diff options
Diffstat (limited to 'src/plugins/crypto_native/aes_cbc_neon.h')
| -rw-r--r-- | src/plugins/crypto_native/aes_cbc_neon.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/plugins/crypto_native/aes_cbc_neon.h b/src/plugins/crypto_native/aes_cbc_neon.h new file mode 100644 index 00000000000..4a9c3cd3986 --- /dev/null +++ b/src/plugins/crypto_native/aes_cbc_neon.h @@ -0,0 +1,208 @@ +/* + *------------------------------------------------------------------ + * 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 __aarch64__ + +static_always_inline void +aes_cbc_dec (u8x16 * k, u8 * src, u8 * dst, u8 * iv, int count, int rounds) +{ + u8x16 r0, r1, r2, r3, c0, c1, c2, c3, f; + + f = vld1q_u8 (iv); + + while (count >= 64) + { + c0 = r0 = vld1q_u8 (src); + c1 = r1 = vld1q_u8 (src + 16); + c2 = r2 = vld1q_u8 (src + 32); + c3 = r3 = vld1q_u8 (src + 48); + for (int i = 0; i < rounds - 1; i++) + { + r0 = vaesimcq_u8 (vaesdq_u8 (r0, k[i])); + r1 = vaesimcq_u8 (vaesdq_u8 (r1, k[i])); + r2 = vaesimcq_u8 (vaesdq_u8 (r2, k[i])); + r3 = vaesimcq_u8 (vaesdq_u8 (r3, k[i])); + } + r0 = vaesdq_u8 (r0, k[rounds - 1]) ^ k[rounds]; + r1 = vaesdq_u8 (r1, k[rounds - 1]) ^ k[rounds]; + r2 = vaesdq_u8 (r2, k[rounds - 1]) ^ k[rounds]; + r3 = vaesdq_u8 (r3, k[rounds - 1]) ^ k[rounds]; + vst1q_u8 (dst, r0 ^ f); + vst1q_u8 (dst + 16, r1 ^ c0); + vst1q_u8 (dst + 32, r2 ^ c1); + vst1q_u8 (dst + 48, r3 ^ c2); + f = c3; + + src += 64; + dst += 64; + count -= 64; + } + + while (count >= 16) + { + c0 = r0 = vld1q_u8 (src); + for (int i = 0; i < rounds - 1; i++) + r0 = vaesimcq_u8 (vaesdq_u8 (r0, k[i])); + r0 = vaesdq_u8 (r0, k[rounds - 1]) ^ k[rounds]; + vst1q_u8 (dst, r0 ^ f); + f = c0; + + src += 16; + dst += 16; + count -= 16; + } +} + +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; + u32x4 dummy_mask = { }; + u32x4 len = { }; + vnet_crypto_key_index_t key_index[4]; + u8 *src[4] = { }; + u8 *dst[4] = { }; + u8x16 r[4] = { }; + u8x16 k[15][4] = { }; + + for (i = 0; i < 4; i++) + key_index[i] = ~0; + +more: + for (i = 0; i < 4; 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[i] = ptd->cbc_iv[i]; + vst1q_u8 (ops[0]->iv, r[i]); + ptd->cbc_iv[i] = vaeseq_u8 (r[i], r[i]); + } + else + r[i] = vld1q_u8 (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][i] = kd->encrypt_key[j]; + } + ops[0]->status = VNET_CRYPTO_OP_STATUS_COMPLETED; + n_left--; + ops++; + } + } + + count = u32x4_min_scalar (len); + + ASSERT (count % 16 == 0); + + for (i = 0; i < count; i += 16) + { + r[0] ^= vld1q_u8 (src[0] + i); + r[1] ^= vld1q_u8 (src[1] + i); + r[2] ^= vld1q_u8 (src[2] + i); + r[3] ^= vld1q_u8 (src[3] + i); + for (j = 0; j < rounds - 1; j++) + { + r[0] = vaesmcq_u8 (vaeseq_u8 (r[0], k[j][0])); + r[1] = vaesmcq_u8 (vaeseq_u8 (r[1], k[j][1])); + r[2] = vaesmcq_u8 (vaeseq_u8 (r[2], k[j][2])); + r[3] = vaesmcq_u8 (vaeseq_u8 (r[3], k[j][3])); + } + r[0] = vaeseq_u8 (r[0], k[j][0]) ^ k[rounds][0]; + r[1] = vaeseq_u8 (r[1], k[j][1]) ^ k[rounds][1]; + r[2] = vaeseq_u8 (r[2], k[j][2]) ^ k[rounds][2]; + r[3] = vaeseq_u8 (r[3], k[j][3]) ^ k[rounds][3]; + vst1q_u8 (dst[0] + i, r[0]); + vst1q_u8 (dst[1] + i, r[1]); + vst1q_u8 (dst[2] + i, r[2]); + vst1q_u8 (dst[3] + i, r[3]); + } + + for (i = 0; i < 4; i++) + { + src[i] += count; + dst[i] += count; + len[i] -= count; + } + + if (n_left > 0) + goto more; + + if (!u32x4_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: + aes_cbc_dec (kd->decrypt_key, op->src, op->dst, op->iv, op->len, rounds); + 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: + */ |