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Commit | Line | Data |
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0f113f3e MC |
1 | /* |
2 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
3 | * 2006. | |
adbc603d DSH |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
adbc603d DSH |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
61 | #include <openssl/x509.h> | |
62 | #include <openssl/asn1.h> | |
63 | #include <openssl/dh.h> | |
1e26a8ba | 64 | #include <openssl/bn.h> |
18e377b4 | 65 | #include "asn1_locl.h" |
bd59f2b9 | 66 | #ifndef OPENSSL_NO_CMS |
0f113f3e | 67 | # include <openssl/cms.h> |
bd59f2b9 | 68 | #endif |
adbc603d | 69 | |
afb14cda DSH |
70 | extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth; |
71 | ||
0f113f3e MC |
72 | /* |
73 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
74 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
75 | */ |
76 | ||
0f113f3e MC |
77 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
78 | long length) | |
79 | { | |
80 | if (pkey->ameth == &dhx_asn1_meth) | |
81 | return d2i_DHxparams(NULL, pp, length); | |
82 | return d2i_DHparams(NULL, pp, length); | |
83 | } | |
afb14cda DSH |
84 | |
85 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
86 | { |
87 | if (pkey->ameth == &dhx_asn1_meth) | |
88 | return i2d_DHxparams(a, pp); | |
89 | return i2d_DHparams(a, pp); | |
90 | } | |
afb14cda | 91 | |
adbc603d | 92 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
93 | { |
94 | DH_free(pkey->pkey.dh); | |
95 | } | |
adbc603d | 96 | |
ceb46789 | 97 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
98 | { |
99 | const unsigned char *p, *pm; | |
100 | int pklen, pmlen; | |
101 | int ptype; | |
102 | void *pval; | |
103 | ASN1_STRING *pstr; | |
104 | X509_ALGOR *palg; | |
105 | ASN1_INTEGER *public_key = NULL; | |
106 | ||
107 | DH *dh = NULL; | |
108 | ||
109 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
110 | return 0; | |
111 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
112 | ||
113 | if (ptype != V_ASN1_SEQUENCE) { | |
114 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
115 | goto err; | |
116 | } | |
117 | ||
118 | pstr = pval; | |
119 | pm = pstr->data; | |
120 | pmlen = pstr->length; | |
121 | ||
122 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) { | |
123 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
124 | goto err; | |
125 | } | |
126 | ||
127 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { | |
128 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); | |
129 | goto err; | |
130 | } | |
131 | ||
132 | /* We have parameters now set public key */ | |
133 | if (!(dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
134 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); | |
135 | goto err; | |
136 | } | |
137 | ||
138 | ASN1_INTEGER_free(public_key); | |
139 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
140 | return 1; | |
141 | ||
142 | err: | |
143 | if (public_key) | |
144 | ASN1_INTEGER_free(public_key); | |
145 | if (dh) | |
146 | DH_free(dh); | |
147 | return 0; | |
4c97a04e | 148 | |
0f113f3e | 149 | } |
4c97a04e | 150 | |
0f113f3e MC |
151 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
152 | { | |
153 | DH *dh; | |
0f113f3e MC |
154 | int ptype; |
155 | unsigned char *penc = NULL; | |
156 | int penclen; | |
157 | ASN1_STRING *str; | |
158 | ASN1_INTEGER *pub_key = NULL; | |
159 | ||
160 | dh = pkey->pkey.dh; | |
161 | ||
162 | str = ASN1_STRING_new(); | |
6aa8dab2 MC |
163 | if(!str) { |
164 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
165 | goto err; | |
166 | } | |
0f113f3e MC |
167 | str->length = i2d_dhp(pkey, dh, &str->data); |
168 | if (str->length <= 0) { | |
169 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
170 | goto err; | |
171 | } | |
0f113f3e MC |
172 | ptype = V_ASN1_SEQUENCE; |
173 | ||
174 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
175 | if (!pub_key) | |
176 | goto err; | |
177 | ||
178 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
179 | ||
180 | ASN1_INTEGER_free(pub_key); | |
181 | ||
182 | if (penclen <= 0) { | |
183 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
184 | goto err; | |
185 | } | |
186 | ||
187 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 188 | ptype, str, penc, penclen)) |
0f113f3e MC |
189 | return 1; |
190 | ||
191 | err: | |
192 | if (penc) | |
193 | OPENSSL_free(penc); | |
6aa8dab2 MC |
194 | if (str) |
195 | ASN1_STRING_free(str); | |
0f113f3e MC |
196 | |
197 | return 0; | |
198 | } | |
4c97a04e | 199 | |
0f113f3e MC |
200 | /* |
201 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
202 | * the AlgorithmIdentifier contains the parameters, the private key is | |
203 | * explcitly included and the pubkey must be recalculated. | |
204 | */ | |
4c97a04e | 205 | |
0f113f3e MC |
206 | static int dh_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
207 | { | |
208 | const unsigned char *p, *pm; | |
209 | int pklen, pmlen; | |
210 | int ptype; | |
211 | void *pval; | |
212 | ASN1_STRING *pstr; | |
213 | X509_ALGOR *palg; | |
214 | ASN1_INTEGER *privkey = NULL; | |
215 | ||
216 | DH *dh = NULL; | |
217 | ||
218 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
219 | return 0; | |
220 | ||
221 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
222 | ||
223 | if (ptype != V_ASN1_SEQUENCE) | |
224 | goto decerr; | |
225 | ||
226 | if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) | |
227 | goto decerr; | |
228 | ||
229 | pstr = pval; | |
230 | pm = pstr->data; | |
231 | pmlen = pstr->length; | |
232 | if (!(dh = d2i_dhp(pkey, &pm, pmlen))) | |
233 | goto decerr; | |
234 | /* We have parameters now set private key */ | |
235 | if (!(dh->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { | |
236 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); | |
237 | goto dherr; | |
238 | } | |
239 | /* Calculate public key */ | |
240 | if (!DH_generate_key(dh)) | |
241 | goto dherr; | |
242 | ||
243 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
244 | ||
a8ae0891 | 245 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
246 | |
247 | return 1; | |
248 | ||
249 | decerr: | |
250 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
251 | dherr: | |
252 | DH_free(dh); | |
a8ae0891 | 253 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
254 | return 0; |
255 | } | |
4c97a04e DSH |
256 | |
257 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
258 | { | |
0f113f3e MC |
259 | ASN1_STRING *params = NULL; |
260 | ASN1_INTEGER *prkey = NULL; | |
261 | unsigned char *dp = NULL; | |
262 | int dplen; | |
263 | ||
264 | params = ASN1_STRING_new(); | |
265 | ||
266 | if (!params) { | |
267 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
268 | goto err; | |
269 | } | |
270 | ||
271 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
272 | if (params->length <= 0) { | |
273 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
274 | goto err; | |
275 | } | |
276 | params->type = V_ASN1_SEQUENCE; | |
277 | ||
278 | /* Get private key into integer */ | |
279 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
280 | ||
281 | if (!prkey) { | |
282 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
283 | goto err; | |
284 | } | |
285 | ||
286 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
287 | ||
a8ae0891 | 288 | ASN1_STRING_clear_free(prkey); |
1549a265 | 289 | prkey = NULL; |
0f113f3e MC |
290 | |
291 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
292 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
293 | goto err; | |
294 | ||
295 | return 1; | |
296 | ||
297 | err: | |
298 | if (dp != NULL) | |
299 | OPENSSL_free(dp); | |
300 | if (params != NULL) | |
301 | ASN1_STRING_free(params); | |
302 | if (prkey != NULL) | |
a8ae0891 | 303 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 304 | return 0; |
4c97a04e DSH |
305 | } |
306 | ||
ceb46789 | 307 | static void update_buflen(const BIGNUM *b, size_t *pbuflen) |
0f113f3e MC |
308 | { |
309 | size_t i; | |
310 | if (!b) | |
311 | return; | |
312 | if (*pbuflen < (i = (size_t)BN_num_bytes(b))) | |
313 | *pbuflen = i; | |
314 | } | |
ceb46789 | 315 | |
3e4585c8 | 316 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
317 | const unsigned char **pder, int derlen) |
318 | { | |
319 | DH *dh; | |
320 | if (!(dh = d2i_dhp(pkey, pder, derlen))) { | |
321 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); | |
322 | return 0; | |
323 | } | |
324 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
325 | return 1; | |
326 | } | |
3e4585c8 DSH |
327 | |
328 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
329 | { |
330 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
331 | } | |
3e4585c8 | 332 | |
ceb46789 | 333 | static int do_dh_print(BIO *bp, const DH *x, int indent, |
0f113f3e MC |
334 | ASN1_PCTX *ctx, int ptype) |
335 | { | |
336 | unsigned char *m = NULL; | |
337 | int reason = ERR_R_BUF_LIB, ret = 0; | |
338 | size_t buf_len = 0; | |
339 | ||
340 | const char *ktype = NULL; | |
341 | ||
342 | BIGNUM *priv_key, *pub_key; | |
343 | ||
344 | if (ptype == 2) | |
345 | priv_key = x->priv_key; | |
346 | else | |
347 | priv_key = NULL; | |
348 | ||
349 | if (ptype > 0) | |
350 | pub_key = x->pub_key; | |
351 | else | |
352 | pub_key = NULL; | |
353 | ||
354 | update_buflen(x->p, &buf_len); | |
355 | ||
356 | if (buf_len == 0) { | |
357 | reason = ERR_R_PASSED_NULL_PARAMETER; | |
358 | goto err; | |
359 | } | |
360 | ||
361 | update_buflen(x->g, &buf_len); | |
362 | update_buflen(x->q, &buf_len); | |
363 | update_buflen(x->j, &buf_len); | |
364 | update_buflen(x->counter, &buf_len); | |
365 | update_buflen(pub_key, &buf_len); | |
366 | update_buflen(priv_key, &buf_len); | |
367 | ||
368 | if (ptype == 2) | |
369 | ktype = "DH Private-Key"; | |
370 | else if (ptype == 1) | |
371 | ktype = "DH Public-Key"; | |
372 | else | |
373 | ktype = "DH Parameters"; | |
374 | ||
375 | m = OPENSSL_malloc(buf_len + 10); | |
376 | if (m == NULL) { | |
377 | reason = ERR_R_MALLOC_FAILURE; | |
378 | goto err; | |
379 | } | |
380 | ||
381 | BIO_indent(bp, indent, 128); | |
382 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
383 | goto err; | |
384 | indent += 4; | |
385 | ||
386 | if (!ASN1_bn_print(bp, "private-key:", priv_key, m, indent)) | |
387 | goto err; | |
388 | if (!ASN1_bn_print(bp, "public-key:", pub_key, m, indent)) | |
389 | goto err; | |
390 | ||
391 | if (!ASN1_bn_print(bp, "prime:", x->p, m, indent)) | |
392 | goto err; | |
393 | if (!ASN1_bn_print(bp, "generator:", x->g, m, indent)) | |
394 | goto err; | |
395 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, m, indent)) | |
396 | goto err; | |
397 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, m, indent)) | |
398 | goto err; | |
399 | if (x->seed) { | |
400 | int i; | |
401 | BIO_indent(bp, indent, 128); | |
402 | BIO_puts(bp, "seed:"); | |
403 | for (i = 0; i < x->seedlen; i++) { | |
404 | if ((i % 15) == 0) { | |
405 | if (BIO_puts(bp, "\n") <= 0 | |
406 | || !BIO_indent(bp, indent + 4, 128)) | |
407 | goto err; | |
408 | } | |
409 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
410 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
411 | goto err; | |
412 | } | |
413 | if (BIO_write(bp, "\n", 1) <= 0) | |
414 | return (0); | |
415 | } | |
416 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, m, indent)) | |
417 | goto err; | |
418 | if (x->length != 0) { | |
419 | BIO_indent(bp, indent, 128); | |
420 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
421 | (int)x->length) <= 0) | |
422 | goto err; | |
423 | } | |
424 | ||
425 | ret = 1; | |
426 | if (0) { | |
427 | err: | |
428 | DHerr(DH_F_DO_DH_PRINT, reason); | |
429 | } | |
430 | if (m != NULL) | |
431 | OPENSSL_free(m); | |
432 | return (ret); | |
433 | } | |
3e4585c8 | 434 | |
ceb46789 | 435 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e MC |
436 | { |
437 | return (DH_size(pkey->pkey.dh)); | |
438 | } | |
ceb46789 DSH |
439 | |
440 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
441 | { |
442 | return BN_num_bits(pkey->pkey.dh->p); | |
443 | } | |
ceb46789 | 444 | |
2514fa79 | 445 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
446 | { |
447 | return DH_security_bits(pkey->pkey.dh); | |
448 | } | |
2514fa79 | 449 | |
ffb1ac67 | 450 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
451 | { |
452 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
453 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
454 | return 0; | |
455 | else if (a->ameth == &dhx_asn1_meth) { | |
456 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
457 | return 0; | |
458 | } | |
459 | return 1; | |
460 | } | |
ffb1ac67 | 461 | |
d3cc91ee | 462 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
463 | { |
464 | BIGNUM *a; | |
465 | if (src) { | |
466 | a = BN_dup(src); | |
467 | if (!a) | |
468 | return 0; | |
469 | } else | |
470 | a = NULL; | |
471 | if (*dst) | |
472 | BN_free(*dst); | |
473 | *dst = a; | |
474 | return 1; | |
475 | } | |
ceb46789 | 476 | |
d3cc91ee | 477 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
478 | { |
479 | if (is_x942 == -1) | |
480 | is_x942 = ! !from->q; | |
481 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
482 | return 0; | |
483 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
484 | return 0; | |
485 | if (is_x942) { | |
486 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
487 | return 0; | |
488 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
489 | return 0; | |
490 | if (to->seed) { | |
491 | OPENSSL_free(to->seed); | |
492 | to->seed = NULL; | |
493 | to->seedlen = 0; | |
494 | } | |
495 | if (from->seed) { | |
496 | to->seed = BUF_memdup(from->seed, from->seedlen); | |
497 | if (!to->seed) | |
498 | return 0; | |
499 | to->seedlen = from->seedlen; | |
500 | } | |
501 | } else | |
502 | to->length = from->length; | |
503 | return 1; | |
504 | } | |
d3cc91ee DSH |
505 | |
506 | DH *DHparams_dup(DH *dh) | |
0f113f3e MC |
507 | { |
508 | DH *ret; | |
509 | ret = DH_new(); | |
510 | if (!ret) | |
511 | return NULL; | |
512 | if (!int_dh_param_copy(ret, dh, -1)) { | |
513 | DH_free(ret); | |
514 | return NULL; | |
515 | } | |
516 | return ret; | |
517 | } | |
d3cc91ee DSH |
518 | |
519 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e MC |
520 | { |
521 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, | |
522 | from->ameth == &dhx_asn1_meth); | |
523 | } | |
d3cc91ee | 524 | |
ffb1ac67 | 525 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e MC |
526 | { |
527 | if (!a->pkey.dh->p || !a->pkey.dh->g) | |
528 | return 1; | |
529 | return 0; | |
530 | } | |
ceb46789 DSH |
531 | |
532 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
533 | { |
534 | if (dh_cmp_parameters(a, b) == 0) | |
535 | return 0; | |
536 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
537 | return 0; | |
538 | else | |
539 | return 1; | |
540 | } | |
ceb46789 | 541 | |
3e4585c8 | 542 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
543 | ASN1_PCTX *ctx) |
544 | { | |
545 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 0); | |
546 | } | |
ceb46789 DSH |
547 | |
548 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
549 | ASN1_PCTX *ctx) |
550 | { | |
551 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 1); | |
552 | } | |
ceb46789 DSH |
553 | |
554 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
555 | ASN1_PCTX *ctx) |
556 | { | |
557 | return do_dh_print(bp, pkey->pkey.dh, indent, ctx, 2); | |
558 | } | |
3e4585c8 DSH |
559 | |
560 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e MC |
561 | { |
562 | return do_dh_print(bp, x, 4, NULL, 0); | |
563 | } | |
3e4585c8 | 564 | |
bd59f2b9 DSH |
565 | #ifndef OPENSSL_NO_CMS |
566 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
567 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
568 | #endif | |
569 | ||
570 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
571 | { |
572 | switch (op) { | |
bd59f2b9 DSH |
573 | #ifndef OPENSSL_NO_CMS |
574 | ||
0f113f3e MC |
575 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
576 | if (arg1 == 1) | |
577 | return dh_cms_decrypt(arg2); | |
578 | else if (arg1 == 0) | |
579 | return dh_cms_encrypt(arg2); | |
580 | return -2; | |
bd59f2b9 | 581 | |
0f113f3e MC |
582 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
583 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
584 | return 1; | |
bd59f2b9 | 585 | #endif |
0f113f3e MC |
586 | default: |
587 | return -2; | |
588 | } | |
589 | ||
590 | } | |
591 | ||
592 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { | |
593 | EVP_PKEY_DH, | |
594 | EVP_PKEY_DH, | |
595 | 0, | |
596 | ||
597 | "DH", | |
598 | "OpenSSL PKCS#3 DH method", | |
599 | ||
600 | dh_pub_decode, | |
601 | dh_pub_encode, | |
602 | dh_pub_cmp, | |
603 | dh_public_print, | |
604 | ||
605 | dh_priv_decode, | |
606 | dh_priv_encode, | |
607 | dh_private_print, | |
608 | ||
609 | int_dh_size, | |
610 | dh_bits, | |
611 | dh_security_bits, | |
612 | ||
613 | dh_param_decode, | |
614 | dh_param_encode, | |
615 | dh_missing_parameters, | |
616 | dh_copy_parameters, | |
617 | dh_cmp_parameters, | |
618 | dh_param_print, | |
619 | 0, | |
620 | ||
621 | int_dh_free, | |
622 | 0 | |
623 | }; | |
624 | ||
625 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
626 | EVP_PKEY_DHX, | |
627 | EVP_PKEY_DHX, | |
628 | 0, | |
629 | ||
630 | "X9.42 DH", | |
631 | "OpenSSL X9.42 DH method", | |
632 | ||
633 | dh_pub_decode, | |
634 | dh_pub_encode, | |
635 | dh_pub_cmp, | |
636 | dh_public_print, | |
637 | ||
638 | dh_priv_decode, | |
639 | dh_priv_encode, | |
640 | dh_private_print, | |
641 | ||
642 | int_dh_size, | |
643 | dh_bits, | |
644 | dh_security_bits, | |
645 | ||
646 | dh_param_decode, | |
647 | dh_param_encode, | |
648 | dh_missing_parameters, | |
649 | dh_copy_parameters, | |
650 | dh_cmp_parameters, | |
651 | dh_param_print, | |
652 | 0, | |
653 | ||
654 | int_dh_free, | |
655 | dh_pkey_ctrl | |
656 | }; | |
657 | ||
bd59f2b9 DSH |
658 | #ifndef OPENSSL_NO_CMS |
659 | ||
660 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
661 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
662 | { | |
663 | ASN1_OBJECT *aoid; | |
664 | int atype; | |
665 | void *aval; | |
666 | ASN1_INTEGER *public_key = NULL; | |
667 | int rv = 0; | |
668 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
669 | DH *dhpeer = NULL; | |
670 | const unsigned char *p; | |
671 | int plen; | |
672 | ||
673 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
674 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
675 | goto err; | |
676 | /* Only absent parameters allowed in RFC XXXX */ | |
677 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
678 | goto err; | |
679 | ||
680 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
681 | if (!pk) | |
682 | goto err; | |
683 | if (pk->type != EVP_PKEY_DHX) | |
684 | goto err; | |
685 | /* Get parameters from parent key */ | |
686 | dhpeer = DHparams_dup(pk->pkey.dh); | |
687 | /* We have parameters now set public key */ | |
688 | plen = ASN1_STRING_length(pubkey); | |
689 | p = ASN1_STRING_data(pubkey); | |
690 | if (!p || !plen) | |
691 | goto err; | |
692 | ||
693 | if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, plen))) { | |
694 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); | |
695 | goto err; | |
696 | } | |
697 | ||
698 | /* We have parameters now set public key */ | |
699 | if (!(dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { | |
700 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); | |
701 | goto err; | |
702 | } | |
703 | ||
704 | pkpeer = EVP_PKEY_new(); | |
705 | if (!pkpeer) | |
706 | goto err; | |
707 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
708 | dhpeer = NULL; | |
709 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
710 | rv = 1; | |
711 | err: | |
712 | if (public_key) | |
713 | ASN1_INTEGER_free(public_key); | |
714 | if (pkpeer) | |
715 | EVP_PKEY_free(pkpeer); | |
716 | if (dhpeer) | |
717 | DH_free(dhpeer); | |
718 | return rv; | |
719 | } | |
bd59f2b9 DSH |
720 | |
721 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
722 | { |
723 | int rv = 0; | |
724 | ||
725 | X509_ALGOR *alg, *kekalg = NULL; | |
726 | ASN1_OCTET_STRING *ukm; | |
727 | const unsigned char *p; | |
728 | unsigned char *dukm = NULL; | |
729 | size_t dukmlen = 0; | |
730 | int keylen, plen; | |
731 | const EVP_CIPHER *kekcipher; | |
732 | EVP_CIPHER_CTX *kekctx; | |
733 | ||
734 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
735 | goto err; | |
736 | ||
737 | /* | |
738 | * For DH we only have one OID permissible. If ever any more get defined | |
739 | * we will need something cleverer. | |
740 | */ | |
741 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
742 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
743 | goto err; | |
744 | } | |
745 | ||
746 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
747 | goto err; | |
748 | ||
749 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
750 | goto err; | |
751 | ||
752 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
753 | goto err; | |
754 | ||
755 | p = alg->parameter->value.sequence->data; | |
756 | plen = alg->parameter->value.sequence->length; | |
757 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
758 | if (!kekalg) | |
759 | goto err; | |
760 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
761 | if (!kekctx) | |
762 | goto err; | |
763 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
764 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
765 | goto err; | |
766 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
767 | goto err; | |
768 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
769 | goto err; | |
770 | ||
771 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
772 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
773 | goto err; | |
774 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
775 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
776 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
777 | <= 0) | |
778 | goto err; | |
779 | ||
780 | if (ukm) { | |
781 | dukmlen = ASN1_STRING_length(ukm); | |
782 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
783 | if (!dukm) | |
784 | goto err; | |
785 | } | |
786 | ||
787 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
788 | goto err; | |
789 | dukm = NULL; | |
790 | ||
791 | rv = 1; | |
792 | err: | |
793 | if (kekalg) | |
794 | X509_ALGOR_free(kekalg); | |
795 | if (dukm) | |
796 | OPENSSL_free(dukm); | |
797 | return rv; | |
798 | } | |
bd59f2b9 DSH |
799 | |
800 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
801 | { |
802 | EVP_PKEY_CTX *pctx; | |
803 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
804 | if (!pctx) | |
805 | return 0; | |
806 | /* See if we need to set peer key */ | |
807 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
808 | X509_ALGOR *alg; | |
809 | ASN1_BIT_STRING *pubkey; | |
810 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
811 | NULL, NULL, NULL)) | |
812 | return 0; | |
813 | if (!alg || !pubkey) | |
814 | return 0; | |
815 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
816 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
817 | return 0; | |
818 | } | |
819 | } | |
820 | /* Set DH derivation parameters and initialise unwrap context */ | |
821 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
822 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
823 | return 0; | |
824 | } | |
825 | return 1; | |
826 | } | |
bd59f2b9 DSH |
827 | |
828 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
829 | { |
830 | EVP_PKEY_CTX *pctx; | |
831 | EVP_PKEY *pkey; | |
832 | EVP_CIPHER_CTX *ctx; | |
833 | int keylen; | |
834 | X509_ALGOR *talg, *wrap_alg = NULL; | |
835 | ASN1_OBJECT *aoid; | |
836 | ASN1_BIT_STRING *pubkey; | |
837 | ASN1_STRING *wrap_str; | |
838 | ASN1_OCTET_STRING *ukm; | |
839 | unsigned char *penc = NULL, *dukm = NULL; | |
840 | int penclen; | |
841 | size_t dukmlen = 0; | |
842 | int rv = 0; | |
843 | int kdf_type, wrap_nid; | |
844 | const EVP_MD *kdf_md; | |
845 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
846 | if (!pctx) | |
847 | return 0; | |
848 | /* Get ephemeral key */ | |
849 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
850 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
851 | NULL, NULL, NULL)) | |
852 | goto err; | |
853 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
854 | /* Is everything uninitialised? */ | |
855 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
856 | ASN1_INTEGER *pubk; | |
857 | pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); | |
858 | if (!pubk) | |
859 | goto err; | |
860 | /* Set the key */ | |
861 | ||
862 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
863 | ASN1_INTEGER_free(pubk); | |
864 | if (penclen <= 0) | |
865 | goto err; | |
866 | ASN1_STRING_set0(pubkey, penc, penclen); | |
867 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
868 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
869 | ||
870 | penc = NULL; | |
871 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
872 | V_ASN1_UNDEF, NULL); | |
873 | } | |
874 | ||
875 | /* See if custom paraneters set */ | |
876 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); | |
877 | if (kdf_type <= 0) | |
878 | goto err; | |
879 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
880 | goto err; | |
881 | ||
882 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
883 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
884 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
885 | goto err; | |
886 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
887 | /* Unknown KDF */ | |
888 | goto err; | |
889 | if (kdf_md == NULL) { | |
890 | /* Only SHA1 supported */ | |
891 | kdf_md = EVP_sha1(); | |
892 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
893 | goto err; | |
894 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
895 | /* Unsupported digest */ | |
896 | goto err; | |
897 | ||
898 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
899 | goto err; | |
900 | ||
901 | /* Get wrap NID */ | |
902 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
903 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
904 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
905 | goto err; | |
906 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
907 | ||
908 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
909 | ||
910 | wrap_alg = X509_ALGOR_new(); | |
911 | if (!wrap_alg) | |
912 | goto err; | |
913 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
914 | wrap_alg->parameter = ASN1_TYPE_new(); | |
915 | if (!wrap_alg->parameter) | |
916 | goto err; | |
917 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
918 | goto err; | |
919 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
920 | ASN1_TYPE_free(wrap_alg->parameter); | |
921 | wrap_alg->parameter = NULL; | |
922 | } | |
923 | ||
924 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
925 | goto err; | |
926 | ||
927 | if (ukm) { | |
928 | dukmlen = ASN1_STRING_length(ukm); | |
929 | dukm = BUF_memdup(ASN1_STRING_data(ukm), dukmlen); | |
930 | if (!dukm) | |
931 | goto err; | |
932 | } | |
933 | ||
934 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
935 | goto err; | |
936 | dukm = NULL; | |
937 | ||
938 | /* | |
939 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
940 | * of another AlgorithmIdentifier. | |
941 | */ | |
942 | penc = NULL; | |
943 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
944 | if (!penc || !penclen) | |
945 | goto err; | |
946 | wrap_str = ASN1_STRING_new(); | |
947 | if (!wrap_str) | |
948 | goto err; | |
949 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
950 | penc = NULL; | |
951 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
952 | V_ASN1_SEQUENCE, wrap_str); | |
953 | ||
954 | rv = 1; | |
955 | ||
956 | err: | |
957 | if (penc) | |
958 | OPENSSL_free(penc); | |
959 | if (wrap_alg) | |
960 | X509_ALGOR_free(wrap_alg); | |
961 | return rv; | |
962 | } | |
bd59f2b9 DSH |
963 | |
964 | #endif |