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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 | 26 | #include <openssl/core_names.h> |
110bff61 | 27 | #include "openssl/param_build.h" |
0abae163 | 28 | #include "internal/ffc.h" |
adbc603d | 29 | |
0f113f3e MC |
30 | /* |
31 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
32 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
33 | */ |
34 | ||
0f113f3e MC |
35 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
36 | long length) | |
37 | { | |
38 | if (pkey->ameth == &dhx_asn1_meth) | |
39 | return d2i_DHxparams(NULL, pp, length); | |
40 | return d2i_DHparams(NULL, pp, length); | |
41 | } | |
afb14cda DSH |
42 | |
43 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
44 | { |
45 | if (pkey->ameth == &dhx_asn1_meth) | |
46 | return i2d_DHxparams(a, pp); | |
47 | return i2d_DHparams(a, pp); | |
48 | } | |
afb14cda | 49 | |
adbc603d | 50 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
51 | { |
52 | DH_free(pkey->pkey.dh); | |
53 | } | |
adbc603d | 54 | |
ceb46789 | 55 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
56 | { |
57 | const unsigned char *p, *pm; | |
58 | int pklen, pmlen; | |
59 | int ptype; | |
ac4e2577 DSH |
60 | const void *pval; |
61 | const ASN1_STRING *pstr; | |
0f113f3e MC |
62 | X509_ALGOR *palg; |
63 | ASN1_INTEGER *public_key = NULL; | |
64 | ||
65 | DH *dh = NULL; | |
66 | ||
67 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
68 | return 0; | |
69 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
70 | ||
71 | if (ptype != V_ASN1_SEQUENCE) { | |
72 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
73 | goto err; | |
74 | } | |
75 | ||
76 | pstr = pval; | |
77 | pm = pstr->data; | |
78 | pmlen = pstr->length; | |
79 | ||
75ebbd9a | 80 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
81 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
82 | goto err; | |
83 | } | |
84 | ||
75ebbd9a | 85 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
86 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
87 | goto err; | |
88 | } | |
89 | ||
90 | /* We have parameters now set public key */ | |
75ebbd9a | 91 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
92 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
93 | goto err; | |
94 | } | |
95 | ||
96 | ASN1_INTEGER_free(public_key); | |
97 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
98 | return 1; | |
99 | ||
100 | err: | |
2ace7450 | 101 | ASN1_INTEGER_free(public_key); |
d6407083 | 102 | DH_free(dh); |
0f113f3e | 103 | return 0; |
4c97a04e | 104 | |
0f113f3e | 105 | } |
4c97a04e | 106 | |
0f113f3e MC |
107 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
108 | { | |
109 | DH *dh; | |
0f113f3e MC |
110 | int ptype; |
111 | unsigned char *penc = NULL; | |
112 | int penclen; | |
113 | ASN1_STRING *str; | |
114 | ASN1_INTEGER *pub_key = NULL; | |
115 | ||
116 | dh = pkey->pkey.dh; | |
117 | ||
118 | str = ASN1_STRING_new(); | |
90945fa3 | 119 | if (str == NULL) { |
6aa8dab2 MC |
120 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
121 | goto err; | |
122 | } | |
0f113f3e MC |
123 | str->length = i2d_dhp(pkey, dh, &str->data); |
124 | if (str->length <= 0) { | |
125 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
126 | goto err; | |
127 | } | |
0f113f3e MC |
128 | ptype = V_ASN1_SEQUENCE; |
129 | ||
130 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
12a765a5 | 131 | if (pub_key == NULL) |
0f113f3e MC |
132 | goto err; |
133 | ||
134 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
135 | ||
136 | ASN1_INTEGER_free(pub_key); | |
137 | ||
138 | if (penclen <= 0) { | |
139 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
140 | goto err; | |
141 | } | |
142 | ||
143 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 144 | ptype, str, penc, penclen)) |
0f113f3e MC |
145 | return 1; |
146 | ||
147 | err: | |
b548a1f1 | 148 | OPENSSL_free(penc); |
0dfb9398 | 149 | ASN1_STRING_free(str); |
0f113f3e MC |
150 | |
151 | return 0; | |
152 | } | |
4c97a04e | 153 | |
0f113f3e MC |
154 | /* |
155 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
156 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 157 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 158 | */ |
4c97a04e | 159 | |
245c6bc3 | 160 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
161 | { |
162 | const unsigned char *p, *pm; | |
163 | int pklen, pmlen; | |
164 | int ptype; | |
ac4e2577 DSH |
165 | const void *pval; |
166 | const ASN1_STRING *pstr; | |
245c6bc3 | 167 | const X509_ALGOR *palg; |
0f113f3e | 168 | ASN1_INTEGER *privkey = NULL; |
0f113f3e MC |
169 | DH *dh = NULL; |
170 | ||
171 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
172 | return 0; | |
173 | ||
174 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
175 | ||
176 | if (ptype != V_ASN1_SEQUENCE) | |
177 | goto decerr; | |
75ebbd9a | 178 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
179 | goto decerr; |
180 | ||
181 | pstr = pval; | |
182 | pm = pstr->data; | |
183 | pmlen = pstr->length; | |
75ebbd9a | 184 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 185 | goto decerr; |
75ebbd9a | 186 | |
0f113f3e | 187 | /* We have parameters now set private key */ |
74924dcb RS |
188 | if ((dh->priv_key = BN_secure_new()) == NULL |
189 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
190 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
191 | goto dherr; | |
192 | } | |
8b84b075 | 193 | /* Calculate public key, increments dirty_cnt */ |
0f113f3e MC |
194 | if (!DH_generate_key(dh)) |
195 | goto dherr; | |
196 | ||
197 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
198 | ||
a8ae0891 | 199 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
200 | |
201 | return 1; | |
202 | ||
203 | decerr: | |
204 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
205 | dherr: | |
206 | DH_free(dh); | |
a8ae0891 | 207 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
208 | return 0; |
209 | } | |
4c97a04e DSH |
210 | |
211 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
212 | { | |
0f113f3e MC |
213 | ASN1_STRING *params = NULL; |
214 | ASN1_INTEGER *prkey = NULL; | |
215 | unsigned char *dp = NULL; | |
216 | int dplen; | |
217 | ||
218 | params = ASN1_STRING_new(); | |
219 | ||
90945fa3 | 220 | if (params == NULL) { |
0f113f3e MC |
221 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
222 | goto err; | |
223 | } | |
224 | ||
225 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
226 | if (params->length <= 0) { | |
227 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
228 | goto err; | |
229 | } | |
230 | params->type = V_ASN1_SEQUENCE; | |
231 | ||
232 | /* Get private key into integer */ | |
233 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
234 | ||
12a765a5 | 235 | if (prkey == NULL) { |
0f113f3e MC |
236 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); |
237 | goto err; | |
238 | } | |
239 | ||
240 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
241 | ||
a8ae0891 | 242 | ASN1_STRING_clear_free(prkey); |
1549a265 | 243 | prkey = NULL; |
0f113f3e MC |
244 | |
245 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
246 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
247 | goto err; | |
248 | ||
249 | return 1; | |
250 | ||
251 | err: | |
b548a1f1 | 252 | OPENSSL_free(dp); |
0dfb9398 | 253 | ASN1_STRING_free(params); |
2ace7450 | 254 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 255 | return 0; |
4c97a04e DSH |
256 | } |
257 | ||
3e4585c8 | 258 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
259 | const unsigned char **pder, int derlen) |
260 | { | |
261 | DH *dh; | |
75ebbd9a RS |
262 | |
263 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
264 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
265 | return 0; | |
266 | } | |
8b84b075 | 267 | dh->dirty_cnt++; |
0f113f3e MC |
268 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); |
269 | return 1; | |
270 | } | |
3e4585c8 DSH |
271 | |
272 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
273 | { |
274 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
275 | } | |
3e4585c8 | 276 | |
a773b52a | 277 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 278 | { |
66696478 | 279 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 280 | const char *ktype = NULL; |
0f113f3e MC |
281 | BIGNUM *priv_key, *pub_key; |
282 | ||
283 | if (ptype == 2) | |
284 | priv_key = x->priv_key; | |
285 | else | |
286 | priv_key = NULL; | |
287 | ||
288 | if (ptype > 0) | |
289 | pub_key = x->pub_key; | |
290 | else | |
291 | pub_key = NULL; | |
292 | ||
dc8de3e6 | 293 | if (x->params.p == NULL || (ptype == 2 && priv_key == NULL) |
1d54ef34 | 294 | || (ptype > 0 && pub_key == NULL)) { |
0f113f3e MC |
295 | reason = ERR_R_PASSED_NULL_PARAMETER; |
296 | goto err; | |
297 | } | |
298 | ||
0f113f3e MC |
299 | if (ptype == 2) |
300 | ktype = "DH Private-Key"; | |
301 | else if (ptype == 1) | |
302 | ktype = "DH Public-Key"; | |
303 | else | |
304 | ktype = "DH Parameters"; | |
305 | ||
756f5c6c | 306 | if (!BIO_indent(bp, indent, 128) |
dc8de3e6 | 307 | || BIO_printf(bp, "%s: (%d bit)\n", ktype, DH_bits(x)) <= 0) |
0f113f3e MC |
308 | goto err; |
309 | indent += 4; | |
310 | ||
a773b52a | 311 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 312 | goto err; |
a773b52a | 313 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
314 | goto err; |
315 | ||
dc8de3e6 | 316 | if (!ffc_params_print(bp, &x->params, indent)) |
0f113f3e | 317 | goto err; |
756f5c6c | 318 | |
0f113f3e | 319 | if (x->length != 0) { |
756f5c6c P |
320 | if (!BIO_indent(bp, indent, 128) |
321 | || BIO_printf(bp, "recommended-private-length: %d bits\n", | |
322 | (int)x->length) <= 0) | |
0f113f3e MC |
323 | goto err; |
324 | } | |
325 | ||
66696478 RS |
326 | return 1; |
327 | ||
0f113f3e | 328 | err: |
66696478 | 329 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 330 | return 0; |
0f113f3e | 331 | } |
3e4585c8 | 332 | |
ceb46789 | 333 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e | 334 | { |
26a7d938 | 335 | return DH_size(pkey->pkey.dh); |
0f113f3e | 336 | } |
ceb46789 DSH |
337 | |
338 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e | 339 | { |
dc8de3e6 | 340 | return DH_bits(pkey->pkey.dh); |
0f113f3e | 341 | } |
ceb46789 | 342 | |
2514fa79 | 343 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
344 | { |
345 | return DH_security_bits(pkey->pkey.dh); | |
346 | } | |
2514fa79 | 347 | |
ffb1ac67 | 348 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e | 349 | { |
dc8de3e6 SL |
350 | return ffc_params_cmp(&a->pkey.dh->params, &a->pkey.dh->params, |
351 | a->ameth != &dhx_asn1_meth); | |
0f113f3e | 352 | } |
ceb46789 | 353 | |
d3cc91ee | 354 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
355 | { |
356 | if (is_x942 == -1) | |
dc8de3e6 SL |
357 | is_x942 = (from->params.q != NULL); |
358 | if (!ffc_params_copy(&to->params, &from->params)) | |
0f113f3e | 359 | return 0; |
dc8de3e6 | 360 | if (!is_x942) |
0f113f3e | 361 | to->length = from->length; |
8b84b075 | 362 | to->dirty_cnt++; |
0f113f3e MC |
363 | return 1; |
364 | } | |
d3cc91ee | 365 | |
9fdcc21f | 366 | DH *DHparams_dup(const DH *dh) |
0f113f3e MC |
367 | { |
368 | DH *ret; | |
369 | ret = DH_new(); | |
90945fa3 | 370 | if (ret == NULL) |
0f113f3e MC |
371 | return NULL; |
372 | if (!int_dh_param_copy(ret, dh, -1)) { | |
373 | DH_free(ret); | |
374 | return NULL; | |
375 | } | |
376 | return ret; | |
377 | } | |
d3cc91ee DSH |
378 | |
379 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 380 | { |
2986ecdc DSH |
381 | if (to->pkey.dh == NULL) { |
382 | to->pkey.dh = DH_new(); | |
383 | if (to->pkey.dh == NULL) | |
384 | return 0; | |
385 | } | |
0f113f3e MC |
386 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
387 | from->ameth == &dhx_asn1_meth); | |
388 | } | |
d3cc91ee | 389 | |
ffb1ac67 | 390 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e | 391 | { |
dc8de3e6 SL |
392 | return a->pkey.dh == NULL |
393 | || a->pkey.dh->params.p == NULL | |
394 | || a->pkey.dh->params.g == NULL; | |
0f113f3e | 395 | } |
ceb46789 DSH |
396 | |
397 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
398 | { |
399 | if (dh_cmp_parameters(a, b) == 0) | |
400 | return 0; | |
401 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
402 | return 0; | |
403 | else | |
404 | return 1; | |
405 | } | |
ceb46789 | 406 | |
3e4585c8 | 407 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
408 | ASN1_PCTX *ctx) |
409 | { | |
a773b52a | 410 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 411 | } |
ceb46789 DSH |
412 | |
413 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
414 | ASN1_PCTX *ctx) |
415 | { | |
a773b52a | 416 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 417 | } |
ceb46789 DSH |
418 | |
419 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
420 | ASN1_PCTX *ctx) |
421 | { | |
a773b52a | 422 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 423 | } |
3e4585c8 DSH |
424 | |
425 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 426 | { |
a773b52a | 427 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 428 | } |
3e4585c8 | 429 | |
bd59f2b9 DSH |
430 | #ifndef OPENSSL_NO_CMS |
431 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
432 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
433 | #endif | |
434 | ||
435 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
9aaecbfc | 436 | { |
437 | switch (op) { | |
438 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: | |
439 | return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1); | |
440 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
441 | return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2); | |
442 | default: | |
443 | return -2; | |
444 | } | |
445 | } | |
446 | ||
447 | static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
448 | { |
449 | switch (op) { | |
bd59f2b9 DSH |
450 | #ifndef OPENSSL_NO_CMS |
451 | ||
0f113f3e MC |
452 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
453 | if (arg1 == 1) | |
454 | return dh_cms_decrypt(arg2); | |
455 | else if (arg1 == 0) | |
456 | return dh_cms_encrypt(arg2); | |
457 | return -2; | |
bd59f2b9 | 458 | |
0f113f3e MC |
459 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
460 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
461 | return 1; | |
bd59f2b9 | 462 | #endif |
0f113f3e MC |
463 | default: |
464 | return -2; | |
465 | } | |
466 | ||
467 | } | |
468 | ||
b0004708 PY |
469 | static int dh_pkey_public_check(const EVP_PKEY *pkey) |
470 | { | |
471 | DH *dh = pkey->pkey.dh; | |
472 | ||
473 | if (dh->pub_key == NULL) { | |
474 | DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY); | |
475 | return 0; | |
476 | } | |
477 | ||
478 | return DH_check_pub_key_ex(dh, dh->pub_key); | |
479 | } | |
480 | ||
481 | static int dh_pkey_param_check(const EVP_PKEY *pkey) | |
482 | { | |
483 | DH *dh = pkey->pkey.dh; | |
484 | ||
485 | return DH_check_ex(dh); | |
486 | } | |
487 | ||
8b84b075 RL |
488 | static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey) |
489 | { | |
490 | return pkey->pkey.dh->dirty_cnt; | |
491 | } | |
492 | ||
b305452f | 493 | static int dh_pkey_export_to(const EVP_PKEY *from, void *to_keydata, |
76e23fc5 MC |
494 | EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx, |
495 | const char *propq) | |
8b84b075 | 496 | { |
b305452f | 497 | DH *dh = from->pkey.dh; |
6d4e6009 | 498 | OSSL_PARAM_BLD *tmpl; |
8b84b075 RL |
499 | const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh); |
500 | const BIGNUM *pub_key = DH_get0_pub_key(dh); | |
501 | const BIGNUM *priv_key = DH_get0_priv_key(dh); | |
6d4e6009 | 502 | OSSL_PARAM *params = NULL; |
0996cff9 | 503 | int selection = 0; |
6d4e6009 | 504 | int rv = 0; |
8b84b075 | 505 | |
df13defd RL |
506 | /* |
507 | * If the DH method is foreign, then we can't be sure of anything, and | |
508 | * can therefore not export or pretend to export. | |
509 | */ | |
510 | if (dh_get_method(dh) != DH_OpenSSL()) | |
511 | return 0; | |
512 | ||
21fb7067 | 513 | if (p == NULL || g == NULL) |
b305452f | 514 | return 0; |
8b84b075 | 515 | |
6d4e6009 P |
516 | tmpl = OSSL_PARAM_BLD_new(); |
517 | if (tmpl == NULL) | |
b305452f | 518 | return 0; |
6d4e6009 P |
519 | if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, p) |
520 | || !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, g)) | |
521 | goto err; | |
8b84b075 | 522 | if (q != NULL) { |
6d4e6009 P |
523 | if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_Q, q)) |
524 | goto err; | |
8b84b075 | 525 | } |
0996cff9 RL |
526 | selection |= OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS; |
527 | if (pub_key != NULL) { | |
6d4e6009 P |
528 | if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key)) |
529 | goto err; | |
0996cff9 RL |
530 | selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY; |
531 | } | |
b305452f | 532 | if (priv_key != NULL) { |
6d4e6009 | 533 | if (!OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY, |
b305452f | 534 | priv_key)) |
6d4e6009 | 535 | goto err; |
0996cff9 | 536 | selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY; |
8b84b075 RL |
537 | } |
538 | ||
6d4e6009 P |
539 | if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL) |
540 | goto err; | |
8b84b075 RL |
541 | |
542 | /* We export, the provider imports */ | |
0996cff9 | 543 | rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params); |
8b84b075 | 544 | |
6d4e6009 P |
545 | OSSL_PARAM_BLD_free_params(params); |
546 | err: | |
547 | OSSL_PARAM_BLD_free(tmpl); | |
b305452f | 548 | return rv; |
8b84b075 RL |
549 | } |
550 | ||
0abae163 RL |
551 | static int dh_pkey_import_from(const OSSL_PARAM params[], void *key) |
552 | { | |
553 | EVP_PKEY *pkey = key; | |
554 | DH *dh = DH_new(); | |
555 | ||
556 | if (dh == NULL) { | |
557 | ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | if (!ffc_fromdata(dh_get0_params(dh), params) | |
562 | || !dh_key_fromdata(dh, params) | |
563 | || !EVP_PKEY_assign_DH(pkey, dh)) { | |
564 | DH_free(dh); | |
565 | return 0; | |
566 | } | |
567 | return 1; | |
568 | } | |
569 | ||
0f113f3e MC |
570 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { |
571 | EVP_PKEY_DH, | |
572 | EVP_PKEY_DH, | |
573 | 0, | |
574 | ||
575 | "DH", | |
576 | "OpenSSL PKCS#3 DH method", | |
577 | ||
578 | dh_pub_decode, | |
579 | dh_pub_encode, | |
580 | dh_pub_cmp, | |
581 | dh_public_print, | |
582 | ||
583 | dh_priv_decode, | |
584 | dh_priv_encode, | |
585 | dh_private_print, | |
586 | ||
587 | int_dh_size, | |
588 | dh_bits, | |
589 | dh_security_bits, | |
590 | ||
591 | dh_param_decode, | |
592 | dh_param_encode, | |
593 | dh_missing_parameters, | |
594 | dh_copy_parameters, | |
595 | dh_cmp_parameters, | |
596 | dh_param_print, | |
597 | 0, | |
598 | ||
599 | int_dh_free, | |
9aaecbfc | 600 | dh_pkey_ctrl, |
b0004708 PY |
601 | |
602 | 0, 0, 0, 0, 0, | |
603 | ||
604 | 0, | |
605 | dh_pkey_public_check, | |
8b84b075 RL |
606 | dh_pkey_param_check, |
607 | ||
608 | 0, 0, 0, 0, | |
609 | ||
610 | dh_pkey_dirty_cnt, | |
611 | dh_pkey_export_to, | |
0abae163 | 612 | dh_pkey_import_from, |
0f113f3e MC |
613 | }; |
614 | ||
615 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
616 | EVP_PKEY_DHX, | |
617 | EVP_PKEY_DHX, | |
618 | 0, | |
619 | ||
620 | "X9.42 DH", | |
621 | "OpenSSL X9.42 DH method", | |
622 | ||
623 | dh_pub_decode, | |
624 | dh_pub_encode, | |
625 | dh_pub_cmp, | |
626 | dh_public_print, | |
627 | ||
628 | dh_priv_decode, | |
629 | dh_priv_encode, | |
630 | dh_private_print, | |
631 | ||
632 | int_dh_size, | |
633 | dh_bits, | |
634 | dh_security_bits, | |
635 | ||
636 | dh_param_decode, | |
637 | dh_param_encode, | |
638 | dh_missing_parameters, | |
639 | dh_copy_parameters, | |
640 | dh_cmp_parameters, | |
641 | dh_param_print, | |
642 | 0, | |
643 | ||
644 | int_dh_free, | |
9aaecbfc | 645 | dhx_pkey_ctrl, |
b0004708 PY |
646 | |
647 | 0, 0, 0, 0, 0, | |
648 | ||
649 | 0, | |
650 | dh_pkey_public_check, | |
651 | dh_pkey_param_check | |
0f113f3e MC |
652 | }; |
653 | ||
bd59f2b9 DSH |
654 | #ifndef OPENSSL_NO_CMS |
655 | ||
656 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
657 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
658 | { | |
ac4e2577 | 659 | const ASN1_OBJECT *aoid; |
0f113f3e | 660 | int atype; |
ac4e2577 | 661 | const void *aval; |
0f113f3e MC |
662 | ASN1_INTEGER *public_key = NULL; |
663 | int rv = 0; | |
664 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
665 | DH *dhpeer = NULL; | |
666 | const unsigned char *p; | |
667 | int plen; | |
668 | ||
669 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
670 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
671 | goto err; | |
672 | /* Only absent parameters allowed in RFC XXXX */ | |
673 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
674 | goto err; | |
675 | ||
676 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
12a765a5 | 677 | if (pk == NULL) |
0f113f3e MC |
678 | goto err; |
679 | if (pk->type != EVP_PKEY_DHX) | |
680 | goto err; | |
681 | /* Get parameters from parent key */ | |
682 | dhpeer = DHparams_dup(pk->pkey.dh); | |
683 | /* We have parameters now set public key */ | |
684 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 685 | p = ASN1_STRING_get0_data(pubkey); |
12a765a5 | 686 | if (p == NULL || plen == 0) |
0f113f3e MC |
687 | goto err; |
688 | ||
75ebbd9a | 689 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
690 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
691 | goto err; | |
692 | } | |
693 | ||
694 | /* We have parameters now set public key */ | |
75ebbd9a | 695 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
696 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
697 | goto err; | |
698 | } | |
699 | ||
700 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 701 | if (pkpeer == NULL) |
0f113f3e MC |
702 | goto err; |
703 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
704 | dhpeer = NULL; | |
705 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
706 | rv = 1; | |
707 | err: | |
2ace7450 | 708 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 709 | EVP_PKEY_free(pkpeer); |
d6407083 | 710 | DH_free(dhpeer); |
0f113f3e MC |
711 | return rv; |
712 | } | |
bd59f2b9 DSH |
713 | |
714 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
715 | { |
716 | int rv = 0; | |
717 | ||
718 | X509_ALGOR *alg, *kekalg = NULL; | |
719 | ASN1_OCTET_STRING *ukm; | |
720 | const unsigned char *p; | |
721 | unsigned char *dukm = NULL; | |
722 | size_t dukmlen = 0; | |
723 | int keylen, plen; | |
724 | const EVP_CIPHER *kekcipher; | |
725 | EVP_CIPHER_CTX *kekctx; | |
726 | ||
727 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
728 | goto err; | |
729 | ||
730 | /* | |
731 | * For DH we only have one OID permissible. If ever any more get defined | |
732 | * we will need something cleverer. | |
733 | */ | |
734 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
735 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
736 | goto err; | |
737 | } | |
738 | ||
739 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
740 | goto err; | |
741 | ||
742 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
743 | goto err; | |
744 | ||
745 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
746 | goto err; | |
747 | ||
748 | p = alg->parameter->value.sequence->data; | |
749 | plen = alg->parameter->value.sequence->length; | |
750 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
751 | if (!kekalg) | |
752 | goto err; | |
753 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
754 | if (!kekctx) | |
755 | goto err; | |
756 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
757 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
758 | goto err; | |
759 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
760 | goto err; | |
761 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
762 | goto err; | |
763 | ||
764 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
765 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
766 | goto err; | |
767 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
768 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
769 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
770 | <= 0) | |
771 | goto err; | |
772 | ||
773 | if (ukm) { | |
774 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 775 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
776 | if (!dukm) |
777 | goto err; | |
778 | } | |
779 | ||
780 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
781 | goto err; | |
782 | dukm = NULL; | |
783 | ||
784 | rv = 1; | |
785 | err: | |
222561fe RS |
786 | X509_ALGOR_free(kekalg); |
787 | OPENSSL_free(dukm); | |
0f113f3e MC |
788 | return rv; |
789 | } | |
bd59f2b9 DSH |
790 | |
791 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
792 | { |
793 | EVP_PKEY_CTX *pctx; | |
dc8de3e6 | 794 | |
0f113f3e | 795 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 RS |
796 | |
797 | if (pctx == NULL) | |
0f113f3e MC |
798 | return 0; |
799 | /* See if we need to set peer key */ | |
800 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
801 | X509_ALGOR *alg; | |
802 | ASN1_BIT_STRING *pubkey; | |
803 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
804 | NULL, NULL, NULL)) | |
805 | return 0; | |
806 | if (!alg || !pubkey) | |
807 | return 0; | |
808 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
809 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
810 | return 0; | |
811 | } | |
812 | } | |
813 | /* Set DH derivation parameters and initialise unwrap context */ | |
814 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
815 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
816 | return 0; | |
817 | } | |
818 | return 1; | |
819 | } | |
bd59f2b9 DSH |
820 | |
821 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
822 | { |
823 | EVP_PKEY_CTX *pctx; | |
824 | EVP_PKEY *pkey; | |
825 | EVP_CIPHER_CTX *ctx; | |
826 | int keylen; | |
827 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 828 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
829 | ASN1_BIT_STRING *pubkey; |
830 | ASN1_STRING *wrap_str; | |
831 | ASN1_OCTET_STRING *ukm; | |
832 | unsigned char *penc = NULL, *dukm = NULL; | |
833 | int penclen; | |
834 | size_t dukmlen = 0; | |
835 | int rv = 0; | |
836 | int kdf_type, wrap_nid; | |
837 | const EVP_MD *kdf_md; | |
12a765a5 | 838 | |
0f113f3e | 839 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); |
12a765a5 | 840 | if (pctx == NULL) |
0f113f3e MC |
841 | return 0; |
842 | /* Get ephemeral key */ | |
843 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
844 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
845 | NULL, NULL, NULL)) | |
846 | goto err; | |
847 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
848 | /* Is everything uninitialised? */ | |
849 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 850 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
12a765a5 RS |
851 | |
852 | if (pubk == NULL) | |
0f113f3e MC |
853 | goto err; |
854 | /* Set the key */ | |
855 | ||
856 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
857 | ASN1_INTEGER_free(pubk); | |
858 | if (penclen <= 0) | |
859 | goto err; | |
860 | ASN1_STRING_set0(pubkey, penc, penclen); | |
861 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
862 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
863 | ||
864 | penc = NULL; | |
865 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
866 | V_ASN1_UNDEF, NULL); | |
867 | } | |
868 | ||
0d4fb843 | 869 | /* See if custom parameters set */ |
0f113f3e MC |
870 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
871 | if (kdf_type <= 0) | |
872 | goto err; | |
873 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
874 | goto err; | |
875 | ||
876 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
877 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
878 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
879 | goto err; | |
880 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
881 | /* Unknown KDF */ | |
882 | goto err; | |
883 | if (kdf_md == NULL) { | |
884 | /* Only SHA1 supported */ | |
885 | kdf_md = EVP_sha1(); | |
886 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
887 | goto err; | |
888 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
889 | /* Unsupported digest */ | |
890 | goto err; | |
891 | ||
892 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
893 | goto err; | |
894 | ||
895 | /* Get wrap NID */ | |
896 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
897 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
898 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
899 | goto err; | |
900 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
901 | ||
902 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
903 | ||
904 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 905 | if (wrap_alg == NULL) |
0f113f3e MC |
906 | goto err; |
907 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
908 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 909 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
910 | goto err; |
911 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
912 | goto err; | |
913 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
914 | ASN1_TYPE_free(wrap_alg->parameter); | |
915 | wrap_alg->parameter = NULL; | |
916 | } | |
917 | ||
918 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
919 | goto err; | |
920 | ||
921 | if (ukm) { | |
922 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 923 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
924 | if (!dukm) |
925 | goto err; | |
926 | } | |
927 | ||
928 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
929 | goto err; | |
930 | dukm = NULL; | |
931 | ||
932 | /* | |
933 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
934 | * of another AlgorithmIdentifier. | |
935 | */ | |
936 | penc = NULL; | |
937 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
12a765a5 | 938 | if (penc == NULL || penclen == 0) |
0f113f3e MC |
939 | goto err; |
940 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 941 | if (wrap_str == NULL) |
0f113f3e MC |
942 | goto err; |
943 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
944 | penc = NULL; | |
945 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
946 | V_ASN1_SEQUENCE, wrap_str); | |
947 | ||
948 | rv = 1; | |
949 | ||
950 | err: | |
222561fe RS |
951 | OPENSSL_free(penc); |
952 | X509_ALGOR_free(wrap_alg); | |
6624e1f7 | 953 | OPENSSL_free(dukm); |
0f113f3e MC |
954 | return rv; |
955 | } | |
bd59f2b9 DSH |
956 | |
957 | #endif |