LCOV - code coverage report
Current view: top level - source4/heimdal/lib/hcrypto/libtommath - bn_mp_read_unsigned_bin.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 9 12 75.0 %
Date: 2021-09-23 10:06:22 Functions: 1 1 100.0 %

          Line data    Source code
       1             : #include <tommath.h>
       2             : #ifdef BN_MP_READ_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             : /* reads a unsigned char array, assumes the msb is stored first [big endian] */
      19        2616 : int mp_read_unsigned_bin (mp_int * a, const unsigned char *b, int c)
      20             : {
      21             :   int     res;
      22             : 
      23             :   /* make sure there are at least two digits */
      24        2616 :   if (a->alloc < 2) {
      25           0 :      if ((res = mp_grow(a, 2)) != MP_OKAY) {
      26           0 :         return res;
      27             :      }
      28             :   }
      29             : 
      30             :   /* zero the int */
      31        2616 :   mp_zero (a);
      32             : 
      33             :   /* read the bytes in */
      34      746952 :   while (c-- > 0) {
      35      741720 :     if ((res = mp_mul_2d (a, 8, a)) != MP_OKAY) {
      36           0 :       return res;
      37             :     }
      38             : 
      39             : #ifndef MP_8BIT
      40      741720 :       a->dp[0] |= *b++;
      41      741720 :       a->used += 1;
      42             : #else
      43             :       a->dp[0] = (*b & MP_MASK);
      44             :       a->dp[1] |= ((*b++ >> 7U) & 1);
      45             :       a->used += 2;
      46             : #endif
      47             :   }
      48        2616 :   mp_clamp (a);
      49        2616 :   return MP_OKAY;
      50             : }
      51             : #endif
      52             : 
      53             : /* $Source: /cvs/libtom/libtommath/bn_mp_read_unsigned_bin.c,v $ */
      54             : /* $Revision: 1.5 $ */
      55             : /* $Date: 2006/12/28 01:25:13 $ */

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