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e172d60d BM |
1 | /* crypto/ecdh/ech_lib.c */ |
2 | /* ==================================================================== | |
3 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
4 | * | |
5 | * The Elliptic Curve Public-Key Crypto Library (ECC Code) included | |
6 | * herein is developed by SUN MICROSYSTEMS, INC., and is contributed | |
7 | * to the OpenSSL project. | |
8 | * | |
9 | * The ECC Code is licensed pursuant to the OpenSSL open source | |
10 | * license provided below. | |
11 | * | |
e172d60d BM |
12 | * The ECDH software is originally written by Douglas Stebila of |
13 | * Sun Microsystems Laboratories. | |
14 | * | |
15 | */ | |
16 | /* ==================================================================== | |
176f31dd | 17 | * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
e172d60d BM |
18 | * |
19 | * Redistribution and use in source and binary forms, with or without | |
20 | * modification, are permitted provided that the following conditions | |
21 | * are met: | |
22 | * | |
23 | * 1. Redistributions of source code must retain the above copyright | |
40720ce3 | 24 | * notice, this list of conditions and the following disclaimer. |
e172d60d BM |
25 | * |
26 | * 2. Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * | |
31 | * 3. All advertising materials mentioning features or use of this | |
32 | * software must display the following acknowledgment: | |
33 | * "This product includes software developed by the OpenSSL Project | |
34 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
35 | * | |
36 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
37 | * endorse or promote products derived from this software without | |
38 | * prior written permission. For written permission, please contact | |
39 | * openssl-core@OpenSSL.org. | |
40 | * | |
41 | * 5. Products derived from this software may not be called "OpenSSL" | |
42 | * nor may "OpenSSL" appear in their names without prior written | |
43 | * permission of the OpenSSL Project. | |
44 | * | |
45 | * 6. Redistributions of any form whatsoever must retain the following | |
46 | * acknowledgment: | |
47 | * "This product includes software developed by the OpenSSL Project | |
48 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
51 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
52 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
53 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
54 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
56 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
57 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
58 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
59 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
60 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
61 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
62 | * ==================================================================== | |
63 | * | |
64 | * This product includes cryptographic software written by Eric Young | |
65 | * (eay@cryptsoft.com). This product includes software written by Tim | |
66 | * Hudson (tjh@cryptsoft.com). | |
67 | * | |
68 | */ | |
69 | ||
6a50d0a4 | 70 | #include "ech_locl.h" |
e172d60d | 71 | #include <string.h> |
58ae65cd | 72 | #ifndef OPENSSL_NO_ENGINE |
40720ce3 | 73 | # include <openssl/engine.h> |
58ae65cd | 74 | #endif |
60a938c6 | 75 | #include <openssl/err.h> |
e172d60d | 76 | |
40720ce3 | 77 | const char ECDH_version[] = "ECDH" OPENSSL_VERSION_PTEXT; |
e172d60d | 78 | |
e172d60d BM |
79 | static const ECDH_METHOD *default_ECDH_method = NULL; |
80 | ||
aff2922f | 81 | static void *ecdh_data_new(void); |
9dd84053 | 82 | static void *ecdh_data_dup(void *); |
40720ce3 | 83 | static void ecdh_data_free(void *); |
9dd84053 | 84 | |
e172d60d | 85 | void ECDH_set_default_method(const ECDH_METHOD *meth) |
40720ce3 MC |
86 | { |
87 | default_ECDH_method = meth; | |
88 | } | |
e172d60d BM |
89 | |
90 | const ECDH_METHOD *ECDH_get_default_method(void) | |
40720ce3 MC |
91 | { |
92 | if (!default_ECDH_method) | |
93 | default_ECDH_method = ECDH_OpenSSL(); | |
94 | return default_ECDH_method; | |
95 | } | |
e172d60d BM |
96 | |
97 | int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth) | |
40720ce3 MC |
98 | { |
99 | ECDH_DATA *ecdh; | |
e172d60d | 100 | |
40720ce3 | 101 | ecdh = ecdh_check(eckey); |
e172d60d | 102 | |
40720ce3 MC |
103 | if (ecdh == NULL) |
104 | return 0; | |
e172d60d | 105 | |
58ae65cd | 106 | #ifndef OPENSSL_NO_ENGINE |
40720ce3 MC |
107 | if (ecdh->engine) { |
108 | ENGINE_finish(ecdh->engine); | |
109 | ecdh->engine = NULL; | |
110 | } | |
58ae65cd | 111 | #endif |
40720ce3 | 112 | ecdh->meth = meth; |
e172d60d | 113 | #if 0 |
40720ce3 MC |
114 | if (meth->init) |
115 | meth->init(eckey); | |
e172d60d | 116 | #endif |
40720ce3 MC |
117 | return 1; |
118 | } | |
e172d60d | 119 | |
9dd84053 | 120 | static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine) |
40720ce3 MC |
121 | { |
122 | ECDH_DATA *ret; | |
e172d60d | 123 | |
40720ce3 MC |
124 | ret = (ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA)); |
125 | if (ret == NULL) { | |
126 | ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
127 | return (NULL); | |
128 | } | |
e172d60d | 129 | |
40720ce3 | 130 | ret->init = NULL; |
e172d60d | 131 | |
40720ce3 MC |
132 | ret->meth = ECDH_get_default_method(); |
133 | ret->engine = engine; | |
58ae65cd | 134 | #ifndef OPENSSL_NO_ENGINE |
40720ce3 MC |
135 | if (!ret->engine) |
136 | ret->engine = ENGINE_get_default_ECDH(); | |
137 | if (ret->engine) { | |
138 | ret->meth = ENGINE_get_ECDH(ret->engine); | |
139 | if (!ret->meth) { | |
140 | ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
141 | ENGINE_finish(ret->engine); | |
142 | OPENSSL_free(ret); | |
143 | return NULL; | |
144 | } | |
145 | } | |
58ae65cd | 146 | #endif |
e172d60d | 147 | |
40720ce3 MC |
148 | ret->flags = ret->meth->flags; |
149 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); | |
e172d60d | 150 | #if 0 |
40720ce3 MC |
151 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { |
152 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); | |
153 | OPENSSL_free(ret); | |
154 | ret = NULL; | |
155 | } | |
156 | #endif | |
157 | return (ret); | |
158 | } | |
e172d60d | 159 | |
aff2922f | 160 | static void *ecdh_data_new(void) |
40720ce3 MC |
161 | { |
162 | return (void *)ECDH_DATA_new_method(NULL); | |
163 | } | |
9dd84053 NL |
164 | |
165 | static void *ecdh_data_dup(void *data) | |
166 | { | |
40720ce3 | 167 | ECDH_DATA *r = (ECDH_DATA *)data; |
9dd84053 | 168 | |
40720ce3 MC |
169 | /* XXX: dummy operation */ |
170 | if (r == NULL) | |
171 | return NULL; | |
9dd84053 | 172 | |
40720ce3 | 173 | return (void *)ecdh_data_new(); |
9dd84053 NL |
174 | } |
175 | ||
176 | void ecdh_data_free(void *data) | |
40720ce3 MC |
177 | { |
178 | ECDH_DATA *r = (ECDH_DATA *)data; | |
9dd84053 | 179 | |
58ae65cd | 180 | #ifndef OPENSSL_NO_ENGINE |
40720ce3 MC |
181 | if (r->engine) |
182 | ENGINE_finish(r->engine); | |
58ae65cd | 183 | #endif |
e172d60d | 184 | |
40720ce3 | 185 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data); |
e172d60d | 186 | |
40720ce3 | 187 | OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA)); |
e172d60d | 188 | |
40720ce3 MC |
189 | OPENSSL_free(r); |
190 | } | |
e172d60d BM |
191 | |
192 | ECDH_DATA *ecdh_check(EC_KEY *key) | |
40720ce3 MC |
193 | { |
194 | ECDH_DATA *ecdh_data; | |
195 | ||
196 | void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup, | |
197 | ecdh_data_free, ecdh_data_free); | |
198 | if (data == NULL) { | |
199 | ecdh_data = (ECDH_DATA *)ecdh_data_new(); | |
200 | if (ecdh_data == NULL) | |
201 | return NULL; | |
202 | data = EC_KEY_insert_key_method_data(key, (void *)ecdh_data, | |
203 | ecdh_data_dup, ecdh_data_free, | |
204 | ecdh_data_free); | |
205 | if (data != NULL) { | |
206 | /* | |
207 | * Another thread raced us to install the key_method data and | |
208 | * won. | |
209 | */ | |
210 | ecdh_data_free(ecdh_data); | |
211 | ecdh_data = (ECDH_DATA *)data; | |
212 | } | |
213 | } else | |
214 | ecdh_data = (ECDH_DATA *)data; | |
215 | ||
216 | return ecdh_data; | |
217 | } | |
e172d60d | 218 | |
e172d60d | 219 | int ECDH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
40720ce3 MC |
220 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
221 | { | |
222 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDH, argl, argp, | |
223 | new_func, dup_func, free_func); | |
224 | } | |
e172d60d BM |
225 | |
226 | int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg) | |
40720ce3 MC |
227 | { |
228 | ECDH_DATA *ecdh; | |
229 | ecdh = ecdh_check(d); | |
230 | if (ecdh == NULL) | |
231 | return 0; | |
232 | return (CRYPTO_set_ex_data(&ecdh->ex_data, idx, arg)); | |
233 | } | |
e172d60d BM |
234 | |
235 | void *ECDH_get_ex_data(EC_KEY *d, int idx) | |
40720ce3 MC |
236 | { |
237 | ECDH_DATA *ecdh; | |
238 | ecdh = ecdh_check(d); | |
239 | if (ecdh == NULL) | |
240 | return NULL; | |
241 | return (CRYPTO_get_ex_data(&ecdh->ex_data, idx)); | |
242 | } |