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