Annotation of embedaddon/strongswan/src/libstrongswan/crypto/iv/iv_gen.h, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2013 Tobias Brunner
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: /**
! 17: * @defgroup iv iv
! 18: * @{ @ingroup crypto
! 19: */
! 20:
! 21: #ifndef IV_GEN_H_
! 22: #define IV_GEN_H_
! 23:
! 24: typedef struct iv_gen_t iv_gen_t;
! 25:
! 26: #include <library.h>
! 27:
! 28: /**
! 29: * Generic interface for initialization vector (IV) generators.
! 30: */
! 31: struct iv_gen_t {
! 32:
! 33: /**
! 34: * Generates an IV and writes it into the buffer.
! 35: *
! 36: * @param seq external sequence number
! 37: * @param size size of IV in bytes
! 38: * @param buffer pointer where the generated IV will be written
! 39: * @return TRUE if IV allocation was successful, FALSE otherwise
! 40: */
! 41: bool (*get_iv)(iv_gen_t *this, uint64_t seq, size_t size,
! 42: uint8_t *buffer) __attribute__((warn_unused_result));
! 43:
! 44: /**
! 45: * Generates an IV and allocates space for it.
! 46: *
! 47: * @param seq external sequence number
! 48: * @param size size of IV in bytes
! 49: * @param chunk chunk which will hold the generated IV
! 50: * @return TRUE if IV allocation was successful, FALSE otherwise
! 51: */
! 52: bool (*allocate_iv)(iv_gen_t *this, uint64_t seq, size_t size,
! 53: chunk_t *chunk) __attribute__((warn_unused_result));
! 54:
! 55: /**
! 56: * Destroys an IV generator object.
! 57: */
! 58: void (*destroy)(iv_gen_t *this);
! 59: };
! 60:
! 61: /**
! 62: * Select an IV generator for a given encryption algorithm.
! 63: *
! 64: * @param alg encryption algorithm
! 65: * @return IV generator
! 66: */
! 67: iv_gen_t* iv_gen_create_for_alg(encryption_algorithm_t alg);
! 68:
! 69: #endif /** IV_GEN_H_ @}*/
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