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1 | /* crypto/bn/exptest.c */ |
2 | /* Copyright (C) 1995-1997 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 | #include "bio.h" | |
63 | #include "bn.h" | |
64 | #include "rand.h" | |
65 | #include "err.h" | |
66 | ||
67 | #define NUM_BITS (BN_BITS*2) | |
68 | ||
69 | int main(argc,argv) | |
70 | int argc; | |
71 | char *argv[]; | |
72 | { | |
73 | BN_CTX *ctx; | |
74 | BIO *out=NULL; | |
75 | int i,ret; | |
76 | unsigned char c; | |
77 | BIGNUM *r_mont,*r_recp,*a,*b,*m; | |
78 | ||
79 | ctx=BN_CTX_new(); | |
80 | if (ctx == NULL) exit(1); | |
81 | r_mont=BN_new(); | |
82 | r_recp=BN_new(); | |
83 | a=BN_new(); | |
84 | b=BN_new(); | |
85 | m=BN_new(); | |
86 | if ( (r_mont == NULL) || (r_recp == NULL) || | |
87 | (a == NULL) || (b == NULL)) | |
88 | goto err; | |
89 | ||
90 | #ifdef WIN16 | |
91 | out=BIO_new(BIO_s_file_internal_w16()); | |
92 | #else | |
93 | out=BIO_new(BIO_s_file()); | |
94 | #endif | |
95 | if (out == NULL) exit(1); | |
96 | BIO_set_fp(out,stdout,BIO_NOCLOSE); | |
97 | ||
98 | for (i=0; i<200; i++) | |
99 | { | |
100 | RAND_bytes(&c,1); | |
101 | c=(c%BN_BITS)-BN_BITS2; | |
102 | BN_rand(a,NUM_BITS+c,0,0); | |
103 | ||
104 | RAND_bytes(&c,1); | |
105 | c=(c%BN_BITS)-BN_BITS2; | |
106 | BN_rand(b,NUM_BITS+c,0,0); | |
107 | ||
108 | RAND_bytes(&c,1); | |
109 | c=(c%BN_BITS)-BN_BITS2; | |
110 | BN_rand(m,NUM_BITS+c,0,1); | |
111 | ||
112 | BN_mod(a,a,m,ctx); | |
113 | BN_mod(b,b,m,ctx); | |
114 | ||
115 | ret=BN_mod_exp_mont(r_mont,a,b,m,ctx); | |
116 | if (ret <= 0) | |
117 | { printf("BN_mod_exp_mont() problems\n"); exit(1); } | |
118 | ||
119 | ret=BN_mod_exp_recp(r_recp,a,b,m,ctx); | |
120 | if (ret <= 0) | |
121 | { printf("BN_mod_exp_recp() problems\n"); exit(1); } | |
122 | ||
123 | if (BN_cmp(r_mont,r_recp) != 0) | |
124 | { | |
125 | printf("\nmont and recp results differ\n"); | |
126 | printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a); | |
127 | printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b); | |
128 | printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m); | |
129 | printf("\nrecp ="); BN_print(out,r_recp); | |
130 | printf("\nmont ="); BN_print(out,r_mont); | |
131 | printf("\n"); | |
132 | exit(1); | |
133 | } | |
134 | else | |
135 | { | |
136 | printf("."); | |
137 | fflush(stdout); | |
138 | } | |
139 | } | |
140 | printf(" done\n"); | |
141 | exit(0); | |
142 | err: | |
143 | ERR_load_crypto_strings(); | |
144 | ERR_print_errors(out); | |
145 | exit(1); | |
146 | return(1); | |
147 | } | |
148 |