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#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "crypto_stream_salsa20.h"
#include "private/common.h"
#include "private/sse2_64_32.h"
#include "utils.h"
#if defined(HAVE_AVX2INTRIN_H) && defined(HAVE_EMMINTRIN_H) && \
defined(HAVE_TMMINTRIN_H) && defined(HAVE_SMMINTRIN_H)
# ifdef __GNUC__
# pragma GCC target("sse2")
# pragma GCC target("ssse3")
# pragma GCC target("sse4.1")
# pragma GCC target("avx2")
# endif
#include <emmintrin.h>
#include <immintrin.h>
#include <smmintrin.h>
#include <tmmintrin.h>
# include "../stream_salsa20.h"
# include "salsa20_xmm6int-avx2.h"
# define ROUNDS 20
typedef struct salsa_ctx {
uint32_t input[16];
} salsa_ctx;
static const int TR[16] = {
0, 5, 10, 15, 12, 1, 6, 11, 8, 13, 2, 7, 4, 9, 14, 3
};
static void
salsa_keysetup(salsa_ctx *ctx, const uint8_t *k)
{
ctx->input[TR[1]] = LOAD32_LE(k + 0);
ctx->input[TR[2]] = LOAD32_LE(k + 4);
ctx->input[TR[3]] = LOAD32_LE(k + 8);
ctx->input[TR[4]] = LOAD32_LE(k + 12);
ctx->input[TR[11]] = LOAD32_LE(k + 16);
ctx->input[TR[12]] = LOAD32_LE(k + 20);
ctx->input[TR[13]] = LOAD32_LE(k + 24);
ctx->input[TR[14]] = LOAD32_LE(k + 28);
ctx->input[TR[0]] = 0x61707865;
ctx->input[TR[5]] = 0x3320646e;
ctx->input[TR[10]] = 0x79622d32;
ctx->input[TR[15]] = 0x6b206574;
}
static void
salsa_ivsetup(salsa_ctx *ctx, const uint8_t *iv, const uint8_t *counter)
{
ctx->input[TR[6]] = LOAD32_LE(iv + 0);
ctx->input[TR[7]] = LOAD32_LE(iv + 4);
ctx->input[TR[8]] = counter == NULL ? 0 : LOAD32_LE(counter + 0);
ctx->input[TR[9]] = counter == NULL ? 0 : LOAD32_LE(counter + 4);
}
static void
salsa20_encrypt_bytes(salsa_ctx *ctx, const uint8_t *m, uint8_t *c,
unsigned long long bytes)
{
uint32_t * const x = &ctx->input[0];
if (!bytes) {
return; /* LCOV_EXCL_LINE */
}
#include "u8.h"
#include "u4.h"
#include "u1.h"
#include "u0.h"
}
static int
stream_avx2(unsigned char *c, unsigned long long clen, const unsigned char *n,
const unsigned char *k)
{
struct salsa_ctx ctx;
if (!clen) {
return 0;
}
COMPILER_ASSERT(crypto_stream_salsa20_KEYBYTES == 256 / 8);
salsa_keysetup(&ctx, k);
salsa_ivsetup(&ctx, n, NULL);
memset(c, 0, clen);
salsa20_encrypt_bytes(&ctx, c, c, clen);
sodium_memzero(&ctx, sizeof ctx);
return 0;
}
static int
stream_avx2_xor_ic(unsigned char *c, const unsigned char *m,
unsigned long long mlen, const unsigned char *n, uint64_t ic,
const unsigned char *k)
{
struct salsa_ctx ctx;
uint8_t ic_bytes[8];
uint32_t ic_high;
uint32_t ic_low;
if (!mlen) {
return 0;
}
ic_high = (uint32_t) (ic >> 32);
ic_low = (uint32_t) ic;
STORE32_LE(&ic_bytes[0], ic_low);
STORE32_LE(&ic_bytes[4], ic_high);
salsa_keysetup(&ctx, k);
salsa_ivsetup(&ctx, n, ic_bytes);
salsa20_encrypt_bytes(&ctx, m, c, mlen);
sodium_memzero(&ctx, sizeof ctx);
return 0;
}
struct crypto_stream_salsa20_implementation
crypto_stream_salsa20_xmm6int_avx2_implementation = {
SODIUM_C99(.stream =) stream_avx2,
SODIUM_C99(.stream_xor_ic =) stream_avx2_xor_ic
};
#endif
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