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Commit | Line | Data |
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0f113f3e | 1 | /* |
aa6bb135 | 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved. |
adbc603d | 3 | * |
e38873f5 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
adbc603d DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
adbc603d DSH |
12 | #include <openssl/x509.h> |
13 | #include <openssl/asn1.h> | |
706457b7 | 14 | #include "dh_local.h" |
1e26a8ba | 15 | #include <openssl/bn.h> |
25f2138b DMSP |
16 | #include "crypto/asn1.h" |
17 | #include "crypto/evp.h" | |
3c27208f | 18 | #include <openssl/cms.h> |
8b84b075 RL |
19 | #include <openssl/core_names.h> |
20 | #include "internal/param_build.h" | |
adbc603d | 21 | |
0f113f3e MC |
22 | /* |
23 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
24 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
25 | */ |
26 | ||
0f113f3e MC |
27 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
28 | long length) | |
29 | { | |
30 | if (pkey->ameth == &dhx_asn1_meth) | |
31 | return d2i_DHxparams(NULL, pp, length); | |
32 | return d2i_DHparams(NULL, pp, length); | |
33 | } | |
afb14cda DSH |
34 | |
35 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
36 | { |
37 | if (pkey->ameth == &dhx_asn1_meth) | |
38 | return i2d_DHxparams(a, pp); | |
39 | return i2d_DHparams(a, pp); | |
40 | } | |
afb14cda | 41 | |
adbc603d | 42 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
43 | { |
44 | DH_free(pkey->pkey.dh); | |
45 | } | |
adbc603d | 46 | |
ceb46789 | 47 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
48 | { |
49 | const unsigned char *p, *pm; | |
50 | int pklen, pmlen; | |
51 | int ptype; | |
ac4e2577 DSH |
52 | const void *pval; |
53 | const ASN1_STRING *pstr; | |
0f113f3e MC |
54 | X509_ALGOR *palg; |
55 | ASN1_INTEGER *public_key = NULL; | |
56 | ||
57 | DH *dh = NULL; | |
58 | ||
59 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
60 | return 0; | |
61 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
62 | ||
63 | if (ptype != V_ASN1_SEQUENCE) { | |
64 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
65 | goto err; | |
66 | } | |
67 | ||
68 | pstr = pval; | |
69 | pm = pstr->data; | |
70 | pmlen = pstr->length; | |
71 | ||
75ebbd9a | 72 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
73 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
74 | goto err; | |
75 | } | |
76 | ||
75ebbd9a | 77 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
78 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
79 | goto err; | |
80 | } | |
81 | ||
82 | /* We have parameters now set public key */ | |
75ebbd9a | 83 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
84 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
85 | goto err; | |
86 | } | |
87 | ||
88 | ASN1_INTEGER_free(public_key); | |
89 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
90 | return 1; | |
91 | ||
92 | err: | |
2ace7450 | 93 | ASN1_INTEGER_free(public_key); |
d6407083 | 94 | DH_free(dh); |
0f113f3e | 95 | return 0; |
4c97a04e | 96 | |
0f113f3e | 97 | } |
4c97a04e | 98 | |
0f113f3e MC |
99 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
100 | { | |
101 | DH *dh; | |
0f113f3e MC |
102 | int ptype; |
103 | unsigned char *penc = NULL; | |
104 | int penclen; | |
105 | ASN1_STRING *str; | |
106 | ASN1_INTEGER *pub_key = NULL; | |
107 | ||
108 | dh = pkey->pkey.dh; | |
109 | ||
110 | str = ASN1_STRING_new(); | |
90945fa3 | 111 | if (str == NULL) { |
6aa8dab2 MC |
112 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
113 | goto err; | |
114 | } | |
0f113f3e MC |
115 | str->length = i2d_dhp(pkey, dh, &str->data); |
116 | if (str->length <= 0) { | |
117 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
118 | goto err; | |
119 | } | |
0f113f3e MC |
120 | ptype = V_ASN1_SEQUENCE; |
121 | ||
122 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
12a765a5 | 123 | if (pub_key == NULL) |
0f113f3e MC |
124 | goto err; |
125 | ||
126 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
127 | ||
128 | ASN1_INTEGER_free(pub_key); | |
129 | ||
130 | if (penclen <= 0) { | |
131 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
132 | goto err; | |
133 | } | |
134 | ||
135 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 136 | ptype, str, penc, penclen)) |
0f113f3e MC |
137 | return 1; |
138 | ||
139 | err: | |
b548a1f1 | 140 | OPENSSL_free(penc); |
0dfb9398 | 141 | ASN1_STRING_free(str); |
0f113f3e MC |
142 | |
143 | return 0; | |
144 | } | |
4c97a04e | 145 | |
0f113f3e MC |
146 | /* |
147 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
148 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 149 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 150 | */ |
4c97a04e | 151 | |
245c6bc3 | 152 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
153 | { |
154 | const unsigned char *p, *pm; | |
155 | int pklen, pmlen; | |
156 | int ptype; | |
ac4e2577 DSH |
157 | const void *pval; |
158 | const ASN1_STRING *pstr; | |
245c6bc3 | 159 | const X509_ALGOR *palg; |
0f113f3e | 160 | ASN1_INTEGER *privkey = NULL; |
0f113f3e MC |
161 | DH *dh = NULL; |
162 | ||
163 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
164 | return 0; | |
165 | ||
166 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
167 | ||
168 | if (ptype != V_ASN1_SEQUENCE) | |
169 | goto decerr; | |
75ebbd9a | 170 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
171 | goto decerr; |
172 | ||
173 | pstr = pval; | |
174 | pm = pstr->data; | |
175 | pmlen = pstr->length; | |
75ebbd9a | 176 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 177 | goto decerr; |
75ebbd9a | 178 | |
0f113f3e | 179 | /* We have parameters now set private key */ |
74924dcb RS |
180 | if ((dh->priv_key = BN_secure_new()) == NULL |
181 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
182 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
183 | goto dherr; | |
184 | } | |
8b84b075 | 185 | /* Calculate public key, increments dirty_cnt */ |
0f113f3e MC |
186 | if (!DH_generate_key(dh)) |
187 | goto dherr; | |
188 | ||
189 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
190 | ||
a8ae0891 | 191 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
192 | |
193 | return 1; | |
194 | ||
195 | decerr: | |
196 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
197 | dherr: | |
198 | DH_free(dh); | |
a8ae0891 | 199 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
200 | return 0; |
201 | } | |
4c97a04e DSH |
202 | |
203 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
204 | { | |
0f113f3e MC |
205 | ASN1_STRING *params = NULL; |
206 | ASN1_INTEGER *prkey = NULL; | |
207 | unsigned char *dp = NULL; | |
208 | int dplen; | |
209 | ||
210 | params = ASN1_STRING_new(); | |
211 | ||
90945fa3 | 212 | if (params == NULL) { |
0f113f3e MC |
213 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
214 | goto err; | |
215 | } | |
216 | ||
217 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
218 | if (params->length <= 0) { | |
219 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
220 | goto err; | |
221 | } | |
222 | params->type = V_ASN1_SEQUENCE; | |
223 | ||
224 | /* Get private key into integer */ | |
225 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
226 | ||
12a765a5 | 227 | if (prkey == NULL) { |
0f113f3e MC |
228 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); |
229 | goto err; | |
230 | } | |
231 | ||
232 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
233 | ||
a8ae0891 | 234 | ASN1_STRING_clear_free(prkey); |
1549a265 | 235 | prkey = NULL; |
0f113f3e MC |
236 | |
237 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
238 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
239 | goto err; | |
240 | ||
241 | return 1; | |
242 | ||
243 | err: | |
b548a1f1 | 244 | OPENSSL_free(dp); |
0dfb9398 | 245 | ASN1_STRING_free(params); |
2ace7450 | 246 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 247 | return 0; |
4c97a04e DSH |
248 | } |
249 | ||
3e4585c8 | 250 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
251 | const unsigned char **pder, int derlen) |
252 | { | |
253 | DH *dh; | |
75ebbd9a RS |
254 | |
255 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
256 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
257 | return 0; | |
258 | } | |
8b84b075 | 259 | dh->dirty_cnt++; |
0f113f3e MC |
260 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); |
261 | return 1; | |
262 | } | |
3e4585c8 DSH |
263 | |
264 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
265 | { |
266 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
267 | } | |
3e4585c8 | 268 | |
a773b52a | 269 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 270 | { |
66696478 | 271 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 272 | const char *ktype = NULL; |
0f113f3e MC |
273 | BIGNUM *priv_key, *pub_key; |
274 | ||
275 | if (ptype == 2) | |
276 | priv_key = x->priv_key; | |
277 | else | |
278 | priv_key = NULL; | |
279 | ||
280 | if (ptype > 0) | |
281 | pub_key = x->pub_key; | |
282 | else | |
283 | pub_key = NULL; | |
284 | ||
dc8de3e6 | 285 | if (x->params.p == NULL || (ptype == 2 && priv_key == NULL) |
1d54ef34 | 286 | || (ptype > 0 && pub_key == NULL)) { |
0f113f3e MC |
287 | reason = ERR_R_PASSED_NULL_PARAMETER; |
288 | goto err; | |
289 | } | |
290 | ||
0f113f3e MC |
291 | if (ptype == 2) |
292 | ktype = "DH Private-Key"; | |
293 | else if (ptype == 1) | |
294 | ktype = "DH Public-Key"; | |
295 | else | |
296 | ktype = "DH Parameters"; | |
297 | ||
756f5c6c | 298 | if (!BIO_indent(bp, indent, 128) |
dc8de3e6 | 299 | || BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0) |
0f113f3e MC |
300 | goto err; |
301 | indent += 4; | |
302 | ||
a773b52a | 303 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 304 | goto err; |
a773b52a | 305 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
306 | goto err; |
307 | ||
dc8de3e6 | 308 | if (!ffc_params_print(bp, &x->params, indent)) |
0f113f3e | 309 | goto err; |
756f5c6c | 310 | |
0f113f3e | 311 | if (x->length != 0) { |
756f5c6c P |
312 | if (!BIO_indent(bp, indent, 128) |
313 | || BIO_printf(bp, "recommended-private-length: %d bits\n", | |
314 | (int)x->length) <= 0) | |
0f113f3e MC |
315 | goto err; |
316 | } | |
317 | ||
66696478 RS |
318 | return 1; |
319 | ||
0f113f3e | 320 | err: |
66696478 | 321 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 322 | return 0; |
0f113f3e | 323 | } |
3e4585c8 | 324 | |
ceb46789 | 325 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e | 326 | { |
26a7d938 | 327 | return DH_size(pkey->pkey.dh); |
0f113f3e | 328 | } |
ceb46789 DSH |
329 | |
330 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e | 331 | { |
dc8de3e6 | 332 | return DH_bits(pkey->pkey.dh); |
0f113f3e | 333 | } |
ceb46789 | 334 | |
2514fa79 | 335 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
336 | { |
337 | return DH_security_bits(pkey->pkey.dh); | |
338 | } | |
2514fa79 | 339 | |
ffb1ac67 | 340 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e | 341 | { |
dc8de3e6 SL |
342 | return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params, |
343 | a->ameth != &dhx_asn1_meth); | |
0f113f3e | 344 | } |
ceb46789 | 345 | |
d3cc91ee | 346 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
347 | { |
348 | if (is_x942 == -1) | |
dc8de3e6 SL |
349 | is_x942 = (from->params.q != NULL); |
350 | if (!ffc_params_copy(&to->params, &from->params)) | |
0f113f3e | 351 | return 0; |
dc8de3e6 | 352 | if (!is_x942) |
0f113f3e | 353 | to->length = from->length; |
8b84b075 | 354 | to->dirty_cnt++; |
0f113f3e MC |
355 | return 1; |
356 | } | |
d3cc91ee | 357 | |
9fdcc21f | 358 | DH *DHparams_dup(const DH *dh) |
0f113f3e MC |
359 | { |
360 | DH *ret; | |
361 | ret = DH_new(); | |
90945fa3 | 362 | if (ret == NULL) |
0f113f3e MC |
363 | return NULL; |
364 | if (!int_dh_param_copy(ret, dh, -1)) { | |
365 | DH_free(ret); | |
366 | return NULL; | |
367 | } | |
368 | return ret; | |
369 | } | |
d3cc91ee DSH |
370 | |
371 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 372 | { |
2986ecdc DSH |
373 | if (to->pkey.dh == NULL) { |
374 | to->pkey.dh = DH_new(); | |
375 | if (to->pkey.dh == NULL) | |
376 | return 0; | |
377 | } | |
0f113f3e MC |
378 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
379 | from->ameth == &dhx_asn1_meth); | |
380 | } | |
d3cc91ee | 381 | |
ffb1ac67 | 382 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e | 383 | { |
dc8de3e6 SL |
384 | return a->pkey.dh == NULL |
385 | || a->pkey.dh->params.p == NULL | |
386 | || a->pkey.dh->params.g == NULL; | |
0f113f3e | 387 | } |
ceb46789 DSH |
388 | |
389 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
390 | { |
391 | if (dh_cmp_parameters(a, b) == 0) | |
392 | return 0; | |
393 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
394 | return 0; | |
395 | else | |
396 | return 1; | |
397 | } | |
ceb46789 | 398 | |
3e4585c8 | 399 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
400 | ASN1_PCTX *ctx) |
401 | { | |
a773b52a | 402 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 403 | } |
ceb46789 DSH |
404 | |
405 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
406 | ASN1_PCTX *ctx) |
407 | { | |
a773b52a | 408 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 409 | } |
ceb46789 DSH |
410 | |
411 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
412 | ASN1_PCTX *ctx) |
413 | { | |
a773b52a | 414 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 415 | } |
3e4585c8 DSH |
416 | |
417 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 418 | { |
a773b52a | 419 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 420 | } |
3e4585c8 | 421 | |
bd59f2b9 DSH |
422 | #ifndef OPENSSL_NO_CMS |
423 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
424 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
425 | #endif | |
426 | ||
427 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
9aaecbfc | 428 | { |
429 | switch (op) { | |
430 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: | |
431 | return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1); | |
432 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
433 | return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2); | |
434 | default: | |
435 | return -2; | |
436 | } | |
437 | } | |
438 | ||
439 | static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
440 | { |
441 | switch (op) { | |
bd59f2b9 DSH |
442 | #ifndef OPENSSL_NO_CMS |
443 | ||
0f113f3e MC |
444 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
445 | if (arg1 == 1) | |
446 | return dh_cms_decrypt(arg2); | |
447 | else if (arg1 == 0) | |
448 | return dh_cms_encrypt(arg2); | |
449 | return -2; | |
bd59f2b9 | 450 | |
0f113f3e MC |
451 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
452 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
453 | return 1; | |
bd59f2b9 | 454 | #endif |
0f113f3e MC |
455 | default: |
456 | return -2; | |
457 | } | |
458 | ||
459 | } | |
460 | ||
b0004708 PY |
461 | static int dh_pkey_public_check(const EVP_PKEY *pkey) |
462 | { | |
463 | DH *dh = pkey->pkey.dh; | |
464 | ||
465 | if (dh->pub_key == NULL) { | |
466 | DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | return DH_check_pub_key_ex(dh, dh->pub_key); | |
471 | } | |
472 | ||
473 | static int dh_pkey_param_check(const EVP_PKEY *pkey) | |
474 | { | |
475 | DH *dh = pkey->pkey.dh; | |
476 | ||
477 | return DH_check_ex(dh); | |
478 | } | |
479 | ||
8b84b075 RL |
480 | static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey) |
481 | { | |
482 | return pkey->pkey.dh->dirty_cnt; | |
483 | } | |
484 | ||
b305452f RL |
485 | static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata, |
486 | EVP_KEYMGMT *to_keymgmt) | |
8b84b075 | 487 | { |
b305452f | 488 | DH *dh = from->pkey.dh; |
8b84b075 RL |
489 | OSSL_PARAM_BLD tmpl; |
490 | const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh); | |
491 | const BIGNUM *pub_key = DH_get0_pub_key(dh); | |
492 | const BIGNUM *priv_key = DH_get0_priv_key(dh); | |
493 | OSSL_PARAM *params; | |
b305452f | 494 | int rv; |
8b84b075 | 495 | |
21fb7067 | 496 | if (p == NULL || g == NULL) |
b305452f | 497 | return 0; |
8b84b075 RL |
498 | |
499 | ossl_param_bld_init(&tmpl); | |
4889dadc | 500 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_P, p) |
21fb7067 | 501 | || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_G, g)) |
b305452f | 502 | return 0; |
8b84b075 | 503 | if (q != NULL) { |
4889dadc | 504 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_Q, q)) |
b305452f | 505 | return 0; |
8b84b075 | 506 | } |
b305452f | 507 | /* A key must at least have a public part. */ |
90d3cb57 | 508 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key)) |
b305452f RL |
509 | return 0; |
510 | if (priv_key != NULL) { | |
90d3cb57 | 511 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PRIV_KEY, |
b305452f RL |
512 | priv_key)) |
513 | return 0; | |
8b84b075 RL |
514 | } |
515 | ||
b305452f RL |
516 | if ((params = ossl_param_bld_to_param(&tmpl)) == NULL) |
517 | return 0; | |
8b84b075 RL |
518 | |
519 | /* We export, the provider imports */ | |
b305452f RL |
520 | rv = evp_keymgmt_import(to_keymgmt, to_keydata, OSSL_KEYMGMT_SELECT_ALL, |
521 | params); | |
8b84b075 RL |
522 | |
523 | ossl_param_bld_free(params); | |
b305452f RL |
524 | |
525 | return rv; | |
8b84b075 RL |
526 | } |
527 | ||
0f113f3e MC |
528 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { |
529 | EVP_PKEY_DH, | |
530 | EVP_PKEY_DH, | |
531 | 0, | |
532 | ||
533 | "DH", | |
534 | "OpenSSL PKCS#3 DH method", | |
535 | ||
536 | dh_pub_decode, | |
537 | dh_pub_encode, | |
538 | dh_pub_cmp, | |
539 | dh_public_print, | |
540 | ||
541 | dh_priv_decode, | |
542 | dh_priv_encode, | |
543 | dh_private_print, | |
544 | ||
545 | int_dh_size, | |
546 | dh_bits, | |
547 | dh_security_bits, | |
548 | ||
549 | dh_param_decode, | |
550 | dh_param_encode, | |
551 | dh_missing_parameters, | |
552 | dh_copy_parameters, | |
553 | dh_cmp_parameters, | |
554 | dh_param_print, | |
555 | 0, | |
556 | ||
557 | int_dh_free, | |
9aaecbfc | 558 | dh_pkey_ctrl, |
b0004708 PY |
559 | |
560 | 0, 0, 0, 0, 0, | |
561 | ||
562 | 0, | |
563 | dh_pkey_public_check, | |
8b84b075 RL |
564 | dh_pkey_param_check, |
565 | ||
566 | 0, 0, 0, 0, | |
567 | ||
568 | dh_pkey_dirty_cnt, | |
569 | dh_pkey_export_to, | |
0f113f3e MC |
570 | }; |
571 | ||
572 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
573 | EVP_PKEY_DHX, | |
574 | EVP_PKEY_DHX, | |
575 | 0, | |
576 | ||
577 | "X9.42 DH", | |
578 | "OpenSSL X9.42 DH method", | |
579 | ||
580 | dh_pub_decode, | |
581 | dh_pub_encode, | |
582 | dh_pub_cmp, | |
583 | dh_public_print, | |
584 | ||
585 | dh_priv_decode, | |
586 | dh_priv_encode, | |
587 | dh_private_print, | |
588 | ||
589 | int_dh_size, | |
590 | dh_bits, | |
591 | dh_security_bits, | |
592 | ||
593 | dh_param_decode, | |
594 | dh_param_encode, | |
595 | dh_missing_parameters, | |
596 | dh_copy_parameters, | |
597 | dh_cmp_parameters, | |
598 | dh_param_print, | |
599 | 0, | |
600 | ||
601 | int_dh_free, | |
9aaecbfc | 602 | dhx_pkey_ctrl, |
b0004708 PY |
603 | |
604 | 0, 0, 0, 0, 0, | |
605 | ||
606 | 0, | |
607 | dh_pkey_public_check, | |
608 | dh_pkey_param_check | |
0f113f3e MC |
609 | }; |
610 | ||
bd59f2b9 DSH |
611 | #ifndef OPENSSL_NO_CMS |
612 | ||
613 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
614 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
615 | { | |
ac4e2577 | 616 | const ASN1_OBJECT *aoid; |
0f113f3e | 617 | int atype; |
ac4e2577 | 618 | const void *aval; |
0f113f3e MC |
619 | ASN1_INTEGER *public_key = NULL; |
620 | int rv = 0; | |
621 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
622 | DH *dhpeer = NULL; | |
623 | const unsigned char *p; | |
624 | int plen; | |
625 | ||
626 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
627 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
628 | goto err; | |
629 | /* Only absent parameters allowed in RFC XXXX */ | |
630 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
631 | goto err; | |
632 | ||
633 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
12a765a5 | 634 | if (pk == NULL) |
0f113f3e MC |
635 | goto err; |
636 | if (pk->type != EVP_PKEY_DHX) | |
637 | goto err; | |
638 | /* Get parameters from parent key */ | |
639 | dhpeer = DHparams_dup(pk->pkey.dh); | |
640 | /* We have parameters now set public key */ | |
641 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 642 | p = ASN1_STRING_get0_data(pubkey); |
12a765a5 | 643 | if (p == NULL || plen == 0) |
0f113f3e MC |
644 | goto err; |
645 | ||
75ebbd9a | 646 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
647 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
648 | goto err; | |
649 | } | |
650 | ||
651 | /* We have parameters now set public key */ | |
75ebbd9a | 652 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
653 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
654 | goto err; | |
655 | } | |
656 | ||
657 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 658 | if (pkpeer == NULL) |
0f113f3e MC |
659 | goto err; |
660 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
661 | dhpeer = NULL; | |
662 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
663 | rv = 1; | |
664 | err: | |
2ace7450 | 665 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 666 | EVP_PKEY_free(pkpeer); |
d6407083 | 667 | DH_free(dhpeer); |
0f113f3e MC |
668 | return rv; |
669 | } | |
bd59f2b9 DSH |
670 | |
671 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
672 | { |
673 | int rv = 0; | |
674 | ||
675 | X509_ALGOR *alg, *kekalg = NULL; | |
676 | ASN1_OCTET_STRING *ukm; | |
677 | const unsigned char *p; | |
678 | unsigned char *dukm = NULL; | |
679 | size_t dukmlen = 0; | |
680 | int keylen, plen; | |
681 | const EVP_CIPHER *kekcipher; | |
682 | EVP_CIPHER_CTX *kekctx; | |
683 | ||
684 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
685 | goto err; | |
686 | ||
687 | /* | |
688 | * For DH we only have one OID permissible. If ever any more get defined | |
689 | * we will need something cleverer. | |
690 | */ | |
691 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
692 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
693 | goto err; | |
694 | } | |
695 | ||
696 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
697 | goto err; | |
698 | ||
699 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
700 | goto err; | |
701 | ||
702 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
703 | goto err; | |
704 | ||
705 | p = alg->parameter->value.sequence->data; | |
706 | plen = alg->parameter->value.sequence->length; | |
707 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
708 | if (!kekalg) | |
709 | goto err; | |
710 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
711 | if (!kekctx) | |
712 | goto err; | |
713 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
714 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
715 | goto err; | |
716 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
717 | goto err; | |
718 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
719 | goto err; | |
720 | ||
721 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
722 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
723 | goto err; | |
724 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
725 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
726 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
727 | <= 0) | |
728 | goto err; | |
729 | ||
730 | if (ukm) { | |
731 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 732 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
733 | if (!dukm) |
734 | goto err; | |
735 | } | |
736 | ||
737 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
738 | goto err; | |
739 | dukm = NULL; | |
740 | ||
741 | rv = 1; | |
742 | err: | |
222561fe RS |
743 | X509_ALGOR_free(kekalg); |
744 | OPENSSL_free(dukm); | |
0f113f3e MC |
745 | return rv; |
746 | } | |
bd59f2b9 DSH |
747 | |
748 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
749 | { |
750 | EVP_PKEY_CTX *pctx; | |
dc8de3e6 | 751 | |
0f113f3e | 752 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 RS |
753 | |
754 | if (pctx == NULL) | |
0f113f3e MC |
755 | return 0; |
756 | /* See if we need to set peer key */ | |
757 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
758 | X509_ALGOR *alg; | |
759 | ASN1_BIT_STRING *pubkey; | |
760 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
761 | NULL, NULL, NULL)) | |
762 | return 0; | |
763 | if (!alg || !pubkey) | |
764 | return 0; | |
765 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
766 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
767 | return 0; | |
768 | } | |
769 | } | |
770 | /* Set DH derivation parameters and initialise unwrap context */ | |
771 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
772 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
773 | return 0; | |
774 | } | |
775 | return 1; | |
776 | } | |
bd59f2b9 DSH |
777 | |
778 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
779 | { |
780 | EVP_PKEY_CTX *pctx; | |
781 | EVP_PKEY *pkey; | |
782 | EVP_CIPHER_CTX *ctx; | |
783 | int keylen; | |
784 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 785 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
786 | ASN1_BIT_STRING *pubkey; |
787 | ASN1_STRING *wrap_str; | |
788 | ASN1_OCTET_STRING *ukm; | |
789 | unsigned char *penc = NULL, *dukm = NULL; | |
790 | int penclen; | |
791 | size_t dukmlen = 0; | |
792 | int rv = 0; | |
793 | int kdf_type, wrap_nid; | |
794 | const EVP_MD *kdf_md; | |
12a765a5 | 795 | |
0f113f3e | 796 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 | 797 | if (pctx == NULL) |
0f113f3e MC |
798 | return 0; |
799 | /* Get ephemeral key */ | |
800 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
801 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
802 | NULL, NULL, NULL)) | |
803 | goto err; | |
804 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
805 | /* Is everything uninitialised? */ | |
806 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 807 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
12a765a5 RS |
808 | |
809 | if (pubk == NULL) | |
0f113f3e MC |
810 | goto err; |
811 | /* Set the key */ | |
812 | ||
813 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
814 | ASN1_INTEGER_free(pubk); | |
815 | if (penclen <= 0) | |
816 | goto err; | |
817 | ASN1_STRING_set0(pubkey, penc, penclen); | |
818 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
819 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
820 | ||
821 | penc = NULL; | |
822 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
823 | V_ASN1_UNDEF, NULL); | |
824 | } | |
825 | ||
0d4fb843 | 826 | /* See if custom parameters set */ |
0f113f3e MC |
827 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
828 | if (kdf_type <= 0) | |
829 | goto err; | |
830 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
831 | goto err; | |
832 | ||
833 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
834 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
835 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
836 | goto err; | |
837 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
838 | /* Unknown KDF */ | |
839 | goto err; | |
840 | if (kdf_md == NULL) { | |
841 | /* Only SHA1 supported */ | |
842 | kdf_md = EVP_sha1(); | |
843 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
844 | goto err; | |
845 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
846 | /* Unsupported digest */ | |
847 | goto err; | |
848 | ||
849 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
850 | goto err; | |
851 | ||
852 | /* Get wrap NID */ | |
853 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
854 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
855 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
856 | goto err; | |
857 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
858 | ||
859 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
860 | ||
861 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 862 | if (wrap_alg == NULL) |
0f113f3e MC |
863 | goto err; |
864 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
865 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 866 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
867 | goto err; |
868 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
869 | goto err; | |
870 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
871 | ASN1_TYPE_free(wrap_alg->parameter); | |
872 | wrap_alg->parameter = NULL; | |
873 | } | |
874 | ||
875 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
876 | goto err; | |
877 | ||
878 | if (ukm) { | |
879 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 880 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
881 | if (!dukm) |
882 | goto err; | |
883 | } | |
884 | ||
885 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
886 | goto err; | |
887 | dukm = NULL; | |
888 | ||
889 | /* | |
890 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
891 | * of another AlgorithmIdentifier. | |
892 | */ | |
893 | penc = NULL; | |
894 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
12a765a5 | 895 | if (penc == NULL || penclen == 0) |
0f113f3e MC |
896 | goto err; |
897 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 898 | if (wrap_str == NULL) |
0f113f3e MC |
899 | goto err; |
900 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
901 | penc = NULL; | |
902 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
903 | V_ASN1_SEQUENCE, wrap_str); | |
904 | ||
905 | rv = 1; | |
906 | ||
907 | err: | |
222561fe RS |
908 | OPENSSL_free(penc); |
909 | X509_ALGOR_free(wrap_alg); | |
6624e1f7 | 910 | OPENSSL_free(dukm); |
0f113f3e MC |
911 | return rv; |
912 | } | |
bd59f2b9 DSH |
913 | |
914 | #endif |