a lot of fixes

[avr-crypto-lib.git] / mugi / mugi.c

diff --git a/mugi/mugi.c b/mugi/mugi.c
index 0be9f9af57ab5a0d63cc645c8615041cf2fe3456..c90b1a1ea11ed4f522b2d50e3a8c02a47c73cdbb 100644 (file)
--- a/mugi/mugi.c
+++ b/mugi/mugi.c
@@ -65,16 +65,19 @@ void dump_mugi_ctx(mugi_ctx_t* ctx){
 #define GF256MUL_2(a) (gf256mul(2, (a), 0x1b))
 
 uint64_t changeendian64(uint64_t a){
-       uint8_t r[8];
-       r[0] = ((uint8_t*)&a)[7];
-       r[1] = ((uint8_t*)&a)[6];
-       r[2] = ((uint8_t*)&a)[5];
-       r[3] = ((uint8_t*)&a)[4];
-       r[4] = ((uint8_t*)&a)[3];
-       r[5] = ((uint8_t*)&a)[2];
-       r[6] = ((uint8_t*)&a)[1];
-       r[7] = ((uint8_t*)&a)[0];
-       return *((uint64_t*)r);
+       union {
+               uint8_t v8[8];
+               uint64_t v64;
+       } r;
+       r.v8[0] = ((uint8_t*)&a)[7];
+       r.v8[1] = ((uint8_t*)&a)[6];
+       r.v8[2] = ((uint8_t*)&a)[5];
+       r.v8[3] = ((uint8_t*)&a)[4];
+       r.v8[4] = ((uint8_t*)&a)[3];
+       r.v8[5] = ((uint8_t*)&a)[2];
+       r.v8[6] = ((uint8_t*)&a)[1];
+       r.v8[7] = ((uint8_t*)&a)[0];
+       return r.v64;
 }
 
 static