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improve mp_lshd

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This fixes #61
This commit is contained in:
Steffen Jaeckel 2017-08-29 23:53:02 +02:00
parent 1d03522625
commit 356084ee31
1 changed files with 4 additions and 0 deletions
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4
bn_mp_lshd.c
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@ -24,6 +24,10 @@ int mp_lshd(mp_int *a, int b)
if (b <= 0) { if (b <= 0) {
return MP_OKAY; return MP_OKAY;
} }
/* no need to shift 0 around */
if (mp_iszero(a) == MP_YES) {
return MP_OKAY;
}
/* grow to fit the new digits */ /* grow to fit the new digits */
if (a->alloc < (a->used + b)) { if (a->alloc < (a->used + b)) {