diff options
Diffstat (limited to 'vnet/vnet/ipsec/ipsec.c')
| -rw-r--r-- | vnet/vnet/ipsec/ipsec.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/vnet/vnet/ipsec/ipsec.c b/vnet/vnet/ipsec/ipsec.c new file mode 100644 index 00000000000..c6a83557ce1 --- /dev/null +++ b/vnet/vnet/ipsec/ipsec.c @@ -0,0 +1,535 @@ +/* + * decap.c : IPSec tunnel support + * + * 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. + */ + +#include <vnet/vnet.h> +#include <vnet/api_errno.h> +#include <vnet/ip/ip.h> +#include <vnet/interface.h> + +#include <vnet/ipsec/ipsec.h> +#include <vnet/ipsec/esp.h> +#include <vnet/ipsec/ikev2.h> + +int +ipsec_set_interface_spd(vlib_main_t * vm, u32 sw_if_index, u32 spd_id, int is_add) +{ + ipsec_main_t *im = &ipsec_main; + ip_lookup_main_t * lm; + ip_config_main_t * rx_cm; + ip4_ipsec_config_t config; + + u32 spd_index, ci; + uword *p; + + p = hash_get (im->spd_index_by_spd_id, spd_id); + if (!p) + return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such spd-id */ + + spd_index = p[0]; + + p = hash_get (im->spd_index_by_sw_if_index, sw_if_index); + if (p && is_add) + return VNET_API_ERROR_SYSCALL_ERROR_1; /* spd already assigned */ + + if (is_add) + { + hash_set (im->spd_index_by_sw_if_index, sw_if_index, spd_index); + } + else + { + hash_unset (im->spd_index_by_sw_if_index, sw_if_index); + } + + clib_warning("sw_if_index %u spd_id %u spd_index %u", + sw_if_index, spd_id, spd_index); + + /* enable IPsec on TX */ + vnet_interface_add_del_feature(im->vnet_main, vm, sw_if_index, + INTF_OUTPUT_FEAT_IPSEC, is_add); + + /* enable IPsec on RX */ + config.spd_index = spd_index; + + /* IPv4 */ + lm = &ip4_main.lookup_main; + rx_cm = &lm->rx_config_mains[VNET_UNICAST]; + + ci = rx_cm->config_index_by_sw_if_index[sw_if_index]; + + ci = (is_add ? vnet_config_add_feature : vnet_config_del_feature) + (vm, &rx_cm->config_main, + ci, + IP4_RX_FEATURE_IPSEC, + &config, + sizeof (config)); + rx_cm->config_index_by_sw_if_index[sw_if_index] = ci; + + /* IPv6 */ + lm = &ip6_main.lookup_main; + rx_cm = &lm->rx_config_mains[VNET_UNICAST]; + + ci = rx_cm->config_index_by_sw_if_index[sw_if_index]; + + ci = (is_add ? vnet_config_add_feature : vnet_config_del_feature) + (vm, &rx_cm->config_main, + ci, + IP6_RX_FEATURE_IPSEC, + &config, + sizeof (config)); + rx_cm->config_index_by_sw_if_index[sw_if_index] = ci; + + return 0; +} + +int +ipsec_add_del_spd(vlib_main_t * vm, u32 spd_id, int is_add) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_spd_t * spd = 0; + uword *p; + u32 spd_index, k, v; + + p = hash_get (im->spd_index_by_spd_id, spd_id); + if (p && is_add) + return VNET_API_ERROR_INVALID_VALUE; + if (!p && !is_add) + return VNET_API_ERROR_INVALID_VALUE; + + if (!is_add) /* delete */ + { + spd_index = p[0]; + spd = pool_elt_at_index(im->spds, spd_index); + if (!spd) + return VNET_API_ERROR_INVALID_VALUE; + hash_foreach (k, v, im->spd_index_by_sw_if_index, ({ + if (v == spd_index) + ipsec_set_interface_spd(vm, k, spd_id, 0); + })); + hash_unset (im->spd_index_by_spd_id, spd_id); + pool_free (spd->policies); + vec_free (spd->ipv4_outbound_policies); + vec_free (spd->ipv6_outbound_policies); + vec_free (spd->ipv4_inbound_protect_policy_indices); + vec_free (spd->ipv4_inbound_policy_discard_and_bypass_indices); + pool_put (im->spds, spd); + } + else /* create new SPD */ + { + pool_get (im->spds, spd); + memset (spd, 0, sizeof (*spd)); + spd_index = spd - im->spds; + spd->id = spd_id; + hash_set (im->spd_index_by_spd_id, spd_id, spd_index); + } + return 0; +} + +static int +ipsec_spd_entry_sort(void * a1, void * a2) +{ + ipsec_main_t *im = &ipsec_main; + u32 * id1 = a1; + u32 * id2 = a2; + ipsec_spd_t * spd; + ipsec_policy_t * p1, * p2; + + pool_foreach (spd, im->spds, ({ + p1 = pool_elt_at_index(spd->policies, *id1); + p2 = pool_elt_at_index(spd->policies, *id2); + if (p1 && p2) + return p2->priority - p1->priority; + })); + + return 0; +} + +int +ipsec_add_del_policy(vlib_main_t * vm, ipsec_policy_t * policy, int is_add) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_spd_t * spd = 0; + ipsec_policy_t * vp; + uword *p; + u32 spd_index; + + clib_warning("policy-id %u priority %d is_outbound %u",policy->id, policy->priority, policy->is_outbound); + + if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) + { + p = hash_get(im->sa_index_by_sa_id, policy->sa_id); + if (!p) + return VNET_API_ERROR_SYSCALL_ERROR_1; + policy->sa_index = p[0]; + } + + p = hash_get (im->spd_index_by_spd_id, policy->id); + + if (!p) + return VNET_API_ERROR_SYSCALL_ERROR_1; + + spd_index = p[0]; + spd = pool_elt_at_index(im->spds, spd_index); + if (!spd) + return VNET_API_ERROR_SYSCALL_ERROR_1; + + if (is_add) + { + u32 policy_index; + + pool_get (spd->policies, vp); + memcpy (vp, policy, sizeof (*vp)); + policy_index = vp - spd->policies; + + if (policy->is_outbound) + { + if (policy->is_ipv6) + { + vec_add1 (spd->ipv6_outbound_policies, policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function (spd->ipv6_outbound_policies, + ipsec_spd_entry_sort); + } + else + { + vec_add1 (spd->ipv4_outbound_policies, policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function (spd->ipv4_outbound_policies, + ipsec_spd_entry_sort); + } + } + else + { + if (policy->is_ipv6) + { + if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) + { + vec_add1 (spd->ipv6_inbound_protect_policy_indices, + policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function ( + spd->ipv6_inbound_protect_policy_indices, + ipsec_spd_entry_sort); + } + else + { + vec_add1 (spd->ipv6_inbound_policy_discard_and_bypass_indices, + policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function ( + spd->ipv6_inbound_policy_discard_and_bypass_indices, + ipsec_spd_entry_sort); + } + } + else + { + if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) + { + vec_add1 (spd->ipv4_inbound_protect_policy_indices, + policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function ( + spd->ipv4_inbound_protect_policy_indices, + ipsec_spd_entry_sort); + } + else + { + vec_add1 (spd->ipv4_inbound_policy_discard_and_bypass_indices, + policy_index); + memcpy(vp, policy, sizeof(ipsec_policy_t)); + vec_sort_with_function ( + spd->ipv4_inbound_policy_discard_and_bypass_indices, + ipsec_spd_entry_sort); + } + } + } + + } + else + { + u32 i, j; + pool_foreach_index(i, spd->policies, ({ + vp = pool_elt_at_index(spd->policies, i); + if (vp->priority != policy->priority) + continue; + if (vp->is_outbound != policy->is_outbound) + continue; + if (vp->policy != policy->policy) + continue; + if (vp->sa_id != policy->sa_id) + continue; + if (vp->protocol != policy->protocol) + continue; + if (vp->lport.start != policy->lport.start) + continue; + if (vp->lport.stop != policy->lport.stop) + continue; + if (vp->rport.start != policy->rport.start) + continue; + if (vp->rport.stop != policy->rport.stop) + continue; + if (vp->is_ipv6 != policy->is_ipv6) + continue; + if (policy->is_ipv6) + { + if (vp->laddr.start.ip6.as_u64[0] != policy->laddr.start.ip6.as_u64[0]) + continue; + if (vp->laddr.start.ip6.as_u64[1] != policy->laddr.start.ip6.as_u64[1]) + continue; + if (vp->laddr.stop.ip6.as_u64[0] != policy->laddr.stop.ip6.as_u64[0]) + continue; + if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1]) + continue; + if (vp->raddr.start.ip6.as_u64[0] != policy->raddr.start.ip6.as_u64[0]) + continue; + if (vp->raddr.start.ip6.as_u64[1] != policy->raddr.start.ip6.as_u64[1]) + continue; + if (vp->raddr.stop.ip6.as_u64[0] != policy->raddr.stop.ip6.as_u64[0]) + continue; + if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1]) + continue; + if (policy->is_outbound) + { + vec_foreach_index(j, spd->ipv6_outbound_policies) { + if (vec_elt(spd->ipv6_outbound_policies, j) == i) { + vec_del1 (spd->ipv6_outbound_policies, j); + break; + } + } + } + else + { + if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) + { + vec_foreach_index(j, spd->ipv6_inbound_protect_policy_indices) { + if (vec_elt(spd->ipv6_inbound_protect_policy_indices, j) == i) { + vec_del1 (spd->ipv6_inbound_protect_policy_indices, j); + break; + } + } + } + else + { + vec_foreach_index(j, spd->ipv6_inbound_policy_discard_and_bypass_indices) { + if (vec_elt(spd->ipv6_inbound_policy_discard_and_bypass_indices, j) == i) { + vec_del1 (spd->ipv6_inbound_policy_discard_and_bypass_indices, j); + break; + } + } + } + } + } + else + { + if (vp->laddr.start.ip4.as_u32 != policy->laddr.start.ip4.as_u32) + continue; + if (vp->laddr.stop.ip4.as_u32 != policy->laddr.stop.ip4.as_u32) + continue; + if (vp->raddr.start.ip4.as_u32 != policy->raddr.start.ip4.as_u32) + continue; + if (vp->raddr.stop.ip4.as_u32 != policy->raddr.stop.ip4.as_u32) + continue; + if (policy->is_outbound) + { + vec_foreach_index(j, spd->ipv4_outbound_policies) { + if (vec_elt(spd->ipv4_outbound_policies, j) == i) { + vec_del1 (spd->ipv4_outbound_policies, j); + break; + } + } + } + else + { + if (policy->policy == IPSEC_POLICY_ACTION_PROTECT) + { + vec_foreach_index(j, spd->ipv4_inbound_protect_policy_indices) { + if (vec_elt(spd->ipv4_inbound_protect_policy_indices, j) == i) { + vec_del1 (spd->ipv4_inbound_protect_policy_indices, j); + break; + } + } + } + else + { + vec_foreach_index(j, spd->ipv4_inbound_policy_discard_and_bypass_indices) { + if (vec_elt(spd->ipv4_inbound_policy_discard_and_bypass_indices, j) == i) { + vec_del1 (spd->ipv4_inbound_policy_discard_and_bypass_indices, j); + break; + } + } + } + } + pool_put (spd->policies, vp); + break; + } + })); + } + + return 0; +} + +static u8 +ipsec_is_sa_used(u32 sa_index) +{ + ipsec_main_t * im = &ipsec_main; + ipsec_spd_t * spd; + ipsec_policy_t * p; + + pool_foreach(spd, im->spds, ({ + pool_foreach(p, spd->policies, ({ + if (p->policy == IPSEC_POLICY_ACTION_PROTECT) + { + if (p->sa_index == sa_index) + return 1; + } + })); + })); + + return 0; +} + +int +ipsec_add_del_sa(vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_sa_t * sa = 0; + uword *p; + u32 sa_index; + + clib_warning("id %u spi %u", new_sa->id, new_sa->spi); + + p = hash_get (im->sa_index_by_sa_id, new_sa->id); + if (p && is_add) + return VNET_API_ERROR_SYSCALL_ERROR_1; /* already exists */ + if (!p && !is_add) + return VNET_API_ERROR_SYSCALL_ERROR_1; + + if (!is_add) /* delete */ + { + sa_index = p[0]; + sa = pool_elt_at_index(im->sad, sa_index); + if (ipsec_is_sa_used(sa_index)) + { + clib_warning("sa_id %u used in policy", sa->id); + return VNET_API_ERROR_SYSCALL_ERROR_1; /* sa used in policy */ + } + hash_unset (im->sa_index_by_sa_id, sa->id); + pool_put (im->sad, sa); + } + else /* create new SA */ + { + pool_get (im->sad, sa); + memcpy (sa, new_sa, sizeof (*sa)); + sa_index = sa - im->sad; + hash_set (im->sa_index_by_sa_id, sa->id, sa_index); + } + return 0; +} + +int +ipsec_set_sa_key(vlib_main_t * vm, ipsec_sa_t * sa_update) +{ + ipsec_main_t *im = &ipsec_main; + uword *p; + u32 sa_index; + ipsec_sa_t * sa = 0; + + p = hash_get (im->sa_index_by_sa_id, sa_update->id); + if (!p) + return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */ + + sa_index = p[0]; + sa = pool_elt_at_index(im->sad, sa_index); + + /* new crypto key */ + if (0 < sa_update->crypto_key_len) + { + memcpy(sa->crypto_key, sa_update->crypto_key, sa_update->crypto_key_len); + sa->crypto_key_len = sa_update->crypto_key_len; + } + + /* new integ key */ + if (0 < sa_update->integ_key_len) + { + memcpy(sa->integ_key, sa_update->integ_key, sa_update->integ_key_len); + sa->integ_key_len = sa_update->integ_key_len; + } + + return 0; +} + +static void +ipsec_rand_seed(void) +{ + struct { + time_t time; + pid_t pid; + void * p; + } seed_data; + + seed_data.time = time(NULL); + seed_data.pid = getpid(); + seed_data.p = (void *)&seed_data; + + RAND_seed((const void *)&seed_data, sizeof(seed_data)); +} + +static clib_error_t * +ipsec_init (vlib_main_t * vm) +{ + clib_error_t * error; + ipsec_main_t * im = &ipsec_main; + vlib_node_t * node; + + ipsec_rand_seed(); + + memset (im, 0, sizeof (im[0])); + + im->vnet_main = vnet_get_main(); + im->vlib_main = vm; + + im->spd_index_by_spd_id = hash_create (0, sizeof (uword)); + im->sa_index_by_sa_id = hash_create (0, sizeof (uword)); + im->spd_index_by_sw_if_index = hash_create (0, sizeof (uword)); + + node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); + ASSERT(node); + im->error_drop_node_index = node->index; + + node = vlib_get_node_by_name (vm, (u8 *) "esp-encrypt"); + ASSERT(node); + im->esp_encrypt_node_index = node->index; + + node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup"); + ASSERT(node); + im->ip4_lookup_node_index = node->index; + + + if ((error = vlib_call_init_function (vm, ipsec_cli_init))) + return error; + + if ((error = vlib_call_init_function (vm, ipsec_tunnel_if_init))) + return error; + + esp_init(); + + if ((error = ikev2_init (vm))) + return error; + + return 0; +} + +VLIB_INIT_FUNCTION (ipsec_init); |