1 /* crypto/ec/ec_kmeth.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
55 #include <openssl/ec.h>
56 #ifndef OPENSSL_NO_ENGINE
57 # include <openssl/engine.h>
59 #include <openssl/err.h>
63 static const EC_KEY_METHOD openssl_ec_key_method = {
64 "OpenSSL EC_KEY method",
68 ossl_ecdh_compute_key,
69 ossl_ecdsa_sign_setup,
74 const EC_KEY_METHOD *default_ec_key_meth = &openssl_ec_key_method;
76 const EC_KEY_METHOD *EC_KEY_OpenSSL(void)
78 return &openssl_ec_key_method;
81 const EC_KEY_METHOD *EC_KEY_get_default_method(void)
83 return default_ec_key_meth;
86 void EC_KEY_set_default_method(const EC_KEY_METHOD *meth)
89 default_ec_key_meth = &openssl_ec_key_method;
91 default_ec_key_meth = meth;
94 EC_KEY *EC_KEY_new_method(ENGINE *engine)
96 EC_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
99 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_MALLOC_FAILURE);
102 ret->meth = EC_KEY_get_default_method();
103 #ifndef OPENSSL_NO_ENGINE
105 if (!ENGINE_init(engine)) {
106 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
110 ret->engine = engine;
112 ret->engine = ENGINE_get_default_EC();
114 ret->meth = ENGINE_get_EC(ret->engine);
116 ECerr(EC_F_EC_KEY_NEW_METHOD, ERR_R_ENGINE_LIB);
117 ENGINE_finish(ret->engine);
125 ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
127 if (ret->meth->init && ret->meth->init(ret) == 0) {
134 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
136 void *(*KDF) (const void *in, size_t inlen, void *out,
139 if (eckey->meth->compute_key)
140 return eckey->meth->compute_key(out, outlen, pub_key, eckey, KDF);
141 ECerr(EC_F_ECDH_COMPUTE_KEY, EC_R_OPERATION_NOT_SUPPORTED);