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2e597528 | 1 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
a0156a92 DSH |
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> | |
1e26a8ba | 65 | #include <openssl/bn.h> |
d4f0339c | 66 | #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA) |
1e26a8ba GT |
67 | #include <openssl/dsa.h> |
68 | #include <openssl/rsa.h> | |
a0156a92 DSH |
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 + 2*nbyte + 5*hnbyte; | |
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; | |
0e345353 | 487 | unsigned int bitlen, magic = 0, keyalg; |
a0156a92 DSH |
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 | ||
00a37b5a DSH |
657 | #ifndef OPENSSL_NO_RC4 |
658 | ||
a0156a92 DSH |
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; | |
c8bbd98a | 665 | unsigned int pvk_magic, is_encrypted; |
a0156a92 DSH |
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; | |
c8bbd98a | 692 | /*keytype = */read_ledword(&p); |
a0156a92 DSH |
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; | |
b6dcdbfc | 712 | int rv = 1; |
a0156a92 | 713 | EVP_MD_CTX_init(&mctx); |
b6dcdbfc DSH |
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 | ||
a0156a92 | 720 | EVP_MD_CTX_cleanup(&mctx); |
b6dcdbfc | 721 | return rv; |
a0156a92 DSH |
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; | |
b6dcdbfc DSH |
733 | EVP_CIPHER_CTX cctx; |
734 | EVP_CIPHER_CTX_init(&cctx); | |
a0156a92 DSH |
735 | if (saltlen) |
736 | { | |
737 | char psbuf[PEM_BUFSIZE]; | |
738 | unsigned char keybuf[20]; | |
a0156a92 DSH |
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 | } | |
8a616a5a RL |
755 | if (!derive_pvk_key(keybuf, p, saltlen, |
756 | (unsigned char *)psbuf, inlen)) | |
a0156a92 DSH |
757 | return NULL; |
758 | p += saltlen; | |
759 | /* Copy BLOBHEADER across, decrypt rest */ | |
760 | memcpy(enctmp, p, 8); | |
761 | p += 8; | |
5ecf1141 DSH |
762 | if (keylen < 8) |
763 | { | |
764 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT); | |
765 | return NULL; | |
766 | } | |
a0156a92 DSH |
767 | inlen = keylen - 8; |
768 | q = enctmp + 8; | |
b6dcdbfc DSH |
769 | if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL)) |
770 | goto err; | |
771 | if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen)) | |
772 | goto err; | |
773 | if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen)) | |
774 | goto err; | |
a0156a92 DSH |
775 | magic = read_ledword((const unsigned char **)&q); |
776 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) | |
777 | { | |
778 | q = enctmp + 8; | |
779 | memset(keybuf + 5, 0, 11); | |
b6dcdbfc DSH |
780 | if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, |
781 | NULL)) | |
782 | goto err; | |
a0156a92 | 783 | OPENSSL_cleanse(keybuf, 20); |
b6dcdbfc DSH |
784 | if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen)) |
785 | goto err; | |
786 | if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, | |
787 | &enctmplen)) | |
788 | goto err; | |
a0156a92 DSH |
789 | magic = read_ledword((const unsigned char **)&q); |
790 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) | |
791 | { | |
a0156a92 DSH |
792 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT); |
793 | goto err; | |
794 | } | |
795 | } | |
796 | else | |
797 | OPENSSL_cleanse(keybuf, 20); | |
a0156a92 DSH |
798 | p = enctmp; |
799 | } | |
800 | ||
801 | ret = b2i_PrivateKey(&p, keylen); | |
802 | err: | |
b6dcdbfc | 803 | EVP_CIPHER_CTX_cleanup(&cctx); |
a0156a92 DSH |
804 | if (enctmp && saltlen) |
805 | OPENSSL_free(enctmp); | |
806 | return ret; | |
807 | } | |
808 | ||
809 | ||
810 | EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u) | |
811 | { | |
812 | unsigned char pvk_hdr[24], *buf = NULL; | |
813 | const unsigned char *p; | |
814 | int buflen; | |
815 | EVP_PKEY *ret = NULL; | |
816 | unsigned int saltlen, keylen; | |
817 | if (BIO_read(in, pvk_hdr, 24) != 24) | |
818 | { | |
819 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT); | |
820 | return NULL; | |
821 | } | |
822 | p = pvk_hdr; | |
823 | ||
824 | if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen)) | |
825 | return 0; | |
826 | buflen = (int) keylen + saltlen; | |
827 | buf = OPENSSL_malloc(buflen); | |
828 | if (!buf) | |
829 | { | |
830 | PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE); | |
831 | return 0; | |
832 | } | |
833 | p = buf; | |
834 | if (BIO_read(in, buf, buflen) != buflen) | |
835 | { | |
836 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT); | |
837 | goto err; | |
838 | } | |
839 | ret = do_PVK_body(&p, saltlen, keylen, cb, u); | |
840 | ||
841 | err: | |
842 | if (buf) | |
843 | { | |
844 | OPENSSL_cleanse(buf, buflen); | |
845 | OPENSSL_free(buf); | |
846 | } | |
847 | return ret; | |
848 | } | |
849 | ||
850 | ||
851 | ||
852 | static int i2b_PVK(unsigned char **out, EVP_PKEY*pk, int enclevel, | |
853 | pem_password_cb *cb, void *u) | |
854 | { | |
c8bbd98a | 855 | int outlen = 24, pklen; |
a0156a92 | 856 | unsigned char *p, *salt = NULL; |
b6dcdbfc DSH |
857 | EVP_CIPHER_CTX cctx; |
858 | EVP_CIPHER_CTX_init(&cctx); | |
a0156a92 DSH |
859 | if (enclevel) |
860 | outlen += PVK_SALTLEN; | |
861 | pklen = do_i2b(NULL, pk, 0); | |
862 | if (pklen < 0) | |
863 | return -1; | |
864 | outlen += pklen; | |
865 | if (!out) | |
866 | return outlen; | |
867 | if (*out) | |
a0156a92 | 868 | p = *out; |
a0156a92 DSH |
869 | else |
870 | { | |
871 | p = OPENSSL_malloc(outlen); | |
872 | if (!p) | |
873 | { | |
874 | PEMerr(PEM_F_I2B_PVK,ERR_R_MALLOC_FAILURE); | |
875 | return -1; | |
876 | } | |
877 | *out = p; | |
a0156a92 DSH |
878 | } |
879 | ||
880 | write_ledword(&p, MS_PVKMAGIC); | |
881 | write_ledword(&p, 0); | |
882 | if (pk->type == EVP_PKEY_DSA) | |
883 | write_ledword(&p, MS_KEYTYPE_SIGN); | |
884 | else | |
885 | write_ledword(&p, MS_KEYTYPE_KEYX); | |
886 | write_ledword(&p, enclevel ? 1 : 0); | |
887 | write_ledword(&p, enclevel ? PVK_SALTLEN: 0); | |
888 | write_ledword(&p, pklen); | |
889 | if (enclevel) | |
890 | { | |
891 | if (RAND_bytes(p, PVK_SALTLEN) <= 0) | |
892 | goto error; | |
893 | salt = p; | |
894 | p += PVK_SALTLEN; | |
895 | } | |
896 | do_i2b(&p, pk, 0); | |
897 | if (enclevel == 0) | |
898 | return outlen; | |
899 | else | |
900 | { | |
901 | char psbuf[PEM_BUFSIZE]; | |
902 | unsigned char keybuf[20]; | |
a0156a92 DSH |
903 | int enctmplen, inlen; |
904 | if (cb) | |
905 | inlen=cb(psbuf,PEM_BUFSIZE,1,u); | |
906 | else | |
907 | inlen=PEM_def_callback(psbuf,PEM_BUFSIZE,1,u); | |
908 | if (inlen <= 0) | |
909 | { | |
910 | PEMerr(PEM_F_I2B_PVK,PEM_R_BAD_PASSWORD_READ); | |
911 | goto error; | |
912 | } | |
8a616a5a RL |
913 | if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN, |
914 | (unsigned char *)psbuf, inlen)) | |
a0156a92 DSH |
915 | goto error; |
916 | if (enclevel == 1) | |
917 | memset(keybuf + 5, 0, 11); | |
918 | p = salt + PVK_SALTLEN + 8; | |
b6dcdbfc DSH |
919 | if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL)) |
920 | goto error; | |
a0156a92 | 921 | OPENSSL_cleanse(keybuf, 20); |
b6dcdbfc DSH |
922 | if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8)) |
923 | goto error; | |
924 | if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen)) | |
925 | goto error; | |
a0156a92 | 926 | } |
b6dcdbfc | 927 | EVP_CIPHER_CTX_cleanup(&cctx); |
a0156a92 DSH |
928 | return outlen; |
929 | ||
930 | error: | |
b6dcdbfc | 931 | EVP_CIPHER_CTX_cleanup(&cctx); |
a0156a92 DSH |
932 | return -1; |
933 | } | |
934 | ||
935 | int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, | |
936 | pem_password_cb *cb, void *u) | |
937 | { | |
938 | unsigned char *tmp = NULL; | |
939 | int outlen, wrlen; | |
940 | outlen = i2b_PVK(&tmp, pk, enclevel, cb, u); | |
941 | if (outlen < 0) | |
942 | return -1; | |
943 | wrlen = BIO_write(out, tmp, outlen); | |
944 | OPENSSL_free(tmp); | |
945 | if (wrlen == outlen) | |
946 | { | |
947 | PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE); | |
948 | return outlen; | |
949 | } | |
950 | return -1; | |
951 | } | |
00a37b5a DSH |
952 | |
953 | #endif | |
954 | ||
d4f0339c | 955 | #endif |