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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" |
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 | ||
75ebbd9a | 122 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
123 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
124 | goto err; | |
125 | } | |
126 | ||
75ebbd9a | 127 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
128 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
129 | goto err; | |
130 | } | |
131 | ||
132 | /* We have parameters now set public key */ | |
75ebbd9a | 133 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
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: | |
2ace7450 | 143 | ASN1_INTEGER_free(public_key); |
d6407083 | 144 | DH_free(dh); |
0f113f3e | 145 | return 0; |
4c97a04e | 146 | |
0f113f3e | 147 | } |
4c97a04e | 148 | |
0f113f3e MC |
149 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
150 | { | |
151 | DH *dh; | |
0f113f3e MC |
152 | int ptype; |
153 | unsigned char *penc = NULL; | |
154 | int penclen; | |
155 | ASN1_STRING *str; | |
156 | ASN1_INTEGER *pub_key = NULL; | |
157 | ||
158 | dh = pkey->pkey.dh; | |
159 | ||
160 | str = ASN1_STRING_new(); | |
61986d32 | 161 | if (!str) { |
6aa8dab2 MC |
162 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
163 | goto err; | |
164 | } | |
0f113f3e MC |
165 | str->length = i2d_dhp(pkey, dh, &str->data); |
166 | if (str->length <= 0) { | |
167 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
168 | goto err; | |
169 | } | |
0f113f3e MC |
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), | |
6aa8dab2 | 186 | ptype, str, penc, penclen)) |
0f113f3e MC |
187 | return 1; |
188 | ||
189 | err: | |
b548a1f1 | 190 | OPENSSL_free(penc); |
0dfb9398 | 191 | ASN1_STRING_free(str); |
0f113f3e MC |
192 | |
193 | return 0; | |
194 | } | |
4c97a04e | 195 | |
0f113f3e MC |
196 | /* |
197 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
198 | * the AlgorithmIdentifier contains the parameters, the private key is | |
199 | * explcitly included and the pubkey must be recalculated. | |
200 | */ | |
4c97a04e | 201 | |
0f113f3e MC |
202 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
203 | { | |
204 | const unsigned char *p, *pm; | |
205 | int pklen, pmlen; | |
206 | int ptype; | |
207 | void *pval; | |
208 | ASN1_STRING *pstr; | |
209 | X509_ALGOR *palg; | |
210 | ASN1_INTEGER *privkey = NULL; | |
211 | ||
212 | DH *dh = NULL; | |
213 | ||
214 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
215 | return 0; | |
216 | ||
217 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
218 | ||
219 | if (ptype != V_ASN1_SEQUENCE) | |
220 | goto decerr; | |
75ebbd9a | 221 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
222 | goto decerr; |
223 | ||
224 | pstr = pval; | |
225 | pm = pstr->data; | |
226 | pmlen = pstr->length; | |
75ebbd9a | 227 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 228 | goto decerr; |
75ebbd9a | 229 | |
0f113f3e | 230 | /* We have parameters now set private key */ |
74924dcb RS |
231 | if ((dh->priv_key = BN_secure_new()) == NULL |
232 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
233 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
234 | goto dherr; | |
235 | } | |
236 | /* Calculate public key */ | |
237 | if (!DH_generate_key(dh)) | |
238 | goto dherr; | |
239 | ||
240 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
241 | ||
a8ae0891 | 242 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
243 | |
244 | return 1; | |
245 | ||
246 | decerr: | |
247 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
248 | dherr: | |
249 | DH_free(dh); | |
a8ae0891 | 250 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
251 | return 0; |
252 | } | |
4c97a04e DSH |
253 | |
254 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
255 | { | |
0f113f3e MC |
256 | ASN1_STRING *params = NULL; |
257 | ASN1_INTEGER *prkey = NULL; | |
258 | unsigned char *dp = NULL; | |
259 | int dplen; | |
260 | ||
261 | params = ASN1_STRING_new(); | |
262 | ||
263 | if (!params) { | |
264 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
265 | goto err; | |
266 | } | |
267 | ||
268 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
269 | if (params->length <= 0) { | |
270 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
271 | goto err; | |
272 | } | |
273 | params->type = V_ASN1_SEQUENCE; | |
274 | ||
275 | /* Get private key into integer */ | |
276 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
277 | ||
278 | if (!prkey) { | |
279 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
280 | goto err; | |
281 | } | |
282 | ||
283 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
284 | ||
a8ae0891 | 285 | ASN1_STRING_clear_free(prkey); |
1549a265 | 286 | prkey = NULL; |
0f113f3e MC |
287 | |
288 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
289 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
290 | goto err; | |
291 | ||
292 | return 1; | |
293 | ||
294 | err: | |
b548a1f1 | 295 | OPENSSL_free(dp); |
0dfb9398 | 296 | ASN1_STRING_free(params); |
2ace7450 | 297 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 298 | return 0; |
4c97a04e DSH |
299 | } |
300 | ||
ceb46789 | 301 | static void update_buflen(const BIGNUM *b, size_t *pbuflen) |
0f113f3e MC |
302 | { |
303 | size_t i; | |
304 | if (!b) | |
305 | return; | |
306 | if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
307 | *pbuflen = i; | |
308 | } | |
ceb46789 | 309 | |
3e4585c8 | 310 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
311 | const unsigned char **pder, int derlen) |
312 | { | |
313 | DH *dh; | |
75ebbd9a RS |
314 | |
315 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
316 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
317 | return 0; | |
318 | } | |
319 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
320 | return 1; | |
321 | } | |
3e4585c8 DSH |
322 | |
323 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
324 | { |
325 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
326 | } | |
3e4585c8 | 327 | |
ceb46789 | 328 | static int do_dh_print(BIO *bp, const DH *x, int indent, |
0f113f3e MC |
329 | ASN1_PCTX *ctx, int ptype) |
330 | { | |
331 | unsigned char *m = NULL; | |
66696478 | 332 | int reason = ERR_R_BUF_LIB; |
0f113f3e MC |
333 | size_t buf_len = 0; |
334 | ||
335 | const char *ktype = NULL; | |
336 | ||
337 | BIGNUM *priv_key, *pub_key; | |
338 | ||
339 | if (ptype == 2) | |
340 | priv_key = x->priv_key; | |
341 | else | |
342 | priv_key = NULL; | |
343 | ||
344 | if (ptype > 0) | |
345 | pub_key = x->pub_key; | |
346 | else | |
347 | pub_key = NULL; | |
348 | ||
349 | update_buflen(x->p, &buf_len); | |
350 | ||
351 | if (buf_len == 0) { | |
352 | reason = ERR_R_PASSED_NULL_PARAMETER; | |
353 | goto err; | |
354 | } | |
355 | ||
356 | update_buflen(x->g, &buf_len); | |
357 | update_buflen(x->q, &buf_len); | |
358 | update_buflen(x->j, &buf_len); | |
359 | update_buflen(x->counter, &buf_len); | |
360 | update_buflen(pub_key, &buf_len); | |
361 | update_buflen(priv_key, &buf_len); | |
362 | ||
363 | if (ptype == 2) | |
364 | ktype = "DH Private-Key"; | |
365 | else if (ptype == 1) | |
366 | ktype = "DH Public-Key"; | |
367 | else | |
368 | ktype = "DH Parameters"; | |
369 | ||
370 | m = OPENSSL_malloc(buf_len + 10); | |
371 | if (m == NULL) { | |
372 | reason = ERR_R_MALLOC_FAILURE; | |
373 | goto err; | |
374 | } | |
375 | ||
376 | BIO_indent(bp, indent, 128); | |
377 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
378 | goto err; | |
379 | indent += 4; | |
380 | ||
381 | if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent)) | |
382 | goto err; | |
383 | if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent)) | |
384 | goto err; | |
385 | ||
386 | if (!ASN1_bn_print(bp, "prime:", x->p, m, indent)) | |
387 | goto err; | |
388 | if (!ASN1_bn_print(bp, "generator:", x->g, m, indent)) | |
389 | goto err; | |
390 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent)) | |
391 | goto err; | |
392 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent)) | |
393 | goto err; | |
394 | if (x->seed) { | |
395 | int i; | |
396 | BIO_indent(bp, indent, 128); | |
397 | BIO_puts(bp, "seed:"); | |
398 | for (i = 0; i < x->seedlen; i++) { | |
399 | if ((i % 15) == 0) { | |
400 | if (BIO_puts(bp, "\n") <= 0 | |
401 | || !BIO_indent(bp, indent + 4, 128)) | |
402 | goto err; | |
403 | } | |
404 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
405 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
406 | goto err; | |
407 | } | |
408 | if (BIO_write(bp, "\n", 1) <= 0) | |
409 | return (0); | |
410 | } | |
411 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent)) | |
412 | goto err; | |
413 | if (x->length != 0) { | |
414 | BIO_indent(bp, indent, 128); | |
415 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
416 | (int)x->length) <= 0) | |
417 | goto err; | |
418 | } | |
419 | ||
66696478 RS |
420 | OPENSSL_free(m); |
421 | return 1; | |
422 | ||
0f113f3e | 423 | err: |
66696478 | 424 | DHerr(DH_F_DO_DH_PRINT, reason); |
b548a1f1 | 425 | OPENSSL_free(m); |
66696478 | 426 | return 0; |
0f113f3e | 427 | } |
3e4585c8 | 428 | |
ceb46789 | 429 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
430 | { |
431 | return (DH_size(pkey->pkey.dh)); | |
432 | } | |
ceb46789 DSH |
433 | |
434 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
435 | { |
436 | return BN_num_bits(pkey->pkey.dh->p); | |
437 | } | |
ceb46789 | 438 | |
2514fa79 | 439 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
440 | { |
441 | return DH_security_bits(pkey->pkey.dh); | |
442 | } | |
2514fa79 | 443 | |
ffb1ac67 | 444 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
445 | { |
446 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
447 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
448 | return 0; | |
449 | else if (a->ameth == &dhx_asn1_meth) { | |
450 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
451 | return 0; | |
452 | } | |
453 | return 1; | |
454 | } | |
ffb1ac67 | 455 | |
d3cc91ee | 456 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
457 | { |
458 | BIGNUM *a; | |
459 | if (src) { | |
460 | a = BN_dup(src); | |
461 | if (!a) | |
462 | return 0; | |
463 | } else | |
464 | a = NULL; | |
23a1d5e9 | 465 | BN_free(*dst); |
0f113f3e MC |
466 | *dst = a; |
467 | return 1; | |
468 | } | |
ceb46789 | 469 | |
d3cc91ee | 470 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
471 | { |
472 | if (is_x942 == -1) | |
473 | is_x942 = ! !from->q; | |
474 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
475 | return 0; | |
476 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
477 | return 0; | |
478 | if (is_x942) { | |
479 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
480 | return 0; | |
481 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
482 | return 0; | |
b548a1f1 RS |
483 | OPENSSL_free(to->seed); |
484 | to->seed = NULL; | |
485 | to->seedlen = 0; | |
0f113f3e MC |
486 | if (from->seed) { |
487 | to->seed = BUF_memdup(from->seed, from->seedlen); | |
488 | if (!to->seed) | |
489 | return 0; | |
490 | to->seedlen = from->seedlen; | |
491 | } | |
492 | } else | |
493 | to->length = from->length; | |
494 | return 1; | |
495 | } | |
d3cc91ee DSH |
496 | |
497 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
498 | { |
499 | DH *ret; | |
500 | ret = DH_new(); | |
501 | if (!ret) | |
502 | return NULL; | |
503 | if (!int_dh_param_copy(ret, dh, -1)) { | |
504 | DH_free(ret); | |
505 | return NULL; | |
506 | } | |
507 | return ret; | |
508 | } | |
d3cc91ee DSH |
509 | |
510 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e MC |
511 | { |
512 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, | |
513 | from->ameth == &dhx_asn1_meth); | |
514 | } | |
d3cc91ee | 515 | |
ffb1ac67 | 516 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
517 | { |
518 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
519 | return 1; | |
520 | return 0; | |
521 | } | |
ceb46789 DSH |
522 | |
523 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
524 | { |
525 | if (dh_cmp_parameters(a, b) == 0) | |
526 | return 0; | |
527 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
528 | return 0; | |
529 | else | |
530 | return 1; | |
531 | } | |
ceb46789 | 532 | |
3e4585c8 | 533 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
534 | ASN1_PCTX *ctx) |
535 | { | |
536 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0); | |
537 | } | |
ceb46789 DSH |
538 | |
539 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
540 | ASN1_PCTX *ctx) |
541 | { | |
542 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1); | |
543 | } | |
ceb46789 DSH |
544 | |
545 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
546 | ASN1_PCTX *ctx) |
547 | { | |
548 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2); | |
549 | } | |
3e4585c8 DSH |
550 | |
551 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e MC |
552 | { |
553 | return do_dh_print(bp, x, 4, NULL, 0); | |
554 | } | |
3e4585c8 | 555 | |
bd59f2b9 DSH |
556 | #ifndef OPENSSL_NO_CMS |
557 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
558 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
559 | #endif | |
560 | ||
561 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
562 | { |
563 | switch (op) { | |
bd59f2b9 DSH |
564 | #ifndef OPENSSL_NO_CMS |
565 | ||
0f113f3e MC |
566 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
567 | if (arg1 == 1) | |
568 | return dh_cms_decrypt(arg2); | |
569 | else if (arg1 == 0) | |
570 | return dh_cms_encrypt(arg2); | |
571 | return -2; | |
bd59f2b9 | 572 | |
0f113f3e MC |
573 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
574 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
575 | return 1; | |
bd59f2b9 | 576 | #endif |
0f113f3e MC |
577 | default: |
578 | return -2; | |
579 | } | |
580 | ||
581 | } | |
582 | ||
583 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
584 | EVP_PKEY_DH, | |
585 | EVP_PKEY_DH, | |
586 | 0, | |
587 | ||
588 | "DH", | |
589 | "OpenSSL PKCS#3 DH method", | |
590 | ||
591 | dh_pub_decode, | |
592 | dh_pub_encode, | |
593 | dh_pub_cmp, | |
594 | dh_public_print, | |
595 | ||
596 | dh_priv_decode, | |
597 | dh_priv_encode, | |
598 | dh_private_print, | |
599 | ||
600 | int_dh_size, | |
601 | dh_bits, | |
602 | dh_security_bits, | |
603 | ||
604 | dh_param_decode, | |
605 | dh_param_encode, | |
606 | dh_missing_parameters, | |
607 | dh_copy_parameters, | |
608 | dh_cmp_parameters, | |
609 | dh_param_print, | |
610 | 0, | |
611 | ||
612 | int_dh_free, | |
613 | 0 | |
614 | }; | |
615 | ||
616 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
617 | EVP_PKEY_DHX, | |
618 | EVP_PKEY_DHX, | |
619 | 0, | |
620 | ||
621 | "X9.42 DH", | |
622 | "OpenSSL X9.42 DH method", | |
623 | ||
624 | dh_pub_decode, | |
625 | dh_pub_encode, | |
626 | dh_pub_cmp, | |
627 | dh_public_print, | |
628 | ||
629 | dh_priv_decode, | |
630 | dh_priv_encode, | |
631 | dh_private_print, | |
632 | ||
633 | int_dh_size, | |
634 | dh_bits, | |
635 | dh_security_bits, | |
636 | ||
637 | dh_param_decode, | |
638 | dh_param_encode, | |
639 | dh_missing_parameters, | |
640 | dh_copy_parameters, | |
641 | dh_cmp_parameters, | |
642 | dh_param_print, | |
643 | 0, | |
644 | ||
645 | int_dh_free, | |
646 | dh_pkey_ctrl | |
647 | }; | |
648 | ||
bd59f2b9 DSH |
649 | #ifndef OPENSSL_NO_CMS |
650 | ||
651 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
652 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
653 | { | |
654 | ASN1_OBJECT *aoid; | |
655 | int atype; | |
656 | void *aval; | |
657 | ASN1_INTEGER *public_key = NULL; | |
658 | int rv = 0; | |
659 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
660 | DH *dhpeer = NULL; | |
661 | const unsigned char *p; | |
662 | int plen; | |
663 | ||
664 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
665 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
666 | goto err; | |
667 | /* Only absent parameters allowed in RFC XXXX */ | |
668 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
669 | goto err; | |
670 | ||
671 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
672 | if (!pk) | |
673 | goto err; | |
674 | if (pk->type != EVP_PKEY_DHX) | |
675 | goto err; | |
676 | /* Get parameters from parent key */ | |
677 | dhpeer = DHparams_dup(pk->pkey.dh); | |
678 | /* We have parameters now set public key */ | |
679 | plen = ASN1_STRING_length(pubkey); | |
680 | p = ASN1_STRING_data(pubkey); | |
681 | if (!p || !plen) | |
682 | goto err; | |
683 | ||
75ebbd9a | 684 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
685 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
686 | goto err; | |
687 | } | |
688 | ||
689 | /* We have parameters now set public key */ | |
75ebbd9a | 690 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
691 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
692 | goto err; | |
693 | } | |
694 | ||
695 | pkpeer = EVP_PKEY_new(); | |
696 | if (!pkpeer) | |
697 | goto err; | |
698 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
699 | dhpeer = NULL; | |
700 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
701 | rv = 1; | |
702 | err: | |
2ace7450 | 703 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 704 | EVP_PKEY_free(pkpeer); |
d6407083 | 705 | DH_free(dhpeer); |
0f113f3e MC |
706 | return rv; |
707 | } | |
bd59f2b9 DSH |
708 | |
709 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
710 | { |
711 | int rv = 0; | |
712 | ||
713 | X509_ALGOR *alg, *kekalg = NULL; | |
714 | ASN1_OCTET_STRING *ukm; | |
715 | const unsigned char *p; | |
716 | unsigned char *dukm = NULL; | |
717 | size_t dukmlen = 0; | |
718 | int keylen, plen; | |
719 | const EVP_CIPHER *kekcipher; | |
720 | EVP_CIPHER_CTX *kekctx; | |
721 | ||
722 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
723 | goto err; | |
724 | ||
725 | /* | |
726 | * For DH we only have one OID permissible. If ever any more get defined | |
727 | * we will need something cleverer. | |
728 | */ | |
729 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
730 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
731 | goto err; | |
732 | } | |
733 | ||
734 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
735 | goto err; | |
736 | ||
737 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
738 | goto err; | |
739 | ||
740 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
741 | goto err; | |
742 | ||
743 | p = alg->parameter->value.sequence->data; | |
744 | plen = alg->parameter->value.sequence->length; | |
745 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
746 | if (!kekalg) | |
747 | goto err; | |
748 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
749 | if (!kekctx) | |
750 | goto err; | |
751 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
752 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
753 | goto err; | |
754 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
755 | goto err; | |
756 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
757 | goto err; | |
758 | ||
759 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
760 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
761 | goto err; | |
762 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
763 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
764 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
765 | <= 0) | |
766 | goto err; | |
767 | ||
768 | if (ukm) { | |
769 | dukmlen = ASN1_STRING_length(ukm); | |
770 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
771 | if (!dukm) | |
772 | goto err; | |
773 | } | |
774 | ||
775 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
776 | goto err; | |
777 | dukm = NULL; | |
778 | ||
779 | rv = 1; | |
780 | err: | |
222561fe RS |
781 | X509_ALGOR_free(kekalg); |
782 | OPENSSL_free(dukm); | |
0f113f3e MC |
783 | return rv; |
784 | } | |
bd59f2b9 DSH |
785 | |
786 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
787 | { |
788 | EVP_PKEY_CTX *pctx; | |
789 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
790 | if (!pctx) | |
791 | return 0; | |
792 | /* See if we need to set peer key */ | |
793 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
794 | X509_ALGOR *alg; | |
795 | ASN1_BIT_STRING *pubkey; | |
796 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
797 | NULL, NULL, NULL)) | |
798 | return 0; | |
799 | if (!alg || !pubkey) | |
800 | return 0; | |
801 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
802 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
803 | return 0; | |
804 | } | |
805 | } | |
806 | /* Set DH derivation parameters and initialise unwrap context */ | |
807 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
808 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
809 | return 0; | |
810 | } | |
811 | return 1; | |
812 | } | |
bd59f2b9 DSH |
813 | |
814 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
815 | { |
816 | EVP_PKEY_CTX *pctx; | |
817 | EVP_PKEY *pkey; | |
818 | EVP_CIPHER_CTX *ctx; | |
819 | int keylen; | |
820 | X509_ALGOR *talg, *wrap_alg = NULL; | |
821 | ASN1_OBJECT *aoid; | |
822 | ASN1_BIT_STRING *pubkey; | |
823 | ASN1_STRING *wrap_str; | |
824 | ASN1_OCTET_STRING *ukm; | |
825 | unsigned char *penc = NULL, *dukm = NULL; | |
826 | int penclen; | |
827 | size_t dukmlen = 0; | |
828 | int rv = 0; | |
829 | int kdf_type, wrap_nid; | |
830 | const EVP_MD *kdf_md; | |
831 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
832 | if (!pctx) | |
833 | return 0; | |
834 | /* Get ephemeral key */ | |
835 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
836 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
837 | NULL, NULL, NULL)) | |
838 | goto err; | |
839 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
840 | /* Is everything uninitialised? */ | |
841 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 842 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
0f113f3e MC |
843 | if (!pubk) |
844 | goto err; | |
845 | /* Set the key */ | |
846 | ||
847 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
848 | ASN1_INTEGER_free(pubk); | |
849 | if (penclen <= 0) | |
850 | goto err; | |
851 | ASN1_STRING_set0(pubkey, penc, penclen); | |
852 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
853 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
854 | ||
855 | penc = NULL; | |
856 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
857 | V_ASN1_UNDEF, NULL); | |
858 | } | |
859 | ||
860 | /* See if custom paraneters set */ | |
861 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); | |
862 | if (kdf_type <= 0) | |
863 | goto err; | |
864 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
865 | goto err; | |
866 | ||
867 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
868 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
869 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
870 | goto err; | |
871 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
872 | /* Unknown KDF */ | |
873 | goto err; | |
874 | if (kdf_md == NULL) { | |
875 | /* Only SHA1 supported */ | |
876 | kdf_md = EVP_sha1(); | |
877 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
878 | goto err; | |
879 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
880 | /* Unsupported digest */ | |
881 | goto err; | |
882 | ||
883 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
884 | goto err; | |
885 | ||
886 | /* Get wrap NID */ | |
887 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
888 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
889 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
890 | goto err; | |
891 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
892 | ||
893 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
894 | ||
895 | wrap_alg = X509_ALGOR_new(); | |
896 | if (!wrap_alg) | |
897 | goto err; | |
898 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
899 | wrap_alg->parameter = ASN1_TYPE_new(); | |
900 | if (!wrap_alg->parameter) | |
901 | goto err; | |
902 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
903 | goto err; | |
904 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
905 | ASN1_TYPE_free(wrap_alg->parameter); | |
906 | wrap_alg->parameter = NULL; | |
907 | } | |
908 | ||
909 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
910 | goto err; | |
911 | ||
912 | if (ukm) { | |
913 | dukmlen = ASN1_STRING_length(ukm); | |
914 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
915 | if (!dukm) | |
916 | goto err; | |
917 | } | |
918 | ||
919 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
920 | goto err; | |
921 | dukm = NULL; | |
922 | ||
923 | /* | |
924 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
925 | * of another AlgorithmIdentifier. | |
926 | */ | |
927 | penc = NULL; | |
928 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
929 | if (!penc || !penclen) | |
930 | goto err; | |
931 | wrap_str = ASN1_STRING_new(); | |
932 | if (!wrap_str) | |
933 | goto err; | |
934 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
935 | penc = NULL; | |
936 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
937 | V_ASN1_SEQUENCE, wrap_str); | |
938 | ||
939 | rv = 1; | |
940 | ||
941 | err: | |
222561fe RS |
942 | OPENSSL_free(penc); |
943 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
944 | return rv; |
945 | } | |
bd59f2b9 DSH |
946 | |
947 | #endif |