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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 | * |
a7f182b7 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
448be743 DSH |
8 | */ |
9 | ||
579422c8 P |
10 | /* |
11 | * ECDH and ECDSA low level APIs are deprecated for public use, but still ok | |
12 | * for internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
448be743 | 16 | #include <stdio.h> |
b39fc560 | 17 | #include "internal/cryptlib.h" |
448be743 DSH |
18 | #include <openssl/x509.h> |
19 | #include <openssl/ec.h> | |
1e26a8ba | 20 | #include <openssl/bn.h> |
3c27208f | 21 | #include <openssl/cms.h> |
88e20b85 | 22 | #include <openssl/asn1t.h> |
25f2138b DMSP |
23 | #include "crypto/asn1.h" |
24 | #include "crypto/evp.h" | |
706457b7 | 25 | #include "ec_local.h" |
448be743 | 26 | |
e968561d | 27 | #ifndef OPENSSL_NO_CMS |
88e20b85 DSH |
28 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri); |
29 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri); | |
e968561d | 30 | #endif |
88e20b85 | 31 | |
448be743 | 32 | static int eckey_param2type(int *pptype, void **ppval, EC_KEY *ec_key) |
0f113f3e MC |
33 | { |
34 | const EC_GROUP *group; | |
35 | int nid; | |
36 | if (ec_key == NULL || (group = EC_KEY_get0_group(ec_key)) == NULL) { | |
37 | ECerr(EC_F_ECKEY_PARAM2TYPE, EC_R_MISSING_PARAMETERS); | |
38 | return 0; | |
39 | } | |
40 | if (EC_GROUP_get_asn1_flag(group) | |
41 | && (nid = EC_GROUP_get_curve_name(group))) | |
42 | /* we have a 'named curve' => just set the OID */ | |
43 | { | |
44 | *ppval = OBJ_nid2obj(nid); | |
45 | *pptype = V_ASN1_OBJECT; | |
46 | } else { /* explicit parameters */ | |
47 | ||
48 | ASN1_STRING *pstr = NULL; | |
49 | pstr = ASN1_STRING_new(); | |
90945fa3 | 50 | if (pstr == NULL) |
0f113f3e MC |
51 | return 0; |
52 | pstr->length = i2d_ECParameters(ec_key, &pstr->data); | |
53 | if (pstr->length <= 0) { | |
54 | ASN1_STRING_free(pstr); | |
55 | ECerr(EC_F_ECKEY_PARAM2TYPE, ERR_R_EC_LIB); | |
56 | return 0; | |
57 | } | |
58 | *ppval = pstr; | |
59 | *pptype = V_ASN1_SEQUENCE; | |
60 | } | |
61 | return 1; | |
62 | } | |
448be743 | 63 | |
6f81892e | 64 | static int eckey_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
0f113f3e MC |
65 | { |
66 | EC_KEY *ec_key = pkey->pkey.ec; | |
67 | void *pval = NULL; | |
68 | int ptype; | |
69 | unsigned char *penc = NULL, *p; | |
70 | int penclen; | |
71 | ||
72 | if (!eckey_param2type(&ptype, &pval, ec_key)) { | |
73 | ECerr(EC_F_ECKEY_PUB_ENCODE, ERR_R_EC_LIB); | |
74 | return 0; | |
75 | } | |
76 | penclen = i2o_ECPublicKey(ec_key, NULL); | |
77 | if (penclen <= 0) | |
78 | goto err; | |
79 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 80 | if (penc == NULL) |
0f113f3e MC |
81 | goto err; |
82 | p = penc; | |
83 | penclen = i2o_ECPublicKey(ec_key, &p); | |
84 | if (penclen <= 0) | |
85 | goto err; | |
86 | if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_EC), | |
87 | ptype, pval, penc, penclen)) | |
88 | return 1; | |
89 | err: | |
90 | if (ptype == V_ASN1_OBJECT) | |
91 | ASN1_OBJECT_free(pval); | |
92 | else | |
93 | ASN1_STRING_free(pval); | |
b548a1f1 | 94 | OPENSSL_free(penc); |
0f113f3e MC |
95 | return 0; |
96 | } | |
448be743 | 97 | |
ac4e2577 | 98 | static EC_KEY *eckey_type2param(int ptype, const void *pval) |
0f113f3e MC |
99 | { |
100 | EC_KEY *eckey = NULL; | |
037241bf RS |
101 | EC_GROUP *group = NULL; |
102 | ||
0f113f3e | 103 | if (ptype == V_ASN1_SEQUENCE) { |
ac4e2577 | 104 | const ASN1_STRING *pstr = pval; |
037241bf RS |
105 | const unsigned char *pm = pstr->data; |
106 | int pmlen = pstr->length; | |
107 | ||
75ebbd9a | 108 | if ((eckey = d2i_ECParameters(NULL, &pm, pmlen)) == NULL) { |
0f113f3e MC |
109 | ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); |
110 | goto ecerr; | |
111 | } | |
112 | } else if (ptype == V_ASN1_OBJECT) { | |
ac4e2577 | 113 | const ASN1_OBJECT *poid = pval; |
0f113f3e MC |
114 | |
115 | /* | |
116 | * type == V_ASN1_OBJECT => the parameters are given by an asn1 OID | |
117 | */ | |
118 | if ((eckey = EC_KEY_new()) == NULL) { | |
119 | ECerr(EC_F_ECKEY_TYPE2PARAM, ERR_R_MALLOC_FAILURE); | |
120 | goto ecerr; | |
121 | } | |
122 | group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(poid)); | |
123 | if (group == NULL) | |
124 | goto ecerr; | |
125 | EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); | |
126 | if (EC_KEY_set_group(eckey, group) == 0) | |
127 | goto ecerr; | |
128 | EC_GROUP_free(group); | |
129 | } else { | |
130 | ECerr(EC_F_ECKEY_TYPE2PARAM, EC_R_DECODE_ERROR); | |
131 | goto ecerr; | |
132 | } | |
133 | ||
134 | return eckey; | |
135 | ||
136 | ecerr: | |
8fdc3734 | 137 | EC_KEY_free(eckey); |
037241bf | 138 | EC_GROUP_free(group); |
0f113f3e MC |
139 | return NULL; |
140 | } | |
448be743 DSH |
141 | |
142 | static int eckey_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) | |
0f113f3e MC |
143 | { |
144 | const unsigned char *p = NULL; | |
ac4e2577 | 145 | const void *pval; |
0f113f3e MC |
146 | int ptype, pklen; |
147 | EC_KEY *eckey = NULL; | |
148 | X509_ALGOR *palg; | |
149 | ||
150 | if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) | |
151 | return 0; | |
152 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
153 | ||
154 | eckey = eckey_type2param(ptype, pval); | |
155 | ||
156 | if (!eckey) { | |
157 | ECerr(EC_F_ECKEY_PUB_DECODE, ERR_R_EC_LIB); | |
158 | return 0; | |
159 | } | |
160 | ||
161 | /* We have parameters now set public key */ | |
162 | if (!o2i_ECPublicKey(&eckey, &p, pklen)) { | |
163 | ECerr(EC_F_ECKEY_PUB_DECODE, EC_R_DECODE_ERROR); | |
164 | goto ecerr; | |
165 | } | |
166 | ||
167 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
168 | return 1; | |
169 | ||
170 | ecerr: | |
8fdc3734 | 171 | EC_KEY_free(eckey); |
0f113f3e MC |
172 | return 0; |
173 | } | |
448be743 | 174 | |
6f81892e | 175 | static int eckey_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
176 | { |
177 | int r; | |
178 | const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec); | |
179 | const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec), | |
180 | *pb = EC_KEY_get0_public_key(b->pkey.ec); | |
978ecbb0 DW |
181 | if (group == NULL || pa == NULL || pb == NULL) |
182 | return -2; | |
0f113f3e MC |
183 | r = EC_POINT_cmp(group, pa, pb, NULL); |
184 | if (r == 0) | |
185 | return 1; | |
186 | if (r == 1) | |
187 | return 0; | |
188 | return -2; | |
189 | } | |
6f81892e | 190 | |
245c6bc3 | 191 | static int eckey_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8) |
0f113f3e MC |
192 | { |
193 | const unsigned char *p = NULL; | |
ac4e2577 | 194 | const void *pval; |
0f113f3e MC |
195 | int ptype, pklen; |
196 | EC_KEY *eckey = NULL; | |
245c6bc3 | 197 | const X509_ALGOR *palg; |
0f113f3e MC |
198 | |
199 | if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) | |
200 | return 0; | |
201 | X509_ALGOR_get0(NULL, &ptype, &pval, palg); | |
202 | ||
203 | eckey = eckey_type2param(ptype, pval); | |
204 | ||
12a765a5 | 205 | if (eckey == NULL) |
0f113f3e MC |
206 | goto ecliberr; |
207 | ||
208 | /* We have parameters now set private key */ | |
209 | if (!d2i_ECPrivateKey(&eckey, &p, pklen)) { | |
210 | ECerr(EC_F_ECKEY_PRIV_DECODE, EC_R_DECODE_ERROR); | |
211 | goto ecerr; | |
212 | } | |
213 | ||
0f113f3e MC |
214 | EVP_PKEY_assign_EC_KEY(pkey, eckey); |
215 | return 1; | |
216 | ||
217 | ecliberr: | |
218 | ECerr(EC_F_ECKEY_PRIV_DECODE, ERR_R_EC_LIB); | |
219 | ecerr: | |
8fdc3734 | 220 | EC_KEY_free(eckey); |
0f113f3e MC |
221 | return 0; |
222 | } | |
448be743 | 223 | |
6f81892e | 224 | static int eckey_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
448be743 | 225 | { |
b8a7bd83 | 226 | EC_KEY ec_key = *(pkey->pkey.ec); |
0f113f3e MC |
227 | unsigned char *ep, *p; |
228 | int eplen, ptype; | |
229 | void *pval; | |
b8a7bd83 | 230 | unsigned int old_flags; |
0f113f3e | 231 | |
b8a7bd83 | 232 | if (!eckey_param2type(&ptype, &pval, &ec_key)) { |
0f113f3e MC |
233 | ECerr(EC_F_ECKEY_PRIV_ENCODE, EC_R_DECODE_ERROR); |
234 | return 0; | |
235 | } | |
236 | ||
237 | /* set the private key */ | |
238 | ||
239 | /* | |
240 | * do not include the parameters in the SEC1 private key see PKCS#11 | |
241 | * 12.11 | |
242 | */ | |
b8a7bd83 RL |
243 | old_flags = EC_KEY_get_enc_flags(&ec_key); |
244 | EC_KEY_set_enc_flags(&ec_key, old_flags | EC_PKEY_NO_PARAMETERS); | |
245 | ||
246 | eplen = i2d_ECPrivateKey(&ec_key, NULL); | |
0f113f3e | 247 | if (!eplen) { |
0f113f3e MC |
248 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); |
249 | return 0; | |
250 | } | |
b196e7d9 | 251 | ep = OPENSSL_malloc(eplen); |
90945fa3 | 252 | if (ep == NULL) { |
0f113f3e MC |
253 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
254 | return 0; | |
255 | } | |
256 | p = ep; | |
b8a7bd83 | 257 | if (!i2d_ECPrivateKey(&ec_key, &p)) { |
0f113f3e MC |
258 | OPENSSL_free(ep); |
259 | ECerr(EC_F_ECKEY_PRIV_ENCODE, ERR_R_EC_LIB); | |
260 | return 0; | |
261 | } | |
0f113f3e MC |
262 | |
263 | if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), 0, | |
e0670973 Y |
264 | ptype, pval, ep, eplen)) { |
265 | OPENSSL_free(ep); | |
0f113f3e | 266 | return 0; |
e0670973 | 267 | } |
0f113f3e MC |
268 | |
269 | return 1; | |
448be743 DSH |
270 | } |
271 | ||
6f81892e | 272 | static int int_ec_size(const EVP_PKEY *pkey) |
0f113f3e MC |
273 | { |
274 | return ECDSA_size(pkey->pkey.ec); | |
275 | } | |
6f81892e DSH |
276 | |
277 | static int ec_bits(const EVP_PKEY *pkey) | |
0f113f3e | 278 | { |
be2e334f | 279 | return EC_GROUP_order_bits(EC_KEY_get0_group(pkey->pkey.ec)); |
0f113f3e | 280 | } |
6f81892e | 281 | |
2514fa79 | 282 | static int ec_security_bits(const EVP_PKEY *pkey) |
0f113f3e MC |
283 | { |
284 | int ecbits = ec_bits(pkey); | |
285 | if (ecbits >= 512) | |
286 | return 256; | |
287 | if (ecbits >= 384) | |
288 | return 192; | |
289 | if (ecbits >= 256) | |
290 | return 128; | |
291 | if (ecbits >= 224) | |
292 | return 112; | |
293 | if (ecbits >= 160) | |
294 | return 80; | |
295 | return ecbits / 2; | |
296 | } | |
2514fa79 | 297 | |
6f81892e | 298 | static int ec_missing_parameters(const EVP_PKEY *pkey) |
0f113f3e | 299 | { |
f72f00d4 | 300 | if (pkey->pkey.ec == NULL || EC_KEY_get0_group(pkey->pkey.ec) == NULL) |
0f113f3e MC |
301 | return 1; |
302 | return 0; | |
303 | } | |
6f81892e | 304 | |
930b0c4b | 305 | static int ec_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) |
0f113f3e MC |
306 | { |
307 | EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec)); | |
188a9bd9 | 308 | |
0f113f3e MC |
309 | if (group == NULL) |
310 | return 0; | |
2986ecdc DSH |
311 | if (to->pkey.ec == NULL) { |
312 | to->pkey.ec = EC_KEY_new(); | |
313 | if (to->pkey.ec == NULL) | |
188a9bd9 | 314 | goto err; |
2986ecdc | 315 | } |
0f113f3e | 316 | if (EC_KEY_set_group(to->pkey.ec, group) == 0) |
188a9bd9 | 317 | goto err; |
0f113f3e MC |
318 | EC_GROUP_free(group); |
319 | return 1; | |
188a9bd9 BE |
320 | err: |
321 | EC_GROUP_free(group); | |
322 | return 0; | |
0f113f3e | 323 | } |
6f81892e | 324 | |
930b0c4b | 325 | static int ec_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) |
0f113f3e MC |
326 | { |
327 | const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec), | |
328 | *group_b = EC_KEY_get0_group(b->pkey.ec); | |
978ecbb0 DW |
329 | if (group_a == NULL || group_b == NULL) |
330 | return -2; | |
0f113f3e MC |
331 | if (EC_GROUP_cmp(group_a, group_b, NULL)) |
332 | return 0; | |
333 | else | |
334 | return 1; | |
335 | } | |
6f81892e DSH |
336 | |
337 | static void int_ec_free(EVP_PKEY *pkey) | |
0f113f3e MC |
338 | { |
339 | EC_KEY_free(pkey->pkey.ec); | |
340 | } | |
6f81892e | 341 | |
d6755bb6 DSH |
342 | typedef enum { |
343 | EC_KEY_PRINT_PRIVATE, | |
344 | EC_KEY_PRINT_PUBLIC, | |
345 | EC_KEY_PRINT_PARAM | |
346 | } ec_print_t; | |
347 | ||
348 | static int do_EC_KEY_print(BIO *bp, const EC_KEY *x, int off, ec_print_t ktype) | |
0f113f3e | 349 | { |
0f113f3e | 350 | const char *ecstr; |
7fc7d1a7 DSH |
351 | unsigned char *priv = NULL, *pub = NULL; |
352 | size_t privlen = 0, publen = 0; | |
353 | int ret = 0; | |
0f113f3e | 354 | const EC_GROUP *group; |
0f113f3e MC |
355 | |
356 | if (x == NULL || (group = EC_KEY_get0_group(x)) == NULL) { | |
7fc7d1a7 DSH |
357 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_PASSED_NULL_PARAMETER); |
358 | return 0; | |
0f113f3e MC |
359 | } |
360 | ||
82f52631 | 361 | if (ktype != EC_KEY_PRINT_PARAM && EC_KEY_get0_public_key(x) != NULL) { |
7fc7d1a7 DSH |
362 | publen = EC_KEY_key2buf(x, EC_KEY_get_conv_form(x), &pub, NULL); |
363 | if (publen == 0) | |
364 | goto err; | |
0f113f3e MC |
365 | } |
366 | ||
d6755bb6 | 367 | if (ktype == EC_KEY_PRINT_PRIVATE && EC_KEY_get0_private_key(x) != NULL) { |
7fc7d1a7 DSH |
368 | privlen = EC_KEY_priv2buf(x, &priv); |
369 | if (privlen == 0) | |
d810700b | 370 | goto err; |
d810700b | 371 | } |
0f113f3e | 372 | |
d6755bb6 | 373 | if (ktype == EC_KEY_PRINT_PRIVATE) |
0f113f3e | 374 | ecstr = "Private-Key"; |
d6755bb6 | 375 | else if (ktype == EC_KEY_PRINT_PUBLIC) |
0f113f3e MC |
376 | ecstr = "Public-Key"; |
377 | else | |
378 | ecstr = "ECDSA-Parameters"; | |
379 | ||
380 | if (!BIO_indent(bp, off, 128)) | |
381 | goto err; | |
be2e334f DSH |
382 | if (BIO_printf(bp, "%s: (%d bit)\n", ecstr, |
383 | EC_GROUP_order_bits(group)) <= 0) | |
0f113f3e MC |
384 | goto err; |
385 | ||
7fc7d1a7 | 386 | if (privlen != 0) { |
d810700b DSH |
387 | if (BIO_printf(bp, "%*spriv:\n", off, "") <= 0) |
388 | goto err; | |
7fc7d1a7 | 389 | if (ASN1_buf_print(bp, priv, privlen, off + 4) == 0) |
d810700b DSH |
390 | goto err; |
391 | } | |
392 | ||
7fc7d1a7 | 393 | if (publen != 0) { |
d810700b DSH |
394 | if (BIO_printf(bp, "%*spub:\n", off, "") <= 0) |
395 | goto err; | |
7fc7d1a7 | 396 | if (ASN1_buf_print(bp, pub, publen, off + 4) == 0) |
d810700b DSH |
397 | goto err; |
398 | } | |
399 | ||
0f113f3e MC |
400 | if (!ECPKParameters_print(bp, group, off)) |
401 | goto err; | |
402 | ret = 1; | |
403 | err: | |
404 | if (!ret) | |
7fc7d1a7 DSH |
405 | ECerr(EC_F_DO_EC_KEY_PRINT, ERR_R_EC_LIB); |
406 | OPENSSL_clear_free(priv, privlen); | |
407 | OPENSSL_free(pub); | |
d810700b | 408 | return ret; |
0f113f3e | 409 | } |
35208f36 | 410 | |
3e4585c8 | 411 | static int eckey_param_decode(EVP_PKEY *pkey, |
0f113f3e MC |
412 | const unsigned char **pder, int derlen) |
413 | { | |
414 | EC_KEY *eckey; | |
75ebbd9a RS |
415 | |
416 | if ((eckey = d2i_ECParameters(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
417 | ECerr(EC_F_ECKEY_PARAM_DECODE, ERR_R_EC_LIB); |
418 | return 0; | |
419 | } | |
420 | EVP_PKEY_assign_EC_KEY(pkey, eckey); | |
421 | return 1; | |
422 | } | |
3e4585c8 DSH |
423 | |
424 | static int eckey_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
425 | { |
426 | return i2d_ECParameters(pkey->pkey.ec, pder); | |
427 | } | |
3e4585c8 | 428 | |
35208f36 | 429 | static int eckey_param_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_PARAM); |
0f113f3e | 433 | } |
35208f36 DSH |
434 | |
435 | static int eckey_pub_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_PUBLIC); |
0f113f3e | 439 | } |
35208f36 DSH |
440 | |
441 | static int eckey_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
0f113f3e MC |
442 | ASN1_PCTX *ctx) |
443 | { | |
d6755bb6 | 444 | return do_EC_KEY_print(bp, pkey->pkey.ec, indent, EC_KEY_PRINT_PRIVATE); |
0f113f3e | 445 | } |
35208f36 | 446 | |
e4263314 | 447 | static int old_ec_priv_decode(EVP_PKEY *pkey, |
0f113f3e MC |
448 | const unsigned char **pder, int derlen) |
449 | { | |
450 | EC_KEY *ec; | |
75ebbd9a RS |
451 | |
452 | if ((ec = d2i_ECPrivateKey(NULL, pder, derlen)) == NULL) { | |
0f113f3e MC |
453 | ECerr(EC_F_OLD_EC_PRIV_DECODE, EC_R_DECODE_ERROR); |
454 | return 0; | |
455 | } | |
456 | EVP_PKEY_assign_EC_KEY(pkey, ec); | |
457 | return 1; | |
458 | } | |
e4263314 DSH |
459 | |
460 | static int old_ec_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
0f113f3e MC |
461 | { |
462 | return i2d_ECPrivateKey(pkey->pkey.ec, pder); | |
463 | } | |
e4263314 | 464 | |
492a9e24 | 465 | static int ec_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
0f113f3e MC |
466 | { |
467 | switch (op) { | |
468 | case ASN1_PKEY_CTRL_PKCS7_SIGN: | |
469 | if (arg1 == 0) { | |
470 | int snid, hnid; | |
471 | X509_ALGOR *alg1, *alg2; | |
472 | PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); | |
473 | if (alg1 == NULL || alg1->algorithm == NULL) | |
474 | return -1; | |
475 | hnid = OBJ_obj2nid(alg1->algorithm); | |
476 | if (hnid == NID_undef) | |
477 | return -1; | |
478 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
479 | return -1; | |
480 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
481 | } | |
482 | return 1; | |
8931b30d | 483 | #ifndef OPENSSL_NO_CMS |
0f113f3e MC |
484 | case ASN1_PKEY_CTRL_CMS_SIGN: |
485 | if (arg1 == 0) { | |
486 | int snid, hnid; | |
487 | X509_ALGOR *alg1, *alg2; | |
488 | CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); | |
489 | if (alg1 == NULL || alg1->algorithm == NULL) | |
490 | return -1; | |
491 | hnid = OBJ_obj2nid(alg1->algorithm); | |
492 | if (hnid == NID_undef) | |
493 | return -1; | |
494 | if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) | |
495 | return -1; | |
496 | X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); | |
497 | } | |
498 | return 1; | |
499 | ||
500 | case ASN1_PKEY_CTRL_CMS_ENVELOPE: | |
501 | if (arg1 == 1) | |
502 | return ecdh_cms_decrypt(arg2); | |
503 | else if (arg1 == 0) | |
504 | return ecdh_cms_encrypt(arg2); | |
505 | return -2; | |
506 | ||
507 | case ASN1_PKEY_CTRL_CMS_RI_TYPE: | |
508 | *(int *)arg2 = CMS_RECIPINFO_AGREE; | |
509 | return 1; | |
8931b30d | 510 | #endif |
492a9e24 | 511 | |
0f113f3e | 512 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
e766f4a0 PY |
513 | if (EVP_PKEY_id(pkey) == EVP_PKEY_SM2) { |
514 | /* For SM2, the only valid digest-alg is SM3 */ | |
515 | *(int *)arg2 = NID_sm3; | |
ef077ba0 | 516 | return 2; /* Make it mandatory */ |
e766f4a0 | 517 | } |
ef077ba0 | 518 | *(int *)arg2 = NID_sha256; |
eb7eb137 | 519 | return 1; |
492a9e24 | 520 | |
3bca6c27 DSH |
521 | case ASN1_PKEY_CTRL_SET1_TLS_ENCPT: |
522 | return EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(pkey), arg2, arg1, NULL); | |
523 | ||
524 | case ASN1_PKEY_CTRL_GET1_TLS_ENCPT: | |
525 | return EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(pkey), | |
526 | POINT_CONVERSION_UNCOMPRESSED, arg2, NULL); | |
527 | ||
0f113f3e MC |
528 | default: |
529 | return -2; | |
6f81892e | 530 | |
0f113f3e | 531 | } |
6f81892e | 532 | |
0f113f3e | 533 | } |
6f81892e | 534 | |
2aee35d3 PY |
535 | static int ec_pkey_check(const EVP_PKEY *pkey) |
536 | { | |
537 | EC_KEY *eckey = pkey->pkey.ec; | |
538 | ||
539 | /* stay consistent to what EVP_PKEY_check demands */ | |
540 | if (eckey->priv_key == NULL) { | |
6807b84e | 541 | ECerr(EC_F_EC_PKEY_CHECK, EC_R_MISSING_PRIVATE_KEY); |
2aee35d3 PY |
542 | return 0; |
543 | } | |
544 | ||
545 | return EC_KEY_check_key(eckey); | |
546 | } | |
547 | ||
b0004708 PY |
548 | static int ec_pkey_public_check(const EVP_PKEY *pkey) |
549 | { | |
550 | EC_KEY *eckey = pkey->pkey.ec; | |
551 | ||
552 | /* | |
553 | * Note: it unnecessary to check eckey->pub_key here since | |
554 | * it will be checked in EC_KEY_check_key(). In fact, the | |
555 | * EC_KEY_check_key() mainly checks the public key, and checks | |
556 | * the private key optionally (only if there is one). So if | |
557 | * someone passes a whole EC key (public + private), this | |
558 | * will also work... | |
559 | */ | |
560 | ||
561 | return EC_KEY_check_key(eckey); | |
562 | } | |
563 | ||
564 | static int ec_pkey_param_check(const EVP_PKEY *pkey) | |
565 | { | |
566 | EC_KEY *eckey = pkey->pkey.ec; | |
567 | ||
568 | /* stay consistent to what EVP_PKEY_check demands */ | |
569 | if (eckey->group == NULL) { | |
570 | ECerr(EC_F_EC_PKEY_PARAM_CHECK, EC_R_MISSING_PARAMETERS); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | return EC_GROUP_check(eckey->group, NULL); | |
575 | } | |
576 | ||
0f113f3e MC |
577 | const EVP_PKEY_ASN1_METHOD eckey_asn1_meth = { |
578 | EVP_PKEY_EC, | |
579 | EVP_PKEY_EC, | |
580 | 0, | |
581 | "EC", | |
582 | "OpenSSL EC algorithm", | |
583 | ||
584 | eckey_pub_decode, | |
585 | eckey_pub_encode, | |
586 | eckey_pub_cmp, | |
587 | eckey_pub_print, | |
588 | ||
589 | eckey_priv_decode, | |
590 | eckey_priv_encode, | |
591 | eckey_priv_print, | |
592 | ||
593 | int_ec_size, | |
594 | ec_bits, | |
595 | ec_security_bits, | |
596 | ||
597 | eckey_param_decode, | |
598 | eckey_param_encode, | |
599 | ec_missing_parameters, | |
600 | ec_copy_parameters, | |
601 | ec_cmp_parameters, | |
602 | eckey_param_print, | |
603 | 0, | |
604 | ||
605 | int_ec_free, | |
606 | ec_pkey_ctrl, | |
607 | old_ec_priv_decode, | |
2aee35d3 PY |
608 | old_ec_priv_encode, |
609 | ||
610 | 0, 0, 0, | |
611 | ||
b0004708 PY |
612 | ec_pkey_check, |
613 | ec_pkey_public_check, | |
614 | ec_pkey_param_check | |
0f113f3e | 615 | }; |
88e20b85 | 616 | |
ddb634fe JL |
617 | #if !defined(OPENSSL_NO_SM2) |
618 | const EVP_PKEY_ASN1_METHOD sm2_asn1_meth = { | |
619 | EVP_PKEY_SM2, | |
620 | EVP_PKEY_EC, | |
621 | ASN1_PKEY_ALIAS | |
622 | }; | |
623 | #endif | |
624 | ||
dca5eeb4 RS |
625 | int EC_KEY_print(BIO *bp, const EC_KEY *x, int off) |
626 | { | |
627 | int private = EC_KEY_get0_private_key(x) != NULL; | |
628 | ||
629 | return do_EC_KEY_print(bp, x, off, | |
a66069db | 630 | private ? EC_KEY_PRINT_PRIVATE : EC_KEY_PRINT_PUBLIC); |
dca5eeb4 RS |
631 | } |
632 | ||
633 | int ECParameters_print(BIO *bp, const EC_KEY *x) | |
634 | { | |
635 | return do_EC_KEY_print(bp, x, 4, EC_KEY_PRINT_PARAM); | |
636 | } | |
637 | ||
88e20b85 DSH |
638 | #ifndef OPENSSL_NO_CMS |
639 | ||
640 | static int ecdh_cms_set_peerkey(EVP_PKEY_CTX *pctx, | |
0f113f3e MC |
641 | X509_ALGOR *alg, ASN1_BIT_STRING *pubkey) |
642 | { | |
ac4e2577 | 643 | const ASN1_OBJECT *aoid; |
0f113f3e | 644 | int atype; |
ac4e2577 | 645 | const void *aval; |
0f113f3e MC |
646 | int rv = 0; |
647 | EVP_PKEY *pkpeer = NULL; | |
648 | EC_KEY *ecpeer = NULL; | |
649 | const unsigned char *p; | |
650 | int plen; | |
651 | X509_ALGOR_get0(&aoid, &atype, &aval, alg); | |
652 | if (OBJ_obj2nid(aoid) != NID_X9_62_id_ecPublicKey) | |
653 | goto err; | |
654 | /* If absent parameters get group from main key */ | |
655 | if (atype == V_ASN1_UNDEF || atype == V_ASN1_NULL) { | |
656 | const EC_GROUP *grp; | |
657 | EVP_PKEY *pk; | |
658 | pk = EVP_PKEY_CTX_get0_pkey(pctx); | |
12a765a5 | 659 | if (pk == NULL) |
0f113f3e MC |
660 | goto err; |
661 | grp = EC_KEY_get0_group(pk->pkey.ec); | |
662 | ecpeer = EC_KEY_new(); | |
90945fa3 | 663 | if (ecpeer == NULL) |
0f113f3e MC |
664 | goto err; |
665 | if (!EC_KEY_set_group(ecpeer, grp)) | |
666 | goto err; | |
667 | } else { | |
668 | ecpeer = eckey_type2param(atype, aval); | |
669 | if (!ecpeer) | |
670 | goto err; | |
671 | } | |
672 | /* We have parameters now set public key */ | |
673 | plen = ASN1_STRING_length(pubkey); | |
17ebf85a | 674 | p = ASN1_STRING_get0_data(pubkey); |
12a765a5 | 675 | if (p == NULL || plen == 0) |
0f113f3e MC |
676 | goto err; |
677 | if (!o2i_ECPublicKey(&ecpeer, &p, plen)) | |
678 | goto err; | |
679 | pkpeer = EVP_PKEY_new(); | |
90945fa3 | 680 | if (pkpeer == NULL) |
0f113f3e MC |
681 | goto err; |
682 | EVP_PKEY_set1_EC_KEY(pkpeer, ecpeer); | |
683 | if (EVP_PKEY_derive_set_peer(pctx, pkpeer) > 0) | |
684 | rv = 1; | |
685 | err: | |
8fdc3734 | 686 | EC_KEY_free(ecpeer); |
c5ba2d99 | 687 | EVP_PKEY_free(pkpeer); |
0f113f3e MC |
688 | return rv; |
689 | } | |
690 | ||
88e20b85 DSH |
691 | /* Set KDF parameters based on KDF NID */ |
692 | static int ecdh_cms_set_kdf_param(EVP_PKEY_CTX *pctx, int eckdf_nid) | |
0f113f3e MC |
693 | { |
694 | int kdf_nid, kdfmd_nid, cofactor; | |
695 | const EVP_MD *kdf_md; | |
696 | if (eckdf_nid == NID_undef) | |
697 | return 0; | |
698 | ||
699 | /* Lookup KDF type, cofactor mode and digest */ | |
700 | if (!OBJ_find_sigid_algs(eckdf_nid, &kdfmd_nid, &kdf_nid)) | |
701 | return 0; | |
702 | ||
703 | if (kdf_nid == NID_dh_std_kdf) | |
704 | cofactor = 0; | |
705 | else if (kdf_nid == NID_dh_cofactor_kdf) | |
706 | cofactor = 1; | |
707 | else | |
708 | return 0; | |
709 | ||
710 | if (EVP_PKEY_CTX_set_ecdh_cofactor_mode(pctx, cofactor) <= 0) | |
711 | return 0; | |
712 | ||
ffd89124 | 713 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_X9_63) <= 0) |
0f113f3e MC |
714 | return 0; |
715 | ||
716 | kdf_md = EVP_get_digestbynid(kdfmd_nid); | |
717 | if (!kdf_md) | |
718 | return 0; | |
719 | ||
720 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
721 | return 0; | |
722 | return 1; | |
723 | } | |
88e20b85 | 724 | |
88e20b85 | 725 | static int ecdh_cms_set_shared_info(EVP_PKEY_CTX *pctx, CMS_RecipientInfo *ri) |
0f113f3e MC |
726 | { |
727 | int rv = 0; | |
728 | ||
729 | X509_ALGOR *alg, *kekalg = NULL; | |
730 | ASN1_OCTET_STRING *ukm; | |
731 | const unsigned char *p; | |
732 | unsigned char *der = NULL; | |
733 | int plen, keylen; | |
734 | const EVP_CIPHER *kekcipher; | |
735 | EVP_CIPHER_CTX *kekctx; | |
736 | ||
737 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &alg, &ukm)) | |
738 | return 0; | |
739 | ||
740 | if (!ecdh_cms_set_kdf_param(pctx, OBJ_obj2nid(alg->algorithm))) { | |
741 | ECerr(EC_F_ECDH_CMS_SET_SHARED_INFO, EC_R_KDF_PARAMETER_ERROR); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | if (alg->parameter->type != V_ASN1_SEQUENCE) | |
746 | return 0; | |
747 | ||
748 | p = alg->parameter->value.sequence->data; | |
749 | plen = alg->parameter->value.sequence->length; | |
750 | kekalg = d2i_X509_ALGOR(NULL, &p, plen); | |
751 | if (!kekalg) | |
752 | goto err; | |
753 | kekctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
754 | if (!kekctx) | |
755 | goto err; | |
756 | kekcipher = EVP_get_cipherbyobj(kekalg->algorithm); | |
757 | if (!kekcipher || EVP_CIPHER_mode(kekcipher) != EVP_CIPH_WRAP_MODE) | |
758 | goto err; | |
759 | if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL)) | |
760 | goto err; | |
761 | if (EVP_CIPHER_asn1_to_param(kekctx, kekalg->parameter) <= 0) | |
762 | goto err; | |
763 | ||
764 | keylen = EVP_CIPHER_CTX_key_length(kekctx); | |
765 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
766 | goto err; | |
767 | ||
768 | plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen); | |
769 | ||
770 | if (!plen) | |
771 | goto err; | |
772 | ||
773 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, der, plen) <= 0) | |
774 | goto err; | |
775 | der = NULL; | |
776 | ||
777 | rv = 1; | |
778 | err: | |
222561fe RS |
779 | X509_ALGOR_free(kekalg); |
780 | OPENSSL_free(der); | |
0f113f3e MC |
781 | return rv; |
782 | } | |
88e20b85 DSH |
783 | |
784 | static int ecdh_cms_decrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
785 | { |
786 | EVP_PKEY_CTX *pctx; | |
787 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
788 | if (!pctx) | |
789 | return 0; | |
790 | /* See if we need to set peer key */ | |
791 | if (!EVP_PKEY_CTX_get0_peerkey(pctx)) { | |
792 | X509_ALGOR *alg; | |
793 | ASN1_BIT_STRING *pubkey; | |
794 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &alg, &pubkey, | |
795 | NULL, NULL, NULL)) | |
796 | return 0; | |
797 | if (!alg || !pubkey) | |
798 | return 0; | |
799 | if (!ecdh_cms_set_peerkey(pctx, alg, pubkey)) { | |
800 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_PEER_KEY_ERROR); | |
801 | return 0; | |
802 | } | |
803 | } | |
804 | /* Set ECDH derivation parameters and initialise unwrap context */ | |
805 | if (!ecdh_cms_set_shared_info(pctx, ri)) { | |
806 | ECerr(EC_F_ECDH_CMS_DECRYPT, EC_R_SHARED_INFO_ERROR); | |
807 | return 0; | |
808 | } | |
809 | return 1; | |
810 | } | |
88e20b85 DSH |
811 | |
812 | static int ecdh_cms_encrypt(CMS_RecipientInfo *ri) | |
0f113f3e MC |
813 | { |
814 | EVP_PKEY_CTX *pctx; | |
815 | EVP_PKEY *pkey; | |
816 | EVP_CIPHER_CTX *ctx; | |
817 | int keylen; | |
818 | X509_ALGOR *talg, *wrap_alg = NULL; | |
ac4e2577 | 819 | const ASN1_OBJECT *aoid; |
0f113f3e MC |
820 | ASN1_BIT_STRING *pubkey; |
821 | ASN1_STRING *wrap_str; | |
822 | ASN1_OCTET_STRING *ukm; | |
823 | unsigned char *penc = NULL; | |
824 | int penclen; | |
825 | int rv = 0; | |
826 | int ecdh_nid, kdf_type, kdf_nid, wrap_nid; | |
827 | const EVP_MD *kdf_md; | |
828 | pctx = CMS_RecipientInfo_get0_pkey_ctx(ri); | |
829 | if (!pctx) | |
830 | return 0; | |
831 | /* Get ephemeral key */ | |
832 | pkey = EVP_PKEY_CTX_get0_pkey(pctx); | |
833 | if (!CMS_RecipientInfo_kari_get0_orig_id(ri, &talg, &pubkey, | |
834 | NULL, NULL, NULL)) | |
835 | goto err; | |
836 | X509_ALGOR_get0(&aoid, NULL, NULL, talg); | |
837 | /* Is everything uninitialised? */ | |
838 | if (aoid == OBJ_nid2obj(NID_undef)) { | |
839 | ||
840 | EC_KEY *eckey = pkey->pkey.ec; | |
841 | /* Set the key */ | |
842 | unsigned char *p; | |
843 | ||
844 | penclen = i2o_ECPublicKey(eckey, NULL); | |
845 | if (penclen <= 0) | |
846 | goto err; | |
847 | penc = OPENSSL_malloc(penclen); | |
90945fa3 | 848 | if (penc == NULL) |
0f113f3e MC |
849 | goto err; |
850 | p = penc; | |
851 | penclen = i2o_ECPublicKey(eckey, &p); | |
852 | if (penclen <= 0) | |
853 | goto err; | |
854 | ASN1_STRING_set0(pubkey, penc, penclen); | |
855 | pubkey->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
856 | pubkey->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
857 | ||
858 | penc = NULL; | |
859 | X509_ALGOR_set0(talg, OBJ_nid2obj(NID_X9_62_id_ecPublicKey), | |
860 | V_ASN1_UNDEF, NULL); | |
861 | } | |
862 | ||
0d4fb843 | 863 | /* See if custom parameters set */ |
0f113f3e MC |
864 | kdf_type = EVP_PKEY_CTX_get_ecdh_kdf_type(pctx); |
865 | if (kdf_type <= 0) | |
866 | goto err; | |
867 | if (!EVP_PKEY_CTX_get_ecdh_kdf_md(pctx, &kdf_md)) | |
868 | goto err; | |
869 | ecdh_nid = EVP_PKEY_CTX_get_ecdh_cofactor_mode(pctx); | |
870 | if (ecdh_nid < 0) | |
871 | goto err; | |
872 | else if (ecdh_nid == 0) | |
873 | ecdh_nid = NID_dh_std_kdf; | |
874 | else if (ecdh_nid == 1) | |
875 | ecdh_nid = NID_dh_cofactor_kdf; | |
876 | ||
877 | if (kdf_type == EVP_PKEY_ECDH_KDF_NONE) { | |
ffd89124 | 878 | kdf_type = EVP_PKEY_ECDH_KDF_X9_63; |
0f113f3e MC |
879 | if (EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, kdf_type) <= 0) |
880 | goto err; | |
881 | } else | |
0d4fb843 | 882 | /* Unknown KDF */ |
0f113f3e MC |
883 | goto err; |
884 | if (kdf_md == NULL) { | |
885 | /* Fixme later for better MD */ | |
886 | kdf_md = EVP_sha1(); | |
887 | if (EVP_PKEY_CTX_set_ecdh_kdf_md(pctx, kdf_md) <= 0) | |
888 | goto err; | |
889 | } | |
890 | ||
891 | if (!CMS_RecipientInfo_kari_get0_alg(ri, &talg, &ukm)) | |
892 | goto err; | |
893 | ||
894 | /* Lookup NID for KDF+cofactor+digest */ | |
895 | ||
896 | if (!OBJ_find_sigid_by_algs(&kdf_nid, EVP_MD_type(kdf_md), ecdh_nid)) | |
897 | goto err; | |
898 | /* Get wrap NID */ | |
899 | ctx = CMS_RecipientInfo_kari_get0_ctx(ri); | |
900 | wrap_nid = EVP_CIPHER_CTX_type(ctx); | |
901 | keylen = EVP_CIPHER_CTX_key_length(ctx); | |
902 | ||
903 | /* Package wrap algorithm in an AlgorithmIdentifier */ | |
904 | ||
905 | wrap_alg = X509_ALGOR_new(); | |
90945fa3 | 906 | if (wrap_alg == NULL) |
0f113f3e MC |
907 | goto err; |
908 | wrap_alg->algorithm = OBJ_nid2obj(wrap_nid); | |
909 | wrap_alg->parameter = ASN1_TYPE_new(); | |
90945fa3 | 910 | if (wrap_alg->parameter == NULL) |
0f113f3e MC |
911 | goto err; |
912 | if (EVP_CIPHER_param_to_asn1(ctx, wrap_alg->parameter) <= 0) | |
913 | goto err; | |
914 | if (ASN1_TYPE_get(wrap_alg->parameter) == NID_undef) { | |
915 | ASN1_TYPE_free(wrap_alg->parameter); | |
916 | wrap_alg->parameter = NULL; | |
917 | } | |
918 | ||
919 | if (EVP_PKEY_CTX_set_ecdh_kdf_outlen(pctx, keylen) <= 0) | |
920 | goto err; | |
921 | ||
922 | penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen); | |
923 | ||
924 | if (!penclen) | |
925 | goto err; | |
926 | ||
927 | if (EVP_PKEY_CTX_set0_ecdh_kdf_ukm(pctx, penc, penclen) <= 0) | |
928 | goto err; | |
929 | penc = NULL; | |
930 | ||
931 | /* | |
932 | * Now need to wrap encoding of wrap AlgorithmIdentifier into parameter | |
933 | * of another AlgorithmIdentifier. | |
934 | */ | |
935 | penclen = i2d_X509_ALGOR(wrap_alg, &penc); | |
936 | if (!penc || !penclen) | |
937 | goto err; | |
938 | wrap_str = ASN1_STRING_new(); | |
90945fa3 | 939 | if (wrap_str == NULL) |
0f113f3e MC |
940 | goto err; |
941 | ASN1_STRING_set0(wrap_str, penc, penclen); | |
942 | penc = NULL; | |
943 | X509_ALGOR_set0(talg, OBJ_nid2obj(kdf_nid), V_ASN1_SEQUENCE, wrap_str); | |
944 | ||
945 | rv = 1; | |
946 | ||
947 | err: | |
222561fe RS |
948 | OPENSSL_free(penc); |
949 | X509_ALGOR_free(wrap_alg); | |
0f113f3e MC |
950 | return rv; |
951 | } | |
88e20b85 DSH |
952 | |
953 | #endif |