2 *------------------------------------------------------------------
3 * Copyright (c) 2020 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 *------------------------------------------------------------------
20 static_always_inline void
21 aes_cbc_dec (u8x16 * k, u8 * src, u8 * dst, u8 * iv, int count, int rounds)
23 u8x16 r0, r1, r2, r3, c0, c1, c2, c3, f;
29 c0 = r0 = vld1q_u8 (src);
30 c1 = r1 = vld1q_u8 (src + 16);
31 c2 = r2 = vld1q_u8 (src + 32);
32 c3 = r3 = vld1q_u8 (src + 48);
33 for (int i = 0; i < rounds - 1; i++)
35 r0 = vaesimcq_u8 (vaesdq_u8 (r0, k[i]));
36 r1 = vaesimcq_u8 (vaesdq_u8 (r1, k[i]));
37 r2 = vaesimcq_u8 (vaesdq_u8 (r2, k[i]));
38 r3 = vaesimcq_u8 (vaesdq_u8 (r3, k[i]));
40 r0 = vaesdq_u8 (r0, k[rounds - 1]) ^ k[rounds];
41 r1 = vaesdq_u8 (r1, k[rounds - 1]) ^ k[rounds];
42 r2 = vaesdq_u8 (r2, k[rounds - 1]) ^ k[rounds];
43 r3 = vaesdq_u8 (r3, k[rounds - 1]) ^ k[rounds];
44 vst1q_u8 (dst, r0 ^ f);
45 vst1q_u8 (dst + 16, r1 ^ c0);
46 vst1q_u8 (dst + 32, r2 ^ c1);
47 vst1q_u8 (dst + 48, r3 ^ c2);
57 c0 = r0 = vld1q_u8 (src);
58 for (int i = 0; i < rounds - 1; i++)
59 r0 = vaesimcq_u8 (vaesdq_u8 (r0, k[i]));
60 r0 = vaesdq_u8 (r0, k[rounds - 1]) ^ k[rounds];
61 vst1q_u8 (dst, r0 ^ f);
70 static_always_inline u32
71 aesni_ops_enc_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
72 u32 n_ops, aes_key_size_t ks)
74 crypto_native_main_t *cm = &crypto_native_main;
75 crypto_native_per_thread_data_t *ptd =
76 vec_elt_at_index (cm->per_thread_data, vm->thread_index);
77 int rounds = AES_KEY_ROUNDS (ks);
79 u32 i, j, count, n_left = n_ops;
80 u32x4 dummy_mask = { };
82 vnet_crypto_key_index_t key_index[4];
88 for (i = 0; i < 4; i++)
92 for (i = 0; i < 4; i++)
97 /* no more work to enqueue, so we are enqueueing dummy buffer */
98 src[i] = dst[i] = dummy;
99 len[i] = sizeof (dummy);
104 if (ops[0]->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
106 r[i] = ptd->cbc_iv[i];
107 vst1q_u8 (ops[0]->iv, r[i]);
108 ptd->cbc_iv[i] = vaeseq_u8 (r[i], r[i]);
111 r[i] = vld1q_u8 (ops[0]->iv);
113 src[i] = ops[0]->src;
114 dst[i] = ops[0]->dst;
115 len[i] = ops[0]->len;
117 if (key_index[i] != ops[0]->key_index)
119 aes_cbc_key_data_t *kd;
120 key_index[i] = ops[0]->key_index;
121 kd = (aes_cbc_key_data_t *) cm->key_data[key_index[i]];
122 for (j = 0; j < rounds + 1; j++)
123 k[j][i] = kd->encrypt_key[j];
125 ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
131 count = u32x4_min_scalar (len);
133 ASSERT (count % 16 == 0);
135 for (i = 0; i < count; i += 16)
137 r[0] ^= vld1q_u8 (src[0] + i);
138 r[1] ^= vld1q_u8 (src[1] + i);
139 r[2] ^= vld1q_u8 (src[2] + i);
140 r[3] ^= vld1q_u8 (src[3] + i);
141 for (j = 0; j < rounds - 1; j++)
143 r[0] = vaesmcq_u8 (vaeseq_u8 (r[0], k[j][0]));
144 r[1] = vaesmcq_u8 (vaeseq_u8 (r[1], k[j][1]));
145 r[2] = vaesmcq_u8 (vaeseq_u8 (r[2], k[j][2]));
146 r[3] = vaesmcq_u8 (vaeseq_u8 (r[3], k[j][3]));
148 r[0] = vaeseq_u8 (r[0], k[j][0]) ^ k[rounds][0];
149 r[1] = vaeseq_u8 (r[1], k[j][1]) ^ k[rounds][1];
150 r[2] = vaeseq_u8 (r[2], k[j][2]) ^ k[rounds][2];
151 r[3] = vaeseq_u8 (r[3], k[j][3]) ^ k[rounds][3];
152 vst1q_u8 (dst[0] + i, r[0]);
153 vst1q_u8 (dst[1] + i, r[1]);
154 vst1q_u8 (dst[2] + i, r[2]);
155 vst1q_u8 (dst[3] + i, r[3]);
158 for (i = 0; i < 4; i++)
168 if (!u32x4_is_all_zero (len & dummy_mask))
174 static_always_inline u32
175 aesni_ops_dec_aes_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[],
176 u32 n_ops, aes_key_size_t ks)
178 crypto_native_main_t *cm = &crypto_native_main;
179 int rounds = AES_KEY_ROUNDS (ks);
180 vnet_crypto_op_t *op = ops[0];
181 aes_cbc_key_data_t *kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
187 aes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds);
188 op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
193 kd = (aes_cbc_key_data_t *) cm->key_data[op->key_index];
203 * fd.io coding-style-patch-verification: ON
206 * eval: (c-set-style "gnu")