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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> | |
63 | #include <openssl/dh.h> | |
1e26a8ba | 64 | #include <openssl/bn.h> |
5fe736e5 | 65 | #include "internal/asn1_int.h" |
3aeb9348 | 66 | #include "internal/evp_int.h" |
bd59f2b9 | 67 | #ifndef OPENSSL_NO_CMS |
0f113f3e | 68 | # include <openssl/cms.h> |
bd59f2b9 | 69 | #endif |
adbc603d | 70 | |
0f113f3e MC |
71 | /* |
72 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
73 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
74 | */ |
75 | ||
0f113f3e MC |
76 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
77 | long length) | |
78 | { | |
79 | if (pkey->ameth == &dhx_asn1_meth) | |
80 | return d2i_DHxparams(NULL, pp, length); | |
81 | return d2i_DHparams(NULL, pp, length); | |
82 | } | |
afb14cda DSH |
83 | |
84 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
85 | { |
86 | if (pkey->ameth == &dhx_asn1_meth) | |
87 | return i2d_DHxparams(a, pp); | |
88 | return i2d_DHparams(a, pp); | |
89 | } | |
afb14cda | 90 | |
adbc603d | 91 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
92 | { |
93 | DH_free(pkey->pkey.dh); | |
94 | } | |
adbc603d | 95 | |
ceb46789 | 96 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
97 | { |
98 | const unsigned char *p, *pm; | |
99 | int pklen, pmlen; | |
100 | int ptype; | |
101 | void *pval; | |
102 | ASN1_STRING *pstr; | |
103 | X509_ALGOR *palg; | |
104 | ASN1_INTEGER *public_key = NULL; | |
105 | ||
106 | DH *dh = NULL; | |
107 | ||
108 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
109 | return 0; | |
110 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
111 | ||
112 | if (ptype != V_ASN1_SEQUENCE) { | |
113 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
114 | goto err; | |
115 | } | |
116 | ||
117 | pstr = pval; | |
118 | pm = pstr->data; | |
119 | pmlen = pstr->length; | |
120 | ||
75ebbd9a | 121 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
122 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
123 | goto err; | |
124 | } | |
125 | ||
75ebbd9a | 126 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
127 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
128 | goto err; | |
129 | } | |
130 | ||
131 | /* We have parameters now set public key */ | |
75ebbd9a | 132 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
133 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
134 | goto err; | |
135 | } | |
136 | ||
137 | ASN1_INTEGER_free(public_key); | |
138 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
139 | return 1; | |
140 | ||
141 | err: | |
2ace7450 | 142 | ASN1_INTEGER_free(public_key); |
d6407083 | 143 | DH_free(dh); |
0f113f3e | 144 | return 0; |
4c97a04e | 145 | |
0f113f3e | 146 | } |
4c97a04e | 147 | |
0f113f3e MC |
148 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
149 | { | |
150 | DH *dh; | |
0f113f3e MC |
151 | int ptype; |
152 | unsigned char *penc = NULL; | |
153 | int penclen; | |
154 | ASN1_STRING *str; | |
155 | ASN1_INTEGER *pub_key = NULL; | |
156 | ||
157 | dh = pkey->pkey.dh; | |
158 | ||
159 | str = ASN1_STRING_new(); | |
90945fa3 | 160 | if (str == NULL) { |
6aa8dab2 MC |
161 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
162 | goto err; | |
163 | } | |
0f113f3e MC |
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 | } | |
0f113f3e MC |
169 | ptype = V_ASN1_SEQUENCE; |
170 | ||
171 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
172 | if (!pub_key) | |
173 | goto err; | |
174 | ||
175 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
176 | ||
177 | ASN1_INTEGER_free(pub_key); | |
178 | ||
179 | if (penclen <= 0) { | |
180 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
181 | goto err; | |
182 | } | |
183 | ||
184 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 185 | ptype, str, penc, penclen)) |
0f113f3e MC |
186 | return 1; |
187 | ||
188 | err: | |
b548a1f1 | 189 | OPENSSL_free(penc); |
0dfb9398 | 190 | ASN1_STRING_free(str); |
0f113f3e MC |
191 | |
192 | return 0; | |
193 | } | |
4c97a04e | 194 | |
0f113f3e MC |
195 | /* |
196 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
197 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 198 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 199 | */ |
4c97a04e | 200 | |
0f113f3e MC |
201 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
202 | { | |
203 | const unsigned char *p, *pm; | |
204 | int pklen, pmlen; | |
205 | int ptype; | |
206 | void *pval; | |
207 | ASN1_STRING *pstr; | |
208 | X509_ALGOR *palg; | |
209 | ASN1_INTEGER *privkey = NULL; | |
210 | ||
211 | DH *dh = NULL; | |
212 | ||
213 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
214 | return 0; | |
215 | ||
216 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
217 | ||
218 | if (ptype != V_ASN1_SEQUENCE) | |
219 | goto decerr; | |
75ebbd9a | 220 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
221 | goto decerr; |
222 | ||
223 | pstr = pval; | |
224 | pm = pstr->data; | |
225 | pmlen = pstr->length; | |
75ebbd9a | 226 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 227 | goto decerr; |
75ebbd9a | 228 | |
0f113f3e | 229 | /* We have parameters now set private key */ |
74924dcb RS |
230 | if ((dh->priv_key = BN_secure_new()) == NULL |
231 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
232 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
233 | goto dherr; | |
234 | } | |
235 | /* Calculate public key */ | |
236 | if (!DH_generate_key(dh)) | |
237 | goto dherr; | |
238 | ||
239 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
240 | ||
a8ae0891 | 241 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
242 | |
243 | return 1; | |
244 | ||
245 | decerr: | |
246 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
247 | dherr: | |
248 | DH_free(dh); | |
a8ae0891 | 249 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
250 | return 0; |
251 | } | |
4c97a04e DSH |
252 | |
253 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
254 | { | |
0f113f3e MC |
255 | ASN1_STRING *params = NULL; |
256 | ASN1_INTEGER *prkey = NULL; | |
257 | unsigned char *dp = NULL; | |
258 | int dplen; | |
259 | ||
260 | params = ASN1_STRING_new(); | |
261 | ||
90945fa3 | 262 | if (params == NULL) { |
0f113f3e MC |
263 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
264 | goto err; | |
265 | } | |
266 | ||
267 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
268 | if (params->length <= 0) { | |
269 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
270 | goto err; | |
271 | } | |
272 | params->type = V_ASN1_SEQUENCE; | |
273 | ||
274 | /* Get private key into integer */ | |
275 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
276 | ||
277 | if (!prkey) { | |
278 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
279 | goto err; | |
280 | } | |
281 | ||
282 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
283 | ||
a8ae0891 | 284 | ASN1_STRING_clear_free(prkey); |
1549a265 | 285 | prkey = NULL; |
0f113f3e MC |
286 | |
287 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
288 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
289 | goto err; | |
290 | ||
291 | return 1; | |
292 | ||
293 | err: | |
b548a1f1 | 294 | OPENSSL_free(dp); |
0dfb9398 | 295 | ASN1_STRING_free(params); |
2ace7450 | 296 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 297 | return 0; |
4c97a04e DSH |
298 | } |
299 | ||
3e4585c8 | 300 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
301 | const unsigned char **pder, int derlen) |
302 | { | |
303 | DH *dh; | |
75ebbd9a RS |
304 | |
305 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
306 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
307 | return 0; | |
308 | } | |
309 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
310 | return 1; | |
311 | } | |
3e4585c8 DSH |
312 | |
313 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
314 | { |
315 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
316 | } | |
3e4585c8 | 317 | |
a773b52a | 318 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 319 | { |
66696478 | 320 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 321 | const char *ktype = NULL; |
0f113f3e MC |
322 | BIGNUM *priv_key, *pub_key; |
323 | ||
324 | if (ptype == 2) | |
325 | priv_key = x->priv_key; | |
326 | else | |
327 | priv_key = NULL; | |
328 | ||
329 | if (ptype > 0) | |
330 | pub_key = x->pub_key; | |
331 | else | |
332 | pub_key = NULL; | |
333 | ||
a773b52a | 334 | if (priv_key == NULL && pub_key == NULL) { |
0f113f3e MC |
335 | reason = ERR_R_PASSED_NULL_PARAMETER; |
336 | goto err; | |
337 | } | |
338 | ||
0f113f3e MC |
339 | if (ptype == 2) |
340 | ktype = "DH Private-Key"; | |
341 | else if (ptype == 1) | |
342 | ktype = "DH Public-Key"; | |
343 | else | |
344 | ktype = "DH Parameters"; | |
345 | ||
0f113f3e MC |
346 | BIO_indent(bp, indent, 128); |
347 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
348 | goto err; | |
349 | indent += 4; | |
350 | ||
a773b52a | 351 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 352 | goto err; |
a773b52a | 353 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
354 | goto err; |
355 | ||
a773b52a | 356 | if (!ASN1_bn_print(bp, "prime:", x->p, NULL, indent)) |
0f113f3e | 357 | goto err; |
a773b52a | 358 | if (!ASN1_bn_print(bp, "generator:", x->g, NULL, indent)) |
0f113f3e | 359 | goto err; |
a773b52a | 360 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, NULL, indent)) |
0f113f3e | 361 | goto err; |
a773b52a | 362 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, NULL, indent)) |
0f113f3e MC |
363 | goto err; |
364 | if (x->seed) { | |
365 | int i; | |
366 | BIO_indent(bp, indent, 128); | |
367 | BIO_puts(bp, "seed:"); | |
368 | for (i = 0; i < x->seedlen; i++) { | |
369 | if ((i % 15) == 0) { | |
370 | if (BIO_puts(bp, "\n") <= 0 | |
371 | || !BIO_indent(bp, indent + 4, 128)) | |
372 | goto err; | |
373 | } | |
374 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
375 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
376 | goto err; | |
377 | } | |
378 | if (BIO_write(bp, "\n", 1) <= 0) | |
379 | return (0); | |
380 | } | |
a773b52a | 381 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, NULL, indent)) |
0f113f3e MC |
382 | goto err; |
383 | if (x->length != 0) { | |
384 | BIO_indent(bp, indent, 128); | |
385 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
386 | (int)x->length) <= 0) | |
387 | goto err; | |
388 | } | |
389 | ||
66696478 RS |
390 | return 1; |
391 | ||
0f113f3e | 392 | err: |
66696478 | 393 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 394 | return 0; |
0f113f3e | 395 | } |
3e4585c8 | 396 | |
ceb46789 | 397 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
398 | { |
399 | return (DH_size(pkey->pkey.dh)); | |
400 | } | |
ceb46789 DSH |
401 | |
402 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
403 | { |
404 | return BN_num_bits(pkey->pkey.dh->p); | |
405 | } | |
ceb46789 | 406 | |
2514fa79 | 407 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
408 | { |
409 | return DH_security_bits(pkey->pkey.dh); | |
410 | } | |
2514fa79 | 411 | |
ffb1ac67 | 412 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
413 | { |
414 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
415 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
416 | return 0; | |
417 | else if (a->ameth == &dhx_asn1_meth) { | |
418 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
419 | return 0; | |
420 | } | |
421 | return 1; | |
422 | } | |
ffb1ac67 | 423 | |
d3cc91ee | 424 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
425 | { |
426 | BIGNUM *a; | |
427 | if (src) { | |
428 | a = BN_dup(src); | |
429 | if (!a) | |
430 | return 0; | |
431 | } else | |
432 | a = NULL; | |
23a1d5e9 | 433 | BN_free(*dst); |
0f113f3e MC |
434 | *dst = a; |
435 | return 1; | |
436 | } | |
ceb46789 | 437 | |
d3cc91ee | 438 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
439 | { |
440 | if (is_x942 == -1) | |
441 | is_x942 = ! !from->q; | |
442 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
443 | return 0; | |
444 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
445 | return 0; | |
446 | if (is_x942) { | |
447 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
448 | return 0; | |
449 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
450 | return 0; | |
b548a1f1 RS |
451 | OPENSSL_free(to->seed); |
452 | to->seed = NULL; | |
453 | to->seedlen = 0; | |
0f113f3e | 454 | if (from->seed) { |
7644a9ae | 455 | to->seed = OPENSSL_memdup(from->seed, from->seedlen); |
0f113f3e MC |
456 | if (!to->seed) |
457 | return 0; | |
458 | to->seedlen = from->seedlen; | |
459 | } | |
460 | } else | |
461 | to->length = from->length; | |
462 | return 1; | |
463 | } | |
d3cc91ee DSH |
464 | |
465 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
466 | { |
467 | DH *ret; | |
468 | ret = DH_new(); | |
90945fa3 | 469 | if (ret == NULL) |
0f113f3e MC |
470 | return NULL; |
471 | if (!int_dh_param_copy(ret, dh, -1)) { | |
472 | DH_free(ret); | |
473 | return NULL; | |
474 | } | |
475 | return ret; | |
476 | } | |
d3cc91ee DSH |
477 | |
478 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 479 | { |
2986ecdc DSH |
480 | if (to->pkey.dh == NULL) { |
481 | to->pkey.dh = DH_new(); | |
482 | if (to->pkey.dh == NULL) | |
483 | return 0; | |
484 | } | |
0f113f3e MC |
485 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
486 | from->ameth == &dhx_asn1_meth); | |
487 | } | |
d3cc91ee | 488 | |
ffb1ac67 | 489 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
490 | { |
491 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
492 | return 1; | |
493 | return 0; | |
494 | } | |
ceb46789 DSH |
495 | |
496 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
497 | { |
498 | if (dh_cmp_parameters(a, b) == 0) | |
499 | return 0; | |
500 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
501 | return 0; | |
502 | else | |
503 | return 1; | |
504 | } | |
ceb46789 | 505 | |
3e4585c8 | 506 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
507 | ASN1_PCTX *ctx) |
508 | { | |
a773b52a | 509 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 510 | } |
ceb46789 DSH |
511 | |
512 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
513 | ASN1_PCTX *ctx) |
514 | { | |
a773b52a | 515 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 516 | } |
ceb46789 DSH |
517 | |
518 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
519 | ASN1_PCTX *ctx) |
520 | { | |
a773b52a | 521 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 522 | } |
3e4585c8 DSH |
523 | |
524 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 525 | { |
a773b52a | 526 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 527 | } |
3e4585c8 | 528 | |
bd59f2b9 DSH |
529 | #ifndef OPENSSL_NO_CMS |
530 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
531 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
532 | #endif | |
533 | ||
534 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
535 | { |
536 | switch (op) { | |
bd59f2b9 DSH |
537 | #ifndef OPENSSL_NO_CMS |
538 | ||
0f113f3e MC |
539 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
540 | if (arg1 == 1) | |
541 | return dh_cms_decrypt(arg2); | |
542 | else if (arg1 == 0) | |
543 | return dh_cms_encrypt(arg2); | |
544 | return -2; | |
bd59f2b9 | 545 | |
0f113f3e MC |
546 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
547 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
548 | return 1; | |
bd59f2b9 | 549 | #endif |
0f113f3e MC |
550 | default: |
551 | return -2; | |
552 | } | |
553 | ||
554 | } | |
555 | ||
556 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
557 | EVP_PKEY_DH, | |
558 | EVP_PKEY_DH, | |
559 | 0, | |
560 | ||
561 | "DH", | |
562 | "OpenSSL PKCS#3 DH method", | |
563 | ||
564 | dh_pub_decode, | |
565 | dh_pub_encode, | |
566 | dh_pub_cmp, | |
567 | dh_public_print, | |
568 | ||
569 | dh_priv_decode, | |
570 | dh_priv_encode, | |
571 | dh_private_print, | |
572 | ||
573 | int_dh_size, | |
574 | dh_bits, | |
575 | dh_security_bits, | |
576 | ||
577 | dh_param_decode, | |
578 | dh_param_encode, | |
579 | dh_missing_parameters, | |
580 | dh_copy_parameters, | |
581 | dh_cmp_parameters, | |
582 | dh_param_print, | |
583 | 0, | |
584 | ||
585 | int_dh_free, | |
586 | 0 | |
587 | }; | |
588 | ||
589 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
590 | EVP_PKEY_DHX, | |
591 | EVP_PKEY_DHX, | |
592 | 0, | |
593 | ||
594 | "X9.42 DH", | |
595 | "OpenSSL X9.42 DH method", | |
596 | ||
597 | dh_pub_decode, | |
598 | dh_pub_encode, | |
599 | dh_pub_cmp, | |
600 | dh_public_print, | |
601 | ||
602 | dh_priv_decode, | |
603 | dh_priv_encode, | |
604 | dh_private_print, | |
605 | ||
606 | int_dh_size, | |
607 | dh_bits, | |
608 | dh_security_bits, | |
609 | ||
610 | dh_param_decode, | |
611 | dh_param_encode, | |
612 | dh_missing_parameters, | |
613 | dh_copy_parameters, | |
614 | dh_cmp_parameters, | |
615 | dh_param_print, | |
616 | 0, | |
617 | ||
618 | int_dh_free, | |
619 | dh_pkey_ctrl | |
620 | }; | |
621 | ||
bd59f2b9 DSH |
622 | #ifndef OPENSSL_NO_CMS |
623 | ||
624 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
625 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
626 | { | |
627 | ASN1_OBJECT *aoid; | |
628 | int atype; | |
629 | void *aval; | |
630 | ASN1_INTEGER *public_key = NULL; | |
631 | int rv = 0; | |
632 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
633 | DH *dhpeer = NULL; | |
634 | const unsigned char *p; | |
635 | int plen; | |
636 | ||
637 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
638 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
639 | goto err; | |
640 | /* Only absent parameters allowed in RFC XXXX */ | |
641 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
642 | goto err; | |
643 | ||
644 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
645 | if (!pk) | |
646 | goto err; | |
647 | if (pk->type != EVP_PKEY_DHX) | |
648 | goto err; | |
649 | /* Get parameters from parent key */ | |
650 | dhpeer = DHparams_dup(pk->pkey.dh); | |
651 | /* We have parameters now set public key */ | |
652 | plen = ASN1_STRING_length(pubkey); | |
653 | p = ASN1_STRING_data(pubkey); | |
654 | if (!p || !plen) | |
655 | goto err; | |
656 | ||
75ebbd9a | 657 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
658 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
659 | goto err; | |
660 | } | |
661 | ||
662 | /* We have parameters now set public key */ | |
75ebbd9a | 663 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
664 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
665 | goto err; | |
666 | } | |
667 | ||
668 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 669 | if (pkpeer == NULL) |
0f113f3e MC |
670 | goto err; |
671 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
672 | dhpeer = NULL; | |
673 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
674 | rv = 1; | |
675 | err: | |
2ace7450 | 676 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 677 | EVP_PKEY_free(pkpeer); |
d6407083 | 678 | DH_free(dhpeer); |
0f113f3e MC |
679 | return rv; |
680 | } | |
bd59f2b9 DSH |
681 | |
682 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
683 | { |
684 | int rv = 0; | |
685 | ||
686 | X509_ALGOR *alg, *kekalg = NULL; | |
687 | ASN1_OCTET_STRING *ukm; | |
688 | const unsigned char *p; | |
689 | unsigned char *dukm = NULL; | |
690 | size_t dukmlen = 0; | |
691 | int keylen, plen; | |
692 | const EVP_CIPHER *kekcipher; | |
693 | EVP_CIPHER_CTX *kekctx; | |
694 | ||
695 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
696 | goto err; | |
697 | ||
698 | /* | |
699 | * For DH we only have one OID permissible. If ever any more get defined | |
700 | * we will need something cleverer. | |
701 | */ | |
702 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
703 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
704 | goto err; | |
705 | } | |
706 | ||
707 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
708 | goto err; | |
709 | ||
710 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
711 | goto err; | |
712 | ||
713 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
714 | goto err; | |
715 | ||
716 | p = alg->parameter->value.sequence->data; | |
717 | plen = alg->parameter->value.sequence->length; | |
718 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
719 | if (!kekalg) | |
720 | goto err; | |
721 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
722 | if (!kekctx) | |
723 | goto err; | |
724 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
725 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
726 | goto err; | |
727 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
728 | goto err; | |
729 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
730 | goto err; | |
731 | ||
732 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
733 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
734 | goto err; | |
735 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
736 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
737 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
738 | <= 0) | |
739 | goto err; | |
740 | ||
741 | if (ukm) { | |
742 | dukmlen = ASN1_STRING_length(ukm); | |
7644a9ae | 743 | dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen); |
0f113f3e MC |
744 | if (!dukm) |
745 | goto err; | |
746 | } | |
747 | ||
748 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
749 | goto err; | |
750 | dukm = NULL; | |
751 | ||
752 | rv = 1; | |
753 | err: | |
222561fe RS |
754 | X509_ALGOR_free(kekalg); |
755 | OPENSSL_free(dukm); | |
0f113f3e MC |
756 | return rv; |
757 | } | |
bd59f2b9 DSH |
758 | |
759 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
760 | { |
761 | EVP_PKEY_CTX *pctx; | |
762 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
763 | if (!pctx) | |
764 | return 0; | |
765 | /* See if we need to set peer key */ | |
766 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
767 | X509_ALGOR *alg; | |
768 | ASN1_BIT_STRING *pubkey; | |
769 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
770 | NULL, NULL, NULL)) | |
771 | return 0; | |
772 | if (!alg || !pubkey) | |
773 | return 0; | |
774 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
775 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
776 | return 0; | |
777 | } | |
778 | } | |
779 | /* Set DH derivation parameters and initialise unwrap context */ | |
780 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
781 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
782 | return 0; | |
783 | } | |
784 | return 1; | |
785 | } | |
bd59f2b9 DSH |
786 | |
787 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
788 | { |
789 | EVP_PKEY_CTX *pctx; | |
790 | EVP_PKEY *pkey; | |
791 | EVP_CIPHER_CTX *ctx; | |
792 | int keylen; | |
793 | X509_ALGOR *talg, *wrap_alg = NULL; | |
794 | ASN1_OBJECT *aoid; | |
795 | ASN1_BIT_STRING *pubkey; | |
796 | ASN1_STRING *wrap_str; | |
797 | ASN1_OCTET_STRING *ukm; | |
798 | unsigned char *penc = NULL, *dukm = NULL; | |
799 | int penclen; | |
800 | size_t dukmlen = 0; | |
801 | int rv = 0; | |
802 | int kdf_type, wrap_nid; | |
803 | const EVP_MD *kdf_md; | |
804 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
805 | if (!pctx) | |
806 | return 0; | |
807 | /* Get ephemeral key */ | |
808 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
809 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
810 | NULL, NULL, NULL)) | |
811 | goto err; | |
812 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
813 | /* Is everything uninitialised? */ | |
814 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 815 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
0f113f3e MC |
816 | if (!pubk) |
817 | goto err; | |
818 | /* Set the key */ | |
819 | ||
820 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
821 | ASN1_INTEGER_free(pubk); | |
822 | if (penclen <= 0) | |
823 | goto err; | |
824 | ASN1_STRING_set0(pubkey, penc, penclen); | |
825 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
826 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
827 | ||
828 | penc = NULL; | |
829 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
830 | V_ASN1_UNDEF, NULL); | |
831 | } | |
832 | ||
0d4fb843 | 833 | /* See if custom parameters set */ |
0f113f3e MC |
834 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
835 | if (kdf_type <= 0) | |
836 | goto err; | |
837 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
838 | goto err; | |
839 | ||
840 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
841 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
842 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
843 | goto err; | |
844 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
845 | /* Unknown KDF */ | |
846 | goto err; | |
847 | if (kdf_md == NULL) { | |
848 | /* Only SHA1 supported */ | |
849 | kdf_md = EVP_sha1(); | |
850 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
851 | goto err; | |
852 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
853 | /* Unsupported digest */ | |
854 | goto err; | |
855 | ||
856 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
857 | goto err; | |
858 | ||
859 | /* Get wrap NID */ | |
860 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
861 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
862 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
863 | goto err; | |
864 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
865 | ||
866 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
867 | ||
868 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 869 | if (wrap_alg == NULL) |
0f113f3e MC |
870 | goto err; |
871 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
872 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 873 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
874 | goto err; |
875 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
876 | goto err; | |
877 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
878 | ASN1_TYPE_free(wrap_alg->parameter); | |
879 | wrap_alg->parameter = NULL; | |
880 | } | |
881 | ||
882 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
883 | goto err; | |
884 | ||
885 | if (ukm) { | |
886 | dukmlen = ASN1_STRING_length(ukm); | |
7644a9ae | 887 | dukm = OPENSSL_memdup(ASN1_STRING_data(ukm), dukmlen); |
0f113f3e MC |
888 | if (!dukm) |
889 | goto err; | |
890 | } | |
891 | ||
892 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
893 | goto err; | |
894 | dukm = NULL; | |
895 | ||
896 | /* | |
897 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
898 | * of another AlgorithmIdentifier. | |
899 | */ | |
900 | penc = NULL; | |
901 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
902 | if (!penc || !penclen) | |
903 | goto err; | |
904 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 905 | if (wrap_str == NULL) |
0f113f3e MC |
906 | goto err; |
907 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
908 | penc = NULL; | |
909 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
910 | V_ASN1_SEQUENCE, wrap_str); | |
911 | ||
912 | rv = 1; | |
913 | ||
914 | err: | |
222561fe RS |
915 | OPENSSL_free(penc); |
916 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
917 | return rv; |
918 | } | |
bd59f2b9 DSH |
919 | |
920 | #endif |