Mercurial > dropbear
diff bn_mp_init_size.c @ 142:d29b64170cf0 libtommath-orig
import of libtommath 0.32
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sun, 19 Dec 2004 11:33:56 +0000 |
| parents | 86e0b50a9b58 |
| children |
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--- a/bn_mp_init_size.c Tue Jun 15 14:42:57 2004 +0000 +++ b/bn_mp_init_size.c Sun Dec 19 11:33:56 2004 +0000 @@ -1,3 +1,5 @@ +#include <tommath.h> +#ifdef BN_MP_INIT_SIZE_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision @@ -12,22 +14,31 @@ * * Tom St Denis, [email protected], http://math.libtomcrypt.org */ -#include <tommath.h> /* init an mp_init for a given size */ int mp_init_size (mp_int * a, int size) { + int x; + /* pad size so there are always extra digits */ size += (MP_PREC * 2) - (size % MP_PREC); /* alloc mem */ - a->dp = OPT_CAST(mp_digit) XCALLOC (sizeof (mp_digit), size); + a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size); if (a->dp == NULL) { return MP_MEM; } + + /* set the members */ a->used = 0; a->alloc = size; a->sign = MP_ZPOS; + /* zero the digits */ + for (x = 0; x < size; x++) { + a->dp[x] = 0; + } + return MP_OKAY; } +#endif