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source: vbox/trunk/src/libs/openssl-1.1.1j/crypto/ec/ec_kmeth.c@ 88461

Last change on this file since 88461 was 87984, checked in by vboxsync, 4 years ago

openssl-1.1.1j: Applied and adjusted our OpenSSL changes to 1.1.1j. bugref:9963
File size: 10.4 KB
Line 
1/*
2 * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <string.h>
11#include <openssl/ec.h>
12#include <openssl/engine.h>
13#include <openssl/err.h>
14#include "ec_local.h"
15
16
17static const EC_KEY_METHOD openssl_ec_key_method = {
18 "OpenSSL EC_KEY method",
19 0,
20 0,0,0,0,0,0,
21 ossl_ec_key_gen,
22 ossl_ecdh_compute_key,
23 ossl_ecdsa_sign,
24 ossl_ecdsa_sign_setup,
25 ossl_ecdsa_sign_sig,
26 ossl_ecdsa_verify,
27 ossl_ecdsa_verify_sig
28};
29
30static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
31
32const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
33{
34 return &openssl_ec_key_method;
35}
36
37const EC_KEY_METHOD *EC_KEY_get_default_method(void)
38{
39 return default_ec_key_meth;
40}
41
42void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
43{
44 if (meth == NULL)
45 default_ec_key_meth = &openssl_ec_key_method;
46 else
47 default_ec_key_meth = meth;
48}
49
50const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
51{
52 return key->meth;
53}
54
55int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
56{
57 void (*finish)(EC_KEY *key) = key->meth->finish;
58
59 if (finish != NULL)
60 finish(key);
61
62#ifndef OPENSSL_NO_ENGINE
63 ENGINE_finish(key->engine);
64 key->engine = NULL;
65#endif
66
67 key->meth = meth;
68 if (meth->init != NULL)
69 return meth->init(key);
70 return 1;
71}
72
73EC_KEY *EC_KEY_new_method(ENGINE *engine)
74{
75 EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
76
77 if (ret == NULL) {
78 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
79 return NULL;
80 }
81
82 ret->references = 1;
83 ret->lock = CRYPTO_THREAD_lock_new();
84 if (ret->lock == NULL) {
85 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
86 OPENSSL_free(ret);
87 return NULL;
88 }
89
90 ret->meth = EC_KEY_get_default_method();
91#ifndef OPENSSL_NO_ENGINE
92 if (engine != NULL) {
93 if (!ENGINE_init(engine)) {
94 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
95 goto err;
96 }
97 ret->engine = engine;
98 } else
99 ret->engine = ENGINE_get_default_EC();
100 if (ret->engine != NULL) {
101 ret->meth = ENGINE_get_EC(ret->engine);
102 if (ret->meth == NULL) {
103 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
104 goto err;
105 }
106 }
107#endif
108
109 ret->version = 1;
110 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
111
112 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
113 goto err;
114 }
115
116 if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
117 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_INIT_FAIL);
118 goto err;
119 }
120 return ret;
121
122 err:
123 EC_KEY_free(ret);
124 return NULL;
125}
126
127int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
128 const EC_KEY *eckey,
129 void *(*KDF) (const void *in, size_t inlen, void *out,
130 size_t *outlen))
131{
132 unsigned char *sec = NULL;
133 size_t seclen;
134 if (eckey->meth->compute_key == NULL) {
135 ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
136 return 0;
137 }
138 if (outlen > INT_MAX) {
139 ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_INVALID_OUTPUT_LENGTH);
140 return 0;
141 }
142 if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
143 return 0;
144 if (KDF != NULL) {
145 KDF(sec, seclen, out, &outlen);
146 } else {
147 if (outlen > seclen)
148 outlen = seclen;
149 memcpy(out, sec, outlen);
150 }
151 OPENSSL_clear_free(sec, seclen);
152 return outlen;
153}
154
155EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
156{
157 EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
158
159 if (ret == NULL)
160 return NULL;
161 if (meth != NULL)
162 *ret = *meth;
163 ret->flags |= EC_KEY_METHOD_DYNAMIC;
164 return ret;
165}
166
167void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
168{
169 if (meth->flags & EC_KEY_METHOD_DYNAMIC)
170 OPENSSL_free(meth);
171}
172
173void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
174 int (*init)(EC_KEY *key),
175 void (*finish)(EC_KEY *key),
176 int (*copy)(EC_KEY *dest, const EC_KEY *src),
177 int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
178 int (*set_private)(EC_KEY *key,
179 const BIGNUM *priv_key),
180 int (*set_public)(EC_KEY *key,
181 const EC_POINT *pub_key))
182{
183 meth->init = init;
184 meth->finish = finish;
185 meth->copy = copy;
186 meth->set_group = set_group;
187 meth->set_private = set_private;
188 meth->set_public = set_public;
189}
190
191void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
192 int (*keygen)(EC_KEY *key))
193{
194 meth->keygen = keygen;
195}
196
197void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
198 int (*ckey)(unsigned char **psec,
199 size_t *pseclen,
200 const EC_POINT *pub_key,
201 const EC_KEY *ecdh))
202{
203 meth->compute_key = ckey;
204}
205
206void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
207 int (*sign)(int type, const unsigned char *dgst,
208 int dlen, unsigned char *sig,
209 unsigned int *siglen,
210 const BIGNUM *kinv, const BIGNUM *r,
211 EC_KEY *eckey),
212 int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
213 BIGNUM **kinvp, BIGNUM **rp),
214 ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
215 int dgst_len,
216 const BIGNUM *in_kinv,
217 const BIGNUM *in_r,
218 EC_KEY *eckey))
219{
220 meth->sign = sign;
221 meth->sign_setup = sign_setup;
222 meth->sign_sig = sign_sig;
223}
224
225void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
226 int (*verify)(int type, const unsigned
227 char *dgst, int dgst_len,
228 const unsigned char *sigbuf,
229 int sig_len, EC_KEY *eckey),
230 int (*verify_sig)(const unsigned char *dgst,
231 int dgst_len,
232 const ECDSA_SIG *sig,
233 EC_KEY *eckey))
234{
235 meth->verify = verify;
236 meth->verify_sig = verify_sig;
237}
238
239void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
240 int (**pinit)(EC_KEY *key),
241 void (**pfinish)(EC_KEY *key),
242 int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
243 int (**pset_group)(EC_KEY *key,
244 const EC_GROUP *grp),
245 int (**pset_private)(EC_KEY *key,
246 const BIGNUM *priv_key),
247 int (**pset_public)(EC_KEY *key,
248 const EC_POINT *pub_key))
249{
250 if (pinit != NULL)
251 *pinit = meth->init;
252 if (pfinish != NULL)
253 *pfinish = meth->finish;
254 if (pcopy != NULL)
255 *pcopy = meth->copy;
256 if (pset_group != NULL)
257 *pset_group = meth->set_group;
258 if (pset_private != NULL)
259 *pset_private = meth->set_private;
260 if (pset_public != NULL)
261 *pset_public = meth->set_public;
262}
263
264void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
265 int (**pkeygen)(EC_KEY *key))
266{
267 if (pkeygen != NULL)
268 *pkeygen = meth->keygen;
269}
270
271void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
272 int (**pck)(unsigned char **pout,
273 size_t *poutlen,
274 const EC_POINT *pub_key,
275 const EC_KEY *ecdh))
276{
277 if (pck != NULL)
278 *pck = meth->compute_key;
279}
280
281void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
282 int (**psign)(int type, const unsigned char *dgst,
283 int dlen, unsigned char *sig,
284 unsigned int *siglen,
285 const BIGNUM *kinv, const BIGNUM *r,
286 EC_KEY *eckey),
287 int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
288 BIGNUM **kinvp, BIGNUM **rp),
289 ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
290 int dgst_len,
291 const BIGNUM *in_kinv,
292 const BIGNUM *in_r,
293 EC_KEY *eckey))
294{
295 if (psign != NULL)
296 *psign = meth->sign;
297 if (psign_setup != NULL)
298 *psign_setup = meth->sign_setup;
299 if (psign_sig != NULL)
300 *psign_sig = meth->sign_sig;
301}
302
303void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
304 int (**pverify)(int type, const unsigned
305 char *dgst, int dgst_len,
306 const unsigned char *sigbuf,
307 int sig_len, EC_KEY *eckey),
308 int (**pverify_sig)(const unsigned char *dgst,
309 int dgst_len,
310 const ECDSA_SIG *sig,
311 EC_KEY *eckey))
312{
313 if (pverify != NULL)
314 *pverify = meth->verify;
315 if (pverify_sig != NULL)
316 *pverify_sig = meth->verify_sig;
317}
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