library.c

   1 /*
   2  * OpenConnect (SSL + DTLS) VPN client
   3  *
   4  * Copyright © 2008-2011 Intel Corporation.
   5  *
   6  * Authors: David Woodhouse <dwmw2@infradead.org>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * version 2.1, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to:
  19  *
  20  *   Free Software Foundation, Inc.
  21  *   51 Franklin Street, Fifth Floor,
  22  *   Boston, MA 02110-1301 USA
  23  */
  24
  25 #include "openconnect-internal.h"
  26
  27 struct openconnect_info *openconnect_vpninfo_new_with_cbdata (char *useragent,
  28                                                   openconnect_validate_peer_cert_vfn validate_peer_cert,
  29                                                   openconnect_write_new_config_vfn write_new_config,
  30                                                   openconnect_process_auth_form_vfn process_auth_form,
  31                                                   openconnect_progress_vfn progress,
  32                                                   void *privdata)
  33 {
  34         struct openconnect_info *vpninfo = calloc (sizeof(*vpninfo), 1);
  35
  36         vpninfo->mtu = 1406;
  37         vpninfo->ssl_fd = -1;
  38         vpninfo->useragent = openconnect_create_useragent (useragent);
  39         vpninfo->validate_peer_cert = validate_peer_cert;
  40         vpninfo->write_new_config = write_new_config;
  41         vpninfo->process_auth_form = process_auth_form;
  42         vpninfo->progress = progress;
  43         vpninfo->cbdata = privdata?:vpninfo;
  44
  45         return vpninfo;
  46 }
  47
  48 struct openconnect_info *openconnect_vpninfo_new (char *useragent,
  49                                                   openconnect_validate_peer_cert_fn validate_peer_cert,
  50                                                   openconnect_write_new_config_fn write_new_config,
  51                                                   openconnect_process_auth_form_fn process_auth_form,
  52                                                   openconnect_progress_fn progress)
  53 {
  54         return openconnect_vpninfo_new_with_cbdata (useragent,
  55                                                     (void *)validate_peer_cert,
  56                                                     (void *)write_new_config,
  57                                                     (void *)process_auth_form,
  58                                                     (void *)progress, NULL);
  59 }
  60
  61 static void free_optlist (struct vpn_option *opt)
  62 {
  63         struct vpn_option *next;
  64
  65         for (; opt; opt = next) {
  66                 next = opt->next;
  67                 free(opt->option);
  68                 free(opt->value);
  69                 free(opt);
  70         }
  71 }
  72
  73 void openconnect_vpninfo_free (struct openconnect_info *vpninfo)
  74 {
  75         openconnect_reset_ssl(vpninfo);
  76         free_optlist(vpninfo->cookies);
  77         free_optlist(vpninfo->cstp_options);
  78         free_optlist(vpninfo->dtls_options);
  79         free(vpninfo->hostname);
  80         free(vpninfo->urlpath);
  81         free(vpninfo->redirect_url);
  82         free(vpninfo->proxy_type);
  83         free(vpninfo->proxy);
  84         free(vpninfo->csd_scriptname);
  85         free(vpninfo->csd_stuburl);
  86         /* These are const in openconnect itself, but for consistency of
  87            the library API we do take ownership of the strings we're given,
  88            and thus we have to free them too. */
  89         free((void *)vpninfo->cafile);
  90         if (vpninfo->cert != vpninfo->sslkey)
  91                 free((void *)vpninfo->sslkey);
  92         free((void *)vpninfo->cert);
  93         /* No need to free deflate streams; they weren't initialised */
  94         free(vpninfo);
  95 }
  96
  97 char *openconnect_get_hostname (struct openconnect_info *vpninfo)
  98 {
  99         return vpninfo->hostname;
 100 }
 101
 102 void openconnect_set_hostname (struct openconnect_info *vpninfo, char *hostname)
 103 {
 104         vpninfo->hostname = hostname;
 105 }
 106
 107 char *openconnect_get_urlpath (struct openconnect_info *vpninfo)
 108 {
 109         return vpninfo->urlpath;
 110 }
 111
 112 void openconnect_set_urlpath (struct openconnect_info *vpninfo, char *urlpath)
 113 {
 114         vpninfo->urlpath = urlpath;
 115 }
 116
 117 void openconnect_set_xmlsha1 (struct openconnect_info *vpninfo, char *xmlsha1, int size)
 118 {
 119         if (size != sizeof (vpninfo->xmlsha1))
 120                 return;
 121
 122         memcpy (&vpninfo->xmlsha1, xmlsha1, size);
 123 }
 124
 125 void openconnect_set_cafile (struct openconnect_info *vpninfo, char *cafile)
 126 {
 127         vpninfo->cafile = cafile;
 128 }
 129
 130 void openconnect_setup_csd (struct openconnect_info *vpninfo, uid_t uid, int silent, char *wrapper)
 131 {
 132         vpninfo->uid_csd = uid;
 133         vpninfo->uid_csd_given = silent?2:1;
 134         vpninfo->csd_wrapper = wrapper;
 135 }
 136
 137 void openconnect_set_client_cert (struct openconnect_info *vpninfo, char *cert, char *sslkey)
 138 {
 139         vpninfo->cert = cert;
 140         if (sslkey)
 141                 vpninfo->sslkey = sslkey;
 142         else
 143                 vpninfo->sslkey = cert;
 144 }
 145
 146 struct x509_st *openconnect_get_peer_cert (struct openconnect_info *vpninfo)
 147 {
 148         return SSL_get_peer_certificate(vpninfo->https_ssl);
 149 }
 150
 151 int openconnect_get_port (struct openconnect_info *vpninfo)
 152 {
 153         return vpninfo->port;
 154 }
 155
 156 char *openconnect_get_cookie (struct openconnect_info *vpninfo)
 157 {
 158         return vpninfo->cookie;
 159 }
 160
 161 void openconnect_clear_cookie (struct openconnect_info *vpninfo)
 162 {
 163         if (vpninfo->cookie)
 164                 memset(vpninfo->cookie, 0, strlen(vpninfo->cookie));
 165 }
 166
 167 void openconnect_reset_ssl (struct openconnect_info *vpninfo)
 168 {
 169         if (vpninfo->https_ssl) {
 170                 openconnect_close_https(vpninfo);
 171         }
 172         if (vpninfo->peer_addr) {
 173                 free(vpninfo->peer_addr);
 174                 vpninfo->peer_addr = NULL;
 175         }
 176         if (vpninfo->https_ctx) {
 177                 SSL_CTX_free(vpninfo->https_ctx);
 178                 vpninfo->https_ctx = NULL;
 179         }
 180 }
 181
 182 int openconnect_parse_url (struct openconnect_info *vpninfo, char *url)
 183 {
 184         if (vpninfo->peer_addr) {
 185                 free(vpninfo->peer_addr);
 186                 vpninfo->peer_addr = NULL;
 187         }
 188
 189         return internal_parse_url (url, NULL, &vpninfo->hostname,
 190                                    &vpninfo->port, &vpninfo->urlpath, 443);
 191 }
 192
 193 const char *openconnect_get_version (void)
 194 {
 195         return openconnect_version;
 196 }