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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
72static const char rnd_seed[] = "string to make the random number generator think it has entropy";
73
74int 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_const) != 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_thread_state(NULL);
191 CRYPTO_mem_leaks(out);
192 BIO_free(out);
193 printf(" done\n");
194 EXIT(0);
195err:
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
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