keylen);
726 err:
727 EVP_CIPHER_CTX_free(cctx);
728 OPENSSL_free(enctmp);
729 return ret;
730}
731
732EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u)
733{
734 unsigned char pvk_hdr[24], *buf = NULL;
735 const unsigned char *p;
736 int buflen;
737 EVP_PKEY *ret = NULL;
738 unsigned int saltlen, keylen;
739 if (BIO_read(in, pvk_hdr, 24) != 24) {
740 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
741 return NULL;
742 }
743 p = pvk_hdr;
744
745 if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen))
746 return 0;
747 buflen = (int)keylen + saltlen;
748 buf = OPENSSL_malloc(buflen);
749 if (buf == NULL) {
750 PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE);
751 return 0;
752 }
753 p = buf;
754 if (BIO_read(in, buf, buflen) != buflen) {
755 PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT);
756 goto err;
757 }
758 ret = do_PVK_body(&p, saltlen, keylen, cb, u);
759
760 err:
761 OPENSSL_clear_free(buf, buflen);
762 return ret;
763}
764
765static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel,
766 pem_password_cb *cb, void *u)
767{
768 int outlen = 24, pklen;
769 unsigned char *p = NULL, *start = NULL, *salt = NULL;
770 EVP_CIPHER_CTX *cctx = NULL;
771 if (enclevel)
772 outlen += PVK_SALTLEN;
773 pklen = do_i2b(NULL, pk, 0);
774 if (pklen < 0)
775 return -1;
776 outlen += pklen;
777 if (out == NULL)
778 return outlen;
779 if (*out != NULL) {
780 p = *out;
781 } else {
782 start = p = OPENSSL_malloc(outlen);
783 if (p == NULL) {
784 PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE);
785 return -1;
786 }
787 }
788
789 cctx = EVP_CIPHER_CTX_new();
790 if (cctx == NULL)
791 goto error;
792
793 write_ledword(&p, MS_PVKMAGIC);
794 write_ledword(&p, 0);
795 if (EVP_PKEY_id(pk) == EVP_PKEY_DSA)
796 write_ledword(&p, MS_KEYTYPE_SIGN);
797 else
798 write_ledword(&p, MS_KEYTYPE_KEYX);
799 write_ledword(&p, enclevel ? 1 : 0);
800 write_ledword(&p, enclevel ? PVK_SALTLEN : 0);
801 write_ledword(&p, pklen);
802 if (enclevel) {
803 if (RAND_bytes(p, PVK_SALTLEN) <= 0)
804 goto error;
805 salt = p;
806 p += PVK_SALTLEN;
807 }
808 do_i2b(&p, pk, 0);
809 if (enclevel != 0) {
810 char psbuf[PEM_BUFSIZE];
811 unsigned char keybuf[20];
812 int enctmplen, inlen;
813 if (cb)
814 inlen = cb(psbuf, PEM_BUFSIZE, 1, u);
815 else
816 inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u);
817 if (inlen <= 0) {
818 PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ);
819 goto error;
820 }
821 if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN,
822 (unsigned char *)psbuf, inlen))
823 goto error;
824 if (enclevel == 1)
825 memset(keybuf + 5, 0, 11);
826 p = salt + PVK_SALTLEN + 8;
827 if (!EVP_EncryptInit_ex(cctx, EVP_rc4(), NULL, keybuf, NULL))
828 goto error;
829 OPENSSL_cleanse(keybuf, 20);
830 if (!EVP_DecryptUpdate(cctx, p, &enctmplen, p, pklen - 8))
831 goto error;
832 if (!EVP_DecryptFinal_ex(cctx, p + enctmplen, &enctmplen))
833 goto error;
834 }
835
836 EVP_CIPHER_CTX_free(cctx);
837
838 if (*out == NULL)
839 *out = start;
840
841 return outlen;
842
843 error:
844 EVP_CIPHER_CTX_free(cctx);
845 if (*out == NULL)
846 OPENSSL_free(start);
847 return -1;
848}
849
850int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel,
851 pem_password_cb *cb, void *u)
852{
853 unsigned char *tmp = NULL;
854 int outlen, wrlen;
855 outlen = i2b_PVK(&tmp, pk, enclevel, cb, u);
856 if (outlen < 0)
857 return -1;
858 wrlen = BIO_write(out, tmp, outlen);
859 OPENSSL_free(tmp);
860 if (wrlen == outlen) {
861 PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE);
862 return outlen;
863 }
864 return -1;
865}
866
867# endif
868
869#endif
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