Line data    Source code

       1             : #include <tommath.h>
       2             : #ifdef BN_MP_TO_UNSIGNED_BIN_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             : /* store in unsigned [big endian] format */
      19         552 : int mp_to_unsigned_bin (mp_int * a, unsigned char *b)
      20             : {
      21             :   int     x, res;
      22             :   mp_int  t;
      23             : 
      24         552 :   if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
      25           0 :     return res;
      26             :   }
      27             : 
      28         536 :   x = 0;
      29      260142 :   while (mp_iszero (&t) == 0) {
      30             : #ifndef MP_8BIT
      31      259054 :       b[x++] = (unsigned char) (t.dp[0] & 255);
      32             : #else
      33             :       b[x++] = (unsigned char) (t.dp[0] | ((t.dp[1] & 0x01) << 7));
      34             : #endif
      35      259054 :     if ((res = mp_div_2d (&t, 8, &t, NULL)) != MP_OKAY) {
      36           0 :       mp_clear (&t);
      37           0 :       return res;
      38             :     }
      39             :   }
      40         552 :   bn_reverse (b, x);
      41         552 :   mp_clear (&t);
      42         552 :   return MP_OKAY;
      43             : }
      44             : #endif
      45             : 
      46             : /* $Source: /cvs/libtom/libtommath/bn_mp_to_unsigned_bin.c,v $ */
      47             : /* $Revision: 1.4 $ */
      48             : /* $Date: 2006/12/28 01:25:13 $ */