RAND: use unsigned long instead of mp_digit
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.
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src/rand.c
10
src/rand.c
@ -36,7 +36,7 @@
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/*
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* static declarations
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*/
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static mp_digit get_urnd_int_small(int *sign);
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static unsigned long get_urnd_int_small(int *sign);
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/**
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@ -46,7 +46,7 @@ static mp_digit get_urnd_int_small(int *sign);
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* @param sign stores the signness [out]
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* @return random small integer
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*/
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static mp_digit get_urnd_int_small(int *sign)
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static unsigned long get_urnd_int_small(int *sign)
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{
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int random_data;
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mp_digit random_int;
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@ -86,11 +86,11 @@ pb_poly *ntru_get_urnd_poly_small(ntru_context *ctx)
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init_polynom_size(poly, &chara, ctx->N);
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mp_clear(&chara);
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for (int i = 0; i < ctx->N; i++) {
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for (unsigned int i = 0; i < ctx->N; i++) {
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int sign;
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int c = get_urnd_int_small(&sign);
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unsigned long c = get_urnd_int_small(&sign);
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mp_set(&(poly->terms[i]), (mp_digit)c);
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mp_set_int(&(poly->terms[i]), c);
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if (sign == 1)
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poly->terms[i].sign = 1;
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