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/*
* Copyright (c) 2015 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.
*/
#ifndef __IPSEC_H__
#define __IPSEC_H__
#include <vnet/ip/ip.h>
#include <vnet/feature/feature.h>
#include <openssl/hmac.h>
#include <openssl/rand.h>
#include <openssl/evp.h>
#include <vppinfra/types.h>
#include <vppinfra/cache.h>
#include <vnet/ipsec/ipsec_spd.h>
#include <vnet/ipsec/ipsec_spd_policy.h>
#include <vnet/ipsec/ipsec_sa.h>
#include <vnet/ipsec/ipsec_if.h>
typedef clib_error_t *(*add_del_sa_sess_cb_t) (u32 sa_index, u8 is_add);
typedef clib_error_t *(*check_support_cb_t) (ipsec_sa_t * sa);
typedef struct
{
u8 *name;
/* add/del callback */
add_del_sa_sess_cb_t add_del_sa_sess_cb;
/* check support function */
check_support_cb_t check_support_cb;
u32 ah4_encrypt_node_index;
u32 ah4_decrypt_node_index;
u32 ah4_encrypt_next_index;
u32 ah4_decrypt_next_index;
u32 ah6_encrypt_node_index;
u32 ah6_decrypt_node_index;
u32 ah6_encrypt_next_index;
u32 ah6_decrypt_next_index;
} ipsec_ah_backend_t;
typedef struct
{
u8 *name;
/* add/del callback */
add_del_sa_sess_cb_t add_del_sa_sess_cb;
/* check support function */
check_support_cb_t check_support_cb;
u32 esp4_encrypt_node_index;
u32 esp4_decrypt_node_index;
u32 esp4_encrypt_next_index;
u32 esp4_decrypt_next_index;
u32 esp6_encrypt_node_index;
u32 esp6_decrypt_node_index;
u32 esp6_encrypt_next_index;
u32 esp6_decrypt_next_index;
} ipsec_esp_backend_t;
typedef struct
{
const EVP_CIPHER *type;
u8 iv_size;
u8 block_size;
} ipsec_proto_main_crypto_alg_t;
typedef struct
{
const EVP_MD *md;
u8 trunc_size;
} ipsec_proto_main_integ_alg_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
EVP_CIPHER_CTX *encrypt_ctx;
#else
EVP_CIPHER_CTX encrypt_ctx;
#endif
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
EVP_CIPHER_CTX *decrypt_ctx;
#else
EVP_CIPHER_CTX decrypt_ctx;
#endif
CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
HMAC_CTX *hmac_ctx;
#else
HMAC_CTX hmac_ctx;
#endif
ipsec_crypto_alg_t last_encrypt_alg;
ipsec_crypto_alg_t last_decrypt_alg;
ipsec_integ_alg_t last_integ_alg;
} ipsec_proto_main_per_thread_data_t;
typedef struct
{
ipsec_proto_main_crypto_alg_t *ipsec_proto_main_crypto_algs;
ipsec_proto_main_integ_alg_t *ipsec_proto_main_integ_algs;
ipsec_proto_main_per_thread_data_t *per_thread_data;
} ipsec_proto_main_t;
extern ipsec_proto_main_t ipsec_proto_main;
typedef struct
{
/* pool of tunnel instances */
ipsec_spd_t *spds;
/* Pool of security associations */
ipsec_sa_t *sad;
/* pool of policies */
ipsec_policy_t *policies;
/* pool of tunnel interfaces */
ipsec_tunnel_if_t *tunnel_interfaces;
uword *tunnel_index_by_key;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
/* hashes */
uword *spd_index_by_spd_id;
uword *spd_index_by_sw_if_index;
uword *sa_index_by_sa_id;
uword *ipsec_if_pool_index_by_key;
uword *ipsec_if_real_dev_by_show_dev;
/* node indices */
u32 error_drop_node_index;
u32 esp4_encrypt_node_index;
u32 esp4_decrypt_node_index;
u32 ah4_encrypt_node_index;
u32 ah4_decrypt_node_index;
u32 esp6_encrypt_node_index;
u32 esp6_decrypt_node_index;
u32 ah6_encrypt_node_index;
u32 ah6_decrypt_node_index;
/* next node indices */
u32 esp4_encrypt_next_index;
u32 esp4_decrypt_next_index;
u32 ah4_encrypt_next_index;
u32 ah4_decrypt_next_index;
u32 esp6_encrypt_next_index;
u32 esp6_decrypt_next_index;
u32 ah6_encrypt_next_index;
u32 ah6_decrypt_next_index;
/* pool of ah backends */
ipsec_ah_backend_t *ah_backends;
/* pool of esp backends */
ipsec_esp_backend_t *esp_backends;
/* index of current ah backend */
u32 ah_current_backend;
/* index of current esp backend */
u32 esp_current_backend;
/* index of default ah backend */
u32 ah_default_backend;
/* index of default esp backend */
u32 esp_default_backend;
} ipsec_main_t;
extern ipsec_main_t ipsec_main;
clib_error_t *ipsec_add_del_sa_sess_cb (ipsec_main_t * im, u32 sa_index,
u8 is_add);
clib_error_t *ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa);
extern vlib_node_registration_t esp4_encrypt_node;
extern vlib_node_registration_t esp4_decrypt_node;
extern vlib_node_registration_t ah4_encrypt_node;
extern vlib_node_registration_t ah4_decrypt_node;
extern vlib_node_registration_t esp6_encrypt_node;
extern vlib_node_registration_t esp6_decrypt_node;
extern vlib_node_registration_t ah6_encrypt_node;
extern vlib_node_registration_t ah6_decrypt_node;
extern vlib_node_registration_t ipsec_if_input_node;
/*
* functions
*/
u8 *format_ipsec_replay_window (u8 * s, va_list * args);
/*
* inline functions
*/
static_always_inline u32
get_next_output_feature_node_index (vlib_buffer_t * b,
vlib_node_runtime_t * nr)
{
u32 next;
vlib_main_t *vm = vlib_get_main ();
vlib_node_t *node = vlib_get_node (vm, nr->node_index);
vnet_feature_next (&next, b);
return node->next_nodes[next];
}
u32 ipsec_register_ah_backend (vlib_main_t * vm, ipsec_main_t * im,
const char *name,
const char *ah4_encrypt_node_name,
const char *ah4_decrypt_node_name,
const char *ah6_encrypt_node_name,
const char *ah6_decrypt_node_name,
check_support_cb_t ah_check_support_cb,
add_del_sa_sess_cb_t ah_add_del_sa_sess_cb);
u32 ipsec_register_esp_backend (vlib_main_t * vm, ipsec_main_t * im,
const char *name,
const char *esp4_encrypt_node_name,
const char *esp4_decrypt_node_name,
const char *esp6_encrypt_node_name,
const char *esp6_decrypt_node_name,
check_support_cb_t esp_check_support_cb,
add_del_sa_sess_cb_t esp_add_del_sa_sess_cb);
int ipsec_select_ah_backend (ipsec_main_t * im, u32 ah_backend_idx);
int ipsec_select_esp_backend (ipsec_main_t * im, u32 esp_backend_idx);
#endif /* __IPSEC_H__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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