732 lines
17 KiB
C
732 lines
17 KiB
C
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#include "xauth_request.h"
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#include <daemon.h>
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#include <hydra.h>
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#include <encoding/payloads/cp_payload.h>
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typedef struct private_xauth_request_t private_xauth_request_t;
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enum {
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XAUTH_STATUS_FAIL = 0,
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XAUTH_STATUS_OK = 1,
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};
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/**
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* Private members of a xauth_request_t task.
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*/
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struct private_xauth_request_t {
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/**
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* Public methods and task_t interface.
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*/
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xauth_request_t public;
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/**
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* Assigned IKE_SA.
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*/
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ike_sa_t *ike_sa;
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/**
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* Are we the initiator?
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*/
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bool initiator;
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/**
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* virtual ip
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*/
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host_t *virtual_ip;
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/**
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* list of attributes requested and its handler, entry_t
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*/
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linked_list_t *requested;
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/**
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* The current and next state of the task
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*/
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enum {
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TASK_XAUTH_INIT,
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TASK_XAUTH_PASS_VERIFY,
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TASK_XAUTH_COMPLETE,
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} state, next_state;
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/**
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* The status of the XAuth request
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*/
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status_t status;
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/**
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* The current auth config
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*/
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auth_cfg_t *auth_cfg;
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/**
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* The received XAuth Status
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*/
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u_int16_t xauth_status_data;
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/**
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* The received XAuth user name
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*/
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chunk_t xauth_user_name;
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/**
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* The received XAuth user pass
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*/
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chunk_t xauth_user_pass;
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/**
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* Whether the user name attribute was received
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*/
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bool xauth_user_name_recv;
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/**
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* Whether the user pass attribute was received
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*/
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bool xauth_user_pass_recv;
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/**
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* Whether the XAuth status attribute was received
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*/
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bool xauth_status_recv;
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};
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/**
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* Entry for a requested attribute and the requesting handler
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*/
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typedef struct {
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/** attribute requested */
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configuration_attribute_type_t type;
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/** handler requesting this attribute */
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attribute_handler_t *handler;
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} entry_t;
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/**
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* Get the first authentcation config from peer config
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*/
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static auth_cfg_t *get_auth_cfg(private_xauth_request_t *this, bool local)
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{
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enumerator_t *enumerator;
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auth_cfg_t *cfg = NULL;
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peer_cfg_t *peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
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enumerator = peer_cfg->create_auth_cfg_enumerator(peer_cfg,
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local);
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enumerator->enumerate(enumerator, &cfg);
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enumerator->destroy(enumerator);
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return cfg;
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}
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/**
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* build INTERNAL_IPV4/6_ADDRESS attribute from virtual ip
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*/
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static configuration_attribute_t *build_vip(host_t *vip)
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{
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configuration_attribute_type_t type;
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chunk_t chunk, prefix;
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if (vip->get_family(vip) == AF_INET)
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{
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type = INTERNAL_IP4_ADDRESS;
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if (vip->is_anyaddr(vip))
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{
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chunk = chunk_empty;
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}
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else
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{
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chunk = vip->get_address(vip);
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}
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}
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else
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{
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type = INTERNAL_IP6_ADDRESS;
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if (vip->is_anyaddr(vip))
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{
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chunk = chunk_empty;
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}
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else
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{
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prefix = chunk_alloca(1);
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*prefix.ptr = 64;
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chunk = vip->get_address(vip);
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chunk = chunk_cata("cc", chunk, prefix);
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}
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}
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return configuration_attribute_create_chunk(CONFIGURATION_ATTRIBUTE,
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type, chunk);
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}
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/**
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* Handle a received attribute as initiator
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*/
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static void handle_attribute(private_xauth_request_t *this,
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configuration_attribute_t *ca)
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{
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attribute_handler_t *handler = NULL;
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enumerator_t *enumerator;
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entry_t *entry;
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/* find the handler which requested this attribute */
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enumerator = this->requested->create_enumerator(this->requested);
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while (enumerator->enumerate(enumerator, &entry))
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{
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if (entry->type == ca->get_type(ca))
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{
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handler = entry->handler;
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this->requested->remove_at(this->requested, enumerator);
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free(entry);
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break;
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}
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}
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enumerator->destroy(enumerator);
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/* and pass it to the handle function */
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handler = hydra->attributes->handle(hydra->attributes,
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this->ike_sa->get_other_id(this->ike_sa), handler,
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ca->get_type(ca), ca->get_chunk(ca));
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if (handler)
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{
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this->ike_sa->add_configuration_attribute(this->ike_sa,
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handler, ca->get_type(ca), ca->get_chunk(ca));
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}
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}
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/**
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* process a single configuration attribute
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*/
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static void process_attribute(private_xauth_request_t *this,
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configuration_attribute_t *ca)
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{
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host_t *ip;
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chunk_t addr;
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int family = AF_INET6;
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switch (ca->get_type(ca))
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{
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case XAUTH_USER_NAME:
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this->xauth_user_name = ca->get_chunk(ca);
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this->xauth_user_name_recv = TRUE;
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break;
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case XAUTH_USER_PASSWORD:
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this->xauth_user_pass = ca->get_chunk(ca);
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this->xauth_user_pass_recv = TRUE;
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break;
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case XAUTH_STATUS:
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this->xauth_status_data = ca->get_value(ca);
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this->xauth_status_recv = TRUE;
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break;
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case INTERNAL_IP4_ADDRESS:
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family = AF_INET;
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/* fall */
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case INTERNAL_IP6_ADDRESS:
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{
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addr = ca->get_chunk(ca);
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if (addr.len == 0)
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{
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ip = host_create_any(family);
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}
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else
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{
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/* skip prefix byte in IPv6 payload*/
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if (family == AF_INET6)
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{
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addr.len--;
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}
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ip = host_create_from_chunk(family, addr, 0);
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}
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if (ip)
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{
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DESTROY_IF(this->virtual_ip);
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this->virtual_ip = ip;
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}
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break;
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}
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case INTERNAL_IP4_SERVER:
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case INTERNAL_IP6_SERVER:
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/* assume it's a Windows client if we see proprietary attributes */
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this->ike_sa->enable_extension(this->ike_sa, EXT_MS_WINDOWS);
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/* fall */
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default:
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{
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if (this->initiator)
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{
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handle_attribute(this, ca);
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}
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}
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}
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}
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/**
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* Scan for configuration payloads and attributes
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*/
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static status_t process_payloads(private_xauth_request_t *this, message_t *message)
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{
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enumerator_t *enumerator, *attributes;
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payload_t *payload;
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enumerator = message->create_payload_enumerator(message);
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while (enumerator->enumerate(enumerator, &payload))
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{
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switch(payload->get_type(payload))
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{
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case CONFIGURATION:
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case CONFIGURATION_V1:
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{
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cp_payload_t *cp = (cp_payload_t*)payload;
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configuration_attribute_t *ca;
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switch (cp->get_type(cp))
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{
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case CFG_REQUEST:
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case CFG_REPLY:
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case CFG_SET:
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case CFG_ACK:
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{
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attributes = cp->create_attribute_enumerator(cp);
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while (attributes->enumerate(attributes, &ca))
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{
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DBG2(DBG_IKE, "processing %N attribute",
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configuration_attribute_type_names, ca->get_type(ca));
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process_attribute(this, ca);
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}
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attributes->destroy(attributes);
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break;
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}
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default:
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DBG1(DBG_IKE, "ignoring %N config payload",
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config_type_names, cp->get_type(cp));
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break;
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}
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switch(this->state)
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{
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case TASK_XAUTH_INIT:
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if(((cp->get_type(cp) != CFG_REQUEST) && (cp->get_type(cp) != CFG_REPLY)) ||
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(this->xauth_user_name_recv != TRUE) ||
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(this->xauth_user_pass_recv != TRUE))
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{
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/* Didn't get an XAuth message, assume we're a ConfigMode message, set state appropriately */
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this->state = TASK_XAUTH_COMPLETE;
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this->next_state = TASK_XAUTH_COMPLETE;
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this->status = SUCCESS;
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break;
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}
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this->next_state = TASK_XAUTH_PASS_VERIFY;
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break;
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case TASK_XAUTH_PASS_VERIFY:
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if(((cp->get_type(cp) != CFG_SET) && (cp->get_type(cp) != CFG_ACK)) ||
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(this->xauth_status_recv != TRUE))
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{
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DBG1(DBG_IKE, "Didn't receive XAuth status.");
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return FAILED;
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}
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/* Set the return status for the build call */
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if(cp->get_type(cp) != CFG_ACK)
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{
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this->status = (this->xauth_status_data == XAUTH_STATUS_OK ? SUCCESS : FAILED);
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}
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else
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{
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this->status = SUCCESS;
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}
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this->next_state = TASK_XAUTH_COMPLETE;
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break;
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default:
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this->next_state = TASK_XAUTH_COMPLETE;
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this->status = SUCCESS;
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break;
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}
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}
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default:
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break;
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}
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}
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enumerator->destroy(enumerator);
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return NEED_MORE;
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}
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METHOD(task_t, build_i, status_t,
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private_xauth_request_t *this, message_t *message)
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{
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cp_payload_t *cp = NULL;
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chunk_t chunk = chunk_empty;
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ike_version_t version;
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payload_type_t cp_type;
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payload_type_t ca_type;
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host_t *vip;
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peer_cfg_t *config;
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enumerator_t *enumerator;
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attribute_handler_t *handler;
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configuration_attribute_type_t type;
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chunk_t data;
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version = this->ike_sa->get_version(this->ike_sa);
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if(version == IKEV1)
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{
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if(this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED)
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{
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return NEED_MORE;
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}
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if(!this->auth_cfg)
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{
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this->auth_cfg = get_auth_cfg(this, TRUE);
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}
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switch((uintptr_t)this->auth_cfg->get(this->auth_cfg, AUTH_RULE_AUTH_CLASS))
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{
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case AUTH_CLASS_XAUTH_PSK:
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case AUTH_CLASS_XAUTH_PUBKEY:
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break;
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default:
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/* We aren't XAuth, so do nothing */
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return SUCCESS;
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}
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cp_type = CONFIGURATION_V1;
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ca_type = CONFIGURATION_ATTRIBUTE_V1;
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}
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else /* IKEv2 */
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{
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/* IKEv2 does not support XAuth, skip those states. */
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this->state = TASK_XAUTH_COMPLETE;
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if (message->get_message_id(message) == 1)
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{ /* in first IKE_AUTH only */
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return NEED_MORE;
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}
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cp_type = CONFIGURATION;
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ca_type = CONFIGURATION_ATTRIBUTE;
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}
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switch(this->state)
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{
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case TASK_XAUTH_INIT:
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cp = cp_payload_create_type(cp_type, CFG_REQUEST);
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cp->add_attribute(cp, configuration_attribute_create_chunk(
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ca_type, XAUTH_USER_NAME, chunk));
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cp->add_attribute(cp, configuration_attribute_create_chunk(
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ca_type, XAUTH_USER_PASSWORD, chunk));
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break;
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case TASK_XAUTH_PASS_VERIFY:
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cp = cp_payload_create_type(cp_type, CFG_SET);
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cp->add_attribute(cp, configuration_attribute_create_value(
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XAUTH_STATUS,
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(this->status == FAILED ? XAUTH_STATUS_FAIL : XAUTH_STATUS_OK)));
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break;
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case TASK_XAUTH_COMPLETE:
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/* ConfigMode stuff */
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/* reuse virtual IP if we already have one */
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vip = this->ike_sa->get_virtual_ip(this->ike_sa, TRUE);
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if (!vip)
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{
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config = this->ike_sa->get_peer_cfg(this->ike_sa);
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vip = config->get_virtual_ip(config);
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}
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if (vip)
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{
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cp = cp_payload_create_type(cp_type, CFG_REQUEST);
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cp->add_attribute(cp, build_vip(vip));
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}
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enumerator = hydra->attributes->create_initiator_enumerator(hydra->attributes,
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this->ike_sa->get_other_id(this->ike_sa), vip);
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while (enumerator->enumerate(enumerator, &handler, &type, &data))
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{
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configuration_attribute_t *ca;
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entry_t *entry;
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/* create configuration attribute */
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DBG2(DBG_IKE, "building %N attribute",
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configuration_attribute_type_names, type);
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ca = configuration_attribute_create_chunk(ca_type,
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type, data);
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if (!cp)
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{
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cp = cp_payload_create_type(cp_type, CFG_REQUEST);
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}
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cp->add_attribute(cp, ca);
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/* save handler along with requested type */
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entry = malloc_thing(entry_t);
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entry->type = type;
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entry->handler = handler;
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this->requested->insert_last(this->requested, entry);
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}
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enumerator->destroy(enumerator);
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break;
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default:
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return FAILED;
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}
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/* Add the payloads into the message */
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if(cp)
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{
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message->add_payload(message, (payload_t *)cp);
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}
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return NEED_MORE;
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}
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METHOD(task_t, process_r, status_t,
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private_xauth_request_t *this, message_t *message)
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{
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ike_version_t version;
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payload_type_t cp_type;
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version = this->ike_sa->get_version(this->ike_sa);
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if(version == IKEV1)
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{
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if(this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED)
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{
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return NEED_MORE;
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}
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if(!this->auth_cfg)
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{
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this->auth_cfg = get_auth_cfg(this, TRUE);
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}
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switch((uintptr_t)this->auth_cfg->get(this->auth_cfg, AUTH_RULE_AUTH_CLASS))
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{
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case AUTH_CLASS_XAUTH_PSK:
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case AUTH_CLASS_XAUTH_PUBKEY:
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break;
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default:
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/* We aren't XAuth, so do we should expect ConfigMode stuff */
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return SUCCESS;
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}
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cp_type = CONFIGURATION_V1;
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}
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else /* IKEv2 */
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{
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/* IKEv2 does not support XAuth, skip those states. */
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this->state = TASK_XAUTH_COMPLETE;
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if (message->get_message_id(message) == 1)
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{ /* in first IKE_AUTH only */
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return NEED_MORE;
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}
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cp_type = CONFIGURATION;
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}
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return process_payloads(this, message);
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}
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METHOD(task_t, build_r, status_t,
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private_xauth_request_t *this, message_t *message)
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{
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chunk_t user_name = chunk_from_chars('j', 'o', 's', 't');
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chunk_t user_pass = chunk_from_chars('j', 'o', 's', 't');
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status_t status;
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cp_payload_t *cp = NULL;
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payload_type_t cp_type = CONFIGURATION;
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payload_type_t ca_type = CONFIGURATION_ATTRIBUTE;
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ike_version_t version;
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identification_t *id;
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enumerator_t *enumerator;
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configuration_attribute_type_t type;
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chunk_t value;
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host_t *vip = NULL;
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peer_cfg_t *config;
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if(this->ike_sa->get_state(this->ike_sa) != IKE_ESTABLISHED)
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{
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return NEED_MORE;
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}
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version = this->ike_sa->get_version(this->ike_sa);
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if(version == IKEV1)
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{
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if(!this->auth_cfg)
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{
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this->auth_cfg = get_auth_cfg(this, TRUE);
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}
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switch((uintptr_t)this->auth_cfg->get(this->auth_cfg, AUTH_RULE_AUTH_CLASS))
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{
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case AUTH_CLASS_XAUTH_PSK:
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case AUTH_CLASS_XAUTH_PUBKEY:
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break;
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default:
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this->state = TASK_XAUTH_COMPLETE;
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return SUCCESS;
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}
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cp_type = CONFIGURATION_V1;
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ca_type = CONFIGURATION_ATTRIBUTE_V1;
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}
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switch(this->state)
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{
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case TASK_XAUTH_INIT:
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/* TODO-IKEv1: Fetch the user/pass from an authenticator */
|
|
cp = cp_payload_create_type(cp_type, CFG_REPLY);
|
|
cp->add_attribute(cp, configuration_attribute_create_chunk(
|
|
ca_type, XAUTH_USER_NAME, user_name));
|
|
cp->add_attribute(cp, configuration_attribute_create_chunk(
|
|
ca_type, XAUTH_USER_PASSWORD, user_pass));
|
|
chunk_clear(&user_name);
|
|
chunk_clear(&user_pass);
|
|
|
|
this->state = TASK_XAUTH_PASS_VERIFY;
|
|
status = NEED_MORE;
|
|
break;
|
|
case TASK_XAUTH_PASS_VERIFY:
|
|
cp = cp_payload_create_type(cp_type, CFG_ACK);
|
|
cp->add_attribute(cp, configuration_attribute_create_value(
|
|
XAUTH_STATUS, XAUTH_STATUS_OK));
|
|
status = this->status;
|
|
this->state = TASK_XAUTH_COMPLETE;
|
|
break;
|
|
case TASK_XAUTH_COMPLETE:
|
|
id = this->ike_sa->get_other_eap_id(this->ike_sa);
|
|
|
|
config = this->ike_sa->get_peer_cfg(this->ike_sa);
|
|
if (this->virtual_ip)
|
|
{
|
|
DBG1(DBG_IKE, "peer requested virtual IP %H", this->virtual_ip);
|
|
if (config->get_pool(config))
|
|
{
|
|
vip = hydra->attributes->acquire_address(hydra->attributes,
|
|
config->get_pool(config), id, this->virtual_ip);
|
|
}
|
|
if (vip == NULL)
|
|
{
|
|
DBG1(DBG_IKE, "no virtual IP found, sending %N",
|
|
notify_type_names, INTERNAL_ADDRESS_FAILURE);
|
|
message->add_notify(message, FALSE, INTERNAL_ADDRESS_FAILURE,
|
|
chunk_empty);
|
|
return SUCCESS;
|
|
}
|
|
DBG1(DBG_IKE, "assigning virtual IP %H to peer '%Y'", vip, id);
|
|
this->ike_sa->set_virtual_ip(this->ike_sa, FALSE, vip);
|
|
|
|
cp = cp_payload_create_type(cp_type, CFG_REPLY);
|
|
cp->add_attribute(cp, build_vip(vip));
|
|
}
|
|
|
|
/* query registered providers for additional attributes to include */
|
|
enumerator = hydra->attributes->create_responder_enumerator(
|
|
hydra->attributes, config->get_pool(config), id, vip);
|
|
while (enumerator->enumerate(enumerator, &type, &value))
|
|
{
|
|
if (!cp)
|
|
{
|
|
cp = cp_payload_create_type(cp_type, CFG_REPLY);
|
|
}
|
|
DBG2(DBG_IKE, "building %N attribute",
|
|
configuration_attribute_type_names, type);
|
|
cp->add_attribute(cp,
|
|
configuration_attribute_create_chunk(ca_type,
|
|
type, value));
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
status = SUCCESS;
|
|
break;
|
|
default:
|
|
return FAILED;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
METHOD(task_t, process_i, status_t,
|
|
private_xauth_request_t *this, message_t *message)
|
|
{
|
|
status_t status;
|
|
if (this->ike_sa->get_state(this->ike_sa) == IKE_ESTABLISHED)
|
|
{ /* in last IKE_AUTH exchange */
|
|
|
|
status = process_payloads(this, message);
|
|
this->state = this->next_state;
|
|
|
|
if (this->virtual_ip)
|
|
{
|
|
this->ike_sa->set_virtual_ip(this->ike_sa, TRUE, this->virtual_ip);
|
|
}
|
|
if(this->state == TASK_XAUTH_COMPLETE)
|
|
return this->status;
|
|
return status;
|
|
}
|
|
return NEED_MORE;
|
|
|
|
}
|
|
|
|
METHOD(task_t, get_type, task_type_t,
|
|
private_xauth_request_t *this)
|
|
{
|
|
return TASK_XAUTH_REQUEST;
|
|
}
|
|
|
|
METHOD(task_t, migrate, void,
|
|
private_xauth_request_t *this, ike_sa_t *ike_sa)
|
|
{
|
|
DESTROY_IF(this->virtual_ip);
|
|
|
|
this->ike_sa = ike_sa;
|
|
this->virtual_ip = NULL;
|
|
this->requested->destroy_function(this->requested, free);
|
|
this->requested = linked_list_create();
|
|
}
|
|
|
|
METHOD(task_t, destroy, void,
|
|
private_xauth_request_t *this)
|
|
{
|
|
DESTROY_IF(this->virtual_ip);
|
|
this->requested->destroy_function(this->requested, free);
|
|
free(this);
|
|
}
|
|
|
|
METHOD(task_t, swap_initiator, void,
|
|
private_xauth_request_t *this)
|
|
{
|
|
if(this->initiator)
|
|
{
|
|
this->public.task.build = _build_r;
|
|
this->public.task.process = _process_r;
|
|
this->initiator = FALSE;
|
|
}
|
|
else
|
|
{
|
|
this->public.task.build = _build_i;
|
|
this->public.task.process = _process_i;
|
|
this->initiator = TRUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Described in header.
|
|
*/
|
|
xauth_request_t *xauth_request_create(ike_sa_t *ike_sa, bool initiator)
|
|
{
|
|
private_xauth_request_t *this;
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.task = {
|
|
.get_type = _get_type,
|
|
.migrate = _migrate,
|
|
.destroy = _destroy,
|
|
.swap_initiator = _swap_initiator,
|
|
},
|
|
},
|
|
.initiator = initiator,
|
|
.ike_sa = ike_sa,
|
|
.requested = linked_list_create(),
|
|
.state = TASK_XAUTH_INIT,
|
|
.next_state = TASK_XAUTH_INIT,
|
|
.xauth_status_data = XAUTH_STATUS_FAIL,
|
|
.xauth_user_name = chunk_empty,
|
|
.xauth_user_pass = chunk_empty,
|
|
.xauth_user_name_recv = FALSE,
|
|
.xauth_user_pass_recv = FALSE,
|
|
.xauth_status_recv = FALSE,
|
|
);
|
|
|
|
if (initiator)
|
|
{
|
|
this->public.task.build = _build_i;
|
|
this->public.task.process = _process_i;
|
|
}
|
|
else
|
|
{
|
|
this->public.task.build = _build_r;
|
|
this->public.task.process = _process_r;
|
|
}
|
|
|
|
return &this->public;
|
|
}
|