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diff --git a/src/libstrongswan/library.h b/src/libstrongswan/library.h
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+/**
+ * @file library.h
+ *
+ * @brief Helper functions and definitions.
+ *
+ */
+
+/*
+ * Copyright (C) 2006 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef LIBRARY_H_
+#define LIBRARY_H_
+
+/**
+ * @defgroup libstrongswan libstrongswan
+ *
+ * libstrongswan: library with various crypto related things.
+ */
+
+/**
+ * @defgroup asn1 asn1
+ *
+ * ASN1 definitions, parser and generator functions.
+ *
+ * @ingroup libstrongswan
+ */
+
+/**
+ * @defgroup crypto crypto
+ *
+ * Crypto algorithms of different kind.
+ *
+ * @ingroup libstrongswan
+ */
+
+/**
+ * @defgroup crypters crypters
+ *
+ * Symmetric encryption algorithms, used for
+ * encryption and decryption.
+ *
+ * @ingroup crypto
+ */
+
+/**
+ * @defgroup hashers hashers
+ *
+ * Hashing algorithms, such as MD5 or SHA1
+ *
+ * @ingroup crypto
+ */
+
+/**
+ * @defgroup prfs prfs
+ *
+ * Pseudo random functions, used to generate 
+ * pseude random byte sequences.
+ *
+ * @ingroup crypto
+ */
+
+/**
+ * @defgroup rsa rsa
+ *
+ * RSA private/public key algorithm.
+ *
+ * @ingroup crypto
+ */
+
+/**
+ * @defgroup signers signers
+ *
+ * Symmetric signing algorithms, 
+ * used to ensure message integrity.
+ *
+ * @ingroup crypto
+ */
+
+/**
+ * @defgroup utils utils
+ *
+ * Generic helper classes.
+ *
+ * @ingroup libstrongswan
+ */
+
+#include <gmp.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <printf.h>
+
+#include <enum.h>
+
+/**
+ * Number of bits in a byte
+ */
+#define BITS_PER_BYTE 8
+
+/**
+ * Default length for various auxiliary text buffers
+ */
+#define BUF_LEN 512
+
+/**
+ * Macro compares two strings for equality
+ */
+#define streq(x,y) (strcmp(x, y) == 0)
+
+/**
+ * Macro compares two binary blobs for equality
+ */
+#define memeq(x,y,len) (memcmp(x, y, len) == 0)
+
+/**
+ * Macro gives back larger of two values.
+ */
+#define max(x,y) ((x) > (y) ? (x):(y))
+
+/**
+ * Macro gives back smaller of two values.
+ */
+#define min(x,y) ((x) < (y) ? (x):(y))
+
+/**
+ * Call destructor of a object if object != NULL
+ */
+#define DESTROY_IF(obj) if (obj) obj->destroy(obj)
+
+/**
+ * Debug macro to follow control flow
+ */
+#define POS printf("%s, line %d\n", __FILE__, __LINE__)
+
+/**
+ * Macro to allocate a sized type.
+ */
+#define malloc_thing(thing) ((thing*)malloc(sizeof(thing)))
+
+/**
+ * Assign a function as a class method
+ */
+#define ASSIGN(method, function) (method = (typeof(method))function)
+
+/**
+ * time_t not defined
+ */
+#define UNDEFINED_TIME 0
+
+/**
+ * General purpose boolean type.
+ */
+typedef int bool;
+#define FALSE 0
+#define TRUE  1
+
+typedef enum status_t status_t;
+
+/**
+ * Return values of function calls.
+ */
+enum status_t {
+	/**
+	 * Call succeeded.
+	 */
+	SUCCESS,
+	
+	/**
+	 * Call failed.
+	 */
+	FAILED,
+	
+	/**
+	 * Out of resources.
+	 */
+	OUT_OF_RES,
+	
+	/**
+	 * The suggested operation is already done
+	 */
+	ALREADY_DONE,
+	
+	/**
+	 * Not supported.
+	 */
+	NOT_SUPPORTED,
+	
+	/**
+	 * One of the arguments is invalid.
+	 */
+	INVALID_ARG,
+	
+	/**
+	 * Something could not be found.
+	 */
+	NOT_FOUND,
+	
+	/**
+	 * Error while parsing.
+	 */
+	PARSE_ERROR,
+	
+	/**
+	 * Error while verifying.
+	 */
+	VERIFY_ERROR,
+	
+	/**
+	 * Object in invalid state.
+	 */
+	INVALID_STATE,
+	
+	/**
+	 * Destroy object which called method belongs to.
+	 */
+	DESTROY_ME,
+	
+	/**
+	 * Another call to the method is required.
+	 */
+	NEED_MORE,
+};
+
+/**
+ * enum_names for type status_t.
+ */
+extern enum_name_t *status_names;
+
+/**
+ * deprecated pluto style return value:
+ * error message, NULL for success
+ */
+typedef const char *err_t;
+
+/**
+ * Handle struct timeval like an own type.
+ */
+typedef struct timeval timeval_t;
+
+/**
+ * Handle struct timespec like an own type.
+ */
+typedef struct timespec timespec_t;
+
+/**
+ * Handle struct chunk_t like an own type.
+ */
+typedef struct sockaddr sockaddr_t;
+
+/**
+ * Clone a data to a newly allocated buffer
+ */
+void *clalloc(void *pointer, size_t size);
+
+/**
+ * Same as memcpy, but XORs src into dst instead of copy
+ */
+void memxor(u_int8_t dest[], u_int8_t src[], size_t n);
+
+/**
+ * Special type to count references
+ */
+typedef volatile u_int refcount_t;
+
+/**
+ * @brief Get a new reference.
+ *
+ * Increments the reference counter atomic.
+ *
+ * @param ref	pointer to ref counter
+ */
+void ref_get(refcount_t *ref);
+
+/**
+ * @brief Put back a unused reference.
+ *
+ * Decrements the reference counter atomic and 
+ * says if more references available.
+ *
+ * @param ref	pointer to ref counter
+ * @return		TRUE if no more references counted
+ */
+bool ref_put(refcount_t *ref);
+
+
+#include <chunk.h>
+#include <printf_hook.h>
+
+#endif /* LIBRARY_H_ */