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/*
* cifra - embedded cryptography library * Written in 2014 by Joseph Birr-Pixton <jpixton@gmail.com> * * To the extent possible under law, the author(s) have dedicated all * copyright and related and neighboring rights to this software to the * public domain worldwide. This software is distributed without any * warranty. * * You should have received a copy of the CC0 Public Domain Dedication * along with this software. If not, see * <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#ifndef PRP_H
#define PRP_H
#include <stddef.h>
#include <stdint.h>
/**
* General block cipher description * ================================ * This allows us to implement block cipher modes which can work * with different block ciphers. */
/* .. c:type:: cf_prp_block
* Block processing function type. * * The `in` and `out` blocks may alias. * * :rtype: void * :param ctx: block cipher-specific context object. * :param in: input block. * :param out: output block. */typedef void (*cf_prp_block)(void *ctx, const uint8_t *in, uint8_t *out);
/* .. c:type:: cf_prp
* Describes an PRP in a general way. * * .. c:member:: cf_prp.blocksz * Block size in bytes. Must be no more than :c:macro:`CF_MAXBLOCK`. * * .. c:member:: cf_prp.encrypt * Block encryption function. * * .. c:member:: cf_prp.decrypt * Block decryption function. */typedef struct{ size_t blocksz; cf_prp_block encrypt; cf_prp_block decrypt;} cf_prp;
/* .. c:macro:: CF_MAXBLOCK
* The maximum block cipher blocksize we support, in bytes. */#define CF_MAXBLOCK 16
#endif
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