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Diffstat (limited to 'security/nss/lib/freebl/mpi/utils/metime.c')
-rw-r--r-- | security/nss/lib/freebl/mpi/utils/metime.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/utils/metime.c b/security/nss/lib/freebl/mpi/utils/metime.c new file mode 100644 index 000000000..29ee59050 --- /dev/null +++ b/security/nss/lib/freebl/mpi/utils/metime.c @@ -0,0 +1,136 @@ +/* + * metime.c + * + * Modular exponentiation timing test + * + * $Id$ + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library. + * + * The Initial Developer of the Original Code is + * Michael J. Fromberger. + * Portions created by the Initial Developer are Copyright (C) 2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Netscape Communications Corporation + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ +/* $Id$ */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <limits.h> +#include <time.h> + +#include "mpi.h" +#include "mpprime.h" + +double clk_to_sec(clock_t start, clock_t stop); + +int main(int argc, char *argv[]) +{ + int ix, num, prec = 8; + unsigned int seed; + clock_t start, stop; + double sec; + + mp_int a, m, c; + + if(getenv("SEED") != NULL) + seed = abs(atoi(getenv("SEED"))); + else + seed = (unsigned int)time(NULL); + + if(argc < 2) { + fprintf(stderr, "Usage: %s <num-tests> [<nbits>]\n", argv[0]); + return 1; + } + + if((num = atoi(argv[1])) < 0) + num = -num; + + if(!num) { + fprintf(stderr, "%s: must perform at least 1 test\n", argv[0]); + return 1; + } + + if(argc > 2) { + if((prec = atoi(argv[2])) <= 0) + prec = 8; + else + prec = (prec + (DIGIT_BIT - 1)) / DIGIT_BIT; + + } + + printf("Modular exponentiation timing test\n" + "Precision: %d digits (%d bits)\n" + "# of tests: %d\n\n", prec, prec * DIGIT_BIT, num); + + mp_init_size(&a, prec); + mp_init_size(&m, prec); + mp_init_size(&c, prec); + + srand(seed); + + start = clock(); + for(ix = 0; ix < num; ix++) { + + mpp_random_size(&a, prec); + mpp_random_size(&c, prec); + mpp_random_size(&m, prec); + /* set msb and lsb of m */ + DIGIT(&m,0) |= 1; + DIGIT(&m, USED(&m)-1) |= (mp_digit)1 << (DIGIT_BIT - 1); + if (mp_cmp(&a, &m) > 0) + mp_sub(&a, &m, &a); + + mp_exptmod(&a, &c, &m, &c); + } + stop = clock(); + + sec = clk_to_sec(start, stop); + + printf("Total: %.3f seconds\n", sec); + printf("Individual: %.3f seconds\n", sec / num); + + mp_clear(&c); + mp_clear(&a); + mp_clear(&m); + + return 0; +} + +double clk_to_sec(clock_t start, clock_t stop) +{ + return (double)(stop - start) / CLOCKS_PER_SEC; +} + +/*------------------------------------------------------------------------*/ +/* HERE THERE BE DRAGONS */ |