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Diffstat (limited to 'crypto/bn/exptest.c')
| -rw-r--r-- | crypto/bn/exptest.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/crypto/bn/exptest.c b/crypto/bn/exptest.c new file mode 100644 index 0000000000..4880df1116 --- /dev/null +++ b/crypto/bn/exptest.c @@ -0,0 +1,148 @@ +/* crypto/bn/exptest.c */ +/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "bio.h" +#include "bn.h" +#include "rand.h" +#include "err.h" + +#define NUM_BITS (BN_BITS*2) + +int main(argc,argv) +int argc; +char *argv[]; + { + BN_CTX *ctx; + BIO *out=NULL; + int i,ret; + unsigned char c; + BIGNUM *r_mont,*r_recp,*a,*b,*m; + + ctx=BN_CTX_new(); + if (ctx == NULL) exit(1); + r_mont=BN_new(); + r_recp=BN_new(); + a=BN_new(); + b=BN_new(); + m=BN_new(); + if ( (r_mont == NULL) || (r_recp == NULL) || + (a == NULL) || (b == NULL)) + goto err; + +#ifdef WIN16 + out=BIO_new(BIO_s_file_internal_w16()); +#else + out=BIO_new(BIO_s_file()); +#endif + if (out == NULL) exit(1); + BIO_set_fp(out,stdout,BIO_NOCLOSE); + + for (i=0; i<200; i++) + { + RAND_bytes(&c,1); + c=(c%BN_BITS)-BN_BITS2; + BN_rand(a,NUM_BITS+c,0,0); + + RAND_bytes(&c,1); + c=(c%BN_BITS)-BN_BITS2; + BN_rand(b,NUM_BITS+c,0,0); + + RAND_bytes(&c,1); + c=(c%BN_BITS)-BN_BITS2; + BN_rand(m,NUM_BITS+c,0,1); + + BN_mod(a,a,m,ctx); + BN_mod(b,b,m,ctx); + + ret=BN_mod_exp_mont(r_mont,a,b,m,ctx); + if (ret <= 0) + { printf("BN_mod_exp_mont() problems\n"); exit(1); } + + ret=BN_mod_exp_recp(r_recp,a,b,m,ctx); + if (ret <= 0) + { printf("BN_mod_exp_recp() problems\n"); exit(1); } + + if (BN_cmp(r_mont,r_recp) != 0) + { + printf("\nmont and recp results differ\n"); + printf("a (%3d) = ",BN_num_bits(a)); BN_print(out,a); + printf("\nb (%3d) = ",BN_num_bits(b)); BN_print(out,b); + printf("\nm (%3d) = ",BN_num_bits(m)); BN_print(out,m); + printf("\nrecp ="); BN_print(out,r_recp); + printf("\nmont ="); BN_print(out,r_mont); + printf("\n"); + exit(1); + } + else + { + printf("."); + fflush(stdout); + } + } + printf(" done\n"); + exit(0); +err: + ERR_load_crypto_strings(); + ERR_print_errors(out); + exit(1); + return(1); + } + |