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Fix goof in mp_reduce_mod_2to.

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It correctly masked off bits in the partial word, but then left all
higher words _unchanged_ rather than zeroing them.

Apparently its use in mp_invert_mod_2to was in restricted enough
circumstances not to cause a failure there!
This commit is contained in:
Simon Tatham 2019-01-03 10:37:19 +00:00
parent 34d78286e6
commit df1ed3ba6e
1 changed files with 1 additions and 1 deletions
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2
mpint.c
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@ -1124,7 +1124,7 @@ void mp_reduce_mod_2to(mp_int *x, size_t p)
size_t mask = ((size_t)1 << (p % BIGNUM_INT_BITS)) - 1; size_t mask = ((size_t)1 << (p % BIGNUM_INT_BITS)) - 1;
for (; word < x->nw; word++) { for (; word < x->nw; word++) {
x->w[word] &= mask; x->w[word] &= mask;
mask = -(size_t)1; mask = 0;
} }
} }