/*
- * decap.c : IPSec tunnel support
+ * ipsec.c : IPSEC module functions
*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
#include <vnet/udp/udp.h>
#include <vnet/ipsec/ipsec.h>
-#include <vnet/ipsec/ikev2.h>
#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ah.h>
-
ipsec_main_t ipsec_main;
-u32
-ipsec_get_sa_index_by_sa_id (u32 sa_id)
-{
- ipsec_main_t *im = &ipsec_main;
- uword *p = hash_get (im->sa_index_by_sa_id, sa_id);
- if (!p)
- return ~0;
-
- return p[0];
-}
-
-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;
- ip4_ipsec_config_t config;
-
- u32 spd_index;
- 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_feature_enable_disable ("ip4-output", "ipsec4-output-feature",
- sw_if_index, is_add, 0, 0);
- vnet_feature_enable_disable ("ip6-output", "ipsec6-output-feature",
- sw_if_index, is_add, 0, 0);
-
- config.spd_index = spd_index;
-
- /* enable IPsec on RX */
- vnet_feature_enable_disable ("ip4-unicast", "ipsec4-input-feature",
- sw_if_index, is_add, &config, sizeof (config));
- vnet_feature_enable_disable ("ip6-unicast", "ipsec6-input-feature",
- sw_if_index, is_add, &config, sizeof (config));
-
- 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;
- /* *INDENT-OFF* */
- hash_foreach (k, v, im->spd_index_by_sw_if_index, ({
- if (v == spd_index)
- ipsec_set_interface_spd(vm, k, spd_id, 0);
- }));
- /* *INDENT-ON* */
- 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);
- clib_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)
-{
- u32 *id1 = a1;
- u32 *id2 = a2;
- ipsec_spd_t *spd = ipsec_main.spd_to_sort;
- ipsec_policy_t *p1, *p2;
-
- 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);
- clib_memcpy (vp, policy, sizeof (*vp));
- policy_index = vp - spd->policies;
-
- ipsec_main.spd_to_sort = spd;
-
- if (policy->is_outbound)
- {
- if (policy->is_ipv6)
- {
- vec_add1 (spd->ipv6_outbound_policies, policy_index);
- vec_sort_with_function (spd->ipv6_outbound_policies,
- ipsec_spd_entry_sort);
- }
- else
- {
- vec_add1 (spd->ipv4_outbound_policies, policy_index);
- 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);
- 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);
- 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);
- 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);
- vec_sort_with_function
- (spd->ipv4_inbound_policy_discard_and_bypass_indices,
- ipsec_spd_entry_sort);
- }
- }
- }
-
- ipsec_main.spd_to_sort = NULL;
- }
- else
- {
- u32 i, j;
- /* *INDENT-OFF* */
- 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;
- }));
- /* *INDENT-ON* */
- }
-
- return 0;
-}
-
-u8
-ipsec_is_sa_used (u32 sa_index)
-{
- ipsec_main_t *im = &ipsec_main;
- ipsec_spd_t *spd;
- ipsec_policy_t *p;
- ipsec_tunnel_if_t *t;
-
- /* *INDENT-OFF* */
- 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;
- }
- }));
- }));
-
- pool_foreach(t, im->tunnel_interfaces, ({
- if (t->input_sa_index == sa_index)
- return 1;
- if (t->output_sa_index == sa_index)
- return 1;
- }));
- /* *INDENT-ON* */
-
- return 0;
-}
-
-clib_error_t *
-ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa,
- u32 sa_index, int is_add)
-{
- ipsec_ah_backend_t *ab;
- ipsec_esp_backend_t *eb;
- switch (sa->protocol)
- {
- case IPSEC_PROTOCOL_AH:
- ab = pool_elt_at_index (im->ah_backends, im->ah_current_backend);
- if (ab->add_del_sa_sess_cb)
- return ab->add_del_sa_sess_cb (sa_index, is_add);
- break;
- case IPSEC_PROTOCOL_ESP:
- eb = pool_elt_at_index (im->esp_backends, im->esp_current_backend);
- if (eb->add_del_sa_sess_cb)
- return eb->add_del_sa_sess_cb (sa_index, is_add);
- break;
- }
- 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_error_t *err;
-
- 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);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- pool_put (im->sad, sa);
- }
- else /* create new SA */
- {
- pool_get (im->sad, sa);
- clib_memcpy (sa, new_sa, sizeof (*sa));
- sa_index = sa - im->sad;
- hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
- 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;
- clib_error_t *err;
-
- 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)
- {
- clib_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)
- {
- clib_memcpy (sa->integ_key, sa_update->integ_key,
- sa_update->integ_key_len);
- sa->integ_key_len = sa_update->integ_key_len;
- }
-
- if (0 < sa_update->crypto_key_len || 0 < sa_update->integ_key_len)
- {
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- }
-
- return 0;
-}
-
static void
ipsec_rand_seed (void)
{
}
static clib_error_t *
-ipsec_check_support (ipsec_sa_t * sa)
+ipsec_check_ah_support (ipsec_sa_t * sa)
{
- if (sa->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
- return clib_error_return (0, "unsupported aes-gcm-128 crypto-alg");
if (sa->integ_alg == IPSEC_INTEG_ALG_NONE)
return clib_error_return (0, "unsupported none integ-alg");
+ return 0;
+}
+
+static clib_error_t *
+ipsec_check_esp_support (ipsec_sa_t * sa)
+{
+ if (sa->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
+ return clib_error_return (0, "unsupported aes-gcm-128 crypto-alg");
+ if (sa->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_192)
+ return clib_error_return (0, "unsupported aes-gcm-192 crypto-alg");
+ if (sa->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_256)
+ return clib_error_return (0, "unsupported aes-gcm-256 crypto-alg");
return 0;
}
ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa)
{
clib_error_t *error = 0;
- ipsec_ah_backend_t *ah =
- pool_elt_at_index (im->ah_backends, im->ah_current_backend);
- ASSERT (ah->check_support_cb);
- error = ah->check_support_cb (sa);
- if (error)
- return error;
- ipsec_esp_backend_t *esp =
- pool_elt_at_index (im->esp_backends, im->esp_current_backend);
- ASSERT (esp->check_support_cb);
- error = esp->check_support_cb (sa);
+
+ if (PREDICT_FALSE (sa->protocol == IPSEC_PROTOCOL_AH))
+ {
+ ipsec_ah_backend_t *ah =
+ pool_elt_at_index (im->ah_backends, im->ah_current_backend);
+ ASSERT (ah->check_support_cb);
+ error = ah->check_support_cb (sa);
+ }
+ else
+ {
+ ipsec_esp_backend_t *esp =
+ pool_elt_at_index (im->esp_backends, im->esp_current_backend);
+ ASSERT (esp->check_support_cb);
+ error = esp->check_support_cb (sa);
+ }
return error;
}
return b - im->esp_backends;
}
+static walk_rc_t
+ipsec_sa_restack (ipsec_sa_t * sa, void *ctx)
+{
+ ipsec_sa_stack (sa);
+
+ return (WALK_CONTINUE);
+}
+
int
ipsec_select_ah_backend (ipsec_main_t * im, u32 backend_idx)
{
im->ah6_decrypt_node_index = b->ah6_decrypt_node_index;
im->ah6_encrypt_next_index = b->ah6_encrypt_next_index;
im->ah6_decrypt_next_index = b->ah6_decrypt_next_index;
+
+ ipsec_sa_walk (ipsec_sa_restack, NULL);
return 0;
}
im->esp6_decrypt_node_index = b->esp6_decrypt_node_index;
im->esp6_encrypt_next_index = b->esp6_encrypt_next_index;
im->esp6_decrypt_next_index = b->esp6_decrypt_next_index;
+
+ ipsec_sa_walk (ipsec_sa_restack, NULL);
return 0;
}
"ah4-decrypt",
"ah6-encrypt",
"ah6-decrypt",
- ipsec_check_support,
+ ipsec_check_ah_support,
NULL);
im->ah_default_backend = idx;
"esp4-decrypt",
"esp6-encrypt",
"esp6-decrypt",
- ipsec_check_support, NULL);
+ ipsec_check_esp_support, NULL);
im->esp_default_backend = idx;
rv = ipsec_select_esp_backend (im, idx);
ipsec_proto_init ();
- if ((error = ikev2_init (vm)))
- return error;
-
return 0;
}
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