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                 {
  84 #ifdef OPENSSL_FIPS
  85                 if (FIPS_mode())
  86                         return FIPS_ecdsa_openssl();
  87                 else
  88                         return ECDSA_OpenSSL();
  89 #else
  90                 default_ECDSA_method = ECDSA_OpenSSL();
  91 #endif
  92                 }
  93         return default_ECDSA_method;
  94 }
  95
  96 int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth)
  97 {
  98         ECDSA_DATA *ecdsa;
  99
 100         ecdsa = ecdsa_check(eckey);
 101
 102         if (ecdsa == NULL)
 103                 return 0;
 104
 105 #ifndef OPENSSL_NO_ENGINE
 106         if (ecdsa->engine)
 107         {
 108                 ENGINE_finish(ecdsa->engine);
 109                 ecdsa->engine = NULL;
 110         }
 111 #endif
 112         ecdsa->meth = meth;
 113
 114         return 1;
 115 }
 116
 117 static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine)
 118 {
 119         ECDSA_DATA *ret;
 120
 121         ret=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA));
 122         if (ret == NULL)
 123         {
 124                 ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
 125                 return(NULL);
 126         }
 127
 128         ret->init = NULL;
 129
 130         ret->meth = ECDSA_get_default_method();
 131         ret->engine = engine;
 132 #ifndef OPENSSL_NO_ENGINE
 133         if (!ret->engine)
 134                 ret->engine = ENGINE_get_default_ECDSA();
 135         if (ret->engine)
 136         {
 137                 ret->meth = ENGINE_get_ECDSA(ret->engine);
 138                 if (!ret->meth)
 139                 {
 140                         ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB);
 141                         ENGINE_finish(ret->engine);
 142                         OPENSSL_free(ret);
 143                         return NULL;
 144                 }
 145         }
 146 #endif
 147
 148         ret->flags = ret->meth->flags;
 149         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
 150 #if 0
 151         if ((ret->meth->init != NULL) && !ret->meth->init(ret))
 152         {
 153                 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data);
 154                 OPENSSL_free(ret);
 155                 ret=NULL;
 156         }
 157 #endif
 158         return(ret);
 159 }
 160
 161 static void *ecdsa_data_new(void)
 162 {
 163         return (void *)ECDSA_DATA_new_method(NULL);
 164 }
 165
 166 static void *ecdsa_data_dup(void *data)
 167 {
 168         ECDSA_DATA *r = (ECDSA_DATA *)data;
 169
 170         /* XXX: dummy operation */
 171         if (r == NULL)
 172                 return NULL;
 173
 174         return ecdsa_data_new();
 175 }
 176
 177 static void ecdsa_data_free(void *data)
 178 {
 179         ECDSA_DATA *r = (ECDSA_DATA *)data;
 180
 181 #ifndef OPENSSL_NO_ENGINE
 182         if (r->engine)
 183                 ENGINE_finish(r->engine);
 184 #endif
 185         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data);
 186
 187         OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA));
 188
 189         OPENSSL_free(r);
 190 }
 191
 192 ECDSA_DATA *ecdsa_check(EC_KEY *key)
 193 {
 194         ECDSA_DATA *ecdsa_data;
 195
 196         void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup,
 197                                         ecdsa_data_free, ecdsa_data_free);
 198         if (data == NULL)
 199         {
 200                 ecdsa_data = (ECDSA_DATA *)ecdsa_data_new();
 201                 if (ecdsa_data == NULL)
 202                         return NULL;
 203                 data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data,
 204                            ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free);
 205                 if (data != NULL)
 206                         {
 207                         /* Another thread raced us to install the key_method
 208                          * data and won. */
 209                         ecdsa_data_free(ecdsa_data);
 210                         ecdsa_data = (ECDSA_DATA *)data;
 211                         }
 212         }
 213         else
 214                 ecdsa_data = (ECDSA_DATA *)data;
 215 #ifdef OPENSSL_FIPS
 216         if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD)
 217                         && !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW))
 218                 {
 219                 ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD);
 220                 return NULL;
 221                 }
 222 #endif
 223
 224         return ecdsa_data;
 225 }
 226
 227 int ECDSA_size(const EC_KEY *r)
 228 {
 229         int ret,i;
 230         ASN1_INTEGER bs;
 231         BIGNUM  *order=NULL;
 232         unsigned char buf[4];
 233         const EC_GROUP *group;
 234
 235         if (r == NULL)
 236                 return 0;
 237         group = EC_KEY_get0_group(r);
 238         if (group == NULL)
 239                 return 0;
 240
 241         if ((order = BN_new()) == NULL) return 0;
 242         if (!EC_GROUP_get_order(group,order,NULL))
 243         {
 244                 BN_clear_free(order);
 245                 return 0;
 246         }
 247         i=BN_num_bits(order);
 248         bs.length=(i+7)/8;
 249         bs.data=buf;
 250         bs.type=V_ASN1_INTEGER;
 251         /* If the top bit is set the asn1 encoding is 1 larger. */
 252         buf[0]=0xff;
 253
 254         i=i2d_ASN1_INTEGER(&bs,NULL);
 255         i+=i; /* r and s */
 256         ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
 257         BN_clear_free(order);
 258         return(ret);
 259 }
 260
 261
 262 int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 263              CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 264 {
 265         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp,
 266                                 new_func, dup_func, free_func);
 267 }
 268
 269 int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg)
 270 {
 271         ECDSA_DATA *ecdsa;
 272         ecdsa = ecdsa_check(d);
 273         if (ecdsa == NULL)
 274                 return 0;
 275         return(CRYPTO_set_ex_data(&ecdsa->ex_data,idx,arg));
 276 }
 277
 278 void *ECDSA_get_ex_data(EC_KEY *d, int idx)
 279 {
 280         ECDSA_DATA *ecdsa;
 281         ecdsa = ecdsa_check(d);
 282         if (ecdsa == NULL)
 283                 return NULL;
 284         return(CRYPTO_get_ex_data(&ecdsa->ex_data,idx));
 285 }