release/src/router/openssl/crypto/rsa/rsa_lib.c

   1 /* crypto/rsa/rsa_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <openssl/crypto.h>
  61 #include "cryptlib.h"
  62 #include <openssl/lhash.h>
  63 #include <openssl/bn.h>
  64 #include <openssl/rsa.h>
  65 #include <openssl/rand.h>
  66 #ifndef OPENSSL_NO_ENGINE
  67 #include <openssl/engine.h>
  68 #endif
  69
  70 #ifdef OPENSSL_FIPS
  71 #include <openssl/fips.h>
  72 #endif
  73
  74 const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT;
  75
  76 static const RSA_METHOD *default_RSA_meth=NULL;
  77
  78 RSA *RSA_new(void)
  79         {
  80         RSA *r=RSA_new_method(NULL);
  81
  82         return r;
  83         }
  84
  85 void RSA_set_default_method(const RSA_METHOD *meth)
  86         {
  87         default_RSA_meth = meth;
  88         }
  89
  90 const RSA_METHOD *RSA_get_default_method(void)
  91         {
  92         if (default_RSA_meth == NULL)
  93                 {
  94 #ifdef OPENSSL_FIPS
  95                 if (FIPS_mode())
  96                         return FIPS_rsa_pkcs1_ssleay();
  97                 else
  98                         return RSA_PKCS1_SSLeay();
  99 #else
 100 #ifdef RSA_NULL
 101                 default_RSA_meth=RSA_null_method();
 102 #else
 103                 default_RSA_meth=RSA_PKCS1_SSLeay();
 104 #endif
 105 #endif
 106                 }
 107
 108         return default_RSA_meth;
 109         }
 110
 111 const RSA_METHOD *RSA_get_method(const RSA *rsa)
 112         {
 113         return rsa->meth;
 114         }
 115
 116 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
 117         {
 118         /* NB: The caller is specifically setting a method, so it's not up to us
 119          * to deal with which ENGINE it comes from. */
 120         const RSA_METHOD *mtmp;
 121         mtmp = rsa->meth;
 122         if (mtmp->finish) mtmp->finish(rsa);
 123 #ifndef OPENSSL_NO_ENGINE
 124         if (rsa->engine)
 125                 {
 126                 ENGINE_finish(rsa->engine);
 127                 rsa->engine = NULL;
 128                 }
 129 #endif
 130         rsa->meth = meth;
 131         if (meth->init) meth->init(rsa);
 132         return 1;
 133         }
 134
 135 RSA *RSA_new_method(ENGINE *engine)
 136         {
 137         RSA *ret;
 138
 139         ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
 140         if (ret == NULL)
 141                 {
 142                 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
 143                 return NULL;
 144                 }
 145
 146         ret->meth = RSA_get_default_method();
 147 #ifndef OPENSSL_NO_ENGINE
 148         if (engine)
 149                 {
 150                 if (!ENGINE_init(engine))
 151                         {
 152                         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
 153                         OPENSSL_free(ret);
 154                         return NULL;
 155                         }
 156                 ret->engine = engine;
 157                 }
 158         else
 159                 ret->engine = ENGINE_get_default_RSA();
 160         if(ret->engine)
 161                 {
 162                 ret->meth = ENGINE_get_RSA(ret->engine);
 163                 if(!ret->meth)
 164                         {
 165                         RSAerr(RSA_F_RSA_NEW_METHOD,
 166                                 ERR_R_ENGINE_LIB);
 167                         ENGINE_finish(ret->engine);
 168                         OPENSSL_free(ret);
 169                         return NULL;
 170                         }
 171                 }
 172 #endif
 173
 174         ret->pad=0;
 175         ret->version=0;
 176         ret->n=NULL;
 177         ret->e=NULL;
 178         ret->d=NULL;
 179         ret->p=NULL;
 180         ret->q=NULL;
 181         ret->dmp1=NULL;
 182         ret->dmq1=NULL;
 183         ret->iqmp=NULL;
 184         ret->references=1;
 185         ret->_method_mod_n=NULL;
 186         ret->_method_mod_p=NULL;
 187         ret->_method_mod_q=NULL;
 188         ret->blinding=NULL;
 189         ret->mt_blinding=NULL;
 190         ret->bignum_data=NULL;
 191         ret->flags=ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
 192         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data))
 193                 {
 194 #ifndef OPENSSL_NO_ENGINE
 195         if (ret->engine)
 196                 ENGINE_finish(ret->engine);
 197 #endif
 198                 OPENSSL_free(ret);
 199                 return(NULL);
 200                 }
 201
 202         if ((ret->meth->init != NULL) && !ret->meth->init(ret))
 203                 {
 204 #ifndef OPENSSL_NO_ENGINE
 205                 if (ret->engine)
 206                         ENGINE_finish(ret->engine);
 207 #endif
 208                 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
 209                 OPENSSL_free(ret);
 210                 ret=NULL;
 211                 }
 212         return(ret);
 213         }
 214
 215 void RSA_free(RSA *r)
 216         {
 217         int i;
 218
 219         if (r == NULL) return;
 220
 221         i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
 222 #ifdef REF_PRINT
 223         REF_PRINT("RSA",r);
 224 #endif
 225         if (i > 0) return;
 226 #ifdef REF_CHECK
 227         if (i < 0)
 228                 {
 229                 fprintf(stderr,"RSA_free, bad reference count\n");
 230                 abort();
 231                 }
 232 #endif
 233
 234         if (r->meth->finish)
 235                 r->meth->finish(r);
 236 #ifndef OPENSSL_NO_ENGINE
 237         if (r->engine)
 238                 ENGINE_finish(r->engine);
 239 #endif
 240
 241         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 242
 243         if (r->n != NULL) BN_clear_free(r->n);
 244         if (r->e != NULL) BN_clear_free(r->e);
 245         if (r->d != NULL) BN_clear_free(r->d);
 246         if (r->p != NULL) BN_clear_free(r->p);
 247         if (r->q != NULL) BN_clear_free(r->q);
 248         if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
 249         if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
 250         if (r->iqmp != NULL) BN_clear_free(r->iqmp);
 251         if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
 252         if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding);
 253         if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
 254         OPENSSL_free(r);
 255         }
 256
 257 int RSA_up_ref(RSA *r)
 258         {
 259         int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
 260 #ifdef REF_PRINT
 261         REF_PRINT("RSA",r);
 262 #endif
 263 #ifdef REF_CHECK
 264         if (i < 2)
 265                 {
 266                 fprintf(stderr, "RSA_up_ref, bad reference count\n");
 267                 abort();
 268                 }
 269 #endif
 270         return ((i > 1) ? 1 : 0);
 271         }
 272
 273 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 274              CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 275         {
 276         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
 277                                 new_func, dup_func, free_func);
 278         }
 279
 280 int RSA_set_ex_data(RSA *r, int idx, void *arg)
 281         {
 282         return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
 283         }
 284
 285 void *RSA_get_ex_data(const RSA *r, int idx)
 286         {
 287         return(CRYPTO_get_ex_data(&r->ex_data,idx));
 288         }
 289
 290 int RSA_memory_lock(RSA *r)
 291         {
 292         int i,j,k,off;
 293         char *p;
 294         BIGNUM *bn,**t[6],*b;
 295         BN_ULONG *ul;
 296
 297         if (r->d == NULL) return(1);
 298         t[0]= &r->d;
 299         t[1]= &r->p;
 300         t[2]= &r->q;
 301         t[3]= &r->dmp1;
 302         t[4]= &r->dmq1;
 303         t[5]= &r->iqmp;
 304         k=sizeof(BIGNUM)*6;
 305         off=k/sizeof(BN_ULONG)+1;
 306         j=1;
 307         for (i=0; i<6; i++)
 308                 j+= (*t[i])->top;
 309         if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
 310                 {
 311                 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
 312                 return(0);
 313                 }
 314         bn=(BIGNUM *)p;
 315         ul=(BN_ULONG *)&(p[off]);
 316         for (i=0; i<6; i++)
 317                 {
 318                 b= *(t[i]);
 319                 *(t[i])= &(bn[i]);
 320                 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
 321                 bn[i].flags=BN_FLG_STATIC_DATA;
 322                 bn[i].d=ul;
 323                 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
 324                 ul+=b->top;
 325                 BN_clear_free(b);
 326                 }
 327
 328         /* I should fix this so it can still be done */
 329         r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
 330
 331         r->bignum_data=p;
 332         return(1);
 333         }