1 /* crypto/bn/exptest.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
67 #include "../bio/bss_file.c"
70 #define NUM_BITS (BN_BITS*2)
80 BIGNUM *r_mont,*r_recp,*a,*b,*m;
82 ERR_load_BN_strings();
85 if (ctx == NULL) exit(1);
91 if ( (r_mont == NULL) || (r_recp == NULL) ||
92 (a == NULL) || (b == NULL))
95 out=BIO_new(BIO_s_file());
97 if (out == NULL) exit(1);
98 BIO_set_fp(out,stdout,BIO_NOCLOSE);
100 for (i=0; i<200; i++)
103 c=(c%BN_BITS)-BN_BITS2;
104 BN_rand(a,NUM_BITS+c,0,0);
107 c=(c%BN_BITS)-BN_BITS2;
108 BN_rand(b,NUM_BITS+c,0,0);
111 c=(c%BN_BITS)-BN_BITS2;
112 BN_rand(m,NUM_BITS+c,0,1);
117 ret=BN_mod_exp_mont(r_mont,a,b,m,ctx,NULL);
120 printf("BN_mod_exp_mont() problems\n");
121 ERR_print_errors(out);
125 ret=BN_mod_exp_recp(r_recp,a,b,m,ctx);
128 printf("BN_mod_exp_recp() problems\n");
129 ERR_print_errors(out);
133 if (BN_cmp(r_mont,r_recp) != 0)
135 printf("\nmont and recp results differ\n");
136 printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a);
137 printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b);
138 printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m);
139 printf("\nrecp ="); BN_print(out,r_recp);
140 printf("\nmont ="); BN_print(out,r_mont);
150 CRYPTO_mem_leaks(out);
154 ERR_load_crypto_strings();
155 ERR_print_errors(out);