src/starter/starterstroke.c

   1 /* Stroke for charon is the counterpart to whack from pluto
   2  * Copyright (C) 2006 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <sys/types.h>
  17 #include <sys/socket.h>
  18 #include <sys/un.h>
  19 #include <stddef.h>
  20 #include <unistd.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26
  27 #include <freeswan.h>
  28
  29 #include <constants.h>
  30 #include <defs.h>
  31 #include <log.h>
  32
  33 #include <stroke_msg.h>
  34
  35 #include "starterstroke.h"
  36 #include "confread.h"
  37 #include "files.h"
  38
  39 #define IPV4_LEN         4
  40 #define IPV6_LEN        16
  41
  42 /**
  43  * Authentication methods, must be the same as in charons authenticator.h
  44  */
  45 enum auth_method_t {
  46         AUTH_PUBKEY =   1,
  47         AUTH_PSK =              2,
  48         AUTH_EAP =              3
  49 };
  50
  51 static char* push_string(stroke_msg_t *msg, char *string)
  52 {
  53         unsigned long string_start = msg->length;
  54
  55         if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
  56         {
  57                 return NULL;
  58         }
  59         else
  60         {
  61                 msg->length += strlen(string) + 1;
  62                 strcpy((char*)msg + string_start, string);
  63                 return (char*)string_start;
  64         }
  65 }
  66
  67 static int send_stroke_msg (stroke_msg_t *msg)
  68 {
  69         struct sockaddr_un ctl_addr;
  70         int byte_count;
  71         char buffer[64];
  72
  73         ctl_addr.sun_family = AF_UNIX;
  74         strcpy(ctl_addr.sun_path, CHARON_CTL_FILE);
  75
  76         /* starter is not called from commandline, and therefore absolutely silent */
  77         msg->output_verbosity = -1;
  78
  79         int sock = socket(AF_UNIX, SOCK_STREAM, 0);
  80
  81         if (sock < 0)
  82         {
  83                 plog("socket() failed: %s", strerror(errno));
  84                 return -1;
  85         }
  86         if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
  87         {
  88                 plog("connect(charon_ctl) failed: %s", strerror(errno));
  89                 close(sock);
  90                 return -1;
  91         }
  92
  93         /* send message */
  94         if (write(sock, msg, msg->length) != msg->length)
  95         {
  96                 plog("write(charon_ctl) failed: %s", strerror(errno));
  97                 close(sock);
  98                 return -1;
  99         }
 100         while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
 101         {
 102                 buffer[byte_count] = '\0';
 103                 plog("%s", buffer);
 104         }
 105         if (byte_count < 0)
 106         {
 107                 plog("read() failed: %s", strerror(errno));
 108         }
 109
 110         close(sock);
 111         return 0;
 112 }
 113
 114 static char* connection_name(starter_conn_t *conn)
 115 {
 116          /* if connection name is '%auto', create a new name like conn_xxxxx */
 117         static char buf[32];
 118
 119         if (streq(conn->name, "%auto"))
 120         {
 121                 sprintf(buf, "conn_%ld", conn->id);
 122                 return buf;
 123         }
 124         return conn->name;
 125 }
 126
 127 static void ip_address2string(ip_address *addr, char *buffer, size_t len)
 128 {
 129         switch (((struct sockaddr*)addr)->sa_family)
 130         {
 131                 case AF_INET6:
 132                 {
 133                         struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addr;
 134                         u_int8_t zeroes[IPV6_LEN];
 135
 136                         memset(zeroes, 0, IPV6_LEN);
 137                         if (memcmp(zeroes, &(sin6->sin6_addr.s6_addr), IPV6_LEN) &&
 138                                 inet_ntop(AF_INET6, &sin6->sin6_addr, buffer, len))
 139                         {
 140                                 return;
 141                         }
 142                         snprintf(buffer, len, "%%any6");
 143                         break;
 144                 }
 145                 case AF_INET:
 146                 {
 147                         struct sockaddr_in* sin = (struct sockaddr_in*)addr;
 148                         u_int8_t zeroes[IPV4_LEN];
 149
 150                         memset(zeroes, 0, IPV4_LEN);
 151                         if (memcmp(zeroes, &(sin->sin_addr.s_addr), IPV4_LEN) &&
 152                                 inet_ntop(AF_INET, &sin->sin_addr, buffer, len))
 153                         {
 154                                 return;
 155                         }
 156                         /* fall through to default */
 157                 }
 158                 default:
 159                         snprintf(buffer, len, "%%any");
 160                         break;
 161         }
 162 }
 163
 164 static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
 165 {
 166         char buffer[INET6_ADDRSTRLEN];
 167
 168         msg_end->auth = push_string(msg, conn_end->auth);
 169         msg_end->auth2 = push_string(msg, conn_end->auth2);
 170         msg_end->id = push_string(msg, conn_end->id);
 171         msg_end->id2 = push_string(msg, conn_end->id2);
 172         msg_end->cert = push_string(msg, conn_end->cert);
 173         msg_end->cert2 = push_string(msg, conn_end->cert2);
 174         msg_end->ca = push_string(msg, conn_end->ca);
 175         msg_end->ca2 = push_string(msg, conn_end->ca2);
 176         msg_end->groups = push_string(msg, conn_end->groups);
 177         msg_end->updown = push_string(msg, conn_end->updown);
 178         ip_address2string(&conn_end->addr, buffer, sizeof(buffer));
 179         msg_end->address = push_string(msg, buffer);
 180         msg_end->ikeport = conn_end->ikeport;
 181         msg_end->subnets = push_string(msg, conn_end->subnet);
 182         msg_end->sourceip = push_string(msg, conn_end->sourceip);
 183         msg_end->sourceip_mask = conn_end->sourceip_mask;
 184         msg_end->sendcert = conn_end->sendcert;
 185         msg_end->hostaccess = conn_end->hostaccess;
 186         msg_end->tohost = !conn_end->has_client;
 187         msg_end->protocol = conn_end->protocol;
 188         msg_end->port = conn_end->port;
 189 }
 190
 191 int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
 192 {
 193         stroke_msg_t msg;
 194
 195         memset(&msg, 0, sizeof(msg));
 196         msg.type = STR_ADD_CONN;
 197         msg.length = offsetof(stroke_msg_t, buffer);
 198         msg.add_conn.ikev2 = conn->keyexchange != KEY_EXCHANGE_IKEV1;
 199         msg.add_conn.name = push_string(&msg, connection_name(conn));
 200
 201         /* PUBKEY is preferred to PSK and EAP */
 202         if (conn->policy & POLICY_PUBKEY)
 203         {
 204                 msg.add_conn.auth_method = AUTH_PUBKEY;
 205         }
 206         else if (conn->policy & POLICY_PSK)
 207         {
 208                 msg.add_conn.auth_method = AUTH_PSK;
 209         }
 210         else
 211         {
 212                 msg.add_conn.auth_method = AUTH_EAP;
 213         }
 214         msg.add_conn.eap_type = conn->eap_type;
 215         msg.add_conn.eap_vendor = conn->eap_vendor;
 216         msg.add_conn.eap_identity = push_string(&msg, conn->eap_identity);
 217         msg.add_conn.aaa_identity = push_string(&msg, conn->aaa_identity);
 218
 219         if (conn->policy & POLICY_TUNNEL)
 220         {
 221                 msg.add_conn.mode = MODE_TUNNEL;
 222         }
 223         else if (conn->policy & POLICY_BEET)
 224         {
 225                 msg.add_conn.mode = MODE_BEET;
 226         }
 227         else if (conn->policy & POLICY_PROXY)
 228         {
 229                 msg.add_conn.mode = MODE_TRANSPORT;
 230                 msg.add_conn.proxy_mode = TRUE;
 231         }
 232         else
 233         {
 234                 msg.add_conn.mode = MODE_TRANSPORT;
 235         }
 236
 237         if (!(conn->policy & POLICY_DONT_REKEY))
 238         {
 239                 msg.add_conn.rekey.reauth = (conn->policy & POLICY_DONT_REAUTH) == LEMPTY;
 240                 msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
 241                 msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
 242                 msg.add_conn.rekey.margin = conn->sa_rekey_margin;
 243                 msg.add_conn.rekey.life_bytes = conn->sa_ipsec_life_bytes;
 244                 msg.add_conn.rekey.margin_bytes = conn->sa_ipsec_margin_bytes;
 245                 msg.add_conn.rekey.life_packets = conn->sa_ipsec_life_packets;
 246                 msg.add_conn.rekey.margin_packets = conn->sa_ipsec_margin_packets;
 247                 msg.add_conn.rekey.tries = conn->sa_keying_tries;
 248                 msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
 249         }
 250         msg.add_conn.mobike = (conn->policy & POLICY_MOBIKE) != 0;
 251         msg.add_conn.force_encap = (conn->policy & POLICY_FORCE_ENCAP) != 0;
 252         msg.add_conn.ipcomp = (conn->policy & POLICY_COMPRESS) != 0;
 253         msg.add_conn.install_policy = conn->install_policy;
 254         msg.add_conn.crl_policy = cfg->setup.strictcrlpolicy;
 255         msg.add_conn.unique = cfg->setup.uniqueids;
 256         msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
 257         msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
 258         msg.add_conn.dpd.delay = conn->dpd_delay;
 259         msg.add_conn.dpd.action = conn->dpd_action;
 260         msg.add_conn.inactivity = conn->inactivity;
 261         msg.add_conn.ikeme.mediation = conn->me_mediation;
 262         msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
 263         msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
 264         msg.add_conn.reqid = conn->reqid;
 265         msg.add_conn.mark_in.value = conn->mark_in.value;
 266         msg.add_conn.mark_in.mask = conn->mark_in.mask;
 267         msg.add_conn.mark_out.value = conn->mark_out.value;
 268         msg.add_conn.mark_out.mask = conn->mark_out.mask;
 269
 270         starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
 271         starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
 272
 273         return send_stroke_msg(&msg);
 274 }
 275
 276 int starter_stroke_del_conn(starter_conn_t *conn)
 277 {
 278         stroke_msg_t msg;
 279
 280         msg.type = STR_DEL_CONN;
 281         msg.length = offsetof(stroke_msg_t, buffer);
 282         msg.del_conn.name = push_string(&msg, connection_name(conn));
 283         return send_stroke_msg(&msg);
 284 }
 285
 286 int starter_stroke_route_conn(starter_conn_t *conn)
 287 {
 288         stroke_msg_t msg;
 289
 290         msg.type = STR_ROUTE;
 291         msg.length = offsetof(stroke_msg_t, buffer);
 292         msg.route.name = push_string(&msg, connection_name(conn));
 293         return send_stroke_msg(&msg);
 294 }
 295
 296 int starter_stroke_initiate_conn(starter_conn_t *conn)
 297 {
 298         stroke_msg_t msg;
 299
 300         msg.type = STR_INITIATE;
 301         msg.length = offsetof(stroke_msg_t, buffer);
 302         msg.initiate.name = push_string(&msg, connection_name(conn));
 303         return send_stroke_msg(&msg);
 304 }
 305
 306 int starter_stroke_add_ca(starter_ca_t *ca)
 307 {
 308         stroke_msg_t msg;
 309
 310         msg.type = STR_ADD_CA;
 311         msg.length = offsetof(stroke_msg_t, buffer);
 312         msg.add_ca.name =        push_string(&msg, ca->name);
 313         msg.add_ca.cacert =      push_string(&msg, ca->cacert);
 314         msg.add_ca.crluri =      push_string(&msg, ca->crluri);
 315         msg.add_ca.crluri2 =     push_string(&msg, ca->crluri2);
 316         msg.add_ca.ocspuri =     push_string(&msg, ca->ocspuri);
 317         msg.add_ca.ocspuri2 =    push_string(&msg, ca->ocspuri2);
 318         msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
 319         return send_stroke_msg(&msg);
 320 }
 321
 322 int starter_stroke_del_ca(starter_ca_t *ca)
 323 {
 324         stroke_msg_t msg;
 325
 326         msg.type = STR_DEL_CA;
 327         msg.length = offsetof(stroke_msg_t, buffer);
 328         msg.del_ca.name = push_string(&msg, ca->name);
 329         return send_stroke_msg(&msg);
 330 }
 331
 332 int starter_stroke_configure(starter_config_t *cfg)
 333 {
 334         stroke_msg_t msg;
 335
 336         if (cfg->setup.cachecrls)
 337         {
 338                 msg.type = STR_CONFIG;
 339                 msg.length = offsetof(stroke_msg_t, buffer);
 340                 msg.config.cachecrl = 1;
 341                 return send_stroke_msg(&msg);
 342         }
 343         return 0;
 344 }
 345