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Diffstat (limited to 'bn_mp_unsigned_bin_size.c')
| -rw-r--r-- | bn_mp_unsigned_bin_size.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/bn_mp_unsigned_bin_size.c b/bn_mp_unsigned_bin_size.c new file mode 100644 index 0000000..091f406 --- /dev/null +++ b/bn_mp_unsigned_bin_size.c @@ -0,0 +1,24 @@ +#include <tommath.h> +#ifdef BN_MP_UNSIGNED_BIN_SIZE_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, tomstdenis@iahu.ca, http://math.libtomcrypt.org + */ + +/* get the size for an unsigned equivalent */ +int mp_unsigned_bin_size (mp_int * a) +{ + int size = mp_count_bits (a); + return (size / 8 + ((size & 7) != 0 ? 1 : 0)); +} +#endif |