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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. |
448be743 | 3 | * |
aa6bb135 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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 | |
448be743 DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
448be743 DSH |
12 | #include <openssl/x509.h> |
13 | #include <openssl/ec.h> | |
1e26a8ba | 14 | #include <openssl/bn.h> |
3c27208f | 15 | #include <openssl/cms.h> |
88e20b85 | 16 | #include <openssl/asn1t.h> |
5fe736e5 | 17 | #include "internal/asn1_int.h" |
3aeb9348 | 18 | #include "internal/evp_int.h" |
b8a7bd83 | 19 | #include "ec_lcl.h" |
448be743 | 20 | |
e968561d | 21 | #ifndef OPENSSL_NO_CMS |
88e20b85 DSH |
22 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri); |
23 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri); | |
e968561d | 24 | #endif |
88e20b85 | 25 | |
448be743 | 26 | static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key) |
0f113f3e MC |
27 | { |
28 | const EC_GROUP *group; | |
29 | int nid; | |
30 | if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) { | |
31 | ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS); | |
32 | return 0; | |
33 | } | |
34 | if (EC_GROUP_get_asn1_flag(group) | |
35 | && (nid = EC_GROUP_get_curve_name(group))) | |
36 | /* we have a 'named curve' => just set the OID */ | |
37 | { | |
38 | *ppval = OBJ_nid2obj(nid); | |
39 | *pptype = V_ASN1_OBJECT; | |
40 | } else { /* explicit parameters */ | |
41 | ||
42 | ASN1_STRING *pstr = NULL; | |
43 | pstr = ASN1_STRING_new(); | |
90945fa3 | 44 | if (pstr == NULL) |
0f113f3e MC |
45 | return 0; |
46 | pstr->length = i2d_ECParameters(ec_key, &pstr->data); | |
47 | if (pstr->length <= 0) { | |
48 | ASN1_STRING_free(pstr); | |
49 | ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB); | |
50 | return 0; | |
51 | } | |
52 | *ppval = pstr; | |
53 | *pptype = V_ASN1_SEQUENCE; | |
54 | } | |
55 | return 1; | |
56 | } | |
448be743 | 57 | |
6f81892e | 58 | static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
0f113f3e MC |
59 | { |
60 | EC_KEY *ec_key = pkey->pkey.ec; | |
61 | void *pval = NULL; | |
62 | int ptype; | |
63 | unsigned char *penc = NULL, *p; | |
64 | int penclen; | |
65 | ||
66 | if (!eckey_param2type(&ptype, &pval, ec_key)) { | |
67 | ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB); | |
68 | return 0; | |
69 | } | |
70 | penclen = i2o_ECPublicKey(ec_key, NULL); | |
71 | if (penclen <= 0) | |
72 | goto err; | |
73 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 74 | if (penc == NULL) |
0f113f3e MC |
75 | goto err; |
76 | p = penc; | |
77 | penclen = i2o_ECPublicKey(ec_key, &p); | |
78 | if (penclen <= 0) | |
79 | goto err; | |
80 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC), | |
81 | ptype, pval, penc, penclen)) | |
82 | return 1; | |
83 | err: | |
84 | if (ptype == V_ASN1_OBJECT) | |
85 | ASN1_OBJECT_free(pval); | |
86 | else | |
87 | ASN1_STRING_free(pval); | |
b548a1f1 | 88 | OPENSSL_free(penc); |
0f113f3e MC |
89 | return 0; |
90 | } | |
448be743 | 91 | |
ac4e2577 | 92 | static EC_KEY *eckey_type2param(int ptype, const void *pval) |
0f113f3e MC |
93 | { |
94 | EC_KEY *eckey = NULL; | |
95 | if (ptype == V_ASN1_SEQUENCE) { | |
ac4e2577 | 96 | const ASN1_STRING *pstr = pval; |
0f113f3e MC |
97 | const unsigned char *pm = NULL; |
98 | int pmlen; | |
99 | pm = pstr->data; | |
100 | pmlen = pstr->length; | |
75ebbd9a | 101 | if ((eckey = d2i_ECParameters(NULL, &pm, pmlen)) == NULL) { |
0f113f3e MC |
102 | ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); |
103 | goto ecerr; | |
104 | } | |
105 | } else if (ptype == V_ASN1_OBJECT) { | |
ac4e2577 | 106 | const ASN1_OBJECT *poid = pval; |
0f113f3e MC |
107 | EC_GROUP *group; |
108 | ||
109 | /* | |
110 | * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID | |
111 | */ | |
112 | if ((eckey = EC_KEY_new()) == NULL) { | |
113 | ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE); | |
114 | goto ecerr; | |
115 | } | |
116 | group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid)); | |
117 | if (group == NULL) | |
118 | goto ecerr; | |
119 | EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); | |
120 | if (EC_KEY_set_group(eckey, group) == 0) | |
121 | goto ecerr; | |
122 | EC_GROUP_free(group); | |
123 | } else { | |
124 | ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); | |
125 | goto ecerr; | |
126 | } | |
127 | ||
128 | return eckey; | |
129 | ||
130 | ecerr: | |
8fdc3734 | 131 | EC_KEY_free(eckey); |
0f113f3e MC |
132 | return NULL; |
133 | } | |
448be743 DSH |
134 | |
135 | static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
0f113f3e MC |
136 | { |
137 | const unsigned char *p = NULL; | |
ac4e2577 | 138 | const void *pval; |
0f113f3e MC |
139 | int ptype, pklen; |
140 | EC_KEY *eckey = NULL; | |
141 | X509_ALGOR *palg; | |
142 | ||
143 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
144 | return 0; | |
145 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
146 | ||
147 | eckey = eckey_type2param(ptype, pval); | |
148 | ||
149 | if (!eckey) { | |
150 | ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | /* We have parameters now set public key */ | |
155 | if (!o2i_ECPublicKey(&eckey, &p, pklen)) { | |
156 | ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR); | |
157 | goto ecerr; | |
158 | } | |
159 | ||
160 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
161 | return 1; | |
162 | ||
163 | ecerr: | |
8fdc3734 | 164 | EC_KEY_free(eckey); |
0f113f3e MC |
165 | return 0; |
166 | } | |
448be743 | 167 | |
6f81892e | 168 | static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
169 | { |
170 | int r; | |
171 | const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec); | |
172 | const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), | |
173 | *pb = EC_KEY_get0_public_key(b->pkey.ec); | |
978ecbb0 DW |
174 | if (group == NULL || pa == NULL || pb == NULL) |
175 | return -2; | |
0f113f3e MC |
176 | r = EC_POINT_cmp(group, pa, pb, NULL); |
177 | if (r == 0) | |
178 | return 1; | |
179 | if (r == 1) | |
180 | return 0; | |
181 | return -2; | |
182 | } | |
6f81892e | 183 | |
245c6bc3 | 184 | static int eckey_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
185 | { |
186 | const unsigned char *p = NULL; | |
ac4e2577 | 187 | const void *pval; |
0f113f3e MC |
188 | int ptype, pklen; |
189 | EC_KEY *eckey = NULL; | |
245c6bc3 | 190 | const X509_ALGOR *palg; |
0f113f3e MC |
191 | |
192 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
193 | return 0; | |
194 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
195 | ||
196 | eckey = eckey_type2param(ptype, pval); | |
197 | ||
198 | if (!eckey) | |
199 | goto ecliberr; | |
200 | ||
201 | /* We have parameters now set private key */ | |
202 | if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { | |
203 | ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR); | |
204 | goto ecerr; | |
205 | } | |
206 | ||
0f113f3e MC |
207 | EVP_PKEY_assign_EC_KEY(pkey, eckey); |
208 | return 1; | |
209 | ||
210 | ecliberr: | |
211 | ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); | |
212 | ecerr: | |
8fdc3734 | 213 | EC_KEY_free(eckey); |
0f113f3e MC |
214 | return 0; |
215 | } | |
448be743 | 216 | |
6f81892e | 217 | static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
448be743 | 218 | { |
b8a7bd83 | 219 | EC_KEY ec_key = *(pkey->pkey.ec); |
0f113f3e MC |
220 | unsigned char *ep, *p; |
221 | int eplen, ptype; | |
222 | void *pval; | |
b8a7bd83 | 223 | unsigned int old_flags; |
0f113f3e | 224 | |
b8a7bd83 | 225 | if (!eckey_param2type(&ptype, &pval, &ec_key)) { |
0f113f3e MC |
226 | ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR); |
227 | return 0; | |
228 | } | |
229 | ||
230 | /* set the private key */ | |
231 | ||
232 | /* | |
233 | * do not include the parameters in the SEC1 private key see PKCS#11 | |
234 | * 12.11 | |
235 | */ | |
b8a7bd83 RL |
236 | old_flags = EC_KEY_get_enc_flags(&ec_key); |
237 | EC_KEY_set_enc_flags(&ec_key, old_flags | EC_PKEY_NO_PARAMETERS); | |
238 | ||
239 | eplen = i2d_ECPrivateKey(&ec_key, NULL); | |
0f113f3e | 240 | if (!eplen) { |
0f113f3e MC |
241 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); |
242 | return 0; | |
243 | } | |
b196e7d9 | 244 | ep = OPENSSL_malloc(eplen); |
90945fa3 | 245 | if (ep == NULL) { |
0f113f3e MC |
246 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
247 | return 0; | |
248 | } | |
249 | p = ep; | |
b8a7bd83 | 250 | if (!i2d_ECPrivateKey(&ec_key, &p)) { |
0f113f3e MC |
251 | OPENSSL_free(ep); |
252 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); | |
253 | return 0; | |
254 | } | |
0f113f3e MC |
255 | |
256 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0, | |
e0670973 Y |
257 | ptype, pval, ep, eplen)) { |
258 | OPENSSL_free(ep); | |
0f113f3e | 259 | return 0; |
e0670973 | 260 | } |
0f113f3e MC |
261 | |
262 | return 1; | |
448be743 DSH |
263 | } |
264 | ||
6f81892e | 265 | static int int_ec_size(const EVP_PKEY *pkey) |
0f113f3e MC |
266 | { |
267 | return ECDSA_size(pkey->pkey.ec); | |
268 | } | |
6f81892e DSH |
269 | |
270 | static int ec_bits(const EVP_PKEY *pkey) | |
0f113f3e | 271 | { |
be2e334f | 272 | return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec)); |
0f113f3e | 273 | } |
6f81892e | 274 | |
2514fa79 | 275 | static int ec_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
276 | { |
277 | int ecbits = ec_bits(pkey); | |
278 | if (ecbits >= 512) | |
279 | return 256; | |
280 | if (ecbits >= 384) | |
281 | return 192; | |
282 | if (ecbits >= 256) | |
283 | return 128; | |
284 | if (ecbits >= 224) | |
285 | return 112; | |
286 | if (ecbits >= 160) | |
287 | return 80; | |
288 | return ecbits / 2; | |
289 | } | |
2514fa79 | 290 | |
6f81892e | 291 | static int ec_missing_parameters(const EVP_PKEY *pkey) |
0f113f3e | 292 | { |
f72f00d4 | 293 | if (pkey->pkey.ec == NULL || EC_KEY_get0_group(pkey->pkey.ec) == NULL) |
0f113f3e MC |
294 | return 1; |
295 | return 0; | |
296 | } | |
6f81892e | 297 | |
930b0c4b | 298 | static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) |
0f113f3e MC |
299 | { |
300 | EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec)); | |
301 | if (group == NULL) | |
302 | return 0; | |
2986ecdc DSH |
303 | if (to->pkey.ec == NULL) { |
304 | to->pkey.ec = EC_KEY_new(); | |
305 | if (to->pkey.ec == NULL) | |
306 | return 0; | |
307 | } | |
0f113f3e MC |
308 | if (EC_KEY_set_group(to->pkey.ec, group) == 0) |
309 | return 0; | |
310 | EC_GROUP_free(group); | |
311 | return 1; | |
312 | } | |
6f81892e | 313 | |
930b0c4b | 314 | static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
315 | { |
316 | const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), | |
317 | *group_b = EC_KEY_get0_group(b->pkey.ec); | |
978ecbb0 DW |
318 | if (group_a == NULL || group_b == NULL) |
319 | return -2; | |
0f113f3e MC |
320 | if (EC_GROUP_cmp(group_a, group_b, NULL)) |
321 | return 0; | |
322 | else | |
323 | return 1; | |
324 | } | |
6f81892e DSH |
325 | |
326 | static void int_ec_free(EVP_PKEY *pkey) | |
0f113f3e MC |
327 | { |
328 | EC_KEY_free(pkey->pkey.ec); | |
329 | } | |
6f81892e | 330 | |
d6755bb6 DSH |
331 | typedef enum { |
332 | EC_KEY_PRINT_PRIVATE, | |
333 | EC_KEY_PRINT_PUBLIC, | |
334 | EC_KEY_PRINT_PARAM | |
335 | } ec_print_t; | |
336 | ||
337 | static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, ec_print_t ktype) | |
0f113f3e | 338 | { |
0f113f3e | 339 | const char *ecstr; |
7fc7d1a7 DSH |
340 | unsigned char *priv = NULL, *pub = NULL; |
341 | size_t privlen = 0, publen = 0; | |
342 | int ret = 0; | |
0f113f3e | 343 | const EC_GROUP *group; |
0f113f3e MC |
344 | |
345 | if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) { | |
7fc7d1a7 DSH |
346 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_PASSED_NULL_PARAMETER); |
347 | return 0; | |
0f113f3e MC |
348 | } |
349 | ||
82f52631 | 350 | if (ktype != EC_KEY_PRINT_PARAM && EC_KEY_get0_public_key(x) != NULL) { |
7fc7d1a7 DSH |
351 | publen = EC_KEY_key2buf(x, EC_KEY_get_conv_form(x), &pub, NULL); |
352 | if (publen == 0) | |
353 | goto err; | |
0f113f3e MC |
354 | } |
355 | ||
d6755bb6 | 356 | if (ktype == EC_KEY_PRINT_PRIVATE && EC_KEY_get0_private_key(x) != NULL) { |
7fc7d1a7 DSH |
357 | privlen = EC_KEY_priv2buf(x, &priv); |
358 | if (privlen == 0) | |
d810700b | 359 | goto err; |
d810700b | 360 | } |
0f113f3e | 361 | |
d6755bb6 | 362 | if (ktype == EC_KEY_PRINT_PRIVATE) |
0f113f3e | 363 | ecstr = "Private-Key"; |
d6755bb6 | 364 | else if (ktype == EC_KEY_PRINT_PUBLIC) |
0f113f3e MC |
365 | ecstr = "Public-Key"; |
366 | else | |
367 | ecstr = "ECDSA-Parameters"; | |
368 | ||
369 | if (!BIO_indent(bp, off, 128)) | |
370 | goto err; | |
be2e334f DSH |
371 | if (BIO_printf(bp, "%s: (%d bit)\n", ecstr, |
372 | EC_GROUP_order_bits(group)) <= 0) | |
0f113f3e MC |
373 | goto err; |
374 | ||
7fc7d1a7 | 375 | if (privlen != 0) { |
d810700b DSH |
376 | if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0) |
377 | goto err; | |
7fc7d1a7 | 378 | if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0) |
d810700b DSH |
379 | goto err; |
380 | } | |
381 | ||
7fc7d1a7 | 382 | if (publen != 0) { |
d810700b DSH |
383 | if (BIO_printf(bp, "%*spub:\n", off, "") <= 0) |
384 | goto err; | |
7fc7d1a7 | 385 | if (ASN1_buf_print(bp, pub, publen, off + 4) == 0) |
d810700b DSH |
386 | goto err; |
387 | } | |
388 | ||
0f113f3e MC |
389 | if (!ECPKParameters_print(bp, group, off)) |
390 | goto err; | |
391 | ret = 1; | |
392 | err: | |
393 | if (!ret) | |
7fc7d1a7 DSH |
394 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_EC_LIB); |
395 | OPENSSL_clear_free(priv, privlen); | |
396 | OPENSSL_free(pub); | |
d810700b | 397 | return ret; |
0f113f3e | 398 | } |
35208f36 | 399 | |
3e4585c8 | 400 | static int eckey_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
401 | const unsigned char **pder, int derlen) |
402 | { | |
403 | EC_KEY *eckey; | |
75ebbd9a RS |
404 | |
405 | if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
406 | ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB); |
407 | return 0; | |
408 | } | |
409 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
410 | return 1; | |
411 | } | |
3e4585c8 DSH |
412 | |
413 | static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
414 | { |
415 | return i2d_ECParameters(pkey->pkey.ec, pder); | |
416 | } | |
3e4585c8 | 417 | |
35208f36 | 418 | static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
419 | ASN1_PCTX *ctx) |
420 | { | |
d6755bb6 | 421 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PARAM); |
0f113f3e | 422 | } |
35208f36 DSH |
423 | |
424 | static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
425 | ASN1_PCTX *ctx) |
426 | { | |
d6755bb6 | 427 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PUBLIC); |
0f113f3e | 428 | } |
35208f36 DSH |
429 | |
430 | static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
431 | ASN1_PCTX *ctx) |
432 | { | |
d6755bb6 | 433 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE); |
0f113f3e | 434 | } |
35208f36 | 435 | |
e4263314 | 436 | static int old_ec_priv_decode(EVP_PKEY *pkey, |
0f113f3e MC |
437 | const unsigned char **pder, int derlen) |
438 | { | |
439 | EC_KEY *ec; | |
75ebbd9a RS |
440 | |
441 | if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
442 | ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR); |
443 | return 0; | |
444 | } | |
445 | EVP_PKEY_assign_EC_KEY(pkey, ec); | |
446 | return 1; | |
447 | } | |
e4263314 DSH |
448 | |
449 | static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
450 | { |
451 | return i2d_ECPrivateKey(pkey->pkey.ec, pder); | |
452 | } | |
e4263314 | 453 | |
492a9e24 | 454 | static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
0f113f3e MC |
455 | { |
456 | switch (op) { | |
457 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
458 | if (arg1 == 0) { | |
459 | int snid, hnid; | |
460 | X509_ALGOR *alg1, *alg2; | |
461 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); | |
462 | if (alg1 == NULL || alg1->algorithm == NULL) | |
463 | return -1; | |
464 | hnid = OBJ_obj2nid(alg1->algorithm); | |
465 | if (hnid == NID_undef) | |
466 | return -1; | |
467 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
468 | return -1; | |
469 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
470 | } | |
471 | return 1; | |
8931b30d | 472 | #ifndef OPENSSL_NO_CMS |
0f113f3e MC |
473 | case ASN1_PKEY_CTRL_CMS_SIGN: |
474 | if (arg1 == 0) { | |
475 | int snid, hnid; | |
476 | X509_ALGOR *alg1, *alg2; | |
477 | CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); | |
478 | if (alg1 == NULL || alg1->algorithm == NULL) | |
479 | return -1; | |
480 | hnid = OBJ_obj2nid(alg1->algorithm); | |
481 | if (hnid == NID_undef) | |
482 | return -1; | |
483 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
484 | return -1; | |
485 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
486 | } | |
487 | return 1; | |
488 | ||
489 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
490 | if (arg1 == 1) | |
491 | return ecdh_cms_decrypt(arg2); | |
492 | else if (arg1 == 0) | |
493 | return ecdh_cms_encrypt(arg2); | |
494 | return -2; | |
495 | ||
496 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
497 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
498 | return 1; | |
8931b30d | 499 | #endif |
492a9e24 | 500 | |
0f113f3e MC |
501 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
502 | *(int *)arg2 = NID_sha256; | |
503 | return 2; | |
492a9e24 | 504 | |
3bca6c27 DSH |
505 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: |
506 | return EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(pkey), arg2, arg1, NULL); | |
507 | ||
508 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
509 | return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey), | |
510 | POINT_CONVERSION_UNCOMPRESSED, arg2, NULL); | |
511 | ||
0f113f3e MC |
512 | default: |
513 | return -2; | |
6f81892e | 514 | |
0f113f3e | 515 | } |
6f81892e | 516 | |
0f113f3e | 517 | } |
6f81892e | 518 | |
0f113f3e MC |
519 | const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = { |
520 | EVP_PKEY_EC, | |
521 | EVP_PKEY_EC, | |
522 | 0, | |
523 | "EC", | |
524 | "OpenSSL EC algorithm", | |
525 | ||
526 | eckey_pub_decode, | |
527 | eckey_pub_encode, | |
528 | eckey_pub_cmp, | |
529 | eckey_pub_print, | |
530 | ||
531 | eckey_priv_decode, | |
532 | eckey_priv_encode, | |
533 | eckey_priv_print, | |
534 | ||
535 | int_ec_size, | |
536 | ec_bits, | |
537 | ec_security_bits, | |
538 | ||
539 | eckey_param_decode, | |
540 | eckey_param_encode, | |
541 | ec_missing_parameters, | |
542 | ec_copy_parameters, | |
543 | ec_cmp_parameters, | |
544 | eckey_param_print, | |
545 | 0, | |
546 | ||
547 | int_ec_free, | |
548 | ec_pkey_ctrl, | |
549 | old_ec_priv_decode, | |
550 | old_ec_priv_encode | |
551 | }; | |
88e20b85 | 552 | |
dca5eeb4 RS |
553 | int EC_KEY_print(BIO *bp, const EC_KEY *x, int off) |
554 | { | |
555 | int private = EC_KEY_get0_private_key(x) != NULL; | |
556 | ||
557 | return do_EC_KEY_print(bp, x, off, | |
a66069db | 558 | private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC); |
dca5eeb4 RS |
559 | } |
560 | ||
561 | int ECParameters_print(BIO *bp, const EC_KEY *x) | |
562 | { | |
563 | return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM); | |
564 | } | |
565 | ||
88e20b85 DSH |
566 | #ifndef OPENSSL_NO_CMS |
567 | ||
568 | static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
569 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
570 | { | |
ac4e2577 | 571 | const ASN1_OBJECT *aoid; |
0f113f3e | 572 | int atype; |
ac4e2577 | 573 | const void *aval; |
0f113f3e MC |
574 | int rv = 0; |
575 | EVP_PKEY *pkpeer = NULL; | |
576 | EC_KEY *ecpeer = NULL; | |
577 | const unsigned char *p; | |
578 | int plen; | |
579 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
580 | if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey) | |
581 | goto err; | |
582 | /* If absent parameters get group from main key */ | |
583 | if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) { | |
584 | const EC_GROUP *grp; | |
585 | EVP_PKEY *pk; | |
586 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
587 | if (!pk) | |
588 | goto err; | |
589 | grp = EC_KEY_get0_group(pk->pkey.ec); | |
590 | ecpeer = EC_KEY_new(); | |
90945fa3 | 591 | if (ecpeer == NULL) |
0f113f3e MC |
592 | goto err; |
593 | if (!EC_KEY_set_group(ecpeer, grp)) | |
594 | goto err; | |
595 | } else { | |
596 | ecpeer = eckey_type2param(atype, aval); | |
597 | if (!ecpeer) | |
598 | goto err; | |
599 | } | |
600 | /* We have parameters now set public key */ | |
601 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 602 | p = ASN1_STRING_get0_data(pubkey); |
0f113f3e MC |
603 | if (!p || !plen) |
604 | goto err; | |
605 | if (!o2i_ECPublicKey(&ecpeer, &p, plen)) | |
606 | goto err; | |
607 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 608 | if (pkpeer == NULL) |
0f113f3e MC |
609 | goto err; |
610 | EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer); | |
611 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
612 | rv = 1; | |
613 | err: | |
8fdc3734 | 614 | EC_KEY_free(ecpeer); |
c5ba2d99 | 615 | EVP_PKEY_free(pkpeer); |
0f113f3e MC |
616 | return rv; |
617 | } | |
618 | ||
88e20b85 DSH |
619 | /* Set KDF parameters based on KDF NID */ |
620 | static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid) | |
0f113f3e MC |
621 | { |
622 | int kdf_nid, kdfmd_nid, cofactor; | |
623 | const EVP_MD *kdf_md; | |
624 | if (eckdf_nid == NID_undef) | |
625 | return 0; | |
626 | ||
627 | /* Lookup KDF type, cofactor mode and digest */ | |
628 | if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid)) | |
629 | return 0; | |
630 | ||
631 | if (kdf_nid == NID_dh_std_kdf) | |
632 | cofactor = 0; | |
633 | else if (kdf_nid == NID_dh_cofactor_kdf) | |
634 | cofactor = 1; | |
635 | else | |
636 | return 0; | |
637 | ||
638 | if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0) | |
639 | return 0; | |
640 | ||
641 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_62) <= 0) | |
642 | return 0; | |
643 | ||
644 | kdf_md = EVP_get_digestbynid(kdfmd_nid); | |
645 | if (!kdf_md) | |
646 | return 0; | |
647 | ||
648 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
649 | return 0; | |
650 | return 1; | |
651 | } | |
88e20b85 | 652 | |
88e20b85 | 653 | static int ecdh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) |
0f113f3e MC |
654 | { |
655 | int rv = 0; | |
656 | ||
657 | X509_ALGOR *alg, *kekalg = NULL; | |
658 | ASN1_OCTET_STRING *ukm; | |
659 | const unsigned char *p; | |
660 | unsigned char *der = NULL; | |
661 | int plen, keylen; | |
662 | const EVP_CIPHER *kekcipher; | |
663 | EVP_CIPHER_CTX *kekctx; | |
664 | ||
665 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
666 | return 0; | |
667 | ||
668 | if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm))) { | |
669 | ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR); | |
670 | return 0; | |
671 | } | |
672 | ||
673 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
674 | return 0; | |
675 | ||
676 | p = alg->parameter->value.sequence->data; | |
677 | plen = alg->parameter->value.sequence->length; | |
678 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
679 | if (!kekalg) | |
680 | goto err; | |
681 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
682 | if (!kekctx) | |
683 | goto err; | |
684 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
685 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
686 | goto err; | |
687 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
688 | goto err; | |
689 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
690 | goto err; | |
691 | ||
692 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
693 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
694 | goto err; | |
695 | ||
696 | plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen); | |
697 | ||
698 | if (!plen) | |
699 | goto err; | |
700 | ||
701 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0) | |
702 | goto err; | |
703 | der = NULL; | |
704 | ||
705 | rv = 1; | |
706 | err: | |
222561fe RS |
707 | X509_ALGOR_free(kekalg); |
708 | OPENSSL_free(der); | |
0f113f3e MC |
709 | return rv; |
710 | } | |
88e20b85 DSH |
711 | |
712 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
713 | { |
714 | EVP_PKEY_CTX *pctx; | |
715 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
716 | if (!pctx) | |
717 | return 0; | |
718 | /* See if we need to set peer key */ | |
719 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
720 | X509_ALGOR *alg; | |
721 | ASN1_BIT_STRING *pubkey; | |
722 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
723 | NULL, NULL, NULL)) | |
724 | return 0; | |
725 | if (!alg || !pubkey) | |
726 | return 0; | |
727 | if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) { | |
728 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR); | |
729 | return 0; | |
730 | } | |
731 | } | |
732 | /* Set ECDH derivation parameters and initialise unwrap context */ | |
733 | if (!ecdh_cms_set_shared_info(pctx, ri)) { | |
734 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR); | |
735 | return 0; | |
736 | } | |
737 | return 1; | |
738 | } | |
88e20b85 DSH |
739 | |
740 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
741 | { |
742 | EVP_PKEY_CTX *pctx; | |
743 | EVP_PKEY *pkey; | |
744 | EVP_CIPHER_CTX *ctx; | |
745 | int keylen; | |
746 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 747 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
748 | ASN1_BIT_STRING *pubkey; |
749 | ASN1_STRING *wrap_str; | |
750 | ASN1_OCTET_STRING *ukm; | |
751 | unsigned char *penc = NULL; | |
752 | int penclen; | |
753 | int rv = 0; | |
754 | int ecdh_nid, kdf_type, kdf_nid, wrap_nid; | |
755 | const EVP_MD *kdf_md; | |
756 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
757 | if (!pctx) | |
758 | return 0; | |
759 | /* Get ephemeral key */ | |
760 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
761 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
762 | NULL, NULL, NULL)) | |
763 | goto err; | |
764 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
765 | /* Is everything uninitialised? */ | |
766 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
767 | ||
768 | EC_KEY *eckey = pkey->pkey.ec; | |
769 | /* Set the key */ | |
770 | unsigned char *p; | |
771 | ||
772 | penclen = i2o_ECPublicKey(eckey, NULL); | |
773 | if (penclen <= 0) | |
774 | goto err; | |
775 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 776 | if (penc == NULL) |
0f113f3e MC |
777 | goto err; |
778 | p = penc; | |
779 | penclen = i2o_ECPublicKey(eckey, &p); | |
780 | if (penclen <= 0) | |
781 | goto err; | |
782 | ASN1_STRING_set0(pubkey, penc, penclen); | |
783 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
784 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
785 | ||
786 | penc = NULL; | |
787 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), | |
788 | V_ASN1_UNDEF, NULL); | |
789 | } | |
790 | ||
0d4fb843 | 791 | /* See if custom parameters set */ |
0f113f3e MC |
792 | kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx); |
793 | if (kdf_type <= 0) | |
794 | goto err; | |
795 | if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md)) | |
796 | goto err; | |
797 | ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx); | |
798 | if (ecdh_nid < 0) | |
799 | goto err; | |
800 | else if (ecdh_nid == 0) | |
801 | ecdh_nid = NID_dh_std_kdf; | |
802 | else if (ecdh_nid == 1) | |
803 | ecdh_nid = NID_dh_cofactor_kdf; | |
804 | ||
805 | if (kdf_type == EVP_PKEY_ECDH_KDF_NONE) { | |
806 | kdf_type = EVP_PKEY_ECDH_KDF_X9_62; | |
807 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0) | |
808 | goto err; | |
809 | } else | |
0d4fb843 | 810 | /* Unknown KDF */ |
0f113f3e MC |
811 | goto err; |
812 | if (kdf_md == NULL) { | |
813 | /* Fixme later for better MD */ | |
814 | kdf_md = EVP_sha1(); | |
815 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
816 | goto err; | |
817 | } | |
818 | ||
819 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
820 | goto err; | |
821 | ||
822 | /* Lookup NID for KDF+cofactor+digest */ | |
823 | ||
824 | if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid)) | |
825 | goto err; | |
826 | /* Get wrap NID */ | |
827 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
828 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
829 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
830 | ||
831 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
832 | ||
833 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 834 | if (wrap_alg == NULL) |
0f113f3e MC |
835 | goto err; |
836 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
837 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 838 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
839 | goto err; |
840 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
841 | goto err; | |
842 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
843 | ASN1_TYPE_free(wrap_alg->parameter); | |
844 | wrap_alg->parameter = NULL; | |
845 | } | |
846 | ||
847 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
848 | goto err; | |
849 | ||
850 | penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen); | |
851 | ||
852 | if (!penclen) | |
853 | goto err; | |
854 | ||
855 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0) | |
856 | goto err; | |
857 | penc = NULL; | |
858 | ||
859 | /* | |
860 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
861 | * of another AlgorithmIdentifier. | |
862 | */ | |
863 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
864 | if (!penc || !penclen) | |
865 | goto err; | |
866 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 867 | if (wrap_str == NULL) |
0f113f3e MC |
868 | goto err; |
869 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
870 | penc = NULL; | |
871 | X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str); | |
872 | ||
873 | rv = 1; | |
874 | ||
875 | err: | |
222561fe RS |
876 | OPENSSL_free(penc); |
877 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
878 | return rv; |
879 | } | |
88e20b85 DSH |
880 | |
881 | #endif |