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70 lines
2.8 KiB
C
70 lines
2.8 KiB
C
/*-
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* Copyright (c) 2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef CRYB_CIPHER_H_INCLUDED
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#define CRYB_CIPHER_H_INCLUDED
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#define cipher_ctx cryb_cipher_ctx
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#define cipher_init_func cryb_cipher_init_func
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#define cipher_update_func cryb_cipher_update_func
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#define cipher_finish_func cryb_cipher_finish_func
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#define cipher_algorithm cryb_cipher_algorithm
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typedef enum {
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CIPHER_MODE_ENCRYPT = 0,
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CIPHER_MODE_DECRYPT = 1,
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} cipher_mode;
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typedef void cipher_ctx;
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typedef void (*cipher_init_func)(cipher_ctx *, cipher_mode, const uint8_t *, size_t);
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typedef void (*cipher_update_func)(cipher_ctx *, const void *, size_t, void *);
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typedef void (*cipher_finish_func)(cipher_ctx *);
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typedef struct {
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const char *name; /* algorithm name */
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size_t contextlen; /* size of context structure */
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size_t blocklen; /* block length */
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size_t keylen; /* key length */
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cipher_init_func init; /* initialization method */
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cipher_update_func update; /* {enc,dec}ryption method */
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cipher_finish_func finish; /* finalization method */
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} cipher_algorithm;
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#define get_cipher_algorithm cryb_get_cipher_algorithm
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const cipher_algorithm *get_cipher_algorithm(const char *);
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#define cipher_init(alg, ctx, mode, key, keylen) \
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(alg)->init((ctx), (mode), (key), (keylen))
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#define cipher_update(alg, ctx, in, len, out) \
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(alg)->update((ctx), (in), (len), (out))
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#define cipher_finish(alg, ctx) \
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(alg)->finish((ctx))
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#endif
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