88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* cfb.h
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Cipher feedback mode.
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Copyright (C) 2015, 2017 Dmitry Eremin-Solenikov
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Copyright (C) 2001 Niels Möller
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#ifndef NETTLE_CFB_H_INCLUDED
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#define NETTLE_CFB_H_INCLUDED
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#include "nettle-types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Name mangling */
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#define cfb_encrypt nettle_cfb_encrypt
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#define cfb_decrypt nettle_cfb_decrypt
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void
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cfb_encrypt(const void *ctx, nettle_cipher_func *f,
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size_t block_size, uint8_t *iv,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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void
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cfb_decrypt(const void *ctx, nettle_cipher_func *f,
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size_t block_size, uint8_t *iv,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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#define CFB_CTX(type, size) \
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{ type ctx; uint8_t iv[size]; }
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#define CFB_SET_IV(ctx, data) \
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memcpy((ctx)->iv, (data), sizeof((ctx)->iv))
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/* NOTE: Avoid using NULL, as we don't include anything defining it. */
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#define CFB_ENCRYPT(self, f, length, dst, src) \
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(0 ? ((f)(&(self)->ctx, ~(size_t) 0, \
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(uint8_t *) 0, (const uint8_t *) 0)) \
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: cfb_encrypt((void *) &(self)->ctx, \
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(nettle_cipher_func *) (f), \
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sizeof((self)->iv), (self)->iv, \
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(length), (dst), (src)))
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#define CFB_DECRYPT(self, f, length, dst, src) \
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(0 ? ((f)(&(self)->ctx, ~(size_t) 0, \
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(uint8_t *) 0, (const uint8_t *) 0)) \
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: cfb_decrypt((void *) &(self)->ctx, \
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(nettle_cipher_func *) (f), \
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sizeof((self)->iv), (self)->iv, \
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(length), (dst), (src)))
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETTLE_CFB_H_INCLUDED */
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