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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> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
adbc603d DSH |
61 | #include <openssl/x509.h> |
62 | #include <openssl/asn1.h> | |
0aeddcfa | 63 | #include "dh_locl.h" |
1e26a8ba | 64 | #include <openssl/bn.h> |
5fe736e5 | 65 | #include "internal/asn1_int.h" |
3aeb9348 | 66 | #include "internal/evp_int.h" |
3c27208f | 67 | #include <openssl/cms.h> |
adbc603d | 68 | |
0f113f3e MC |
69 | /* |
70 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
71 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
72 | */ |
73 | ||
0f113f3e MC |
74 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
75 | long length) | |
76 | { | |
77 | if (pkey->ameth == &dhx_asn1_meth) | |
78 | return d2i_DHxparams(NULL, pp, length); | |
79 | return d2i_DHparams(NULL, pp, length); | |
80 | } | |
afb14cda DSH |
81 | |
82 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
83 | { |
84 | if (pkey->ameth == &dhx_asn1_meth) | |
85 | return i2d_DHxparams(a, pp); | |
86 | return i2d_DHparams(a, pp); | |
87 | } | |
afb14cda | 88 | |
adbc603d | 89 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
90 | { |
91 | DH_free(pkey->pkey.dh); | |
92 | } | |
adbc603d | 93 | |
ceb46789 | 94 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
95 | { |
96 | const unsigned char *p, *pm; | |
97 | int pklen, pmlen; | |
98 | int ptype; | |
99 | void *pval; | |
100 | ASN1_STRING *pstr; | |
101 | X509_ALGOR *palg; | |
102 | ASN1_INTEGER *public_key = NULL; | |
103 | ||
104 | DH *dh = NULL; | |
105 | ||
106 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
107 | return 0; | |
108 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
109 | ||
110 | if (ptype != V_ASN1_SEQUENCE) { | |
111 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
112 | goto err; | |
113 | } | |
114 | ||
115 | pstr = pval; | |
116 | pm = pstr->data; | |
117 | pmlen = pstr->length; | |
118 | ||
75ebbd9a | 119 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
120 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
121 | goto err; | |
122 | } | |
123 | ||
75ebbd9a | 124 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
125 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
126 | goto err; | |
127 | } | |
128 | ||
129 | /* We have parameters now set public key */ | |
75ebbd9a | 130 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
131 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
132 | goto err; | |
133 | } | |
134 | ||
135 | ASN1_INTEGER_free(public_key); | |
136 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
137 | return 1; | |
138 | ||
139 | err: | |
2ace7450 | 140 | ASN1_INTEGER_free(public_key); |
d6407083 | 141 | DH_free(dh); |
0f113f3e | 142 | return 0; |
4c97a04e | 143 | |
0f113f3e | 144 | } |
4c97a04e | 145 | |
0f113f3e MC |
146 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
147 | { | |
148 | DH *dh; | |
0f113f3e MC |
149 | int ptype; |
150 | unsigned char *penc = NULL; | |
151 | int penclen; | |
152 | ASN1_STRING *str; | |
153 | ASN1_INTEGER *pub_key = NULL; | |
154 | ||
155 | dh = pkey->pkey.dh; | |
156 | ||
157 | str = ASN1_STRING_new(); | |
90945fa3 | 158 | if (str == NULL) { |
6aa8dab2 MC |
159 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
160 | goto err; | |
161 | } | |
0f113f3e MC |
162 | str->length = i2d_dhp(pkey, dh, &str->data); |
163 | if (str->length <= 0) { | |
164 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
165 | goto err; | |
166 | } | |
0f113f3e MC |
167 | ptype = V_ASN1_SEQUENCE; |
168 | ||
169 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
170 | if (!pub_key) | |
171 | goto err; | |
172 | ||
173 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
174 | ||
175 | ASN1_INTEGER_free(pub_key); | |
176 | ||
177 | if (penclen <= 0) { | |
178 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
179 | goto err; | |
180 | } | |
181 | ||
182 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 183 | ptype, str, penc, penclen)) |
0f113f3e MC |
184 | return 1; |
185 | ||
186 | err: | |
b548a1f1 | 187 | OPENSSL_free(penc); |
0dfb9398 | 188 | ASN1_STRING_free(str); |
0f113f3e MC |
189 | |
190 | return 0; | |
191 | } | |
4c97a04e | 192 | |
0f113f3e MC |
193 | /* |
194 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
195 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 196 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 197 | */ |
4c97a04e | 198 | |
0f113f3e MC |
199 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
200 | { | |
201 | const unsigned char *p, *pm; | |
202 | int pklen, pmlen; | |
203 | int ptype; | |
204 | void *pval; | |
205 | ASN1_STRING *pstr; | |
206 | X509_ALGOR *palg; | |
207 | ASN1_INTEGER *privkey = NULL; | |
208 | ||
209 | DH *dh = NULL; | |
210 | ||
211 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
212 | return 0; | |
213 | ||
214 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
215 | ||
216 | if (ptype != V_ASN1_SEQUENCE) | |
217 | goto decerr; | |
75ebbd9a | 218 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
219 | goto decerr; |
220 | ||
221 | pstr = pval; | |
222 | pm = pstr->data; | |
223 | pmlen = pstr->length; | |
75ebbd9a | 224 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 225 | goto decerr; |
75ebbd9a | 226 | |
0f113f3e | 227 | /* We have parameters now set private key */ |
74924dcb RS |
228 | if ((dh->priv_key = BN_secure_new()) == NULL |
229 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
230 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
231 | goto dherr; | |
232 | } | |
233 | /* Calculate public key */ | |
234 | if (!DH_generate_key(dh)) | |
235 | goto dherr; | |
236 | ||
237 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
238 | ||
a8ae0891 | 239 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
240 | |
241 | return 1; | |
242 | ||
243 | decerr: | |
244 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
245 | dherr: | |
246 | DH_free(dh); | |
a8ae0891 | 247 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
248 | return 0; |
249 | } | |
4c97a04e DSH |
250 | |
251 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
252 | { | |
0f113f3e MC |
253 | ASN1_STRING *params = NULL; |
254 | ASN1_INTEGER *prkey = NULL; | |
255 | unsigned char *dp = NULL; | |
256 | int dplen; | |
257 | ||
258 | params = ASN1_STRING_new(); | |
259 | ||
90945fa3 | 260 | if (params == NULL) { |
0f113f3e MC |
261 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
262 | goto err; | |
263 | } | |
264 | ||
265 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
266 | if (params->length <= 0) { | |
267 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
268 | goto err; | |
269 | } | |
270 | params->type = V_ASN1_SEQUENCE; | |
271 | ||
272 | /* Get private key into integer */ | |
273 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
274 | ||
275 | if (!prkey) { | |
276 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
277 | goto err; | |
278 | } | |
279 | ||
280 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
281 | ||
a8ae0891 | 282 | ASN1_STRING_clear_free(prkey); |
1549a265 | 283 | prkey = NULL; |
0f113f3e MC |
284 | |
285 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
286 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
287 | goto err; | |
288 | ||
289 | return 1; | |
290 | ||
291 | err: | |
b548a1f1 | 292 | OPENSSL_free(dp); |
0dfb9398 | 293 | ASN1_STRING_free(params); |
2ace7450 | 294 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 295 | return 0; |
4c97a04e DSH |
296 | } |
297 | ||
3e4585c8 | 298 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
299 | const unsigned char **pder, int derlen) |
300 | { | |
301 | DH *dh; | |
75ebbd9a RS |
302 | |
303 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
304 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
305 | return 0; | |
306 | } | |
307 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
308 | return 1; | |
309 | } | |
3e4585c8 DSH |
310 | |
311 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
312 | { |
313 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
314 | } | |
3e4585c8 | 315 | |
a773b52a | 316 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 317 | { |
66696478 | 318 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 319 | const char *ktype = NULL; |
0f113f3e MC |
320 | BIGNUM *priv_key, *pub_key; |
321 | ||
322 | if (ptype == 2) | |
323 | priv_key = x->priv_key; | |
324 | else | |
325 | priv_key = NULL; | |
326 | ||
327 | if (ptype > 0) | |
328 | pub_key = x->pub_key; | |
329 | else | |
330 | pub_key = NULL; | |
331 | ||
a773b52a | 332 | if (priv_key == NULL && pub_key == NULL) { |
0f113f3e MC |
333 | reason = ERR_R_PASSED_NULL_PARAMETER; |
334 | goto err; | |
335 | } | |
336 | ||
0f113f3e MC |
337 | if (ptype == 2) |
338 | ktype = "DH Private-Key"; | |
339 | else if (ptype == 1) | |
340 | ktype = "DH Public-Key"; | |
341 | else | |
342 | ktype = "DH Parameters"; | |
343 | ||
0f113f3e MC |
344 | BIO_indent(bp, indent, 128); |
345 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
346 | goto err; | |
347 | indent += 4; | |
348 | ||
a773b52a | 349 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 350 | goto err; |
a773b52a | 351 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
352 | goto err; |
353 | ||
a773b52a | 354 | if (!ASN1_bn_print(bp, "prime:", x->p, NULL, indent)) |
0f113f3e | 355 | goto err; |
a773b52a | 356 | if (!ASN1_bn_print(bp, "generator:", x->g, NULL, indent)) |
0f113f3e | 357 | goto err; |
a773b52a | 358 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, NULL, indent)) |
0f113f3e | 359 | goto err; |
a773b52a | 360 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, NULL, indent)) |
0f113f3e MC |
361 | goto err; |
362 | if (x->seed) { | |
363 | int i; | |
364 | BIO_indent(bp, indent, 128); | |
365 | BIO_puts(bp, "seed:"); | |
366 | for (i = 0; i < x->seedlen; i++) { | |
367 | if ((i % 15) == 0) { | |
368 | if (BIO_puts(bp, "\n") <= 0 | |
369 | || !BIO_indent(bp, indent + 4, 128)) | |
370 | goto err; | |
371 | } | |
372 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
373 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
374 | goto err; | |
375 | } | |
376 | if (BIO_write(bp, "\n", 1) <= 0) | |
377 | return (0); | |
378 | } | |
a773b52a | 379 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, NULL, indent)) |
0f113f3e MC |
380 | goto err; |
381 | if (x->length != 0) { | |
382 | BIO_indent(bp, indent, 128); | |
383 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
384 | (int)x->length) <= 0) | |
385 | goto err; | |
386 | } | |
387 | ||
66696478 RS |
388 | return 1; |
389 | ||
0f113f3e | 390 | err: |
66696478 | 391 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 392 | return 0; |
0f113f3e | 393 | } |
3e4585c8 | 394 | |
ceb46789 | 395 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
396 | { |
397 | return (DH_size(pkey->pkey.dh)); | |
398 | } | |
ceb46789 DSH |
399 | |
400 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
401 | { |
402 | return BN_num_bits(pkey->pkey.dh->p); | |
403 | } | |
ceb46789 | 404 | |
2514fa79 | 405 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
406 | { |
407 | return DH_security_bits(pkey->pkey.dh); | |
408 | } | |
2514fa79 | 409 | |
ffb1ac67 | 410 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
411 | { |
412 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
413 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
414 | return 0; | |
415 | else if (a->ameth == &dhx_asn1_meth) { | |
416 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
417 | return 0; | |
418 | } | |
419 | return 1; | |
420 | } | |
ffb1ac67 | 421 | |
d3cc91ee | 422 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
423 | { |
424 | BIGNUM *a; | |
425 | if (src) { | |
426 | a = BN_dup(src); | |
427 | if (!a) | |
428 | return 0; | |
429 | } else | |
430 | a = NULL; | |
23a1d5e9 | 431 | BN_free(*dst); |
0f113f3e MC |
432 | *dst = a; |
433 | return 1; | |
434 | } | |
ceb46789 | 435 | |
d3cc91ee | 436 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
437 | { |
438 | if (is_x942 == -1) | |
439 | is_x942 = ! !from->q; | |
440 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
441 | return 0; | |
442 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
443 | return 0; | |
444 | if (is_x942) { | |
445 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
446 | return 0; | |
447 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
448 | return 0; | |
b548a1f1 RS |
449 | OPENSSL_free(to->seed); |
450 | to->seed = NULL; | |
451 | to->seedlen = 0; | |
0f113f3e | 452 | if (from->seed) { |
7644a9ae | 453 | to->seed = OPENSSL_memdup(from->seed, from->seedlen); |
0f113f3e MC |
454 | if (!to->seed) |
455 | return 0; | |
456 | to->seedlen = from->seedlen; | |
457 | } | |
458 | } else | |
459 | to->length = from->length; | |
460 | return 1; | |
461 | } | |
d3cc91ee DSH |
462 | |
463 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
464 | { |
465 | DH *ret; | |
466 | ret = DH_new(); | |
90945fa3 | 467 | if (ret == NULL) |
0f113f3e MC |
468 | return NULL; |
469 | if (!int_dh_param_copy(ret, dh, -1)) { | |
470 | DH_free(ret); | |
471 | return NULL; | |
472 | } | |
473 | return ret; | |
474 | } | |
d3cc91ee DSH |
475 | |
476 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 477 | { |
2986ecdc DSH |
478 | if (to->pkey.dh == NULL) { |
479 | to->pkey.dh = DH_new(); | |
480 | if (to->pkey.dh == NULL) | |
481 | return 0; | |
482 | } | |
0f113f3e MC |
483 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
484 | from->ameth == &dhx_asn1_meth); | |
485 | } | |
d3cc91ee | 486 | |
ffb1ac67 | 487 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
488 | { |
489 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
490 | return 1; | |
491 | return 0; | |
492 | } | |
ceb46789 DSH |
493 | |
494 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
495 | { |
496 | if (dh_cmp_parameters(a, b) == 0) | |
497 | return 0; | |
498 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
499 | return 0; | |
500 | else | |
501 | return 1; | |
502 | } | |
ceb46789 | 503 | |
3e4585c8 | 504 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
505 | ASN1_PCTX *ctx) |
506 | { | |
a773b52a | 507 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 508 | } |
ceb46789 DSH |
509 | |
510 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
511 | ASN1_PCTX *ctx) |
512 | { | |
a773b52a | 513 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 514 | } |
ceb46789 DSH |
515 | |
516 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
517 | ASN1_PCTX *ctx) |
518 | { | |
a773b52a | 519 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 520 | } |
3e4585c8 DSH |
521 | |
522 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 523 | { |
a773b52a | 524 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 525 | } |
3e4585c8 | 526 | |
bd59f2b9 DSH |
527 | #ifndef OPENSSL_NO_CMS |
528 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
529 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
530 | #endif | |
531 | ||
532 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
533 | { |
534 | switch (op) { | |
bd59f2b9 DSH |
535 | #ifndef OPENSSL_NO_CMS |
536 | ||
0f113f3e MC |
537 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
538 | if (arg1 == 1) | |
539 | return dh_cms_decrypt(arg2); | |
540 | else if (arg1 == 0) | |
541 | return dh_cms_encrypt(arg2); | |
542 | return -2; | |
bd59f2b9 | 543 | |
0f113f3e MC |
544 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
545 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
546 | return 1; | |
bd59f2b9 | 547 | #endif |
0f113f3e MC |
548 | default: |
549 | return -2; | |
550 | } | |
551 | ||
552 | } | |
553 | ||
554 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
555 | EVP_PKEY_DH, | |
556 | EVP_PKEY_DH, | |
557 | 0, | |
558 | ||
559 | "DH", | |
560 | "OpenSSL PKCS#3 DH method", | |
561 | ||
562 | dh_pub_decode, | |
563 | dh_pub_encode, | |
564 | dh_pub_cmp, | |
565 | dh_public_print, | |
566 | ||
567 | dh_priv_decode, | |
568 | dh_priv_encode, | |
569 | dh_private_print, | |
570 | ||
571 | int_dh_size, | |
572 | dh_bits, | |
573 | dh_security_bits, | |
574 | ||
575 | dh_param_decode, | |
576 | dh_param_encode, | |
577 | dh_missing_parameters, | |
578 | dh_copy_parameters, | |
579 | dh_cmp_parameters, | |
580 | dh_param_print, | |
581 | 0, | |
582 | ||
583 | int_dh_free, | |
584 | 0 | |
585 | }; | |
586 | ||
587 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
588 | EVP_PKEY_DHX, | |
589 | EVP_PKEY_DHX, | |
590 | 0, | |
591 | ||
592 | "X9.42 DH", | |
593 | "OpenSSL X9.42 DH method", | |
594 | ||
595 | dh_pub_decode, | |
596 | dh_pub_encode, | |
597 | dh_pub_cmp, | |
598 | dh_public_print, | |
599 | ||
600 | dh_priv_decode, | |
601 | dh_priv_encode, | |
602 | dh_private_print, | |
603 | ||
604 | int_dh_size, | |
605 | dh_bits, | |
606 | dh_security_bits, | |
607 | ||
608 | dh_param_decode, | |
609 | dh_param_encode, | |
610 | dh_missing_parameters, | |
611 | dh_copy_parameters, | |
612 | dh_cmp_parameters, | |
613 | dh_param_print, | |
614 | 0, | |
615 | ||
616 | int_dh_free, | |
617 | dh_pkey_ctrl | |
618 | }; | |
619 | ||
bd59f2b9 DSH |
620 | #ifndef OPENSSL_NO_CMS |
621 | ||
622 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
623 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
624 | { | |
625 | ASN1_OBJECT *aoid; | |
626 | int atype; | |
627 | void *aval; | |
628 | ASN1_INTEGER *public_key = NULL; | |
629 | int rv = 0; | |
630 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
631 | DH *dhpeer = NULL; | |
632 | const unsigned char *p; | |
633 | int plen; | |
634 | ||
635 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
636 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
637 | goto err; | |
638 | /* Only absent parameters allowed in RFC XXXX */ | |
639 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
640 | goto err; | |
641 | ||
642 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
643 | if (!pk) | |
644 | goto err; | |
645 | if (pk->type != EVP_PKEY_DHX) | |
646 | goto err; | |
647 | /* Get parameters from parent key */ | |
648 | dhpeer = DHparams_dup(pk->pkey.dh); | |
649 | /* We have parameters now set public key */ | |
650 | plen = ASN1_STRING_length(pubkey); | |
651 | p = ASN1_STRING_data(pubkey); | |
652 | if (!p || !plen) | |
653 | goto err; | |
654 | ||
75ebbd9a | 655 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
656 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
657 | goto err; | |
658 | } | |
659 | ||
660 | /* We have parameters now set public key */ | |
75ebbd9a | 661 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
662 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
663 | goto err; | |
664 | } | |
665 | ||
666 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 667 | if (pkpeer == NULL) |
0f113f3e MC |
668 | goto err; |
669 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
670 | dhpeer = NULL; | |
671 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
672 | rv = 1; | |
673 | err: | |
2ace7450 | 674 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 675 | EVP_PKEY_free(pkpeer); |
d6407083 | 676 | DH_free(dhpeer); |
0f113f3e MC |
677 | return rv; |
678 | } | |
bd59f2b9 DSH |
679 | |
680 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
681 | { |
682 | int rv = 0; | |
683 | ||
684 | X509_ALGOR *alg, *kekalg = NULL; | |
685 | ASN1_OCTET_STRING *ukm; | |
686 | const unsigned char *p; | |
687 | unsigned char *dukm = NULL; | |
688 | size_t dukmlen = 0; | |
689 | int keylen, plen; | |
690 | const EVP_CIPHER *kekcipher; | |
691 | EVP_CIPHER_CTX *kekctx; | |
692 | ||
693 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
694 | goto err; | |
695 | ||
696 | /* | |
697 | * For DH we only have one OID permissible. If ever any more get defined | |
698 | * we will need something cleverer. | |
699 | */ | |
700 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
701 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
702 | goto err; | |
703 | } | |
704 | ||
705 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
706 | goto err; | |
707 | ||
708 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
709 | goto err; | |
710 | ||
711 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
712 | goto err; | |
713 | ||
714 | p = alg->parameter->value.sequence->data; | |
715 | plen = alg->parameter->value.sequence->length; | |
716 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
717 | if (!kekalg) | |
718 | goto err; | |
719 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
720 | if (!kekctx) | |
721 | goto err; | |
722 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
723 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
724 | goto err; | |
725 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
726 | goto err; | |
727 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
728 | goto err; | |
729 | ||
730 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
731 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
732 | goto err; | |
733 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
734 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
735 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
736 | <= 0) | |
737 | goto err; | |
738 | ||
739 | if (ukm) { | |
740 | dukmlen = ASN1_STRING_length(ukm); | |
7644a9ae | 741 | dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen); |
0f113f3e MC |
742 | if (!dukm) |
743 | goto err; | |
744 | } | |
745 | ||
746 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
747 | goto err; | |
748 | dukm = NULL; | |
749 | ||
750 | rv = 1; | |
751 | err: | |
222561fe RS |
752 | X509_ALGOR_free(kekalg); |
753 | OPENSSL_free(dukm); | |
0f113f3e MC |
754 | return rv; |
755 | } | |
bd59f2b9 DSH |
756 | |
757 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
758 | { |
759 | EVP_PKEY_CTX *pctx; | |
760 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
761 | if (!pctx) | |
762 | return 0; | |
763 | /* See if we need to set peer key */ | |
764 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
765 | X509_ALGOR *alg; | |
766 | ASN1_BIT_STRING *pubkey; | |
767 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
768 | NULL, NULL, NULL)) | |
769 | return 0; | |
770 | if (!alg || !pubkey) | |
771 | return 0; | |
772 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
773 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
774 | return 0; | |
775 | } | |
776 | } | |
777 | /* Set DH derivation parameters and initialise unwrap context */ | |
778 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
779 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
780 | return 0; | |
781 | } | |
782 | return 1; | |
783 | } | |
bd59f2b9 DSH |
784 | |
785 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
786 | { |
787 | EVP_PKEY_CTX *pctx; | |
788 | EVP_PKEY *pkey; | |
789 | EVP_CIPHER_CTX *ctx; | |
790 | int keylen; | |
791 | X509_ALGOR *talg, *wrap_alg = NULL; | |
792 | ASN1_OBJECT *aoid; | |
793 | ASN1_BIT_STRING *pubkey; | |
794 | ASN1_STRING *wrap_str; | |
795 | ASN1_OCTET_STRING *ukm; | |
796 | unsigned char *penc = NULL, *dukm = NULL; | |
797 | int penclen; | |
798 | size_t dukmlen = 0; | |
799 | int rv = 0; | |
800 | int kdf_type, wrap_nid; | |
801 | const EVP_MD *kdf_md; | |
802 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
803 | if (!pctx) | |
804 | return 0; | |
805 | /* Get ephemeral key */ | |
806 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
807 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
808 | NULL, NULL, NULL)) | |
809 | goto err; | |
810 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
811 | /* Is everything uninitialised? */ | |
812 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 813 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
0f113f3e MC |
814 | if (!pubk) |
815 | goto err; | |
816 | /* Set the key */ | |
817 | ||
818 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
819 | ASN1_INTEGER_free(pubk); | |
820 | if (penclen <= 0) | |
821 | goto err; | |
822 | ASN1_STRING_set0(pubkey, penc, penclen); | |
823 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
824 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
825 | ||
826 | penc = NULL; | |
827 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
828 | V_ASN1_UNDEF, NULL); | |
829 | } | |
830 | ||
0d4fb843 | 831 | /* See if custom parameters set */ |
0f113f3e MC |
832 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
833 | if (kdf_type <= 0) | |
834 | goto err; | |
835 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
836 | goto err; | |
837 | ||
838 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
839 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
840 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
841 | goto err; | |
842 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
843 | /* Unknown KDF */ | |
844 | goto err; | |
845 | if (kdf_md == NULL) { | |
846 | /* Only SHA1 supported */ | |
847 | kdf_md = EVP_sha1(); | |
848 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
849 | goto err; | |
850 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
851 | /* Unsupported digest */ | |
852 | goto err; | |
853 | ||
854 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
855 | goto err; | |
856 | ||
857 | /* Get wrap NID */ | |
858 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
859 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
860 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
861 | goto err; | |
862 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
863 | ||
864 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
865 | ||
866 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 867 | if (wrap_alg == NULL) |
0f113f3e MC |
868 | goto err; |
869 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
870 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 871 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
872 | goto err; |
873 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
874 | goto err; | |
875 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
876 | ASN1_TYPE_free(wrap_alg->parameter); | |
877 | wrap_alg->parameter = NULL; | |
878 | } | |
879 | ||
880 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
881 | goto err; | |
882 | ||
883 | if (ukm) { | |
884 | dukmlen = ASN1_STRING_length(ukm); | |
7644a9ae | 885 | dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen); |
0f113f3e MC |
886 | if (!dukm) |
887 | goto err; | |
888 | } | |
889 | ||
890 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
891 | goto err; | |
892 | dukm = NULL; | |
893 | ||
894 | /* | |
895 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
896 | * of another AlgorithmIdentifier. | |
897 | */ | |
898 | penc = NULL; | |
899 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
900 | if (!penc || !penclen) | |
901 | goto err; | |
902 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 903 | if (wrap_str == NULL) |
0f113f3e MC |
904 | goto err; |
905 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
906 | penc = NULL; | |
907 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
908 | V_ASN1_SEQUENCE, wrap_str); | |
909 | ||
910 | rv = 1; | |
911 | ||
912 | err: | |
222561fe RS |
913 | OPENSSL_free(penc); |
914 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
915 | return rv; |
916 | } | |
bd59f2b9 DSH |
917 | |
918 | #endif |