moved typedefs to beginning of files to solve some include problems

splitted authenticator to have a separate implementation for each auth_method_t
using va_copy to clone va_lists, should fix proplems on AMD64
some other cleanups

src/libstrongswan/crypto/diffie_hellman.h

@@ -24,18 +24,18 @@
 #ifndef DIFFIE_HELLMAN_H_
 #define DIFFIE_HELLMAN_H_
 
+typedef enum diffie_hellman_group_t diffie_hellman_group_t;
+typedef struct diffie_hellman_t diffie_hellman_t;
+
 #include <types.h>
 
-
-typedef enum diffie_hellman_group_t diffie_hellman_group_t;
-
-/** 
+/**
  * @brief Diffie-Hellman group.
- * 
+ *
  * The modulus (or group) to use for a Diffie-Hellman calculation.
- * 
+ *
  * See IKEv2 RFC 3.3.2 and RFC 3526.
- * 
+ *
  * @ingroup transforms
  */
 enum diffie_hellman_group_t {
@@ -55,9 +55,6 @@ enum diffie_hellman_group_t {
  */
 extern enum_name_t *diffie_hellman_group_names;
 
-
-typedef struct diffie_hellman_t diffie_hellman_t;
-
 /**
  * @brief Implementation of the widely used Diffie-Hellman algorithm.
  *