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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2005. | |
a0156a92 DSH |
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 | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
a0156a92 DSH |
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 | ||
0f113f3e MC |
59 | /* |
60 | * Support for PVK format keys and related structures (such a PUBLICKEYBLOB | |
a0156a92 DSH |
61 | * and PRIVATEKEYBLOB). |
62 | */ | |
63 | ||
64 | #include "cryptlib.h" | |
65 | #include <openssl/pem.h> | |
66 | #include <openssl/rand.h> | |
1e26a8ba | 67 | #include <openssl/bn.h> |
d4f0339c | 68 | #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_DSA) |
0f113f3e MC |
69 | # include <openssl/dsa.h> |
70 | # include <openssl/rsa.h> | |
a0156a92 | 71 | |
0f113f3e MC |
72 | /* |
73 | * Utility function: read a DWORD (4 byte unsigned integer) in little endian | |
a0156a92 DSH |
74 | * format |
75 | */ | |
76 | ||
77 | static unsigned int read_ledword(const unsigned char **in) | |
0f113f3e MC |
78 | { |
79 | const unsigned char *p = *in; | |
80 | unsigned int ret; | |
81 | ret = *p++; | |
82 | ret |= (*p++ << 8); | |
83 | ret |= (*p++ << 16); | |
84 | ret |= (*p++ << 24); | |
85 | *in = p; | |
86 | return ret; | |
87 | } | |
88 | ||
89 | /* | |
90 | * Read a BIGNUM in little endian format. The docs say that this should take | |
91 | * up bitlen/8 bytes. | |
a0156a92 DSH |
92 | */ |
93 | ||
94 | static int read_lebn(const unsigned char **in, unsigned int nbyte, BIGNUM **r) | |
0f113f3e MC |
95 | { |
96 | const unsigned char *p; | |
97 | unsigned char *tmpbuf, *q; | |
98 | unsigned int i; | |
99 | p = *in + nbyte - 1; | |
100 | tmpbuf = OPENSSL_malloc(nbyte); | |
101 | if (!tmpbuf) | |
102 | return 0; | |
103 | q = tmpbuf; | |
104 | for (i = 0; i < nbyte; i++) | |
105 | *q++ = *p--; | |
106 | *r = BN_bin2bn(tmpbuf, nbyte, NULL); | |
107 | OPENSSL_free(tmpbuf); | |
108 | if (*r) { | |
109 | *in += nbyte; | |
110 | return 1; | |
111 | } else | |
112 | return 0; | |
113 | } | |
a0156a92 DSH |
114 | |
115 | /* Convert private key blob to EVP_PKEY: RSA and DSA keys supported */ | |
116 | ||
0f113f3e MC |
117 | # define MS_PUBLICKEYBLOB 0x6 |
118 | # define MS_PRIVATEKEYBLOB 0x7 | |
119 | # define MS_RSA1MAGIC 0x31415352L | |
120 | # define MS_RSA2MAGIC 0x32415352L | |
121 | # define MS_DSS1MAGIC 0x31535344L | |
122 | # define MS_DSS2MAGIC 0x32535344L | |
a0156a92 | 123 | |
0f113f3e MC |
124 | # define MS_KEYALG_RSA_KEYX 0xa400 |
125 | # define MS_KEYALG_DSS_SIGN 0x2200 | |
a0156a92 | 126 | |
0f113f3e MC |
127 | # define MS_KEYTYPE_KEYX 0x1 |
128 | # define MS_KEYTYPE_SIGN 0x2 | |
a0156a92 DSH |
129 | |
130 | /* The PVK file magic number: seems to spell out "bobsfile", who is Bob? */ | |
0f113f3e | 131 | # define MS_PVKMAGIC 0xb0b5f11eL |
a0156a92 | 132 | /* Salt length for PVK files */ |
0f113f3e | 133 | # define PVK_SALTLEN 0x10 |
a0156a92 DSH |
134 | |
135 | static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length, | |
0f113f3e | 136 | unsigned int bitlen, int ispub); |
a0156a92 | 137 | static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length, |
0f113f3e | 138 | unsigned int bitlen, int ispub); |
a0156a92 DSH |
139 | |
140 | static int do_blob_header(const unsigned char **in, unsigned int length, | |
0f113f3e MC |
141 | unsigned int *pmagic, unsigned int *pbitlen, |
142 | int *pisdss, int *pispub) | |
143 | { | |
144 | const unsigned char *p = *in; | |
145 | if (length < 16) | |
146 | return 0; | |
147 | /* bType */ | |
148 | if (*p == MS_PUBLICKEYBLOB) { | |
149 | if (*pispub == 0) { | |
150 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB); | |
151 | return 0; | |
152 | } | |
153 | *pispub = 1; | |
154 | } else if (*p == MS_PRIVATEKEYBLOB) { | |
155 | if (*pispub == 1) { | |
156 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB); | |
157 | return 0; | |
158 | } | |
159 | *pispub = 0; | |
160 | } else | |
161 | return 0; | |
162 | p++; | |
163 | /* Version */ | |
164 | if (*p++ != 0x2) { | |
165 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_VERSION_NUMBER); | |
166 | return 0; | |
167 | } | |
168 | /* Ignore reserved, aiKeyAlg */ | |
169 | p += 6; | |
170 | *pmagic = read_ledword(&p); | |
171 | *pbitlen = read_ledword(&p); | |
172 | *pisdss = 0; | |
173 | switch (*pmagic) { | |
174 | ||
175 | case MS_DSS1MAGIC: | |
176 | *pisdss = 1; | |
177 | case MS_RSA1MAGIC: | |
178 | if (*pispub == 0) { | |
179 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PRIVATE_KEY_BLOB); | |
180 | return 0; | |
181 | } | |
182 | break; | |
183 | ||
184 | case MS_DSS2MAGIC: | |
185 | *pisdss = 1; | |
186 | case MS_RSA2MAGIC: | |
187 | if (*pispub == 1) { | |
188 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_EXPECTING_PUBLIC_KEY_BLOB); | |
189 | return 0; | |
190 | } | |
191 | break; | |
192 | ||
193 | default: | |
194 | PEMerr(PEM_F_DO_BLOB_HEADER, PEM_R_BAD_MAGIC_NUMBER); | |
195 | return -1; | |
196 | } | |
197 | *in = p; | |
198 | return 1; | |
199 | } | |
a0156a92 DSH |
200 | |
201 | static unsigned int blob_length(unsigned bitlen, int isdss, int ispub) | |
0f113f3e MC |
202 | { |
203 | unsigned int nbyte, hnbyte; | |
204 | nbyte = (bitlen + 7) >> 3; | |
205 | hnbyte = (bitlen + 15) >> 4; | |
206 | if (isdss) { | |
207 | ||
208 | /* | |
209 | * Expected length: 20 for q + 3 components bitlen each + 24 for seed | |
210 | * structure. | |
211 | */ | |
212 | if (ispub) | |
213 | return 44 + 3 * nbyte; | |
214 | /* | |
215 | * Expected length: 20 for q, priv, 2 bitlen components + 24 for seed | |
216 | * structure. | |
217 | */ | |
218 | else | |
219 | return 64 + 2 * nbyte; | |
220 | } else { | |
221 | /* Expected length: 4 for 'e' + 'n' */ | |
222 | if (ispub) | |
223 | return 4 + nbyte; | |
224 | else | |
225 | /* | |
226 | * Expected length: 4 for 'e' and 7 other components. 2 | |
227 | * components are bitlen size, 5 are bitlen/2 | |
228 | */ | |
229 | return 4 + 2 * nbyte + 5 * hnbyte; | |
230 | } | |
231 | ||
232 | } | |
a0156a92 DSH |
233 | |
234 | static EVP_PKEY *do_b2i(const unsigned char **in, unsigned int length, | |
0f113f3e MC |
235 | int ispub) |
236 | { | |
237 | const unsigned char *p = *in; | |
238 | unsigned int bitlen, magic; | |
239 | int isdss; | |
240 | if (do_blob_header(&p, length, &magic, &bitlen, &isdss, &ispub) <= 0) { | |
241 | PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_HEADER_PARSE_ERROR); | |
242 | return NULL; | |
243 | } | |
244 | length -= 16; | |
245 | if (length < blob_length(bitlen, isdss, ispub)) { | |
246 | PEMerr(PEM_F_DO_B2I, PEM_R_KEYBLOB_TOO_SHORT); | |
247 | return NULL; | |
248 | } | |
249 | if (isdss) | |
250 | return b2i_dss(&p, length, bitlen, ispub); | |
251 | else | |
252 | return b2i_rsa(&p, length, bitlen, ispub); | |
253 | } | |
a0156a92 DSH |
254 | |
255 | static EVP_PKEY *do_b2i_bio(BIO *in, int ispub) | |
0f113f3e MC |
256 | { |
257 | const unsigned char *p; | |
258 | unsigned char hdr_buf[16], *buf = NULL; | |
259 | unsigned int bitlen, magic, length; | |
260 | int isdss; | |
261 | EVP_PKEY *ret = NULL; | |
262 | if (BIO_read(in, hdr_buf, 16) != 16) { | |
263 | PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT); | |
264 | return NULL; | |
265 | } | |
266 | p = hdr_buf; | |
267 | if (do_blob_header(&p, 16, &magic, &bitlen, &isdss, &ispub) <= 0) | |
268 | return NULL; | |
269 | ||
270 | length = blob_length(bitlen, isdss, ispub); | |
271 | buf = OPENSSL_malloc(length); | |
272 | if (!buf) { | |
273 | PEMerr(PEM_F_DO_B2I_BIO, ERR_R_MALLOC_FAILURE); | |
274 | goto err; | |
275 | } | |
276 | p = buf; | |
277 | if (BIO_read(in, buf, length) != (int)length) { | |
278 | PEMerr(PEM_F_DO_B2I_BIO, PEM_R_KEYBLOB_TOO_SHORT); | |
279 | goto err; | |
280 | } | |
281 | ||
282 | if (isdss) | |
283 | ret = b2i_dss(&p, length, bitlen, ispub); | |
284 | else | |
285 | ret = b2i_rsa(&p, length, bitlen, ispub); | |
286 | ||
287 | err: | |
b548a1f1 | 288 | OPENSSL_free(buf); |
0f113f3e MC |
289 | return ret; |
290 | } | |
a0156a92 DSH |
291 | |
292 | static EVP_PKEY *b2i_dss(const unsigned char **in, unsigned int length, | |
0f113f3e MC |
293 | unsigned int bitlen, int ispub) |
294 | { | |
295 | const unsigned char *p = *in; | |
296 | EVP_PKEY *ret = NULL; | |
297 | DSA *dsa = NULL; | |
298 | BN_CTX *ctx = NULL; | |
299 | unsigned int nbyte; | |
300 | nbyte = (bitlen + 7) >> 3; | |
301 | ||
302 | dsa = DSA_new(); | |
303 | ret = EVP_PKEY_new(); | |
304 | if (!dsa || !ret) | |
305 | goto memerr; | |
306 | if (!read_lebn(&p, nbyte, &dsa->p)) | |
307 | goto memerr; | |
308 | if (!read_lebn(&p, 20, &dsa->q)) | |
309 | goto memerr; | |
310 | if (!read_lebn(&p, nbyte, &dsa->g)) | |
311 | goto memerr; | |
312 | if (ispub) { | |
313 | if (!read_lebn(&p, nbyte, &dsa->pub_key)) | |
314 | goto memerr; | |
315 | } else { | |
316 | if (!read_lebn(&p, 20, &dsa->priv_key)) | |
317 | goto memerr; | |
318 | /* Calculate public key */ | |
319 | if (!(dsa->pub_key = BN_new())) | |
320 | goto memerr; | |
321 | if (!(ctx = BN_CTX_new())) | |
322 | goto memerr; | |
323 | ||
324 | if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) | |
325 | ||
326 | goto memerr; | |
327 | BN_CTX_free(ctx); | |
328 | } | |
329 | ||
330 | EVP_PKEY_set1_DSA(ret, dsa); | |
331 | DSA_free(dsa); | |
332 | *in = p; | |
333 | return ret; | |
334 | ||
335 | memerr: | |
336 | PEMerr(PEM_F_B2I_DSS, ERR_R_MALLOC_FAILURE); | |
d6407083 | 337 | DSA_free(dsa); |
c5ba2d99 | 338 | EVP_PKEY_free(ret); |
23a1d5e9 | 339 | BN_CTX_free(ctx); |
0f113f3e MC |
340 | return NULL; |
341 | } | |
a0156a92 DSH |
342 | |
343 | static EVP_PKEY *b2i_rsa(const unsigned char **in, unsigned int length, | |
0f113f3e MC |
344 | unsigned int bitlen, int ispub) |
345 | { | |
346 | const unsigned char *p = *in; | |
347 | EVP_PKEY *ret = NULL; | |
348 | RSA *rsa = NULL; | |
349 | unsigned int nbyte, hnbyte; | |
350 | nbyte = (bitlen + 7) >> 3; | |
351 | hnbyte = (bitlen + 15) >> 4; | |
352 | rsa = RSA_new(); | |
353 | ret = EVP_PKEY_new(); | |
354 | if (!rsa || !ret) | |
355 | goto memerr; | |
356 | rsa->e = BN_new(); | |
357 | if (!rsa->e) | |
358 | goto memerr; | |
359 | if (!BN_set_word(rsa->e, read_ledword(&p))) | |
360 | goto memerr; | |
361 | if (!read_lebn(&p, nbyte, &rsa->n)) | |
362 | goto memerr; | |
363 | if (!ispub) { | |
364 | if (!read_lebn(&p, hnbyte, &rsa->p)) | |
365 | goto memerr; | |
366 | if (!read_lebn(&p, hnbyte, &rsa->q)) | |
367 | goto memerr; | |
368 | if (!read_lebn(&p, hnbyte, &rsa->dmp1)) | |
369 | goto memerr; | |
370 | if (!read_lebn(&p, hnbyte, &rsa->dmq1)) | |
371 | goto memerr; | |
372 | if (!read_lebn(&p, hnbyte, &rsa->iqmp)) | |
373 | goto memerr; | |
374 | if (!read_lebn(&p, nbyte, &rsa->d)) | |
375 | goto memerr; | |
376 | } | |
377 | ||
378 | EVP_PKEY_set1_RSA(ret, rsa); | |
379 | RSA_free(rsa); | |
380 | *in = p; | |
381 | return ret; | |
382 | memerr: | |
383 | PEMerr(PEM_F_B2I_RSA, ERR_R_MALLOC_FAILURE); | |
d6407083 | 384 | RSA_free(rsa); |
c5ba2d99 | 385 | EVP_PKEY_free(ret); |
0f113f3e MC |
386 | return NULL; |
387 | } | |
a0156a92 DSH |
388 | |
389 | EVP_PKEY *b2i_PrivateKey(const unsigned char **in, long length) | |
0f113f3e MC |
390 | { |
391 | return do_b2i(in, length, 0); | |
392 | } | |
a0156a92 DSH |
393 | |
394 | EVP_PKEY *b2i_PublicKey(const unsigned char **in, long length) | |
0f113f3e MC |
395 | { |
396 | return do_b2i(in, length, 1); | |
397 | } | |
a0156a92 DSH |
398 | |
399 | EVP_PKEY *b2i_PrivateKey_bio(BIO *in) | |
0f113f3e MC |
400 | { |
401 | return do_b2i_bio(in, 0); | |
402 | } | |
a0156a92 DSH |
403 | |
404 | EVP_PKEY *b2i_PublicKey_bio(BIO *in) | |
0f113f3e MC |
405 | { |
406 | return do_b2i_bio(in, 1); | |
407 | } | |
a0156a92 DSH |
408 | |
409 | static void write_ledword(unsigned char **out, unsigned int dw) | |
0f113f3e MC |
410 | { |
411 | unsigned char *p = *out; | |
412 | *p++ = dw & 0xff; | |
413 | *p++ = (dw >> 8) & 0xff; | |
414 | *p++ = (dw >> 16) & 0xff; | |
415 | *p++ = (dw >> 24) & 0xff; | |
416 | *out = p; | |
417 | } | |
a0156a92 DSH |
418 | |
419 | static void write_lebn(unsigned char **out, const BIGNUM *bn, int len) | |
0f113f3e MC |
420 | { |
421 | int nb, i; | |
422 | unsigned char *p = *out, *q, c; | |
423 | nb = BN_num_bytes(bn); | |
424 | BN_bn2bin(bn, p); | |
425 | q = p + nb - 1; | |
426 | /* In place byte order reversal */ | |
427 | for (i = 0; i < nb / 2; i++) { | |
428 | c = *p; | |
429 | *p++ = *q; | |
430 | *q-- = c; | |
431 | } | |
432 | *out += nb; | |
433 | /* Pad with zeroes if we have to */ | |
434 | if (len > 0) { | |
435 | len -= nb; | |
436 | if (len > 0) { | |
437 | memset(*out, 0, len); | |
438 | *out += len; | |
439 | } | |
440 | } | |
441 | } | |
a0156a92 DSH |
442 | |
443 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *magic); | |
444 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *magic); | |
445 | ||
446 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub); | |
447 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub); | |
0f113f3e | 448 | |
a0156a92 | 449 | static int do_i2b(unsigned char **out, EVP_PKEY *pk, int ispub) |
0f113f3e MC |
450 | { |
451 | unsigned char *p; | |
452 | unsigned int bitlen, magic = 0, keyalg; | |
453 | int outlen, noinc = 0; | |
454 | if (pk->type == EVP_PKEY_DSA) { | |
455 | bitlen = check_bitlen_dsa(pk->pkey.dsa, ispub, &magic); | |
456 | keyalg = MS_KEYALG_DSS_SIGN; | |
457 | } else if (pk->type == EVP_PKEY_RSA) { | |
458 | bitlen = check_bitlen_rsa(pk->pkey.rsa, ispub, &magic); | |
459 | keyalg = MS_KEYALG_RSA_KEYX; | |
460 | } else | |
461 | return -1; | |
462 | if (bitlen == 0) | |
463 | return -1; | |
464 | outlen = 16 + blob_length(bitlen, | |
465 | keyalg == MS_KEYALG_DSS_SIGN ? 1 : 0, ispub); | |
466 | if (out == NULL) | |
467 | return outlen; | |
468 | if (*out) | |
469 | p = *out; | |
470 | else { | |
471 | p = OPENSSL_malloc(outlen); | |
472 | if (!p) | |
473 | return -1; | |
474 | *out = p; | |
475 | noinc = 1; | |
476 | } | |
477 | if (ispub) | |
478 | *p++ = MS_PUBLICKEYBLOB; | |
479 | else | |
480 | *p++ = MS_PRIVATEKEYBLOB; | |
481 | *p++ = 0x2; | |
482 | *p++ = 0; | |
483 | *p++ = 0; | |
484 | write_ledword(&p, keyalg); | |
485 | write_ledword(&p, magic); | |
486 | write_ledword(&p, bitlen); | |
487 | if (keyalg == MS_KEYALG_DSS_SIGN) | |
488 | write_dsa(&p, pk->pkey.dsa, ispub); | |
489 | else | |
490 | write_rsa(&p, pk->pkey.rsa, ispub); | |
491 | if (!noinc) | |
492 | *out += outlen; | |
493 | return outlen; | |
494 | } | |
a0156a92 DSH |
495 | |
496 | static int do_i2b_bio(BIO *out, EVP_PKEY *pk, int ispub) | |
0f113f3e MC |
497 | { |
498 | unsigned char *tmp = NULL; | |
499 | int outlen, wrlen; | |
500 | outlen = do_i2b(&tmp, pk, ispub); | |
501 | if (outlen < 0) | |
502 | return -1; | |
503 | wrlen = BIO_write(out, tmp, outlen); | |
504 | OPENSSL_free(tmp); | |
505 | if (wrlen == outlen) | |
506 | return outlen; | |
507 | return -1; | |
508 | } | |
a0156a92 DSH |
509 | |
510 | static int check_bitlen_dsa(DSA *dsa, int ispub, unsigned int *pmagic) | |
0f113f3e MC |
511 | { |
512 | int bitlen; | |
513 | bitlen = BN_num_bits(dsa->p); | |
514 | if ((bitlen & 7) || (BN_num_bits(dsa->q) != 160) | |
515 | || (BN_num_bits(dsa->g) > bitlen)) | |
516 | goto badkey; | |
517 | if (ispub) { | |
518 | if (BN_num_bits(dsa->pub_key) > bitlen) | |
519 | goto badkey; | |
520 | *pmagic = MS_DSS1MAGIC; | |
521 | } else { | |
522 | if (BN_num_bits(dsa->priv_key) > 160) | |
523 | goto badkey; | |
524 | *pmagic = MS_DSS2MAGIC; | |
525 | } | |
526 | ||
527 | return bitlen; | |
528 | badkey: | |
529 | PEMerr(PEM_F_CHECK_BITLEN_DSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS); | |
530 | return 0; | |
531 | } | |
a0156a92 DSH |
532 | |
533 | static int check_bitlen_rsa(RSA *rsa, int ispub, unsigned int *pmagic) | |
0f113f3e MC |
534 | { |
535 | int nbyte, hnbyte, bitlen; | |
536 | if (BN_num_bits(rsa->e) > 32) | |
537 | goto badkey; | |
538 | bitlen = BN_num_bits(rsa->n); | |
539 | nbyte = BN_num_bytes(rsa->n); | |
540 | hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; | |
541 | if (ispub) { | |
542 | *pmagic = MS_RSA1MAGIC; | |
543 | return bitlen; | |
544 | } else { | |
545 | *pmagic = MS_RSA2MAGIC; | |
546 | /* | |
547 | * For private key each component must fit within nbyte or hnbyte. | |
548 | */ | |
549 | if (BN_num_bytes(rsa->d) > nbyte) | |
550 | goto badkey; | |
551 | if ((BN_num_bytes(rsa->iqmp) > hnbyte) | |
552 | || (BN_num_bytes(rsa->p) > hnbyte) | |
553 | || (BN_num_bytes(rsa->q) > hnbyte) | |
554 | || (BN_num_bytes(rsa->dmp1) > hnbyte) | |
555 | || (BN_num_bytes(rsa->dmq1) > hnbyte)) | |
556 | goto badkey; | |
557 | } | |
558 | return bitlen; | |
559 | badkey: | |
560 | PEMerr(PEM_F_CHECK_BITLEN_RSA, PEM_R_UNSUPPORTED_KEY_COMPONENTS); | |
561 | return 0; | |
562 | } | |
a0156a92 DSH |
563 | |
564 | static void write_rsa(unsigned char **out, RSA *rsa, int ispub) | |
0f113f3e MC |
565 | { |
566 | int nbyte, hnbyte; | |
567 | nbyte = BN_num_bytes(rsa->n); | |
568 | hnbyte = (BN_num_bits(rsa->n) + 15) >> 4; | |
569 | write_lebn(out, rsa->e, 4); | |
570 | write_lebn(out, rsa->n, -1); | |
571 | if (ispub) | |
572 | return; | |
573 | write_lebn(out, rsa->p, hnbyte); | |
574 | write_lebn(out, rsa->q, hnbyte); | |
575 | write_lebn(out, rsa->dmp1, hnbyte); | |
576 | write_lebn(out, rsa->dmq1, hnbyte); | |
577 | write_lebn(out, rsa->iqmp, hnbyte); | |
578 | write_lebn(out, rsa->d, nbyte); | |
579 | } | |
580 | ||
a0156a92 | 581 | static void write_dsa(unsigned char **out, DSA *dsa, int ispub) |
0f113f3e MC |
582 | { |
583 | int nbyte; | |
584 | nbyte = BN_num_bytes(dsa->p); | |
585 | write_lebn(out, dsa->p, nbyte); | |
586 | write_lebn(out, dsa->q, 20); | |
587 | write_lebn(out, dsa->g, nbyte); | |
588 | if (ispub) | |
589 | write_lebn(out, dsa->pub_key, nbyte); | |
590 | else | |
591 | write_lebn(out, dsa->priv_key, 20); | |
592 | /* Set "invalid" for seed structure values */ | |
593 | memset(*out, 0xff, 24); | |
594 | *out += 24; | |
595 | return; | |
596 | } | |
a0156a92 DSH |
597 | |
598 | int i2b_PrivateKey_bio(BIO *out, EVP_PKEY *pk) | |
0f113f3e MC |
599 | { |
600 | return do_i2b_bio(out, pk, 0); | |
601 | } | |
a0156a92 DSH |
602 | |
603 | int i2b_PublicKey_bio(BIO *out, EVP_PKEY *pk) | |
0f113f3e MC |
604 | { |
605 | return do_i2b_bio(out, pk, 1); | |
606 | } | |
a0156a92 | 607 | |
0f113f3e | 608 | # ifndef OPENSSL_NO_RC4 |
00a37b5a | 609 | |
a0156a92 | 610 | static int do_PVK_header(const unsigned char **in, unsigned int length, |
0f113f3e MC |
611 | int skip_magic, |
612 | unsigned int *psaltlen, unsigned int *pkeylen) | |
613 | { | |
614 | const unsigned char *p = *in; | |
615 | unsigned int pvk_magic, is_encrypted; | |
616 | if (skip_magic) { | |
617 | if (length < 20) { | |
618 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT); | |
619 | return 0; | |
620 | } | |
621 | length -= 20; | |
622 | } else { | |
623 | if (length < 24) { | |
624 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_PVK_TOO_SHORT); | |
625 | return 0; | |
626 | } | |
627 | length -= 24; | |
628 | pvk_magic = read_ledword(&p); | |
629 | if (pvk_magic != MS_PVKMAGIC) { | |
630 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_BAD_MAGIC_NUMBER); | |
631 | return 0; | |
632 | } | |
633 | } | |
634 | /* Skip reserved */ | |
635 | p += 4; | |
636 | /* | |
637 | * keytype = | |
638 | */ read_ledword(&p); | |
639 | is_encrypted = read_ledword(&p); | |
640 | *psaltlen = read_ledword(&p); | |
641 | *pkeylen = read_ledword(&p); | |
642 | ||
643 | if (is_encrypted && !*psaltlen) { | |
644 | PEMerr(PEM_F_DO_PVK_HEADER, PEM_R_INCONSISTENT_HEADER); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | *in = p; | |
649 | return 1; | |
650 | } | |
651 | ||
652 | static int derive_pvk_key(unsigned char *key, | |
653 | const unsigned char *salt, unsigned int saltlen, | |
654 | const unsigned char *pass, int passlen) | |
655 | { | |
656 | EVP_MD_CTX mctx; | |
657 | int rv = 1; | |
658 | EVP_MD_CTX_init(&mctx); | |
659 | if (!EVP_DigestInit_ex(&mctx, EVP_sha1(), NULL) | |
660 | || !EVP_DigestUpdate(&mctx, salt, saltlen) | |
661 | || !EVP_DigestUpdate(&mctx, pass, passlen) | |
662 | || !EVP_DigestFinal_ex(&mctx, key, NULL)) | |
663 | rv = 0; | |
664 | ||
665 | EVP_MD_CTX_cleanup(&mctx); | |
666 | return rv; | |
667 | } | |
a0156a92 DSH |
668 | |
669 | static EVP_PKEY *do_PVK_body(const unsigned char **in, | |
0f113f3e MC |
670 | unsigned int saltlen, unsigned int keylen, |
671 | pem_password_cb *cb, void *u) | |
672 | { | |
673 | EVP_PKEY *ret = NULL; | |
674 | const unsigned char *p = *in; | |
675 | unsigned int magic; | |
676 | unsigned char *enctmp = NULL, *q; | |
25aaa98a | 677 | |
0f113f3e MC |
678 | EVP_CIPHER_CTX cctx; |
679 | EVP_CIPHER_CTX_init(&cctx); | |
680 | if (saltlen) { | |
681 | char psbuf[PEM_BUFSIZE]; | |
682 | unsigned char keybuf[20]; | |
683 | int enctmplen, inlen; | |
684 | if (cb) | |
685 | inlen = cb(psbuf, PEM_BUFSIZE, 0, u); | |
686 | else | |
687 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); | |
688 | if (inlen <= 0) { | |
689 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_PASSWORD_READ); | |
690 | return NULL; | |
691 | } | |
692 | enctmp = OPENSSL_malloc(keylen + 8); | |
693 | if (!enctmp) { | |
694 | PEMerr(PEM_F_DO_PVK_BODY, ERR_R_MALLOC_FAILURE); | |
695 | return NULL; | |
696 | } | |
697 | if (!derive_pvk_key(keybuf, p, saltlen, | |
698 | (unsigned char *)psbuf, inlen)) | |
699 | return NULL; | |
700 | p += saltlen; | |
701 | /* Copy BLOBHEADER across, decrypt rest */ | |
702 | memcpy(enctmp, p, 8); | |
703 | p += 8; | |
704 | if (keylen < 8) { | |
705 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_PVK_TOO_SHORT); | |
706 | return NULL; | |
707 | } | |
708 | inlen = keylen - 8; | |
709 | q = enctmp + 8; | |
710 | if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL)) | |
711 | goto err; | |
712 | if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen)) | |
713 | goto err; | |
714 | if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen)) | |
715 | goto err; | |
716 | magic = read_ledword((const unsigned char **)&q); | |
717 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) { | |
718 | q = enctmp + 8; | |
719 | memset(keybuf + 5, 0, 11); | |
720 | if (!EVP_DecryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL)) | |
721 | goto err; | |
722 | OPENSSL_cleanse(keybuf, 20); | |
723 | if (!EVP_DecryptUpdate(&cctx, q, &enctmplen, p, inlen)) | |
724 | goto err; | |
725 | if (!EVP_DecryptFinal_ex(&cctx, q + enctmplen, &enctmplen)) | |
726 | goto err; | |
727 | magic = read_ledword((const unsigned char **)&q); | |
728 | if (magic != MS_RSA2MAGIC && magic != MS_DSS2MAGIC) { | |
729 | PEMerr(PEM_F_DO_PVK_BODY, PEM_R_BAD_DECRYPT); | |
730 | goto err; | |
731 | } | |
732 | } else | |
733 | OPENSSL_cleanse(keybuf, 20); | |
734 | p = enctmp; | |
735 | } | |
736 | ||
737 | ret = b2i_PrivateKey(&p, keylen); | |
738 | err: | |
739 | EVP_CIPHER_CTX_cleanup(&cctx); | |
25aaa98a | 740 | OPENSSL_free(enctmp); |
0f113f3e MC |
741 | return ret; |
742 | } | |
a0156a92 DSH |
743 | |
744 | EVP_PKEY *b2i_PVK_bio(BIO *in, pem_password_cb *cb, void *u) | |
0f113f3e MC |
745 | { |
746 | unsigned char pvk_hdr[24], *buf = NULL; | |
747 | const unsigned char *p; | |
748 | int buflen; | |
749 | EVP_PKEY *ret = NULL; | |
750 | unsigned int saltlen, keylen; | |
751 | if (BIO_read(in, pvk_hdr, 24) != 24) { | |
752 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT); | |
753 | return NULL; | |
754 | } | |
755 | p = pvk_hdr; | |
756 | ||
757 | if (!do_PVK_header(&p, 24, 0, &saltlen, &keylen)) | |
758 | return 0; | |
759 | buflen = (int)keylen + saltlen; | |
760 | buf = OPENSSL_malloc(buflen); | |
761 | if (!buf) { | |
762 | PEMerr(PEM_F_B2I_PVK_BIO, ERR_R_MALLOC_FAILURE); | |
763 | return 0; | |
764 | } | |
765 | p = buf; | |
766 | if (BIO_read(in, buf, buflen) != buflen) { | |
767 | PEMerr(PEM_F_B2I_PVK_BIO, PEM_R_PVK_DATA_TOO_SHORT); | |
768 | goto err; | |
769 | } | |
770 | ret = do_PVK_body(&p, saltlen, keylen, cb, u); | |
771 | ||
772 | err: | |
4b45c6e5 | 773 | OPENSSL_clear_free(buf, buflen); |
0f113f3e MC |
774 | return ret; |
775 | } | |
776 | ||
777 | static int i2b_PVK(unsigned char **out, EVP_PKEY *pk, int enclevel, | |
778 | pem_password_cb *cb, void *u) | |
779 | { | |
780 | int outlen = 24, pklen; | |
781 | unsigned char *p, *salt = NULL; | |
782 | EVP_CIPHER_CTX cctx; | |
783 | EVP_CIPHER_CTX_init(&cctx); | |
784 | if (enclevel) | |
785 | outlen += PVK_SALTLEN; | |
786 | pklen = do_i2b(NULL, pk, 0); | |
787 | if (pklen < 0) | |
788 | return -1; | |
789 | outlen += pklen; | |
790 | if (!out) | |
791 | return outlen; | |
792 | if (*out) | |
793 | p = *out; | |
794 | else { | |
795 | p = OPENSSL_malloc(outlen); | |
796 | if (!p) { | |
797 | PEMerr(PEM_F_I2B_PVK, ERR_R_MALLOC_FAILURE); | |
798 | return -1; | |
799 | } | |
800 | *out = p; | |
801 | } | |
802 | ||
803 | write_ledword(&p, MS_PVKMAGIC); | |
804 | write_ledword(&p, 0); | |
805 | if (pk->type == EVP_PKEY_DSA) | |
806 | write_ledword(&p, MS_KEYTYPE_SIGN); | |
807 | else | |
808 | write_ledword(&p, MS_KEYTYPE_KEYX); | |
809 | write_ledword(&p, enclevel ? 1 : 0); | |
810 | write_ledword(&p, enclevel ? PVK_SALTLEN : 0); | |
811 | write_ledword(&p, pklen); | |
812 | if (enclevel) { | |
813 | if (RAND_bytes(p, PVK_SALTLEN) <= 0) | |
814 | goto error; | |
815 | salt = p; | |
816 | p += PVK_SALTLEN; | |
817 | } | |
818 | do_i2b(&p, pk, 0); | |
819 | if (enclevel == 0) | |
820 | return outlen; | |
821 | else { | |
822 | char psbuf[PEM_BUFSIZE]; | |
823 | unsigned char keybuf[20]; | |
824 | int enctmplen, inlen; | |
825 | if (cb) | |
826 | inlen = cb(psbuf, PEM_BUFSIZE, 1, u); | |
827 | else | |
828 | inlen = PEM_def_callback(psbuf, PEM_BUFSIZE, 1, u); | |
829 | if (inlen <= 0) { | |
830 | PEMerr(PEM_F_I2B_PVK, PEM_R_BAD_PASSWORD_READ); | |
831 | goto error; | |
832 | } | |
833 | if (!derive_pvk_key(keybuf, salt, PVK_SALTLEN, | |
834 | (unsigned char *)psbuf, inlen)) | |
835 | goto error; | |
836 | if (enclevel == 1) | |
837 | memset(keybuf + 5, 0, 11); | |
838 | p = salt + PVK_SALTLEN + 8; | |
839 | if (!EVP_EncryptInit_ex(&cctx, EVP_rc4(), NULL, keybuf, NULL)) | |
840 | goto error; | |
841 | OPENSSL_cleanse(keybuf, 20); | |
842 | if (!EVP_DecryptUpdate(&cctx, p, &enctmplen, p, pklen - 8)) | |
843 | goto error; | |
844 | if (!EVP_DecryptFinal_ex(&cctx, p + enctmplen, &enctmplen)) | |
845 | goto error; | |
846 | } | |
847 | EVP_CIPHER_CTX_cleanup(&cctx); | |
848 | return outlen; | |
849 | ||
850 | error: | |
851 | EVP_CIPHER_CTX_cleanup(&cctx); | |
852 | return -1; | |
853 | } | |
a0156a92 DSH |
854 | |
855 | int i2b_PVK_bio(BIO *out, EVP_PKEY *pk, int enclevel, | |
0f113f3e MC |
856 | pem_password_cb *cb, void *u) |
857 | { | |
858 | unsigned char *tmp = NULL; | |
859 | int outlen, wrlen; | |
860 | outlen = i2b_PVK(&tmp, pk, enclevel, cb, u); | |
861 | if (outlen < 0) | |
862 | return -1; | |
863 | wrlen = BIO_write(out, tmp, outlen); | |
864 | OPENSSL_free(tmp); | |
865 | if (wrlen == outlen) { | |
866 | PEMerr(PEM_F_I2B_PVK_BIO, PEM_R_BIO_WRITE_FAILURE); | |
867 | return outlen; | |
868 | } | |
869 | return -1; | |
870 | } | |
871 | ||
872 | # endif | |
00a37b5a | 873 | |
d4f0339c | 874 | #endif |