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Commit | Line | Data |
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0f113f3e | 1 | /* |
35fd9953 | 2 | * Copyright 2006-2019 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> |
0c994d54 DMSP |
17 | #include "crypto/asn1.h" |
18 | #include "crypto/evp.h" | |
b5acbf91 | 19 | #include "ec_local.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 | 506 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
9c6d536f PY |
507 | if (EVP_PKEY_id(pkey) == EVP_PKEY_SM2) { |
508 | /* For SM2, the only valid digest-alg is SM3 */ | |
509 | *(int *)arg2 = NID_sm3; | |
510 | } else { | |
511 | *(int *)arg2 = NID_sha256; | |
512 | } | |
abaa2311 | 513 | return 1; |
492a9e24 | 514 | |
3bca6c27 DSH |
515 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: |
516 | return EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(pkey), arg2, arg1, NULL); | |
517 | ||
518 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
519 | return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey), | |
520 | POINT_CONVERSION_UNCOMPRESSED, arg2, NULL); | |
521 | ||
0f113f3e MC |
522 | default: |
523 | return -2; | |
6f81892e | 524 | |
0f113f3e | 525 | } |
6f81892e | 526 | |
0f113f3e | 527 | } |
6f81892e | 528 | |
2aee35d3 PY |
529 | static int ec_pkey_check(const EVP_PKEY *pkey) |
530 | { | |
531 | EC_KEY *eckey = pkey->pkey.ec; | |
532 | ||
533 | /* stay consistent to what EVP_PKEY_check demands */ | |
534 | if (eckey->priv_key == NULL) { | |
6807b84e | 535 | ECerr(EC_F_EC_PKEY_CHECK, EC_R_MISSING_PRIVATE_KEY); |
2aee35d3 PY |
536 | return 0; |
537 | } | |
538 | ||
539 | return EC_KEY_check_key(eckey); | |
540 | } | |
541 | ||
b0004708 PY |
542 | static int ec_pkey_public_check(const EVP_PKEY *pkey) |
543 | { | |
544 | EC_KEY *eckey = pkey->pkey.ec; | |
545 | ||
546 | /* | |
547 | * Note: it unnecessary to check eckey->pub_key here since | |
548 | * it will be checked in EC_KEY_check_key(). In fact, the | |
549 | * EC_KEY_check_key() mainly checks the public key, and checks | |
550 | * the private key optionally (only if there is one). So if | |
551 | * someone passes a whole EC key (public + private), this | |
552 | * will also work... | |
553 | */ | |
554 | ||
555 | return EC_KEY_check_key(eckey); | |
556 | } | |
557 | ||
558 | static int ec_pkey_param_check(const EVP_PKEY *pkey) | |
559 | { | |
560 | EC_KEY *eckey = pkey->pkey.ec; | |
561 | ||
562 | /* stay consistent to what EVP_PKEY_check demands */ | |
563 | if (eckey->group == NULL) { | |
564 | ECerr(EC_F_EC_PKEY_PARAM_CHECK, EC_R_MISSING_PARAMETERS); | |
565 | return 0; | |
566 | } | |
567 | ||
568 | return EC_GROUP_check(eckey->group, NULL); | |
569 | } | |
570 | ||
0f113f3e MC |
571 | const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = { |
572 | EVP_PKEY_EC, | |
573 | EVP_PKEY_EC, | |
574 | 0, | |
575 | "EC", | |
576 | "OpenSSL EC algorithm", | |
577 | ||
578 | eckey_pub_decode, | |
579 | eckey_pub_encode, | |
580 | eckey_pub_cmp, | |
581 | eckey_pub_print, | |
582 | ||
583 | eckey_priv_decode, | |
584 | eckey_priv_encode, | |
585 | eckey_priv_print, | |
586 | ||
587 | int_ec_size, | |
588 | ec_bits, | |
589 | ec_security_bits, | |
590 | ||
591 | eckey_param_decode, | |
592 | eckey_param_encode, | |
593 | ec_missing_parameters, | |
594 | ec_copy_parameters, | |
595 | ec_cmp_parameters, | |
596 | eckey_param_print, | |
597 | 0, | |
598 | ||
599 | int_ec_free, | |
600 | ec_pkey_ctrl, | |
601 | old_ec_priv_decode, | |
2aee35d3 PY |
602 | old_ec_priv_encode, |
603 | ||
604 | 0, 0, 0, | |
605 | ||
b0004708 PY |
606 | ec_pkey_check, |
607 | ec_pkey_public_check, | |
608 | ec_pkey_param_check | |
0f113f3e | 609 | }; |
88e20b85 | 610 | |
ddb634fe JL |
611 | #if !defined(OPENSSL_NO_SM2) |
612 | const EVP_PKEY_ASN1_METHOD sm2_asn1_meth = { | |
613 | EVP_PKEY_SM2, | |
614 | EVP_PKEY_EC, | |
615 | ASN1_PKEY_ALIAS | |
616 | }; | |
617 | #endif | |
618 | ||
dca5eeb4 RS |
619 | int EC_KEY_print(BIO *bp, const EC_KEY *x, int off) |
620 | { | |
621 | int private = EC_KEY_get0_private_key(x) != NULL; | |
622 | ||
623 | return do_EC_KEY_print(bp, x, off, | |
a66069db | 624 | private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC); |
dca5eeb4 RS |
625 | } |
626 | ||
627 | int ECParameters_print(BIO *bp, const EC_KEY *x) | |
628 | { | |
629 | return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM); | |
630 | } | |
631 | ||
88e20b85 DSH |
632 | #ifndef OPENSSL_NO_CMS |
633 | ||
634 | static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
635 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
636 | { | |
ac4e2577 | 637 | const ASN1_OBJECT *aoid; |
0f113f3e | 638 | int atype; |
ac4e2577 | 639 | const void *aval; |
0f113f3e MC |
640 | int rv = 0; |
641 | EVP_PKEY *pkpeer = NULL; | |
642 | EC_KEY *ecpeer = NULL; | |
643 | const unsigned char *p; | |
644 | int plen; | |
645 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
646 | if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey) | |
647 | goto err; | |
648 | /* If absent parameters get group from main key */ | |
649 | if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) { | |
650 | const EC_GROUP *grp; | |
651 | EVP_PKEY *pk; | |
652 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
653 | if (!pk) | |
654 | goto err; | |
655 | grp = EC_KEY_get0_group(pk->pkey.ec); | |
656 | ecpeer = EC_KEY_new(); | |
90945fa3 | 657 | if (ecpeer == NULL) |
0f113f3e MC |
658 | goto err; |
659 | if (!EC_KEY_set_group(ecpeer, grp)) | |
660 | goto err; | |
661 | } else { | |
662 | ecpeer = eckey_type2param(atype, aval); | |
663 | if (!ecpeer) | |
664 | goto err; | |
665 | } | |
666 | /* We have parameters now set public key */ | |
667 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 668 | p = ASN1_STRING_get0_data(pubkey); |
0f113f3e MC |
669 | if (!p || !plen) |
670 | goto err; | |
671 | if (!o2i_ECPublicKey(&ecpeer, &p, plen)) | |
672 | goto err; | |
673 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 674 | if (pkpeer == NULL) |
0f113f3e MC |
675 | goto err; |
676 | EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer); | |
677 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
678 | rv = 1; | |
679 | err: | |
8fdc3734 | 680 | EC_KEY_free(ecpeer); |
c5ba2d99 | 681 | EVP_PKEY_free(pkpeer); |
0f113f3e MC |
682 | return rv; |
683 | } | |
684 | ||
88e20b85 DSH |
685 | /* Set KDF parameters based on KDF NID */ |
686 | static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid) | |
0f113f3e MC |
687 | { |
688 | int kdf_nid, kdfmd_nid, cofactor; | |
689 | const EVP_MD *kdf_md; | |
690 | if (eckdf_nid == NID_undef) | |
691 | return 0; | |
692 | ||
693 | /* Lookup KDF type, cofactor mode and digest */ | |
694 | if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid)) | |
695 | return 0; | |
696 | ||
697 | if (kdf_nid == NID_dh_std_kdf) | |
698 | cofactor = 0; | |
699 | else if (kdf_nid == NID_dh_cofactor_kdf) | |
700 | cofactor = 1; | |
701 | else | |
702 | return 0; | |
703 | ||
704 | if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0) | |
705 | return 0; | |
706 | ||
87103969 | 707 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_63) <= 0) |
0f113f3e MC |
708 | return 0; |
709 | ||
710 | kdf_md = EVP_get_digestbynid(kdfmd_nid); | |
711 | if (!kdf_md) | |
712 | return 0; | |
713 | ||
714 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
715 | return 0; | |
716 | return 1; | |
717 | } | |
88e20b85 | 718 | |
88e20b85 | 719 | static int ecdh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) |
0f113f3e MC |
720 | { |
721 | int rv = 0; | |
722 | ||
723 | X509_ALGOR *alg, *kekalg = NULL; | |
724 | ASN1_OCTET_STRING *ukm; | |
725 | const unsigned char *p; | |
726 | unsigned char *der = NULL; | |
727 | int plen, keylen; | |
728 | const EVP_CIPHER *kekcipher; | |
729 | EVP_CIPHER_CTX *kekctx; | |
730 | ||
731 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
732 | return 0; | |
733 | ||
734 | if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm))) { | |
735 | ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
740 | return 0; | |
741 | ||
742 | p = alg->parameter->value.sequence->data; | |
743 | plen = alg->parameter->value.sequence->length; | |
744 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
745 | if (!kekalg) | |
746 | goto err; | |
747 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
748 | if (!kekctx) | |
749 | goto err; | |
750 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
751 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
752 | goto err; | |
753 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
754 | goto err; | |
755 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
756 | goto err; | |
757 | ||
758 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
759 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
760 | goto err; | |
761 | ||
762 | plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen); | |
763 | ||
764 | if (!plen) | |
765 | goto err; | |
766 | ||
767 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0) | |
768 | goto err; | |
769 | der = NULL; | |
770 | ||
771 | rv = 1; | |
772 | err: | |
222561fe RS |
773 | X509_ALGOR_free(kekalg); |
774 | OPENSSL_free(der); | |
0f113f3e MC |
775 | return rv; |
776 | } | |
88e20b85 DSH |
777 | |
778 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
779 | { |
780 | EVP_PKEY_CTX *pctx; | |
781 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
782 | if (!pctx) | |
783 | return 0; | |
784 | /* See if we need to set peer key */ | |
785 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
786 | X509_ALGOR *alg; | |
787 | ASN1_BIT_STRING *pubkey; | |
788 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
789 | NULL, NULL, NULL)) | |
790 | return 0; | |
791 | if (!alg || !pubkey) | |
792 | return 0; | |
793 | if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) { | |
794 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR); | |
795 | return 0; | |
796 | } | |
797 | } | |
798 | /* Set ECDH derivation parameters and initialise unwrap context */ | |
799 | if (!ecdh_cms_set_shared_info(pctx, ri)) { | |
800 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR); | |
801 | return 0; | |
802 | } | |
803 | return 1; | |
804 | } | |
88e20b85 DSH |
805 | |
806 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
807 | { |
808 | EVP_PKEY_CTX *pctx; | |
809 | EVP_PKEY *pkey; | |
810 | EVP_CIPHER_CTX *ctx; | |
811 | int keylen; | |
812 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 813 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
814 | ASN1_BIT_STRING *pubkey; |
815 | ASN1_STRING *wrap_str; | |
816 | ASN1_OCTET_STRING *ukm; | |
817 | unsigned char *penc = NULL; | |
818 | int penclen; | |
819 | int rv = 0; | |
820 | int ecdh_nid, kdf_type, kdf_nid, wrap_nid; | |
821 | const EVP_MD *kdf_md; | |
822 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
823 | if (!pctx) | |
824 | return 0; | |
825 | /* Get ephemeral key */ | |
826 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
827 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
828 | NULL, NULL, NULL)) | |
829 | goto err; | |
830 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
831 | /* Is everything uninitialised? */ | |
832 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
833 | ||
834 | EC_KEY *eckey = pkey->pkey.ec; | |
835 | /* Set the key */ | |
836 | unsigned char *p; | |
837 | ||
838 | penclen = i2o_ECPublicKey(eckey, NULL); | |
839 | if (penclen <= 0) | |
840 | goto err; | |
841 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 842 | if (penc == NULL) |
0f113f3e MC |
843 | goto err; |
844 | p = penc; | |
845 | penclen = i2o_ECPublicKey(eckey, &p); | |
846 | if (penclen <= 0) | |
847 | goto err; | |
848 | ASN1_STRING_set0(pubkey, penc, penclen); | |
849 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
850 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
851 | ||
852 | penc = NULL; | |
853 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), | |
854 | V_ASN1_UNDEF, NULL); | |
855 | } | |
856 | ||
0d4fb843 | 857 | /* See if custom parameters set */ |
0f113f3e MC |
858 | kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx); |
859 | if (kdf_type <= 0) | |
860 | goto err; | |
861 | if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md)) | |
862 | goto err; | |
863 | ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx); | |
864 | if (ecdh_nid < 0) | |
865 | goto err; | |
866 | else if (ecdh_nid == 0) | |
867 | ecdh_nid = NID_dh_std_kdf; | |
868 | else if (ecdh_nid == 1) | |
869 | ecdh_nid = NID_dh_cofactor_kdf; | |
870 | ||
871 | if (kdf_type == EVP_PKEY_ECDH_KDF_NONE) { | |
87103969 | 872 | kdf_type = EVP_PKEY_ECDH_KDF_X9_63; |
0f113f3e MC |
873 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0) |
874 | goto err; | |
875 | } else | |
0d4fb843 | 876 | /* Unknown KDF */ |
0f113f3e MC |
877 | goto err; |
878 | if (kdf_md == NULL) { | |
879 | /* Fixme later for better MD */ | |
880 | kdf_md = EVP_sha1(); | |
881 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
882 | goto err; | |
883 | } | |
884 | ||
885 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
886 | goto err; | |
887 | ||
888 | /* Lookup NID for KDF+cofactor+digest */ | |
889 | ||
890 | if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid)) | |
891 | goto err; | |
892 | /* Get wrap NID */ | |
893 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
894 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
895 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
896 | ||
897 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
898 | ||
899 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 900 | if (wrap_alg == NULL) |
0f113f3e MC |
901 | goto err; |
902 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
903 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 904 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
905 | goto err; |
906 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
907 | goto err; | |
908 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
909 | ASN1_TYPE_free(wrap_alg->parameter); | |
910 | wrap_alg->parameter = NULL; | |
911 | } | |
912 | ||
913 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
914 | goto err; | |
915 | ||
916 | penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen); | |
917 | ||
918 | if (!penclen) | |
919 | goto err; | |
920 | ||
921 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0) | |
922 | goto err; | |
923 | penc = NULL; | |
924 | ||
925 | /* | |
926 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
927 | * of another AlgorithmIdentifier. | |
928 | */ | |
929 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
930 | if (!penc || !penclen) | |
931 | goto err; | |
932 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 933 | if (wrap_str == NULL) |
0f113f3e MC |
934 | goto err; |
935 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
936 | penc = NULL; | |
937 | X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str); | |
938 | ||
939 | rv = 1; | |
940 | ||
941 | err: | |
222561fe RS |
942 | OPENSSL_free(penc); |
943 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
944 | return rv; |
945 | } | |
88e20b85 DSH |
946 | |
947 | #endif |