typedef struct
{
/* pre-calculated hash key values */
- const __m128i Hi[8];
+ const u8x16 Hi[8];
/* extracted AES key */
- const __m128i Ke[15];
+ const u8x16 Ke[15];
} aes_gcm_key_data_t;
-static const __m128i last_byte_one = { 0, 1ULL << 56 };
-static const __m128i zero = { 0, 0 };
+static const u32x4 last_byte_one = { 0, 0, 0, 1 << 24 };
static const u8x16 bswap_mask = {
15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
};
-static const u8x16 byte_mask_scale = {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
-};
-
-static_always_inline __m128i
-aesni_gcm_bswap (__m128i x)
-{
- return _mm_shuffle_epi8 (x, (__m128i) bswap_mask);
-}
-
-static_always_inline __m128i
-aesni_gcm_byte_mask (__m128i x, u8 n_bytes)
-{
- u8x16 mask = u8x16_is_greater (u8x16_splat (n_bytes), byte_mask_scale);
-
- return _mm_blendv_epi8 (zero, x, (__m128i) mask);
-}
-
-static_always_inline __m128i
-aesni_gcm_load_partial (__m128i * p, int n_bytes)
-{
- ASSERT (n_bytes <= 16);
-#ifdef __AVX512F__
- return _mm_mask_loadu_epi8 (zero, (1 << n_bytes) - 1, p);
-#else
- return aesni_gcm_byte_mask (CLIB_MEM_OVERFLOW_LOAD (_mm_loadu_si128, p),
- n_bytes);
-#endif
-}
-
-static_always_inline void
-aesni_gcm_store_partial (void *p, __m128i r, int n_bytes)
+static_always_inline u8x16
+aesni_gcm_bswap (u8x16 x)
{
-#ifdef __AVX512F__
- _mm_mask_storeu_epi8 (p, (1 << n_bytes) - 1, r);
-#else
- u8x16 mask = u8x16_is_greater (u8x16_splat (n_bytes), byte_mask_scale);
- _mm_maskmoveu_si128 (r, (__m128i) mask, p);
-#endif
+ return (u8x16) _mm_shuffle_epi8 ((__m128i) x, (__m128i) bswap_mask);
}
static_always_inline void
-aesni_gcm_load (__m128i * d, __m128i * inv, int n, int n_bytes)
+aesni_gcm_load (u8x16 * d, u8x16u * inv, int n, int n_bytes)
{
for (int i = 0; i < n - 1; i++)
- d[i] = _mm_loadu_si128 (inv + i);
- d[n - 1] = n_bytes ? aesni_gcm_load_partial (inv + n - 1, n_bytes) :
- _mm_loadu_si128 (inv + n - 1);
+ d[i] = inv[i];
+ d[n - 1] = n_bytes ? aes_load_partial (inv + n - 1, n_bytes) : inv[n - 1];
}
static_always_inline void
-aesni_gcm_store (__m128i * d, __m128i * outv, int n, int n_bytes)
+aesni_gcm_store (u8x16 * d, u8x16u * outv, int n, int n_bytes)
{
for (int i = 0; i < n - 1; i++)
- _mm_storeu_si128 (outv + i, d[i]);
+ outv[i] = d[i];
if (n_bytes & 0xf)
- aesni_gcm_store_partial (outv + n - 1, d[n - 1], n_bytes);
+ aes_store_partial (outv + n - 1, d[n - 1], n_bytes);
else
- _mm_storeu_si128 (outv + n - 1, d[n - 1]);
+ outv[n - 1] = d[n - 1];
}
static_always_inline void
-aesni_gcm_enc_first_round (__m128i * r, __m128i * Y, u32 * ctr, __m128i k,
+aesni_gcm_enc_first_round (u8x16 * r, u32x4 * Y, u32 * ctr, u8x16 k,
int n_blocks)
{
- u32 i;
-
if (PREDICT_TRUE ((u8) ctr[0] < (256 - n_blocks)))
{
- for (i = 0; i < n_blocks; i++)
+ for (int i = 0; i < n_blocks; i++)
{
- Y[0] = _mm_add_epi32 (Y[0], last_byte_one);
- r[i] = k ^ Y[0];
+ Y[0] += last_byte_one;
+ r[i] = k ^ (u8x16) Y[0];
}
ctr[0] += n_blocks;
}
else
{
- for (i = 0; i < n_blocks; i++)
+ for (int i = 0; i < n_blocks; i++)
{
- Y[0] = _mm_insert_epi32 (Y[0], clib_host_to_net_u32 (++ctr[0]), 3);
- r[i] = k ^ Y[0];
+ Y[0][3] = clib_host_to_net_u32 (++ctr[0]);
+ r[i] = k ^ (u8x16) Y[0];
}
}
}
static_always_inline void
-aesni_gcm_enc_round (__m128i * r, __m128i k, int n_blocks)
+aesni_gcm_enc_round (u8x16 * r, u8x16 k, int n_blocks)
{
for (int i = 0; i < n_blocks; i++)
- r[i] = _mm_aesenc_si128 (r[i], k);
+ r[i] = aes_enc_round (r[i], k);
}
static_always_inline void
-aesni_gcm_enc_last_round (__m128i * r, __m128i * d, const __m128i * k,
+aesni_gcm_enc_last_round (u8x16 * r, u8x16 * d, u8x16 const *k,
int rounds, int n_blocks)
{
aesni_gcm_enc_round (r, k[i], n_blocks);
for (int i = 0; i < n_blocks; i++)
- d[i] ^= _mm_aesenclast_si128 (r[i], k[rounds]);
+ d[i] ^= aes_enc_last_round (r[i], k[rounds]);
}
-static_always_inline __m128i
-aesni_gcm_ghash_blocks (__m128i T, aes_gcm_key_data_t * kd,
- const __m128i * in, int n_blocks)
+static_always_inline u8x16
+aesni_gcm_ghash_blocks (u8x16 T, aes_gcm_key_data_t * kd,
+ u8x16u * in, int n_blocks)
{
ghash_data_t _gd, *gd = &_gd;
- const __m128i *Hi = kd->Hi + n_blocks - 1;
- ghash_mul_first (gd, aesni_gcm_bswap (_mm_loadu_si128 (in)) ^ T, Hi[0]);
+ const u8x16 *Hi = kd->Hi + n_blocks - 1;
+ ghash_mul_first (gd, aesni_gcm_bswap (in[0]) ^ T, Hi[0]);
for (int i = 1; i < n_blocks; i++)
- ghash_mul_next (gd, aesni_gcm_bswap (_mm_loadu_si128 (in + i)), Hi[-i]);
+ ghash_mul_next (gd, aesni_gcm_bswap ((in[i])), Hi[-i]);
ghash_reduce (gd);
ghash_reduce2 (gd);
return ghash_final (gd);
}
-static_always_inline __m128i
-aesni_gcm_ghash (__m128i T, aes_gcm_key_data_t * kd, const __m128i * in,
- u32 n_left)
+static_always_inline u8x16
+aesni_gcm_ghash (u8x16 T, aes_gcm_key_data_t * kd, u8x16u * in, u32 n_left)
{
while (n_left >= 128)
if (n_left)
{
- __m128i r = aesni_gcm_load_partial ((__m128i *) in, n_left);
+ u8x16 r = aes_load_partial (in, n_left);
T = ghash_mul (aesni_gcm_bswap (r) ^ T, kd->Hi[0]);
}
return T;
}
-static_always_inline __m128i
-aesni_gcm_calc (__m128i T, aes_gcm_key_data_t * kd, __m128i * d,
- __m128i * Y, u32 * ctr, __m128i * inv, __m128i * outv,
+static_always_inline u8x16
+aesni_gcm_calc (u8x16 T, aes_gcm_key_data_t * kd, u8x16 * d,
+ u32x4 * Y, u32 * ctr, u8x16u * inv, u8x16u * outv,
int rounds, int n, int last_block_bytes, int with_ghash,
int is_encrypt)
{
- __m128i r[n];
+ u8x16 r[n];
ghash_data_t _gd = { }, *gd = &_gd;
- const __m128i *k = kd->Ke;
+ const u8x16 *rk = (u8x16 *) kd->Ke;
int hidx = is_encrypt ? 4 : n, didx = 0;
_mm_prefetch (inv + 4, _MM_HINT_T0);
/* AES rounds 0 and 1 */
- aesni_gcm_enc_first_round (r, Y, ctr, k[0], n);
- aesni_gcm_enc_round (r, k[1], n);
+ aesni_gcm_enc_first_round (r, Y, ctr, rk[0], n);
+ aesni_gcm_enc_round (r, rk[1], n);
/* load data - decrypt round */
if (is_encrypt == 0)
ghash_mul_first (gd, aesni_gcm_bswap (d[didx++]) ^ T, kd->Hi[--hidx]);
/* AES rounds 2 and 3 */
- aesni_gcm_enc_round (r, k[2], n);
- aesni_gcm_enc_round (r, k[3], n);
+ aesni_gcm_enc_round (r, rk[2], n);
+ aesni_gcm_enc_round (r, rk[3], n);
/* GHASH multiply block 2 */
if (with_ghash && hidx)
ghash_mul_next (gd, aesni_gcm_bswap (d[didx++]), kd->Hi[--hidx]);
/* AES rounds 4 and 5 */
- aesni_gcm_enc_round (r, k[4], n);
- aesni_gcm_enc_round (r, k[5], n);
+ aesni_gcm_enc_round (r, rk[4], n);
+ aesni_gcm_enc_round (r, rk[5], n);
/* GHASH multiply block 3 */
if (with_ghash && hidx)
ghash_mul_next (gd, aesni_gcm_bswap (d[didx++]), kd->Hi[--hidx]);
/* AES rounds 6 and 7 */
- aesni_gcm_enc_round (r, k[6], n);
- aesni_gcm_enc_round (r, k[7], n);
+ aesni_gcm_enc_round (r, rk[6], n);
+ aesni_gcm_enc_round (r, rk[7], n);
/* GHASH multiply block 4 */
if (with_ghash && hidx)
ghash_mul_next (gd, aesni_gcm_bswap (d[didx++]), kd->Hi[--hidx]);
/* AES rounds 8 and 9 */
- aesni_gcm_enc_round (r, k[8], n);
- aesni_gcm_enc_round (r, k[9], n);
+ aesni_gcm_enc_round (r, rk[8], n);
+ aesni_gcm_enc_round (r, rk[9], n);
/* GHASH reduce 1st step */
if (with_ghash)
ghash_reduce2 (gd);
/* AES last round(s) */
- aesni_gcm_enc_last_round (r, d, k, rounds, n);
+ aesni_gcm_enc_last_round (r, d, rk, rounds, n);
/* store data */
aesni_gcm_store (d, outv, n, last_block_bytes);
return T;
}
-static_always_inline __m128i
-aesni_gcm_calc_double (__m128i T, aes_gcm_key_data_t * kd, __m128i * d,
- __m128i * Y, u32 * ctr, __m128i * inv, __m128i * outv,
+static_always_inline u8x16
+aesni_gcm_calc_double (u8x16 T, aes_gcm_key_data_t * kd, u8x16 * d,
+ u32x4 * Y, u32 * ctr, u8x16u * inv, u8x16u * outv,
int rounds, int is_encrypt)
{
- __m128i r[4];
+ u8x16 r[4];
ghash_data_t _gd, *gd = &_gd;
- const __m128i *k = kd->Ke;
+ const u8x16 *rk = (u8x16 *) kd->Ke;
/* AES rounds 0 and 1 */
- aesni_gcm_enc_first_round (r, Y, ctr, k[0], 4);
- aesni_gcm_enc_round (r, k[1], 4);
+ aesni_gcm_enc_first_round (r, Y, ctr, rk[0], 4);
+ aesni_gcm_enc_round (r, rk[1], 4);
/* load 4 blocks of data - decrypt round */
if (is_encrypt == 0)
ghash_mul_first (gd, aesni_gcm_bswap (d[0]) ^ T, kd->Hi[7]);
/* AES rounds 2 and 3 */
- aesni_gcm_enc_round (r, k[2], 4);
- aesni_gcm_enc_round (r, k[3], 4);
+ aesni_gcm_enc_round (r, rk[2], 4);
+ aesni_gcm_enc_round (r, rk[3], 4);
/* GHASH multiply block 1 */
ghash_mul_next (gd, aesni_gcm_bswap (d[1]), kd->Hi[6]);
/* AES rounds 4 and 5 */
- aesni_gcm_enc_round (r, k[4], 4);
- aesni_gcm_enc_round (r, k[5], 4);
+ aesni_gcm_enc_round (r, rk[4], 4);
+ aesni_gcm_enc_round (r, rk[5], 4);
/* GHASH multiply block 2 */
ghash_mul_next (gd, aesni_gcm_bswap (d[2]), kd->Hi[5]);
/* AES rounds 6 and 7 */
- aesni_gcm_enc_round (r, k[6], 4);
- aesni_gcm_enc_round (r, k[7], 4);
+ aesni_gcm_enc_round (r, rk[6], 4);
+ aesni_gcm_enc_round (r, rk[7], 4);
/* GHASH multiply block 3 */
ghash_mul_next (gd, aesni_gcm_bswap (d[3]), kd->Hi[4]);
/* AES rounds 8 and 9 */
- aesni_gcm_enc_round (r, k[8], 4);
- aesni_gcm_enc_round (r, k[9], 4);
+ aesni_gcm_enc_round (r, rk[8], 4);
+ aesni_gcm_enc_round (r, rk[9], 4);
/* load 4 blocks of data - encrypt round */
if (is_encrypt)
aesni_gcm_load (d, inv, 4, 0);
/* AES last round(s) */
- aesni_gcm_enc_last_round (r, d, k, rounds, 4);
+ aesni_gcm_enc_last_round (r, d, rk, rounds, 4);
/* store 4 blocks of data */
aesni_gcm_store (d, outv, 4, 0);
ghash_mul_next (gd, aesni_gcm_bswap (d[0]), kd->Hi[3]);
/* AES rounds 0, 1 and 2 */
- aesni_gcm_enc_first_round (r, Y, ctr, k[0], 4);
- aesni_gcm_enc_round (r, k[1], 4);
- aesni_gcm_enc_round (r, k[2], 4);
+ aesni_gcm_enc_first_round (r, Y, ctr, rk[0], 4);
+ aesni_gcm_enc_round (r, rk[1], 4);
+ aesni_gcm_enc_round (r, rk[2], 4);
/* GHASH multiply block 5 */
ghash_mul_next (gd, aesni_gcm_bswap (d[1]), kd->Hi[2]);
/* AES rounds 3 and 4 */
- aesni_gcm_enc_round (r, k[3], 4);
- aesni_gcm_enc_round (r, k[4], 4);
+ aesni_gcm_enc_round (r, rk[3], 4);
+ aesni_gcm_enc_round (r, rk[4], 4);
/* GHASH multiply block 6 */
ghash_mul_next (gd, aesni_gcm_bswap (d[2]), kd->Hi[1]);
/* AES rounds 5 and 6 */
- aesni_gcm_enc_round (r, k[5], 4);
- aesni_gcm_enc_round (r, k[6], 4);
+ aesni_gcm_enc_round (r, rk[5], 4);
+ aesni_gcm_enc_round (r, rk[6], 4);
/* GHASH multiply block 7 */
ghash_mul_next (gd, aesni_gcm_bswap (d[3]), kd->Hi[0]);
/* AES rounds 7 and 8 */
- aesni_gcm_enc_round (r, k[7], 4);
- aesni_gcm_enc_round (r, k[8], 4);
+ aesni_gcm_enc_round (r, rk[7], 4);
+ aesni_gcm_enc_round (r, rk[8], 4);
/* GHASH reduce 1st step */
ghash_reduce (gd);
/* AES round 9 */
- aesni_gcm_enc_round (r, k[9], 4);
+ aesni_gcm_enc_round (r, rk[9], 4);
/* load data - encrypt round */
if (is_encrypt)
ghash_reduce2 (gd);
/* AES last round(s) */
- aesni_gcm_enc_last_round (r, d, k, rounds, 4);
+ aesni_gcm_enc_last_round (r, d, rk, rounds, 4);
/* store data */
aesni_gcm_store (d, outv + 4, 4, 0);
return ghash_final (gd);
}
-static_always_inline __m128i
-aesni_gcm_ghash_last (__m128i T, aes_gcm_key_data_t * kd, __m128i * d,
+static_always_inline u8x16
+aesni_gcm_ghash_last (u8x16 T, aes_gcm_key_data_t * kd, u8x16 * d,
int n_blocks, int n_bytes)
{
ghash_data_t _gd, *gd = &_gd;
if (n_bytes)
- d[n_blocks - 1] = aesni_gcm_byte_mask (d[n_blocks - 1], n_bytes);
+ d[n_blocks - 1] = aes_byte_mask (d[n_blocks - 1], n_bytes);
ghash_mul_first (gd, aesni_gcm_bswap (d[0]) ^ T, kd->Hi[n_blocks - 1]);
if (n_blocks > 1)
}
-static_always_inline __m128i
-aesni_gcm_enc (__m128i T, aes_gcm_key_data_t * kd, __m128i Y, const u8 * in,
- const u8 * out, u32 n_left, int rounds)
+static_always_inline u8x16
+aesni_gcm_enc (u8x16 T, aes_gcm_key_data_t * kd, u32x4 Y, u8x16u * inv,
+ u8x16u * outv, u32 n_left, int rounds)
{
- __m128i *inv = (__m128i *) in, *outv = (__m128i *) out;
- __m128i d[4];
+ u8x16 d[4];
u32 ctr = 1;
if (n_left == 0)
return aesni_gcm_ghash_last (T, kd, d, 1, n_left);
}
-static_always_inline __m128i
-aesni_gcm_dec (__m128i T, aes_gcm_key_data_t * kd, __m128i Y, const u8 * in,
- const u8 * out, u32 n_left, int rounds)
+static_always_inline u8x16
+aesni_gcm_dec (u8x16 T, aes_gcm_key_data_t * kd, u32x4 Y, u8x16u * inv,
+ u8x16u * outv, u32 n_left, int rounds)
{
- __m128i *inv = (__m128i *) in, *outv = (__m128i *) out;
- __m128i d[8];
+ u8x16 d[8];
u32 ctr = 1;
while (n_left >= 128)
}
static_always_inline int
-aes_gcm (const u8 * in, u8 * out, const u8 * addt, const u8 * iv, u8 * tag,
+aes_gcm (u8x16u * in, u8x16u * out, u8x16u * addt, u8x16u * iv, u8x16u * tag,
u32 data_bytes, u32 aad_bytes, u8 tag_len, aes_gcm_key_data_t * kd,
int aes_rounds, int is_encrypt)
{
int i;
- __m128i r, Y0, T = { };
+ u8x16 r, T = { };
+ u32x4 Y0;
ghash_data_t _gd, *gd = &_gd;
_mm_prefetch (iv, _MM_HINT_T0);
/* calculate ghash for AAD - optimized for ipsec common cases */
if (aad_bytes == 8)
- T = aesni_gcm_ghash (T, kd, (__m128i *) addt, 8);
+ T = aesni_gcm_ghash (T, kd, addt, 8);
else if (aad_bytes == 12)
- T = aesni_gcm_ghash (T, kd, (__m128i *) addt, 12);
+ T = aesni_gcm_ghash (T, kd, addt, 12);
else
- T = aesni_gcm_ghash (T, kd, (__m128i *) addt, aad_bytes);
+ T = aesni_gcm_ghash (T, kd, addt, aad_bytes);
/* initalize counter */
- Y0 = CLIB_MEM_OVERFLOW_LOAD (_mm_loadu_si128, (__m128i *) iv);
- Y0 = _mm_insert_epi32 (Y0, clib_host_to_net_u32 (1), 3);
+ Y0 = (u32x4) aes_load_partial (iv, 12);
+ Y0[3] = clib_host_to_net_u32 (1);
/* ghash and encrypt/edcrypt */
if (is_encrypt)
_mm_prefetch (tag, _MM_HINT_T0);
- /* Finalize ghash */
- r[0] = data_bytes;
- r[1] = aad_bytes;
-
- /* bytes to bits */
- r <<= 3;
+ /* Finalize ghash - data bytes and aad bytes converted to bits */
+ /* *INDENT-OFF* */
+ r = (u8x16) ((u64x2) {data_bytes, aad_bytes} << 3);
+ /* *INDENT-ON* */
/* interleaved computation of final ghash and E(Y0, k) */
ghash_mul_first (gd, r ^ T, kd->Hi[0]);
- r = kd->Ke[0] ^ Y0;
+ r = kd->Ke[0] ^ (u8x16) Y0;
for (i = 1; i < 5; i += 1)
- r = _mm_aesenc_si128 (r, kd->Ke[i]);
+ r = aes_enc_round (r, kd->Ke[i]);
ghash_reduce (gd);
ghash_reduce2 (gd);
for (; i < 9; i += 1)
- r = _mm_aesenc_si128 (r, kd->Ke[i]);
+ r = aes_enc_round (r, kd->Ke[i]);
T = ghash_final (gd);
for (; i < aes_rounds; i += 1)
- r = _mm_aesenc_si128 (r, kd->Ke[i]);
- r = _mm_aesenclast_si128 (r, kd->Ke[aes_rounds]);
+ r = aes_enc_round (r, kd->Ke[i]);
+ r = aes_enc_last_round (r, kd->Ke[aes_rounds]);
T = aesni_gcm_bswap (T) ^ r;
/* tag_len 16 -> 0 */
{
/* store tag */
if (tag_len)
- aesni_gcm_store_partial ((__m128i *) tag, T, (1 << tag_len) - 1);
+ aes_store_partial (tag, T, (1 << tag_len) - 1);
else
- _mm_storeu_si128 ((__m128i *) tag, T);
+ tag[0] = T;
}
else
{
/* check tag */
u16 tag_mask = tag_len ? (1 << tag_len) - 1 : 0xffff;
- r = _mm_loadu_si128 ((__m128i *) tag);
- if (_mm_movemask_epi8 (r == T) != tag_mask)
+ if ((u8x16_msb_mask (tag[0] == T) & tag_mask) != tag_mask)
return 0;
}
return 1;
next:
kd = (aes_gcm_key_data_t *) cm->key_data[op->key_index];
- aes_gcm (op->src, op->dst, op->aad, op->iv, op->tag, op->len, op->aad_len,
+ aes_gcm ((u8x16u *) op->src, (u8x16u *) op->dst, (u8x16u *) op->aad,
+ (u8x16u *) op->iv, (u8x16u *) op->tag, op->len, op->aad_len,
op->tag_len, kd, AES_KEY_ROUNDS (ks), /* is_encrypt */ 1);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
next:
kd = (aes_gcm_key_data_t *) cm->key_data[op->key_index];
- rv = aes_gcm (op->src, op->dst, op->aad, op->iv, op->tag, op->len,
+ rv = aes_gcm ((u8x16u *) op->src, (u8x16u *) op->dst, (u8x16u *) op->aad,
+ (u8x16u *) op->iv, (u8x16u *) op->tag, op->len,
op->aad_len, op->tag_len, kd, AES_KEY_ROUNDS (ks),
/* is_encrypt */ 0);
aesni_gcm_key_exp (vnet_crypto_key_t * key, aes_key_size_t ks)
{
aes_gcm_key_data_t *kd;
- __m128i H;
- int i;
+ u8x16 H;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
/* expand AES key */
- aes_key_expand ((__m128i *) kd->Ke, key->data, ks);
+ aes_key_expand ((u8x16 *) kd->Ke, key->data, ks);
/* pre-calculate H */
- H = kd->Ke[0];
- for (i = 1; i < AES_KEY_ROUNDS (ks); i += 1)
- H = _mm_aesenc_si128 (H, kd->Ke[i]);
- H = _mm_aesenclast_si128 (H, kd->Ke[i]);
+ H = aes_encrypt_block (u8x16_splat (0), kd->Ke, ks);
H = aesni_gcm_bswap (H);
- ghash_precompute (H, (__m128i *) kd->Hi, 8);
+ ghash_precompute (H, (u8x16 *) kd->Hi, 8);
return kd;
}
Code Review / vpp.git / blobdiff