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RAND: use unsigned long instead of mp_digit

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if we use mp_set_int() instead of mp_set(), then we can use
full unsigned long integers instead of single digits. This
seems a lot safer, especially for future versions of the
random algorithm.
This commit is contained in:
hasufell 2014-04-15 18:21:42 +02:00
parent 783858a52c
commit 91c5ea7b82
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GPG Key ID: 220CD1C5BDEED020
1 changed files with 5 additions and 5 deletions
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10
src/rand.c
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@ -36,7 +36,7 @@
/* /*
* static declarations * static declarations
*/ */
static mp_digit get_urnd_int_small(int *sign); static unsigned long get_urnd_int_small(int *sign);
/** /**
@ -46,7 +46,7 @@ static mp_digit get_urnd_int_small(int *sign);
* @param sign stores the signness [out] * @param sign stores the signness [out]
* @return random small integer * @return random small integer
*/ */
static mp_digit get_urnd_int_small(int *sign) static unsigned long get_urnd_int_small(int *sign)
{ {
int random_data; int random_data;
mp_digit random_int; mp_digit random_int;
@ -86,11 +86,11 @@ pb_poly *ntru_get_urnd_poly_small(ntru_context *ctx)
init_polynom_size(poly, &chara, ctx->N); init_polynom_size(poly, &chara, ctx->N);
mp_clear(&chara); mp_clear(&chara);
for (int i = 0; i < ctx->N; i++) { for (unsigned int i = 0; i < ctx->N; i++) {
int sign; int sign;
int c = get_urnd_int_small(&sign); unsigned long c = get_urnd_int_small(&sign);
mp_set(&(poly->terms[i]), (mp_digit)c); mp_set_int(&(poly->terms[i]), c);
if (sign == 1) if (sign == 1)
poly->terms[i].sign = 1; poly->terms[i].sign = 1;