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Commit | Line | Data |
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0f113f3e | 1 | /* |
fd38836b | 2 | * Copyright 2006-2018 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; | |
037241bf RS |
95 | EC_GROUP *group = NULL; |
96 | ||
0f113f3e | 97 | if (ptype == V_ASN1_SEQUENCE) { |
ac4e2577 | 98 | const ASN1_STRING *pstr = pval; |
037241bf RS |
99 | const unsigned char *pm = pstr->data; |
100 | int pmlen = pstr->length; | |
101 | ||
75ebbd9a | 102 | if ((eckey = d2i_ECParameters(NULL, &pm, pmlen)) == NULL) { |
0f113f3e MC |
103 | ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); |
104 | goto ecerr; | |
105 | } | |
106 | } else if (ptype == V_ASN1_OBJECT) { | |
ac4e2577 | 107 | const ASN1_OBJECT *poid = pval; |
0f113f3e MC |
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); |
037241bf | 132 | EC_GROUP_free(group); |
0f113f3e MC |
133 | return NULL; |
134 | } | |
448be743 DSH |
135 | |
136 | static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
0f113f3e MC |
137 | { |
138 | const unsigned char *p = NULL; | |
ac4e2577 | 139 | const void *pval; |
0f113f3e MC |
140 | int ptype, pklen; |
141 | EC_KEY *eckey = NULL; | |
142 | X509_ALGOR *palg; | |
143 | ||
144 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
145 | return 0; | |
146 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
147 | ||
148 | eckey = eckey_type2param(ptype, pval); | |
149 | ||
150 | if (!eckey) { | |
151 | ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB); | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* We have parameters now set public key */ | |
156 | if (!o2i_ECPublicKey(&eckey, &p, pklen)) { | |
157 | ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR); | |
158 | goto ecerr; | |
159 | } | |
160 | ||
161 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
162 | return 1; | |
163 | ||
164 | ecerr: | |
8fdc3734 | 165 | EC_KEY_free(eckey); |
0f113f3e MC |
166 | return 0; |
167 | } | |
448be743 | 168 | |
6f81892e | 169 | static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
170 | { |
171 | int r; | |
172 | const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec); | |
173 | const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), | |
174 | *pb = EC_KEY_get0_public_key(b->pkey.ec); | |
978ecbb0 DW |
175 | if (group == NULL || pa == NULL || pb == NULL) |
176 | return -2; | |
0f113f3e MC |
177 | r = EC_POINT_cmp(group, pa, pb, NULL); |
178 | if (r == 0) | |
179 | return 1; | |
180 | if (r == 1) | |
181 | return 0; | |
182 | return -2; | |
183 | } | |
6f81892e | 184 | |
245c6bc3 | 185 | static int eckey_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
186 | { |
187 | const unsigned char *p = NULL; | |
ac4e2577 | 188 | const void *pval; |
0f113f3e MC |
189 | int ptype, pklen; |
190 | EC_KEY *eckey = NULL; | |
245c6bc3 | 191 | const X509_ALGOR *palg; |
0f113f3e MC |
192 | |
193 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
194 | return 0; | |
195 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
196 | ||
197 | eckey = eckey_type2param(ptype, pval); | |
198 | ||
199 | if (!eckey) | |
200 | goto ecliberr; | |
201 | ||
202 | /* We have parameters now set private key */ | |
203 | if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { | |
204 | ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR); | |
205 | goto ecerr; | |
206 | } | |
207 | ||
0f113f3e MC |
208 | EVP_PKEY_assign_EC_KEY(pkey, eckey); |
209 | return 1; | |
210 | ||
211 | ecliberr: | |
212 | ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); | |
213 | ecerr: | |
8fdc3734 | 214 | EC_KEY_free(eckey); |
0f113f3e MC |
215 | return 0; |
216 | } | |
448be743 | 217 | |
6f81892e | 218 | static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
448be743 | 219 | { |
b8a7bd83 | 220 | EC_KEY ec_key = *(pkey->pkey.ec); |
0f113f3e MC |
221 | unsigned char *ep, *p; |
222 | int eplen, ptype; | |
223 | void *pval; | |
b8a7bd83 | 224 | unsigned int old_flags; |
0f113f3e | 225 | |
b8a7bd83 | 226 | if (!eckey_param2type(&ptype, &pval, &ec_key)) { |
0f113f3e MC |
227 | ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR); |
228 | return 0; | |
229 | } | |
230 | ||
231 | /* set the private key */ | |
232 | ||
233 | /* | |
234 | * do not include the parameters in the SEC1 private key see PKCS#11 | |
235 | * 12.11 | |
236 | */ | |
b8a7bd83 RL |
237 | old_flags = EC_KEY_get_enc_flags(&ec_key); |
238 | EC_KEY_set_enc_flags(&ec_key, old_flags | EC_PKEY_NO_PARAMETERS); | |
239 | ||
240 | eplen = i2d_ECPrivateKey(&ec_key, NULL); | |
0f113f3e | 241 | if (!eplen) { |
0f113f3e MC |
242 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); |
243 | return 0; | |
244 | } | |
b196e7d9 | 245 | ep = OPENSSL_malloc(eplen); |
90945fa3 | 246 | if (ep == NULL) { |
0f113f3e MC |
247 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
248 | return 0; | |
249 | } | |
250 | p = ep; | |
b8a7bd83 | 251 | if (!i2d_ECPrivateKey(&ec_key, &p)) { |
0f113f3e MC |
252 | OPENSSL_free(ep); |
253 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); | |
254 | return 0; | |
255 | } | |
0f113f3e MC |
256 | |
257 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0, | |
e0670973 Y |
258 | ptype, pval, ep, eplen)) { |
259 | OPENSSL_free(ep); | |
0f113f3e | 260 | return 0; |
e0670973 | 261 | } |
0f113f3e MC |
262 | |
263 | return 1; | |
448be743 DSH |
264 | } |
265 | ||
6f81892e | 266 | static int int_ec_size(const EVP_PKEY *pkey) |
0f113f3e MC |
267 | { |
268 | return ECDSA_size(pkey->pkey.ec); | |
269 | } | |
6f81892e DSH |
270 | |
271 | static int ec_bits(const EVP_PKEY *pkey) | |
0f113f3e | 272 | { |
be2e334f | 273 | return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec)); |
0f113f3e | 274 | } |
6f81892e | 275 | |
2514fa79 | 276 | static int ec_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
277 | { |
278 | int ecbits = ec_bits(pkey); | |
279 | if (ecbits >= 512) | |
280 | return 256; | |
281 | if (ecbits >= 384) | |
282 | return 192; | |
283 | if (ecbits >= 256) | |
284 | return 128; | |
285 | if (ecbits >= 224) | |
286 | return 112; | |
287 | if (ecbits >= 160) | |
288 | return 80; | |
289 | return ecbits / 2; | |
290 | } | |
2514fa79 | 291 | |
6f81892e | 292 | static int ec_missing_parameters(const EVP_PKEY *pkey) |
0f113f3e | 293 | { |
f72f00d4 | 294 | if (pkey->pkey.ec == NULL || EC_KEY_get0_group(pkey->pkey.ec) == NULL) |
0f113f3e MC |
295 | return 1; |
296 | return 0; | |
297 | } | |
6f81892e | 298 | |
930b0c4b | 299 | static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) |
0f113f3e MC |
300 | { |
301 | EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec)); | |
188a9bd9 | 302 | |
0f113f3e MC |
303 | if (group == NULL) |
304 | return 0; | |
2986ecdc DSH |
305 | if (to->pkey.ec == NULL) { |
306 | to->pkey.ec = EC_KEY_new(); | |
307 | if (to->pkey.ec == NULL) | |
188a9bd9 | 308 | goto err; |
2986ecdc | 309 | } |
0f113f3e | 310 | if (EC_KEY_set_group(to->pkey.ec, group) == 0) |
188a9bd9 | 311 | goto err; |
0f113f3e MC |
312 | EC_GROUP_free(group); |
313 | return 1; | |
188a9bd9 BE |
314 | err: |
315 | EC_GROUP_free(group); | |
316 | return 0; | |
0f113f3e | 317 | } |
6f81892e | 318 | |
930b0c4b | 319 | static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
320 | { |
321 | const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), | |
322 | *group_b = EC_KEY_get0_group(b->pkey.ec); | |
978ecbb0 DW |
323 | if (group_a == NULL || group_b == NULL) |
324 | return -2; | |
0f113f3e MC |
325 | if (EC_GROUP_cmp(group_a, group_b, NULL)) |
326 | return 0; | |
327 | else | |
328 | return 1; | |
329 | } | |
6f81892e DSH |
330 | |
331 | static void int_ec_free(EVP_PKEY *pkey) | |
0f113f3e MC |
332 | { |
333 | EC_KEY_free(pkey->pkey.ec); | |
334 | } | |
6f81892e | 335 | |
d6755bb6 DSH |
336 | typedef enum { |
337 | EC_KEY_PRINT_PRIVATE, | |
338 | EC_KEY_PRINT_PUBLIC, | |
339 | EC_KEY_PRINT_PARAM | |
340 | } ec_print_t; | |
341 | ||
342 | static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, ec_print_t ktype) | |
0f113f3e | 343 | { |
0f113f3e | 344 | const char *ecstr; |
7fc7d1a7 DSH |
345 | unsigned char *priv = NULL, *pub = NULL; |
346 | size_t privlen = 0, publen = 0; | |
347 | int ret = 0; | |
0f113f3e | 348 | const EC_GROUP *group; |
0f113f3e MC |
349 | |
350 | if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) { | |
7fc7d1a7 DSH |
351 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_PASSED_NULL_PARAMETER); |
352 | return 0; | |
0f113f3e MC |
353 | } |
354 | ||
82f52631 | 355 | if (ktype != EC_KEY_PRINT_PARAM && EC_KEY_get0_public_key(x) != NULL) { |
7fc7d1a7 DSH |
356 | publen = EC_KEY_key2buf(x, EC_KEY_get_conv_form(x), &pub, NULL); |
357 | if (publen == 0) | |
358 | goto err; | |
0f113f3e MC |
359 | } |
360 | ||
d6755bb6 | 361 | if (ktype == EC_KEY_PRINT_PRIVATE && EC_KEY_get0_private_key(x) != NULL) { |
7fc7d1a7 DSH |
362 | privlen = EC_KEY_priv2buf(x, &priv); |
363 | if (privlen == 0) | |
d810700b | 364 | goto err; |
d810700b | 365 | } |
0f113f3e | 366 | |
d6755bb6 | 367 | if (ktype == EC_KEY_PRINT_PRIVATE) |
0f113f3e | 368 | ecstr = "Private-Key"; |
d6755bb6 | 369 | else if (ktype == EC_KEY_PRINT_PUBLIC) |
0f113f3e MC |
370 | ecstr = "Public-Key"; |
371 | else | |
372 | ecstr = "ECDSA-Parameters"; | |
373 | ||
374 | if (!BIO_indent(bp, off, 128)) | |
375 | goto err; | |
be2e334f DSH |
376 | if (BIO_printf(bp, "%s: (%d bit)\n", ecstr, |
377 | EC_GROUP_order_bits(group)) <= 0) | |
0f113f3e MC |
378 | goto err; |
379 | ||
7fc7d1a7 | 380 | if (privlen != 0) { |
d810700b DSH |
381 | if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0) |
382 | goto err; | |
7fc7d1a7 | 383 | if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0) |
d810700b DSH |
384 | goto err; |
385 | } | |
386 | ||
7fc7d1a7 | 387 | if (publen != 0) { |
d810700b DSH |
388 | if (BIO_printf(bp, "%*spub:\n", off, "") <= 0) |
389 | goto err; | |
7fc7d1a7 | 390 | if (ASN1_buf_print(bp, pub, publen, off + 4) == 0) |
d810700b DSH |
391 | goto err; |
392 | } | |
393 | ||
0f113f3e MC |
394 | if (!ECPKParameters_print(bp, group, off)) |
395 | goto err; | |
396 | ret = 1; | |
397 | err: | |
398 | if (!ret) | |
7fc7d1a7 DSH |
399 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_EC_LIB); |
400 | OPENSSL_clear_free(priv, privlen); | |
401 | OPENSSL_free(pub); | |
d810700b | 402 | return ret; |
0f113f3e | 403 | } |
35208f36 | 404 | |
3e4585c8 | 405 | static int eckey_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
406 | const unsigned char **pder, int derlen) |
407 | { | |
408 | EC_KEY *eckey; | |
75ebbd9a RS |
409 | |
410 | if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
411 | ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB); |
412 | return 0; | |
413 | } | |
414 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
415 | return 1; | |
416 | } | |
3e4585c8 DSH |
417 | |
418 | static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
419 | { |
420 | return i2d_ECParameters(pkey->pkey.ec, pder); | |
421 | } | |
3e4585c8 | 422 | |
35208f36 | 423 | static int eckey_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, |
0f113f3e MC |
424 | ASN1_PCTX *ctx) |
425 | { | |
d6755bb6 | 426 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PARAM); |
0f113f3e | 427 | } |
35208f36 DSH |
428 | |
429 | static int eckey_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
430 | ASN1_PCTX *ctx) |
431 | { | |
d6755bb6 | 432 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PUBLIC); |
0f113f3e | 433 | } |
35208f36 DSH |
434 | |
435 | static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
436 | ASN1_PCTX *ctx) |
437 | { | |
d6755bb6 | 438 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE); |
0f113f3e | 439 | } |
35208f36 | 440 | |
e4263314 | 441 | static int old_ec_priv_decode(EVP_PKEY *pkey, |
0f113f3e MC |
442 | const unsigned char **pder, int derlen) |
443 | { | |
444 | EC_KEY *ec; | |
75ebbd9a RS |
445 | |
446 | if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
447 | ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR); |
448 | return 0; | |
449 | } | |
450 | EVP_PKEY_assign_EC_KEY(pkey, ec); | |
451 | return 1; | |
452 | } | |
e4263314 DSH |
453 | |
454 | static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
455 | { |
456 | return i2d_ECPrivateKey(pkey->pkey.ec, pder); | |
457 | } | |
e4263314 | 458 | |
492a9e24 | 459 | static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
0f113f3e MC |
460 | { |
461 | switch (op) { | |
462 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
463 | if (arg1 == 0) { | |
464 | int snid, hnid; | |
465 | X509_ALGOR *alg1, *alg2; | |
466 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); | |
467 | if (alg1 == NULL || alg1->algorithm == NULL) | |
468 | return -1; | |
469 | hnid = OBJ_obj2nid(alg1->algorithm); | |
470 | if (hnid == NID_undef) | |
471 | return -1; | |
472 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
473 | return -1; | |
474 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
475 | } | |
476 | return 1; | |
8931b30d | 477 | #ifndef OPENSSL_NO_CMS |
0f113f3e MC |
478 | case ASN1_PKEY_CTRL_CMS_SIGN: |
479 | if (arg1 == 0) { | |
480 | int snid, hnid; | |
481 | X509_ALGOR *alg1, *alg2; | |
482 | CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); | |
483 | if (alg1 == NULL || alg1->algorithm == NULL) | |
484 | return -1; | |
485 | hnid = OBJ_obj2nid(alg1->algorithm); | |
486 | if (hnid == NID_undef) | |
487 | return -1; | |
488 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
489 | return -1; | |
490 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
491 | } | |
492 | return 1; | |
493 | ||
494 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
495 | if (arg1 == 1) | |
496 | return ecdh_cms_decrypt(arg2); | |
497 | else if (arg1 == 0) | |
498 | return ecdh_cms_encrypt(arg2); | |
499 | return -2; | |
500 | ||
501 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
502 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
503 | return 1; | |
8931b30d | 504 | #endif |
492a9e24 | 505 | |
0f113f3e MC |
506 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
507 | *(int *)arg2 = NID_sha256; | |
508 | return 2; | |
492a9e24 | 509 | |
3bca6c27 DSH |
510 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: |
511 | return EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(pkey), arg2, arg1, NULL); | |
512 | ||
513 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
514 | return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey), | |
515 | POINT_CONVERSION_UNCOMPRESSED, arg2, NULL); | |
516 | ||
0f113f3e MC |
517 | default: |
518 | return -2; | |
6f81892e | 519 | |
0f113f3e | 520 | } |
6f81892e | 521 | |
0f113f3e | 522 | } |
6f81892e | 523 | |
2aee35d3 PY |
524 | static int ec_pkey_check(const EVP_PKEY *pkey) |
525 | { | |
526 | EC_KEY *eckey = pkey->pkey.ec; | |
527 | ||
528 | /* stay consistent to what EVP_PKEY_check demands */ | |
529 | if (eckey->priv_key == NULL) { | |
6807b84e | 530 | ECerr(EC_F_EC_PKEY_CHECK, EC_R_MISSING_PRIVATE_KEY); |
2aee35d3 PY |
531 | return 0; |
532 | } | |
533 | ||
534 | return EC_KEY_check_key(eckey); | |
535 | } | |
536 | ||
b0004708 PY |
537 | static int ec_pkey_public_check(const EVP_PKEY *pkey) |
538 | { | |
539 | EC_KEY *eckey = pkey->pkey.ec; | |
540 | ||
541 | /* | |
542 | * Note: it unnecessary to check eckey->pub_key here since | |
543 | * it will be checked in EC_KEY_check_key(). In fact, the | |
544 | * EC_KEY_check_key() mainly checks the public key, and checks | |
545 | * the private key optionally (only if there is one). So if | |
546 | * someone passes a whole EC key (public + private), this | |
547 | * will also work... | |
548 | */ | |
549 | ||
550 | return EC_KEY_check_key(eckey); | |
551 | } | |
552 | ||
553 | static int ec_pkey_param_check(const EVP_PKEY *pkey) | |
554 | { | |
555 | EC_KEY *eckey = pkey->pkey.ec; | |
556 | ||
557 | /* stay consistent to what EVP_PKEY_check demands */ | |
558 | if (eckey->group == NULL) { | |
559 | ECerr(EC_F_EC_PKEY_PARAM_CHECK, EC_R_MISSING_PARAMETERS); | |
560 | return 0; | |
561 | } | |
562 | ||
563 | return EC_GROUP_check(eckey->group, NULL); | |
564 | } | |
565 | ||
0f113f3e MC |
566 | const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = { |
567 | EVP_PKEY_EC, | |
568 | EVP_PKEY_EC, | |
569 | 0, | |
570 | "EC", | |
571 | "OpenSSL EC algorithm", | |
572 | ||
573 | eckey_pub_decode, | |
574 | eckey_pub_encode, | |
575 | eckey_pub_cmp, | |
576 | eckey_pub_print, | |
577 | ||
578 | eckey_priv_decode, | |
579 | eckey_priv_encode, | |
580 | eckey_priv_print, | |
581 | ||
582 | int_ec_size, | |
583 | ec_bits, | |
584 | ec_security_bits, | |
585 | ||
586 | eckey_param_decode, | |
587 | eckey_param_encode, | |
588 | ec_missing_parameters, | |
589 | ec_copy_parameters, | |
590 | ec_cmp_parameters, | |
591 | eckey_param_print, | |
592 | 0, | |
593 | ||
594 | int_ec_free, | |
595 | ec_pkey_ctrl, | |
596 | old_ec_priv_decode, | |
2aee35d3 PY |
597 | old_ec_priv_encode, |
598 | ||
599 | 0, 0, 0, | |
600 | ||
b0004708 PY |
601 | ec_pkey_check, |
602 | ec_pkey_public_check, | |
603 | ec_pkey_param_check | |
0f113f3e | 604 | }; |
88e20b85 | 605 | |
ddb634fe JL |
606 | #if !defined(OPENSSL_NO_SM2) |
607 | const EVP_PKEY_ASN1_METHOD sm2_asn1_meth = { | |
608 | EVP_PKEY_SM2, | |
609 | EVP_PKEY_EC, | |
610 | ASN1_PKEY_ALIAS | |
611 | }; | |
612 | #endif | |
613 | ||
dca5eeb4 RS |
614 | int EC_KEY_print(BIO *bp, const EC_KEY *x, int off) |
615 | { | |
616 | int private = EC_KEY_get0_private_key(x) != NULL; | |
617 | ||
618 | return do_EC_KEY_print(bp, x, off, | |
a66069db | 619 | private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC); |
dca5eeb4 RS |
620 | } |
621 | ||
622 | int ECParameters_print(BIO *bp, const EC_KEY *x) | |
623 | { | |
624 | return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM); | |
625 | } | |
626 | ||
88e20b85 DSH |
627 | #ifndef OPENSSL_NO_CMS |
628 | ||
629 | static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
630 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
631 | { | |
ac4e2577 | 632 | const ASN1_OBJECT *aoid; |
0f113f3e | 633 | int atype; |
ac4e2577 | 634 | const void *aval; |
0f113f3e MC |
635 | int rv = 0; |
636 | EVP_PKEY *pkpeer = NULL; | |
637 | EC_KEY *ecpeer = NULL; | |
638 | const unsigned char *p; | |
639 | int plen; | |
640 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
641 | if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey) | |
642 | goto err; | |
643 | /* If absent parameters get group from main key */ | |
644 | if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) { | |
645 | const EC_GROUP *grp; | |
646 | EVP_PKEY *pk; | |
647 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
648 | if (!pk) | |
649 | goto err; | |
650 | grp = EC_KEY_get0_group(pk->pkey.ec); | |
651 | ecpeer = EC_KEY_new(); | |
90945fa3 | 652 | if (ecpeer == NULL) |
0f113f3e MC |
653 | goto err; |
654 | if (!EC_KEY_set_group(ecpeer, grp)) | |
655 | goto err; | |
656 | } else { | |
657 | ecpeer = eckey_type2param(atype, aval); | |
658 | if (!ecpeer) | |
659 | goto err; | |
660 | } | |
661 | /* We have parameters now set public key */ | |
662 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 663 | p = ASN1_STRING_get0_data(pubkey); |
0f113f3e MC |
664 | if (!p || !plen) |
665 | goto err; | |
666 | if (!o2i_ECPublicKey(&ecpeer, &p, plen)) | |
667 | goto err; | |
668 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 669 | if (pkpeer == NULL) |
0f113f3e MC |
670 | goto err; |
671 | EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer); | |
672 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
673 | rv = 1; | |
674 | err: | |
8fdc3734 | 675 | EC_KEY_free(ecpeer); |
c5ba2d99 | 676 | EVP_PKEY_free(pkpeer); |
0f113f3e MC |
677 | return rv; |
678 | } | |
679 | ||
88e20b85 DSH |
680 | /* Set KDF parameters based on KDF NID */ |
681 | static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid) | |
0f113f3e MC |
682 | { |
683 | int kdf_nid, kdfmd_nid, cofactor; | |
684 | const EVP_MD *kdf_md; | |
685 | if (eckdf_nid == NID_undef) | |
686 | return 0; | |
687 | ||
688 | /* Lookup KDF type, cofactor mode and digest */ | |
689 | if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid)) | |
690 | return 0; | |
691 | ||
692 | if (kdf_nid == NID_dh_std_kdf) | |
693 | cofactor = 0; | |
694 | else if (kdf_nid == NID_dh_cofactor_kdf) | |
695 | cofactor = 1; | |
696 | else | |
697 | return 0; | |
698 | ||
699 | if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0) | |
700 | return 0; | |
701 | ||
ffd89124 | 702 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_63) <= 0) |
0f113f3e MC |
703 | return 0; |
704 | ||
705 | kdf_md = EVP_get_digestbynid(kdfmd_nid); | |
706 | if (!kdf_md) | |
707 | return 0; | |
708 | ||
709 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
710 | return 0; | |
711 | return 1; | |
712 | } | |
88e20b85 | 713 | |
88e20b85 | 714 | static int ecdh_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 *der = NULL; | |
722 | int plen, keylen; | |
723 | const EVP_CIPHER *kekcipher; | |
724 | EVP_CIPHER_CTX *kekctx; | |
725 | ||
726 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
727 | return 0; | |
728 | ||
729 | if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm))) { | |
730 | ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
735 | return 0; | |
736 | ||
737 | p = alg->parameter->value.sequence->data; | |
738 | plen = alg->parameter->value.sequence->length; | |
739 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
740 | if (!kekalg) | |
741 | goto err; | |
742 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
743 | if (!kekctx) | |
744 | goto err; | |
745 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
746 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
747 | goto err; | |
748 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
749 | goto err; | |
750 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
751 | goto err; | |
752 | ||
753 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
754 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
755 | goto err; | |
756 | ||
757 | plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen); | |
758 | ||
759 | if (!plen) | |
760 | goto err; | |
761 | ||
762 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0) | |
763 | goto err; | |
764 | der = NULL; | |
765 | ||
766 | rv = 1; | |
767 | err: | |
222561fe RS |
768 | X509_ALGOR_free(kekalg); |
769 | OPENSSL_free(der); | |
0f113f3e MC |
770 | return rv; |
771 | } | |
88e20b85 DSH |
772 | |
773 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
774 | { |
775 | EVP_PKEY_CTX *pctx; | |
776 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
777 | if (!pctx) | |
778 | return 0; | |
779 | /* See if we need to set peer key */ | |
780 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
781 | X509_ALGOR *alg; | |
782 | ASN1_BIT_STRING *pubkey; | |
783 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
784 | NULL, NULL, NULL)) | |
785 | return 0; | |
786 | if (!alg || !pubkey) | |
787 | return 0; | |
788 | if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) { | |
789 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR); | |
790 | return 0; | |
791 | } | |
792 | } | |
793 | /* Set ECDH derivation parameters and initialise unwrap context */ | |
794 | if (!ecdh_cms_set_shared_info(pctx, ri)) { | |
795 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR); | |
796 | return 0; | |
797 | } | |
798 | return 1; | |
799 | } | |
88e20b85 DSH |
800 | |
801 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
802 | { |
803 | EVP_PKEY_CTX *pctx; | |
804 | EVP_PKEY *pkey; | |
805 | EVP_CIPHER_CTX *ctx; | |
806 | int keylen; | |
807 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 808 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
809 | ASN1_BIT_STRING *pubkey; |
810 | ASN1_STRING *wrap_str; | |
811 | ASN1_OCTET_STRING *ukm; | |
812 | unsigned char *penc = NULL; | |
813 | int penclen; | |
814 | int rv = 0; | |
815 | int ecdh_nid, kdf_type, kdf_nid, wrap_nid; | |
816 | const EVP_MD *kdf_md; | |
817 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
818 | if (!pctx) | |
819 | return 0; | |
820 | /* Get ephemeral key */ | |
821 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
822 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
823 | NULL, NULL, NULL)) | |
824 | goto err; | |
825 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
826 | /* Is everything uninitialised? */ | |
827 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
828 | ||
829 | EC_KEY *eckey = pkey->pkey.ec; | |
830 | /* Set the key */ | |
831 | unsigned char *p; | |
832 | ||
833 | penclen = i2o_ECPublicKey(eckey, NULL); | |
834 | if (penclen <= 0) | |
835 | goto err; | |
836 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 837 | if (penc == NULL) |
0f113f3e MC |
838 | goto err; |
839 | p = penc; | |
840 | penclen = i2o_ECPublicKey(eckey, &p); | |
841 | if (penclen <= 0) | |
842 | goto err; | |
843 | ASN1_STRING_set0(pubkey, penc, penclen); | |
844 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
845 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
846 | ||
847 | penc = NULL; | |
848 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), | |
849 | V_ASN1_UNDEF, NULL); | |
850 | } | |
851 | ||
0d4fb843 | 852 | /* See if custom parameters set */ |
0f113f3e MC |
853 | kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx); |
854 | if (kdf_type <= 0) | |
855 | goto err; | |
856 | if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md)) | |
857 | goto err; | |
858 | ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx); | |
859 | if (ecdh_nid < 0) | |
860 | goto err; | |
861 | else if (ecdh_nid == 0) | |
862 | ecdh_nid = NID_dh_std_kdf; | |
863 | else if (ecdh_nid == 1) | |
864 | ecdh_nid = NID_dh_cofactor_kdf; | |
865 | ||
866 | if (kdf_type == EVP_PKEY_ECDH_KDF_NONE) { | |
ffd89124 | 867 | kdf_type = EVP_PKEY_ECDH_KDF_X9_63; |
0f113f3e MC |
868 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0) |
869 | goto err; | |
870 | } else | |
0d4fb843 | 871 | /* Unknown KDF */ |
0f113f3e MC |
872 | goto err; |
873 | if (kdf_md == NULL) { | |
874 | /* Fixme later for better MD */ | |
875 | kdf_md = EVP_sha1(); | |
876 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
877 | goto err; | |
878 | } | |
879 | ||
880 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
881 | goto err; | |
882 | ||
883 | /* Lookup NID for KDF+cofactor+digest */ | |
884 | ||
885 | if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid)) | |
886 | goto err; | |
887 | /* Get wrap NID */ | |
888 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
889 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
890 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
891 | ||
892 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
893 | ||
894 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 895 | if (wrap_alg == NULL) |
0f113f3e MC |
896 | goto err; |
897 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
898 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 899 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
900 | goto err; |
901 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
902 | goto err; | |
903 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
904 | ASN1_TYPE_free(wrap_alg->parameter); | |
905 | wrap_alg->parameter = NULL; | |
906 | } | |
907 | ||
908 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
909 | goto err; | |
910 | ||
911 | penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen); | |
912 | ||
913 | if (!penclen) | |
914 | goto err; | |
915 | ||
916 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0) | |
917 | goto err; | |
918 | penc = NULL; | |
919 | ||
920 | /* | |
921 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
922 | * of another AlgorithmIdentifier. | |
923 | */ | |
924 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
925 | if (!penc || !penclen) | |
926 | goto err; | |
927 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 928 | if (wrap_str == NULL) |
0f113f3e MC |
929 | goto err; |
930 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
931 | penc = NULL; | |
932 | X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str); | |
933 | ||
934 | rv = 1; | |
935 | ||
936 | err: | |
222561fe RS |
937 | OPENSSL_free(penc); |
938 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
939 | return rv; |
940 | } | |
88e20b85 DSH |
941 | |
942 | #endif |