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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 | 22 | #include "crypto/asn1.h" |
df13defd | 23 | #include "crypto/dh.h" |
25f2138b | 24 | #include "crypto/evp.h" |
3c27208f | 25 | #include <openssl/cms.h> |
8b84b075 RL |
26 | #include <openssl/core_names.h> |
27 | #include "internal/param_build.h" | |
adbc603d | 28 | |
0f113f3e MC |
29 | /* |
30 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
31 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
32 | */ |
33 | ||
0f113f3e MC |
34 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
35 | long length) | |
36 | { | |
37 | if (pkey->ameth == &dhx_asn1_meth) | |
38 | return d2i_DHxparams(NULL, pp, length); | |
39 | return d2i_DHparams(NULL, pp, length); | |
40 | } | |
afb14cda DSH |
41 | |
42 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
43 | { |
44 | if (pkey->ameth == &dhx_asn1_meth) | |
45 | return i2d_DHxparams(a, pp); | |
46 | return i2d_DHparams(a, pp); | |
47 | } | |
afb14cda | 48 | |
adbc603d | 49 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
50 | { |
51 | DH_free(pkey->pkey.dh); | |
52 | } | |
adbc603d | 53 | |
ceb46789 | 54 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
55 | { |
56 | const unsigned char *p, *pm; | |
57 | int pklen, pmlen; | |
58 | int ptype; | |
ac4e2577 DSH |
59 | const void *pval; |
60 | const ASN1_STRING *pstr; | |
0f113f3e MC |
61 | X509_ALGOR *palg; |
62 | ASN1_INTEGER *public_key = NULL; | |
63 | ||
64 | DH *dh = NULL; | |
65 | ||
66 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
67 | return 0; | |
68 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
69 | ||
70 | if (ptype != V_ASN1_SEQUENCE) { | |
71 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
72 | goto err; | |
73 | } | |
74 | ||
75 | pstr = pval; | |
76 | pm = pstr->data; | |
77 | pmlen = pstr->length; | |
78 | ||
75ebbd9a | 79 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
80 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
81 | goto err; | |
82 | } | |
83 | ||
75ebbd9a | 84 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
85 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
86 | goto err; | |
87 | } | |
88 | ||
89 | /* We have parameters now set public key */ | |
75ebbd9a | 90 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
91 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
92 | goto err; | |
93 | } | |
94 | ||
95 | ASN1_INTEGER_free(public_key); | |
96 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
97 | return 1; | |
98 | ||
99 | err: | |
2ace7450 | 100 | ASN1_INTEGER_free(public_key); |
d6407083 | 101 | DH_free(dh); |
0f113f3e | 102 | return 0; |
4c97a04e | 103 | |
0f113f3e | 104 | } |
4c97a04e | 105 | |
0f113f3e MC |
106 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
107 | { | |
108 | DH *dh; | |
0f113f3e MC |
109 | int ptype; |
110 | unsigned char *penc = NULL; | |
111 | int penclen; | |
112 | ASN1_STRING *str; | |
113 | ASN1_INTEGER *pub_key = NULL; | |
114 | ||
115 | dh = pkey->pkey.dh; | |
116 | ||
117 | str = ASN1_STRING_new(); | |
90945fa3 | 118 | if (str == NULL) { |
6aa8dab2 MC |
119 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
120 | goto err; | |
121 | } | |
0f113f3e MC |
122 | str->length = i2d_dhp(pkey, dh, &str->data); |
123 | if (str->length <= 0) { | |
124 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
125 | goto err; | |
126 | } | |
0f113f3e MC |
127 | ptype = V_ASN1_SEQUENCE; |
128 | ||
129 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
12a765a5 | 130 | if (pub_key == NULL) |
0f113f3e MC |
131 | goto err; |
132 | ||
133 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
134 | ||
135 | ASN1_INTEGER_free(pub_key); | |
136 | ||
137 | if (penclen <= 0) { | |
138 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
139 | goto err; | |
140 | } | |
141 | ||
142 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 143 | ptype, str, penc, penclen)) |
0f113f3e MC |
144 | return 1; |
145 | ||
146 | err: | |
b548a1f1 | 147 | OPENSSL_free(penc); |
0dfb9398 | 148 | ASN1_STRING_free(str); |
0f113f3e MC |
149 | |
150 | return 0; | |
151 | } | |
4c97a04e | 152 | |
0f113f3e MC |
153 | /* |
154 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
155 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 156 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 157 | */ |
4c97a04e | 158 | |
245c6bc3 | 159 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
160 | { |
161 | const unsigned char *p, *pm; | |
162 | int pklen, pmlen; | |
163 | int ptype; | |
ac4e2577 DSH |
164 | const void *pval; |
165 | const ASN1_STRING *pstr; | |
245c6bc3 | 166 | const X509_ALGOR *palg; |
0f113f3e | 167 | ASN1_INTEGER *privkey = NULL; |
0f113f3e MC |
168 | DH *dh = NULL; |
169 | ||
170 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
171 | return 0; | |
172 | ||
173 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
174 | ||
175 | if (ptype != V_ASN1_SEQUENCE) | |
176 | goto decerr; | |
75ebbd9a | 177 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
178 | goto decerr; |
179 | ||
180 | pstr = pval; | |
181 | pm = pstr->data; | |
182 | pmlen = pstr->length; | |
75ebbd9a | 183 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 184 | goto decerr; |
75ebbd9a | 185 | |
0f113f3e | 186 | /* We have parameters now set private key */ |
74924dcb RS |
187 | if ((dh->priv_key = BN_secure_new()) == NULL |
188 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
189 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
190 | goto dherr; | |
191 | } | |
8b84b075 | 192 | /* Calculate public key, increments dirty_cnt */ |
0f113f3e MC |
193 | if (!DH_generate_key(dh)) |
194 | goto dherr; | |
195 | ||
196 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
197 | ||
a8ae0891 | 198 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
199 | |
200 | return 1; | |
201 | ||
202 | decerr: | |
203 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
204 | dherr: | |
205 | DH_free(dh); | |
a8ae0891 | 206 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
207 | return 0; |
208 | } | |
4c97a04e DSH |
209 | |
210 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
211 | { | |
0f113f3e MC |
212 | ASN1_STRING *params = NULL; |
213 | ASN1_INTEGER *prkey = NULL; | |
214 | unsigned char *dp = NULL; | |
215 | int dplen; | |
216 | ||
217 | params = ASN1_STRING_new(); | |
218 | ||
90945fa3 | 219 | if (params == NULL) { |
0f113f3e MC |
220 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
221 | goto err; | |
222 | } | |
223 | ||
224 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
225 | if (params->length <= 0) { | |
226 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
227 | goto err; | |
228 | } | |
229 | params->type = V_ASN1_SEQUENCE; | |
230 | ||
231 | /* Get private key into integer */ | |
232 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
233 | ||
12a765a5 | 234 | if (prkey == NULL) { |
0f113f3e MC |
235 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); |
236 | goto err; | |
237 | } | |
238 | ||
239 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
240 | ||
a8ae0891 | 241 | ASN1_STRING_clear_free(prkey); |
1549a265 | 242 | prkey = NULL; |
0f113f3e MC |
243 | |
244 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
245 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
246 | goto err; | |
247 | ||
248 | return 1; | |
249 | ||
250 | err: | |
b548a1f1 | 251 | OPENSSL_free(dp); |
0dfb9398 | 252 | ASN1_STRING_free(params); |
2ace7450 | 253 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 254 | return 0; |
4c97a04e DSH |
255 | } |
256 | ||
3e4585c8 | 257 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
258 | const unsigned char **pder, int derlen) |
259 | { | |
260 | DH *dh; | |
75ebbd9a RS |
261 | |
262 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
263 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
264 | return 0; | |
265 | } | |
8b84b075 | 266 | dh->dirty_cnt++; |
0f113f3e MC |
267 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); |
268 | return 1; | |
269 | } | |
3e4585c8 DSH |
270 | |
271 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
272 | { |
273 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
274 | } | |
3e4585c8 | 275 | |
a773b52a | 276 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 277 | { |
66696478 | 278 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 279 | const char *ktype = NULL; |
0f113f3e MC |
280 | BIGNUM *priv_key, *pub_key; |
281 | ||
282 | if (ptype == 2) | |
283 | priv_key = x->priv_key; | |
284 | else | |
285 | priv_key = NULL; | |
286 | ||
287 | if (ptype > 0) | |
288 | pub_key = x->pub_key; | |
289 | else | |
290 | pub_key = NULL; | |
291 | ||
dc8de3e6 | 292 | if (x->params.p == NULL || (ptype == 2 && priv_key == NULL) |
1d54ef34 | 293 | || (ptype > 0 && pub_key == NULL)) { |
0f113f3e MC |
294 | reason = ERR_R_PASSED_NULL_PARAMETER; |
295 | goto err; | |
296 | } | |
297 | ||
0f113f3e MC |
298 | if (ptype == 2) |
299 | ktype = "DH Private-Key"; | |
300 | else if (ptype == 1) | |
301 | ktype = "DH Public-Key"; | |
302 | else | |
303 | ktype = "DH Parameters"; | |
304 | ||
756f5c6c | 305 | if (!BIO_indent(bp, indent, 128) |
dc8de3e6 | 306 | || BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0) |
0f113f3e MC |
307 | goto err; |
308 | indent += 4; | |
309 | ||
a773b52a | 310 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 311 | goto err; |
a773b52a | 312 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
313 | goto err; |
314 | ||
dc8de3e6 | 315 | if (!ffc_params_print(bp, &x->params, indent)) |
0f113f3e | 316 | goto err; |
756f5c6c | 317 | |
0f113f3e | 318 | if (x->length != 0) { |
756f5c6c P |
319 | if (!BIO_indent(bp, indent, 128) |
320 | || BIO_printf(bp, "recommended-private-length: %d bits\n", | |
321 | (int)x->length) <= 0) | |
0f113f3e MC |
322 | goto err; |
323 | } | |
324 | ||
66696478 RS |
325 | return 1; |
326 | ||
0f113f3e | 327 | err: |
66696478 | 328 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 329 | return 0; |
0f113f3e | 330 | } |
3e4585c8 | 331 | |
ceb46789 | 332 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e | 333 | { |
26a7d938 | 334 | return DH_size(pkey->pkey.dh); |
0f113f3e | 335 | } |
ceb46789 DSH |
336 | |
337 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e | 338 | { |
dc8de3e6 | 339 | return DH_bits(pkey->pkey.dh); |
0f113f3e | 340 | } |
ceb46789 | 341 | |
2514fa79 | 342 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
343 | { |
344 | return DH_security_bits(pkey->pkey.dh); | |
345 | } | |
2514fa79 | 346 | |
ffb1ac67 | 347 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e | 348 | { |
dc8de3e6 SL |
349 | return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params, |
350 | a->ameth != &dhx_asn1_meth); | |
0f113f3e | 351 | } |
ceb46789 | 352 | |
d3cc91ee | 353 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
354 | { |
355 | if (is_x942 == -1) | |
dc8de3e6 SL |
356 | is_x942 = (from->params.q != NULL); |
357 | if (!ffc_params_copy(&to->params, &from->params)) | |
0f113f3e | 358 | return 0; |
dc8de3e6 | 359 | if (!is_x942) |
0f113f3e | 360 | to->length = from->length; |
8b84b075 | 361 | to->dirty_cnt++; |
0f113f3e MC |
362 | return 1; |
363 | } | |
d3cc91ee | 364 | |
9fdcc21f | 365 | DH *DHparams_dup(const DH *dh) |
0f113f3e MC |
366 | { |
367 | DH *ret; | |
368 | ret = DH_new(); | |
90945fa3 | 369 | if (ret == NULL) |
0f113f3e MC |
370 | return NULL; |
371 | if (!int_dh_param_copy(ret, dh, -1)) { | |
372 | DH_free(ret); | |
373 | return NULL; | |
374 | } | |
375 | return ret; | |
376 | } | |
d3cc91ee DSH |
377 | |
378 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 379 | { |
2986ecdc DSH |
380 | if (to->pkey.dh == NULL) { |
381 | to->pkey.dh = DH_new(); | |
382 | if (to->pkey.dh == NULL) | |
383 | return 0; | |
384 | } | |
0f113f3e MC |
385 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
386 | from->ameth == &dhx_asn1_meth); | |
387 | } | |
d3cc91ee | 388 | |
ffb1ac67 | 389 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e | 390 | { |
dc8de3e6 SL |
391 | return a->pkey.dh == NULL |
392 | || a->pkey.dh->params.p == NULL | |
393 | || a->pkey.dh->params.g == NULL; | |
0f113f3e | 394 | } |
ceb46789 DSH |
395 | |
396 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
397 | { |
398 | if (dh_cmp_parameters(a, b) == 0) | |
399 | return 0; | |
400 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
401 | return 0; | |
402 | else | |
403 | return 1; | |
404 | } | |
ceb46789 | 405 | |
3e4585c8 | 406 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
407 | ASN1_PCTX *ctx) |
408 | { | |
a773b52a | 409 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 410 | } |
ceb46789 DSH |
411 | |
412 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
413 | ASN1_PCTX *ctx) |
414 | { | |
a773b52a | 415 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 416 | } |
ceb46789 DSH |
417 | |
418 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
419 | ASN1_PCTX *ctx) |
420 | { | |
a773b52a | 421 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 422 | } |
3e4585c8 DSH |
423 | |
424 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 425 | { |
a773b52a | 426 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 427 | } |
3e4585c8 | 428 | |
bd59f2b9 DSH |
429 | #ifndef OPENSSL_NO_CMS |
430 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
431 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
432 | #endif | |
433 | ||
434 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
9aaecbfc | 435 | { |
436 | switch (op) { | |
437 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: | |
438 | return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1); | |
439 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
440 | return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2); | |
441 | default: | |
442 | return -2; | |
443 | } | |
444 | } | |
445 | ||
446 | static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
447 | { |
448 | switch (op) { | |
bd59f2b9 DSH |
449 | #ifndef OPENSSL_NO_CMS |
450 | ||
0f113f3e MC |
451 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
452 | if (arg1 == 1) | |
453 | return dh_cms_decrypt(arg2); | |
454 | else if (arg1 == 0) | |
455 | return dh_cms_encrypt(arg2); | |
456 | return -2; | |
bd59f2b9 | 457 | |
0f113f3e MC |
458 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
459 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
460 | return 1; | |
bd59f2b9 | 461 | #endif |
0f113f3e MC |
462 | default: |
463 | return -2; | |
464 | } | |
465 | ||
466 | } | |
467 | ||
b0004708 PY |
468 | static int dh_pkey_public_check(const EVP_PKEY *pkey) |
469 | { | |
470 | DH *dh = pkey->pkey.dh; | |
471 | ||
472 | if (dh->pub_key == NULL) { | |
473 | DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | return DH_check_pub_key_ex(dh, dh->pub_key); | |
478 | } | |
479 | ||
480 | static int dh_pkey_param_check(const EVP_PKEY *pkey) | |
481 | { | |
482 | DH *dh = pkey->pkey.dh; | |
483 | ||
484 | return DH_check_ex(dh); | |
485 | } | |
486 | ||
8b84b075 RL |
487 | static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey) |
488 | { | |
489 | return pkey->pkey.dh->dirty_cnt; | |
490 | } | |
491 | ||
b305452f RL |
492 | static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata, |
493 | EVP_KEYMGMT *to_keymgmt) | |
8b84b075 | 494 | { |
b305452f | 495 | DH *dh = from->pkey.dh; |
8b84b075 RL |
496 | OSSL_PARAM_BLD tmpl; |
497 | const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh); | |
498 | const BIGNUM *pub_key = DH_get0_pub_key(dh); | |
499 | const BIGNUM *priv_key = DH_get0_priv_key(dh); | |
500 | OSSL_PARAM *params; | |
0996cff9 | 501 | int selection = 0; |
b305452f | 502 | int rv; |
8b84b075 | 503 | |
df13defd RL |
504 | /* |
505 | * If the DH method is foreign, then we can't be sure of anything, and | |
506 | * can therefore not export or pretend to export. | |
507 | */ | |
508 | if (dh_get_method(dh) != DH_OpenSSL()) | |
509 | return 0; | |
510 | ||
21fb7067 | 511 | if (p == NULL || g == NULL) |
b305452f | 512 | return 0; |
8b84b075 RL |
513 | |
514 | ossl_param_bld_init(&tmpl); | |
4889dadc | 515 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_P, p) |
21fb7067 | 516 | || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_G, g)) |
b305452f | 517 | return 0; |
8b84b075 | 518 | if (q != NULL) { |
4889dadc | 519 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_FFC_Q, q)) |
b305452f | 520 | return 0; |
8b84b075 | 521 | } |
0996cff9 RL |
522 | selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS; |
523 | if (pub_key != NULL) { | |
524 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key)) | |
525 | return 0; | |
526 | selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY; | |
527 | } | |
b305452f | 528 | if (priv_key != NULL) { |
90d3cb57 | 529 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_PRIV_KEY, |
b305452f RL |
530 | priv_key)) |
531 | return 0; | |
0996cff9 | 532 | selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY; |
8b84b075 RL |
533 | } |
534 | ||
b305452f RL |
535 | if ((params = ossl_param_bld_to_param(&tmpl)) == NULL) |
536 | return 0; | |
8b84b075 RL |
537 | |
538 | /* We export, the provider imports */ | |
0996cff9 | 539 | rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params); |
8b84b075 RL |
540 | |
541 | ossl_param_bld_free(params); | |
b305452f RL |
542 | |
543 | return rv; | |
8b84b075 RL |
544 | } |
545 | ||
0f113f3e MC |
546 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { |
547 | EVP_PKEY_DH, | |
548 | EVP_PKEY_DH, | |
549 | 0, | |
550 | ||
551 | "DH", | |
552 | "OpenSSL PKCS#3 DH method", | |
553 | ||
554 | dh_pub_decode, | |
555 | dh_pub_encode, | |
556 | dh_pub_cmp, | |
557 | dh_public_print, | |
558 | ||
559 | dh_priv_decode, | |
560 | dh_priv_encode, | |
561 | dh_private_print, | |
562 | ||
563 | int_dh_size, | |
564 | dh_bits, | |
565 | dh_security_bits, | |
566 | ||
567 | dh_param_decode, | |
568 | dh_param_encode, | |
569 | dh_missing_parameters, | |
570 | dh_copy_parameters, | |
571 | dh_cmp_parameters, | |
572 | dh_param_print, | |
573 | 0, | |
574 | ||
575 | int_dh_free, | |
9aaecbfc | 576 | dh_pkey_ctrl, |
b0004708 PY |
577 | |
578 | 0, 0, 0, 0, 0, | |
579 | ||
580 | 0, | |
581 | dh_pkey_public_check, | |
8b84b075 RL |
582 | dh_pkey_param_check, |
583 | ||
584 | 0, 0, 0, 0, | |
585 | ||
586 | dh_pkey_dirty_cnt, | |
587 | dh_pkey_export_to, | |
0f113f3e MC |
588 | }; |
589 | ||
590 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
591 | EVP_PKEY_DHX, | |
592 | EVP_PKEY_DHX, | |
593 | 0, | |
594 | ||
595 | "X9.42 DH", | |
596 | "OpenSSL X9.42 DH method", | |
597 | ||
598 | dh_pub_decode, | |
599 | dh_pub_encode, | |
600 | dh_pub_cmp, | |
601 | dh_public_print, | |
602 | ||
603 | dh_priv_decode, | |
604 | dh_priv_encode, | |
605 | dh_private_print, | |
606 | ||
607 | int_dh_size, | |
608 | dh_bits, | |
609 | dh_security_bits, | |
610 | ||
611 | dh_param_decode, | |
612 | dh_param_encode, | |
613 | dh_missing_parameters, | |
614 | dh_copy_parameters, | |
615 | dh_cmp_parameters, | |
616 | dh_param_print, | |
617 | 0, | |
618 | ||
619 | int_dh_free, | |
9aaecbfc | 620 | dhx_pkey_ctrl, |
b0004708 PY |
621 | |
622 | 0, 0, 0, 0, 0, | |
623 | ||
624 | 0, | |
625 | dh_pkey_public_check, | |
626 | dh_pkey_param_check | |
0f113f3e MC |
627 | }; |
628 | ||
bd59f2b9 DSH |
629 | #ifndef OPENSSL_NO_CMS |
630 | ||
631 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
632 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
633 | { | |
ac4e2577 | 634 | const ASN1_OBJECT *aoid; |
0f113f3e | 635 | int atype; |
ac4e2577 | 636 | const void *aval; |
0f113f3e MC |
637 | ASN1_INTEGER *public_key = NULL; |
638 | int rv = 0; | |
639 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
640 | DH *dhpeer = NULL; | |
641 | const unsigned char *p; | |
642 | int plen; | |
643 | ||
644 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
645 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
646 | goto err; | |
647 | /* Only absent parameters allowed in RFC XXXX */ | |
648 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
649 | goto err; | |
650 | ||
651 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
12a765a5 | 652 | if (pk == NULL) |
0f113f3e MC |
653 | goto err; |
654 | if (pk->type != EVP_PKEY_DHX) | |
655 | goto err; | |
656 | /* Get parameters from parent key */ | |
657 | dhpeer = DHparams_dup(pk->pkey.dh); | |
658 | /* We have parameters now set public key */ | |
659 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 660 | p = ASN1_STRING_get0_data(pubkey); |
12a765a5 | 661 | if (p == NULL || plen == 0) |
0f113f3e MC |
662 | goto err; |
663 | ||
75ebbd9a | 664 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
665 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
666 | goto err; | |
667 | } | |
668 | ||
669 | /* We have parameters now set public key */ | |
75ebbd9a | 670 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
671 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
672 | goto err; | |
673 | } | |
674 | ||
675 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 676 | if (pkpeer == NULL) |
0f113f3e MC |
677 | goto err; |
678 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
679 | dhpeer = NULL; | |
680 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
681 | rv = 1; | |
682 | err: | |
2ace7450 | 683 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 684 | EVP_PKEY_free(pkpeer); |
d6407083 | 685 | DH_free(dhpeer); |
0f113f3e MC |
686 | return rv; |
687 | } | |
bd59f2b9 DSH |
688 | |
689 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
690 | { |
691 | int rv = 0; | |
692 | ||
693 | X509_ALGOR *alg, *kekalg = NULL; | |
694 | ASN1_OCTET_STRING *ukm; | |
695 | const unsigned char *p; | |
696 | unsigned char *dukm = NULL; | |
697 | size_t dukmlen = 0; | |
698 | int keylen, plen; | |
699 | const EVP_CIPHER *kekcipher; | |
700 | EVP_CIPHER_CTX *kekctx; | |
701 | ||
702 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
703 | goto err; | |
704 | ||
705 | /* | |
706 | * For DH we only have one OID permissible. If ever any more get defined | |
707 | * we will need something cleverer. | |
708 | */ | |
709 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
710 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
711 | goto err; | |
712 | } | |
713 | ||
714 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
715 | goto err; | |
716 | ||
717 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
718 | goto err; | |
719 | ||
720 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
721 | goto err; | |
722 | ||
723 | p = alg->parameter->value.sequence->data; | |
724 | plen = alg->parameter->value.sequence->length; | |
725 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
726 | if (!kekalg) | |
727 | goto err; | |
728 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
729 | if (!kekctx) | |
730 | goto err; | |
731 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
732 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
733 | goto err; | |
734 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
735 | goto err; | |
736 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
737 | goto err; | |
738 | ||
739 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
740 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
741 | goto err; | |
742 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
743 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
744 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
745 | <= 0) | |
746 | goto err; | |
747 | ||
748 | if (ukm) { | |
749 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 750 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
751 | if (!dukm) |
752 | goto err; | |
753 | } | |
754 | ||
755 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
756 | goto err; | |
757 | dukm = NULL; | |
758 | ||
759 | rv = 1; | |
760 | err: | |
222561fe RS |
761 | X509_ALGOR_free(kekalg); |
762 | OPENSSL_free(dukm); | |
0f113f3e MC |
763 | return rv; |
764 | } | |
bd59f2b9 DSH |
765 | |
766 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
767 | { |
768 | EVP_PKEY_CTX *pctx; | |
dc8de3e6 | 769 | |
0f113f3e | 770 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 RS |
771 | |
772 | if (pctx == NULL) | |
0f113f3e MC |
773 | return 0; |
774 | /* See if we need to set peer key */ | |
775 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
776 | X509_ALGOR *alg; | |
777 | ASN1_BIT_STRING *pubkey; | |
778 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
779 | NULL, NULL, NULL)) | |
780 | return 0; | |
781 | if (!alg || !pubkey) | |
782 | return 0; | |
783 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
784 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
785 | return 0; | |
786 | } | |
787 | } | |
788 | /* Set DH derivation parameters and initialise unwrap context */ | |
789 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
790 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
791 | return 0; | |
792 | } | |
793 | return 1; | |
794 | } | |
bd59f2b9 DSH |
795 | |
796 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
797 | { |
798 | EVP_PKEY_CTX *pctx; | |
799 | EVP_PKEY *pkey; | |
800 | EVP_CIPHER_CTX *ctx; | |
801 | int keylen; | |
802 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 803 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
804 | ASN1_BIT_STRING *pubkey; |
805 | ASN1_STRING *wrap_str; | |
806 | ASN1_OCTET_STRING *ukm; | |
807 | unsigned char *penc = NULL, *dukm = NULL; | |
808 | int penclen; | |
809 | size_t dukmlen = 0; | |
810 | int rv = 0; | |
811 | int kdf_type, wrap_nid; | |
812 | const EVP_MD *kdf_md; | |
12a765a5 | 813 | |
0f113f3e | 814 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 | 815 | if (pctx == NULL) |
0f113f3e MC |
816 | return 0; |
817 | /* Get ephemeral key */ | |
818 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
819 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
820 | NULL, NULL, NULL)) | |
821 | goto err; | |
822 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
823 | /* Is everything uninitialised? */ | |
824 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 825 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
12a765a5 RS |
826 | |
827 | if (pubk == NULL) | |
0f113f3e MC |
828 | goto err; |
829 | /* Set the key */ | |
830 | ||
831 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
832 | ASN1_INTEGER_free(pubk); | |
833 | if (penclen <= 0) | |
834 | goto err; | |
835 | ASN1_STRING_set0(pubkey, penc, penclen); | |
836 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
837 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
838 | ||
839 | penc = NULL; | |
840 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
841 | V_ASN1_UNDEF, NULL); | |
842 | } | |
843 | ||
0d4fb843 | 844 | /* See if custom parameters set */ |
0f113f3e MC |
845 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
846 | if (kdf_type <= 0) | |
847 | goto err; | |
848 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
849 | goto err; | |
850 | ||
851 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
852 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
853 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
854 | goto err; | |
855 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
856 | /* Unknown KDF */ | |
857 | goto err; | |
858 | if (kdf_md == NULL) { | |
859 | /* Only SHA1 supported */ | |
860 | kdf_md = EVP_sha1(); | |
861 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
862 | goto err; | |
863 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
864 | /* Unsupported digest */ | |
865 | goto err; | |
866 | ||
867 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
868 | goto err; | |
869 | ||
870 | /* Get wrap NID */ | |
871 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
872 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
873 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
874 | goto err; | |
875 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
876 | ||
877 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
878 | ||
879 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 880 | if (wrap_alg == NULL) |
0f113f3e MC |
881 | goto err; |
882 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
883 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 884 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
885 | goto err; |
886 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
887 | goto err; | |
888 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
889 | ASN1_TYPE_free(wrap_alg->parameter); | |
890 | wrap_alg->parameter = NULL; | |
891 | } | |
892 | ||
893 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
894 | goto err; | |
895 | ||
896 | if (ukm) { | |
897 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 898 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
899 | if (!dukm) |
900 | goto err; | |
901 | } | |
902 | ||
903 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
904 | goto err; | |
905 | dukm = NULL; | |
906 | ||
907 | /* | |
908 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
909 | * of another AlgorithmIdentifier. | |
910 | */ | |
911 | penc = NULL; | |
912 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
12a765a5 | 913 | if (penc == NULL || penclen == 0) |
0f113f3e MC |
914 | goto err; |
915 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 916 | if (wrap_str == NULL) |
0f113f3e MC |
917 | goto err; |
918 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
919 | penc = NULL; | |
920 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
921 | V_ASN1_SEQUENCE, wrap_str); | |
922 | ||
923 | rv = 1; | |
924 | ||
925 | err: | |
222561fe RS |
926 | OPENSSL_free(penc); |
927 | X509_ALGOR_free(wrap_alg); | |
6624e1f7 | 928 | OPENSSL_free(dukm); |
0f113f3e MC |
929 | return rv; |
930 | } | |
bd59f2b9 DSH |
931 | |
932 | #endif |