72 lines
2.2 KiB
C
Executable File
72 lines
2.2 KiB
C
Executable File
/* arctwo.h --- The arctwo block cipher
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* Copyright (C) 2000-2003, 2005, 2009-2024 Free Software Foundation, Inc.
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*
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* This file is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This file 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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */
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#ifndef ARCTWO_H
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#define ARCTWO_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct
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{
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uint16_t S[64];
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} arctwo_context;
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#define ARCTWO_BLOCK_SIZE 8
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/* Initialize CONTEXT using KEY of KEYLEN length. If
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EFFECTIVE_KEYLEN, truncate the key (using a special algorithm) to
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only be of EFFECTIVE_KEYLEN bits. Normally, you use
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EFFECTIVE_KEYLEN of 0, but see RFC 2268 for more information. */
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void
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arctwo_setkey_ekb (arctwo_context *context,
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size_t keylen, const char *key, size_t effective_keylen);
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#define arctwo_setkey(context,keylen,key) \
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arctwo_setkey_ekb (context, keylen, key, 8 * (keylen))
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/* Encrypt INBUF of size LENGTH into OUTBUF. LENGTH must be a
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multiple of ARCTWO_BLOCK_SIZE. CONTEXT hold the encryption key,
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and must have been initialized with arctwo_setkey or
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arctwo_setkey_ekb. */
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extern void
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arctwo_encrypt (arctwo_context *context, const char *inbuf,
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char *restrict outbuf, size_t length);
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/* Decrypt INBUF of size LENGTH into OUTBUF. LENGTH must be a
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multiple of ARCTWO_BLOCK_SIZE. CONTEXT hold the decryption key,
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and must have been initialized with arctwo_setkey or
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arctwo_setkey_ekb. */
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extern void
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arctwo_decrypt (arctwo_context *context, const char *inbuf,
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char *restrict outbuf, size_t length);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ARCTWO_H */
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