1 /* crypto/bn/exptest.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 int main(int argc, char *argv[]) 75 { 76 BN_CTX *ctx; 77 BIO *out=NULL; 78 int i,ret; 79 unsigned char c; 80 BIGNUM *r_mont,*r_mont_const,*r_recp,*r_simple,*a,*b,*m; 81 82 RAND_seed(rnd_seed, sizeof rnd_seed); /* or BN_rand may fail, and we don't 83 * even check its return value 84 * (which we should) */ 85 86 ERR_load_BN_strings(); 87 88 ctx=BN_CTX_new(); 89 if (ctx == NULL) EXIT(1); 90 r_mont=BN_new(); 91 r_mont_const=BN_new(); 92 r_recp=BN_new(); 93 r_simple=BN_new(); 94 a=BN_new(); 95 b=BN_new(); 96 m=BN_new(); 97 if ( (r_mont == NULL) || (r_recp == NULL) || 98 (a == NULL) || (b == NULL)) 99 goto err; 100 101 out=BIO_new(BIO_s_file()); 102 103 if (out == NULL) EXIT(1); 104 BIO_set_fp(out,stdout,BIO_NOCLOSE); 105 106 for (i=0; i<200; i++) 107 { 108 RAND_bytes(&c,1); 109 c=(c%BN_BITS)-BN_BITS2; 110 BN_rand(a,NUM_BITS+c,0,0); 111 112 RAND_bytes(&c,1); 113 c=(c%BN_BITS)-BN_BITS2; 114 BN_rand(b,NUM_BITS+c,0,0); 115 116 RAND_bytes(&c,1); 117 c=(c%BN_BITS)-BN_BITS2; 118 BN_rand(m,NUM_BITS+c,0,1); 119 120 BN_mod(a,a,m,ctx); 121 BN_mod(b,b,m,ctx); 122 123 ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL); 124 if (ret <= 0) 125 { 126 printf("BN_mod_exp_mont() problems\n"); 127 ERR_print_errors(out); 128 EXIT(1); 129 } 130 131 ret=BN_mod_exp_recp(r_recp,a,b,m,ctx); 132 if (ret <= 0) 133 { 134 printf("BN_mod_exp_recp() problems\n"); 135 ERR_print_errors(out); 136 EXIT(1); 137 } 138 139 ret=BN_mod_exp_simple(r_simple,a,b,m,ctx); 140 if (ret <= 0) 141 { 142 printf("BN_mod_exp_simple() problems\n"); 143 ERR_print_errors(out); 144 EXIT(1); 145 } 146 147 ret=BN_mod_exp_mont_consttime(r_mont_const,a,b,m,ctx,NULL); 148 if (ret <= 0) 149 { 150 printf("BN_mod_exp_mont_consttime() problems\n"); 151 ERR_print_errors(out); 152 EXIT(1); 153 } 154 155 if (BN_cmp(r_simple, r_mont) == 0 156 && BN_cmp(r_simple,r_recp) == 0 157 && BN_cmp(r_simple,r_mont_const) == 0) 158 { 159 printf("."); 160 fflush(stdout); 161 } 162 else 163 { 164 if (BN_cmp(r_simple,r_mont) != 0) 165 printf("\nsimple and mont results differ\n"); 166 if (BN_cmp(r_simple,r_mont) != 0) 167 printf("\nsimple and mont const time results differ\n"); 168 if (BN_cmp(r_simple,r_recp) != 0) 169 printf("\nsimple and recp results differ\n"); 170 171 printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a); 172 printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b); 173 printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m); 174 printf("\nsimple ="); BN_print(out,r_simple); 175 printf("\nrecp ="); BN_print(out,r_recp); 176 printf("\nmont ="); BN_print(out,r_mont); 177 printf("\nmont_ct ="); BN_print(out,r_mont_const); 178 printf("\n"); 179 EXIT(1); 180 } 181 } 182 BN_free(r_mont); 183 BN_free(r_mont_const); 184 BN_free(r_recp); 185 BN_free(r_simple); 186 BN_free(a); 187 BN_free(b); 188 BN_free(m); 189 BN_CTX_free(ctx); 190 ERR_remove_state(0); 191 CRYPTO_mem_leaks(out); 192 BIO_free(out); 193 printf(" done\n"); 194 EXIT(0); 195 err: 196 ERR_load_crypto_strings(); 197 ERR_print_errors(out); 198 #ifdef OPENSSL_SYS_NETWARE 199 printf("ERROR\n"); 200 #endif 201 EXIT(1); 202 return(1); 203 } 204 205
