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Add input check to mp_unpack #601

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Add input check to mp_unpack #601

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4 changes: 4 additions & 0 deletions mp_unpack.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,10 @@ mp_err mp_unpack(mp_int *rop, size_t count, mp_order order, size_t size,
size_t odd_nails, nail_bytes, i, j;
uint8_t odd_nail_mask;

if ((size == 0u) || (nails >= (size * 8u))) {
return MP_VAL;
}

mp_zero(rop);

if (endian == MP_NATIVE_ENDIAN) {
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