Removed recursion from fix #309.
diff --git a/library/bignum.c b/library/bignum.c
index 5e25123..9c38117 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -859,22 +859,21 @@
int ret;
size_t i, j;
mbedtls_mpi_uint *o, *p, c;
+ mbedtls_mpi TB;
if( X == B )
{
+ B = A; A = X;
+
if( B == A )
{
// Making a temporary copy instead of shifting by one to deny
// the possibility of corresponding side-channel attacks.
- mbedtls_mpi TB;
-
mbedtls_mpi_init( &TB );
MBEDTLS_MPI_CHK( mbedtls_mpi_copy( &TB, B ) );
- return mbedtls_mpi_add_abs( X, A, &TB );
+ B = &TB;
}
-
- B = A; A = X;
}
if( X != A )
@@ -911,6 +910,10 @@
}
cleanup:
+ if( &TB == B )
+ {
+ mbedtls_mpi_free( &TB );
+ }
return( ret );
}
