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/* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdlib.h>
#include <string.h>
#include <example_debug.h>
#include <odp_api.h>
#include <odp/helper/ipsec.h>
#include <odp_ipsec_cache.h>
/** Global pointer to ipsec_cache db */
ipsec_cache_t *ipsec_cache;
void init_ipsec_cache(void)
{
odp_shm_t shm;
shm = odp_shm_reserve("shm_ipsec_cache",
sizeof(ipsec_cache_t),
ODP_CACHE_LINE_SIZE,
0);
ipsec_cache = odp_shm_addr(shm);
if (ipsec_cache == NULL) {
EXAMPLE_ERR("Error: shared mem alloc failed.\n");
exit(EXIT_FAILURE);
}
memset(ipsec_cache, 0, sizeof(*ipsec_cache));
}
int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa,
sa_db_entry_t *auth_sa,
tun_db_entry_t *tun,
crypto_api_mode_e api_mode,
odp_bool_t in,
odp_queue_t completionq,
odp_pool_t out_pool)
{
odp_crypto_session_param_t params;
ipsec_cache_entry_t *entry;
odp_crypto_ses_create_err_t ses_create_rc;
odp_crypto_session_t session;
sa_mode_t mode = IPSEC_SA_MODE_TRANSPORT;
/* Verify we have a good entry */
entry = &ipsec_cache->array[ipsec_cache->index];
if (MAX_DB <= ipsec_cache->index)
return -1;
/* Verify SA mode match in case of cipher&auth */
if (cipher_sa && auth_sa &&
(cipher_sa->mode != auth_sa->mode))
return -1;
odp_crypto_session_param_init(¶ms);
/* Setup parameters and call crypto library to create session */
params.op = (in) ? ODP_CRYPTO_OP_DECODE : ODP_CRYPTO_OP_ENCODE;
params.auth_cipher_text = TRUE;
if (CRYPTO_API_SYNC == api_mode) {
params.pref_mode = ODP_CRYPTO_SYNC;
params.compl_queue = ODP_QUEUE_INVALID;
params.output_pool = ODP_POOL_INVALID;
} else {
params.pref_mode = ODP_CRYPTO_ASYNC;
params.compl_queue = completionq;
params.output_pool = out_pool;
}
if (CRYPTO_API_ASYNC_NEW_BUFFER == api_mode)
entry->in_place = FALSE;
else
entry->in_place = TRUE;
/* Cipher */
if (cipher_sa) {
params.cipher_alg = cipher_sa->alg.u.cipher;
params.cipher_key.data = cipher_sa->key.data;
params.cipher_key.length = cipher_sa->key.length;
params.iv.data = entry->state.iv;
params.iv.length = cipher_sa->iv_len;
mode = cipher_sa->mode;
} else {
params.cipher_alg = ODP_CIPHER_ALG_NULL;
params.iv.data = NULL;
params.iv.length = 0;
}
/* Auth */
if (auth_sa) {
params.auth_alg = auth_sa->alg.u.auth;
params.auth_key.data = auth_sa->key.data;
params.auth_key.length = auth_sa->key.length;
params.auth_digest_len = auth_sa->icv_len;
mode = auth_sa->mode;
} else {
params.auth_alg = ODP_AUTH_ALG_NULL;
}
/* Generate an IV */
if (params.iv.length) {
int32_t size = params.iv.length;
int32_t ret = odp_random_data(params.iv.data, size, 1);
if (ret != size)
return -1;
}
/* Synchronous session create for now */
if (odp_crypto_session_create(¶ms, &session, &ses_create_rc))
return -1;
if (ODP_CRYPTO_SES_CREATE_ERR_NONE != ses_create_rc)
return -1;
/* Copy remainder */
if (cipher_sa) {
entry->src_ip = cipher_sa->src_ip;
entry->dst_ip = cipher_sa->dst_ip;
entry->esp.alg = cipher_sa->alg.u.cipher;
entry->esp.spi = cipher_sa->spi;
entry->esp.block_len = cipher_sa->block_len;
entry->esp.iv_len = cipher_sa->iv_len;
memcpy(&entry->esp.key, &cipher_sa->key, sizeof(ipsec_key_t));
}
if (auth_sa) {
entry->src_ip = auth_sa->src_ip;
entry->dst_ip = auth_sa->dst_ip;
entry->ah.alg = auth_sa->alg.u.auth;
entry->ah.spi = auth_sa->spi;
entry->ah.icv_len = auth_sa->icv_len;
memcpy(&entry->ah.key, &auth_sa->key, sizeof(ipsec_key_t));
}
if (tun) {
entry->tun_src_ip = tun->tun_src_ip;
entry->tun_dst_ip = tun->tun_dst_ip;
mode = IPSEC_SA_MODE_TUNNEL;
int ret;
if (!in) {
/* init tun hdr id */
ret = odp_random_data((uint8_t *)
&entry->state.tun_hdr_id,
sizeof(entry->state.tun_hdr_id),
1);
if (ret != sizeof(entry->state.tun_hdr_id))
return -1;
}
}
entry->mode = mode;
/* Initialize state */
entry->state.esp_seq = 0;
entry->state.ah_seq = 0;
entry->state.session = session;
/* Add entry to the appropriate list */
ipsec_cache->index++;
if (in) {
entry->next = ipsec_cache->in_list;
ipsec_cache->in_list = entry;
} else {
entry->next = ipsec_cache->out_list;
ipsec_cache->out_list = entry;
}
return 0;
}
ipsec_cache_entry_t *find_ipsec_cache_entry_in(uint32_t src_ip,
uint32_t dst_ip,
odph_ahhdr_t *ah,
odph_esphdr_t *esp)
{
ipsec_cache_entry_t *entry = ipsec_cache->in_list;
/* Look for a hit */
for (; NULL != entry; entry = entry->next) {
if ((entry->src_ip != src_ip) || (entry->dst_ip != dst_ip))
if ((entry->tun_src_ip != src_ip) ||
(entry->tun_dst_ip != dst_ip))
continue;
if (ah &&
((!entry->ah.alg) ||
(entry->ah.spi != odp_be_to_cpu_32(ah->spi))))
continue;
if (esp &&
((!entry->esp.alg) ||
(entry->esp.spi != odp_be_to_cpu_32(esp->spi))))
continue;
break;
}
return entry;
}
ipsec_cache_entry_t *find_ipsec_cache_entry_out(uint32_t src_ip,
uint32_t dst_ip,
uint8_t proto EXAMPLE_UNUSED)
{
ipsec_cache_entry_t *entry = ipsec_cache->out_list;
/* Look for a hit */
for (; NULL != entry; entry = entry->next) {
if ((entry->src_ip == src_ip) && (entry->dst_ip == dst_ip))
break;
}
return entry;
}
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