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integer.c: fast mod reduce fix

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When using small stack, not enough memory uas being allocated in
fast_mp_montgomery_reduce().
Allocate the required space and memset all used memory.
This commit is contained in:
Sean Parkinson
2023-02-07 11:29:53 +10:00
parent 2448adf68b
commit 20ae076b80
1 changed files with 2 additions and 2 deletions
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wolfcrypt/src/integer.c
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@ -2512,13 +2512,13 @@ int fast_mp_montgomery_reduce (mp_int * x, mp_int * n, mp_digit rho)
}
#ifdef WOLFSSL_SMALL_STACK
W = (mp_word*)XMALLOC(sizeof(mp_word) * (n->used * 2 + 1), NULL,
W = (mp_word*)XMALLOC(sizeof(mp_word) * (n->used * 2 + 2), NULL,
DYNAMIC_TYPE_BIGINT);
if (W == NULL)
return MP_MEM;
#endif
XMEMSET(W, 0, sizeof(mp_word) * (n->used * 2 + 1));
XMEMSET(W, 0, sizeof(mp_word) * (n->used * 2 + 2));
/* first we have to get the digits of the input into
* an array of double precision words W[...]