90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
/* blowfish.h
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Blowfish block cipher.
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Copyright (C) 2014 Niels Möller
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Copyright (C) 1998, 2001 FSF, Ray Dassen, 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_BLOWFISH_H_INCLUDED
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#define NETTLE_BLOWFISH_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 blowfish_set_key nettle_blowfish_set_key
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#define blowfish128_set_key nettle_blowfish128_set_key
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#define blowfish_encrypt nettle_blowfish_encrypt
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#define blowfish_decrypt nettle_blowfish_decrypt
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#define BLOWFISH_BLOCK_SIZE 8
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/* Variable key size between 64 and 448 bits. */
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#define BLOWFISH_MIN_KEY_SIZE 8
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#define BLOWFISH_MAX_KEY_SIZE 56
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/* Default to 128 bits */
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#define BLOWFISH_KEY_SIZE 16
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#define BLOWFISH128_KEY_SIZE 16
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#define _BLOWFISH_ROUNDS 16
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struct blowfish_ctx
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{
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uint32_t s[4][256];
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uint32_t p[_BLOWFISH_ROUNDS+2];
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};
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/* Returns 0 for weak keys, otherwise 1. */
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int
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blowfish_set_key(struct blowfish_ctx *ctx,
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size_t length, const uint8_t *key);
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int
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blowfish128_set_key(struct blowfish_ctx *ctx, const uint8_t *key);
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void
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blowfish_encrypt(const struct blowfish_ctx *ctx,
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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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blowfish_decrypt(const struct blowfish_ctx *ctx,
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size_t length, uint8_t *dst,
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const uint8_t *src);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETTLE_BLOWFISH_H_INCLUDED */
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