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Annotation of embedaddon/strongswan/src/libstrongswan/crypto/prf_plus.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2005-2006 Martin Willi
        !             3:  * Copyright (C) 2005 Jan Hutter
        !             4:  * HSR Hochschule fuer Technik Rapperswil
        !             5:  *
        !             6:  * This program is free software; you can redistribute it and/or modify it
        !             7:  * under the terms of the GNU General Public License as published by the
        !             8:  * Free Software Foundation; either version 2 of the License, or (at your
        !             9:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
        !            10:  *
        !            11:  * This program is distributed in the hope that it will be useful, but
        !            12:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            13:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
        !            14:  * for more details.
        !            15:  */
        !            16: 
        !            17: /**
        !            18:  * @defgroup prf_plus prf_plus
        !            19:  * @{ @ingroup crypto
        !            20:  */
        !            21: 
        !            22: #ifndef PRF_PLUS_H_
        !            23: #define PRF_PLUS_H_
        !            24: 
        !            25: typedef struct prf_plus_t prf_plus_t;
        !            26: 
        !            27: #include <crypto/prfs/prf.h>
        !            28: 
        !            29: /**
        !            30:  * Implementation of the prf+ function used in IKEv1/IKEv2 keymat extension.
        !            31:  */
        !            32: struct prf_plus_t {
        !            33: 
        !            34:        /**
        !            35:         * Get pseudo random bytes.
        !            36:         *
        !            37:         * @param length        number of bytes to get
        !            38:         * @param buffer        pointer where the generated bytes will be written
        !            39:         * @return                      TRUE if bytes generated successfully
        !            40:         */
        !            41:        bool (*get_bytes)(prf_plus_t *this, size_t length,
        !            42:                                          uint8_t *buffer) __attribute__((warn_unused_result));
        !            43: 
        !            44:        /**
        !            45:         * Allocate pseudo random bytes.
        !            46:         *
        !            47:         * @param length        number of bytes to get
        !            48:         * @param chunk         chunk which will hold generated bytes
        !            49:         * @return                      TRUE if bytes allocated successfully
        !            50:         */
        !            51:        bool (*allocate_bytes)(prf_plus_t *this, size_t length,
        !            52:                                                   chunk_t *chunk) __attribute__((warn_unused_result));
        !            53: 
        !            54:        /**
        !            55:         * Destroys a prf_plus_t object.
        !            56:         */
        !            57:        void (*destroy)(prf_plus_t *this);
        !            58: };
        !            59: 
        !            60: /**
        !            61:  * Creates a new prf_plus_t object.
        !            62:  *
        !            63:  * @param prf                          prf object to use, must be destroyed after prf+.
        !            64:  * @param counter                      use an appending counter byte (for IKEv2 variant)
        !            65:  * @param seed                         input seed for prf
        !            66:  * @return                                     prf_plus_t object, NULL on failure
        !            67:  */
        !            68: prf_plus_t *prf_plus_create(prf_t *prf, bool counter, chunk_t seed);
        !            69: 
        !            70: #endif /** PRF_PLUS_H_ @}*/