LCOV - code coverage report
Current view: top level - source4/heimdal/lib/hcrypto/libtommath - bn_mp_rand.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 0 14 0.0 %
Date: 2021-09-23 10:06:22 Functions: 0 1 0.0 %

          Line data    Source code
       1             : #include <tommath.h>
       2             : #ifdef BN_MP_RAND_C
       3             : /* LibTomMath, multiple-precision integer library -- Tom St Denis
       4             :  *
       5             :  * LibTomMath is a library that provides multiple-precision
       6             :  * integer arithmetic as well as number theoretic functionality.
       7             :  *
       8             :  * The library was designed directly after the MPI library by
       9             :  * Michael Fromberger but has been written from scratch with
      10             :  * additional optimizations in place.
      11             :  *
      12             :  * The library is free for all purposes without any express
      13             :  * guarantee it works.
      14             :  *
      15             :  * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
      16             :  */
      17             : 
      18             : /* makes a pseudo-random int of a given size */
      19             : int
      20           0 : mp_rand (mp_int * a, int digits)
      21             : {
      22             :   int     res;
      23             :   mp_digit d;
      24             : 
      25           0 :   mp_zero (a);
      26           0 :   if (digits <= 0) {
      27           0 :     return MP_OKAY;
      28             :   }
      29             : 
      30             :   /* first place a random non-zero digit */
      31             :   do {
      32           0 :     d = ((mp_digit) abs (rand ())) & MP_MASK;
      33           0 :   } while (d == 0);
      34             : 
      35           0 :   if ((res = mp_add_d (a, d, a)) != MP_OKAY) {
      36           0 :     return res;
      37             :   }
      38             : 
      39           0 :   while (--digits > 0) {
      40           0 :     if ((res = mp_lshd (a, 1)) != MP_OKAY) {
      41           0 :       return res;
      42             :     }
      43             : 
      44           0 :     if ((res = mp_add_d (a, ((mp_digit) abs (rand ())), a)) != MP_OKAY) {
      45           0 :       return res;
      46             :     }
      47             :   }
      48             : 
      49           0 :   return MP_OKAY;
      50             : }
      51             : #endif
      52             : 
      53             : /* $Source: /cvs/libtom/libtommath/bn_mp_rand.c,v $ */
      54             : /* $Revision: 1.4 $ */
      55             : /* $Date: 2006/12/28 01:25:13 $ */

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