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.

1 files changed, 3 insertions, 0 deletions

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;