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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 __included_ikev2_priv_h__
#define __included_ikev2_priv_h__
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <plugins/ikev2/ikev2.h>
#include <vppinfra/hash.h>
#include <vppinfra/elog.h>
#include <vppinfra/error.h>
#include <openssl/rand.h>
#include <openssl/dh.h>
#include <openssl/hmac.h>
#include <openssl/evp.h>
#define foreach_ikev2_log_level \
_(0x00, LOG_NONE) \
_(0x01, LOG_ERROR) \
_(0x02, LOG_WARNING) \
_(0x03, LOG_INFO) \
_(0x04, LOG_DEBUG) \
_(0x05, LOG_DETAIL) \
typedef enum ikev2_log_level_t_
{
#define _(n,f) IKEV2_##f = n,
foreach_ikev2_log_level
#undef _
IKEV2_LOG_MAX
} ikev2_log_level_t;
/* dataplane logging */
#define _ikev2_elog(_level, _msg) \
do { \
ikev2_main_t *km = &ikev2_main; \
if (PREDICT_FALSE (km->log_level >= _level)) \
{ \
ELOG_TYPE_DECLARE (e) = \
{ \
.format = "ikev2 " _msg, \
.format_args = "", \
}; \
ELOG_DATA (&vlib_global_main.elog_main, e); \
} \
} while (0)
#define ikev2_elog_sa_state(_format, _ispi) \
do { \
ikev2_main_t *km = &ikev2_main; \
if (PREDICT_FALSE (km->log_level >= IKEV2_LOG_DEBUG)) \
{ \
ELOG_TYPE_DECLARE (e) = \
{ \
.format = "ikev2: " _format, \
.format_args = "i8", \
}; \
CLIB_PACKED(struct \
{ \
u64 ispi; \
}) *ed; \
ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
ed->ispi = _ispi; \
} \
} while (0) \
#define ikev2_elog_exchange_internal(_format, _ispi, _rspi, _addr) \
do { \
ikev2_main_t *km = &ikev2_main; \
if (PREDICT_FALSE (km->log_level >= IKEV2_LOG_DEBUG)) \
{ \
ELOG_TYPE_DECLARE (e) = \
{ \
.format = "ikev2: " _format, \
.format_args = "i8i8i1i1i1i1", \
}; \
CLIB_PACKED(struct \
{ \
u64 ispi; \
u64 rspi; \
u8 oct1; \
u8 oct2; \
u8 oct3; \
u8 oct4; \
}) *ed; \
ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
ed->ispi = _ispi; \
ed->rspi = _rspi; \
ed->oct4 = (_addr) >> 24; \
ed->oct3 = (_addr) >> 16; \
ed->oct2 = (_addr) >> 8; \
ed->oct1 = (_addr); \
} \
} while (0) \
#define IKE_ELOG_IP4_FMT "%d.%d.%d.%d"
#define IKE_ELOG_IP6_FMT "[v6]:%x%x:%x%x"
#define ikev2_elog_exchange(_fmt, _ispi, _rspi, _addr, _v4) \
do { \
if (_v4) \
ikev2_elog_exchange_internal (_fmt IKE_ELOG_IP4_FMT, _ispi, _rspi, _addr);\
else \
ikev2_elog_exchange_internal (_fmt IKE_ELOG_IP6_FMT, _ispi, _rspi, _addr);\
} while (0)
#define ikev2_elog_uint(_level, _format, _val) \
do { \
ikev2_main_t *km = &ikev2_main; \
if (PREDICT_FALSE (km->log_level >= _level)) \
{ \
ELOG_TYPE_DECLARE (e) = \
{ \
.format = "ikev2: " _format, \
.format_args = "i8", \
}; \
CLIB_PACKED(struct \
{ \
u64 val; \
}) *ed; \
ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
ed->val = _val; \
} \
} while (0)
#define ikev2_elog_uint_peers(_level, _format, _val, _ip1, _ip2) \
do { \
ikev2_main_t *km = &ikev2_main; \
if (PREDICT_FALSE (km->log_level >= _level)) \
{ \
ELOG_TYPE_DECLARE (e) = \
{ \
.format = "ikev2: " _format, \
.format_args = "i8i1i1i1i1i1i1i1i1", \
}; \
CLIB_PACKED(struct { \
u64 val; \
u8 i11; u8 i12; u8 i13; u8 i14; \
u8 i21; u8 i22; u8 i23; u8 i24; }) *ed; \
ed = ELOG_DATA (&vlib_global_main.elog_main, e); \
ed->val = _val; \
ed->i14 = (_ip1) >> 24; \
ed->i13 = (_ip1) >> 16; \
ed->i12 = (_ip1) >> 8; \
ed->i11 = (_ip1); \
ed->i24 = (_ip2) >> 24; \
ed->i23 = (_ip2) >> 16; \
ed->i22 = (_ip2) >> 8; \
ed->i21 = (_ip2); \
} \
} while (0)
#define ikev2_elog_error(_msg) \
_ikev2_elog(IKEV2_LOG_ERROR, "[error] " _msg)
#define ikev2_elog_warning(_msg) \
_ikev2_elog(IKEV2_LOG_WARNING, "[warning] " _msg)
#define ikev2_elog_debug(_msg) \
_ikev2_elog(IKEV2_LOG_DEBUG, "[debug] " _msg)
#define ikev2_elog_detail(_msg) \
_ikev2_elog(IKEV2_LOG_DETAIL, "[detail] " _msg)
/* logging for main thread */
#define ikev2_log_error(...) \
vlib_log(VLIB_LOG_LEVEL_ERR, ikev2_main.log_class, __VA_ARGS__)
#define ikev2_log_warning(...) \
vlib_log(VLIB_LOG_LEVEL_WARNING, ikev2_main.log_class, __VA_ARGS__)
#define ikev2_log_debug(...) \
vlib_log(VLIB_LOG_LEVEL_DEBUG, ikev2_main.log_class, __VA_ARGS__)
typedef enum
{
IKEV2_STATE_UNKNOWN,
IKEV2_STATE_SA_INIT,
IKEV2_STATE_DELETED,
IKEV2_STATE_AUTH_FAILED,
IKEV2_STATE_AUTHENTICATED,
IKEV2_STATE_NOTIFY_AND_DELETE,
IKEV2_STATE_TS_UNACCEPTABLE,
IKEV2_STATE_NO_PROPOSAL_CHOSEN,
} ikev2_state_t;
typedef struct
{
ikev2_auth_method_t method:8;
u8 *data;
u8 hex; /* hex encoding of the shared secret */
EVP_PKEY *key;
} ikev2_auth_t;
typedef enum
{
IKEV2_DH_GROUP_MODP = 0,
IKEV2_DH_GROUP_ECP = 1,
} ikev2_dh_group_t;
typedef struct
{
ikev2_transform_type_t type;
union
{
u16 transform_id;
ikev2_transform_encr_type_t encr_type:16;
ikev2_transform_prf_type_t prf_type:16;
ikev2_transform_integ_type_t integ_type:16;
ikev2_transform_dh_type_t dh_type:16;
ikev2_transform_esn_type_t esn_type:16;
};
u8 *attrs;
u16 key_len;
u16 key_trunc;
u16 block_size;
u8 dh_group;
int nid;
const char *dh_p;
const char *dh_g;
const void *md;
const void *cipher;
} ikev2_sa_transform_t;
typedef struct
{
u8 proposal_num;
ikev2_protocol_id_t protocol_id:8;
u32 spi;
ikev2_sa_transform_t *transforms;
} ikev2_sa_proposal_t;
typedef struct
{
ikev2_traffic_selector_type_t ts_type;
u8 protocol_id;
u16 selector_len;
u16 start_port;
u16 end_port;
ip_address_t start_addr;
ip_address_t end_addr;
} ikev2_ts_t;
typedef struct
{
u32 sw_if_index;
ip_address_t addr;
u8 *hostname;
u8 is_resolved;
} ikev2_responder_t;
typedef struct
{
ikev2_transform_encr_type_t crypto_alg;
ikev2_transform_integ_type_t integ_alg;
ikev2_transform_dh_type_t dh_type;
u32 crypto_key_size;
} ikev2_transforms_set;
typedef struct
{
ikev2_id_type_t type:8;
u8 *data;
} ikev2_id_t;
typedef struct
{
/* sa proposals vectors */
ikev2_sa_proposal_t *i_proposals;
ikev2_sa_proposal_t *r_proposals;
/* Traffic Selectors */
ikev2_ts_t *tsi;
ikev2_ts_t *tsr;
/* keys */
u8 *sk_ai;
u8 *sk_ar;
u8 *sk_ei;
u8 *sk_er;
u32 salt_ei;
u32 salt_er;
/* installed data */
u32 local_sa_id;
u32 remote_sa_id;
/* lifetime data */
f64 time_to_expiration;
u8 is_expired;
i8 rekey_retries;
} ikev2_child_sa_t;
typedef struct
{
u8 protocol_id;
u32 spi; /*for ESP and AH SPI size is 4, for IKE size is 0 */
} ikev2_delete_t;
typedef struct
{
u8 protocol_id;
u32 spi;
u32 ispi;
ikev2_sa_proposal_t *i_proposal;
ikev2_sa_proposal_t *r_proposal;
ikev2_ts_t *tsi;
ikev2_ts_t *tsr;
} ikev2_rekey_t;
typedef struct
{
u16 msg_type;
u8 protocol_id;
u32 spi;
u8 *data;
} ikev2_notify_t;
typedef struct
{
u8 *name;
ikev2_auth_t auth;
ikev2_id_t loc_id;
ikev2_id_t rem_id;
ikev2_ts_t loc_ts;
ikev2_ts_t rem_ts;
ikev2_responder_t responder;
ikev2_transforms_set ike_ts;
ikev2_transforms_set esp_ts;
u64 lifetime;
u64 lifetime_maxdata;
u32 lifetime_jitter;
u32 handover;
u16 ipsec_over_udp_port;
u32 tun_itf;
u8 udp_encap;
u8 natt_disabled;
} ikev2_profile_t;
typedef enum
{
/* SA will switch to port 4500 when NAT is detected.
* This is the default. */
IKEV2_NATT_ENABLED,
/* Do nothing when NAT is detected */
IKEV2_NATT_DISABLED,
/* NAT was detected and port switched to 4500 */
IKEV2_NATT_ACTIVE,
} ikev2_natt_state_t;
#define ikev2_natt_active(_sa) ((_sa)->natt_state == IKEV2_NATT_ACTIVE)
typedef struct
{
u16 n_keepalives;
u16 n_rekey_req;
u16 n_sa_auth_req;
u16 n_sa_init_req;
u16 n_init_retransmit;
u16 n_retransmit;
} ikev2_stats_t;
typedef struct
{
ikev2_state_t state;
u8 unsupported_cp;
u8 initial_contact;
ip_address_t iaddr;
ip_address_t raddr;
u64 ispi;
u64 rspi;
u8 *i_nonce;
u8 *r_nonce;
/* DH data */
u16 dh_group;
u8 *dh_shared_key;
u8 *dh_private_key;
u8 *i_dh_data;
u8 *r_dh_data;
/* sa proposals vectors */
ikev2_sa_proposal_t *i_proposals;
ikev2_sa_proposal_t *r_proposals;
/* keys */
u8 *sk_d;
u8 *sk_ai;
u8 *sk_ar;
u8 *sk_ei;
u8 *sk_er;
u8 *sk_pi;
u8 *sk_pr;
/* auth */
ikev2_auth_t i_auth;
ikev2_auth_t r_auth;
/* ID */
ikev2_id_t i_id;
ikev2_id_t r_id;
/* pending deletes */
ikev2_delete_t *del;
/* pending rekeyings */
ikev2_rekey_t *rekey;
ikev2_rekey_t *new_child;
/* packet data */
u8 *last_sa_init_req_packet_data;
u8 *last_sa_init_res_packet_data;
/* retransmit */
/* message id expected in the request from the other peer */
u32 last_msg_id;
u8 *last_res_packet_data;
u8 is_initiator;
/* last message id that was used for an initiated request */
u32 last_init_msg_id;
u32 profile_index;
u8 is_tun_itf_set;
u32 tun_itf;
u8 udp_encap;
u16 ipsec_over_udp_port;
f64 old_id_expiration;
u32 current_remote_id_mask;
u32 old_remote_id;
u8 old_remote_id_present;
u8 init_response_received;
ikev2_child_sa_t *childs;
u8 liveness_retries;
f64 liveness_period_check;
u16 dst_port;
u32 sw_if_index;
/* is NAT traversal mode */
ikev2_natt_state_t natt_state;
u8 keys_generated;
ikev2_stats_t stats;
} ikev2_sa_t;
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
/* pool of IKEv2 Security Associations */
ikev2_sa_t *sas;
/* hash */
uword *sa_by_rspi;
EVP_CIPHER_CTX *evp_ctx;
HMAC_CTX *hmac_ctx;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
HMAC_CTX _hmac_ctx;
EVP_CIPHER_CTX _evp_ctx;
#endif
} ikev2_main_per_thread_data_t;
typedef struct
{
/* pool of IKEv2 profiles */
ikev2_profile_t *profiles;
/* vector of supported transform types */
ikev2_sa_transform_t *supported_transforms;
/* hash */
mhash_t profile_index_by_name;
/* local private key */
EVP_PKEY *pkey;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
/* pool of IKEv2 Security Associations created in initiator mode */
ikev2_sa_t *sais;
/* hash */
uword *sa_by_ispi;
ikev2_main_per_thread_data_t *per_thread_data;
/* interface indices managed by IKE */
uword *sw_if_indices;
/* API message ID base */
u16 msg_id_base;
/* log class used for main thread */
vlib_log_class_t log_class;
/* logging level */
ikev2_log_level_t log_level;
/* how often a liveness check will be performed */
u32 liveness_period;
/* max number of retries before considering peer dead */
u32 liveness_max_retries;
/* dead peer detection */
u8 dpd_disabled;
/* pointer to name resolver function in dns plugin */
int (*dns_resolve_name) ();
} ikev2_main_t;
extern ikev2_main_t ikev2_main;
void ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v);
ikev2_sa_transform_t *ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
ikev2_transform_type_t type);
/* ikev2_crypto.c */
v8 *ikev2_calc_prf (ikev2_sa_transform_t * tr, v8 * key, v8 * data);
u8 *ikev2_calc_prfplus (ikev2_sa_transform_t * tr, u8 * key, u8 * seed,
int len);
v8 *ikev2_calc_integr (ikev2_sa_transform_t * tr, v8 * key, u8 * data,
int len);
int ikev2_decrypt_data (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa,
ikev2_sa_transform_t * tr_encr, u8 * data, int len,
u32 * out_len);
int ikev2_encrypt_data (ikev2_main_per_thread_data_t * ptd, ikev2_sa_t * sa,
ikev2_sa_transform_t * tr_encr, v8 * src, u8 * dst);
int ikev2_encrypt_aead_data (ikev2_main_per_thread_data_t * ptd,
ikev2_sa_t * sa, ikev2_sa_transform_t * tr_encr,
v8 * src, u8 * dst, u8 * aad,
u32 aad_len, u8 * tag);
int ikev2_decrypt_aead_data (ikev2_main_per_thread_data_t * ptd,
ikev2_sa_t * sa, ikev2_sa_transform_t * tr_encr,
u8 * data, int data_len, u8 * aad, u32 aad_len,
u8 * tag, u32 * out_len);
void ikev2_generate_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
void ikev2_complete_dh (ikev2_sa_t * sa, ikev2_sa_transform_t * t);
int ikev2_verify_sign (EVP_PKEY * pkey, u8 * sigbuf, u8 * data);
u8 *ikev2_calc_sign (EVP_PKEY * pkey, u8 * data);
EVP_PKEY *ikev2_load_cert_file (u8 * file);
EVP_PKEY *ikev2_load_key_file (u8 * file);
void ikev2_crypto_init (ikev2_main_t * km);
/* ikev2_payload.c */
typedef struct
{
u8 first_payload_type;
u16 last_hdr_off;
u8 *data;
} ikev2_payload_chain_t;
#define ikev2_payload_new_chain(V) vec_validate (V, 0)
#define ikev2_payload_destroy_chain(V) do { \
vec_free((V)->data); \
vec_free(V); \
} while (0)
void ikev2_payload_add_notify (ikev2_payload_chain_t * c, u16 msg_type,
u8 * data);
void ikev2_payload_add_notify_2 (ikev2_payload_chain_t * c, u16 msg_type,
u8 * data, ikev2_notify_t * notify);
void ikev2_payload_add_sa (ikev2_payload_chain_t * c,
ikev2_sa_proposal_t * proposals);
void ikev2_payload_add_ke (ikev2_payload_chain_t * c, u16 dh_group,
u8 * dh_data);
void ikev2_payload_add_nonce (ikev2_payload_chain_t * c, u8 * nonce);
void ikev2_payload_add_id (ikev2_payload_chain_t * c, ikev2_id_t * id,
u8 type);
void ikev2_payload_add_auth (ikev2_payload_chain_t * c, ikev2_auth_t * auth);
void ikev2_payload_add_ts (ikev2_payload_chain_t * c, ikev2_ts_t * ts,
u8 type);
void ikev2_payload_add_delete (ikev2_payload_chain_t * c, ikev2_delete_t * d);
void ikev2_payload_chain_add_padding (ikev2_payload_chain_t * c, int bs);
void ikev2_parse_vendor_payload (ike_payload_header_t * ikep);
ikev2_sa_proposal_t *ikev2_parse_sa_payload (ike_payload_header_t * ikep,
u32 rlen);
ikev2_ts_t *ikev2_parse_ts_payload (ike_payload_header_t * ikep, u32 rlen);
ikev2_delete_t *ikev2_parse_delete_payload (ike_payload_header_t * ikep,
u32 rlen);
ikev2_notify_t *ikev2_parse_notify_payload (ike_payload_header_t * ikep,
u32 rlen);
int ikev2_set_log_level (ikev2_log_level_t log_level);
u8 *ikev2_find_ike_notify_payload (ike_header_t * ike, u32 msg_type);
void ikev2_disable_dpd (void);
clib_error_t *ikev2_profile_natt_disable (u8 * name);
static_always_inline ikev2_main_per_thread_data_t *
ikev2_get_per_thread_data ()
{
u32 thread_index = vlib_get_thread_index ();
return vec_elt_at_index (ikev2_main.per_thread_data, thread_index);
}
#endif /* __included_ikev2_priv_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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