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Commit | Line | Data |
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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2006. | |
adbc603d DSH |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
adbc603d DSH |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
61 | #include <openssl/x509.h> | |
62 | #include <openssl/asn1.h> | |
63 | #include <openssl/dh.h> | |
1e26a8ba | 64 | #include <openssl/bn.h> |
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 | ||
122 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) { | |
123 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
124 | goto err; | |
125 | } | |
126 | ||
127 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { | |
128 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
129 | goto err; | |
130 | } | |
131 | ||
132 | /* We have parameters now set public key */ | |
133 | if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
134 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); | |
135 | goto err; | |
136 | } | |
137 | ||
138 | ASN1_INTEGER_free(public_key); | |
139 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
140 | return 1; | |
141 | ||
142 | err: | |
143 | if (public_key) | |
144 | ASN1_INTEGER_free(public_key); | |
d6407083 | 145 | DH_free(dh); |
0f113f3e | 146 | return 0; |
4c97a04e | 147 | |
0f113f3e | 148 | } |
4c97a04e | 149 | |
0f113f3e MC |
150 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
151 | { | |
152 | DH *dh; | |
0f113f3e MC |
153 | int ptype; |
154 | unsigned char *penc = NULL; | |
155 | int penclen; | |
156 | ASN1_STRING *str; | |
157 | ASN1_INTEGER *pub_key = NULL; | |
158 | ||
159 | dh = pkey->pkey.dh; | |
160 | ||
161 | str = ASN1_STRING_new(); | |
6aa8dab2 MC |
162 | if(!str) { |
163 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
164 | goto err; | |
165 | } | |
0f113f3e MC |
166 | str->length = i2d_dhp(pkey, dh, &str->data); |
167 | if (str->length <= 0) { | |
168 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
169 | goto err; | |
170 | } | |
0f113f3e MC |
171 | ptype = V_ASN1_SEQUENCE; |
172 | ||
173 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
174 | if (!pub_key) | |
175 | goto err; | |
176 | ||
177 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
178 | ||
179 | ASN1_INTEGER_free(pub_key); | |
180 | ||
181 | if (penclen <= 0) { | |
182 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
183 | goto err; | |
184 | } | |
185 | ||
186 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 187 | ptype, str, penc, penclen)) |
0f113f3e MC |
188 | return 1; |
189 | ||
190 | err: | |
191 | if (penc) | |
192 | OPENSSL_free(penc); | |
0dfb9398 | 193 | ASN1_STRING_free(str); |
0f113f3e MC |
194 | |
195 | return 0; | |
196 | } | |
4c97a04e | 197 | |
0f113f3e MC |
198 | /* |
199 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
200 | * the AlgorithmIdentifier contains the parameters, the private key is | |
201 | * explcitly included and the pubkey must be recalculated. | |
202 | */ | |
4c97a04e | 203 | |
0f113f3e MC |
204 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
205 | { | |
206 | const unsigned char *p, *pm; | |
207 | int pklen, pmlen; | |
208 | int ptype; | |
209 | void *pval; | |
210 | ASN1_STRING *pstr; | |
211 | X509_ALGOR *palg; | |
212 | ASN1_INTEGER *privkey = NULL; | |
213 | ||
214 | DH *dh = NULL; | |
215 | ||
216 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
217 | return 0; | |
218 | ||
219 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
220 | ||
221 | if (ptype != V_ASN1_SEQUENCE) | |
222 | goto decerr; | |
223 | ||
224 | if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) | |
225 | goto decerr; | |
226 | ||
227 | pstr = pval; | |
228 | pm = pstr->data; | |
229 | pmlen = pstr->length; | |
230 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) | |
231 | goto decerr; | |
232 | /* We have parameters now set private key */ | |
233 | if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { | |
234 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); | |
235 | goto dherr; | |
236 | } | |
237 | /* Calculate public key */ | |
238 | if (!DH_generate_key(dh)) | |
239 | goto dherr; | |
240 | ||
241 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
242 | ||
a8ae0891 | 243 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
244 | |
245 | return 1; | |
246 | ||
247 | decerr: | |
248 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
249 | dherr: | |
250 | DH_free(dh); | |
a8ae0891 | 251 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
252 | return 0; |
253 | } | |
4c97a04e DSH |
254 | |
255 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
256 | { | |
0f113f3e MC |
257 | ASN1_STRING *params = NULL; |
258 | ASN1_INTEGER *prkey = NULL; | |
259 | unsigned char *dp = NULL; | |
260 | int dplen; | |
261 | ||
262 | params = ASN1_STRING_new(); | |
263 | ||
264 | if (!params) { | |
265 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
266 | goto err; | |
267 | } | |
268 | ||
269 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
270 | if (params->length <= 0) { | |
271 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
272 | goto err; | |
273 | } | |
274 | params->type = V_ASN1_SEQUENCE; | |
275 | ||
276 | /* Get private key into integer */ | |
277 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
278 | ||
279 | if (!prkey) { | |
280 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
281 | goto err; | |
282 | } | |
283 | ||
284 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
285 | ||
a8ae0891 | 286 | ASN1_STRING_clear_free(prkey); |
1549a265 | 287 | prkey = NULL; |
0f113f3e MC |
288 | |
289 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
290 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
291 | goto err; | |
292 | ||
293 | return 1; | |
294 | ||
295 | err: | |
296 | if (dp != NULL) | |
297 | OPENSSL_free(dp); | |
0dfb9398 | 298 | ASN1_STRING_free(params); |
0f113f3e | 299 | if (prkey != NULL) |
a8ae0891 | 300 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 301 | return 0; |
4c97a04e DSH |
302 | } |
303 | ||
ceb46789 | 304 | static void update_buflen(const BIGNUM *b, size_t *pbuflen) |
0f113f3e MC |
305 | { |
306 | size_t i; | |
307 | if (!b) | |
308 | return; | |
309 | if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
310 | *pbuflen = i; | |
311 | } | |
ceb46789 | 312 | |
3e4585c8 | 313 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
314 | const unsigned char **pder, int derlen) |
315 | { | |
316 | DH *dh; | |
317 | if (!(dh = d2i_dhp(pkey, pder, derlen))) { | |
318 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); | |
319 | return 0; | |
320 | } | |
321 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
322 | return 1; | |
323 | } | |
3e4585c8 DSH |
324 | |
325 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
326 | { |
327 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
328 | } | |
3e4585c8 | 329 | |
ceb46789 | 330 | static int do_dh_print(BIO *bp, const DH *x, int indent, |
0f113f3e MC |
331 | ASN1_PCTX *ctx, int ptype) |
332 | { | |
333 | unsigned char *m = NULL; | |
334 | int reason = ERR_R_BUF_LIB, ret = 0; | |
335 | size_t buf_len = 0; | |
336 | ||
337 | const char *ktype = NULL; | |
338 | ||
339 | BIGNUM *priv_key, *pub_key; | |
340 | ||
341 | if (ptype == 2) | |
342 | priv_key = x->priv_key; | |
343 | else | |
344 | priv_key = NULL; | |
345 | ||
346 | if (ptype > 0) | |
347 | pub_key = x->pub_key; | |
348 | else | |
349 | pub_key = NULL; | |
350 | ||
351 | update_buflen(x->p, &buf_len); | |
352 | ||
353 | if (buf_len == 0) { | |
354 | reason = ERR_R_PASSED_NULL_PARAMETER; | |
355 | goto err; | |
356 | } | |
357 | ||
358 | update_buflen(x->g, &buf_len); | |
359 | update_buflen(x->q, &buf_len); | |
360 | update_buflen(x->j, &buf_len); | |
361 | update_buflen(x->counter, &buf_len); | |
362 | update_buflen(pub_key, &buf_len); | |
363 | update_buflen(priv_key, &buf_len); | |
364 | ||
365 | if (ptype == 2) | |
366 | ktype = "DH Private-Key"; | |
367 | else if (ptype == 1) | |
368 | ktype = "DH Public-Key"; | |
369 | else | |
370 | ktype = "DH Parameters"; | |
371 | ||
372 | m = OPENSSL_malloc(buf_len + 10); | |
373 | if (m == NULL) { | |
374 | reason = ERR_R_MALLOC_FAILURE; | |
375 | goto err; | |
376 | } | |
377 | ||
378 | BIO_indent(bp, indent, 128); | |
379 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
380 | goto err; | |
381 | indent += 4; | |
382 | ||
383 | if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent)) | |
384 | goto err; | |
385 | if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent)) | |
386 | goto err; | |
387 | ||
388 | if (!ASN1_bn_print(bp, "prime:", x->p, m, indent)) | |
389 | goto err; | |
390 | if (!ASN1_bn_print(bp, "generator:", x->g, m, indent)) | |
391 | goto err; | |
392 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent)) | |
393 | goto err; | |
394 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent)) | |
395 | goto err; | |
396 | if (x->seed) { | |
397 | int i; | |
398 | BIO_indent(bp, indent, 128); | |
399 | BIO_puts(bp, "seed:"); | |
400 | for (i = 0; i < x->seedlen; i++) { | |
401 | if ((i % 15) == 0) { | |
402 | if (BIO_puts(bp, "\n") <= 0 | |
403 | || !BIO_indent(bp, indent + 4, 128)) | |
404 | goto err; | |
405 | } | |
406 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
407 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
408 | goto err; | |
409 | } | |
410 | if (BIO_write(bp, "\n", 1) <= 0) | |
411 | return (0); | |
412 | } | |
413 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent)) | |
414 | goto err; | |
415 | if (x->length != 0) { | |
416 | BIO_indent(bp, indent, 128); | |
417 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
418 | (int)x->length) <= 0) | |
419 | goto err; | |
420 | } | |
421 | ||
422 | ret = 1; | |
423 | if (0) { | |
424 | err: | |
425 | DHerr(DH_F_DO_DH_PRINT, reason); | |
426 | } | |
427 | if (m != NULL) | |
428 | OPENSSL_free(m); | |
429 | return (ret); | |
430 | } | |
3e4585c8 | 431 | |
ceb46789 | 432 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
433 | { |
434 | return (DH_size(pkey->pkey.dh)); | |
435 | } | |
ceb46789 DSH |
436 | |
437 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
438 | { |
439 | return BN_num_bits(pkey->pkey.dh->p); | |
440 | } | |
ceb46789 | 441 | |
2514fa79 | 442 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
443 | { |
444 | return DH_security_bits(pkey->pkey.dh); | |
445 | } | |
2514fa79 | 446 | |
ffb1ac67 | 447 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
448 | { |
449 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
450 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
451 | return 0; | |
452 | else if (a->ameth == &dhx_asn1_meth) { | |
453 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
454 | return 0; | |
455 | } | |
456 | return 1; | |
457 | } | |
ffb1ac67 | 458 | |
d3cc91ee | 459 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
460 | { |
461 | BIGNUM *a; | |
462 | if (src) { | |
463 | a = BN_dup(src); | |
464 | if (!a) | |
465 | return 0; | |
466 | } else | |
467 | a = NULL; | |
468 | if (*dst) | |
469 | BN_free(*dst); | |
470 | *dst = a; | |
471 | return 1; | |
472 | } | |
ceb46789 | 473 | |
d3cc91ee | 474 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
475 | { |
476 | if (is_x942 == -1) | |
477 | is_x942 = ! !from->q; | |
478 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
479 | return 0; | |
480 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
481 | return 0; | |
482 | if (is_x942) { | |
483 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
484 | return 0; | |
485 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
486 | return 0; | |
487 | if (to->seed) { | |
488 | OPENSSL_free(to->seed); | |
489 | to->seed = NULL; | |
490 | to->seedlen = 0; | |
491 | } | |
492 | if (from->seed) { | |
493 | to->seed = BUF_memdup(from->seed, from->seedlen); | |
494 | if (!to->seed) | |
495 | return 0; | |
496 | to->seedlen = from->seedlen; | |
497 | } | |
498 | } else | |
499 | to->length = from->length; | |
500 | return 1; | |
501 | } | |
d3cc91ee DSH |
502 | |
503 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
504 | { |
505 | DH *ret; | |
506 | ret = DH_new(); | |
507 | if (!ret) | |
508 | return NULL; | |
509 | if (!int_dh_param_copy(ret, dh, -1)) { | |
510 | DH_free(ret); | |
511 | return NULL; | |
512 | } | |
513 | return ret; | |
514 | } | |
d3cc91ee DSH |
515 | |
516 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e MC |
517 | { |
518 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, | |
519 | from->ameth == &dhx_asn1_meth); | |
520 | } | |
d3cc91ee | 521 | |
ffb1ac67 | 522 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
523 | { |
524 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
525 | return 1; | |
526 | return 0; | |
527 | } | |
ceb46789 DSH |
528 | |
529 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
530 | { |
531 | if (dh_cmp_parameters(a, b) == 0) | |
532 | return 0; | |
533 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
534 | return 0; | |
535 | else | |
536 | return 1; | |
537 | } | |
ceb46789 | 538 | |
3e4585c8 | 539 | static int dh_param_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, 0); | |
543 | } | |
ceb46789 DSH |
544 | |
545 | static int dh_public_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, 1); | |
549 | } | |
ceb46789 DSH |
550 | |
551 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
552 | ASN1_PCTX *ctx) |
553 | { | |
554 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2); | |
555 | } | |
3e4585c8 DSH |
556 | |
557 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e MC |
558 | { |
559 | return do_dh_print(bp, x, 4, NULL, 0); | |
560 | } | |
3e4585c8 | 561 | |
bd59f2b9 DSH |
562 | #ifndef OPENSSL_NO_CMS |
563 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
564 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
565 | #endif | |
566 | ||
567 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
568 | { |
569 | switch (op) { | |
bd59f2b9 DSH |
570 | #ifndef OPENSSL_NO_CMS |
571 | ||
0f113f3e MC |
572 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
573 | if (arg1 == 1) | |
574 | return dh_cms_decrypt(arg2); | |
575 | else if (arg1 == 0) | |
576 | return dh_cms_encrypt(arg2); | |
577 | return -2; | |
bd59f2b9 | 578 | |
0f113f3e MC |
579 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
580 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
581 | return 1; | |
bd59f2b9 | 582 | #endif |
0f113f3e MC |
583 | default: |
584 | return -2; | |
585 | } | |
586 | ||
587 | } | |
588 | ||
589 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
590 | EVP_PKEY_DH, | |
591 | EVP_PKEY_DH, | |
592 | 0, | |
593 | ||
594 | "DH", | |
595 | "OpenSSL PKCS#3 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 | 0 | |
620 | }; | |
621 | ||
622 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
623 | EVP_PKEY_DHX, | |
624 | EVP_PKEY_DHX, | |
625 | 0, | |
626 | ||
627 | "X9.42 DH", | |
628 | "OpenSSL X9.42 DH method", | |
629 | ||
630 | dh_pub_decode, | |
631 | dh_pub_encode, | |
632 | dh_pub_cmp, | |
633 | dh_public_print, | |
634 | ||
635 | dh_priv_decode, | |
636 | dh_priv_encode, | |
637 | dh_private_print, | |
638 | ||
639 | int_dh_size, | |
640 | dh_bits, | |
641 | dh_security_bits, | |
642 | ||
643 | dh_param_decode, | |
644 | dh_param_encode, | |
645 | dh_missing_parameters, | |
646 | dh_copy_parameters, | |
647 | dh_cmp_parameters, | |
648 | dh_param_print, | |
649 | 0, | |
650 | ||
651 | int_dh_free, | |
652 | dh_pkey_ctrl | |
653 | }; | |
654 | ||
bd59f2b9 DSH |
655 | #ifndef OPENSSL_NO_CMS |
656 | ||
657 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
658 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
659 | { | |
660 | ASN1_OBJECT *aoid; | |
661 | int atype; | |
662 | void *aval; | |
663 | ASN1_INTEGER *public_key = NULL; | |
664 | int rv = 0; | |
665 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
666 | DH *dhpeer = NULL; | |
667 | const unsigned char *p; | |
668 | int plen; | |
669 | ||
670 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
671 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
672 | goto err; | |
673 | /* Only absent parameters allowed in RFC XXXX */ | |
674 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
675 | goto err; | |
676 | ||
677 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
678 | if (!pk) | |
679 | goto err; | |
680 | if (pk->type != EVP_PKEY_DHX) | |
681 | goto err; | |
682 | /* Get parameters from parent key */ | |
683 | dhpeer = DHparams_dup(pk->pkey.dh); | |
684 | /* We have parameters now set public key */ | |
685 | plen = ASN1_STRING_length(pubkey); | |
686 | p = ASN1_STRING_data(pubkey); | |
687 | if (!p || !plen) | |
688 | goto err; | |
689 | ||
690 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, plen))) { | |
691 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); | |
692 | goto err; | |
693 | } | |
694 | ||
695 | /* We have parameters now set public key */ | |
696 | if (!(dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
697 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); | |
698 | goto err; | |
699 | } | |
700 | ||
701 | pkpeer = EVP_PKEY_new(); | |
702 | if (!pkpeer) | |
703 | goto err; | |
704 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
705 | dhpeer = NULL; | |
706 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
707 | rv = 1; | |
708 | err: | |
709 | if (public_key) | |
710 | ASN1_INTEGER_free(public_key); | |
711 | if (pkpeer) | |
712 | EVP_PKEY_free(pkpeer); | |
d6407083 | 713 | DH_free(dhpeer); |
0f113f3e MC |
714 | return rv; |
715 | } | |
bd59f2b9 DSH |
716 | |
717 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
718 | { |
719 | int rv = 0; | |
720 | ||
721 | X509_ALGOR *alg, *kekalg = NULL; | |
722 | ASN1_OCTET_STRING *ukm; | |
723 | const unsigned char *p; | |
724 | unsigned char *dukm = NULL; | |
725 | size_t dukmlen = 0; | |
726 | int keylen, plen; | |
727 | const EVP_CIPHER *kekcipher; | |
728 | EVP_CIPHER_CTX *kekctx; | |
729 | ||
730 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
731 | goto err; | |
732 | ||
733 | /* | |
734 | * For DH we only have one OID permissible. If ever any more get defined | |
735 | * we will need something cleverer. | |
736 | */ | |
737 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
738 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
739 | goto err; | |
740 | } | |
741 | ||
742 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
743 | goto err; | |
744 | ||
745 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
746 | goto err; | |
747 | ||
748 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
749 | goto err; | |
750 | ||
751 | p = alg->parameter->value.sequence->data; | |
752 | plen = alg->parameter->value.sequence->length; | |
753 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
754 | if (!kekalg) | |
755 | goto err; | |
756 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
757 | if (!kekctx) | |
758 | goto err; | |
759 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
760 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
761 | goto err; | |
762 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
763 | goto err; | |
764 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
765 | goto err; | |
766 | ||
767 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
768 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
769 | goto err; | |
770 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
771 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
772 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
773 | <= 0) | |
774 | goto err; | |
775 | ||
776 | if (ukm) { | |
777 | dukmlen = ASN1_STRING_length(ukm); | |
778 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
779 | if (!dukm) | |
780 | goto err; | |
781 | } | |
782 | ||
783 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
784 | goto err; | |
785 | dukm = NULL; | |
786 | ||
787 | rv = 1; | |
788 | err: | |
789 | if (kekalg) | |
790 | X509_ALGOR_free(kekalg); | |
791 | if (dukm) | |
792 | OPENSSL_free(dukm); | |
793 | return rv; | |
794 | } | |
bd59f2b9 DSH |
795 | |
796 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
797 | { |
798 | EVP_PKEY_CTX *pctx; | |
799 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
800 | if (!pctx) | |
801 | return 0; | |
802 | /* See if we need to set peer key */ | |
803 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
804 | X509_ALGOR *alg; | |
805 | ASN1_BIT_STRING *pubkey; | |
806 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
807 | NULL, NULL, NULL)) | |
808 | return 0; | |
809 | if (!alg || !pubkey) | |
810 | return 0; | |
811 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
812 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
813 | return 0; | |
814 | } | |
815 | } | |
816 | /* Set DH derivation parameters and initialise unwrap context */ | |
817 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
818 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
819 | return 0; | |
820 | } | |
821 | return 1; | |
822 | } | |
bd59f2b9 DSH |
823 | |
824 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
825 | { |
826 | EVP_PKEY_CTX *pctx; | |
827 | EVP_PKEY *pkey; | |
828 | EVP_CIPHER_CTX *ctx; | |
829 | int keylen; | |
830 | X509_ALGOR *talg, *wrap_alg = NULL; | |
831 | ASN1_OBJECT *aoid; | |
832 | ASN1_BIT_STRING *pubkey; | |
833 | ASN1_STRING *wrap_str; | |
834 | ASN1_OCTET_STRING *ukm; | |
835 | unsigned char *penc = NULL, *dukm = NULL; | |
836 | int penclen; | |
837 | size_t dukmlen = 0; | |
838 | int rv = 0; | |
839 | int kdf_type, wrap_nid; | |
840 | const EVP_MD *kdf_md; | |
841 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
842 | if (!pctx) | |
843 | return 0; | |
844 | /* Get ephemeral key */ | |
845 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
846 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
847 | NULL, NULL, NULL)) | |
848 | goto err; | |
849 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
850 | /* Is everything uninitialised? */ | |
851 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
852 | ASN1_INTEGER *pubk; | |
853 | pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); | |
854 | if (!pubk) | |
855 | goto err; | |
856 | /* Set the key */ | |
857 | ||
858 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
859 | ASN1_INTEGER_free(pubk); | |
860 | if (penclen <= 0) | |
861 | goto err; | |
862 | ASN1_STRING_set0(pubkey, penc, penclen); | |
863 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
864 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
865 | ||
866 | penc = NULL; | |
867 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
868 | V_ASN1_UNDEF, NULL); | |
869 | } | |
870 | ||
871 | /* See if custom paraneters set */ | |
872 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); | |
873 | if (kdf_type <= 0) | |
874 | goto err; | |
875 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
876 | goto err; | |
877 | ||
878 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
879 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
880 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
881 | goto err; | |
882 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
883 | /* Unknown KDF */ | |
884 | goto err; | |
885 | if (kdf_md == NULL) { | |
886 | /* Only SHA1 supported */ | |
887 | kdf_md = EVP_sha1(); | |
888 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
889 | goto err; | |
890 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
891 | /* Unsupported digest */ | |
892 | goto err; | |
893 | ||
894 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
895 | goto err; | |
896 | ||
897 | /* Get wrap NID */ | |
898 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
899 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
900 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
901 | goto err; | |
902 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
903 | ||
904 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
905 | ||
906 | wrap_alg = X509_ALGOR_new(); | |
907 | if (!wrap_alg) | |
908 | goto err; | |
909 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
910 | wrap_alg->parameter = ASN1_TYPE_new(); | |
911 | if (!wrap_alg->parameter) | |
912 | goto err; | |
913 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
914 | goto err; | |
915 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
916 | ASN1_TYPE_free(wrap_alg->parameter); | |
917 | wrap_alg->parameter = NULL; | |
918 | } | |
919 | ||
920 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
921 | goto err; | |
922 | ||
923 | if (ukm) { | |
924 | dukmlen = ASN1_STRING_length(ukm); | |
925 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
926 | if (!dukm) | |
927 | goto err; | |
928 | } | |
929 | ||
930 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
931 | goto err; | |
932 | dukm = NULL; | |
933 | ||
934 | /* | |
935 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
936 | * of another AlgorithmIdentifier. | |
937 | */ | |
938 | penc = NULL; | |
939 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
940 | if (!penc || !penclen) | |
941 | goto err; | |
942 | wrap_str = ASN1_STRING_new(); | |
943 | if (!wrap_str) | |
944 | goto err; | |
945 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
946 | penc = NULL; | |
947 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
948 | V_ASN1_SEQUENCE, wrap_str); | |
949 | ||
950 | rv = 1; | |
951 | ||
952 | err: | |
953 | if (penc) | |
954 | OPENSSL_free(penc); | |
955 | if (wrap_alg) | |
956 | X509_ALGOR_free(wrap_alg); | |
957 | return rv; | |
958 | } | |
bd59f2b9 DSH |
959 | |
960 | #endif |