87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* cast128.h
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The CAST-128 block cipher.
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Copyright (C) 2001, 2014 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_CAST128_H_INCLUDED
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#define NETTLE_CAST128_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 cast5_set_key nettle_cast5_set_key
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#define cast128_set_key nettle_cast128_set_key
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#define cast128_encrypt nettle_cast128_encrypt
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#define cast128_decrypt nettle_cast128_decrypt
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#define CAST128_BLOCK_SIZE 8
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/* Variable key size between 40 and 128. */
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#define CAST5_MIN_KEY_SIZE 5
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#define CAST5_MAX_KEY_SIZE 16
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#define CAST128_KEY_SIZE 16
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struct cast128_ctx
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{
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unsigned rounds; /* Number of rounds to use, 12 or 16 */
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/* Expanded key, rotations (5 bits only) and 32-bit masks. */
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unsigned char Kr[16];
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uint32_t Km[16];
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};
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/* Using variable key size. */
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void
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cast5_set_key(struct cast128_ctx *ctx,
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size_t length, const uint8_t *key);
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void
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cast128_set_key(struct cast128_ctx *ctx, const uint8_t *key);
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void
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cast128_encrypt(const struct cast128_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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cast128_decrypt(const struct cast128_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_CAST128_H_INCLUDED */
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