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authorDamjan Marion <dmarion@me.com>2020-01-31 10:24:07 +0100
committerDamjan Marion <damarion@cisco.com>2020-01-31 18:06:09 +0100
commit776644efe78f427a75fc5e122014b44b39d470c3 (patch)
treef8487ba02ad941bc2c09206b3d0477db3cc595ba /src/plugins/crypto_native/aes_cbc_aesni.h
parent62b1cea6eda4060968f44b2639fdd756617211f4 (diff)
crypto-native: add ARMv8 AES-CBC implementation
Type: feature Change-Id: I32256061b9509880eec843db2f918879cdafbe47 Signed-off-by: Damjan Marion <dmarion@me.com>
Diffstat (limited to 'src/plugins/crypto_native/aes_cbc_aesni.h')
-rw-r--r--src/plugins/crypto_native/aes_cbc_aesni.h381
1 files changed, 381 insertions, 0 deletions
diff --git a/src/plugins/crypto_native/aes_cbc_aesni.h b/src/plugins/crypto_native/aes_cbc_aesni.h
new file mode 100644
index 00000000000..206dace5d56
--- /dev/null
+++ b/src/plugins/crypto_native/aes_cbc_aesni.h
@@ -0,0 +1,381 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#ifdef __x86_64__
+
+static_always_inline u8x16 __clib_unused
+xor3 (u8x16 a, u8x16 b, u8x16 c)
+{
+#if __AVX512F__
+ return (u8x16) _mm_ternarylogic_epi32 ((__m128i) a, (__m128i) b,
+ (__m128i) c, 0x96);
+#endif
+ return a ^ b ^ c;
+}
+
+#if __VAES__
+static_always_inline __m512i
+xor3_x4 (__m512i a, __m512i b, __m512i c)
+{
+ return _mm512_ternarylogic_epi32 (a, b, c, 0x96);
+}
+
+static_always_inline __m512i
+aes_block_load_x4 (u8 * src[], int i)
+{
+ __m512i r = { };
+ r = _mm512_inserti64x2 (r, (__m128i) aes_block_load (src[0] + i), 0);
+ r = _mm512_inserti64x2 (r, (__m128i) aes_block_load (src[1] + i), 1);
+ r = _mm512_inserti64x2 (r, (__m128i) aes_block_load (src[2] + i), 2);
+ r = _mm512_inserti64x2 (r, (__m128i) aes_block_load (src[3] + i), 3);
+ return r;
+}
+
+static_always_inline void
+aes_block_store_x4 (u8 * dst[], int i, __m512i r)
+{
+ aes_block_store (dst[0] + i, (u8x16) _mm512_extracti64x2_epi64 (r, 0));
+ aes_block_store (dst[1] + i, (u8x16) _mm512_extracti64x2_epi64 (r, 1));
+ aes_block_store (dst[2] + i, (u8x16) _mm512_extracti64x2_epi64 (r, 2));
+ aes_block_store (dst[3] + i, (u8x16) _mm512_extracti64x2_epi64 (r, 3));
+}
+#endif
+
+static_always_inline void __clib_unused
+aes_cbc_dec (u8x16 * k, u8 * src, u8 * dst, u8 * iv, int count,
+ aes_key_size_t rounds)
+{
+ u8x16 r0, r1, r2, r3, c0, c1, c2, c3, f;
+ int i;
+
+ f = aes_block_load (iv);
+
+ while (count >= 64)
+ {
+ _mm_prefetch (src + 128, _MM_HINT_T0);
+ _mm_prefetch (dst + 128, _MM_HINT_T0);
+
+ c0 = aes_block_load (src);
+ c1 = aes_block_load (src + 16);
+ c2 = aes_block_load (src + 32);
+ c3 = aes_block_load (src + 48);
+
+ r0 = c0 ^ k[0];
+ r1 = c1 ^ k[0];
+ r2 = c2 ^ k[0];
+ r3 = c3 ^ k[0];
+
+ for (i = 1; i < rounds; i++)
+ {
+ r0 = aes_dec_round (r0, k[i]);
+ r1 = aes_dec_round (r1, k[i]);
+ r2 = aes_dec_round (r2, k[i]);
+ r3 = aes_dec_round (r3, k[i]);
+ }
+
+ r0 = aes_dec_last_round (r0, k[i]);
+ r1 = aes_dec_last_round (r1, k[i]);
+ r2 = aes_dec_last_round (r2, k[i]);
+ r3 = aes_dec_last_round (r3, k[i]);
+
+ aes_block_store (dst, r0 ^ f);
+ aes_block_store (dst + 16, r1 ^ c0);
+ aes_block_store (dst + 32, r2 ^ c1);
+ aes_block_store (dst + 48, r3 ^ c2);
+
+ f = c3;
+
+ count -= 64;
+ src += 64;
+ dst += 64;
+ }
+
+ while (count > 0)
+ {
+ c0 = aes_block_load (src);
+ r0 = c0 ^ k[0];
+ for (i = 1; i < rounds; i++)
+ r0 = aes_dec_round (r0, k[i]);
+ r0 = aes_dec_last_round (r0, k[i]);
+ aes_block_store (dst, r0 ^ f);
+ f = c0;
+ count -= 16;
+ src += 16;
+ dst += 16;
+ }
+}
+
+#ifdef __VAES__
+static_always_inline void
+vaes_cbc_dec (__m512i * k, u8 * src, u8 * dst, u8 * iv, int count,
+ aes_key_size_t rounds)
+{
+ __m512i permute = { 6, 7, 8, 9, 10, 11, 12, 13 };
+ __m512i r0, r1, r2, r3, c0, c1, c2, c3, f = { };
+ __mmask8 m;
+ int i, n_blocks = count >> 4;
+
+ f = _mm512_mask_loadu_epi64 (f, 0xc0, (__m512i *) (iv - 48));
+
+ while (n_blocks >= 16)
+ {
+ c0 = _mm512_loadu_si512 ((__m512i *) src);
+ c1 = _mm512_loadu_si512 ((__m512i *) (src + 64));
+ c2 = _mm512_loadu_si512 ((__m512i *) (src + 128));
+ c3 = _mm512_loadu_si512 ((__m512i *) (src + 192));
+
+ r0 = c0 ^ k[0];
+ r1 = c1 ^ k[0];
+ r2 = c2 ^ k[0];
+ r3 = c3 ^ k[0];
+
+ for (i = 1; i < rounds; i++)
+ {
+ r0 = _mm512_aesdec_epi128 (r0, k[i]);
+ r1 = _mm512_aesdec_epi128 (r1, k[i]);
+ r2 = _mm512_aesdec_epi128 (r2, k[i]);
+ r3 = _mm512_aesdec_epi128 (r3, k[i]);
+ }
+
+ r0 = _mm512_aesdeclast_epi128 (r0, k[i]);
+ r1 = _mm512_aesdeclast_epi128 (r1, k[i]);
+ r2 = _mm512_aesdeclast_epi128 (r2, k[i]);
+ r3 = _mm512_aesdeclast_epi128 (r3, k[i]);
+
+ r0 ^= _mm512_permutex2var_epi64 (f, permute, c0);
+ _mm512_storeu_si512 ((__m512i *) dst, r0);
+
+ r1 ^= _mm512_permutex2var_epi64 (c0, permute, c1);
+ _mm512_storeu_si512 ((__m512i *) (dst + 64), r1);
+
+ r2 ^= _mm512_permutex2var_epi64 (c1, permute, c2);
+ _mm512_storeu_si512 ((__m512i *) (dst + 128), r2);
+
+ r3 ^= _mm512_permutex2var_epi64 (c2, permute, c3);
+ _mm512_storeu_si512 ((__m512i *) (dst + 192), r3);
+ f = c3;
+
+ n_blocks -= 16;
+ src += 256;
+ dst += 256;
+ }
+
+ while (n_blocks > 0)
+ {
+ m = (1 << (n_blocks * 2)) - 1;
+ c0 = _mm512_mask_loadu_epi64 (c0, m, (__m512i *) src);
+ f = _mm512_permutex2var_epi64 (f, permute, c0);
+ r0 = c0 ^ k[0];
+ for (i = 1; i < rounds; i++)
+ r0 = _mm512_aesdec_epi128 (r0, k[i]);
+ r0 = _mm512_aesdeclast_epi128 (r0, k[i]);
+ _mm512_mask_storeu_epi64 ((__m512i *) dst, m, r0 ^ f);
+ f = c0;
+ n_blocks -= 4;
+ src += 64;
+ dst += 64;
+ }
+}
+#endif
+
+#ifdef __VAES__
+#define N 16
+#define u32xN u32x16
+#define u32xN_min_scalar u32x16_min_scalar
+#define u32xN_is_all_zero u32x16_is_all_zero
+#else
+#define N 4
+#define u32xN u32x4
+#define u32xN_min_scalar u32x4_min_scalar
+#define u32xN_is_all_zero u32x4_is_all_zero
+#endif
+
+static_always_inline u32
+aesni_ops_enc_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
+ u32 n_ops, aes_key_size_t ks)
+{
+ crypto_native_main_t *cm = &crypto_native_main;
+ crypto_native_per_thread_data_t *ptd =
+ vec_elt_at_index (cm->per_thread_data, vm->thread_index);
+ int rounds = AES_KEY_ROUNDS (ks);
+ u8 dummy[8192];
+ u32 i, j, count, n_left = n_ops;
+ u32xN dummy_mask = { };
+ u32xN len = { };
+ vnet_crypto_key_index_t key_index[N];
+ u8 *src[N] = { };
+ u8 *dst[N] = { };
+ /* *INDENT-OFF* */
+ union
+ {
+ u8x16 x1[N];
+ __m512i x4[N / 4];
+ } r = { }, k[15] = { };
+ /* *INDENT-ON* */
+
+ for (i = 0; i < N; i++)
+ key_index[i] = ~0;
+
+more:
+ for (i = 0; i < N; i++)
+ if (len[i] == 0)
+ {
+ if (n_left == 0)
+ {
+ /* no more work to enqueue, so we are enqueueing dummy buffer */
+ src[i] = dst[i] = dummy;
+ len[i] = sizeof (dummy);
+ dummy_mask[i] = 0;
+ }
+ else
+ {
+ if (ops[0]->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
+ {
+ r.x1[i] = ptd->cbc_iv[i];
+ aes_block_store (ops[0]->iv, r.x1[i]);
+ ptd->cbc_iv[i] = aes_enc_round (r.x1[i], r.x1[i]);
+ }
+ else
+ r.x1[i] = aes_block_load (ops[0]->iv);
+
+ src[i] = ops[0]->src;
+ dst[i] = ops[0]->dst;
+ len[i] = ops[0]->len;
+ dummy_mask[i] = ~0;
+ if (key_index[i] != ops[0]->key_index)
+ {
+ aes_cbc_key_data_t *kd;
+ key_index[i] = ops[0]->key_index;
+ kd = (aes_cbc_key_data_t *) cm->key_data[key_index[i]];
+ for (j = 0; j < rounds + 1; j++)
+ k[j].x1[i] = kd->encrypt_key[j];
+ }
+ ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
+ n_left--;
+ ops++;
+ }
+ }
+
+ count = u32xN_min_scalar (len);
+
+ ASSERT (count % 16 == 0);
+
+ for (i = 0; i < count; i += 16)
+ {
+#ifdef __VAES__
+ r.x4[0] = xor3_x4 (r.x4[0], aes_block_load_x4 (src, i), k[0].x4[0]);
+ r.x4[1] = xor3_x4 (r.x4[1], aes_block_load_x4 (src, i), k[0].x4[1]);
+ r.x4[2] = xor3_x4 (r.x4[2], aes_block_load_x4 (src, i), k[0].x4[2]);
+ r.x4[3] = xor3_x4 (r.x4[3], aes_block_load_x4 (src, i), k[0].x4[3]);
+
+ for (j = 1; j < rounds; j++)
+ {
+ r.x4[0] = _mm512_aesenc_epi128 (r.x4[0], k[j].x4[0]);
+ r.x4[1] = _mm512_aesenc_epi128 (r.x4[1], k[j].x4[1]);
+ r.x4[2] = _mm512_aesenc_epi128 (r.x4[2], k[j].x4[2]);
+ r.x4[3] = _mm512_aesenc_epi128 (r.x4[3], k[j].x4[3]);
+ }
+ r.x4[0] = _mm512_aesenclast_epi128 (r.x4[0], k[j].x4[0]);
+ r.x4[1] = _mm512_aesenclast_epi128 (r.x4[1], k[j].x4[1]);
+ r.x4[2] = _mm512_aesenclast_epi128 (r.x4[2], k[j].x4[2]);
+ r.x4[3] = _mm512_aesenclast_epi128 (r.x4[3], k[j].x4[3]);
+
+ aes_block_store_x4 (dst, i, r.x4[0]);
+ aes_block_store_x4 (dst + 4, i, r.x4[1]);
+ aes_block_store_x4 (dst + 8, i, r.x4[2]);
+ aes_block_store_x4 (dst + 12, i, r.x4[3]);
+#else
+ r.x1[0] = xor3 (r.x1[0], aes_block_load (src[0] + i), k[0].x1[0]);
+ r.x1[1] = xor3 (r.x1[1], aes_block_load (src[1] + i), k[0].x1[1]);
+ r.x1[2] = xor3 (r.x1[2], aes_block_load (src[2] + i), k[0].x1[2]);
+ r.x1[3] = xor3 (r.x1[3], aes_block_load (src[3] + i), k[0].x1[3]);
+
+ for (j = 1; j < rounds; j++)
+ {
+ r.x1[0] = aes_enc_round (r.x1[0], k[j].x1[0]);
+ r.x1[1] = aes_enc_round (r.x1[1], k[j].x1[1]);
+ r.x1[2] = aes_enc_round (r.x1[2], k[j].x1[2]);
+ r.x1[3] = aes_enc_round (r.x1[3], k[j].x1[3]);
+ }
+
+ r.x1[0] = aes_enc_last_round (r.x1[0], k[j].x1[0]);
+ r.x1[1] = aes_enc_last_round (r.x1[1], k[j].x1[1]);
+ r.x1[2] = aes_enc_last_round (r.x1[2], k[j].x1[2]);
+ r.x1[3] = aes_enc_last_round (r.x1[3], k[j].x1[3]);
+
+ aes_block_store (dst[0] + i, r.x1[0]);
+ aes_block_store (dst[1] + i, r.x1[1]);
+ aes_block_store (dst[2] + i, r.x1[2]);
+ aes_block_store (dst[3] + i, r.x1[3]);
+#endif
+ }
+
+ for (i = 0; i < N; i++)
+ {
+ src[i] += count;
+ dst[i] += count;
+ len[i] -= count;
+ }
+
+ if (n_left > 0)
+ goto more;
+
+ if (!u32xN_is_all_zero (len & dummy_mask))
+ goto more;
+
+ return n_ops;
+}
+
+static_always_inline u32
+aesni_ops_dec_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
+ u32 n_ops, aes_key_size_t ks)
+{
+ crypto_native_main_t *cm = &crypto_native_main;
+ int rounds = AES_KEY_ROUNDS (ks);
+ vnet_crypto_op_t *op = ops[0];
+ aes_cbc_key_data_t *kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
+ u32 n_left = n_ops;
+
+ ASSERT (n_ops >= 1);
+
+decrypt:
+#ifdef __VAES__
+ vaes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds);
+#else
+ aes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds);
+#endif
+ op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
+
+ if (--n_left)
+ {
+ op += 1;
+ kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
+ goto decrypt;
+ }
+
+ return n_ops;
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */