1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
|
/*
* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <openssl/ec.h>
#include <openssl/engine.h>
#include <openssl/err.h>
#include "ec_local.h"
static const EC_KEY_METHOD openssl_ec_key_method = {
"OpenSSL EC_KEY method",
0,
0,0,0,0,0,0,
ossl_ec_key_gen,
ossl_ecdh_compute_key,
ossl_ecdsa_sign,
ossl_ecdsa_sign_setup,
ossl_ecdsa_sign_sig,
ossl_ecdsa_verify,
ossl_ecdsa_verify_sig
};
static const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
{
return &openssl_ec_key_method;
}
const EC_KEY_METHOD *EC_KEY_get_default_method(void)
{
return default_ec_key_meth;
}
void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
{
if (meth == NULL)
default_ec_key_meth = &openssl_ec_key_method;
else
default_ec_key_meth = meth;
}
const EC_KEY_METHOD *EC_KEY_get_method(const EC_KEY *key)
{
return key->meth;
}
int EC_KEY_set_method(EC_KEY *key, const EC_KEY_METHOD *meth)
{
void (*finish)(EC_KEY *key) = key->meth->finish;
if (finish != NULL)
finish(key);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(key->engine);
key->engine = NULL;
#endif
key->meth = meth;
if (meth->init != NULL)
return meth->init(key);
return 1;
}
EC_KEY *EC_KEY_new_method(ENGINE *engine)
{
EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
return NULL;
}
ret->references = 1;
ret->lock = CRYPTO_THREAD_lock_new();
if (ret->lock == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
OPENSSL_free(ret);
return NULL;
}
ret->meth = EC_KEY_get_default_method();
#ifndef OPENSSL_NO_ENGINE
if (engine != NULL) {
if (!ENGINE_init(engine)) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
goto err;
}
ret->engine = engine;
} else
ret->engine = ENGINE_get_default_EC();
if (ret->engine != NULL) {
ret->meth = ENGINE_get_EC(ret->engine);
if (ret->meth == NULL) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
goto err;
}
}
#endif
ret->version = 1;
ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_EC_KEY, ret, &ret->ex_data)) {
goto err;
}
if (ret->meth->init != NULL && ret->meth->init(ret) == 0) {
ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_INIT_FAIL);
goto err;
}
return ret;
err:
EC_KEY_free(ret);
return NULL;
}
int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
const EC_KEY *eckey,
void *(*KDF) (const void *in, size_t inlen, void *out,
size_t *outlen))
{
unsigned char *sec = NULL;
size_t seclen;
if (eckey->meth->compute_key == NULL) {
ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);
return 0;
}
if (outlen > INT_MAX) {
ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_INVALID_OUTPUT_LENGTH);
return 0;
}
if (!eckey->meth->compute_key(&sec, &seclen, pub_key, eckey))
return 0;
if (KDF != NULL) {
KDF(sec, seclen, out, &outlen);
} else {
if (outlen > seclen)
outlen = seclen;
memcpy(out, sec, outlen);
}
OPENSSL_clear_free(sec, seclen);
return outlen;
}
EC_KEY_METHOD *EC_KEY_METHOD_new(const EC_KEY_METHOD *meth)
{
EC_KEY_METHOD *ret = OPENSSL_zalloc(sizeof(*meth));
if (ret == NULL)
return NULL;
if (meth != NULL)
*ret = *meth;
ret->flags |= EC_KEY_METHOD_DYNAMIC;
return ret;
}
void EC_KEY_METHOD_free(EC_KEY_METHOD *meth)
{
if (meth->flags & EC_KEY_METHOD_DYNAMIC)
OPENSSL_free(meth);
}
void EC_KEY_METHOD_set_init(EC_KEY_METHOD *meth,
int (*init)(EC_KEY *key),
void (*finish)(EC_KEY *key),
int (*copy)(EC_KEY *dest, const EC_KEY *src),
int (*set_group)(EC_KEY *key, const EC_GROUP *grp),
int (*set_private)(EC_KEY *key,
const BIGNUM *priv_key),
int (*set_public)(EC_KEY *key,
const EC_POINT *pub_key))
{
meth->init = init;
meth->finish = finish;
meth->copy = copy;
meth->set_group = set_group;
meth->set_private = set_private;
meth->set_public = set_public;
}
void EC_KEY_METHOD_set_keygen(EC_KEY_METHOD *meth,
int (*keygen)(EC_KEY *key))
{
meth->keygen = keygen;
}
void EC_KEY_METHOD_set_compute_key(EC_KEY_METHOD *meth,
int (*ckey)(unsigned char **psec,
size_t *pseclen,
const EC_POINT *pub_key,
const EC_KEY *ecdh))
{
meth->compute_key = ckey;
}
void EC_KEY_METHOD_set_sign(EC_KEY_METHOD *meth,
int (*sign)(int type, const unsigned char *dgst,
int dlen, unsigned char *sig,
unsigned int *siglen,
const BIGNUM *kinv, const BIGNUM *r,
EC_KEY *eckey),
int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
BIGNUM **kinvp, BIGNUM **rp),
ECDSA_SIG *(*sign_sig)(const unsigned char *dgst,
int dgst_len,
const BIGNUM *in_kinv,
const BIGNUM *in_r,
EC_KEY *eckey))
{
meth->sign = sign;
meth->sign_setup = sign_setup;
meth->sign_sig = sign_sig;
}
void EC_KEY_METHOD_set_verify(EC_KEY_METHOD *meth,
int (*verify)(int type, const unsigned
char *dgst, int dgst_len,
const unsigned char *sigbuf,
int sig_len, EC_KEY *eckey),
int (*verify_sig)(const unsigned char *dgst,
int dgst_len,
const ECDSA_SIG *sig,
EC_KEY *eckey))
{
meth->verify = verify;
meth->verify_sig = verify_sig;
}
void EC_KEY_METHOD_get_init(const EC_KEY_METHOD *meth,
int (**pinit)(EC_KEY *key),
void (**pfinish)(EC_KEY *key),
int (**pcopy)(EC_KEY *dest, const EC_KEY *src),
int (**pset_group)(EC_KEY *key,
const EC_GROUP *grp),
int (**pset_private)(EC_KEY *key,
const BIGNUM *priv_key),
int (**pset_public)(EC_KEY *key,
const EC_POINT *pub_key))
{
if (pinit != NULL)
*pinit = meth->init;
if (pfinish != NULL)
*pfinish = meth->finish;
if (pcopy != NULL)
*pcopy = meth->copy;
if (pset_group != NULL)
*pset_group = meth->set_group;
if (pset_private != NULL)
*pset_private = meth->set_private;
if (pset_public != NULL)
*pset_public = meth->set_public;
}
void EC_KEY_METHOD_get_keygen(const EC_KEY_METHOD *meth,
int (**pkeygen)(EC_KEY *key))
{
if (pkeygen != NULL)
*pkeygen = meth->keygen;
}
void EC_KEY_METHOD_get_compute_key(const EC_KEY_METHOD *meth,
int (**pck)(unsigned char **pout,
size_t *poutlen,
const EC_POINT *pub_key,
const EC_KEY *ecdh))
{
if (pck != NULL)
*pck = meth->compute_key;
}
void EC_KEY_METHOD_get_sign(const EC_KEY_METHOD *meth,
int (**psign)(int type, const unsigned char *dgst,
int dlen, unsigned char *sig,
unsigned int *siglen,
const BIGNUM *kinv, const BIGNUM *r,
EC_KEY *eckey),
int (**psign_setup)(EC_KEY *eckey, BN_CTX *ctx_in,
BIGNUM **kinvp, BIGNUM **rp),
ECDSA_SIG *(**psign_sig)(const unsigned char *dgst,
int dgst_len,
const BIGNUM *in_kinv,
const BIGNUM *in_r,
EC_KEY *eckey))
{
if (psign != NULL)
*psign = meth->sign;
if (psign_setup != NULL)
*psign_setup = meth->sign_setup;
if (psign_sig != NULL)
*psign_sig = meth->sign_sig;
}
void EC_KEY_METHOD_get_verify(const EC_KEY_METHOD *meth,
int (**pverify)(int type, const unsigned
char *dgst, int dgst_len,
const unsigned char *sigbuf,
int sig_len, EC_KEY *eckey),
int (**pverify_sig)(const unsigned char *dgst,
int dgst_len,
const ECDSA_SIG *sig,
EC_KEY *eckey))
{
if (pverify != NULL)
*pverify = meth->verify;
if (pverify_sig != NULL)
*pverify_sig = meth->verify_sig;
}
|
