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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bn/exptest.c
1 /* crypto/bn/exptest.c */
2 /* Copyright (C) 1995-1997 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 #define NUM_BITS (BN_BITS*2)
77 BIGNUM
*r_mont
,*r_recp
,*a
,*b
,*m
;
80 if (ctx
== NULL
) exit(1);
86 if ( (r_mont
== NULL
) || (r_recp
== NULL
) ||
87 (a
== NULL
) || (b
== NULL
))
91 out
=BIO_new(BIO_s_file_internal_w16());
93 out
=BIO_new(BIO_s_file());
95 if (out
== NULL
) exit(1);
96 BIO_set_fp(out
,stdout
,BIO_NOCLOSE
);
101 c
=(c
%BN_BITS
)-BN_BITS2
;
102 BN_rand(a
,NUM_BITS
+c
,0,0);
105 c
=(c
%BN_BITS
)-BN_BITS2
;
106 BN_rand(b
,NUM_BITS
+c
,0,0);
109 c
=(c
%BN_BITS
)-BN_BITS2
;
110 BN_rand(m
,NUM_BITS
+c
,0,1);
115 ret
=BN_mod_exp_mont(r_mont
,a
,b
,m
,ctx
);
117 { printf("BN_mod_exp_mont() problems\n"); exit(1); }
119 ret
=BN_mod_exp_recp(r_recp
,a
,b
,m
,ctx
);
121 { printf("BN_mod_exp_recp() problems\n"); exit(1); }
123 if (BN_cmp(r_mont
,r_recp
) != 0)
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
);
143 ERR_load_crypto_strings();
144 ERR_print_errors(out
);