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library.c
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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2013 John Morrissey <[email protected]>
*
* Authors: David Woodhouse <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
#include <config.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#ifdef HAVE_LIBSTOKEN
#include <stoken.h>
#endif
#include <libxml/tree.h>
#include <zlib.h>
#include "openconnect-internal.h"
#if defined(OPENCONNECT_GNUTLS)
#include "gnutls.h"
#endif
#if defined(OPENCONNECT_OPENSSL)
#include <openssl/bio.h>
#endif
struct openconnect_info *openconnect_vpninfo_new(const char *useragent,
openconnect_validate_peer_cert_vfn validate_peer_cert,
openconnect_write_new_config_vfn write_new_config,
openconnect_process_auth_form_vfn process_auth_form,
openconnect_progress_vfn progress,
void *privdata)
{
struct openconnect_info *vpninfo = calloc(sizeof(*vpninfo), 1);
#ifdef HAVE_ICONV
char *charset = nl_langinfo(CODESET);
#endif
if (!vpninfo)
return NULL;
#ifdef HAVE_ICONV
if (charset && strcmp(charset, "UTF-8")) {
vpninfo->ic_utf8_to_legacy = iconv_open(charset, "UTF-8");
vpninfo->ic_legacy_to_utf8 = iconv_open("UTF-8", charset);
} else {
vpninfo->ic_utf8_to_legacy = (iconv_t)-1;
vpninfo->ic_legacy_to_utf8 = (iconv_t)-1;
}
#endif
#ifndef _WIN32
vpninfo->tun_fd = -1;
#endif
init_pkt_queue(&vpninfo->incoming_queue);
init_pkt_queue(&vpninfo->outgoing_queue);
init_pkt_queue(&vpninfo->tcp_control_queue);
vpninfo->dtls_tos_current = 0;
vpninfo->dtls_pass_tos = 0;
vpninfo->ssl_fd = vpninfo->dtls_fd = -1;
vpninfo->cmd_fd = vpninfo->cmd_fd_write = -1;
vpninfo->tncc_fd = -1;
vpninfo->cert_expire_warning = 60 * 86400;
vpninfo->req_compr = COMPR_STATELESS;
vpninfo->max_qlen = 10;
vpninfo->localname = strdup("localhost");
vpninfo->port = 443;
vpninfo->useragent = openconnect_create_useragent(useragent);
vpninfo->validate_peer_cert = validate_peer_cert;
vpninfo->write_new_config = write_new_config;
vpninfo->process_auth_form = process_auth_form;
vpninfo->progress = progress;
vpninfo->cbdata = privdata ? : vpninfo;
vpninfo->xmlpost = 1;
vpninfo->verbose = PRG_TRACE;
vpninfo->try_http_auth = 1;
vpninfo->proxy_auth[AUTH_TYPE_BASIC].state = AUTH_DEFAULT_DISABLED;
vpninfo->http_auth[AUTH_TYPE_BASIC].state = AUTH_DEFAULT_DISABLED;
openconnect_set_reported_os(vpninfo, NULL);
if (!vpninfo->localname || !vpninfo->useragent)
goto err;
#ifdef ENABLE_NLS
bindtextdomain("openconnect", LOCALEDIR);
#endif
openconnect_set_protocol(vpninfo, "anyconnect");
return vpninfo;
err:
free(vpninfo->localname);
free(vpninfo->useragent);
free(vpninfo);
return NULL;
}
static const struct vpn_proto openconnect_protos[] = {
{
.name = "anyconnect",
.pretty_name = N_("Cisco AnyConnect or openconnect"),
.description = N_("Compatible with Cisco AnyConnect SSL VPN, as well as ocserv"),
.proto = PROTO_ANYCONNECT,
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = cstp_bye,
.tcp_connect = cstp_connect,
.tcp_mainloop = cstp_mainloop,
.add_http_headers = cstp_common_headers,
.obtain_cookie = cstp_obtain_cookie,
.secure_cookie = "webvpn",
.udp_protocol = "DTLS",
#ifdef HAVE_DTLS
.udp_setup = dtls_setup,
.udp_mainloop = dtls_mainloop,
.udp_close = dtls_close,
.udp_shutdown = dtls_shutdown,
#endif
}, {
.name = "nc",
.pretty_name = N_("Juniper Network Connect"),
.description = N_("Compatible with Juniper Network Connect"),
.proto = PROTO_NC,
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_PERIODIC_TROJAN,
.vpn_close_session = oncp_bye,
.tcp_connect = oncp_connect,
.tcp_mainloop = oncp_mainloop,
.add_http_headers = oncp_common_headers,
.obtain_cookie = oncp_obtain_cookie,
.secure_cookie = "DSID",
.udp_protocol = "ESP",
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = oncp_esp_close,
.udp_shutdown = esp_shutdown,
.udp_send_probes = oncp_esp_send_probes,
.udp_catch_probe = oncp_esp_catch_probe,
#endif
}, {
.name = "gp",
.pretty_name = N_("Palo Alto Networks GlobalProtect"),
.description = N_("Compatible with Palo Alto Networks (PAN) GlobalProtect SSL VPN"),
.proto = PROTO_GPST,
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN | OC_PROTO_PERIODIC_TROJAN,
.vpn_close_session = gpst_bye,
.tcp_connect = gpst_setup,
.tcp_mainloop = gpst_mainloop,
.add_http_headers = gpst_common_headers,
.obtain_cookie = gpst_obtain_cookie,
.udp_protocol = "ESP",
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close,
.udp_shutdown = esp_shutdown,
.udp_send_probes = gpst_esp_send_probes,
.udp_catch_probe = gpst_esp_catch_probe,
#endif
}, {
.name = "pulse",
.pretty_name = N_("Pulse Connect Secure"),
.description = N_("Compatible with Pulse Connect Secure SSL VPN"),
.proto = PROTO_PULSE,
.flags = OC_PROTO_PROXY | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = pulse_bye,
.tcp_connect = pulse_connect,
.tcp_mainloop = pulse_mainloop,
.add_http_headers = http_common_headers,
.obtain_cookie = pulse_obtain_cookie,
.udp_protocol = "ESP",
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close,
.udp_shutdown = esp_shutdown,
.udp_send_probes = oncp_esp_send_probes,
.udp_catch_probe = oncp_esp_catch_probe,
#endif
}, {
.name = "f5",
.pretty_name = N_("F5 BIG-IP SSL VPN"),
.description = N_("Compatible with F5 BIG-IP SSL VPN"),
.proto = PROTO_F5,
.flags = OC_PROTO_PROXY | OC_PROTO_AUTH_CERT,
.vpn_close_session = f5_bye,
.tcp_connect = f5_connect,
.tcp_mainloop = ppp_tcp_mainloop,
.add_http_headers = http_common_headers,
.obtain_cookie = f5_obtain_cookie,
.secure_cookie = "MRHSession",
.udp_protocol = "DTLS",
#ifdef HAVE_DTLS
.udp_setup = dtls_setup,
.udp_mainloop = ppp_udp_mainloop,
.udp_close = dtls_close,
.udp_shutdown = dtls_shutdown,
.udp_catch_probe = f5_dtls_catch_probe,
#endif
}, {
.name = "fortinet",
.pretty_name = N_("Fortinet SSL VPN"),
.description = N_("Compatible with FortiGate SSL VPN"),
.proto = PROTO_FORTINET,
.flags = OC_PROTO_PROXY | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = fortinet_bye,
.tcp_connect = fortinet_connect,
.tcp_mainloop = ppp_tcp_mainloop,
.add_http_headers = fortinet_common_headers,
.obtain_cookie = fortinet_obtain_cookie,
.secure_cookie = "SVPNCOOKIE",
.udp_protocol = "DTLS",
#ifdef HAVE_DTLS
.udp_setup = dtls_setup,
.udp_mainloop = ppp_udp_mainloop,
.udp_close = dtls_close,
.udp_shutdown = dtls_shutdown,
.udp_catch_probe = fortinet_dtls_catch_svrhello,
#endif
}, {
.name = "nullppp",
.pretty_name = N_("PPP over TLS"),
.description = N_("Unauthenticated RFC1661/RFC1662 PPP over TLS, for testing"),
.proto = PROTO_NULLPPP,
.flags = OC_PROTO_PROXY | OC_PROTO_HIDDEN,
.tcp_connect = nullppp_connect,
.tcp_mainloop = nullppp_mainloop,
.add_http_headers = http_common_headers,
.obtain_cookie = nullppp_obtain_cookie,
}, {
.name = "array",
.pretty_name = N_("Array SSL VPN"),
.description = N_("Compatible with Array Networks SSL VPN"),
.proto = PROTO_ARRAY,
.flags = OC_PROTO_PROXY,
.vpn_close_session = array_bye,
.tcp_connect = array_connect,
.tcp_mainloop = array_mainloop,
.add_http_headers = http_common_headers,
.obtain_cookie = array_obtain_cookie,
.udp_protocol = "DTLS",
#ifdef HAVE_DTLS
.udp_setup = dtls_setup,
.udp_mainloop = array_dtls_mainloop,
.udp_close = dtls_close,
.udp_shutdown = dtls_shutdown,
#endif
},
};
#define NR_PROTOS (sizeof(openconnect_protos)/sizeof(*openconnect_protos))
int openconnect_get_supported_protocols(struct oc_vpn_proto **protos)
{
struct oc_vpn_proto *pr;
int i, j;
/* The original version of this function included an all-zero
* sentinel value at the end of the array, so we must continue
* to do so for ABI compatibility even though it's
* functionally redundant as a marker of the array's length,
* along with the explicit length in the return value.
*/
*protos = pr = calloc(NR_PROTOS + 1, sizeof(*pr));
if (!pr)
return -ENOMEM;
for (i = j = 0; i < NR_PROTOS; i++) {
if (!(openconnect_protos[i].flags & OC_PROTO_HIDDEN)) {
pr[j].name = openconnect_protos[i].name;
pr[j].pretty_name = _(openconnect_protos[i].pretty_name);
pr[j].description = _(openconnect_protos[i].description);
pr[j].flags = openconnect_protos[i].flags;
j++;
}
}
return j;
}
void openconnect_free_supported_protocols(struct oc_vpn_proto *protos)
{
free((void *)protos);
}
const char *openconnect_get_protocol(struct openconnect_info *vpninfo)
{
return vpninfo->proto->name;
}
int openconnect_set_protocol(struct openconnect_info *vpninfo, const char *protocol)
{
const struct vpn_proto *p;
int i;
for (i = 0; i < NR_PROTOS; i++) {
p = &openconnect_protos[i];
if (strcasecmp(p->name, protocol))
continue;
vpninfo->proto = p;
if (!p->udp_setup)
vpninfo->dtls_state = DTLS_DISABLED;
return 0;
}
vpn_progress(vpninfo, PRG_ERR,
_("Unknown VPN protocol '%s'\n"), protocol);
return -EINVAL;
}
void openconnect_set_pass_tos(struct openconnect_info *vpninfo, int enable)
{
vpninfo->dtls_pass_tos = enable;
}
void openconnect_set_loglevel(struct openconnect_info *vpninfo, int level)
{
vpninfo->verbose = level;
}
int openconnect_setup_dtls(struct openconnect_info *vpninfo,
int attempt_period)
{
vpninfo->dtls_attempt_period = attempt_period;
if (vpninfo->proto->udp_setup)
return vpninfo->proto->udp_setup(vpninfo);
vpn_progress(vpninfo, PRG_ERR,
_("Built against SSL library with no Cisco DTLS support\n"));
return -EINVAL;
}
int openconnect_obtain_cookie(struct openconnect_info *vpninfo)
{
#ifdef HAVE_LIBSTOKEN
int ret;
if (vpninfo->token_mode == OC_TOKEN_MODE_STOKEN) {
ret = prepare_stoken(vpninfo);
if (ret)
return ret;
}
#endif
return vpninfo->proto->obtain_cookie(vpninfo);
}
int openconnect_make_cstp_connection(struct openconnect_info *vpninfo)
{
int result = vpninfo->proto->tcp_connect(vpninfo);
/* ssl_times.last_tx should be set to show that a connection has been setup */
if (result == 0 && vpninfo->ssl_times.last_tx == 0)
vpninfo->ssl_times.last_tx = time(NULL);
return result;
}
int openconnect_set_reported_os(struct openconnect_info *vpninfo,
const char *os)
{
if (!os) {
#if defined(__APPLE__)
os = "mac-intel";
#elif defined(__ANDROID__)
os = "android";
#else
os = sizeof(long) > 4 ? "linux-64" : "linux";
#endif
}
STRDUP(vpninfo->platname, os);
return 0;
}
int openconnect_set_mobile_info(struct openconnect_info *vpninfo,
const char *mobile_platform_version,
const char *mobile_device_type,
const char *mobile_device_uniqueid)
{
STRDUP(vpninfo->mobile_platform_version, mobile_platform_version);
STRDUP(vpninfo->mobile_device_type, mobile_device_type);
STRDUP(vpninfo->mobile_device_uniqueid, mobile_device_uniqueid);
return 0;
}
int openconnect_set_version_string(struct openconnect_info *vpninfo,
const char *version_string)
{
STRDUP(vpninfo->version_string, version_string);
return 0;
}
const char *add_option_dup(struct oc_vpn_option **list,
const char *opt,
const char *val, int val_len)
{
const char *ret;
char *new_val;
if (val_len >= 0)
new_val = strndup(val, val_len);
else
new_val = strdup(val);
ret = add_option_steal(list, opt, &new_val);
free(new_val);
return ret;
}
const char *add_option_steal(struct oc_vpn_option **list,
const char *opt, char **val)
{
struct oc_vpn_option *new = malloc(sizeof(*new));
if (!new)
return NULL;
new->option = strdup(opt);
if (!new->option) {
free(new);
return NULL;
}
new->value = *val;
*val = NULL;
new->next = *list;
*list = new;
return new->value;
}
const char *add_option_ipaddr(struct oc_vpn_option **list,
const char *opt, int af, void *addr)
{
char buf[40];
if (!inet_ntop(af, addr, buf, sizeof(buf)))
return NULL;
return add_option_dup(list, opt, buf, -1);
}
void free_optlist(struct oc_vpn_option *opt)
{
struct oc_vpn_option *next;
for (; opt; opt = next) {
next = opt->next;
free(opt->option);
free(opt->value);
free(opt);
}
}
int install_vpn_opts(struct openconnect_info *vpninfo, struct oc_vpn_option *opt,
struct oc_ip_info *ip_info)
{
/* F5 doesn't get its IP address until it actually establishes the
* PPP connection. */
if (vpninfo->proto->proto != PROTO_F5 && !ip_info->addr &&
!ip_info->addr6 && !ip_info->netmask6) {
vpn_progress(vpninfo, PRG_ERR,
_("No IP address received. Aborting\n"));
return -EINVAL;
}
if (vpninfo->ip_info.addr) {
if (!ip_info->addr || strcmp(ip_info->addr, vpninfo->ip_info.addr)) {
vpn_progress(vpninfo, PRG_ERR,
_("Reconnect gave different Legacy IP address (%s != %s)\n"),
ip_info->addr, vpninfo->ip_info.addr);
/* EPERM means that the retry loop will abort and won't keep trying. */
return -EPERM;
}
}
if (vpninfo->ip_info.netmask) {
if (!ip_info->netmask || strcmp(ip_info->netmask, vpninfo->ip_info.netmask)) {
vpn_progress(vpninfo, PRG_ERR,
_("Reconnect gave different Legacy IP netmask (%s != %s)\n"),
ip_info->netmask, vpninfo->ip_info.netmask);
return -EPERM;
}
}
if (vpninfo->ip_info.addr6) {
if (!ip_info->addr6 || strcmp(ip_info->addr6, vpninfo->ip_info.addr6)) {
vpn_progress(vpninfo, PRG_ERR,
_("Reconnect gave different IPv6 address (%s != %s)\n"),
ip_info->addr6, vpninfo->ip_info.addr6);
return -EPERM;
}
}
if (vpninfo->ip_info.netmask6) {
if (!ip_info->netmask6 || strcmp(ip_info->netmask6, vpninfo->ip_info.netmask6)) {
vpn_progress(vpninfo, PRG_ERR,
_("Reconnect gave different IPv6 netmask (%s != %s)\n"),
ip_info->netmask6, vpninfo->ip_info.netmask6);
return -EPERM;
}
}
/* Preserve gateway_addr and MTU if they were set */
ip_info->gateway_addr = vpninfo->ip_info.gateway_addr;
if (!ip_info->mtu)
ip_info->mtu = vpninfo->ip_info.mtu;
if (ip_info->mtu && ip_info->mtu < 1280 &&
(ip_info->addr6 || ip_info->netmask6)) {
vpn_progress(vpninfo, PRG_ERR,
_("IPv6 configuration received but MTU %d is too small.\n"),
ip_info->mtu);
}
/* Free the original options */
free_split_routes(&vpninfo->ip_info);
free_optlist(vpninfo->cstp_options);
/* Install the new options */
vpninfo->cstp_options = opt;
vpninfo->ip_info = *ip_info;
return 0;
}
void openconnect_vpninfo_free(struct openconnect_info *vpninfo)
{
openconnect_close_https(vpninfo, 1);
if (vpninfo->proto->udp_shutdown)
vpninfo->proto->udp_shutdown(vpninfo);
if (vpninfo->tncc_fd != -1)
closesocket(vpninfo->tncc_fd);
if (vpninfo->cmd_fd_write != -1) {
closesocket(vpninfo->cmd_fd);
closesocket(vpninfo->cmd_fd_write);
}
free(vpninfo->ppp);
buf_free(vpninfo->ppp_tls_connect_req);
buf_free(vpninfo->ppp_dtls_connect_req);
#ifdef HAVE_ICONV
if (vpninfo->ic_utf8_to_legacy != (iconv_t)-1)
iconv_close(vpninfo->ic_utf8_to_legacy);
if (vpninfo->ic_legacy_to_utf8 != (iconv_t)-1)
iconv_close(vpninfo->ic_legacy_to_utf8);
#endif
#ifdef _WIN32
if (vpninfo->cmd_event)
CloseHandle(vpninfo->cmd_event);
if (vpninfo->ssl_event)
CloseHandle(vpninfo->ssl_event);
if (vpninfo->dtls_event)
CloseHandle(vpninfo->dtls_event);
free(vpninfo->ifname_w);
#endif
free(vpninfo->peer_addr);
free(vpninfo->ip_info.gateway_addr);
free_optlist(vpninfo->csd_env);
free_optlist(vpninfo->script_env);
free_optlist(vpninfo->cookies);
free_optlist(vpninfo->cstp_options);
free_optlist(vpninfo->dtls_options);
free_split_routes(&vpninfo->ip_info);
free(vpninfo->hostname);
free(vpninfo->unique_hostname);
buf_free(vpninfo->connect_urlbuf);
free(vpninfo->urlpath);
free(vpninfo->redirect_url);
free_pass(&vpninfo->cookie);
free(vpninfo->proxy_type);
free(vpninfo->proxy);
free(vpninfo->proxy_user);
free_pass(&vpninfo->proxy_pass);
free_pass(&vpninfo->certinfo[0].password);
free(vpninfo->vpnc_script);
free(vpninfo->cafile);
free(vpninfo->ifname);
free(vpninfo->dtls_cipher);
free(vpninfo->peer_cert_hash);
free(vpninfo->ciphersuite_config);
#if defined(OPENCONNECT_OPENSSL)
free(vpninfo->cstp_cipher);
#if defined(HAVE_BIO_METH_FREE)
if (vpninfo->ttls_bio_meth)
BIO_meth_free(vpninfo->ttls_bio_meth);
#endif
#ifdef HAVE_DTLS
free(vpninfo->dtls_cipher_desc);
#endif
#elif defined(OPENCONNECT_GNUTLS)
gnutls_free(vpninfo->cstp_cipher);
#ifdef HAVE_DTLS
gnutls_free(vpninfo->dtls_cipher_desc);
#endif
#endif
free(vpninfo->dtls_addr);
if (vpninfo->csd_scriptname) {
unlink(vpninfo->csd_scriptname);
free(vpninfo->csd_scriptname);
}
free(vpninfo->mobile_platform_version);
free(vpninfo->mobile_device_type);
free(vpninfo->mobile_device_uniqueid);
free(vpninfo->csd_token);
free(vpninfo->csd_ticket);
free(vpninfo->csd_stuburl);
free(vpninfo->csd_starturl);
free(vpninfo->csd_waiturl);
free(vpninfo->csd_preurl);
free(vpninfo->platname);
if (vpninfo->opaque_srvdata)
xmlFreeNode(vpninfo->opaque_srvdata);
free(vpninfo->profile_url);
free(vpninfo->profile_sha1);
/* These are const in openconnect itself, but for consistency of
the library API we do take ownership of the strings we're given,
and thus we have to free them too. */
if (vpninfo->certinfo[0].cert != vpninfo->certinfo[0].key)
free((void *)vpninfo->certinfo[0].key);
free((void *)vpninfo->certinfo[0].cert);
if (vpninfo->peer_cert) {
#if defined(OPENCONNECT_OPENSSL)
X509_free(vpninfo->peer_cert);
#elif defined(OPENCONNECT_GNUTLS)
gnutls_x509_crt_deinit(vpninfo->peer_cert);
#endif
vpninfo->peer_cert = NULL;
}
while (vpninfo->pin_cache) {
struct pin_cache *cache = vpninfo->pin_cache;
free(cache->token);
memset(cache->pin, 0x5a, strlen(cache->pin));
free(cache->pin);
vpninfo->pin_cache = cache->next;
free(cache);
}
free(vpninfo->localname);
free(vpninfo->useragent);
free(vpninfo->authgroup);
#ifdef HAVE_LIBSTOKEN
if (vpninfo->stoken_pin)
free_pass(&vpninfo->stoken_pin);
if (vpninfo->stoken_ctx)
stoken_destroy(vpninfo->stoken_ctx);
#endif
if (vpninfo->oath_secret) {
#ifdef HAVE_LIBPSKC
if (vpninfo->pskc)
pskc_done(vpninfo->pskc);
else
#endif /* HAVE_LIBPSKC */
free_pass(&vpninfo->oath_secret);
}
#ifdef HAVE_LIBPCSCLITE
release_pcsc_ctx(vpninfo);
#endif
#ifdef HAVE_LIBP11
if (vpninfo->pkcs11_ctx) {
if (vpninfo->pkcs11_slot_list)
PKCS11_release_all_slots(vpninfo->pkcs11_ctx,
vpninfo->pkcs11_slot_list,
vpninfo->pkcs11_slot_count);
PKCS11_CTX_unload(vpninfo->pkcs11_ctx);
PKCS11_CTX_free(vpninfo->pkcs11_ctx);
}
free(vpninfo->pkcs11_cert_id);
#endif
/* These check strm->state so they are safe to call multiple times */
inflateEnd(&vpninfo->inflate_strm);
deflateEnd(&vpninfo->deflate_strm);
free(vpninfo->deflate_pkt);
free(vpninfo->tun_pkt);
free(vpninfo->dtls_pkt);
free(vpninfo->cstp_pkt);
free(vpninfo->bearer_token);
free(vpninfo);
}
const char *openconnect_get_connect_url(struct openconnect_info *vpninfo)
{
struct oc_text_buf *urlbuf = vpninfo->connect_urlbuf;
if (!urlbuf)
urlbuf = buf_alloc();
buf_append(urlbuf, "https://%s", vpninfo->hostname);
if (vpninfo->port != 443)
buf_append(urlbuf, ":%d", vpninfo->port);
buf_append(urlbuf, "/");
/* Other protocols don't care and just leave noise from the
* authentication process in ->urlpath. Pulse does care, and
* you have to *connect* to a given usergroup at the correct
* path, not just authenticate.
*
* https://gitlab.gnome.org/GNOME/NetworkManager-openconnect/-/issues/53
* https://gitlab.gnome.org/GNOME/NetworkManager-openconnect/-/merge_requests/22
*/
if (vpninfo->proto->proto == PROTO_PULSE)
buf_append(urlbuf, "%s", vpninfo->urlpath);
if (buf_error(urlbuf)) {
buf_free(urlbuf);
vpninfo->connect_urlbuf = NULL;
return NULL;
}
vpninfo->connect_urlbuf = urlbuf;
return urlbuf->data;
}
const char *openconnect_get_hostname(struct openconnect_info *vpninfo)
{
return vpninfo->unique_hostname?:vpninfo->hostname;
}
const char *openconnect_get_dnsname(struct openconnect_info *vpninfo)
{
return vpninfo->hostname;
}
int openconnect_set_hostname(struct openconnect_info *vpninfo,
const char *hostname)
{
UTF8CHECK(hostname);
STRDUP(vpninfo->hostname, hostname);
free(vpninfo->unique_hostname);
vpninfo->unique_hostname = NULL;
free(vpninfo->peer_addr);
vpninfo->peer_addr = NULL;
free(vpninfo->ip_info.gateway_addr);
vpninfo->ip_info.gateway_addr = NULL;
return 0;
}
char *openconnect_get_urlpath(struct openconnect_info *vpninfo)
{
return vpninfo->urlpath;
}
int openconnect_set_urlpath(struct openconnect_info *vpninfo,
const char *urlpath)
{
UTF8CHECK(urlpath);
STRDUP(vpninfo->urlpath, urlpath);
return 0;
}
int openconnect_set_localname(struct openconnect_info *vpninfo,
const char *localname)
{
UTF8CHECK(localname);
STRDUP(vpninfo->localname, localname);
return 0;
}
void openconnect_set_xmlsha1(struct openconnect_info *vpninfo,
const char *xmlsha1, int size)
{
if (size != sizeof(vpninfo->xmlsha1))
return;
memcpy(&vpninfo->xmlsha1, xmlsha1, size);
}
int openconnect_disable_ipv6(struct openconnect_info *vpninfo)
{
/* This prevents disabling IPv6 when the connection is
* currently connected or has been connected previously.
*
* XX: It would be better to allow it when currently
* disconnected, but we currently have no way to indicate
* a state in which IP and routing configuration are
* unconfigured state. (Neither a closed TLS socket
* nor tunnel socket is a reliable indicator.)
*/
if (!vpninfo->disable_ipv6 &&
vpninfo->ssl_times.last_tx != 0)
return -EINVAL;
vpninfo->disable_ipv6 = 1;
return 0;
}
int openconnect_disable_dtls(struct openconnect_info *vpninfo)
{
/* This disables DTLS or ESP. It is prevented when the
* connection is currently connected or has been
* connected previously.
*
* XX: It would be better to allow it when DTLS is not
* in use, but other than DTLS already being disabled,
* we currently do not have a reliable indicator of
* this.
*/
if (vpninfo->dtls_state != DTLS_NOSECRET
|| vpninfo->ssl_times.last_tx != 0)
return -EINVAL;
vpninfo->dtls_state = DTLS_DISABLED;
return 0;
}
int openconnect_set_cafile(struct openconnect_info *vpninfo, const char *cafile)
{
UTF8CHECK(cafile);
STRDUP(vpninfo->cafile, cafile);
return 0;
}
void openconnect_set_system_trust(struct openconnect_info *vpninfo, unsigned val)
{
vpninfo->no_system_trust = !val;
}
const char *openconnect_get_ifname(struct openconnect_info *vpninfo)
{
return vpninfo->ifname;
}
void openconnect_set_reqmtu(struct openconnect_info *vpninfo, int reqmtu)
{
vpninfo->reqmtu = reqmtu;
}
void openconnect_set_dpd(struct openconnect_info *vpninfo, int min_seconds)
{
/* Make sure (ka->dpd / 2), our computed midway point, isn't 0 */
if (!min_seconds || min_seconds >= 2)
vpninfo->dtls_times.dpd = vpninfo->ssl_times.dpd = min_seconds;
else if (min_seconds == 1)
vpninfo->dtls_times.dpd = vpninfo->ssl_times.dpd = 2;
}
void openconnect_set_trojan_interval(struct openconnect_info *vpninfo, int seconds)
{
vpninfo->trojan_interval = seconds;
}
int openconnect_get_idle_timeout(struct openconnect_info *vpninfo)
{
return vpninfo->idle_timeout;
}
time_t openconnect_get_auth_expiration(struct openconnect_info *vpninfo)
{
return vpninfo->auth_expiration;
}
int openconnect_get_ip_info(struct openconnect_info *vpninfo,
const struct oc_ip_info **info,
const struct oc_vpn_option **cstp_options,
const struct oc_vpn_option **dtls_options)
{
if (info)
*info = &vpninfo->ip_info;
if (cstp_options)
*cstp_options = vpninfo->cstp_options;
if (dtls_options)
*dtls_options = vpninfo->dtls_options;
return 0;
}
int openconnect_setup_csd(struct openconnect_info *vpninfo, uid_t uid,
int silent, const char *wrapper)
{
#ifndef _WIN32
vpninfo->uid_csd = uid;
vpninfo->uid_csd_given = silent ? 2 : 1;
#endif
STRDUP(vpninfo->csd_wrapper, wrapper);
return 0;
}
void openconnect_set_xmlpost(struct openconnect_info *vpninfo, int enable)
{
vpninfo->xmlpost = enable;
}
int openconnect_set_client_cert(struct openconnect_info *vpninfo,
const char *cert, const char *sslkey)
{
UTF8CHECK(cert);
UTF8CHECK(sslkey);
/* Avoid freeing it twice if it's the same */
if (vpninfo->certinfo[0].key == vpninfo->certinfo[0].cert)
vpninfo->certinfo[0].key = NULL;
STRDUP(vpninfo->certinfo[0].cert, cert);
if (sslkey) {
STRDUP(vpninfo->certinfo[0].key, sslkey);
} else {
vpninfo->certinfo[0].key = vpninfo->certinfo[0].cert;
}
return 0;
}
int openconnect_get_port(struct openconnect_info *vpninfo)
{
return vpninfo->port;
}
const char *openconnect_get_cookie(struct openconnect_info *vpninfo)
{
return vpninfo->cookie;
}
void openconnect_clear_cookie(struct openconnect_info *vpninfo)
{
if (vpninfo->cookie)
memset(vpninfo->cookie, 0, strlen(vpninfo->cookie));
}
int openconnect_set_cookie(struct openconnect_info *vpninfo,
const char *cookie)
{
UTF8CHECK(cookie);
STRDUP(vpninfo->cookie, cookie);
return 0;
}
void openconnect_reset_ssl(struct openconnect_info *vpninfo)
{
vpninfo->got_cancel_cmd = 0;
openconnect_close_https(vpninfo, 0);
free(vpninfo->peer_addr);
vpninfo->peer_addr = NULL;
vpninfo->dtls_tos_optname = 0;
free(vpninfo->ip_info.gateway_addr);
vpninfo->ip_info.gateway_addr = NULL;
openconnect_clear_cookies(vpninfo);
}
int openconnect_parse_url(struct openconnect_info *vpninfo, const char *url)
{
char *scheme = NULL;
int ret;
UTF8CHECK(url);
openconnect_set_hostname(vpninfo, NULL);
free(vpninfo->urlpath);
vpninfo->urlpath = NULL;
ret = internal_parse_url(url, &scheme, &vpninfo->hostname,
&vpninfo->port, &vpninfo->urlpath, 443);
if (ret) {
vpn_progress(vpninfo, PRG_ERR,
_("Failed to parse server URL '%s'\n"),
url);
return ret;
}
if (scheme && strcmp(scheme, "https")) {
vpn_progress(vpninfo, PRG_ERR,
_("Only https:// permitted for server URL\n"));
ret = -EINVAL;
}
free(scheme);
return ret;
}
void openconnect_set_cert_expiry_warning(struct openconnect_info *vpninfo,
int seconds)
{
vpninfo->cert_expire_warning = seconds;
}
int openconnect_set_key_password(struct openconnect_info *vpninfo, const char *pass)
{
STRDUP(vpninfo->certinfo[0].password, pass);