+
+/* GCM definitions */
+
+typedef struct { u64 hi,lo; } u128;
+
+#ifdef TABLE_BITS
+#undef TABLE_BITS
+#endif
+/*
+ * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
+ * never be set to 8 [or 1]. For further information see gcm128.c.
+ */
+#define TABLE_BITS 4
+
+struct gcm128_context {
+ /* Following 6 names follow names in GCM specification */
+ union { u64 u[2]; u32 d[4]; u8 c[16]; size_t t[16/sizeof(size_t)]; }
+ Yi,EKi,EK0,len,Xi,H;
+ /* Relative position of Xi, H and pre-computed Htable is used
+ * in some assembler modules, i.e. don't change the order! */
+#if TABLE_BITS==8
+ u128 Htable[256];
+#else
+ u128 Htable[16];
+ void (*gmult)(u64 Xi[2],const u128 Htable[16]);
+ void (*ghash)(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
+#endif
+ unsigned int mres, ares;
+ block128_f block;
+ void *key;
+};
+
+struct xts128_context {
+ void *key1, *key2;
+ block128_f block1,block2;
+};
+
+struct ccm128_context {
+ union { u64 u[2]; u8 c[16]; } nonce, cmac;
+ u64 blocks;
+ block128_f block;
+ void *key;
+};
+