2 *------------------------------------------------------------------
3 * Copyright (c) 2019 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
18 #include <vlib/vlib.h>
19 #include <vnet/plugin/plugin.h>
20 #include <vnet/crypto/crypto.h>
21 #include <x86intrin.h>
22 #include <crypto_ia32/crypto_ia32.h>
23 #include <crypto_ia32/aesni.h>
25 #if __GNUC__ > 4 && !__clang__ && CLIB_DEBUG == 0
26 #pragma GCC optimize ("O3")
31 __m128i encrypt_key[15];
32 __m128i decrypt_key[15];
35 static_always_inline void
36 aes_cbc_dec (__m128i * k, u8 * src, u8 * dst, u8 * iv, int count,
37 aesni_key_size_t rounds)
39 __m128i r0, r1, r2, r3, c0, c1, c2, c3, f;
42 f = _mm_loadu_si128 ((__m128i *) iv);
46 _mm_prefetch (src + 128, _MM_HINT_T0);
47 _mm_prefetch (dst + 128, _MM_HINT_T0);
49 c0 = _mm_loadu_si128 (((__m128i *) src + 0));
50 c1 = _mm_loadu_si128 (((__m128i *) src + 1));
51 c2 = _mm_loadu_si128 (((__m128i *) src + 2));
52 c3 = _mm_loadu_si128 (((__m128i *) src + 3));
59 for (i = 1; i < rounds; i++)
61 r0 = _mm_aesdec_si128 (r0, k[i]);
62 r1 = _mm_aesdec_si128 (r1, k[i]);
63 r2 = _mm_aesdec_si128 (r2, k[i]);
64 r3 = _mm_aesdec_si128 (r3, k[i]);
67 r0 = _mm_aesdeclast_si128 (r0, k[i]);
68 r1 = _mm_aesdeclast_si128 (r1, k[i]);
69 r2 = _mm_aesdeclast_si128 (r2, k[i]);
70 r3 = _mm_aesdeclast_si128 (r3, k[i]);
72 _mm_storeu_si128 ((__m128i *) dst + 0, r0 ^ f);
73 _mm_storeu_si128 ((__m128i *) dst + 1, r1 ^ c0);
74 _mm_storeu_si128 ((__m128i *) dst + 2, r2 ^ c1);
75 _mm_storeu_si128 ((__m128i *) dst + 3, r3 ^ c2);
86 c0 = _mm_loadu_si128 (((__m128i *) src));
88 for (i = 1; i < rounds; i++)
89 r0 = _mm_aesdec_si128 (r0, k[i]);
90 r0 = _mm_aesdeclast_si128 (r0, k[i]);
91 _mm_storeu_si128 ((__m128i *) dst, r0 ^ f);
99 static_always_inline u32
100 aesni_ops_enc_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
101 u32 n_ops, aesni_key_size_t ks)
103 crypto_ia32_main_t *cm = &crypto_ia32_main;
104 crypto_ia32_per_thread_data_t *ptd = vec_elt_at_index (cm->per_thread_data,
106 int rounds = AESNI_KEY_ROUNDS (ks);
110 vnet_crypto_key_index_t key_index[4] = { ~0, ~0, ~0, ~0 };
111 u32x4 dummy_mask = { };
113 u32 i, j, count, n_left = n_ops;
114 __m128i r[4] = { }, k[4][rounds + 1];
117 for (i = 0; i < 4; i++)
122 /* no more work to enqueue, so we are enqueueing dummy buffer */
123 src[i] = dst[i] = dummy;
124 len[i] = sizeof (dummy);
129 if (ops[0]->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
131 r[i] = ptd->cbc_iv[i];
132 _mm_storeu_si128 ((__m128i *) ops[0]->iv, r[i]);
133 ptd->cbc_iv[i] = _mm_aesenc_si128 (r[i], r[i]);
136 r[i] = _mm_loadu_si128 ((__m128i *) ops[0]->iv);
137 src[i] = ops[0]->src;
138 dst[i] = ops[0]->dst;
139 len[i] = ops[0]->len;
141 if (key_index[i] != ops[0]->key_index)
143 aes_cbc_key_data_t *kd;
144 key_index[i] = ops[0]->key_index;
145 kd = (aes_cbc_key_data_t *) cm->key_data[key_index[i]];
146 clib_memcpy_fast (k[i], kd->encrypt_key,
147 (rounds + 1) * sizeof (__m128i));
149 ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
155 count = u32x4_min_scalar (len);
157 ASSERT (count % 16 == 0);
159 for (i = 0; i < count; i += 16)
161 r[0] ^= _mm_loadu_si128 ((__m128i *) (src[0] + i)) ^ k[0][0];
162 r[1] ^= _mm_loadu_si128 ((__m128i *) (src[1] + i)) ^ k[1][0];
163 r[2] ^= _mm_loadu_si128 ((__m128i *) (src[2] + i)) ^ k[2][0];
164 r[3] ^= _mm_loadu_si128 ((__m128i *) (src[3] + i)) ^ k[3][0];
166 for (j = 1; j < rounds; j++)
168 r[0] = _mm_aesenc_si128 (r[0], k[0][j]);
169 r[1] = _mm_aesenc_si128 (r[1], k[1][j]);
170 r[2] = _mm_aesenc_si128 (r[2], k[2][j]);
171 r[3] = _mm_aesenc_si128 (r[3], k[3][j]);
174 r[0] = _mm_aesenclast_si128 (r[0], k[0][j]);
175 r[1] = _mm_aesenclast_si128 (r[1], k[1][j]);
176 r[2] = _mm_aesenclast_si128 (r[2], k[2][j]);
177 r[3] = _mm_aesenclast_si128 (r[3], k[3][j]);
179 _mm_storeu_si128 ((__m128i *) (dst[0] + i), r[0]);
180 _mm_storeu_si128 ((__m128i *) (dst[1] + i), r[1]);
181 _mm_storeu_si128 ((__m128i *) (dst[2] + i), r[2]);
182 _mm_storeu_si128 ((__m128i *) (dst[3] + i), r[3]);
185 for (i = 0; i < 4; i++)
195 if (!u32x4_is_all_zero (len & dummy_mask))
201 static_always_inline u32
202 aesni_ops_dec_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
203 u32 n_ops, aesni_key_size_t ks)
205 crypto_ia32_main_t *cm = &crypto_ia32_main;
206 int rounds = AESNI_KEY_ROUNDS (ks);
207 vnet_crypto_op_t *op = ops[0];
208 aes_cbc_key_data_t *kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
214 aes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds);
215 op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
220 kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
227 static_always_inline void *
228 aesni_cbc_key_exp (vnet_crypto_key_t * key, aesni_key_size_t ks)
230 aes_cbc_key_data_t *kd;
231 kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
232 aes_key_expand (kd->encrypt_key, key->data, ks);
233 aes_key_expand (kd->decrypt_key, key->data, ks);
234 aes_key_enc_to_dec (kd->decrypt_key, ks);
238 #define foreach_aesni_cbc_handler_type _(128) _(192) _(256)
241 static u32 aesni_ops_dec_aes_cbc_##x \
242 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
243 { return aesni_ops_dec_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
244 static u32 aesni_ops_enc_aes_cbc_##x \
245 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
246 { return aesni_ops_enc_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
247 static void * aesni_cbc_key_exp_##x (vnet_crypto_key_t *key) \
248 { return aesni_cbc_key_exp (key, AESNI_KEY_##x); }
250 foreach_aesni_cbc_handler_type;
257 crypto_ia32_aesni_cbc_init_avx512 (vlib_main_t * vm)
259 crypto_ia32_aesni_cbc_init_avx2 (vlib_main_t * vm)
261 crypto_ia32_aesni_cbc_init_sse42 (vlib_main_t * vm)
264 crypto_ia32_main_t *cm = &crypto_ia32_main;
265 crypto_ia32_per_thread_data_t *ptd;
266 clib_error_t *err = 0;
269 if ((fd = open ("/dev/urandom", O_RDONLY)) < 0)
270 return clib_error_return_unix (0, "failed to open '/dev/urandom'");
273 vec_foreach (ptd, cm->per_thread_data)
275 for (int i = 0; i < 4; i++)
277 if (read(fd, ptd->cbc_iv, sizeof (ptd->cbc_iv)) !=
278 sizeof (ptd->cbc_iv))
280 err = clib_error_return_unix (0, "'/dev/urandom' read failure");
288 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
289 VNET_CRYPTO_OP_AES_##x##_CBC_ENC, \
290 aesni_ops_enc_aes_cbc_##x); \
291 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
292 VNET_CRYPTO_OP_AES_##x##_CBC_DEC, \
293 aesni_ops_dec_aes_cbc_##x); \
294 cm->key_fn[VNET_CRYPTO_ALG_AES_##x##_CBC] = aesni_cbc_key_exp_##x;
295 foreach_aesni_cbc_handler_type;
304 * fd.io coding-style-patch-verification: ON
307 * eval: (c-set-style "gnu")