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60 lines
1.2 KiB
60 lines
1.2 KiB
// cipher SPECK -- 128 bit block size -- 256 bit key size
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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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#ifdef __APPLE__
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#include <libkern/OSByteOrder.h>
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#define htole64(x) OSSwapHostToLittleInt64(x)
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#endif
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#define u64 uint64_t
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#if defined (__AVX2__)
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#define SPECK_ALIGNED_CTX 32
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#include <immintrin.h>
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#define u256 __m256i
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typedef struct {
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u256 rk[34];
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u64 key[34];
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} speck_context_t;
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#elif defined (__SSE4_2__)
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#define SPECK_ALIGNED_CTX 16
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#define SPECK_CTX_BYVAL 1
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#include <immintrin.h>
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#define u128 __m128i
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typedef struct {
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u128 rk[34];
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u64 key[34];
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} speck_context_t;
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#elif defined (__ARM_NEON)
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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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} speck_context_t;
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#else
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typedef struct {
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u64 key[34];
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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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#if defined (SPECK_CTX_BYVAL)
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speck_context_t ctx);
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#else
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speck_context_t *ctx);
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#endif
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int speck_expand_key (const unsigned char *k, speck_context_t *ctx);
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