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140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/**
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* (C) 2007-22 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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// cipher SPECK -- 128 bit block size -- 128 and 256 bit key size -- CTR mode
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// taken from (and modified: removed pure crypto-stream generation and seperated key expansion)
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// https://github.com/nsacyber/simon-speck-supercop/blob/master/crypto_stream/speck128256ctr/
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#ifndef SPECK_H
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#define SPECK_H
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#include <stdint.h> // for uint64_t, uint32_t
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#define u32 uint32_t
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#define u64 uint64_t
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#define N2N_SPECK_IVEC_SIZE 16
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#define SPECK_KEY_BYTES (256/8)
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#if defined (__AVX512F__) // AVX512 support -----------------------------------------------------------------------
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#include <immintrin.h>
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#include <string.h> /* memcpy() */
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#define u512 __m512i
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#define SPECK_ALIGNED_CTX 64
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typedef struct {
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u512 rk[34];
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u64 key[34];
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u32 keysize;
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} speck_context_t;
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#elif defined (__AVX2__) // AVX2 support --------------------------------------------------------------------------
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#include <immintrin.h>
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#define u256 __m256i
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#define SPECK_ALIGNED_CTX 32
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typedef struct {
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u256 rk[34];
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u64 key[34];
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u32 keysize;
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} speck_context_t;
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#elif defined (__SSE2__) // SSE support ---------------------------------------------------------------------------
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#include <immintrin.h>
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#define u128 __m128i
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#define SPECK_ALIGNED_CTX 16
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#define SPECK_CTX_BYVAL 1
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typedef struct {
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u128 rk[34];
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u64 key[34];
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u32 keysize;
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} speck_context_t;
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#elif defined (__ARM_NEON) && defined (SPECK_ARM_NEON) // NEON support ---------------------------------------
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#include <arm_neon.h>
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#define u128 uint64x2_t
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typedef struct {
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u128 rk[34];
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u64 key[34];
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u32 keysize;
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} speck_context_t;
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#else // plain C --------------------------------------------------------------------------------------------------
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typedef struct {
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u64 key[34];
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u32 keysize;
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} speck_context_t;
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#endif // ---------------------------------------------------------------------------------------------------------
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int speck_ctr (unsigned char *out, const unsigned char *in, unsigned long long inlen,
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const unsigned char *n,
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speck_context_t *ctx);
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int speck_init (speck_context_t **ctx, const unsigned char *k, int keysize);
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int speck_deinit (speck_context_t *ctx);
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// ----------------------------------------------------------------------------------------------------------------
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// ----------------------------------------------------------------------------------------------------------------
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// cipher SPECK -- 128 bit block size -- 128 bit key size -- ECB mode
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// follows endianess rules as used in official implementation guide and NOT as in original 2013 cipher presentation
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// used for IV in header encryption (one block) and challenge encryption (user/password)
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// for now: just plain C -- probably no need for AVX, SSE, NEON
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int speck_128_decrypt (unsigned char *inout, speck_context_t *ctx);
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int speck_128_encrypt (unsigned char *inout, speck_context_t *ctx);
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#endif // SPECK_H
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