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library.c
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library.c
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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2013 John Morrissey <jwm@horde.net>
*
* Authors: David Woodhouse <dwmw2@infradead.org>
*
* 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
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->oncp_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->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;
}
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"),
.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,
#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 / Pulse Secure SSL VPN"),
.flags = OC_PROTO_PROXY | OC_PROTO_CSD | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP,
.vpn_close_session = oncp_bye,
.tcp_connect = oncp_connect,
.tcp_mainloop = oncp_mainloop,
.add_http_headers = oncp_common_headers,
.obtain_cookie = oncp_obtain_cookie,
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close,
.udp_shutdown = esp_shutdown,
.udp_send_probes = esp_send_probes,
.udp_catch_probe = esp_catch_probe,
#endif
}, {
.name = "gp",
.pretty_name = N_("Palo Alto Networks GlobalProtect"),
.description = N_("Compatible with Palo Alto Networks (PAN) GlobalProtect SSL VPN"),
.override_useragent = "PAN GlobalProtect",
.flags = OC_PROTO_PROXY | OC_PROTO_AUTH_CERT | OC_PROTO_AUTH_OTP | OC_PROTO_AUTH_STOKEN,
.vpn_close_session = gpst_bye,
.tcp_connect = gpst_setup,
.tcp_mainloop = gpst_mainloop,
.add_http_headers = gpst_common_headers,
.obtain_cookie = gpst_obtain_cookie,
#ifdef HAVE_ESP
.udp_setup = esp_setup,
.udp_mainloop = esp_mainloop,
.udp_close = esp_close_secret,
.udp_shutdown = esp_shutdown,
.udp_send_probes = esp_send_probes_gp,
.udp_catch_probe = esp_catch_probe_gp,
#endif
},
{ /* NULL */ }
};
int openconnect_get_supported_protocols(struct oc_vpn_proto **protos)
{
struct oc_vpn_proto *pr;
const struct vpn_proto *p;
*protos = pr = calloc(sizeof(openconnect_protos)/sizeof(*openconnect_protos), sizeof(*pr));
if (!pr)
return -ENOMEM;
for (p = openconnect_protos; p->name; p++, pr++) {
pr->name = p->name;
pr->pretty_name = p->pretty_name;
pr->description = p->description;
pr->flags = p->flags;
}
return (p - openconnect_protos);
}
void openconnect_free_supported_protocols(struct oc_vpn_proto *protos)
{
free((void *)protos);
}
int openconnect_set_protocol(struct openconnect_info *vpninfo, const char *protocol)
{
const struct vpn_proto *p;
for (p = openconnect_protos; p->name; p++) {
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)
{
if (vpninfo->proto->udp_setup)
return vpninfo->proto->udp_setup(vpninfo, attempt_period);
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)
{
return vpninfo->proto->obtain_cookie(vpninfo);
}
int openconnect_make_cstp_connection(struct openconnect_info *vpninfo)
{
return vpninfo->proto->tcp_connect(vpninfo);
}
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
}
if (!strcmp(os, "mac-intel"))
vpninfo->csd_xmltag = "csdMac";
else if (!strcmp(os, "linux") || !strcmp(os, "linux-64"))
vpninfo->csd_xmltag = "csdLinux";
else if (!strcmp(os, "android") || !strcmp(os, "apple-ios")) {
vpninfo->csd_xmltag = "csdLinux";
vpninfo->csd_nostub = 1;
} else if (!strcmp(os, "win"))
vpninfo->csd_xmltag = "csd";
else
return -EINVAL;
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;
}
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);
}
}
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);
}
#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);
#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);
free(vpninfo->hostname);
free(vpninfo->unique_hostname);
free(vpninfo->urlpath);
free(vpninfo->redirect_url);
free(vpninfo->cookie);
free(vpninfo->proxy_type);
free(vpninfo->proxy);
free(vpninfo->proxy_user);
free(vpninfo->proxy_pass);
free(vpninfo->vpnc_script);
free(vpninfo->cafile);
free(vpninfo->ifname);
free(vpninfo->dtls_cipher);
#ifdef OPENCONNECT_GNUTLS
gnutls_free(vpninfo->cstp_cipher); /* In OpenSSL this is const */
#ifdef HAVE_DTLS
gnutls_free(vpninfo->gnutls_dtls_cipher);
#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->cert != vpninfo->sslkey)
free((void *)vpninfo->sslkey);
free((void *)vpninfo->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(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(vpninfo->oath_secret);
}
#ifdef HAVE_LIBPCSCLITE
if (vpninfo->token_mode == OC_TOKEN_MODE_YUBIOATH) {
SCardDisconnect(vpninfo->pcsc_card, SCARD_LEAVE_CARD);
SCardReleaseContext(vpninfo->pcsc_ctx);
}
memset(vpninfo->yubikey_pwhash, 0, sizeof(vpninfo->yubikey_pwhash));
free(vpninfo->yubikey_objname);
#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);
}
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);
}
void openconnect_disable_ipv6(struct openconnect_info *vpninfo)
{
vpninfo->disable_ipv6 = 1;
}
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;
}
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->sslkey == vpninfo->cert)
vpninfo->sslkey = NULL;
STRDUP(vpninfo->cert, cert);
if (sslkey) {
STRDUP(vpninfo->sslkey, sslkey);
} else {
vpninfo->sslkey = vpninfo->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));
}
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;
}
void openconnect_set_pfs(struct openconnect_info *vpninfo, unsigned val)
{
vpninfo->pfs = val;
}
void openconnect_set_cancel_fd(struct openconnect_info *vpninfo, int fd)
{
vpninfo->cmd_fd = fd;
}
#ifdef _WIN32
# define CMD_PIPE_ERR INVALID_SOCKET
#else
# define CMD_PIPE_ERR -EIO
#endif
OPENCONNECT_CMD_SOCKET openconnect_setup_cmd_pipe(struct openconnect_info *vpninfo)
{
OPENCONNECT_CMD_SOCKET pipefd[2];
#ifdef _WIN32
if (dumb_socketpair(pipefd, 0))
return CMD_PIPE_ERR;
#else
if (pipe(pipefd) < 0)
return CMD_PIPE_ERR;
#endif
if (set_sock_nonblock(pipefd[0]) || set_sock_nonblock(pipefd[1])) {
closesocket(pipefd[0]);
closesocket(pipefd[1]);
return CMD_PIPE_ERR;
}
vpninfo->cmd_fd = pipefd[0];
vpninfo->cmd_fd_write = pipefd[1];
return vpninfo->cmd_fd_write;
}
const char *openconnect_get_version(void)
{
return openconnect_version_str;
}
int openconnect_has_pkcs11_support(void)
{
#if defined(OPENCONNECT_GNUTLS) && defined(HAVE_P11KIT)
return 1;
#elif defined(OPENCONNECT_OPENSSL) && defined(HAVE_LIBP11)
return 1;
#else
return 0;
#endif
}
#if defined(OPENCONNECT_OPENSSL) && defined(HAVE_ENGINE)
#include <openssl/engine.h>
#endif
int openconnect_has_tss_blob_support(void)
{
#if defined(OPENCONNECT_OPENSSL) && defined(HAVE_ENGINE)
ENGINE *e;
ENGINE_load_builtin_engines();
e = ENGINE_by_id("tpm");
if (e) {
ENGINE_free(e);
return 1;
}
#elif defined(OPENCONNECT_GNUTLS) && defined(HAVE_TROUSERS)
return 1;
#endif
return 0;
}
int openconnect_has_stoken_support(void)
{
#ifdef HAVE_LIBSTOKEN
return 1;
#else
return 0;
#endif
}
int openconnect_has_oath_support(void)
{
return 2;
}
int openconnect_has_yubioath_support(void)
{
#ifdef HAVE_LIBPCSCLITE
return 1;
#else
return 0;
#endif
}
int openconnect_has_system_key_support(void)
{
#ifdef HAVE_GNUTLS_SYSTEM_KEYS
return 1;
#else
return 0;
#endif
}
int openconnect_set_token_callbacks(struct openconnect_info *vpninfo,
void *tokdata,
openconnect_lock_token_vfn lock,
openconnect_unlock_token_vfn unlock)
{
vpninfo->lock_token = lock;
vpninfo->unlock_token = unlock;
vpninfo->tok_cbdata = tokdata;
return 0;
}
/*
* Enable software token generation.
*
* If token_mode is OC_TOKEN_MODE_STOKEN and token_str is NULL,
* read the token data from ~/.stokenrc.
*
* Return value:
* = -EILSEQ, if token_str is not valid UTF-8
* = -EOPNOTSUPP, if the underlying library (libstoken, liboath) is not
* available or an invalid token_mode was provided
* = -EINVAL, if the token string is invalid (token_str was provided)
* = -ENOENT, if token_mode is OC_TOKEN_MODE_STOKEN and ~/.stokenrc is
* missing (token_str was NULL)
* = -EIO, for other failures in the underlying library (libstoken, liboath)
* = 0, on success
*/
int openconnect_set_token_mode(struct openconnect_info *vpninfo,
oc_token_mode_t token_mode,
const char *token_str)
{
vpninfo->token_mode = OC_TOKEN_MODE_NONE;
UTF8CHECK(token_str);
switch (token_mode) {
case OC_TOKEN_MODE_NONE:
return 0;
#ifdef HAVE_LIBSTOKEN
case OC_TOKEN_MODE_STOKEN:
return set_libstoken_mode(vpninfo, token_str);
#endif
case OC_TOKEN_MODE_TOTP:
return set_totp_mode(vpninfo, token_str);
case OC_TOKEN_MODE_HOTP:
return set_hotp_mode(vpninfo, token_str);
#ifdef HAVE_LIBPCSCLITE
case OC_TOKEN_MODE_YUBIOATH:
return set_yubikey_mode(vpninfo, token_str);
#endif
default:
return -EOPNOTSUPP;
}
}
/*
* Enable libstoken token generation if use_stoken == 1.
*
* If token_str is not NULL, try to parse the string. Otherwise, try to read
* the token data from ~/.stokenrc
*
* DEPRECATED: use openconnect_set_stoken_mode() instead.
*
* Return value:
* = -EILSEQ, if token_str is not valid UTF-8
* = -EOPNOTSUPP, if libstoken is not available
* = -EINVAL, if the token string is invalid (token_str was provided)
* = -ENOENT, if ~/.stokenrc is missing (token_str was NULL)
* = -EIO, for other libstoken failures
* = 0, on success
*/
int openconnect_set_stoken_mode(struct openconnect_info *vpninfo,
int use_stoken, const char *token_str)
{
oc_token_mode_t token_mode = OC_TOKEN_MODE_NONE;
if (use_stoken)
token_mode = OC_TOKEN_MODE_STOKEN;
return openconnect_set_token_mode(vpninfo, token_mode, token_str);
}
void openconnect_set_protect_socket_handler(struct openconnect_info *vpninfo,
openconnect_protect_socket_vfn protect_socket)
{
vpninfo->protect_socket = protect_socket;
}
void openconnect_override_getaddrinfo(struct openconnect_info *vpninfo, openconnect_getaddrinfo_vfn gai_fn)
{
vpninfo->getaddrinfo_override = gai_fn;
}
void openconnect_set_setup_tun_handler(struct openconnect_info *vpninfo,
openconnect_setup_tun_vfn setup_tun)
{
vpninfo->setup_tun = setup_tun;
}
void openconnect_set_reconnected_handler(struct openconnect_info *vpninfo,
openconnect_reconnected_vfn reconnected)
{
vpninfo->reconnected = reconnected;
}
void openconnect_set_stats_handler(struct openconnect_info *vpninfo,
openconnect_stats_vfn stats_handler)
{
vpninfo->stats_handler = stats_handler;
}
/* Set up a traditional OS-based tunnel device, optionally specified in 'ifname'. */
int openconnect_setup_tun_device(struct openconnect_info *vpninfo,
const char *vpnc_script, const char *ifname)
{
intptr_t tun_fd;
char *legacy_ifname;
UTF8CHECK(vpnc_script);
UTF8CHECK(ifname);
STRDUP(vpninfo->vpnc_script, vpnc_script);
STRDUP(vpninfo->ifname, ifname);
prepare_script_env(vpninfo);
script_config_tun(vpninfo, "pre-init");
tun_fd = os_setup_tun(vpninfo);
if (tun_fd < 0)
return tun_fd;
#ifdef _WIN32
if (vpninfo->tun_idx != -1)
script_setenv_int(vpninfo, "TUNIDX", vpninfo->tun_idx);
#endif
legacy_ifname = openconnect_utf8_to_legacy(vpninfo, vpninfo->ifname);
script_setenv(vpninfo, "TUNDEV", legacy_ifname, 0);
if (legacy_ifname != vpninfo->ifname)
free(legacy_ifname);
script_config_tun(vpninfo, "connect");
return openconnect_setup_tun_fd(vpninfo, tun_fd);
}
static const char *compr_name_map[] = {
[COMPR_DEFLATE] = "Deflate",
[COMPR_LZS] = "LZS",
[COMPR_LZ4] = "LZ4"
};
const char *openconnect_get_cstp_compression(struct openconnect_info * vpninfo)
{
if (vpninfo->cstp_compr <= 0 || vpninfo->cstp_compr > COMPR_MAX)
return NULL;
return compr_name_map[vpninfo->cstp_compr];
}
const char *openconnect_get_dtls_compression(struct openconnect_info * vpninfo)
{
if (vpninfo->dtls_compr <= 0 || vpninfo->dtls_compr > COMPR_MAX)
return NULL;
return compr_name_map[vpninfo->dtls_compr];
}
const char *openconnect_get_dtls_cipher(struct openconnect_info *vpninfo)
{
#if defined(OPENCONNECT_GNUTLS)
if (vpninfo->dtls_state != DTLS_CONNECTED) {
gnutls_free(vpninfo->gnutls_dtls_cipher);
vpninfo->gnutls_dtls_cipher = NULL;
return NULL;
}
/* in DTLS rehandshakes don't switch the ciphersuite as only
* one is enabled. */
if (vpninfo->gnutls_dtls_cipher == NULL)
vpninfo->gnutls_dtls_cipher = get_gnutls_cipher(vpninfo->dtls_ssl);
return vpninfo->gnutls_dtls_cipher;
#else
if (vpninfo->dtls_ssl)
return SSL_get_cipher(vpninfo->dtls_ssl);
else
return NULL;
#endif
}
int openconnect_set_csd_environ(struct openconnect_info *vpninfo,
const char *name, const char *value)
{
struct oc_vpn_option *p;
if (!name) {
free_optlist(vpninfo->csd_env);
vpninfo->csd_env = NULL;
return 0;
}
for (p = vpninfo->csd_env; p; p = p->next) {
if (!strcmp(name, p->option)) {
char *valdup = strdup(value);
if (!valdup)
return -ENOMEM;
free(p->value);
p->value = valdup;
return 0;
}
}
p = malloc(sizeof(*p));
if (!p)
return -ENOMEM;
p->option = strdup(name);
if (!p->option) {
free(p);
return -ENOMEM;
}
p->value = strdup(value);
if (!p->value) {
free(p->option);
free(p);
return -ENOMEM;
}
p->next = vpninfo->csd_env;
vpninfo->csd_env = p;
return 0;
}
int openconnect_check_peer_cert_hash(struct openconnect_info *vpninfo,
const char *old_hash)
{
char *fingerprint = NULL;
unsigned min_match_len;
unsigned real_min_match_len = 4;
unsigned old_len, fingerprint_len;
if (strchr(old_hash, ':')) {
if (strncmp(old_hash, "sha1:", 5) == 0) {
fingerprint = openconnect_bin2hex("sha1:", vpninfo->peer_cert_sha1_raw, sizeof(vpninfo->peer_cert_sha1_raw));
min_match_len = real_min_match_len + sizeof("sha1:")-1;
} else if (strncmp(old_hash, "sha256:", 7) == 0) {
fingerprint = openconnect_bin2hex("sha256:", vpninfo->peer_cert_sha256_raw, sizeof(vpninfo->peer_cert_sha256_raw));