release/src/router/openssl/crypto/ecdsa/ecs_lib.c

   1 /* crypto/ecdsa/ecs_lib.c */
   2 /* ====================================================================
   3  * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
   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  */
  55
  56 #include <string.h>
  57 #include "ecs_locl.h"
  58 #ifndef OPENSSL_NO_ENGINE
  59 # include <openssl/engine.h>
  60 #endif
  61 #include <openssl/err.h>
  62 #include <openssl/bn.h>
  63 #ifdef OPENSSL_FIPS
  64 # include <openssl/fips.h>
  65 #endif
  66
  67 const char ECDSA_version[] = "ECDSA" OPENSSL_VERSION_PTEXT;
  68
  69 static const ECDSA_METHOD *default_ECDSA_method = NULL;
  70
  71 static void *ecdsa_data_new(void);
  72 static void *ecdsa_data_dup(void *);
  73 static void ecdsa_data_free(void *);
  74
  75 void ECDSA_set_default_method(const ECDSA_METHOD *meth)
  76 {
  77     default_ECDSA_method = meth;
  78 }
  79
  80 const ECDSA_METHOD *ECDSA_get_default_method(void)
  81 {
  82     if (!default_ECDSA_method) {
  83 #ifdef OPENSSL_FIPS
  84         if (FIPS_mode())
  85             return FIPS_ecdsa_openssl();
  86         else
  87             return ECDSA_OpenSSL();
  88 #else
  89         default_ECDSA_method = ECDSA_OpenSSL();
  90 #endif
  91     }
  92     return default_ECDSA_method;
  93 }
  94
  95 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
  96 {
  97     ECDSA_DATA *ecdsa;
  98
  99     ecdsa = ecdsa_check(eckey);
 100
 101     if (ecdsa == NULL)
 102         return 0;
 103
 104 #ifndef OPENSSL_NO_ENGINE
 105     if (ecdsa->engine) {
 106         ENGINE_finish(ecdsa->engine);
 107         ecdsa->engine = NULL;
 108     }
 109 #endif
 110     ecdsa->meth = meth;
 111
 112     return 1;
 113 }
 114
 115 static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
 116 {
 117     ECDSA_DATA *ret;
 118
 119     ret = (ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
 120     if (ret == NULL) {
 121         ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
 122         return (NULL);
 123     }
 124
 125     ret->init = NULL;
 126
 127     ret->meth = ECDSA_get_default_method();
 128     ret->engine = engine;
 129 #ifndef OPENSSL_NO_ENGINE
 130     if (!ret->engine)
 131         ret->engine = ENGINE_get_default_ECDSA();
 132     if (ret->engine) {
 133         ret->meth = ENGINE_get_ECDSA(ret->engine);
 134         if (!ret->meth) {
 135             ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
 136             ENGINE_finish(ret->engine);
 137             OPENSSL_free(ret);
 138             return NULL;
 139         }
 140     }
 141 #endif
 142
 143     ret->flags = ret->meth->flags;
 144     CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
 145 #if 0
 146     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
 147         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
 148         OPENSSL_free(ret);
 149         ret = NULL;
 150     }
 151 #endif
 152     return (ret);
 153 }
 154
 155 static void *ecdsa_data_new(void)
 156 {
 157     return (void *)ECDSA_DATA_new_method(NULL);
 158 }
 159
 160 static void *ecdsa_data_dup(void *data)
 161 {
 162     ECDSA_DATA *r = (ECDSA_DATA *)data;
 163
 164     /* XXX: dummy operation */
 165     if (r == NULL)
 166         return NULL;
 167
 168     return ecdsa_data_new();
 169 }
 170
 171 static void ecdsa_data_free(void *data)
 172 {
 173     ECDSA_DATA *r = (ECDSA_DATA *)data;
 174
 175 #ifndef OPENSSL_NO_ENGINE
 176     if (r->engine)
 177         ENGINE_finish(r->engine);
 178 #endif
 179     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
 180
 181     OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
 182
 183     OPENSSL_free(r);
 184 }
 185
 186 ECDSA_DATA *ecdsa_check(EC_KEY *key)
 187 {
 188     ECDSA_DATA *ecdsa_data;
 189
 190     void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
 191                                             ecdsa_data_free, ecdsa_data_free);
 192     if (data == NULL) {
 193         ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
 194         if (ecdsa_data == NULL)
 195             return NULL;
 196         data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
 197                                              ecdsa_data_dup, ecdsa_data_free,
 198                                              ecdsa_data_free);
 199         if (data != NULL) {
 200             /*
 201              * Another thread raced us to install the key_method data and
 202              * won.
 203              */
 204             ecdsa_data_free(ecdsa_data);
 205             ecdsa_data = (ECDSA_DATA *)data;
 206         }
 207     } else
 208         ecdsa_data = (ECDSA_DATA *)data;
 209 #ifdef OPENSSL_FIPS
 210     if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD)
 211         && !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW)) {
 212         ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD);
 213         return NULL;
 214     }
 215 #endif
 216
 217     return ecdsa_data;
 218 }
 219
 220 int ECDSA_size(const EC_KEY *r)
 221 {
 222     int ret, i;
 223     ASN1_INTEGER bs;
 224     BIGNUM *order = NULL;
 225     unsigned char buf[4];
 226     const EC_GROUP *group;
 227
 228     if (r == NULL)
 229         return 0;
 230     group = EC_KEY_get0_group(r);
 231     if (group == NULL)
 232         return 0;
 233
 234     if ((order = BN_new()) == NULL)
 235         return 0;
 236     if (!EC_GROUP_get_order(group, order, NULL)) {
 237         BN_clear_free(order);
 238         return 0;
 239     }
 240     i = BN_num_bits(order);
 241     bs.length = (i + 7) / 8;
 242     bs.data = buf;
 243     bs.type = V_ASN1_INTEGER;
 244     /* If the top bit is set the asn1 encoding is 1 larger. */
 245     buf[0] = 0xff;
 246
 247     i = i2d_ASN1_INTEGER(&bs, NULL);
 248     i += i;                     /* r and s */
 249     ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
 250     BN_clear_free(order);
 251     return (ret);
 252 }
 253
 254 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 255                            CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 256 {
 257     return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
 258                                    new_func, dup_func, free_func);
 259 }
 260
 261 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
 262 {
 263     ECDSA_DATA *ecdsa;
 264     ecdsa = ecdsa_check(d);
 265     if (ecdsa == NULL)
 266         return 0;
 267     return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg));
 268 }
 269
 270 void *ECDSA_get_ex_data(EC_KEY *d, int idx)
 271 {
 272     ECDSA_DATA *ecdsa;
 273     ecdsa = ecdsa_check(d);
 274     if (ecdsa == NULL)
 275         return NULL;
 276     return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx));
 277 }
 278
 279 ECDSA_METHOD *ECDSA_METHOD_new(const ECDSA_METHOD *ecdsa_meth)
 280 {
 281     ECDSA_METHOD *ret;
 282
 283     ret = OPENSSL_malloc(sizeof(ECDSA_METHOD));
 284     if (ret == NULL) {
 285         ECDSAerr(ECDSA_F_ECDSA_METHOD_NEW, ERR_R_MALLOC_FAILURE);
 286         return NULL;
 287     }
 288
 289     if (ecdsa_meth)
 290         *ret = *ecdsa_meth;
 291     else {
 292         ret->ecdsa_sign_setup = 0;
 293         ret->ecdsa_do_sign = 0;
 294         ret->ecdsa_do_verify = 0;
 295         ret->name = NULL;
 296         ret->flags = 0;
 297     }
 298     ret->flags |= ECDSA_METHOD_FLAG_ALLOCATED;
 299     return ret;
 300 }
 301
 302 void ECDSA_METHOD_set_sign(ECDSA_METHOD *ecdsa_method,
 303                            ECDSA_SIG *(*ecdsa_do_sign) (const unsigned char
 304                                                         *dgst, int dgst_len,
 305                                                         const BIGNUM *inv,
 306                                                         const BIGNUM *rp,
 307                                                         EC_KEY *eckey))
 308 {
 309     ecdsa_method->ecdsa_do_sign = ecdsa_do_sign;
 310 }
 311
 312 void ECDSA_METHOD_set_sign_setup(ECDSA_METHOD *ecdsa_method,
 313                                  int (*ecdsa_sign_setup) (EC_KEY *eckey,
 314                                                           BN_CTX *ctx,
 315                                                           BIGNUM **kinv,
 316                                                           BIGNUM **r))
 317 {
 318     ecdsa_method->ecdsa_sign_setup = ecdsa_sign_setup;
 319 }
 320
 321 void ECDSA_METHOD_set_verify(ECDSA_METHOD *ecdsa_method,
 322                              int (*ecdsa_do_verify) (const unsigned char
 323                                                      *dgst, int dgst_len,
 324                                                      const ECDSA_SIG *sig,
 325                                                      EC_KEY *eckey))
 326 {
 327     ecdsa_method->ecdsa_do_verify = ecdsa_do_verify;
 328 }
 329
 330 void ECDSA_METHOD_set_flags(ECDSA_METHOD *ecdsa_method, int flags)
 331 {
 332     ecdsa_method->flags = flags | ECDSA_METHOD_FLAG_ALLOCATED;
 333 }
 334
 335 void ECDSA_METHOD_set_name(ECDSA_METHOD *ecdsa_method, char *name)
 336 {
 337     ecdsa_method->name = name;
 338 }
 339
 340 void ECDSA_METHOD_free(ECDSA_METHOD *ecdsa_method)
 341 {
 342     if (ecdsa_method->flags & ECDSA_METHOD_FLAG_ALLOCATED)
 343         OPENSSL_free(ecdsa_method);
 344 }
 345
 346 void ECDSA_METHOD_set_app_data(ECDSA_METHOD *ecdsa_method, void *app)
 347 {
 348     ecdsa_method->app_data = app;
 349 }
 350
 351 void *ECDSA_METHOD_get_app_data(ECDSA_METHOD *ecdsa_method)
 352 {
 353     return ecdsa_method->app_data;
 354 }