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 static_always_inline void
26 aes_cbc_dec (__m128i * k, u8 * src, u8 * dst, u8 * iv, int count,
27 aesni_key_size_t rounds)
29 __m128i r0, r1, r2, r3, c0, c1, c2, c3, f;
32 f = _mm_loadu_si128 ((__m128i *) iv);
36 _mm_prefetch (src + 128, _MM_HINT_T0);
37 _mm_prefetch (dst + 128, _MM_HINT_T0);
39 c0 = _mm_loadu_si128 (((__m128i *) src + 0));
40 c1 = _mm_loadu_si128 (((__m128i *) src + 1));
41 c2 = _mm_loadu_si128 (((__m128i *) src + 2));
42 c3 = _mm_loadu_si128 (((__m128i *) src + 3));
49 for (i = 1; i < rounds; i++)
51 r0 = _mm_aesdec_si128 (r0, k[i]);
52 r1 = _mm_aesdec_si128 (r1, k[i]);
53 r2 = _mm_aesdec_si128 (r2, k[i]);
54 r3 = _mm_aesdec_si128 (r3, k[i]);
57 r0 = _mm_aesdeclast_si128 (r0, k[i]);
58 r1 = _mm_aesdeclast_si128 (r1, k[i]);
59 r2 = _mm_aesdeclast_si128 (r2, k[i]);
60 r3 = _mm_aesdeclast_si128 (r3, k[i]);
62 _mm_storeu_si128 ((__m128i *) dst + 0, r0 ^ f);
63 _mm_storeu_si128 ((__m128i *) dst + 1, r1 ^ c0);
64 _mm_storeu_si128 ((__m128i *) dst + 2, r2 ^ c1);
65 _mm_storeu_si128 ((__m128i *) dst + 3, r3 ^ c2);
76 c0 = _mm_loadu_si128 (((__m128i *) src));
78 for (i = 1; i < rounds; i++)
79 r0 = _mm_aesdec_si128 (r0, k[i]);
80 r0 = _mm_aesdeclast_si128 (r0, k[i]);
81 _mm_storeu_si128 ((__m128i *) dst, r0 ^ f);
89 static_always_inline u32
90 aesni_ops_enc_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
91 u32 n_ops, aesni_key_size_t ks)
93 crypto_ia32_main_t *cm = &crypto_ia32_main;
94 crypto_ia32_per_thread_data_t *ptd = vec_elt_at_index (cm->per_thread_data,
96 int rounds = AESNI_KEY_ROUNDS (ks);
100 vnet_crypto_key_index_t key_index[4] = { ~0, ~0, ~0, ~0 };
101 u32x4 dummy_mask, len = { };
102 u32 i, j, count, n_left = n_ops;
103 __m128i r[4] = { }, k[4][rounds + 1];
106 for (i = 0; i < 4; i++)
111 /* no more work to enqueue, so we are enqueueing dummy buffer */
112 src[i] = dst[i] = dummy;
113 len[i] = sizeof (dummy);
118 if (ops[0]->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
120 r[i] = ptd->cbc_iv[i];
121 _mm_storeu_si128 ((__m128i *) ops[0]->iv, r[i]);
122 ptd->cbc_iv[i] = _mm_aesenc_si128 (r[i], r[i]);
125 r[i] = _mm_loadu_si128 ((__m128i *) ops[0]->iv);
126 src[i] = ops[0]->src;
127 dst[i] = ops[0]->dst;
128 len[i] = ops[0]->len;
130 if (key_index[i] != ops[0]->key_index)
132 aesni_key_data_t *kd;
133 key_index[i] = ops[0]->key_index;
134 kd = (aesni_key_data_t *) cm->key_data[key_index[i]];
135 clib_memcpy_fast (k[i], kd->encrypt_key,
136 (rounds + 1) * sizeof (__m128i));
138 ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
144 count = u32x4_min_scalar (len);
146 ASSERT (count % 16 == 0);
148 for (i = 0; i < count; i += 16)
150 r[0] ^= _mm_loadu_si128 ((__m128i *) (src[0] + i)) ^ k[0][0];
151 r[1] ^= _mm_loadu_si128 ((__m128i *) (src[1] + i)) ^ k[1][0];
152 r[2] ^= _mm_loadu_si128 ((__m128i *) (src[2] + i)) ^ k[2][0];
153 r[3] ^= _mm_loadu_si128 ((__m128i *) (src[3] + i)) ^ k[3][0];
155 for (j = 1; j < rounds; j++)
157 r[0] = _mm_aesenc_si128 (r[0], k[0][j]);
158 r[1] = _mm_aesenc_si128 (r[1], k[1][j]);
159 r[2] = _mm_aesenc_si128 (r[2], k[2][j]);
160 r[3] = _mm_aesenc_si128 (r[3], k[3][j]);
163 r[0] = _mm_aesenclast_si128 (r[0], k[0][j]);
164 r[1] = _mm_aesenclast_si128 (r[1], k[1][j]);
165 r[2] = _mm_aesenclast_si128 (r[2], k[2][j]);
166 r[3] = _mm_aesenclast_si128 (r[3], k[3][j]);
168 _mm_storeu_si128 ((__m128i *) (dst[0] + i), r[0]);
169 _mm_storeu_si128 ((__m128i *) (dst[1] + i), r[1]);
170 _mm_storeu_si128 ((__m128i *) (dst[2] + i), r[2]);
171 _mm_storeu_si128 ((__m128i *) (dst[3] + i), r[3]);
174 for (i = 0; i < 4; i++)
184 if (!u32x4_is_all_zero (len & dummy_mask))
190 static_always_inline u32
191 aesni_ops_dec_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
192 u32 n_ops, aesni_key_size_t ks)
194 crypto_ia32_main_t *cm = &crypto_ia32_main;
195 int rounds = AESNI_KEY_ROUNDS (ks);
196 vnet_crypto_op_t *op = ops[0];
197 aesni_key_data_t *kd = (aesni_key_data_t *) cm->key_data[op->key_index];
203 aes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds);
204 op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
209 kd = (aesni_key_data_t *) cm->key_data[op->key_index];
216 #define foreach_aesni_cbc_handler_type _(128) _(192) _(256)
219 static u32 aesni_ops_dec_aes_cbc_##x \
220 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
221 { return aesni_ops_dec_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
222 static u32 aesni_ops_enc_aes_cbc_##x \
223 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
224 { return aesni_ops_enc_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
226 foreach_aesni_cbc_handler_type;
232 crypto_ia32_aesni_cbc_init (vlib_main_t * vm)
234 crypto_ia32_main_t *cm = &crypto_ia32_main;
235 crypto_ia32_per_thread_data_t *ptd;
236 clib_error_t *err = 0;
239 if ((fd = open ("/dev/urandom", O_RDONLY)) < 0)
240 return clib_error_return_unix (0, "failed to open '/dev/urandom'");
243 vec_foreach (ptd, cm->per_thread_data)
245 for (int i = 0; i < 4; i++)
247 if (read(fd, ptd->cbc_iv, sizeof (ptd->cbc_iv)) !=
248 sizeof (ptd->cbc_iv))
250 err = clib_error_return_unix (0, "'/dev/urandom' read failure");
258 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
259 VNET_CRYPTO_OP_AES_##x##_CBC_ENC, \
260 aesni_ops_enc_aes_cbc_##x); \
261 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
262 VNET_CRYPTO_OP_AES_##x##_CBC_DEC, \
263 aesni_ops_dec_aes_cbc_##x);
264 foreach_aesni_cbc_handler_type;
273 * fd.io coding-style-patch-verification: ON
276 * eval: (c-set-style "gnu")