From 5bc653f0ef3897cb9a0deecac221eac8e2bbecea Mon Sep 17 00:00:00 2001 From: Steffen Jaeckel Date: Mon, 7 Oct 2013 17:20:57 -0500 Subject: [PATCH] libtommath: allow mp_shrink to shrink initialized, but empty MPI's from https://github.com/libtom/libtommath Change-Id: I5814caeb44db710957152a7d47b03f9beb6e5147 --- lib/hcrypto/libtommath/bn_mp_shrink.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/lib/hcrypto/libtommath/bn_mp_shrink.c b/lib/hcrypto/libtommath/bn_mp_shrink.c index 4b8c5ef11..c600efc58 100644 --- a/lib/hcrypto/libtommath/bn_mp_shrink.c +++ b/lib/hcrypto/libtommath/bn_mp_shrink.c @@ -19,12 +19,17 @@ int mp_shrink (mp_int * a) { mp_digit *tmp; - if (a->alloc != a->used && a->used > 0) { - if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * a->used)) == NULL) { + int used = 1; + + if(a->used > 0) + used = a->used; + + if (a->alloc != used) { + if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * used)) == NULL) { return MP_MEM; } a->dp = tmp; - a->alloc = a->used; + a->alloc = used; } return MP_OKAY; }