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);
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[i] != ops[0]->key)
132 aes_key_expand (k[i], ops[0]->key, ks);
133 key[i] = ops[0]->key;
135 ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
141 count = u32x4_min_scalar (len);
143 ASSERT (count % 16 == 0);
145 for (i = 0; i < count; i += 16)
147 r[0] ^= _mm_loadu_si128 ((__m128i *) (src[0] + i)) ^ k[0][0];
148 r[1] ^= _mm_loadu_si128 ((__m128i *) (src[1] + i)) ^ k[1][0];
149 r[2] ^= _mm_loadu_si128 ((__m128i *) (src[2] + i)) ^ k[2][0];
150 r[3] ^= _mm_loadu_si128 ((__m128i *) (src[3] + i)) ^ k[3][0];
152 for (j = 1; j < rounds; j++)
154 r[0] = _mm_aesenc_si128 (r[0], k[0][j]);
155 r[1] = _mm_aesenc_si128 (r[1], k[1][j]);
156 r[2] = _mm_aesenc_si128 (r[2], k[2][j]);
157 r[3] = _mm_aesenc_si128 (r[3], k[3][j]);
160 r[0] = _mm_aesenclast_si128 (r[0], k[0][j]);
161 r[1] = _mm_aesenclast_si128 (r[1], k[1][j]);
162 r[2] = _mm_aesenclast_si128 (r[2], k[2][j]);
163 r[3] = _mm_aesenclast_si128 (r[3], k[3][j]);
165 _mm_storeu_si128 ((__m128i *) (dst[0] + i), r[0]);
166 _mm_storeu_si128 ((__m128i *) (dst[1] + i), r[1]);
167 _mm_storeu_si128 ((__m128i *) (dst[2] + i), r[2]);
168 _mm_storeu_si128 ((__m128i *) (dst[3] + i), r[3]);
171 for (i = 0; i < 4; i++)
181 if (!u32x4_is_all_zero (len & dummy_mask))
187 static_always_inline u32
188 aesni_ops_dec_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
189 u32 n_ops, aesni_key_size_t ks)
191 int rounds = AESNI_KEY_ROUNDS (ks);
192 vnet_crypto_op_t *op = ops[0];
195 __m128i k[rounds + 1];
201 aes_key_expand (k, op->key, ks);
202 aes_key_enc_to_dec (k, ks);
205 aes_cbc_dec (k, op->src, op->dst, op->iv, op->len, rounds);
206 op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
211 if (last_key != op->key)
219 #define foreach_aesni_cbc_handler_type _(128) _(192) _(256)
222 static u32 aesni_ops_dec_aes_cbc_##x \
223 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
224 { return aesni_ops_dec_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
225 static u32 aesni_ops_enc_aes_cbc_##x \
226 (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
227 { return aesni_ops_enc_aes_cbc (vm, ops, n_ops, AESNI_KEY_##x); } \
229 foreach_aesni_cbc_handler_type;
235 crypto_ia32_aesni_cbc_init (vlib_main_t * vm)
237 crypto_ia32_main_t *cm = &crypto_ia32_main;
238 crypto_ia32_per_thread_data_t *ptd;
239 clib_error_t *err = 0;
242 if ((fd = open ("/dev/urandom", O_RDONLY)) < 0)
243 return clib_error_return_unix (0, "failed to open '/dev/urandom'");
246 vec_foreach (ptd, cm->per_thread_data)
248 for (int i = 0; i < 4; i++)
250 if (read(fd, ptd->cbc_iv, sizeof (ptd->cbc_iv)) !=
251 sizeof (ptd->cbc_iv))
253 err = clib_error_return_unix (0, "'/dev/urandom' read failure");
261 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
262 VNET_CRYPTO_OP_AES_##x##_CBC_ENC, \
263 aesni_ops_enc_aes_cbc_##x); \
264 vnet_crypto_register_ops_handler (vm, cm->crypto_engine_index, \
265 VNET_CRYPTO_OP_AES_##x##_CBC_DEC, \
266 aesni_ops_dec_aes_cbc_##x);
267 foreach_aesni_cbc_handler_type;
276 * fd.io coding-style-patch-verification: ON
279 * eval: (c-set-style "gnu")