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Commit | Line | Data |
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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2006. | |
adbc603d DSH |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 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. |
adbc603d 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 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
61 | #include <openssl/x509.h> | |
62 | #include <openssl/asn1.h> | |
63 | #include <openssl/dh.h> | |
1e26a8ba | 64 | #include <openssl/bn.h> |
18e377b4 | 65 | #include "asn1_locl.h" |
bd59f2b9 | 66 | #ifndef OPENSSL_NO_CMS |
0f113f3e | 67 | # include <openssl/cms.h> |
bd59f2b9 | 68 | #endif |
adbc603d | 69 | |
afb14cda DSH |
70 | extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth; |
71 | ||
0f113f3e MC |
72 | /* |
73 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
74 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
75 | */ |
76 | ||
0f113f3e MC |
77 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
78 | long length) | |
79 | { | |
80 | if (pkey->ameth == &dhx_asn1_meth) | |
81 | return d2i_DHxparams(NULL, pp, length); | |
82 | return d2i_DHparams(NULL, pp, length); | |
83 | } | |
afb14cda DSH |
84 | |
85 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
86 | { |
87 | if (pkey->ameth == &dhx_asn1_meth) | |
88 | return i2d_DHxparams(a, pp); | |
89 | return i2d_DHparams(a, pp); | |
90 | } | |
afb14cda | 91 | |
adbc603d | 92 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
93 | { |
94 | DH_free(pkey->pkey.dh); | |
95 | } | |
adbc603d | 96 | |
ceb46789 | 97 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
98 | { |
99 | const unsigned char *p, *pm; | |
100 | int pklen, pmlen; | |
101 | int ptype; | |
102 | void *pval; | |
103 | ASN1_STRING *pstr; | |
104 | X509_ALGOR *palg; | |
105 | ASN1_INTEGER *public_key = NULL; | |
106 | ||
107 | DH *dh = NULL; | |
108 | ||
109 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
110 | return 0; | |
111 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
112 | ||
113 | if (ptype != V_ASN1_SEQUENCE) { | |
114 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
115 | goto err; | |
116 | } | |
117 | ||
118 | pstr = pval; | |
119 | pm = pstr->data; | |
120 | pmlen = pstr->length; | |
121 | ||
122 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) { | |
123 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
124 | goto err; | |
125 | } | |
126 | ||
127 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { | |
128 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
129 | goto err; | |
130 | } | |
131 | ||
132 | /* We have parameters now set public key */ | |
133 | if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
134 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); | |
135 | goto err; | |
136 | } | |
137 | ||
138 | ASN1_INTEGER_free(public_key); | |
139 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
140 | return 1; | |
141 | ||
142 | err: | |
143 | if (public_key) | |
144 | ASN1_INTEGER_free(public_key); | |
145 | if (dh) | |
146 | DH_free(dh); | |
147 | return 0; | |
4c97a04e | 148 | |
0f113f3e | 149 | } |
4c97a04e | 150 | |
0f113f3e MC |
151 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
152 | { | |
153 | DH *dh; | |
154 | void *pval = NULL; | |
155 | int ptype; | |
156 | unsigned char *penc = NULL; | |
157 | int penclen; | |
158 | ASN1_STRING *str; | |
159 | ASN1_INTEGER *pub_key = NULL; | |
160 | ||
161 | dh = pkey->pkey.dh; | |
162 | ||
163 | str = ASN1_STRING_new(); | |
164 | str->length = i2d_dhp(pkey, dh, &str->data); | |
165 | if (str->length <= 0) { | |
166 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
167 | goto err; | |
168 | } | |
169 | pval = str; | |
170 | ptype = V_ASN1_SEQUENCE; | |
171 | ||
172 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
173 | if (!pub_key) | |
174 | goto err; | |
175 | ||
176 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
177 | ||
178 | ASN1_INTEGER_free(pub_key); | |
179 | ||
180 | if (penclen <= 0) { | |
181 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
182 | goto err; | |
183 | } | |
184 | ||
185 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
186 | ptype, pval, penc, penclen)) | |
187 | return 1; | |
188 | ||
189 | err: | |
190 | if (penc) | |
191 | OPENSSL_free(penc); | |
192 | if (pval) | |
193 | ASN1_STRING_free(pval); | |
194 | ||
195 | return 0; | |
196 | } | |
4c97a04e | 197 | |
0f113f3e MC |
198 | /* |
199 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
200 | * the AlgorithmIdentifier contains the parameters, the private key is | |
201 | * explcitly included and the pubkey must be recalculated. | |
202 | */ | |
4c97a04e | 203 | |
0f113f3e MC |
204 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
205 | { | |
206 | const unsigned char *p, *pm; | |
207 | int pklen, pmlen; | |
208 | int ptype; | |
209 | void *pval; | |
210 | ASN1_STRING *pstr; | |
211 | X509_ALGOR *palg; | |
212 | ASN1_INTEGER *privkey = NULL; | |
213 | ||
214 | DH *dh = NULL; | |
215 | ||
216 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
217 | return 0; | |
218 | ||
219 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
220 | ||
221 | if (ptype != V_ASN1_SEQUENCE) | |
222 | goto decerr; | |
223 | ||
224 | if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) | |
225 | goto decerr; | |
226 | ||
227 | pstr = pval; | |
228 | pm = pstr->data; | |
229 | pmlen = pstr->length; | |
230 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) | |
231 | goto decerr; | |
232 | /* We have parameters now set private key */ | |
233 | if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { | |
234 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); | |
235 | goto dherr; | |
236 | } | |
237 | /* Calculate public key */ | |
238 | if (!DH_generate_key(dh)) | |
239 | goto dherr; | |
240 | ||
241 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
242 | ||
243 | ASN1_INTEGER_free(privkey); | |
244 | ||
245 | return 1; | |
246 | ||
247 | decerr: | |
248 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
249 | dherr: | |
250 | DH_free(dh); | |
edac5dc2 | 251 | ASN1_INTEGER_free(privkey); |
0f113f3e MC |
252 | return 0; |
253 | } | |
4c97a04e DSH |
254 | |
255 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
256 | { | |
0f113f3e MC |
257 | ASN1_STRING *params = NULL; |
258 | ASN1_INTEGER *prkey = NULL; | |
259 | unsigned char *dp = NULL; | |
260 | int dplen; | |
261 | ||
262 | params = ASN1_STRING_new(); | |
263 | ||
264 | if (!params) { | |
265 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
266 | goto err; | |
267 | } | |
268 | ||
269 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
270 | if (params->length <= 0) { | |
271 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
272 | goto err; | |
273 | } | |
274 | params->type = V_ASN1_SEQUENCE; | |
275 | ||
276 | /* Get private key into integer */ | |
277 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
278 | ||
279 | if (!prkey) { | |
280 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
281 | goto err; | |
282 | } | |
283 | ||
284 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
285 | ||
286 | ASN1_INTEGER_free(prkey); | |
1549a265 | 287 | prkey = NULL; |
0f113f3e MC |
288 | |
289 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
290 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
291 | goto err; | |
292 | ||
293 | return 1; | |
294 | ||
295 | err: | |
296 | if (dp != NULL) | |
297 | OPENSSL_free(dp); | |
298 | if (params != NULL) | |
299 | ASN1_STRING_free(params); | |
300 | if (prkey != NULL) | |
301 | ASN1_INTEGER_free(prkey); | |
302 | return 0; | |
4c97a04e DSH |
303 | } |
304 | ||
ceb46789 | 305 | static void update_buflen(const BIGNUM *b, size_t *pbuflen) |
0f113f3e MC |
306 | { |
307 | size_t i; | |
308 | if (!b) | |
309 | return; | |
310 | if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
311 | *pbuflen = i; | |
312 | } | |
ceb46789 | 313 | |
3e4585c8 | 314 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
315 | const unsigned char **pder, int derlen) |
316 | { | |
317 | DH *dh; | |
318 | if (!(dh = d2i_dhp(pkey, pder, derlen))) { | |
319 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); | |
320 | return 0; | |
321 | } | |
322 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
323 | return 1; | |
324 | } | |
3e4585c8 DSH |
325 | |
326 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
327 | { |
328 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
329 | } | |
3e4585c8 | 330 | |
ceb46789 | 331 | static int do_dh_print(BIO *bp, const DH *x, int indent, |
0f113f3e MC |
332 | ASN1_PCTX *ctx, int ptype) |
333 | { | |
334 | unsigned char *m = NULL; | |
335 | int reason = ERR_R_BUF_LIB, ret = 0; | |
336 | size_t buf_len = 0; | |
337 | ||
338 | const char *ktype = NULL; | |
339 | ||
340 | BIGNUM *priv_key, *pub_key; | |
341 | ||
342 | if (ptype == 2) | |
343 | priv_key = x->priv_key; | |
344 | else | |
345 | priv_key = NULL; | |
346 | ||
347 | if (ptype > 0) | |
348 | pub_key = x->pub_key; | |
349 | else | |
350 | pub_key = NULL; | |
351 | ||
352 | update_buflen(x->p, &buf_len); | |
353 | ||
354 | if (buf_len == 0) { | |
355 | reason = ERR_R_PASSED_NULL_PARAMETER; | |
356 | goto err; | |
357 | } | |
358 | ||
359 | update_buflen(x->g, &buf_len); | |
360 | update_buflen(x->q, &buf_len); | |
361 | update_buflen(x->j, &buf_len); | |
362 | update_buflen(x->counter, &buf_len); | |
363 | update_buflen(pub_key, &buf_len); | |
364 | update_buflen(priv_key, &buf_len); | |
365 | ||
366 | if (ptype == 2) | |
367 | ktype = "DH Private-Key"; | |
368 | else if (ptype == 1) | |
369 | ktype = "DH Public-Key"; | |
370 | else | |
371 | ktype = "DH Parameters"; | |
372 | ||
373 | m = OPENSSL_malloc(buf_len + 10); | |
374 | if (m == NULL) { | |
375 | reason = ERR_R_MALLOC_FAILURE; | |
376 | goto err; | |
377 | } | |
378 | ||
379 | BIO_indent(bp, indent, 128); | |
380 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
381 | goto err; | |
382 | indent += 4; | |
383 | ||
384 | if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent)) | |
385 | goto err; | |
386 | if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent)) | |
387 | goto err; | |
388 | ||
389 | if (!ASN1_bn_print(bp, "prime:", x->p, m, indent)) | |
390 | goto err; | |
391 | if (!ASN1_bn_print(bp, "generator:", x->g, m, indent)) | |
392 | goto err; | |
393 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent)) | |
394 | goto err; | |
395 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent)) | |
396 | goto err; | |
397 | if (x->seed) { | |
398 | int i; | |
399 | BIO_indent(bp, indent, 128); | |
400 | BIO_puts(bp, "seed:"); | |
401 | for (i = 0; i < x->seedlen; i++) { | |
402 | if ((i % 15) == 0) { | |
403 | if (BIO_puts(bp, "\n") <= 0 | |
404 | || !BIO_indent(bp, indent + 4, 128)) | |
405 | goto err; | |
406 | } | |
407 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
408 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
409 | goto err; | |
410 | } | |
411 | if (BIO_write(bp, "\n", 1) <= 0) | |
412 | return (0); | |
413 | } | |
414 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent)) | |
415 | goto err; | |
416 | if (x->length != 0) { | |
417 | BIO_indent(bp, indent, 128); | |
418 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
419 | (int)x->length) <= 0) | |
420 | goto err; | |
421 | } | |
422 | ||
423 | ret = 1; | |
424 | if (0) { | |
425 | err: | |
426 | DHerr(DH_F_DO_DH_PRINT, reason); | |
427 | } | |
428 | if (m != NULL) | |
429 | OPENSSL_free(m); | |
430 | return (ret); | |
431 | } | |
3e4585c8 | 432 | |
ceb46789 | 433 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
434 | { |
435 | return (DH_size(pkey->pkey.dh)); | |
436 | } | |
ceb46789 DSH |
437 | |
438 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
439 | { |
440 | return BN_num_bits(pkey->pkey.dh->p); | |
441 | } | |
ceb46789 | 442 | |
2514fa79 | 443 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
444 | { |
445 | return DH_security_bits(pkey->pkey.dh); | |
446 | } | |
2514fa79 | 447 | |
ffb1ac67 | 448 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
449 | { |
450 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
451 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
452 | return 0; | |
453 | else if (a->ameth == &dhx_asn1_meth) { | |
454 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
455 | return 0; | |
456 | } | |
457 | return 1; | |
458 | } | |
ffb1ac67 | 459 | |
d3cc91ee | 460 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
461 | { |
462 | BIGNUM *a; | |
463 | if (src) { | |
464 | a = BN_dup(src); | |
465 | if (!a) | |
466 | return 0; | |
467 | } else | |
468 | a = NULL; | |
469 | if (*dst) | |
470 | BN_free(*dst); | |
471 | *dst = a; | |
472 | return 1; | |
473 | } | |
ceb46789 | 474 | |
d3cc91ee | 475 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
476 | { |
477 | if (is_x942 == -1) | |
478 | is_x942 = ! !from->q; | |
479 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
480 | return 0; | |
481 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
482 | return 0; | |
483 | if (is_x942) { | |
484 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
485 | return 0; | |
486 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
487 | return 0; | |
488 | if (to->seed) { | |
489 | OPENSSL_free(to->seed); | |
490 | to->seed = NULL; | |
491 | to->seedlen = 0; | |
492 | } | |
493 | if (from->seed) { | |
494 | to->seed = BUF_memdup(from->seed, from->seedlen); | |
495 | if (!to->seed) | |
496 | return 0; | |
497 | to->seedlen = from->seedlen; | |
498 | } | |
499 | } else | |
500 | to->length = from->length; | |
501 | return 1; | |
502 | } | |
d3cc91ee DSH |
503 | |
504 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
505 | { |
506 | DH *ret; | |
507 | ret = DH_new(); | |
508 | if (!ret) | |
509 | return NULL; | |
510 | if (!int_dh_param_copy(ret, dh, -1)) { | |
511 | DH_free(ret); | |
512 | return NULL; | |
513 | } | |
514 | return ret; | |
515 | } | |
d3cc91ee DSH |
516 | |
517 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e MC |
518 | { |
519 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, | |
520 | from->ameth == &dhx_asn1_meth); | |
521 | } | |
d3cc91ee | 522 | |
ffb1ac67 | 523 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
524 | { |
525 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
526 | return 1; | |
527 | return 0; | |
528 | } | |
ceb46789 DSH |
529 | |
530 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
531 | { |
532 | if (dh_cmp_parameters(a, b) == 0) | |
533 | return 0; | |
534 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
535 | return 0; | |
536 | else | |
537 | return 1; | |
538 | } | |
ceb46789 | 539 | |
3e4585c8 | 540 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
541 | ASN1_PCTX *ctx) |
542 | { | |
543 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0); | |
544 | } | |
ceb46789 DSH |
545 | |
546 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
547 | ASN1_PCTX *ctx) |
548 | { | |
549 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1); | |
550 | } | |
ceb46789 DSH |
551 | |
552 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
553 | ASN1_PCTX *ctx) |
554 | { | |
555 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2); | |
556 | } | |
3e4585c8 DSH |
557 | |
558 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e MC |
559 | { |
560 | return do_dh_print(bp, x, 4, NULL, 0); | |
561 | } | |
3e4585c8 | 562 | |
bd59f2b9 DSH |
563 | #ifndef OPENSSL_NO_CMS |
564 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
565 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
566 | #endif | |
567 | ||
568 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
569 | { |
570 | switch (op) { | |
bd59f2b9 DSH |
571 | #ifndef OPENSSL_NO_CMS |
572 | ||
0f113f3e MC |
573 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
574 | if (arg1 == 1) | |
575 | return dh_cms_decrypt(arg2); | |
576 | else if (arg1 == 0) | |
577 | return dh_cms_encrypt(arg2); | |
578 | return -2; | |
bd59f2b9 | 579 | |
0f113f3e MC |
580 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
581 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
582 | return 1; | |
bd59f2b9 | 583 | #endif |
0f113f3e MC |
584 | default: |
585 | return -2; | |
586 | } | |
587 | ||
588 | } | |
589 | ||
590 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
591 | EVP_PKEY_DH, | |
592 | EVP_PKEY_DH, | |
593 | 0, | |
594 | ||
595 | "DH", | |
596 | "OpenSSL PKCS#3 DH method", | |
597 | ||
598 | dh_pub_decode, | |
599 | dh_pub_encode, | |
600 | dh_pub_cmp, | |
601 | dh_public_print, | |
602 | ||
603 | dh_priv_decode, | |
604 | dh_priv_encode, | |
605 | dh_private_print, | |
606 | ||
607 | int_dh_size, | |
608 | dh_bits, | |
609 | dh_security_bits, | |
610 | ||
611 | dh_param_decode, | |
612 | dh_param_encode, | |
613 | dh_missing_parameters, | |
614 | dh_copy_parameters, | |
615 | dh_cmp_parameters, | |
616 | dh_param_print, | |
617 | 0, | |
618 | ||
619 | int_dh_free, | |
620 | 0 | |
621 | }; | |
622 | ||
623 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
624 | EVP_PKEY_DHX, | |
625 | EVP_PKEY_DHX, | |
626 | 0, | |
627 | ||
628 | "X9.42 DH", | |
629 | "OpenSSL X9.42 DH method", | |
630 | ||
631 | dh_pub_decode, | |
632 | dh_pub_encode, | |
633 | dh_pub_cmp, | |
634 | dh_public_print, | |
635 | ||
636 | dh_priv_decode, | |
637 | dh_priv_encode, | |
638 | dh_private_print, | |
639 | ||
640 | int_dh_size, | |
641 | dh_bits, | |
642 | dh_security_bits, | |
643 | ||
644 | dh_param_decode, | |
645 | dh_param_encode, | |
646 | dh_missing_parameters, | |
647 | dh_copy_parameters, | |
648 | dh_cmp_parameters, | |
649 | dh_param_print, | |
650 | 0, | |
651 | ||
652 | int_dh_free, | |
653 | dh_pkey_ctrl | |
654 | }; | |
655 | ||
bd59f2b9 DSH |
656 | #ifndef OPENSSL_NO_CMS |
657 | ||
658 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
659 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
660 | { | |
661 | ASN1_OBJECT *aoid; | |
662 | int atype; | |
663 | void *aval; | |
664 | ASN1_INTEGER *public_key = NULL; | |
665 | int rv = 0; | |
666 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
667 | DH *dhpeer = NULL; | |
668 | const unsigned char *p; | |
669 | int plen; | |
670 | ||
671 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
672 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
673 | goto err; | |
674 | /* Only absent parameters allowed in RFC XXXX */ | |
675 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
676 | goto err; | |
677 | ||
678 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
679 | if (!pk) | |
680 | goto err; | |
681 | if (pk->type != EVP_PKEY_DHX) | |
682 | goto err; | |
683 | /* Get parameters from parent key */ | |
684 | dhpeer = DHparams_dup(pk->pkey.dh); | |
685 | /* We have parameters now set public key */ | |
686 | plen = ASN1_STRING_length(pubkey); | |
687 | p = ASN1_STRING_data(pubkey); | |
688 | if (!p || !plen) | |
689 | goto err; | |
690 | ||
691 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, plen))) { | |
692 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); | |
693 | goto err; | |
694 | } | |
695 | ||
696 | /* We have parameters now set public key */ | |
697 | if (!(dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
698 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); | |
699 | goto err; | |
700 | } | |
701 | ||
702 | pkpeer = EVP_PKEY_new(); | |
703 | if (!pkpeer) | |
704 | goto err; | |
705 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
706 | dhpeer = NULL; | |
707 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
708 | rv = 1; | |
709 | err: | |
710 | if (public_key) | |
711 | ASN1_INTEGER_free(public_key); | |
712 | if (pkpeer) | |
713 | EVP_PKEY_free(pkpeer); | |
714 | if (dhpeer) | |
715 | DH_free(dhpeer); | |
716 | return rv; | |
717 | } | |
bd59f2b9 DSH |
718 | |
719 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
720 | { |
721 | int rv = 0; | |
722 | ||
723 | X509_ALGOR *alg, *kekalg = NULL; | |
724 | ASN1_OCTET_STRING *ukm; | |
725 | const unsigned char *p; | |
726 | unsigned char *dukm = NULL; | |
727 | size_t dukmlen = 0; | |
728 | int keylen, plen; | |
729 | const EVP_CIPHER *kekcipher; | |
730 | EVP_CIPHER_CTX *kekctx; | |
731 | ||
732 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
733 | goto err; | |
734 | ||
735 | /* | |
736 | * For DH we only have one OID permissible. If ever any more get defined | |
737 | * we will need something cleverer. | |
738 | */ | |
739 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
740 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
741 | goto err; | |
742 | } | |
743 | ||
744 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
745 | goto err; | |
746 | ||
747 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
748 | goto err; | |
749 | ||
750 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
751 | goto err; | |
752 | ||
753 | p = alg->parameter->value.sequence->data; | |
754 | plen = alg->parameter->value.sequence->length; | |
755 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
756 | if (!kekalg) | |
757 | goto err; | |
758 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
759 | if (!kekctx) | |
760 | goto err; | |
761 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
762 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
763 | goto err; | |
764 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
765 | goto err; | |
766 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
767 | goto err; | |
768 | ||
769 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
770 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
771 | goto err; | |
772 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
773 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
774 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
775 | <= 0) | |
776 | goto err; | |
777 | ||
778 | if (ukm) { | |
779 | dukmlen = ASN1_STRING_length(ukm); | |
780 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
781 | if (!dukm) | |
782 | goto err; | |
783 | } | |
784 | ||
785 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
786 | goto err; | |
787 | dukm = NULL; | |
788 | ||
789 | rv = 1; | |
790 | err: | |
791 | if (kekalg) | |
792 | X509_ALGOR_free(kekalg); | |
793 | if (dukm) | |
794 | OPENSSL_free(dukm); | |
795 | return rv; | |
796 | } | |
bd59f2b9 DSH |
797 | |
798 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
799 | { |
800 | EVP_PKEY_CTX *pctx; | |
801 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
802 | if (!pctx) | |
803 | return 0; | |
804 | /* See if we need to set peer key */ | |
805 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
806 | X509_ALGOR *alg; | |
807 | ASN1_BIT_STRING *pubkey; | |
808 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
809 | NULL, NULL, NULL)) | |
810 | return 0; | |
811 | if (!alg || !pubkey) | |
812 | return 0; | |
813 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
814 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
815 | return 0; | |
816 | } | |
817 | } | |
818 | /* Set DH derivation parameters and initialise unwrap context */ | |
819 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
820 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
821 | return 0; | |
822 | } | |
823 | return 1; | |
824 | } | |
bd59f2b9 DSH |
825 | |
826 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
827 | { |
828 | EVP_PKEY_CTX *pctx; | |
829 | EVP_PKEY *pkey; | |
830 | EVP_CIPHER_CTX *ctx; | |
831 | int keylen; | |
832 | X509_ALGOR *talg, *wrap_alg = NULL; | |
833 | ASN1_OBJECT *aoid; | |
834 | ASN1_BIT_STRING *pubkey; | |
835 | ASN1_STRING *wrap_str; | |
836 | ASN1_OCTET_STRING *ukm; | |
837 | unsigned char *penc = NULL, *dukm = NULL; | |
838 | int penclen; | |
839 | size_t dukmlen = 0; | |
840 | int rv = 0; | |
841 | int kdf_type, wrap_nid; | |
842 | const EVP_MD *kdf_md; | |
843 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
844 | if (!pctx) | |
845 | return 0; | |
846 | /* Get ephemeral key */ | |
847 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
848 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
849 | NULL, NULL, NULL)) | |
850 | goto err; | |
851 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
852 | /* Is everything uninitialised? */ | |
853 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
854 | ASN1_INTEGER *pubk; | |
855 | pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); | |
856 | if (!pubk) | |
857 | goto err; | |
858 | /* Set the key */ | |
859 | ||
860 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
861 | ASN1_INTEGER_free(pubk); | |
862 | if (penclen <= 0) | |
863 | goto err; | |
864 | ASN1_STRING_set0(pubkey, penc, penclen); | |
865 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
866 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
867 | ||
868 | penc = NULL; | |
869 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
870 | V_ASN1_UNDEF, NULL); | |
871 | } | |
872 | ||
873 | /* See if custom paraneters set */ | |
874 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); | |
875 | if (kdf_type <= 0) | |
876 | goto err; | |
877 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
878 | goto err; | |
879 | ||
880 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
881 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
882 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
883 | goto err; | |
884 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
885 | /* Unknown KDF */ | |
886 | goto err; | |
887 | if (kdf_md == NULL) { | |
888 | /* Only SHA1 supported */ | |
889 | kdf_md = EVP_sha1(); | |
890 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
891 | goto err; | |
892 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
893 | /* Unsupported digest */ | |
894 | goto err; | |
895 | ||
896 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
897 | goto err; | |
898 | ||
899 | /* Get wrap NID */ | |
900 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
901 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
902 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
903 | goto err; | |
904 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
905 | ||
906 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
907 | ||
908 | wrap_alg = X509_ALGOR_new(); | |
909 | if (!wrap_alg) | |
910 | goto err; | |
911 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
912 | wrap_alg->parameter = ASN1_TYPE_new(); | |
913 | if (!wrap_alg->parameter) | |
914 | goto err; | |
915 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
916 | goto err; | |
917 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
918 | ASN1_TYPE_free(wrap_alg->parameter); | |
919 | wrap_alg->parameter = NULL; | |
920 | } | |
921 | ||
922 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
923 | goto err; | |
924 | ||
925 | if (ukm) { | |
926 | dukmlen = ASN1_STRING_length(ukm); | |
927 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
928 | if (!dukm) | |
929 | goto err; | |
930 | } | |
931 | ||
932 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
933 | goto err; | |
934 | dukm = NULL; | |
935 | ||
936 | /* | |
937 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
938 | * of another AlgorithmIdentifier. | |
939 | */ | |
940 | penc = NULL; | |
941 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
942 | if (!penc || !penclen) | |
943 | goto err; | |
944 | wrap_str = ASN1_STRING_new(); | |
945 | if (!wrap_str) | |
946 | goto err; | |
947 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
948 | penc = NULL; | |
949 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
950 | V_ASN1_SEQUENCE, wrap_str); | |
951 | ||
952 | rv = 1; | |
953 | ||
954 | err: | |
955 | if (penc) | |
956 | OPENSSL_free(penc); | |
957 | if (wrap_alg) | |
958 | X509_ALGOR_free(wrap_alg); | |
959 | return rv; | |
960 | } | |
bd59f2b9 DSH |
961 | |
962 | #endif |