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view libtommath/bn_mp_clamp.c @ 1289:a23386821e9f

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Add -c <command> option to force a specific command This change adds a -c option to dropbear, to force the session to use a specific command, in a similar fashion to OpenSSH's ForceCommand configuration option. This is useful to provide a simple fixed service over ssh, without requiring an authorized key file for the per-key forced_command option. This setting takes precedence over the channel session's provided command, and the per-key forced_command setting. Signed-off-by: Jeremy Kerr <[email protected]>
author Jeremy Kerr <jk@ozlabs.org>
date Tue, 12 Apr 2016 21:01:08 +0800
parents 5ff8218bcee9
children 60fc6476e044
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#include <tommath.h>
#ifdef BN_MP_CLAMP_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis
 *
 * LibTomMath is a library that provides multiple-precision
 * integer arithmetic as well as number theoretic functionality.
 *
 * The library was designed directly after the MPI library by
 * Michael Fromberger but has been written from scratch with
 * additional optimizations in place.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, [email protected], http://math.libtomcrypt.com
 */

/* trim unused digits 
 *
 * This is used to ensure that leading zero digits are
 * trimed and the leading "used" digit will be non-zero
 * Typically very fast.  Also fixes the sign if there
 * are no more leading digits
 */
void
mp_clamp (mp_int * a)
{
  /* decrease used while the most significant digit is
   * zero.
   */
  while (a->used > 0 && a->dp[a->used - 1] == 0) {
    --(a->used);
  }

  /* reset the sign flag if used == 0 */
  if (a->used == 0) {
    a->sign = MP_ZPOS;
  }
}
#endif

/* $Source: /cvs/libtom/libtommath/bn_mp_clamp.c,v $ */
/* $Revision: 1.3 $ */
/* $Date: 2006/03/31 14:18:44 $ */