commit d0e0c035209c4c80cf364d8bd7403aa94159aac6
author Janos Follath <janos.follath@gmail.com> Sun Oct 25 10:58:03 2015 +0100
committer Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Fri Jan 08 14:47:16 2016 +0100
tree 8aefb48141323c54394a81db073042c06c7b3d0c
parent ddf118961a2214bb21eebb241fdccd4bf186b8e2

Tests and fix added for #309 (inplace mpi doubling).

library/bignum.c

diff --git a/library/bignum.c b/library/bignum.c
index 0e587f1..d8b842f 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -887,7 +887,12 @@
 
     if( X == B )
     {
-        const mbedtls_mpi *T = A; A = X; B = T;
+        const mbedtls_mpi *T;
+
+        if( B == A)
+            return mbedtls_mpi_shift_l( X, 1 );
+
+        T = A; A = X; B = T;
     }
 
     if( X != A )