]>
Commit | Line | Data |
---|---|---|
4d94ae00 BM |
1 | /* crypto/ecdsa/ecs_lib.c */ |
2 | /* ==================================================================== | |
9dd84053 | 3 | * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. |
4d94ae00 BM |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in | |
14 | * the documentation and/or other materials provided with the | |
15 | * distribution. | |
16 | * | |
17 | * 3. All advertising materials mentioning features or use of this | |
18 | * software must display the following acknowledgment: | |
19 | * "This product includes software developed by the OpenSSL Project | |
20 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
21 | * | |
22 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
23 | * endorse or promote products derived from this software without | |
24 | * prior written permission. For written permission, please contact | |
25 | * openssl-core@OpenSSL.org. | |
26 | * | |
27 | * 5. Products derived from this software may not be called "OpenSSL" | |
28 | * nor may "OpenSSL" appear in their names without prior written | |
29 | * permission of the OpenSSL Project. | |
30 | * | |
31 | * 6. Redistributions of any form whatsoever must retain the following | |
32 | * acknowledgment: | |
33 | * "This product includes software developed by the OpenSSL Project | |
34 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
35 | * | |
36 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
37 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
39 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
40 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
41 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
43 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
45 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
46 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
47 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 | * ==================================================================== | |
49 | * | |
50 | * This product includes cryptographic software written by Eric Young | |
51 | * (eay@cryptsoft.com). This product includes software written by Tim | |
52 | * Hudson (tjh@cryptsoft.com). | |
53 | * | |
54 | */ | |
4d94ae00 | 55 | |
5454829a | 56 | #include <string.h> |
6a50d0a4 | 57 | #include "ecs_locl.h" |
58ae65cd | 58 | #ifndef OPENSSL_NO_ENGINE |
4d94ae00 | 59 | #include <openssl/engine.h> |
58ae65cd | 60 | #endif |
60a938c6 | 61 | #include <openssl/err.h> |
0f814687 | 62 | #include <openssl/bn.h> |
4d94ae00 | 63 | |
560b79cb | 64 | const char ECDSA_version[]="ECDSA" OPENSSL_VERSION_PTEXT; |
4d94ae00 BM |
65 | |
66 | static const ECDSA_METHOD *default_ECDSA_method = NULL; | |
67 | ||
bbbd6710 | 68 | static void *ecdsa_data_new(void); |
9dd84053 NL |
69 | static void *ecdsa_data_dup(void *); |
70 | static void ecdsa_data_free(void *); | |
71 | ||
4d94ae00 BM |
72 | void ECDSA_set_default_method(const ECDSA_METHOD *meth) |
73 | { | |
74 | default_ECDSA_method = meth; | |
75 | } | |
76 | ||
77 | const ECDSA_METHOD *ECDSA_get_default_method(void) | |
78 | { | |
79 | if(!default_ECDSA_method) | |
80 | default_ECDSA_method = ECDSA_OpenSSL(); | |
81 | return default_ECDSA_method; | |
82 | } | |
83 | ||
14a7cfb3 | 84 | int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth) |
4d94ae00 | 85 | { |
14a7cfb3 BM |
86 | ECDSA_DATA *ecdsa; |
87 | ||
88 | ecdsa = ecdsa_check(eckey); | |
89 | ||
90 | if (ecdsa == NULL) | |
91 | return 0; | |
92 | ||
58ae65cd | 93 | #ifndef OPENSSL_NO_ENGINE |
4d94ae00 BM |
94 | if (ecdsa->engine) |
95 | { | |
96 | ENGINE_finish(ecdsa->engine); | |
97 | ecdsa->engine = NULL; | |
98 | } | |
58ae65cd | 99 | #endif |
4d94ae00 | 100 | ecdsa->meth = meth; |
4d94ae00 | 101 | |
9dd84053 | 102 | return 1; |
14a7cfb3 BM |
103 | } |
104 | ||
9dd84053 | 105 | static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine) |
4d94ae00 | 106 | { |
14a7cfb3 | 107 | ECDSA_DATA *ret; |
4d94ae00 | 108 | |
14a7cfb3 | 109 | ret=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA)); |
4d94ae00 BM |
110 | if (ret == NULL) |
111 | { | |
aa4ce731 | 112 | ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); |
4d94ae00 BM |
113 | return(NULL); |
114 | } | |
115 | ||
14a7cfb3 | 116 | ret->init = NULL; |
14a7cfb3 | 117 | |
4d94ae00 BM |
118 | ret->meth = ECDSA_get_default_method(); |
119 | ret->engine = engine; | |
58ae65cd | 120 | #ifndef OPENSSL_NO_ENGINE |
4d94ae00 BM |
121 | if (!ret->engine) |
122 | ret->engine = ENGINE_get_default_ECDSA(); | |
123 | if (ret->engine) | |
124 | { | |
125 | ret->meth = ENGINE_get_ECDSA(ret->engine); | |
126 | if (!ret->meth) | |
127 | { | |
aa4ce731 | 128 | ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); |
4d94ae00 BM |
129 | ENGINE_finish(ret->engine); |
130 | OPENSSL_free(ret); | |
131 | return NULL; | |
132 | } | |
133 | } | |
58ae65cd | 134 | #endif |
4d94ae00 | 135 | |
4d94ae00 BM |
136 | ret->flags = ret->meth->flags; |
137 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); | |
14a7cfb3 | 138 | #if 0 |
4d94ae00 BM |
139 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) |
140 | { | |
141 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); | |
142 | OPENSSL_free(ret); | |
143 | ret=NULL; | |
144 | } | |
14a7cfb3 | 145 | #endif |
4d94ae00 BM |
146 | return(ret); |
147 | } | |
148 | ||
bbbd6710 | 149 | static void *ecdsa_data_new(void) |
4d94ae00 | 150 | { |
9dd84053 NL |
151 | return (void *)ECDSA_DATA_new_method(NULL); |
152 | } | |
153 | ||
154 | static void *ecdsa_data_dup(void *data) | |
155 | { | |
156 | ECDSA_DATA *r = (ECDSA_DATA *)data; | |
157 | ||
158 | /* XXX: dummy operation */ | |
159 | if (r == NULL) | |
160 | return NULL; | |
161 | ||
162 | return ecdsa_data_new(); | |
163 | } | |
164 | ||
165 | static void ecdsa_data_free(void *data) | |
166 | { | |
167 | ECDSA_DATA *r = (ECDSA_DATA *)data; | |
4d94ae00 | 168 | |
58ae65cd | 169 | #ifndef OPENSSL_NO_ENGINE |
4d94ae00 BM |
170 | if (r->engine) |
171 | ENGINE_finish(r->engine); | |
58ae65cd | 172 | #endif |
4d94ae00 BM |
173 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data); |
174 | ||
4579924b | 175 | OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA)); |
14a7cfb3 | 176 | |
4d94ae00 BM |
177 | OPENSSL_free(r); |
178 | } | |
179 | ||
14a7cfb3 BM |
180 | ECDSA_DATA *ecdsa_check(EC_KEY *key) |
181 | { | |
9dd84053 NL |
182 | ECDSA_DATA *ecdsa_data; |
183 | ||
184 | void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup, | |
185 | ecdsa_data_free, ecdsa_data_free); | |
186 | if (data == NULL) | |
14a7cfb3 | 187 | { |
9dd84053 NL |
188 | ecdsa_data = (ECDSA_DATA *)ecdsa_data_new(); |
189 | if (ecdsa_data == NULL) | |
190 | return NULL; | |
f11d0c79 BM |
191 | data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data, |
192 | ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free); | |
193 | if (data != NULL) | |
194 | { | |
195 | /* Another thread raced us to install the key_method | |
196 | * data and won. */ | |
197 | ecdsa_data_free(ecdsa_data); | |
198 | ecdsa_data = (ECDSA_DATA *)data; | |
199 | } | |
14a7cfb3 BM |
200 | } |
201 | else | |
9dd84053 NL |
202 | ecdsa_data = (ECDSA_DATA *)data; |
203 | ||
14a7cfb3 | 204 | |
9dd84053 | 205 | return ecdsa_data; |
14a7cfb3 BM |
206 | } |
207 | ||
208 | int ECDSA_size(const EC_KEY *r) | |
4d94ae00 BM |
209 | { |
210 | int ret,i; | |
211 | ASN1_INTEGER bs; | |
212 | BIGNUM *order=NULL; | |
213 | unsigned char buf[4]; | |
8c5a2bd6 | 214 | const EC_GROUP *group; |
4d94ae00 | 215 | |
8c5a2bd6 NL |
216 | if (r == NULL) |
217 | return 0; | |
218 | group = EC_KEY_get0_group(r); | |
219 | if (group == NULL) | |
4d94ae00 | 220 | return 0; |
8c5a2bd6 | 221 | |
4d94ae00 | 222 | if ((order = BN_new()) == NULL) return 0; |
9dd84053 | 223 | if (!EC_GROUP_get_order(group,order,NULL)) |
4d94ae00 BM |
224 | { |
225 | BN_clear_free(order); | |
226 | return 0; | |
227 | } | |
228 | i=BN_num_bits(order); | |
229 | bs.length=(i+7)/8; | |
230 | bs.data=buf; | |
231 | bs.type=V_ASN1_INTEGER; | |
232 | /* If the top bit is set the asn1 encoding is 1 larger. */ | |
233 | buf[0]=0xff; | |
234 | ||
235 | i=i2d_ASN1_INTEGER(&bs,NULL); | |
236 | i+=i; /* r and s */ | |
237 | ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); | |
238 | BN_clear_free(order); | |
239 | return(ret); | |
240 | } | |
241 | ||
14a7cfb3 | 242 | |
4d94ae00 BM |
243 | int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
244 | CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
245 | { | |
246 | return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp, | |
247 | new_func, dup_func, free_func); | |
248 | } | |
249 | ||
14a7cfb3 | 250 | int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg) |
4d94ae00 | 251 | { |
14a7cfb3 BM |
252 | ECDSA_DATA *ecdsa; |
253 | ecdsa = ecdsa_check(d); | |
254 | if (ecdsa == NULL) | |
255 | return 0; | |
256 | return(CRYPTO_set_ex_data(&ecdsa->ex_data,idx,arg)); | |
0bee0e62 BM |
257 | } |
258 | ||
14a7cfb3 | 259 | void *ECDSA_get_ex_data(EC_KEY *d, int idx) |
0bee0e62 | 260 | { |
14a7cfb3 BM |
261 | ECDSA_DATA *ecdsa; |
262 | ecdsa = ecdsa_check(d); | |
263 | if (ecdsa == NULL) | |
264 | return NULL; | |
265 | return(CRYPTO_get_ex_data(&ecdsa->ex_data,idx)); | |
0bee0e62 | 266 | } |