release/src/router/openssl/crypto/bn/exptest.c

   1 /* crypto/bn/exptest.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 <stdlib.h>
  61 #include <string.h>
  62
  63 #include "../e_os.h"
  64
  65 #include <openssl/bio.h>
  66 #include <openssl/bn.h>
  67 #include <openssl/rand.h>
  68 #include <openssl/err.h>
  69
  70 #define NUM_BITS        (BN_BITS*2)
  71
  72 static const char rnd_seed[] = "string to make the random number generator think it has entropy";
  73
  74 /* test_exp_mod_zero tests that x**0 mod 1 == 0. It returns zero on success. */
  75 static int test_exp_mod_zero() {
  76         BIGNUM a, p, m;
  77         BIGNUM r;
  78         BN_CTX *ctx = BN_CTX_new();
  79         int ret = 1;
  80
  81         BN_init(&m);
  82         BN_one(&m);
  83
  84         BN_init(&a);
  85         BN_one(&a);
  86
  87         BN_init(&p);
  88         BN_zero(&p);
  89
  90         BN_init(&r);
  91         BN_mod_exp(&r, &a, &p, &m, ctx);
  92         BN_CTX_free(ctx);
  93
  94         if (BN_is_zero(&r))
  95                 ret = 0;
  96         else
  97                 {
  98                 printf("1**0 mod 1 = ");
  99                 BN_print_fp(stdout, &r);
 100                 printf(", should be 0\n");
 101                 }
 102
 103         BN_free(&r);
 104         BN_free(&a);
 105         BN_free(&p);
 106         BN_free(&m);
 107
 108         return ret;
 109 }
 110
 111 int main(int argc, char *argv[])
 112         {
 113         BN_CTX *ctx;
 114         BIO *out=NULL;
 115         int i,ret;
 116         unsigned char c;
 117         BIGNUM *r_mont,*r_mont_const,*r_recp,*r_simple,*a,*b,*m;
 118
 119         RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't
 120                                                * even check its return value
 121                                                * (which we should) */
 122
 123         ERR_load_BN_strings();
 124
 125         ctx=BN_CTX_new();
 126         if (ctx == NULL) EXIT(1);
 127         r_mont=BN_new();
 128         r_mont_const=BN_new();
 129         r_recp=BN_new();
 130         r_simple=BN_new();
 131         a=BN_new();
 132         b=BN_new();
 133         m=BN_new();
 134         if (    (r_mont == NULL) || (r_recp == NULL) ||
 135                 (a == NULL) || (b == NULL))
 136                 goto err;
 137
 138         out=BIO_new(BIO_s_file());
 139
 140         if (out == NULL) EXIT(1);
 141         BIO_set_fp(out,stdout,BIO_NOCLOSE);
 142
 143         for (i=0; i<200; i++)
 144                 {
 145                 RAND_bytes(&c,1);
 146                 c=(c%BN_BITS)-BN_BITS2;
 147                 BN_rand(a,NUM_BITS+c,0,0);
 148
 149                 RAND_bytes(&c,1);
 150                 c=(c%BN_BITS)-BN_BITS2;
 151                 BN_rand(b,NUM_BITS+c,0,0);
 152
 153                 RAND_bytes(&c,1);
 154                 c=(c%BN_BITS)-BN_BITS2;
 155                 BN_rand(m,NUM_BITS+c,0,1);
 156
 157                 BN_mod(a,a,m,ctx);
 158                 BN_mod(b,b,m,ctx);
 159
 160                 ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);
 161                 if (ret <= 0)
 162                         {
 163                         printf("BN_mod_exp_mont() problems\n");
 164                         ERR_print_errors(out);
 165                         EXIT(1);
 166                         }
 167
 168                 ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);
 169                 if (ret <= 0)
 170                         {
 171                         printf("BN_mod_exp_recp() problems\n");
 172                         ERR_print_errors(out);
 173                         EXIT(1);
 174                         }
 175
 176                 ret=BN_mod_exp_simple(r_simple,a,b,m,ctx);
 177                 if (ret <= 0)
 178                         {
 179                         printf("BN_mod_exp_simple() problems\n");
 180                         ERR_print_errors(out);
 181                         EXIT(1);
 182                         }
 183
 184                 ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL);
 185                 if (ret <= 0)
 186                         {
 187                         printf("BN_mod_exp_mont_consttime() problems\n");
 188                         ERR_print_errors(out);
 189                         EXIT(1);
 190                         }
 191
 192                 if (BN_cmp(r_simple, r_mont) == 0
 193                     && BN_cmp(r_simple,r_recp) == 0
 194                         && BN_cmp(r_simple,r_mont_const) == 0)
 195                         {
 196                         printf(".");
 197                         fflush(stdout);
 198                         }
 199                 else
 200                         {
 201                         if (BN_cmp(r_simple,r_mont) != 0)
 202                                 printf("\nsimple and mont results differ\n");
 203                         if (BN_cmp(r_simple,r_mont_const) != 0)
 204                                 printf("\nsimple and mont const time results differ\n");
 205                         if (BN_cmp(r_simple,r_recp) != 0)
 206                                 printf("\nsimple and recp results differ\n");
 207
 208                         printf("a (%3d) = ",BN_num_bits(a));   BN_print(out,a);
 209                         printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);
 210                         printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);
 211                         printf("\nsimple   ="); BN_print(out,r_simple);
 212                         printf("\nrecp     ="); BN_print(out,r_recp);
 213                         printf("\nmont     ="); BN_print(out,r_mont);
 214                         printf("\nmont_ct  ="); BN_print(out,r_mont_const);
 215                         printf("\n");
 216                         EXIT(1);
 217                         }
 218                 }
 219         BN_free(r_mont);
 220         BN_free(r_mont_const);
 221         BN_free(r_recp);
 222         BN_free(r_simple);
 223         BN_free(a);
 224         BN_free(b);
 225         BN_free(m);
 226         BN_CTX_free(ctx);
 227         ERR_remove_thread_state(NULL);
 228         CRYPTO_mem_leaks(out);
 229         BIO_free(out);
 230         printf("\n");
 231
 232         if (test_exp_mod_zero() != 0)
 233                 goto err;
 234
 235         printf("done\n");
 236
 237         EXIT(0);
 238 err:
 239         ERR_load_crypto_strings();
 240         ERR_print_errors(out);
 241 #ifdef OPENSSL_SYS_NETWARE
 242     printf("ERROR\n");
 243 #endif
 244         EXIT(1);
 245         return(1);
 246         }
 247