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/prfs/hmac_prf.h

@@ -24,12 +24,12 @@
 #ifndef PRF_HMAC_H_
 #define PRF_HMAC_H_
 
+typedef struct hmac_prf_t hmac_prf_t;
+
 #include <types.h>
 #include <crypto/prfs/prf.h>
 #include <crypto/hashers/hasher.h>
 
-typedef struct hmac_prf_t hmac_prf_t;
-
 /**
  * @brief Implementation of prf_t interface using the
  * HMAC algorithm.

src/libstrongswan/crypto/prfs/prf.h

@@ -24,9 +24,10 @@
 #ifndef PRF_H_
 #define PRF_H_
 
-#include <types.h>
-
 typedef enum pseudo_random_function_t pseudo_random_function_t;
+typedef struct prf_t prf_t;
+
+#include <types.h>
 
 /**
  * @brief Pseudo random function, as in IKEv2 RFC 3.3.2.
@@ -52,9 +53,6 @@ enum pseudo_random_function_t {
  */
 extern enum_name_t *pseudo_random_function_names;
 
-
-typedef struct prf_t prf_t;
-
 /**
  * @brief Generic interface for pseudo-random-functions.
  *