From 1218e286e5838e225a26875cb934bcbae48b3e17 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Tue, 15 Nov 2016 06:25:49 -0800
Subject: mpi: must clamp result of conversion to bignum.

* mpi/mpi.c (mp_set_uintptr, mp_set_double_intptr): The value of z might
not require all of the digits implied by the size of its C data type.
We must clamp the result to trim trailing zero limbs from the bignum.
---
 mpi/mpi.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'mpi')

diff --git a/mpi/mpi.c b/mpi/mpi.c
index 2777fa21..2a2fea0d 100644
--- a/mpi/mpi.c
+++ b/mpi/mpi.c
@@ -566,6 +566,7 @@ mp_err mp_set_uintptr(mp_int *mp, uint_ptr_t z)
 	DIGIT(mp, ix) = (z >> shift) & MP_DIGIT_MAX;
     }
 
+    s_mp_clamp(mp);
   } else {
     mp_set(mp, z);
   }
@@ -635,6 +636,8 @@ mp_err mp_set_double_intptr(mp_int *mp, double_intptr_t z)
     DIGIT(mp, ix) = (v >> shift) & MP_DIGIT_MAX;
   }
 
+  s_mp_clamp(mp);
+
   if(z < 0)
     SIGN(mp) = MP_NEG;
 
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