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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 | ||
ada66e78 P |
10 | /* |
11 | * DH low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
adbc603d | 16 | #include <stdio.h> |
b39fc560 | 17 | #include "internal/cryptlib.h" |
adbc603d DSH |
18 | #include <openssl/x509.h> |
19 | #include <openssl/asn1.h> | |
706457b7 | 20 | #include "dh_local.h" |
1e26a8ba | 21 | #include <openssl/bn.h> |
25f2138b DMSP |
22 | #include "crypto/asn1.h" |
23 | #include "crypto/evp.h" | |
3c27208f | 24 | #include <openssl/cms.h> |
8b84b075 RL |
25 | #include <openssl/core_names.h> |
26 | #include "internal/param_build.h" | |
adbc603d | 27 | |
0f113f3e MC |
28 | /* |
29 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
30 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
31 | */ |
32 | ||
0f113f3e MC |
33 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
34 | long length) | |
35 | { | |
36 | if (pkey->ameth == &dhx_asn1_meth) | |
37 | return d2i_DHxparams(NULL, pp, length); | |
38 | return d2i_DHparams(NULL, pp, length); | |
39 | } | |
afb14cda DSH |
40 | |
41 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
42 | { |
43 | if (pkey->ameth == &dhx_asn1_meth) | |
44 | return i2d_DHxparams(a, pp); | |
45 | return i2d_DHparams(a, pp); | |
46 | } | |
afb14cda | 47 | |
adbc603d | 48 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
49 | { |
50 | DH_free(pkey->pkey.dh); | |
51 | } | |
adbc603d | 52 | |
ceb46789 | 53 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
54 | { |
55 | const unsigned char *p, *pm; | |
56 | int pklen, pmlen; | |
57 | int ptype; | |
ac4e2577 DSH |
58 | const void *pval; |
59 | const ASN1_STRING *pstr; | |
0f113f3e MC |
60 | X509_ALGOR *palg; |
61 | ASN1_INTEGER *public_key = NULL; | |
62 | ||
63 | DH *dh = NULL; | |
64 | ||
65 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
66 | return 0; | |
67 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
68 | ||
69 | if (ptype != V_ASN1_SEQUENCE) { | |
70 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
71 | goto err; | |
72 | } | |
73 | ||
74 | pstr = pval; | |
75 | pm = pstr->data; | |
76 | pmlen = pstr->length; | |
77 | ||
75ebbd9a | 78 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
79 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
80 | goto err; | |
81 | } | |
82 | ||
75ebbd9a | 83 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
84 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
85 | goto err; | |
86 | } | |
87 | ||
88 | /* We have parameters now set public key */ | |
75ebbd9a | 89 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
90 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
91 | goto err; | |
92 | } | |
93 | ||
94 | ASN1_INTEGER_free(public_key); | |
95 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
96 | return 1; | |
97 | ||
98 | err: | |
2ace7450 | 99 | ASN1_INTEGER_free(public_key); |
d6407083 | 100 | DH_free(dh); |
0f113f3e | 101 | return 0; |
4c97a04e | 102 | |
0f113f3e | 103 | } |
4c97a04e | 104 | |
0f113f3e MC |
105 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
106 | { | |
107 | DH *dh; | |
0f113f3e MC |
108 | int ptype; |
109 | unsigned char *penc = NULL; | |
110 | int penclen; | |
111 | ASN1_STRING *str; | |
112 | ASN1_INTEGER *pub_key = NULL; | |
113 | ||
114 | dh = pkey->pkey.dh; | |
115 | ||
116 | str = ASN1_STRING_new(); | |
90945fa3 | 117 | if (str == NULL) { |
6aa8dab2 MC |
118 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
119 | goto err; | |
120 | } | |
0f113f3e MC |
121 | str->length = i2d_dhp(pkey, dh, &str->data); |
122 | if (str->length <= 0) { | |
123 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
124 | goto err; | |
125 | } | |
0f113f3e MC |
126 | ptype = V_ASN1_SEQUENCE; |
127 | ||
128 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
12a765a5 | 129 | if (pub_key == NULL) |
0f113f3e MC |
130 | goto err; |
131 | ||
132 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
133 | ||
134 | ASN1_INTEGER_free(pub_key); | |
135 | ||
136 | if (penclen <= 0) { | |
137 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
138 | goto err; | |
139 | } | |
140 | ||
141 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 142 | ptype, str, penc, penclen)) |
0f113f3e MC |
143 | return 1; |
144 | ||
145 | err: | |
b548a1f1 | 146 | OPENSSL_free(penc); |
0dfb9398 | 147 | ASN1_STRING_free(str); |
0f113f3e MC |
148 | |
149 | return 0; | |
150 | } | |
4c97a04e | 151 | |
0f113f3e MC |
152 | /* |
153 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
154 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 155 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 156 | */ |
4c97a04e | 157 | |
245c6bc3 | 158 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
159 | { |
160 | const unsigned char *p, *pm; | |
161 | int pklen, pmlen; | |
162 | int ptype; | |
ac4e2577 DSH |
163 | const void *pval; |
164 | const ASN1_STRING *pstr; | |
245c6bc3 | 165 | const X509_ALGOR *palg; |
0f113f3e | 166 | ASN1_INTEGER *privkey = NULL; |
0f113f3e MC |
167 | DH *dh = NULL; |
168 | ||
169 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
170 | return 0; | |
171 | ||
172 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
173 | ||
174 | if (ptype != V_ASN1_SEQUENCE) | |
175 | goto decerr; | |
75ebbd9a | 176 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
177 | goto decerr; |
178 | ||
179 | pstr = pval; | |
180 | pm = pstr->data; | |
181 | pmlen = pstr->length; | |
75ebbd9a | 182 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 183 | goto decerr; |
75ebbd9a | 184 | |
0f113f3e | 185 | /* We have parameters now set private key */ |
74924dcb RS |
186 | if ((dh->priv_key = BN_secure_new()) == NULL |
187 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
188 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
189 | goto dherr; | |
190 | } | |
8b84b075 | 191 | /* Calculate public key, increments dirty_cnt */ |
0f113f3e MC |
192 | if (!DH_generate_key(dh)) |
193 | goto dherr; | |
194 | ||
195 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
196 | ||
a8ae0891 | 197 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
198 | |
199 | return 1; | |
200 | ||
201 | decerr: | |
202 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
203 | dherr: | |
204 | DH_free(dh); | |
a8ae0891 | 205 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
206 | return 0; |
207 | } | |
4c97a04e DSH |
208 | |
209 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
210 | { | |
0f113f3e MC |
211 | ASN1_STRING *params = NULL; |
212 | ASN1_INTEGER *prkey = NULL; | |
213 | unsigned char *dp = NULL; | |
214 | int dplen; | |
215 | ||
216 | params = ASN1_STRING_new(); | |
217 | ||
90945fa3 | 218 | if (params == NULL) { |
0f113f3e MC |
219 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
220 | goto err; | |
221 | } | |
222 | ||
223 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
224 | if (params->length <= 0) { | |
225 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
226 | goto err; | |
227 | } | |
228 | params->type = V_ASN1_SEQUENCE; | |
229 | ||
230 | /* Get private key into integer */ | |
231 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
232 | ||
12a765a5 | 233 | if (prkey == NULL) { |
0f113f3e MC |
234 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); |
235 | goto err; | |
236 | } | |
237 | ||
238 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
239 | ||
a8ae0891 | 240 | ASN1_STRING_clear_free(prkey); |
1549a265 | 241 | prkey = NULL; |
0f113f3e MC |
242 | |
243 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
244 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
245 | goto err; | |
246 | ||
247 | return 1; | |
248 | ||
249 | err: | |
b548a1f1 | 250 | OPENSSL_free(dp); |
0dfb9398 | 251 | ASN1_STRING_free(params); |
2ace7450 | 252 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 253 | return 0; |
4c97a04e DSH |
254 | } |
255 | ||
3e4585c8 | 256 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
257 | const unsigned char **pder, int derlen) |
258 | { | |
259 | DH *dh; | |
75ebbd9a RS |
260 | |
261 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
262 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
263 | return 0; | |
264 | } | |
8b84b075 | 265 | dh->dirty_cnt++; |
0f113f3e MC |
266 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); |
267 | return 1; | |
268 | } | |
3e4585c8 DSH |
269 | |
270 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
271 | { |
272 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
273 | } | |
3e4585c8 | 274 | |
a773b52a | 275 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 276 | { |
66696478 | 277 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 278 | const char *ktype = NULL; |
0f113f3e MC |
279 | BIGNUM *priv_key, *pub_key; |
280 | ||
281 | if (ptype == 2) | |
282 | priv_key = x->priv_key; | |
283 | else | |
284 | priv_key = NULL; | |
285 | ||
286 | if (ptype > 0) | |
287 | pub_key = x->pub_key; | |
288 | else | |
289 | pub_key = NULL; | |
290 | ||
dc8de3e6 | 291 | if (x->params.p == NULL || (ptype == 2 && priv_key == NULL) |
1d54ef34 | 292 | || (ptype > 0 && pub_key == NULL)) { |
0f113f3e MC |
293 | reason = ERR_R_PASSED_NULL_PARAMETER; |
294 | goto err; | |
295 | } | |
296 | ||
0f113f3e MC |
297 | if (ptype == 2) |
298 | ktype = "DH Private-Key"; | |
299 | else if (ptype == 1) | |
300 | ktype = "DH Public-Key"; | |
301 | else | |
302 | ktype = "DH Parameters"; | |
303 | ||
756f5c6c | 304 | if (!BIO_indent(bp, indent, 128) |
dc8de3e6 | 305 | || BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0) |
0f113f3e MC |
306 | goto err; |
307 | indent += 4; | |
308 | ||
a773b52a | 309 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 310 | goto err; |
a773b52a | 311 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
312 | goto err; |
313 | ||
dc8de3e6 | 314 | if (!ffc_params_print(bp, &x->params, indent)) |
0f113f3e | 315 | goto err; |
756f5c6c | 316 | |
0f113f3e | 317 | if (x->length != 0) { |
756f5c6c P |
318 | if (!BIO_indent(bp, indent, 128) |
319 | || BIO_printf(bp, "recommended-private-length: %d bits\n", | |
320 | (int)x->length) <= 0) | |
0f113f3e MC |
321 | goto err; |
322 | } | |
323 | ||
66696478 RS |
324 | return 1; |
325 | ||
0f113f3e | 326 | err: |
66696478 | 327 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 328 | return 0; |
0f113f3e | 329 | } |
3e4585c8 | 330 | |
ceb46789 | 331 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e | 332 | { |
26a7d938 | 333 | return DH_size(pkey->pkey.dh); |
0f113f3e | 334 | } |
ceb46789 DSH |
335 | |
336 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e | 337 | { |
dc8de3e6 | 338 | return DH_bits(pkey->pkey.dh); |
0f113f3e | 339 | } |
ceb46789 | 340 | |
2514fa79 | 341 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
342 | { |
343 | return DH_security_bits(pkey->pkey.dh); | |
344 | } | |
2514fa79 | 345 | |
ffb1ac67 | 346 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e | 347 | { |
dc8de3e6 SL |
348 | return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params, |
349 | a->ameth != &dhx_asn1_meth); | |
0f113f3e | 350 | } |
ceb46789 | 351 | |
d3cc91ee | 352 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
353 | { |
354 | if (is_x942 == -1) | |
dc8de3e6 SL |
355 | is_x942 = (from->params.q != NULL); |
356 | if (!ffc_params_copy(&to->params, &from->params)) | |
0f113f3e | 357 | return 0; |
dc8de3e6 | 358 | if (!is_x942) |
0f113f3e | 359 | to->length = from->length; |
8b84b075 | 360 | to->dirty_cnt++; |
0f113f3e MC |
361 | return 1; |
362 | } | |
d3cc91ee | 363 | |
9fdcc21f | 364 | DH *DHparams_dup(const DH *dh) |
0f113f3e MC |
365 | { |
366 | DH *ret; | |
367 | ret = DH_new(); | |
90945fa3 | 368 | if (ret == NULL) |
0f113f3e MC |
369 | return NULL; |
370 | if (!int_dh_param_copy(ret, dh, -1)) { | |
371 | DH_free(ret); | |
372 | return NULL; | |
373 | } | |
374 | return ret; | |
375 | } | |
d3cc91ee DSH |
376 | |
377 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 378 | { |
2986ecdc DSH |
379 | if (to->pkey.dh == NULL) { |
380 | to->pkey.dh = DH_new(); | |
381 | if (to->pkey.dh == NULL) | |
382 | return 0; | |
383 | } | |
0f113f3e MC |
384 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
385 | from->ameth == &dhx_asn1_meth); | |
386 | } | |
d3cc91ee | 387 | |
ffb1ac67 | 388 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e | 389 | { |
dc8de3e6 SL |
390 | return a->pkey.dh == NULL |
391 | || a->pkey.dh->params.p == NULL | |
392 | || a->pkey.dh->params.g == NULL; | |
0f113f3e | 393 | } |
ceb46789 DSH |
394 | |
395 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
396 | { |
397 | if (dh_cmp_parameters(a, b) == 0) | |
398 | return 0; | |
399 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
400 | return 0; | |
401 | else | |
402 | return 1; | |
403 | } | |
ceb46789 | 404 | |
3e4585c8 | 405 | static int dh_param_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, 0); |
0f113f3e | 409 | } |
ceb46789 DSH |
410 | |
411 | static int dh_public_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, 1); |
0f113f3e | 415 | } |
ceb46789 DSH |
416 | |
417 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
418 | ASN1_PCTX *ctx) |
419 | { | |
a773b52a | 420 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 421 | } |
3e4585c8 DSH |
422 | |
423 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 424 | { |
a773b52a | 425 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 426 | } |
3e4585c8 | 427 | |
bd59f2b9 DSH |
428 | #ifndef OPENSSL_NO_CMS |
429 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
430 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
431 | #endif | |
432 | ||
433 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
9aaecbfc | 434 | { |
435 | switch (op) { | |
436 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: | |
437 | return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1); | |
438 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
439 | return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2); | |
440 | default: | |
441 | return -2; | |
442 | } | |
443 | } | |
444 | ||
445 | static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
446 | { |
447 | switch (op) { | |
bd59f2b9 DSH |
448 | #ifndef OPENSSL_NO_CMS |
449 | ||
0f113f3e MC |
450 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
451 | if (arg1 == 1) | |
452 | return dh_cms_decrypt(arg2); | |
453 | else if (arg1 == 0) | |
454 | return dh_cms_encrypt(arg2); | |
455 | return -2; | |
bd59f2b9 | 456 | |
0f113f3e MC |
457 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
458 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
459 | return 1; | |
bd59f2b9 | 460 | #endif |
0f113f3e MC |
461 | default: |
462 | return -2; | |
463 | } | |
464 | ||
465 | } | |
466 | ||
b0004708 PY |
467 | static int dh_pkey_public_check(const EVP_PKEY *pkey) |
468 | { | |
469 | DH *dh = pkey->pkey.dh; | |
470 | ||
471 | if (dh->pub_key == NULL) { | |
472 | DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | return DH_check_pub_key_ex(dh, dh->pub_key); | |
477 | } | |
478 | ||
479 | static int dh_pkey_param_check(const EVP_PKEY *pkey) | |
480 | { | |
481 | DH *dh = pkey->pkey.dh; | |
482 | ||
483 | return DH_check_ex(dh); | |
484 | } | |
485 | ||
8b84b075 RL |
486 | static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey) |
487 | { | |
488 | return pkey->pkey.dh->dirty_cnt; | |
489 | } | |
490 | ||
b305452f RL |
491 | static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata, |
492 | EVP_KEYMGMT *to_keymgmt) | |
8b84b075 | 493 | { |
b305452f | 494 | DH *dh = from->pkey.dh; |
8b84b075 RL |
495 | OSSL_PARAM_BLD tmpl; |
496 | const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh); | |
497 | const BIGNUM *pub_key = DH_get0_pub_key(dh); | |
498 | const BIGNUM *priv_key = DH_get0_priv_key(dh); | |
499 | OSSL_PARAM *params; | |
b305452f | 500 | int rv; |
8b84b075 | 501 | |
21fb7067 | 502 | if (p == NULL || g == NULL) |
b305452f | 503 | return 0; |
8b84b075 RL |
504 | |
505 | ossl_param_bld_init(&tmpl); | |
4889dadc | 506 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_P, p) |
21fb7067 | 507 | || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_G, g)) |
b305452f | 508 | return 0; |
8b84b075 | 509 | if (q != NULL) { |
4889dadc | 510 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_Q, q)) |
b305452f | 511 | return 0; |
8b84b075 | 512 | } |
b305452f | 513 | /* A key must at least have a public part. */ |
90d3cb57 | 514 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key)) |
b305452f RL |
515 | return 0; |
516 | if (priv_key != NULL) { | |
90d3cb57 | 517 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PRIV_KEY, |
b305452f RL |
518 | priv_key)) |
519 | return 0; | |
8b84b075 RL |
520 | } |
521 | ||
b305452f RL |
522 | if ((params = ossl_param_bld_to_param(&tmpl)) == NULL) |
523 | return 0; | |
8b84b075 RL |
524 | |
525 | /* We export, the provider imports */ | |
b305452f RL |
526 | rv = evp_keymgmt_import(to_keymgmt, to_keydata, OSSL_KEYMGMT_SELECT_ALL, |
527 | params); | |
8b84b075 RL |
528 | |
529 | ossl_param_bld_free(params); | |
b305452f RL |
530 | |
531 | return rv; | |
8b84b075 RL |
532 | } |
533 | ||
0f113f3e MC |
534 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { |
535 | EVP_PKEY_DH, | |
536 | EVP_PKEY_DH, | |
537 | 0, | |
538 | ||
539 | "DH", | |
540 | "OpenSSL PKCS#3 DH method", | |
541 | ||
542 | dh_pub_decode, | |
543 | dh_pub_encode, | |
544 | dh_pub_cmp, | |
545 | dh_public_print, | |
546 | ||
547 | dh_priv_decode, | |
548 | dh_priv_encode, | |
549 | dh_private_print, | |
550 | ||
551 | int_dh_size, | |
552 | dh_bits, | |
553 | dh_security_bits, | |
554 | ||
555 | dh_param_decode, | |
556 | dh_param_encode, | |
557 | dh_missing_parameters, | |
558 | dh_copy_parameters, | |
559 | dh_cmp_parameters, | |
560 | dh_param_print, | |
561 | 0, | |
562 | ||
563 | int_dh_free, | |
9aaecbfc | 564 | dh_pkey_ctrl, |
b0004708 PY |
565 | |
566 | 0, 0, 0, 0, 0, | |
567 | ||
568 | 0, | |
569 | dh_pkey_public_check, | |
8b84b075 RL |
570 | dh_pkey_param_check, |
571 | ||
572 | 0, 0, 0, 0, | |
573 | ||
574 | dh_pkey_dirty_cnt, | |
575 | dh_pkey_export_to, | |
0f113f3e MC |
576 | }; |
577 | ||
578 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
579 | EVP_PKEY_DHX, | |
580 | EVP_PKEY_DHX, | |
581 | 0, | |
582 | ||
583 | "X9.42 DH", | |
584 | "OpenSSL X9.42 DH method", | |
585 | ||
586 | dh_pub_decode, | |
587 | dh_pub_encode, | |
588 | dh_pub_cmp, | |
589 | dh_public_print, | |
590 | ||
591 | dh_priv_decode, | |
592 | dh_priv_encode, | |
593 | dh_private_print, | |
594 | ||
595 | int_dh_size, | |
596 | dh_bits, | |
597 | dh_security_bits, | |
598 | ||
599 | dh_param_decode, | |
600 | dh_param_encode, | |
601 | dh_missing_parameters, | |
602 | dh_copy_parameters, | |
603 | dh_cmp_parameters, | |
604 | dh_param_print, | |
605 | 0, | |
606 | ||
607 | int_dh_free, | |
9aaecbfc | 608 | dhx_pkey_ctrl, |
b0004708 PY |
609 | |
610 | 0, 0, 0, 0, 0, | |
611 | ||
612 | 0, | |
613 | dh_pkey_public_check, | |
614 | dh_pkey_param_check | |
0f113f3e MC |
615 | }; |
616 | ||
bd59f2b9 DSH |
617 | #ifndef OPENSSL_NO_CMS |
618 | ||
619 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
620 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
621 | { | |
ac4e2577 | 622 | const ASN1_OBJECT *aoid; |
0f113f3e | 623 | int atype; |
ac4e2577 | 624 | const void *aval; |
0f113f3e MC |
625 | ASN1_INTEGER *public_key = NULL; |
626 | int rv = 0; | |
627 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
628 | DH *dhpeer = NULL; | |
629 | const unsigned char *p; | |
630 | int plen; | |
631 | ||
632 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
633 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
634 | goto err; | |
635 | /* Only absent parameters allowed in RFC XXXX */ | |
636 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
637 | goto err; | |
638 | ||
639 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
12a765a5 | 640 | if (pk == NULL) |
0f113f3e MC |
641 | goto err; |
642 | if (pk->type != EVP_PKEY_DHX) | |
643 | goto err; | |
644 | /* Get parameters from parent key */ | |
645 | dhpeer = DHparams_dup(pk->pkey.dh); | |
646 | /* We have parameters now set public key */ | |
647 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 648 | p = ASN1_STRING_get0_data(pubkey); |
12a765a5 | 649 | if (p == NULL || plen == 0) |
0f113f3e MC |
650 | goto err; |
651 | ||
75ebbd9a | 652 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
653 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
654 | goto err; | |
655 | } | |
656 | ||
657 | /* We have parameters now set public key */ | |
75ebbd9a | 658 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
659 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
660 | goto err; | |
661 | } | |
662 | ||
663 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 664 | if (pkpeer == NULL) |
0f113f3e MC |
665 | goto err; |
666 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
667 | dhpeer = NULL; | |
668 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
669 | rv = 1; | |
670 | err: | |
2ace7450 | 671 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 672 | EVP_PKEY_free(pkpeer); |
d6407083 | 673 | DH_free(dhpeer); |
0f113f3e MC |
674 | return rv; |
675 | } | |
bd59f2b9 DSH |
676 | |
677 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
678 | { |
679 | int rv = 0; | |
680 | ||
681 | X509_ALGOR *alg, *kekalg = NULL; | |
682 | ASN1_OCTET_STRING *ukm; | |
683 | const unsigned char *p; | |
684 | unsigned char *dukm = NULL; | |
685 | size_t dukmlen = 0; | |
686 | int keylen, plen; | |
687 | const EVP_CIPHER *kekcipher; | |
688 | EVP_CIPHER_CTX *kekctx; | |
689 | ||
690 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
691 | goto err; | |
692 | ||
693 | /* | |
694 | * For DH we only have one OID permissible. If ever any more get defined | |
695 | * we will need something cleverer. | |
696 | */ | |
697 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
698 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
699 | goto err; | |
700 | } | |
701 | ||
702 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
703 | goto err; | |
704 | ||
705 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
706 | goto err; | |
707 | ||
708 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
709 | goto err; | |
710 | ||
711 | p = alg->parameter->value.sequence->data; | |
712 | plen = alg->parameter->value.sequence->length; | |
713 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
714 | if (!kekalg) | |
715 | goto err; | |
716 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
717 | if (!kekctx) | |
718 | goto err; | |
719 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
720 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
721 | goto err; | |
722 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
723 | goto err; | |
724 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
725 | goto err; | |
726 | ||
727 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
728 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
729 | goto err; | |
730 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
731 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
732 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
733 | <= 0) | |
734 | goto err; | |
735 | ||
736 | if (ukm) { | |
737 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 738 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
739 | if (!dukm) |
740 | goto err; | |
741 | } | |
742 | ||
743 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
744 | goto err; | |
745 | dukm = NULL; | |
746 | ||
747 | rv = 1; | |
748 | err: | |
222561fe RS |
749 | X509_ALGOR_free(kekalg); |
750 | OPENSSL_free(dukm); | |
0f113f3e MC |
751 | return rv; |
752 | } | |
bd59f2b9 DSH |
753 | |
754 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
755 | { |
756 | EVP_PKEY_CTX *pctx; | |
dc8de3e6 | 757 | |
0f113f3e | 758 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 RS |
759 | |
760 | if (pctx == NULL) | |
0f113f3e MC |
761 | return 0; |
762 | /* See if we need to set peer key */ | |
763 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
764 | X509_ALGOR *alg; | |
765 | ASN1_BIT_STRING *pubkey; | |
766 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
767 | NULL, NULL, NULL)) | |
768 | return 0; | |
769 | if (!alg || !pubkey) | |
770 | return 0; | |
771 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
772 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
773 | return 0; | |
774 | } | |
775 | } | |
776 | /* Set DH derivation parameters and initialise unwrap context */ | |
777 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
778 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
779 | return 0; | |
780 | } | |
781 | return 1; | |
782 | } | |
bd59f2b9 DSH |
783 | |
784 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
785 | { |
786 | EVP_PKEY_CTX *pctx; | |
787 | EVP_PKEY *pkey; | |
788 | EVP_CIPHER_CTX *ctx; | |
789 | int keylen; | |
790 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 791 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
792 | ASN1_BIT_STRING *pubkey; |
793 | ASN1_STRING *wrap_str; | |
794 | ASN1_OCTET_STRING *ukm; | |
795 | unsigned char *penc = NULL, *dukm = NULL; | |
796 | int penclen; | |
797 | size_t dukmlen = 0; | |
798 | int rv = 0; | |
799 | int kdf_type, wrap_nid; | |
800 | const EVP_MD *kdf_md; | |
12a765a5 | 801 | |
0f113f3e | 802 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 | 803 | if (pctx == NULL) |
0f113f3e MC |
804 | return 0; |
805 | /* Get ephemeral key */ | |
806 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
807 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
808 | NULL, NULL, NULL)) | |
809 | goto err; | |
810 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
811 | /* Is everything uninitialised? */ | |
812 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 813 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
12a765a5 RS |
814 | |
815 | if (pubk == NULL) | |
0f113f3e MC |
816 | goto err; |
817 | /* Set the key */ | |
818 | ||
819 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
820 | ASN1_INTEGER_free(pubk); | |
821 | if (penclen <= 0) | |
822 | goto err; | |
823 | ASN1_STRING_set0(pubkey, penc, penclen); | |
824 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
825 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
826 | ||
827 | penc = NULL; | |
828 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
829 | V_ASN1_UNDEF, NULL); | |
830 | } | |
831 | ||
0d4fb843 | 832 | /* See if custom parameters set */ |
0f113f3e MC |
833 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
834 | if (kdf_type <= 0) | |
835 | goto err; | |
836 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
837 | goto err; | |
838 | ||
839 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
840 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
841 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
842 | goto err; | |
843 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
844 | /* Unknown KDF */ | |
845 | goto err; | |
846 | if (kdf_md == NULL) { | |
847 | /* Only SHA1 supported */ | |
848 | kdf_md = EVP_sha1(); | |
849 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
850 | goto err; | |
851 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
852 | /* Unsupported digest */ | |
853 | goto err; | |
854 | ||
855 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
856 | goto err; | |
857 | ||
858 | /* Get wrap NID */ | |
859 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
860 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
861 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
862 | goto err; | |
863 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
864 | ||
865 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
866 | ||
867 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 868 | if (wrap_alg == NULL) |
0f113f3e MC |
869 | goto err; |
870 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
871 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 872 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
873 | goto err; |
874 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
875 | goto err; | |
876 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
877 | ASN1_TYPE_free(wrap_alg->parameter); | |
878 | wrap_alg->parameter = NULL; | |
879 | } | |
880 | ||
881 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
882 | goto err; | |
883 | ||
884 | if (ukm) { | |
885 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 886 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
887 | if (!dukm) |
888 | goto err; | |
889 | } | |
890 | ||
891 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
892 | goto err; | |
893 | dukm = NULL; | |
894 | ||
895 | /* | |
896 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
897 | * of another AlgorithmIdentifier. | |
898 | */ | |
899 | penc = NULL; | |
900 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
12a765a5 | 901 | if (penc == NULL || penclen == 0) |
0f113f3e MC |
902 | goto err; |
903 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 904 | if (wrap_str == NULL) |
0f113f3e MC |
905 | goto err; |
906 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
907 | penc = NULL; | |
908 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
909 | V_ASN1_SEQUENCE, wrap_str); | |
910 | ||
911 | rv = 1; | |
912 | ||
913 | err: | |
222561fe RS |
914 | OPENSSL_free(penc); |
915 | X509_ALGOR_free(wrap_alg); | |
6624e1f7 | 916 | OPENSSL_free(dukm); |
0f113f3e MC |
917 | return rv; |
918 | } | |
bd59f2b9 DSH |
919 | |
920 | #endif |