2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/devices/dpdk/dpdk.h>
19 #include <openssl/hmac.h>
20 #include <openssl/rand.h>
21 #include <openssl/evp.h>
34 typedef CLIB_PACKED (struct {
37 }) ip4_and_esp_header_t;
39 typedef CLIB_PACKED (struct {
42 }) ip6_and_esp_header_t;
45 const EVP_CIPHER * type;
54 CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
55 EVP_CIPHER_CTX encrypt_ctx;
56 CLIB_CACHE_LINE_ALIGN_MARK(cacheline1);
57 EVP_CIPHER_CTX decrypt_ctx;
58 CLIB_CACHE_LINE_ALIGN_MARK(cacheline2);
60 ipsec_crypto_alg_t last_encrypt_alg;
61 ipsec_crypto_alg_t last_decrypt_alg;
62 ipsec_integ_alg_t last_integ_alg;
63 } esp_main_per_thread_data_t;
66 esp_crypto_alg_t * esp_crypto_algs;
67 esp_integ_alg_t * esp_integ_algs;
68 esp_main_per_thread_data_t * per_thread_data;
76 esp_main_t * em = &esp_main;
77 vlib_thread_main_t * tm = vlib_get_thread_main();
79 memset (em, 0, sizeof (em[0]));
81 vec_validate(em->esp_crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
82 em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].type = EVP_aes_128_cbc();
83 em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].type = EVP_aes_192_cbc();
84 em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].type = EVP_aes_256_cbc();
86 vec_validate(em->esp_integ_algs, IPSEC_INTEG_N_ALG - 1);
89 i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA1_96];
93 i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
97 i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
101 i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
102 i->md = EVP_sha384();
105 i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
106 i->md = EVP_sha512();
109 vec_validate_aligned(em->per_thread_data, tm->n_vlib_mains-1, CLIB_CACHE_LINE_BYTES);
112 for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
114 EVP_CIPHER_CTX_init(&(em->per_thread_data[thread_id].encrypt_ctx));
115 EVP_CIPHER_CTX_init(&(em->per_thread_data[thread_id].decrypt_ctx));
116 HMAC_CTX_init(&(em->per_thread_data[thread_id].hmac_ctx));
120 always_inline unsigned int
121 hmac_calc(ipsec_integ_alg_t alg,
130 esp_main_t * em = &esp_main;
131 u32 cpu_index = os_get_cpu_number();
132 HMAC_CTX * ctx = &(em->per_thread_data[cpu_index].hmac_ctx);
133 const EVP_MD * md = NULL;
136 ASSERT(alg < IPSEC_INTEG_N_ALG);
138 if (PREDICT_FALSE(em->esp_integ_algs[alg].md == 0))
141 if (PREDICT_FALSE(alg != em->per_thread_data[cpu_index].last_integ_alg)) {
142 md = em->esp_integ_algs[alg].md;
143 em->per_thread_data[cpu_index].last_integ_alg = alg;
146 HMAC_Init(ctx, key, key_len, md);
148 HMAC_Update(ctx, data, data_len);
150 if (PREDICT_TRUE(use_esn))
151 HMAC_Update(ctx, (u8 *) &seq_hi, sizeof(seq_hi));
152 HMAC_Final(ctx, signature, &len);
154 return em->esp_integ_algs[alg].trunc_size;