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103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/**
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Copyright © 2015 Odzhan
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Copyright © 2008 Daniel Otte
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All Rights Reserved.
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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 are
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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 products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY AUTHORS "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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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,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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#ifndef SERPENT_H
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#define SERPENT_H
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#include <stdint.h>
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#ifdef INTRINSICS
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#define memcpy(x,y,z) __movsb(x,y,z)
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#define memmove(x,y,z) __movsb(x,y,z)
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#define memset(x,y,z) __stosb(x,y,z)
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#define ROTL32(x,r) _rotl(x,r)
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#define ROTR32(x,r) _rotr(x,r)
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#else
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#define U8V(v) ((uint8_t)(v) & 0xFFU)
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#define U16V(v) ((uint16_t)(v) & 0xFFFFU)
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#define U32V(v) ((uint32_t)(v) & 0xFFFFFFFFUL)
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#define U64V(v) ((uint64_t)(v) & 0xFFFFFFFFFFFFFFFFULL)
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#define ROTL8(v, n) \
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(U8V((v) << (n)) | ((v) >> (8 - (n))))
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#define ROTL16(v, n) \
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(U16V((v) << (n)) | ((v) >> (16 - (n))))
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#define ROTL32(v, n) \
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(U32V((v) << (n)) | ((v) >> (32 - (n))))
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#define ROTL64(v, n) \
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(U64V((v) << (n)) | ((v) >> (64 - (n))))
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#define ROTR8(v, n) ROTL8(v, 8 - (n))
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#define ROTR16(v, n) ROTL16(v, 16 - (n))
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#define ROTR32(v, n) ROTL32(v, 32 - (n))
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#define ROTR64(v, n) ROTL64(v, 64 - (n))
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#endif
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#define GOLDEN_RATIO 0x9e3779b9l
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#define SERPENT_ROUNDS 32
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#define SERPENT_BLK_LEN 16
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#define SERPENT_KEY256 32
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#define SERPENT_ENCRYPT 0
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#define SERPENT_DECRYPT 1
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#define SERPENT_IP 0
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#define SERPENT_FP 1
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typedef union _serpent_blk_t {
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uint8_t b[SERPENT_BLK_LEN];
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uint32_t w[SERPENT_BLK_LEN / 4];
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uint64_t q[SERPENT_BLK_LEN / 2];
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} serpent_blk;
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typedef uint32_t serpent_subkey_t[4];
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typedef struct {
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serpent_subkey_t x[SERPENT_ROUNDS + 1];
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} serpent_key_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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// C code
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void serpent_set_encrypt_key(serpent_key_t *key, const unsigned char *user_key);
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void serpent_encrypt(void *in, serpent_key_t *key);
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void serpent_decrypt(void *in, serpent_key_t *key);
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#ifdef __cplusplus
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}
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#endif
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#endif
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