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Commit | Line | Data |
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0f113f3e | 1 | /* |
aa6bb135 | 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved. |
adbc603d | 3 | * |
e38873f5 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
adbc603d DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
adbc603d DSH |
12 | #include <openssl/x509.h> |
13 | #include <openssl/asn1.h> | |
0aeddcfa | 14 | #include "dh_locl.h" |
1e26a8ba | 15 | #include <openssl/bn.h> |
5fe736e5 | 16 | #include "internal/asn1_int.h" |
3aeb9348 | 17 | #include "internal/evp_int.h" |
3c27208f | 18 | #include <openssl/cms.h> |
8b84b075 RL |
19 | #include <openssl/core_names.h> |
20 | #include "internal/param_build.h" | |
adbc603d | 21 | |
0f113f3e MC |
22 | /* |
23 | * i2d/d2i like DH parameter functions which use the appropriate routine for | |
24 | * PKCS#3 DH or X9.42 DH. | |
afb14cda DSH |
25 | */ |
26 | ||
0f113f3e MC |
27 | static DH *d2i_dhp(const EVP_PKEY *pkey, const unsigned char **pp, |
28 | long length) | |
29 | { | |
30 | if (pkey->ameth == &dhx_asn1_meth) | |
31 | return d2i_DHxparams(NULL, pp, length); | |
32 | return d2i_DHparams(NULL, pp, length); | |
33 | } | |
afb14cda DSH |
34 | |
35 | static int i2d_dhp(const EVP_PKEY *pkey, const DH *a, unsigned char **pp) | |
0f113f3e MC |
36 | { |
37 | if (pkey->ameth == &dhx_asn1_meth) | |
38 | return i2d_DHxparams(a, pp); | |
39 | return i2d_DHparams(a, pp); | |
40 | } | |
afb14cda | 41 | |
adbc603d | 42 | static void int_dh_free(EVP_PKEY *pkey) |
0f113f3e MC |
43 | { |
44 | DH_free(pkey->pkey.dh); | |
45 | } | |
adbc603d | 46 | |
ceb46789 | 47 | static int dh_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
0f113f3e MC |
48 | { |
49 | const unsigned char *p, *pm; | |
50 | int pklen, pmlen; | |
51 | int ptype; | |
ac4e2577 DSH |
52 | const void *pval; |
53 | const ASN1_STRING *pstr; | |
0f113f3e MC |
54 | X509_ALGOR *palg; |
55 | ASN1_INTEGER *public_key = NULL; | |
56 | ||
57 | DH *dh = NULL; | |
58 | ||
59 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
60 | return 0; | |
61 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
62 | ||
63 | if (ptype != V_ASN1_SEQUENCE) { | |
64 | DHerr(DH_F_DH_PUB_DECODE, DH_R_PARAMETER_ENCODING_ERROR); | |
65 | goto err; | |
66 | } | |
67 | ||
68 | pstr = pval; | |
69 | pm = pstr->data; | |
70 | pmlen = pstr->length; | |
71 | ||
75ebbd9a | 72 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) { |
0f113f3e MC |
73 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
74 | goto err; | |
75 | } | |
76 | ||
75ebbd9a | 77 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) { |
0f113f3e MC |
78 | DHerr(DH_F_DH_PUB_DECODE, DH_R_DECODE_ERROR); |
79 | goto err; | |
80 | } | |
81 | ||
82 | /* We have parameters now set public key */ | |
75ebbd9a | 83 | if ((dh->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
84 | DHerr(DH_F_DH_PUB_DECODE, DH_R_BN_DECODE_ERROR); |
85 | goto err; | |
86 | } | |
87 | ||
88 | ASN1_INTEGER_free(public_key); | |
89 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
90 | return 1; | |
91 | ||
92 | err: | |
2ace7450 | 93 | ASN1_INTEGER_free(public_key); |
d6407083 | 94 | DH_free(dh); |
0f113f3e | 95 | return 0; |
4c97a04e | 96 | |
0f113f3e | 97 | } |
4c97a04e | 98 | |
0f113f3e MC |
99 | static int dh_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
100 | { | |
101 | DH *dh; | |
0f113f3e MC |
102 | int ptype; |
103 | unsigned char *penc = NULL; | |
104 | int penclen; | |
105 | ASN1_STRING *str; | |
106 | ASN1_INTEGER *pub_key = NULL; | |
107 | ||
108 | dh = pkey->pkey.dh; | |
109 | ||
110 | str = ASN1_STRING_new(); | |
90945fa3 | 111 | if (str == NULL) { |
6aa8dab2 MC |
112 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); |
113 | goto err; | |
114 | } | |
0f113f3e MC |
115 | str->length = i2d_dhp(pkey, dh, &str->data); |
116 | if (str->length <= 0) { | |
117 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
118 | goto err; | |
119 | } | |
0f113f3e MC |
120 | ptype = V_ASN1_SEQUENCE; |
121 | ||
122 | pub_key = BN_to_ASN1_INTEGER(dh->pub_key, NULL); | |
123 | if (!pub_key) | |
124 | goto err; | |
125 | ||
126 | penclen = i2d_ASN1_INTEGER(pub_key, &penc); | |
127 | ||
128 | ASN1_INTEGER_free(pub_key); | |
129 | ||
130 | if (penclen <= 0) { | |
131 | DHerr(DH_F_DH_PUB_ENCODE, ERR_R_MALLOC_FAILURE); | |
132 | goto err; | |
133 | } | |
134 | ||
135 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id), | |
6aa8dab2 | 136 | ptype, str, penc, penclen)) |
0f113f3e MC |
137 | return 1; |
138 | ||
139 | err: | |
b548a1f1 | 140 | OPENSSL_free(penc); |
0dfb9398 | 141 | ASN1_STRING_free(str); |
0f113f3e MC |
142 | |
143 | return 0; | |
144 | } | |
4c97a04e | 145 | |
0f113f3e MC |
146 | /* |
147 | * PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in that | |
148 | * the AlgorithmIdentifier contains the parameters, the private key is | |
0d4fb843 | 149 | * explicitly included and the pubkey must be recalculated. |
0f113f3e | 150 | */ |
4c97a04e | 151 | |
245c6bc3 | 152 | static int dh_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
153 | { |
154 | const unsigned char *p, *pm; | |
155 | int pklen, pmlen; | |
156 | int ptype; | |
ac4e2577 DSH |
157 | const void *pval; |
158 | const ASN1_STRING *pstr; | |
245c6bc3 | 159 | const X509_ALGOR *palg; |
0f113f3e MC |
160 | ASN1_INTEGER *privkey = NULL; |
161 | ||
162 | DH *dh = NULL; | |
163 | ||
164 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
165 | return 0; | |
166 | ||
167 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
168 | ||
169 | if (ptype != V_ASN1_SEQUENCE) | |
170 | goto decerr; | |
75ebbd9a | 171 | if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) |
0f113f3e MC |
172 | goto decerr; |
173 | ||
174 | pstr = pval; | |
175 | pm = pstr->data; | |
176 | pmlen = pstr->length; | |
75ebbd9a | 177 | if ((dh = d2i_dhp(pkey, &pm, pmlen)) == NULL) |
0f113f3e | 178 | goto decerr; |
75ebbd9a | 179 | |
0f113f3e | 180 | /* We have parameters now set private key */ |
74924dcb RS |
181 | if ((dh->priv_key = BN_secure_new()) == NULL |
182 | || !ASN1_INTEGER_to_BN(privkey, dh->priv_key)) { | |
0f113f3e MC |
183 | DHerr(DH_F_DH_PRIV_DECODE, DH_R_BN_ERROR); |
184 | goto dherr; | |
185 | } | |
8b84b075 | 186 | /* Calculate public key, increments dirty_cnt */ |
0f113f3e MC |
187 | if (!DH_generate_key(dh)) |
188 | goto dherr; | |
189 | ||
190 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); | |
191 | ||
a8ae0891 | 192 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
193 | |
194 | return 1; | |
195 | ||
196 | decerr: | |
197 | DHerr(DH_F_DH_PRIV_DECODE, EVP_R_DECODE_ERROR); | |
198 | dherr: | |
199 | DH_free(dh); | |
a8ae0891 | 200 | ASN1_STRING_clear_free(privkey); |
0f113f3e MC |
201 | return 0; |
202 | } | |
4c97a04e DSH |
203 | |
204 | static int dh_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) | |
205 | { | |
0f113f3e MC |
206 | ASN1_STRING *params = NULL; |
207 | ASN1_INTEGER *prkey = NULL; | |
208 | unsigned char *dp = NULL; | |
209 | int dplen; | |
210 | ||
211 | params = ASN1_STRING_new(); | |
212 | ||
90945fa3 | 213 | if (params == NULL) { |
0f113f3e MC |
214 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
215 | goto err; | |
216 | } | |
217 | ||
218 | params->length = i2d_dhp(pkey, pkey->pkey.dh, ¶ms->data); | |
219 | if (params->length <= 0) { | |
220 | DHerr(DH_F_DH_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); | |
221 | goto err; | |
222 | } | |
223 | params->type = V_ASN1_SEQUENCE; | |
224 | ||
225 | /* Get private key into integer */ | |
226 | prkey = BN_to_ASN1_INTEGER(pkey->pkey.dh->priv_key, NULL); | |
227 | ||
228 | if (!prkey) { | |
229 | DHerr(DH_F_DH_PRIV_ENCODE, DH_R_BN_ERROR); | |
230 | goto err; | |
231 | } | |
232 | ||
233 | dplen = i2d_ASN1_INTEGER(prkey, &dp); | |
234 | ||
a8ae0891 | 235 | ASN1_STRING_clear_free(prkey); |
1549a265 | 236 | prkey = NULL; |
0f113f3e MC |
237 | |
238 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0, | |
239 | V_ASN1_SEQUENCE, params, dp, dplen)) | |
240 | goto err; | |
241 | ||
242 | return 1; | |
243 | ||
244 | err: | |
b548a1f1 | 245 | OPENSSL_free(dp); |
0dfb9398 | 246 | ASN1_STRING_free(params); |
2ace7450 | 247 | ASN1_STRING_clear_free(prkey); |
0f113f3e | 248 | return 0; |
4c97a04e DSH |
249 | } |
250 | ||
3e4585c8 | 251 | static int dh_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
252 | const unsigned char **pder, int derlen) |
253 | { | |
254 | DH *dh; | |
75ebbd9a RS |
255 | |
256 | if ((dh = d2i_dhp(pkey, pder, derlen)) == NULL) { | |
0f113f3e MC |
257 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); |
258 | return 0; | |
259 | } | |
8b84b075 | 260 | dh->dirty_cnt++; |
0f113f3e MC |
261 | EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, dh); |
262 | return 1; | |
263 | } | |
3e4585c8 DSH |
264 | |
265 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
266 | { |
267 | return i2d_dhp(pkey, pkey->pkey.dh, pder); | |
268 | } | |
3e4585c8 | 269 | |
a773b52a | 270 | static int do_dh_print(BIO *bp, const DH *x, int indent, int ptype) |
0f113f3e | 271 | { |
66696478 | 272 | int reason = ERR_R_BUF_LIB; |
0f113f3e | 273 | const char *ktype = NULL; |
0f113f3e MC |
274 | BIGNUM *priv_key, *pub_key; |
275 | ||
276 | if (ptype == 2) | |
277 | priv_key = x->priv_key; | |
278 | else | |
279 | priv_key = NULL; | |
280 | ||
281 | if (ptype > 0) | |
282 | pub_key = x->pub_key; | |
283 | else | |
284 | pub_key = NULL; | |
285 | ||
1d54ef34 MC |
286 | if (x->p == NULL || (ptype == 2 && priv_key == NULL) |
287 | || (ptype > 0 && pub_key == NULL)) { | |
0f113f3e MC |
288 | reason = ERR_R_PASSED_NULL_PARAMETER; |
289 | goto err; | |
290 | } | |
291 | ||
0f113f3e MC |
292 | if (ptype == 2) |
293 | ktype = "DH Private-Key"; | |
294 | else if (ptype == 1) | |
295 | ktype = "DH Public-Key"; | |
296 | else | |
297 | ktype = "DH Parameters"; | |
298 | ||
0f113f3e MC |
299 | BIO_indent(bp, indent, 128); |
300 | if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) <= 0) | |
301 | goto err; | |
302 | indent += 4; | |
303 | ||
a773b52a | 304 | if (!ASN1_bn_print(bp, "private-key:", priv_key, NULL, indent)) |
0f113f3e | 305 | goto err; |
a773b52a | 306 | if (!ASN1_bn_print(bp, "public-key:", pub_key, NULL, indent)) |
0f113f3e MC |
307 | goto err; |
308 | ||
a773b52a | 309 | if (!ASN1_bn_print(bp, "prime:", x->p, NULL, indent)) |
0f113f3e | 310 | goto err; |
a773b52a | 311 | if (!ASN1_bn_print(bp, "generator:", x->g, NULL, indent)) |
0f113f3e | 312 | goto err; |
a773b52a | 313 | if (x->q && !ASN1_bn_print(bp, "subgroup order:", x->q, NULL, indent)) |
0f113f3e | 314 | goto err; |
a773b52a | 315 | if (x->j && !ASN1_bn_print(bp, "subgroup factor:", x->j, NULL, indent)) |
0f113f3e MC |
316 | goto err; |
317 | if (x->seed) { | |
318 | int i; | |
319 | BIO_indent(bp, indent, 128); | |
320 | BIO_puts(bp, "seed:"); | |
321 | for (i = 0; i < x->seedlen; i++) { | |
322 | if ((i % 15) == 0) { | |
323 | if (BIO_puts(bp, "\n") <= 0 | |
324 | || !BIO_indent(bp, indent + 4, 128)) | |
325 | goto err; | |
326 | } | |
327 | if (BIO_printf(bp, "%02x%s", x->seed[i], | |
328 | ((i + 1) == x->seedlen) ? "" : ":") <= 0) | |
329 | goto err; | |
330 | } | |
331 | if (BIO_write(bp, "\n", 1) <= 0) | |
26a7d938 | 332 | return 0; |
0f113f3e | 333 | } |
a773b52a | 334 | if (x->counter && !ASN1_bn_print(bp, "counter:", x->counter, NULL, indent)) |
0f113f3e MC |
335 | goto err; |
336 | if (x->length != 0) { | |
337 | BIO_indent(bp, indent, 128); | |
338 | if (BIO_printf(bp, "recommended-private-length: %d bits\n", | |
339 | (int)x->length) <= 0) | |
340 | goto err; | |
341 | } | |
342 | ||
66696478 RS |
343 | return 1; |
344 | ||
0f113f3e | 345 | err: |
66696478 | 346 | DHerr(DH_F_DO_DH_PRINT, reason); |
66696478 | 347 | return 0; |
0f113f3e | 348 | } |
3e4585c8 | 349 | |
ceb46789 | 350 | static int int_dh_size(const EVP_PKEY *pkey) |
0f113f3e | 351 | { |
26a7d938 | 352 | return DH_size(pkey->pkey.dh); |
0f113f3e | 353 | } |
ceb46789 DSH |
354 | |
355 | static int dh_bits(const EVP_PKEY *pkey) | |
0f113f3e MC |
356 | { |
357 | return BN_num_bits(pkey->pkey.dh->p); | |
358 | } | |
ceb46789 | 359 | |
2514fa79 | 360 | static int dh_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
361 | { |
362 | return DH_security_bits(pkey->pkey.dh); | |
363 | } | |
2514fa79 | 364 | |
ffb1ac67 | 365 | static int dh_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
366 | { |
367 | if (BN_cmp(a->pkey.dh->p, b->pkey.dh->p) || | |
368 | BN_cmp(a->pkey.dh->g, b->pkey.dh->g)) | |
369 | return 0; | |
370 | else if (a->ameth == &dhx_asn1_meth) { | |
371 | if (BN_cmp(a->pkey.dh->q, b->pkey.dh->q)) | |
372 | return 0; | |
373 | } | |
374 | return 1; | |
375 | } | |
ffb1ac67 | 376 | |
d3cc91ee | 377 | static int int_dh_bn_cpy(BIGNUM **dst, const BIGNUM *src) |
0f113f3e MC |
378 | { |
379 | BIGNUM *a; | |
5f2d9c4d DSH |
380 | |
381 | /* | |
382 | * If source is read only just copy the pointer, so | |
383 | * we don't have to reallocate it. | |
384 | */ | |
385 | if (src == NULL) | |
0f113f3e | 386 | a = NULL; |
5f2d9c4d DSH |
387 | else if (BN_get_flags(src, BN_FLG_STATIC_DATA) |
388 | && !BN_get_flags(src, BN_FLG_MALLOCED)) | |
389 | a = (BIGNUM *)src; | |
390 | else if ((a = BN_dup(src)) == NULL) | |
391 | return 0; | |
392 | BN_clear_free(*dst); | |
0f113f3e MC |
393 | *dst = a; |
394 | return 1; | |
395 | } | |
ceb46789 | 396 | |
d3cc91ee | 397 | static int int_dh_param_copy(DH *to, const DH *from, int is_x942) |
0f113f3e MC |
398 | { |
399 | if (is_x942 == -1) | |
400 | is_x942 = ! !from->q; | |
401 | if (!int_dh_bn_cpy(&to->p, from->p)) | |
402 | return 0; | |
403 | if (!int_dh_bn_cpy(&to->g, from->g)) | |
404 | return 0; | |
405 | if (is_x942) { | |
406 | if (!int_dh_bn_cpy(&to->q, from->q)) | |
407 | return 0; | |
408 | if (!int_dh_bn_cpy(&to->j, from->j)) | |
409 | return 0; | |
b548a1f1 RS |
410 | OPENSSL_free(to->seed); |
411 | to->seed = NULL; | |
412 | to->seedlen = 0; | |
0f113f3e | 413 | if (from->seed) { |
7644a9ae | 414 | to->seed = OPENSSL_memdup(from->seed, from->seedlen); |
0f113f3e MC |
415 | if (!to->seed) |
416 | return 0; | |
417 | to->seedlen = from->seedlen; | |
418 | } | |
419 | } else | |
420 | to->length = from->length; | |
8b84b075 | 421 | to->dirty_cnt++; |
0f113f3e MC |
422 | return 1; |
423 | } | |
d3cc91ee | 424 | |
9fdcc21f | 425 | DH *DHparams_dup(const DH *dh) |
0f113f3e MC |
426 | { |
427 | DH *ret; | |
428 | ret = DH_new(); | |
90945fa3 | 429 | if (ret == NULL) |
0f113f3e MC |
430 | return NULL; |
431 | if (!int_dh_param_copy(ret, dh, -1)) { | |
432 | DH_free(ret); | |
433 | return NULL; | |
434 | } | |
435 | return ret; | |
436 | } | |
d3cc91ee DSH |
437 | |
438 | static int dh_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) | |
0f113f3e | 439 | { |
2986ecdc DSH |
440 | if (to->pkey.dh == NULL) { |
441 | to->pkey.dh = DH_new(); | |
442 | if (to->pkey.dh == NULL) | |
443 | return 0; | |
444 | } | |
0f113f3e MC |
445 | return int_dh_param_copy(to->pkey.dh, from->pkey.dh, |
446 | from->ameth == &dhx_asn1_meth); | |
447 | } | |
d3cc91ee | 448 | |
ffb1ac67 | 449 | static int dh_missing_parameters(const EVP_PKEY *a) |
0f113f3e | 450 | { |
f72f00d4 | 451 | if (a->pkey.dh == NULL || a->pkey.dh->p == NULL || a->pkey.dh->g == NULL) |
0f113f3e MC |
452 | return 1; |
453 | return 0; | |
454 | } | |
ceb46789 DSH |
455 | |
456 | static int dh_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
0f113f3e MC |
457 | { |
458 | if (dh_cmp_parameters(a, b) == 0) | |
459 | return 0; | |
460 | if (BN_cmp(b->pkey.dh->pub_key, a->pkey.dh->pub_key) != 0) | |
461 | return 0; | |
462 | else | |
463 | return 1; | |
464 | } | |
ceb46789 | 465 | |
3e4585c8 | 466 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
467 | ASN1_PCTX *ctx) |
468 | { | |
a773b52a | 469 | return do_dh_print(bp, pkey->pkey.dh, indent, 0); |
0f113f3e | 470 | } |
ceb46789 DSH |
471 | |
472 | static int dh_public_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
473 | ASN1_PCTX *ctx) |
474 | { | |
a773b52a | 475 | return do_dh_print(bp, pkey->pkey.dh, indent, 1); |
0f113f3e | 476 | } |
ceb46789 DSH |
477 | |
478 | static int dh_private_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
479 | ASN1_PCTX *ctx) |
480 | { | |
a773b52a | 481 | return do_dh_print(bp, pkey->pkey.dh, indent, 2); |
0f113f3e | 482 | } |
3e4585c8 DSH |
483 | |
484 | int DHparams_print(BIO *bp, const DH *x) | |
0f113f3e | 485 | { |
a773b52a | 486 | return do_dh_print(bp, x, 4, 0); |
0f113f3e | 487 | } |
3e4585c8 | 488 | |
bd59f2b9 DSH |
489 | #ifndef OPENSSL_NO_CMS |
490 | static int dh_cms_decrypt(CMS_RecipientInfo *ri); | |
491 | static int dh_cms_encrypt(CMS_RecipientInfo *ri); | |
492 | #endif | |
493 | ||
494 | static int dh_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
9aaecbfc | 495 | { |
496 | switch (op) { | |
497 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: | |
498 | return dh_buf2key(EVP_PKEY_get0_DH(pkey), arg2, arg1); | |
499 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
500 | return dh_key2buf(EVP_PKEY_get0_DH(pkey), arg2); | |
501 | default: | |
502 | return -2; | |
503 | } | |
504 | } | |
505 | ||
506 | static int dhx_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
0f113f3e MC |
507 | { |
508 | switch (op) { | |
bd59f2b9 DSH |
509 | #ifndef OPENSSL_NO_CMS |
510 | ||
0f113f3e MC |
511 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
512 | if (arg1 == 1) | |
513 | return dh_cms_decrypt(arg2); | |
514 | else if (arg1 == 0) | |
515 | return dh_cms_encrypt(arg2); | |
516 | return -2; | |
bd59f2b9 | 517 | |
0f113f3e MC |
518 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: |
519 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
520 | return 1; | |
bd59f2b9 | 521 | #endif |
0f113f3e MC |
522 | default: |
523 | return -2; | |
524 | } | |
525 | ||
526 | } | |
527 | ||
b0004708 PY |
528 | static int dh_pkey_public_check(const EVP_PKEY *pkey) |
529 | { | |
530 | DH *dh = pkey->pkey.dh; | |
531 | ||
532 | if (dh->pub_key == NULL) { | |
533 | DHerr(DH_F_DH_PKEY_PUBLIC_CHECK, DH_R_MISSING_PUBKEY); | |
534 | return 0; | |
535 | } | |
536 | ||
537 | return DH_check_pub_key_ex(dh, dh->pub_key); | |
538 | } | |
539 | ||
540 | static int dh_pkey_param_check(const EVP_PKEY *pkey) | |
541 | { | |
542 | DH *dh = pkey->pkey.dh; | |
543 | ||
544 | return DH_check_ex(dh); | |
545 | } | |
546 | ||
8b84b075 RL |
547 | static size_t dh_pkey_dirty_cnt(const EVP_PKEY *pkey) |
548 | { | |
549 | return pkey->pkey.dh->dirty_cnt; | |
550 | } | |
551 | ||
552 | static void *dh_pkey_export_to(const EVP_PKEY *pk, EVP_KEYMGMT *keymgmt) | |
553 | { | |
554 | DH *dh = pk->pkey.dh; | |
555 | OSSL_PARAM_BLD tmpl; | |
556 | const BIGNUM *p = DH_get0_p(dh), *g = DH_get0_g(dh), *q = DH_get0_q(dh); | |
557 | const BIGNUM *pub_key = DH_get0_pub_key(dh); | |
558 | const BIGNUM *priv_key = DH_get0_priv_key(dh); | |
559 | OSSL_PARAM *params; | |
560 | void *provkey = NULL; | |
561 | ||
562 | if (p == NULL || g == NULL || pub_key == NULL) | |
563 | return NULL; | |
564 | ||
565 | ossl_param_bld_init(&tmpl); | |
566 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DH_P, p) | |
567 | || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DH_G, g) | |
568 | || !ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DH_PUB_KEY, pub_key)) | |
569 | return NULL; | |
570 | ||
571 | if (q != NULL) { | |
572 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DH_Q, q)) | |
573 | return NULL; | |
574 | } | |
575 | ||
576 | if (priv_key != NULL) { | |
577 | if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_DH_PRIV_KEY, | |
578 | priv_key)) | |
579 | return NULL; | |
580 | } | |
581 | ||
582 | params = ossl_param_bld_to_param(&tmpl); | |
583 | ||
584 | /* We export, the provider imports */ | |
585 | provkey = evp_keymgmt_importkey(keymgmt, params); | |
586 | ||
587 | ossl_param_bld_free(params); | |
588 | return provkey; | |
589 | } | |
590 | ||
0f113f3e MC |
591 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = { |
592 | EVP_PKEY_DH, | |
593 | EVP_PKEY_DH, | |
594 | 0, | |
595 | ||
596 | "DH", | |
597 | "OpenSSL PKCS#3 DH method", | |
598 | ||
599 | dh_pub_decode, | |
600 | dh_pub_encode, | |
601 | dh_pub_cmp, | |
602 | dh_public_print, | |
603 | ||
604 | dh_priv_decode, | |
605 | dh_priv_encode, | |
606 | dh_private_print, | |
607 | ||
608 | int_dh_size, | |
609 | dh_bits, | |
610 | dh_security_bits, | |
611 | ||
612 | dh_param_decode, | |
613 | dh_param_encode, | |
614 | dh_missing_parameters, | |
615 | dh_copy_parameters, | |
616 | dh_cmp_parameters, | |
617 | dh_param_print, | |
618 | 0, | |
619 | ||
620 | int_dh_free, | |
9aaecbfc | 621 | dh_pkey_ctrl, |
b0004708 PY |
622 | |
623 | 0, 0, 0, 0, 0, | |
624 | ||
625 | 0, | |
626 | dh_pkey_public_check, | |
8b84b075 RL |
627 | dh_pkey_param_check, |
628 | ||
629 | 0, 0, 0, 0, | |
630 | ||
631 | dh_pkey_dirty_cnt, | |
632 | dh_pkey_export_to, | |
0f113f3e MC |
633 | }; |
634 | ||
635 | const EVP_PKEY_ASN1_METHOD dhx_asn1_meth = { | |
636 | EVP_PKEY_DHX, | |
637 | EVP_PKEY_DHX, | |
638 | 0, | |
639 | ||
640 | "X9.42 DH", | |
641 | "OpenSSL X9.42 DH method", | |
642 | ||
643 | dh_pub_decode, | |
644 | dh_pub_encode, | |
645 | dh_pub_cmp, | |
646 | dh_public_print, | |
647 | ||
648 | dh_priv_decode, | |
649 | dh_priv_encode, | |
650 | dh_private_print, | |
651 | ||
652 | int_dh_size, | |
653 | dh_bits, | |
654 | dh_security_bits, | |
655 | ||
656 | dh_param_decode, | |
657 | dh_param_encode, | |
658 | dh_missing_parameters, | |
659 | dh_copy_parameters, | |
660 | dh_cmp_parameters, | |
661 | dh_param_print, | |
662 | 0, | |
663 | ||
664 | int_dh_free, | |
9aaecbfc | 665 | dhx_pkey_ctrl, |
b0004708 PY |
666 | |
667 | 0, 0, 0, 0, 0, | |
668 | ||
669 | 0, | |
670 | dh_pkey_public_check, | |
671 | dh_pkey_param_check | |
0f113f3e MC |
672 | }; |
673 | ||
bd59f2b9 DSH |
674 | #ifndef OPENSSL_NO_CMS |
675 | ||
676 | static int dh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
677 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
678 | { | |
ac4e2577 | 679 | const ASN1_OBJECT *aoid; |
0f113f3e | 680 | int atype; |
ac4e2577 | 681 | const void *aval; |
0f113f3e MC |
682 | ASN1_INTEGER *public_key = NULL; |
683 | int rv = 0; | |
684 | EVP_PKEY *pkpeer = NULL, *pk = NULL; | |
685 | DH *dhpeer = NULL; | |
686 | const unsigned char *p; | |
687 | int plen; | |
688 | ||
689 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
690 | if (OBJ_obj2nid(aoid) != NID_dhpublicnumber) | |
691 | goto err; | |
692 | /* Only absent parameters allowed in RFC XXXX */ | |
693 | if (atype != V_ASN1_UNDEF && atype == V_ASN1_NULL) | |
694 | goto err; | |
695 | ||
696 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
697 | if (!pk) | |
698 | goto err; | |
699 | if (pk->type != EVP_PKEY_DHX) | |
700 | goto err; | |
701 | /* Get parameters from parent key */ | |
702 | dhpeer = DHparams_dup(pk->pkey.dh); | |
703 | /* We have parameters now set public key */ | |
704 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 705 | p = ASN1_STRING_get0_data(pubkey); |
0f113f3e MC |
706 | if (!p || !plen) |
707 | goto err; | |
708 | ||
75ebbd9a | 709 | if ((public_key = d2i_ASN1_INTEGER(NULL, &p, plen)) == NULL) { |
0f113f3e MC |
710 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_DECODE_ERROR); |
711 | goto err; | |
712 | } | |
713 | ||
714 | /* We have parameters now set public key */ | |
75ebbd9a | 715 | if ((dhpeer->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) { |
0f113f3e MC |
716 | DHerr(DH_F_DH_CMS_SET_PEERKEY, DH_R_BN_DECODE_ERROR); |
717 | goto err; | |
718 | } | |
719 | ||
720 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 721 | if (pkpeer == NULL) |
0f113f3e MC |
722 | goto err; |
723 | EVP_PKEY_assign(pkpeer, pk->ameth->pkey_id, dhpeer); | |
724 | dhpeer = NULL; | |
725 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
726 | rv = 1; | |
727 | err: | |
2ace7450 | 728 | ASN1_INTEGER_free(public_key); |
c5ba2d99 | 729 | EVP_PKEY_free(pkpeer); |
d6407083 | 730 | DH_free(dhpeer); |
0f113f3e MC |
731 | return rv; |
732 | } | |
bd59f2b9 DSH |
733 | |
734 | static int dh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) | |
0f113f3e MC |
735 | { |
736 | int rv = 0; | |
737 | ||
738 | X509_ALGOR *alg, *kekalg = NULL; | |
739 | ASN1_OCTET_STRING *ukm; | |
740 | const unsigned char *p; | |
741 | unsigned char *dukm = NULL; | |
742 | size_t dukmlen = 0; | |
743 | int keylen, plen; | |
744 | const EVP_CIPHER *kekcipher; | |
745 | EVP_CIPHER_CTX *kekctx; | |
746 | ||
747 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
748 | goto err; | |
749 | ||
750 | /* | |
751 | * For DH we only have one OID permissible. If ever any more get defined | |
752 | * we will need something cleverer. | |
753 | */ | |
754 | if (OBJ_obj2nid(alg->algorithm) != NID_id_smime_alg_ESDH) { | |
755 | DHerr(DH_F_DH_CMS_SET_SHARED_INFO, DH_R_KDF_PARAMETER_ERROR); | |
756 | goto err; | |
757 | } | |
758 | ||
759 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, EVP_PKEY_DH_KDF_X9_42) <= 0) | |
760 | goto err; | |
761 | ||
762 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, EVP_sha1()) <= 0) | |
763 | goto err; | |
764 | ||
765 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
766 | goto err; | |
767 | ||
768 | p = alg->parameter->value.sequence->data; | |
769 | plen = alg->parameter->value.sequence->length; | |
770 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
771 | if (!kekalg) | |
772 | goto err; | |
773 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
774 | if (!kekctx) | |
775 | goto err; | |
776 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
777 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
778 | goto err; | |
779 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
780 | goto err; | |
781 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
782 | goto err; | |
783 | ||
784 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
785 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
786 | goto err; | |
787 | /* Use OBJ_nid2obj to ensure we use built in OID that isn't freed */ | |
788 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, | |
789 | OBJ_nid2obj(EVP_CIPHER_type(kekcipher))) | |
790 | <= 0) | |
791 | goto err; | |
792 | ||
793 | if (ukm) { | |
794 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 795 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
796 | if (!dukm) |
797 | goto err; | |
798 | } | |
799 | ||
800 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
801 | goto err; | |
802 | dukm = NULL; | |
803 | ||
804 | rv = 1; | |
805 | err: | |
222561fe RS |
806 | X509_ALGOR_free(kekalg); |
807 | OPENSSL_free(dukm); | |
0f113f3e MC |
808 | return rv; |
809 | } | |
bd59f2b9 DSH |
810 | |
811 | static int dh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
812 | { |
813 | EVP_PKEY_CTX *pctx; | |
814 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
815 | if (!pctx) | |
816 | return 0; | |
817 | /* See if we need to set peer key */ | |
818 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
819 | X509_ALGOR *alg; | |
820 | ASN1_BIT_STRING *pubkey; | |
821 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
822 | NULL, NULL, NULL)) | |
823 | return 0; | |
824 | if (!alg || !pubkey) | |
825 | return 0; | |
826 | if (!dh_cms_set_peerkey(pctx, alg, pubkey)) { | |
827 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_PEER_KEY_ERROR); | |
828 | return 0; | |
829 | } | |
830 | } | |
831 | /* Set DH derivation parameters and initialise unwrap context */ | |
832 | if (!dh_cms_set_shared_info(pctx, ri)) { | |
833 | DHerr(DH_F_DH_CMS_DECRYPT, DH_R_SHARED_INFO_ERROR); | |
834 | return 0; | |
835 | } | |
836 | return 1; | |
837 | } | |
bd59f2b9 DSH |
838 | |
839 | static int dh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
840 | { |
841 | EVP_PKEY_CTX *pctx; | |
842 | EVP_PKEY *pkey; | |
843 | EVP_CIPHER_CTX *ctx; | |
844 | int keylen; | |
845 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 846 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
847 | ASN1_BIT_STRING *pubkey; |
848 | ASN1_STRING *wrap_str; | |
849 | ASN1_OCTET_STRING *ukm; | |
850 | unsigned char *penc = NULL, *dukm = NULL; | |
851 | int penclen; | |
852 | size_t dukmlen = 0; | |
853 | int rv = 0; | |
854 | int kdf_type, wrap_nid; | |
855 | const EVP_MD *kdf_md; | |
856 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
857 | if (!pctx) | |
858 | return 0; | |
859 | /* Get ephemeral key */ | |
860 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
861 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
862 | NULL, NULL, NULL)) | |
863 | goto err; | |
864 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
865 | /* Is everything uninitialised? */ | |
866 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
c5ba2d99 | 867 | ASN1_INTEGER *pubk = BN_to_ASN1_INTEGER(pkey->pkey.dh->pub_key, NULL); |
0f113f3e MC |
868 | if (!pubk) |
869 | goto err; | |
870 | /* Set the key */ | |
871 | ||
872 | penclen = i2d_ASN1_INTEGER(pubk, &penc); | |
873 | ASN1_INTEGER_free(pubk); | |
874 | if (penclen <= 0) | |
875 | goto err; | |
876 | ASN1_STRING_set0(pubkey, penc, penclen); | |
877 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
878 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
879 | ||
880 | penc = NULL; | |
881 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_dhpublicnumber), | |
882 | V_ASN1_UNDEF, NULL); | |
883 | } | |
884 | ||
0d4fb843 | 885 | /* See if custom parameters set */ |
0f113f3e MC |
886 | kdf_type = EVP_PKEY_CTX_get_dh_kdf_type(pctx); |
887 | if (kdf_type <= 0) | |
888 | goto err; | |
889 | if (!EVP_PKEY_CTX_get_dh_kdf_md(pctx, &kdf_md)) | |
890 | goto err; | |
891 | ||
892 | if (kdf_type == EVP_PKEY_DH_KDF_NONE) { | |
893 | kdf_type = EVP_PKEY_DH_KDF_X9_42; | |
894 | if (EVP_PKEY_CTX_set_dh_kdf_type(pctx, kdf_type) <= 0) | |
895 | goto err; | |
896 | } else if (kdf_type != EVP_PKEY_DH_KDF_X9_42) | |
897 | /* Unknown KDF */ | |
898 | goto err; | |
899 | if (kdf_md == NULL) { | |
900 | /* Only SHA1 supported */ | |
901 | kdf_md = EVP_sha1(); | |
902 | if (EVP_PKEY_CTX_set_dh_kdf_md(pctx, kdf_md) <= 0) | |
903 | goto err; | |
904 | } else if (EVP_MD_type(kdf_md) != NID_sha1) | |
905 | /* Unsupported digest */ | |
906 | goto err; | |
907 | ||
908 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
909 | goto err; | |
910 | ||
911 | /* Get wrap NID */ | |
912 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
913 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
914 | if (EVP_PKEY_CTX_set0_dh_kdf_oid(pctx, OBJ_nid2obj(wrap_nid)) <= 0) | |
915 | goto err; | |
916 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
917 | ||
918 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
919 | ||
920 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 921 | if (wrap_alg == NULL) |
0f113f3e MC |
922 | goto err; |
923 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
924 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 925 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
926 | goto err; |
927 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
928 | goto err; | |
929 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
930 | ASN1_TYPE_free(wrap_alg->parameter); | |
931 | wrap_alg->parameter = NULL; | |
932 | } | |
933 | ||
934 | if (EVP_PKEY_CTX_set_dh_kdf_outlen(pctx, keylen) <= 0) | |
935 | goto err; | |
936 | ||
937 | if (ukm) { | |
938 | dukmlen = ASN1_STRING_length(ukm); | |
17ebf85a | 939 | dukm = OPENSSL_memdup(ASN1_STRING_get0_data(ukm), dukmlen); |
0f113f3e MC |
940 | if (!dukm) |
941 | goto err; | |
942 | } | |
943 | ||
944 | if (EVP_PKEY_CTX_set0_dh_kdf_ukm(pctx, dukm, dukmlen) <= 0) | |
945 | goto err; | |
946 | dukm = NULL; | |
947 | ||
948 | /* | |
949 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
950 | * of another AlgorithmIdentifier. | |
951 | */ | |
952 | penc = NULL; | |
953 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
954 | if (!penc || !penclen) | |
955 | goto err; | |
956 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 957 | if (wrap_str == NULL) |
0f113f3e MC |
958 | goto err; |
959 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
960 | penc = NULL; | |
961 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_id_smime_alg_ESDH), | |
962 | V_ASN1_SEQUENCE, wrap_str); | |
963 | ||
964 | rv = 1; | |
965 | ||
966 | err: | |
222561fe RS |
967 | OPENSSL_free(penc); |
968 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
969 | return rv; |
970 | } | |
bd59f2b9 DSH |
971 | |
972 | #endif |