Annotation of src/usr.bin/ssh/servconf.c, Revision 1.160
1.160 ! stevesk 1: /* $OpenBSD: servconf.c,v 1.159 2006/07/21 12:43:36 dtucker Exp $ */
1.1 deraadt 2: /*
1.26 deraadt 3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.34 markus 5: *
1.51 deraadt 6: * As far as I am concerned, the code I have written for this software
7: * can be used freely for any purpose. Any derived versions of this
8: * software must be clearly marked as such, and if the derived work is
9: * incompatible with the protocol description in the RFC file, it must be
10: * called by a name other than "ssh" or "Secure Shell".
1.26 deraadt 11: */
1.1 deraadt 12:
13: #include "includes.h"
1.152 stevesk 14:
15: #include <sys/types.h>
16: #include <sys/socket.h>
1.154 stevesk 17:
18: #include <netdb.h>
1.160 ! stevesk 19: #include <string.h>
1.155 stevesk 20: #include <unistd.h>
1.1 deraadt 21:
22: #include "ssh.h"
1.62 markus 23: #include "log.h"
1.1 deraadt 24: #include "servconf.h"
25: #include "xmalloc.h"
1.33 markus 26: #include "compat.h"
1.60 markus 27: #include "pathnames.h"
1.62 markus 28: #include "misc.h"
29: #include "cipher.h"
1.66 markus 30: #include "kex.h"
31: #include "mac.h"
1.153 dtucker 32: #include "match.h"
1.156 dtucker 33: #include "channels.h"
1.1 deraadt 34:
1.84 itojun 35: static void add_listen_addr(ServerOptions *, char *, u_short);
36: static void add_one_listen_addr(ServerOptions *, char *, u_short);
1.29 markus 37:
1.102 provos 38: /* Use of privilege separation or not */
39: extern int use_privsep;
1.153 dtucker 40: extern Buffer cfg;
1.62 markus 41:
1.1 deraadt 42: /* Initializes the server options to their default values. */
43:
1.34 markus 44: void
1.25 markus 45: initialize_server_options(ServerOptions *options)
1.1 deraadt 46: {
1.25 markus 47: memset(options, 0, sizeof(*options));
1.29 markus 48: options->num_ports = 0;
49: options->ports_from_cmdline = 0;
50: options->listen_addrs = NULL;
1.138 djm 51: options->address_family = -1;
1.54 markus 52: options->num_host_key_files = 0;
1.36 markus 53: options->pid_file = NULL;
1.25 markus 54: options->server_key_bits = -1;
55: options->login_grace_time = -1;
56: options->key_regeneration_time = -1;
1.67 markus 57: options->permit_root_login = PERMIT_NOT_SET;
1.25 markus 58: options->ignore_rhosts = -1;
59: options->ignore_user_known_hosts = -1;
60: options->print_motd = -1;
1.72 stevesk 61: options->print_lastlog = -1;
1.25 markus 62: options->x11_forwarding = -1;
63: options->x11_display_offset = -1;
1.99 stevesk 64: options->x11_use_localhost = -1;
1.42 markus 65: options->xauth_location = NULL;
1.25 markus 66: options->strict_modes = -1;
1.129 markus 67: options->tcp_keep_alive = -1;
1.101 markus 68: options->log_facility = SYSLOG_FACILITY_NOT_SET;
69: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.25 markus 70: options->rhosts_rsa_authentication = -1;
1.75 markus 71: options->hostbased_authentication = -1;
72: options->hostbased_uses_name_from_packet_only = -1;
1.25 markus 73: options->rsa_authentication = -1;
1.54 markus 74: options->pubkey_authentication = -1;
1.25 markus 75: options->kerberos_authentication = -1;
76: options->kerberos_or_local_passwd = -1;
77: options->kerberos_ticket_cleanup = -1;
1.130 jakob 78: options->kerberos_get_afs_token = -1;
1.125 markus 79: options->gss_authentication=-1;
80: options->gss_cleanup_creds = -1;
1.25 markus 81: options->password_authentication = -1;
1.52 markus 82: options->kbd_interactive_authentication = -1;
1.80 markus 83: options->challenge_response_authentication = -1;
1.25 markus 84: options->permit_empty_passwd = -1;
1.113 markus 85: options->permit_user_env = -1;
1.25 markus 86: options->use_login = -1;
1.111 markus 87: options->compression = -1;
1.53 markus 88: options->allow_tcp_forwarding = -1;
1.25 markus 89: options->num_allow_users = 0;
90: options->num_deny_users = 0;
91: options->num_allow_groups = 0;
92: options->num_deny_groups = 0;
1.33 markus 93: options->ciphers = NULL;
1.66 markus 94: options->macs = NULL;
1.33 markus 95: options->protocol = SSH_PROTO_UNKNOWN;
1.38 markus 96: options->gateway_ports = -1;
1.43 jakob 97: options->num_subsystems = 0;
1.50 markus 98: options->max_startups_begin = -1;
99: options->max_startups_rate = -1;
1.46 markus 100: options->max_startups = -1;
1.133 dtucker 101: options->max_authtries = -1;
1.57 markus 102: options->banner = NULL;
1.122 markus 103: options->use_dns = -1;
1.77 beck 104: options->client_alive_interval = -1;
105: options->client_alive_count_max = -1;
1.82 markus 106: options->authorized_keys_file = NULL;
107: options->authorized_keys_file2 = NULL;
1.131 djm 108: options->num_accept_env = 0;
1.145 reyk 109: options->permit_tun = -1;
1.159 dtucker 110: options->num_permitted_opens = -1;
1.158 dtucker 111: options->adm_forced_command = NULL;
1.1 deraadt 112: }
113:
1.34 markus 114: void
1.25 markus 115: fill_default_server_options(ServerOptions *options)
1.1 deraadt 116: {
1.54 markus 117: if (options->protocol == SSH_PROTO_UNKNOWN)
118: options->protocol = SSH_PROTO_1|SSH_PROTO_2;
119: if (options->num_host_key_files == 0) {
120: /* fill default hostkeys for protocols */
121: if (options->protocol & SSH_PROTO_1)
1.97 stevesk 122: options->host_key_files[options->num_host_key_files++] =
123: _PATH_HOST_KEY_FILE;
124: if (options->protocol & SSH_PROTO_2) {
125: options->host_key_files[options->num_host_key_files++] =
126: _PATH_HOST_RSA_KEY_FILE;
127: options->host_key_files[options->num_host_key_files++] =
128: _PATH_HOST_DSA_KEY_FILE;
129: }
1.54 markus 130: }
1.29 markus 131: if (options->num_ports == 0)
132: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
133: if (options->listen_addrs == NULL)
1.76 stevesk 134: add_listen_addr(options, NULL, 0);
1.36 markus 135: if (options->pid_file == NULL)
1.60 markus 136: options->pid_file = _PATH_SSH_DAEMON_PID_FILE;
1.25 markus 137: if (options->server_key_bits == -1)
138: options->server_key_bits = 768;
139: if (options->login_grace_time == -1)
1.115 stevesk 140: options->login_grace_time = 120;
1.25 markus 141: if (options->key_regeneration_time == -1)
142: options->key_regeneration_time = 3600;
1.67 markus 143: if (options->permit_root_login == PERMIT_NOT_SET)
144: options->permit_root_login = PERMIT_YES;
1.25 markus 145: if (options->ignore_rhosts == -1)
1.30 markus 146: options->ignore_rhosts = 1;
1.25 markus 147: if (options->ignore_user_known_hosts == -1)
148: options->ignore_user_known_hosts = 0;
149: if (options->print_motd == -1)
150: options->print_motd = 1;
1.72 stevesk 151: if (options->print_lastlog == -1)
152: options->print_lastlog = 1;
1.25 markus 153: if (options->x11_forwarding == -1)
1.30 markus 154: options->x11_forwarding = 0;
1.25 markus 155: if (options->x11_display_offset == -1)
1.30 markus 156: options->x11_display_offset = 10;
1.99 stevesk 157: if (options->x11_use_localhost == -1)
158: options->x11_use_localhost = 1;
1.42 markus 159: if (options->xauth_location == NULL)
1.83 markus 160: options->xauth_location = _PATH_XAUTH;
1.25 markus 161: if (options->strict_modes == -1)
162: options->strict_modes = 1;
1.129 markus 163: if (options->tcp_keep_alive == -1)
164: options->tcp_keep_alive = 1;
1.101 markus 165: if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
1.25 markus 166: options->log_facility = SYSLOG_FACILITY_AUTH;
1.101 markus 167: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.58 markus 168: options->log_level = SYSLOG_LEVEL_INFO;
1.25 markus 169: if (options->rhosts_rsa_authentication == -1)
1.30 markus 170: options->rhosts_rsa_authentication = 0;
1.75 markus 171: if (options->hostbased_authentication == -1)
172: options->hostbased_authentication = 0;
173: if (options->hostbased_uses_name_from_packet_only == -1)
174: options->hostbased_uses_name_from_packet_only = 0;
1.25 markus 175: if (options->rsa_authentication == -1)
176: options->rsa_authentication = 1;
1.54 markus 177: if (options->pubkey_authentication == -1)
178: options->pubkey_authentication = 1;
1.25 markus 179: if (options->kerberos_authentication == -1)
1.107 markus 180: options->kerberos_authentication = 0;
1.25 markus 181: if (options->kerberos_or_local_passwd == -1)
182: options->kerberos_or_local_passwd = 1;
183: if (options->kerberos_ticket_cleanup == -1)
184: options->kerberos_ticket_cleanup = 1;
1.130 jakob 185: if (options->kerberos_get_afs_token == -1)
186: options->kerberos_get_afs_token = 0;
1.125 markus 187: if (options->gss_authentication == -1)
188: options->gss_authentication = 0;
189: if (options->gss_cleanup_creds == -1)
190: options->gss_cleanup_creds = 1;
1.25 markus 191: if (options->password_authentication == -1)
192: options->password_authentication = 1;
1.52 markus 193: if (options->kbd_interactive_authentication == -1)
194: options->kbd_interactive_authentication = 0;
1.80 markus 195: if (options->challenge_response_authentication == -1)
196: options->challenge_response_authentication = 1;
1.25 markus 197: if (options->permit_empty_passwd == -1)
1.30 markus 198: options->permit_empty_passwd = 0;
1.113 markus 199: if (options->permit_user_env == -1)
200: options->permit_user_env = 0;
1.25 markus 201: if (options->use_login == -1)
202: options->use_login = 0;
1.111 markus 203: if (options->compression == -1)
1.143 markus 204: options->compression = COMP_DELAYED;
1.53 markus 205: if (options->allow_tcp_forwarding == -1)
206: options->allow_tcp_forwarding = 1;
1.38 markus 207: if (options->gateway_ports == -1)
208: options->gateway_ports = 0;
1.46 markus 209: if (options->max_startups == -1)
210: options->max_startups = 10;
1.50 markus 211: if (options->max_startups_rate == -1)
212: options->max_startups_rate = 100; /* 100% */
213: if (options->max_startups_begin == -1)
214: options->max_startups_begin = options->max_startups;
1.133 dtucker 215: if (options->max_authtries == -1)
216: options->max_authtries = DEFAULT_AUTH_FAIL_MAX;
1.122 markus 217: if (options->use_dns == -1)
218: options->use_dns = 1;
1.77 beck 219: if (options->client_alive_interval == -1)
1.95 deraadt 220: options->client_alive_interval = 0;
1.77 beck 221: if (options->client_alive_count_max == -1)
222: options->client_alive_count_max = 3;
1.90 markus 223: if (options->authorized_keys_file2 == NULL) {
224: /* authorized_keys_file2 falls back to authorized_keys_file */
225: if (options->authorized_keys_file != NULL)
226: options->authorized_keys_file2 = options->authorized_keys_file;
227: else
228: options->authorized_keys_file2 = _PATH_SSH_USER_PERMITTED_KEYS2;
229: }
230: if (options->authorized_keys_file == NULL)
231: options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
1.145 reyk 232: if (options->permit_tun == -1)
1.146 reyk 233: options->permit_tun = SSH_TUNMODE_NO;
1.102 provos 234:
1.110 markus 235: /* Turn privilege separation on by default */
1.102 provos 236: if (use_privsep == -1)
1.110 markus 237: use_privsep = 1;
1.1 deraadt 238: }
239:
240: /* Keyword tokens. */
1.25 markus 241: typedef enum {
242: sBadOption, /* == unknown option */
243: sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
244: sPermitRootLogin, sLogFacility, sLogLevel,
1.124 markus 245: sRhostsRSAAuthentication, sRSAAuthentication,
1.25 markus 246: sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
1.130 jakob 247: sKerberosGetAFSToken,
1.123 markus 248: sKerberosTgtPassing, sChallengeResponseAuthentication,
1.138 djm 249: sPasswordAuthentication, sKbdInteractiveAuthentication,
250: sListenAddress, sAddressFamily,
1.72 stevesk 251: sPrintMotd, sPrintLastLog, sIgnoreRhosts,
1.99 stevesk 252: sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
1.129 markus 253: sStrictModes, sEmptyPasswd, sTCPKeepAlive,
1.113 markus 254: sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
1.53 markus 255: sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
1.66 markus 256: sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
1.133 dtucker 257: sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem,
258: sMaxStartups, sMaxAuthTries,
1.122 markus 259: sBanner, sUseDNS, sHostbasedAuthentication,
1.95 deraadt 260: sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
1.89 jakob 261: sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
1.145 reyk 262: sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
1.158 dtucker 263: sMatch, sPermitOpen, sForceCommand,
1.105 stevesk 264: sUsePrivilegeSeparation,
1.121 jakob 265: sDeprecated, sUnsupported
1.1 deraadt 266: } ServerOpCodes;
267:
1.153 dtucker 268: #define SSHCFG_GLOBAL 0x01 /* allowed in main section of sshd_config */
269: #define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
270: #define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
271:
1.1 deraadt 272: /* Textual representation of the tokens. */
1.25 markus 273: static struct {
274: const char *name;
275: ServerOpCodes opcode;
1.153 dtucker 276: u_int flags;
1.25 markus 277: } keywords[] = {
1.153 dtucker 278: { "port", sPort, SSHCFG_GLOBAL },
279: { "hostkey", sHostKeyFile, SSHCFG_GLOBAL },
280: { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */
281: { "pidfile", sPidFile, SSHCFG_GLOBAL },
282: { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL },
283: { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL },
284: { "keyregenerationinterval", sKeyRegenerationTime, SSHCFG_GLOBAL },
285: { "permitrootlogin", sPermitRootLogin, SSHCFG_GLOBAL },
286: { "syslogfacility", sLogFacility, SSHCFG_GLOBAL },
287: { "loglevel", sLogLevel, SSHCFG_GLOBAL },
288: { "rhostsauthentication", sDeprecated, SSHCFG_GLOBAL },
289: { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_GLOBAL },
290: { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_GLOBAL },
291: { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_GLOBAL },
292: { "rsaauthentication", sRSAAuthentication, SSHCFG_GLOBAL },
293: { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL },
294: { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */
1.123 markus 295: #ifdef KRB5
1.153 dtucker 296: { "kerberosauthentication", sKerberosAuthentication, SSHCFG_GLOBAL },
297: { "kerberosorlocalpasswd", sKerberosOrLocalPasswd, SSHCFG_GLOBAL },
298: { "kerberosticketcleanup", sKerberosTicketCleanup, SSHCFG_GLOBAL },
299: { "kerberosgetafstoken", sKerberosGetAFSToken, SSHCFG_GLOBAL },
1.121 jakob 300: #else
1.153 dtucker 301: { "kerberosauthentication", sUnsupported, SSHCFG_GLOBAL },
302: { "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
303: { "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
304: { "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
1.126 markus 305: #endif
1.153 dtucker 306: { "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
307: { "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 308: #ifdef GSSAPI
1.153 dtucker 309: { "gssapiauthentication", sGssAuthentication, SSHCFG_GLOBAL },
310: { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
1.125 markus 311: #else
1.153 dtucker 312: { "gssapiauthentication", sUnsupported, SSHCFG_GLOBAL },
313: { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
1.125 markus 314: #endif
1.153 dtucker 315: { "passwordauthentication", sPasswordAuthentication, SSHCFG_GLOBAL },
316: { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_GLOBAL },
317: { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL },
318: { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */
319: { "checkmail", sDeprecated, SSHCFG_GLOBAL },
320: { "listenaddress", sListenAddress, SSHCFG_GLOBAL },
321: { "addressfamily", sAddressFamily, SSHCFG_GLOBAL },
322: { "printmotd", sPrintMotd, SSHCFG_GLOBAL },
323: { "printlastlog", sPrintLastLog, SSHCFG_GLOBAL },
324: { "ignorerhosts", sIgnoreRhosts, SSHCFG_GLOBAL },
325: { "ignoreuserknownhosts", sIgnoreUserKnownHosts, SSHCFG_GLOBAL },
1.157 dtucker 326: { "x11forwarding", sX11Forwarding, SSHCFG_ALL },
327: { "x11displayoffset", sX11DisplayOffset, SSHCFG_ALL },
328: { "x11uselocalhost", sX11UseLocalhost, SSHCFG_ALL },
1.153 dtucker 329: { "xauthlocation", sXAuthLocation, SSHCFG_GLOBAL },
330: { "strictmodes", sStrictModes, SSHCFG_GLOBAL },
331: { "permitemptypasswords", sEmptyPasswd, SSHCFG_GLOBAL },
332: { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL },
333: { "uselogin", sUseLogin, SSHCFG_GLOBAL },
334: { "compression", sCompression, SSHCFG_GLOBAL },
335: { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL },
336: { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */
337: { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL },
338: { "allowusers", sAllowUsers, SSHCFG_GLOBAL },
339: { "denyusers", sDenyUsers, SSHCFG_GLOBAL },
340: { "allowgroups", sAllowGroups, SSHCFG_GLOBAL },
341: { "denygroups", sDenyGroups, SSHCFG_GLOBAL },
342: { "ciphers", sCiphers, SSHCFG_GLOBAL },
343: { "macs", sMacs, SSHCFG_GLOBAL },
344: { "protocol", sProtocol, SSHCFG_GLOBAL },
345: { "gatewayports", sGatewayPorts, SSHCFG_ALL },
346: { "subsystem", sSubsystem, SSHCFG_GLOBAL },
347: { "maxstartups", sMaxStartups, SSHCFG_GLOBAL },
348: { "maxauthtries", sMaxAuthTries, SSHCFG_GLOBAL },
349: { "banner", sBanner, SSHCFG_GLOBAL },
350: { "usedns", sUseDNS, SSHCFG_GLOBAL },
351: { "verifyreversemapping", sDeprecated, SSHCFG_GLOBAL },
352: { "reversemappingcheck", sDeprecated, SSHCFG_GLOBAL },
353: { "clientaliveinterval", sClientAliveInterval, SSHCFG_GLOBAL },
354: { "clientalivecountmax", sClientAliveCountMax, SSHCFG_GLOBAL },
355: { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_GLOBAL },
356: { "authorizedkeysfile2", sAuthorizedKeysFile2, SSHCFG_GLOBAL },
357: { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
358: { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL },
359: { "permittunnel", sPermitTunnel, SSHCFG_GLOBAL },
360: { "match", sMatch, SSHCFG_ALL },
1.156 dtucker 361: { "permitopen", sPermitOpen, SSHCFG_ALL },
1.158 dtucker 362: { "forcecommand", sForceCommand, SSHCFG_ALL },
1.153 dtucker 363: { NULL, sBadOption, 0 }
1.1 deraadt 364: };
365:
1.27 markus 366: /*
1.73 stevesk 367: * Returns the number of the token pointed to by cp or sBadOption.
1.27 markus 368: */
1.1 deraadt 369:
1.34 markus 370: static ServerOpCodes
1.25 markus 371: parse_token(const char *cp, const char *filename,
1.153 dtucker 372: int linenum, u_int *flags)
1.1 deraadt 373: {
1.55 markus 374: u_int i;
1.1 deraadt 375:
1.25 markus 376: for (i = 0; keywords[i].name; i++)
1.153 dtucker 377: if (strcasecmp(cp, keywords[i].name) == 0) {
378: *flags = keywords[i].flags;
1.25 markus 379: return keywords[i].opcode;
1.153 dtucker 380: }
1.25 markus 381:
1.78 stevesk 382: error("%s: line %d: Bad configuration option: %s",
383: filename, linenum, cp);
1.25 markus 384: return sBadOption;
1.1 deraadt 385: }
386:
1.84 itojun 387: static void
1.76 stevesk 388: add_listen_addr(ServerOptions *options, char *addr, u_short port)
1.74 stevesk 389: {
1.142 djm 390: u_int i;
1.74 stevesk 391:
392: if (options->num_ports == 0)
393: options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
1.138 djm 394: if (options->address_family == -1)
395: options->address_family = AF_UNSPEC;
1.76 stevesk 396: if (port == 0)
1.74 stevesk 397: for (i = 0; i < options->num_ports; i++)
398: add_one_listen_addr(options, addr, options->ports[i]);
399: else
1.76 stevesk 400: add_one_listen_addr(options, addr, port);
1.74 stevesk 401: }
402:
1.84 itojun 403: static void
1.74 stevesk 404: add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
1.29 markus 405: {
406: struct addrinfo hints, *ai, *aitop;
407: char strport[NI_MAXSERV];
408: int gaierr;
409:
1.74 stevesk 410: memset(&hints, 0, sizeof(hints));
1.138 djm 411: hints.ai_family = options->address_family;
1.74 stevesk 412: hints.ai_socktype = SOCK_STREAM;
413: hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
1.112 deraadt 414: snprintf(strport, sizeof strport, "%u", port);
1.74 stevesk 415: if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
416: fatal("bad addr or host: %s (%s)",
417: addr ? addr : "<NULL>",
418: gai_strerror(gaierr));
419: for (ai = aitop; ai->ai_next; ai = ai->ai_next)
420: ;
421: ai->ai_next = options->listen_addrs;
422: options->listen_addrs = aitop;
1.29 markus 423: }
424:
1.153 dtucker 425: /*
426: * The strategy for the Match blocks is that the config file is parsed twice.
427: *
428: * The first time is at startup. activep is initialized to 1 and the
429: * directives in the global context are processed and acted on. Hitting a
430: * Match directive unsets activep and the directives inside the block are
431: * checked for syntax only.
432: *
433: * The second time is after a connection has been established but before
434: * authentication. activep is initialized to 2 and global config directives
435: * are ignored since they have already been processed. If the criteria in a
436: * Match block is met, activep is set and the subsequent directives
437: * processed and actioned until EOF or another Match block unsets it. Any
438: * options set are copied into the main server config.
439: *
440: * Potential additions/improvements:
441: * - Add Match support for pre-kex directives, eg Protocol, Ciphers.
442: *
443: * - Add a Tag directive (idea from David Leonard) ala pf, eg:
444: * Match Address 192.168.0.*
445: * Tag trusted
446: * Match Group wheel
447: * Tag trusted
448: * Match Tag trusted
449: * AllowTcpForwarding yes
450: * GatewayPorts clientspecified
451: * [...]
452: *
453: * - Add a PermittedChannelRequests directive
454: * Match Group shell
455: * PermittedChannelRequests session,forwarded-tcpip
456: */
457:
458: static int
459: match_cfg_line(char **condition, int line, const char *user, const char *host,
460: const char *address)
461: {
462: int result = 1;
463: char *arg, *attrib, *cp = *condition;
464: size_t len;
465:
466: if (user == NULL)
467: debug3("checking syntax for 'Match %s'", cp);
468: else
469: debug3("checking match for '%s' user %s host %s addr %s", cp,
470: user ? user : "(null)", host ? host : "(null)",
471: address ? address : "(null)");
472:
473: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
474: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
475: error("Missing Match criteria for %s", attrib);
476: return -1;
477: }
478: len = strlen(arg);
479: if (strcasecmp(attrib, "user") == 0) {
480: if (!user) {
481: result = 0;
482: continue;
483: }
484: if (match_pattern_list(user, arg, len, 0) != 1)
485: result = 0;
486: else
487: debug("user %.100s matched 'User %.100s' at "
488: "line %d", user, arg, line);
489: } else if (strcasecmp(attrib, "host") == 0) {
490: if (!host) {
491: result = 0;
492: continue;
493: }
494: if (match_hostname(host, arg, len) != 1)
495: result = 0;
496: else
497: debug("connection from %.100s matched 'Host "
498: "%.100s' at line %d", host, arg, line);
499: } else if (strcasecmp(attrib, "address") == 0) {
500: debug("address '%s' arg '%s'", address, arg);
501: if (!address) {
502: result = 0;
503: continue;
504: }
505: if (match_hostname(address, arg, len) != 1)
506: result = 0;
507: else
508: debug("connection from %.100s matched 'Address "
509: "%.100s' at line %d", address, arg, line);
510: } else {
511: error("Unsupported Match attribute %s", attrib);
512: return -1;
513: }
514: }
515: if (user != NULL)
516: debug3("match %sfound", result ? "" : "not ");
517: *condition = cp;
518: return result;
519: }
520:
1.158 dtucker 521: #define WHITESPACE " \t\r\n"
522:
1.94 markus 523: int
524: process_server_config_line(ServerOptions *options, char *line,
1.153 dtucker 525: const char *filename, int linenum, int *activep, const char *user,
526: const char *host, const char *address)
1.1 deraadt 527: {
1.74 stevesk 528: char *cp, **charptr, *arg, *p;
1.153 dtucker 529: int cmdline = 0, *intptr, value, n;
1.25 markus 530: ServerOpCodes opcode;
1.139 djm 531: u_short port;
1.153 dtucker 532: u_int i, flags = 0;
1.151 djm 533: size_t len;
1.25 markus 534:
1.94 markus 535: cp = line;
1.148 dtucker 536: if ((arg = strdelim(&cp)) == NULL)
1.147 djm 537: return 0;
1.94 markus 538: /* Ignore leading whitespace */
539: if (*arg == '\0')
540: arg = strdelim(&cp);
541: if (!arg || !*arg || *arg == '#')
542: return 0;
543: intptr = NULL;
544: charptr = NULL;
1.153 dtucker 545: opcode = parse_token(arg, filename, linenum, &flags);
546:
547: if (activep == NULL) { /* We are processing a command line directive */
548: cmdline = 1;
549: activep = &cmdline;
550: }
551: if (*activep && opcode != sMatch)
552: debug3("%s:%d setting %s %s", filename, linenum, arg, cp);
553: if (*activep == 0 && !(flags & SSHCFG_MATCH)) {
554: if (user == NULL) {
555: fatal("%s line %d: Directive '%s' is not allowed "
556: "within a Match block", filename, linenum, arg);
557: } else { /* this is a directive we have already processed */
558: while (arg)
559: arg = strdelim(&cp);
560: return 0;
561: }
562: }
563:
1.94 markus 564: switch (opcode) {
565: case sBadOption:
566: return -1;
567: case sPort:
568: /* ignore ports from configfile if cmdline specifies ports */
569: if (options->ports_from_cmdline)
570: return 0;
571: if (options->listen_addrs != NULL)
572: fatal("%s line %d: ports must be specified before "
1.98 stevesk 573: "ListenAddress.", filename, linenum);
1.94 markus 574: if (options->num_ports >= MAX_PORTS)
575: fatal("%s line %d: too many ports.",
576: filename, linenum);
1.48 provos 577: arg = strdelim(&cp);
1.94 markus 578: if (!arg || *arg == '\0')
579: fatal("%s line %d: missing port number.",
580: filename, linenum);
581: options->ports[options->num_ports++] = a2port(arg);
582: if (options->ports[options->num_ports-1] == 0)
583: fatal("%s line %d: Badly formatted port number.",
584: filename, linenum);
585: break;
1.29 markus 586:
1.94 markus 587: case sServerKeyBits:
588: intptr = &options->server_key_bits;
1.25 markus 589: parse_int:
1.94 markus 590: arg = strdelim(&cp);
591: if (!arg || *arg == '\0')
592: fatal("%s line %d: missing integer value.",
593: filename, linenum);
594: value = atoi(arg);
1.153 dtucker 595: if (*activep && *intptr == -1)
1.94 markus 596: *intptr = value;
597: break;
1.25 markus 598:
1.94 markus 599: case sLoginGraceTime:
600: intptr = &options->login_grace_time;
1.81 stevesk 601: parse_time:
1.94 markus 602: arg = strdelim(&cp);
603: if (!arg || *arg == '\0')
604: fatal("%s line %d: missing time value.",
605: filename, linenum);
606: if ((value = convtime(arg)) == -1)
607: fatal("%s line %d: invalid time value.",
608: filename, linenum);
609: if (*intptr == -1)
610: *intptr = value;
611: break;
612:
613: case sKeyRegenerationTime:
614: intptr = &options->key_regeneration_time;
615: goto parse_time;
616:
617: case sListenAddress:
618: arg = strdelim(&cp);
1.139 djm 619: if (arg == NULL || *arg == '\0')
620: fatal("%s line %d: missing address",
1.94 markus 621: filename, linenum);
1.144 dtucker 622: /* check for bare IPv6 address: no "[]" and 2 or more ":" */
623: if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL
624: && strchr(p+1, ':') != NULL) {
625: add_listen_addr(options, arg, 0);
626: break;
627: }
1.139 djm 628: p = hpdelim(&arg);
629: if (p == NULL)
630: fatal("%s line %d: bad address:port usage",
631: filename, linenum);
632: p = cleanhostname(p);
633: if (arg == NULL)
634: port = 0;
635: else if ((port = a2port(arg)) == 0)
636: fatal("%s line %d: bad port number", filename, linenum);
637:
638: add_listen_addr(options, p, port);
1.25 markus 639:
1.138 djm 640: break;
641:
642: case sAddressFamily:
643: arg = strdelim(&cp);
1.141 markus 644: if (!arg || *arg == '\0')
645: fatal("%s line %d: missing address family.",
646: filename, linenum);
1.138 djm 647: intptr = &options->address_family;
648: if (options->listen_addrs != NULL)
649: fatal("%s line %d: address family must be specified before "
650: "ListenAddress.", filename, linenum);
651: if (strcasecmp(arg, "inet") == 0)
652: value = AF_INET;
653: else if (strcasecmp(arg, "inet6") == 0)
654: value = AF_INET6;
655: else if (strcasecmp(arg, "any") == 0)
656: value = AF_UNSPEC;
657: else
658: fatal("%s line %d: unsupported address family \"%s\".",
659: filename, linenum, arg);
660: if (*intptr == -1)
661: *intptr = value;
1.94 markus 662: break;
663:
664: case sHostKeyFile:
665: intptr = &options->num_host_key_files;
666: if (*intptr >= MAX_HOSTKEYS)
667: fatal("%s line %d: too many host keys specified (max %d).",
668: filename, linenum, MAX_HOSTKEYS);
669: charptr = &options->host_key_files[*intptr];
670: parse_filename:
671: arg = strdelim(&cp);
672: if (!arg || *arg == '\0')
673: fatal("%s line %d: missing file name.",
674: filename, linenum);
1.153 dtucker 675: if (*activep && *charptr == NULL) {
1.94 markus 676: *charptr = tilde_expand_filename(arg, getuid());
677: /* increase optional counter */
678: if (intptr != NULL)
679: *intptr = *intptr + 1;
680: }
681: break;
1.76 stevesk 682:
1.94 markus 683: case sPidFile:
684: charptr = &options->pid_file;
685: goto parse_filename;
1.25 markus 686:
1.94 markus 687: case sPermitRootLogin:
688: intptr = &options->permit_root_login;
689: arg = strdelim(&cp);
690: if (!arg || *arg == '\0')
691: fatal("%s line %d: missing yes/"
692: "without-password/forced-commands-only/no "
693: "argument.", filename, linenum);
694: value = 0; /* silence compiler */
695: if (strcmp(arg, "without-password") == 0)
696: value = PERMIT_NO_PASSWD;
697: else if (strcmp(arg, "forced-commands-only") == 0)
698: value = PERMIT_FORCED_ONLY;
699: else if (strcmp(arg, "yes") == 0)
700: value = PERMIT_YES;
701: else if (strcmp(arg, "no") == 0)
702: value = PERMIT_NO;
703: else
704: fatal("%s line %d: Bad yes/"
705: "without-password/forced-commands-only/no "
706: "argument: %s", filename, linenum, arg);
707: if (*intptr == -1)
708: *intptr = value;
709: break;
1.36 markus 710:
1.94 markus 711: case sIgnoreRhosts:
712: intptr = &options->ignore_rhosts;
1.25 markus 713: parse_flag:
1.94 markus 714: arg = strdelim(&cp);
715: if (!arg || *arg == '\0')
716: fatal("%s line %d: missing yes/no argument.",
717: filename, linenum);
718: value = 0; /* silence compiler */
719: if (strcmp(arg, "yes") == 0)
720: value = 1;
721: else if (strcmp(arg, "no") == 0)
722: value = 0;
723: else
724: fatal("%s line %d: Bad yes/no argument: %s",
725: filename, linenum, arg);
1.153 dtucker 726: if (*activep && *intptr == -1)
1.94 markus 727: *intptr = value;
728: break;
729:
730: case sIgnoreUserKnownHosts:
731: intptr = &options->ignore_user_known_hosts;
732: goto parse_flag;
733:
734: case sRhostsRSAAuthentication:
735: intptr = &options->rhosts_rsa_authentication;
736: goto parse_flag;
737:
738: case sHostbasedAuthentication:
739: intptr = &options->hostbased_authentication;
740: goto parse_flag;
741:
742: case sHostbasedUsesNameFromPacketOnly:
743: intptr = &options->hostbased_uses_name_from_packet_only;
744: goto parse_flag;
745:
746: case sRSAAuthentication:
747: intptr = &options->rsa_authentication;
748: goto parse_flag;
749:
750: case sPubkeyAuthentication:
751: intptr = &options->pubkey_authentication;
752: goto parse_flag;
1.119 jakob 753:
1.94 markus 754: case sKerberosAuthentication:
755: intptr = &options->kerberos_authentication;
756: goto parse_flag;
757:
758: case sKerberosOrLocalPasswd:
759: intptr = &options->kerberos_or_local_passwd;
760: goto parse_flag;
761:
762: case sKerberosTicketCleanup:
763: intptr = &options->kerberos_ticket_cleanup;
1.130 jakob 764: goto parse_flag;
765:
766: case sKerberosGetAFSToken:
767: intptr = &options->kerberos_get_afs_token;
1.125 markus 768: goto parse_flag;
769:
770: case sGssAuthentication:
771: intptr = &options->gss_authentication;
772: goto parse_flag;
773:
774: case sGssCleanupCreds:
775: intptr = &options->gss_cleanup_creds;
1.94 markus 776: goto parse_flag;
777:
778: case sPasswordAuthentication:
779: intptr = &options->password_authentication;
780: goto parse_flag;
781:
782: case sKbdInteractiveAuthentication:
783: intptr = &options->kbd_interactive_authentication;
784: goto parse_flag;
785:
786: case sChallengeResponseAuthentication:
787: intptr = &options->challenge_response_authentication;
788: goto parse_flag;
789:
790: case sPrintMotd:
791: intptr = &options->print_motd;
792: goto parse_flag;
793:
794: case sPrintLastLog:
795: intptr = &options->print_lastlog;
796: goto parse_flag;
797:
798: case sX11Forwarding:
799: intptr = &options->x11_forwarding;
800: goto parse_flag;
801:
802: case sX11DisplayOffset:
803: intptr = &options->x11_display_offset;
804: goto parse_int;
1.99 stevesk 805:
806: case sX11UseLocalhost:
807: intptr = &options->x11_use_localhost;
808: goto parse_flag;
1.94 markus 809:
810: case sXAuthLocation:
811: charptr = &options->xauth_location;
812: goto parse_filename;
813:
814: case sStrictModes:
815: intptr = &options->strict_modes;
816: goto parse_flag;
817:
1.129 markus 818: case sTCPKeepAlive:
819: intptr = &options->tcp_keep_alive;
1.94 markus 820: goto parse_flag;
821:
822: case sEmptyPasswd:
823: intptr = &options->permit_empty_passwd;
1.113 markus 824: goto parse_flag;
825:
826: case sPermitUserEnvironment:
827: intptr = &options->permit_user_env;
1.94 markus 828: goto parse_flag;
829:
830: case sUseLogin:
831: intptr = &options->use_login;
1.111 markus 832: goto parse_flag;
833:
834: case sCompression:
835: intptr = &options->compression;
1.143 markus 836: arg = strdelim(&cp);
837: if (!arg || *arg == '\0')
838: fatal("%s line %d: missing yes/no/delayed "
839: "argument.", filename, linenum);
840: value = 0; /* silence compiler */
841: if (strcmp(arg, "delayed") == 0)
842: value = COMP_DELAYED;
843: else if (strcmp(arg, "yes") == 0)
844: value = COMP_ZLIB;
845: else if (strcmp(arg, "no") == 0)
846: value = COMP_NONE;
847: else
848: fatal("%s line %d: Bad yes/no/delayed "
849: "argument: %s", filename, linenum, arg);
850: if (*intptr == -1)
851: *intptr = value;
852: break;
1.94 markus 853:
854: case sGatewayPorts:
855: intptr = &options->gateway_ports;
1.139 djm 856: arg = strdelim(&cp);
857: if (!arg || *arg == '\0')
858: fatal("%s line %d: missing yes/no/clientspecified "
859: "argument.", filename, linenum);
860: value = 0; /* silence compiler */
861: if (strcmp(arg, "clientspecified") == 0)
862: value = 2;
863: else if (strcmp(arg, "yes") == 0)
864: value = 1;
865: else if (strcmp(arg, "no") == 0)
866: value = 0;
867: else
868: fatal("%s line %d: Bad yes/no/clientspecified "
869: "argument: %s", filename, linenum, arg);
870: if (*intptr == -1)
871: *intptr = value;
872: break;
1.25 markus 873:
1.122 markus 874: case sUseDNS:
875: intptr = &options->use_dns;
1.94 markus 876: goto parse_flag;
1.53 markus 877:
1.94 markus 878: case sLogFacility:
879: intptr = (int *) &options->log_facility;
880: arg = strdelim(&cp);
881: value = log_facility_number(arg);
1.101 markus 882: if (value == SYSLOG_FACILITY_NOT_SET)
1.94 markus 883: fatal("%.200s line %d: unsupported log facility '%s'",
884: filename, linenum, arg ? arg : "<NONE>");
885: if (*intptr == -1)
886: *intptr = (SyslogFacility) value;
887: break;
1.25 markus 888:
1.94 markus 889: case sLogLevel:
890: intptr = (int *) &options->log_level;
891: arg = strdelim(&cp);
892: value = log_level_number(arg);
1.101 markus 893: if (value == SYSLOG_LEVEL_NOT_SET)
1.94 markus 894: fatal("%.200s line %d: unsupported log level '%s'",
895: filename, linenum, arg ? arg : "<NONE>");
896: if (*intptr == -1)
897: *intptr = (LogLevel) value;
898: break;
899:
900: case sAllowTcpForwarding:
901: intptr = &options->allow_tcp_forwarding;
902: goto parse_flag;
1.102 provos 903:
904: case sUsePrivilegeSeparation:
905: intptr = &use_privsep;
906: goto parse_flag;
1.94 markus 907:
908: case sAllowUsers:
909: while ((arg = strdelim(&cp)) && *arg != '\0') {
910: if (options->num_allow_users >= MAX_ALLOW_USERS)
911: fatal("%s line %d: too many allow users.",
912: filename, linenum);
1.112 deraadt 913: options->allow_users[options->num_allow_users++] =
914: xstrdup(arg);
1.94 markus 915: }
916: break;
1.25 markus 917:
1.94 markus 918: case sDenyUsers:
919: while ((arg = strdelim(&cp)) && *arg != '\0') {
920: if (options->num_deny_users >= MAX_DENY_USERS)
921: fatal( "%s line %d: too many deny users.",
922: filename, linenum);
1.112 deraadt 923: options->deny_users[options->num_deny_users++] =
924: xstrdup(arg);
1.94 markus 925: }
926: break;
1.25 markus 927:
1.94 markus 928: case sAllowGroups:
929: while ((arg = strdelim(&cp)) && *arg != '\0') {
930: if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
931: fatal("%s line %d: too many allow groups.",
932: filename, linenum);
1.112 deraadt 933: options->allow_groups[options->num_allow_groups++] =
934: xstrdup(arg);
1.94 markus 935: }
936: break;
1.33 markus 937:
1.94 markus 938: case sDenyGroups:
939: while ((arg = strdelim(&cp)) && *arg != '\0') {
940: if (options->num_deny_groups >= MAX_DENY_GROUPS)
941: fatal("%s line %d: too many deny groups.",
942: filename, linenum);
943: options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
944: }
945: break;
1.66 markus 946:
1.94 markus 947: case sCiphers:
948: arg = strdelim(&cp);
949: if (!arg || *arg == '\0')
950: fatal("%s line %d: Missing argument.", filename, linenum);
951: if (!ciphers_valid(arg))
952: fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
953: filename, linenum, arg ? arg : "<NONE>");
954: if (options->ciphers == NULL)
955: options->ciphers = xstrdup(arg);
956: break;
1.33 markus 957:
1.94 markus 958: case sMacs:
959: arg = strdelim(&cp);
960: if (!arg || *arg == '\0')
961: fatal("%s line %d: Missing argument.", filename, linenum);
962: if (!mac_valid(arg))
963: fatal("%s line %d: Bad SSH2 mac spec '%s'.",
964: filename, linenum, arg ? arg : "<NONE>");
965: if (options->macs == NULL)
966: options->macs = xstrdup(arg);
967: break;
1.43 jakob 968:
1.94 markus 969: case sProtocol:
970: intptr = &options->protocol;
971: arg = strdelim(&cp);
972: if (!arg || *arg == '\0')
973: fatal("%s line %d: Missing argument.", filename, linenum);
974: value = proto_spec(arg);
975: if (value == SSH_PROTO_UNKNOWN)
976: fatal("%s line %d: Bad protocol spec '%s'.",
1.95 deraadt 977: filename, linenum, arg ? arg : "<NONE>");
1.94 markus 978: if (*intptr == SSH_PROTO_UNKNOWN)
979: *intptr = value;
980: break;
981:
982: case sSubsystem:
983: if (options->num_subsystems >= MAX_SUBSYSTEMS) {
984: fatal("%s line %d: too many subsystems defined.",
1.95 deraadt 985: filename, linenum);
1.94 markus 986: }
987: arg = strdelim(&cp);
988: if (!arg || *arg == '\0')
989: fatal("%s line %d: Missing subsystem name.",
1.95 deraadt 990: filename, linenum);
1.153 dtucker 991: if (!*activep) {
992: arg = strdelim(&cp);
993: break;
994: }
1.94 markus 995: for (i = 0; i < options->num_subsystems; i++)
996: if (strcmp(arg, options->subsystem_name[i]) == 0)
997: fatal("%s line %d: Subsystem '%s' already defined.",
1.95 deraadt 998: filename, linenum, arg);
1.94 markus 999: options->subsystem_name[options->num_subsystems] = xstrdup(arg);
1000: arg = strdelim(&cp);
1001: if (!arg || *arg == '\0')
1002: fatal("%s line %d: Missing subsystem command.",
1.95 deraadt 1003: filename, linenum);
1.94 markus 1004: options->subsystem_command[options->num_subsystems] = xstrdup(arg);
1.151 djm 1005:
1006: /* Collect arguments (separate to executable) */
1007: p = xstrdup(arg);
1008: len = strlen(p) + 1;
1009: while ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
1010: len += 1 + strlen(arg);
1011: p = xrealloc(p, 1, len);
1012: strlcat(p, " ", len);
1013: strlcat(p, arg, len);
1014: }
1015: options->subsystem_args[options->num_subsystems] = p;
1.94 markus 1016: options->num_subsystems++;
1017: break;
1.46 markus 1018:
1.94 markus 1019: case sMaxStartups:
1020: arg = strdelim(&cp);
1021: if (!arg || *arg == '\0')
1022: fatal("%s line %d: Missing MaxStartups spec.",
1.95 deraadt 1023: filename, linenum);
1.94 markus 1024: if ((n = sscanf(arg, "%d:%d:%d",
1025: &options->max_startups_begin,
1026: &options->max_startups_rate,
1027: &options->max_startups)) == 3) {
1028: if (options->max_startups_begin >
1029: options->max_startups ||
1030: options->max_startups_rate > 100 ||
1031: options->max_startups_rate < 1)
1.50 markus 1032: fatal("%s line %d: Illegal MaxStartups spec.",
1.87 stevesk 1033: filename, linenum);
1.94 markus 1034: } else if (n != 1)
1035: fatal("%s line %d: Illegal MaxStartups spec.",
1036: filename, linenum);
1037: else
1038: options->max_startups = options->max_startups_begin;
1039: break;
1.133 dtucker 1040:
1041: case sMaxAuthTries:
1042: intptr = &options->max_authtries;
1043: goto parse_int;
1.94 markus 1044:
1045: case sBanner:
1046: charptr = &options->banner;
1047: goto parse_filename;
1048: /*
1049: * These options can contain %X options expanded at
1050: * connect time, so that you can specify paths like:
1051: *
1052: * AuthorizedKeysFile /etc/ssh_keys/%u
1053: */
1054: case sAuthorizedKeysFile:
1055: case sAuthorizedKeysFile2:
1056: charptr = (opcode == sAuthorizedKeysFile ) ?
1057: &options->authorized_keys_file :
1058: &options->authorized_keys_file2;
1059: goto parse_filename;
1060:
1061: case sClientAliveInterval:
1062: intptr = &options->client_alive_interval;
1063: goto parse_time;
1064:
1065: case sClientAliveCountMax:
1066: intptr = &options->client_alive_count_max;
1067: goto parse_int;
1.131 djm 1068:
1069: case sAcceptEnv:
1070: while ((arg = strdelim(&cp)) && *arg != '\0') {
1071: if (strchr(arg, '=') != NULL)
1072: fatal("%s line %d: Invalid environment name.",
1073: filename, linenum);
1074: if (options->num_accept_env >= MAX_ACCEPT_ENV)
1075: fatal("%s line %d: too many allow env.",
1076: filename, linenum);
1.153 dtucker 1077: if (!*activep)
1078: break;
1.131 djm 1079: options->accept_env[options->num_accept_env++] =
1080: xstrdup(arg);
1081: }
1082: break;
1.145 reyk 1083:
1084: case sPermitTunnel:
1085: intptr = &options->permit_tun;
1.146 reyk 1086: arg = strdelim(&cp);
1087: if (!arg || *arg == '\0')
1088: fatal("%s line %d: Missing yes/point-to-point/"
1089: "ethernet/no argument.", filename, linenum);
1090: value = 0; /* silence compiler */
1091: if (strcasecmp(arg, "ethernet") == 0)
1092: value = SSH_TUNMODE_ETHERNET;
1093: else if (strcasecmp(arg, "point-to-point") == 0)
1094: value = SSH_TUNMODE_POINTOPOINT;
1095: else if (strcasecmp(arg, "yes") == 0)
1096: value = SSH_TUNMODE_YES;
1097: else if (strcasecmp(arg, "no") == 0)
1098: value = SSH_TUNMODE_NO;
1099: else
1100: fatal("%s line %d: Bad yes/point-to-point/ethernet/"
1101: "no argument: %s", filename, linenum, arg);
1102: if (*intptr == -1)
1103: *intptr = value;
1104: break;
1.94 markus 1105:
1.153 dtucker 1106: case sMatch:
1107: if (cmdline)
1108: fatal("Match directive not supported as a command-line "
1109: "option");
1110: value = match_cfg_line(&cp, linenum, user, host, address);
1111: if (value < 0)
1112: fatal("%s line %d: Bad Match condition", filename,
1113: linenum);
1114: *activep = value;
1.156 dtucker 1115: break;
1116:
1117: case sPermitOpen:
1118: arg = strdelim(&cp);
1119: if (!arg || *arg == '\0')
1120: fatal("%s line %d: missing PermitOpen specification",
1121: filename, linenum);
1122: if (strcmp(arg, "any") == 0) {
1.159 dtucker 1123: if (*activep) {
1.156 dtucker 1124: channel_clear_adm_permitted_opens();
1.159 dtucker 1125: options->num_permitted_opens = 0;
1126: }
1.156 dtucker 1127: break;
1128: }
1.159 dtucker 1129: for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) {
1130: p = hpdelim(&arg);
1131: if (p == NULL)
1132: fatal("%s line %d: missing host in PermitOpen",
1133: filename, linenum);
1134: p = cleanhostname(p);
1135: if (arg == NULL || (port = a2port(arg)) == 0)
1136: fatal("%s line %d: bad port number in "
1137: "PermitOpen", filename, linenum);
1138: if (*activep && options->num_permitted_opens == -1) {
1139: channel_clear_adm_permitted_opens();
1140: options->num_permitted_opens =
1141: channel_add_adm_permitted_opens(p, port);
1142: }
1143: }
1.153 dtucker 1144: break;
1145:
1.158 dtucker 1146: case sForceCommand:
1147: if (cp == NULL)
1148: fatal("%.200s line %d: Missing argument.", filename,
1149: linenum);
1150: len = strspn(cp, WHITESPACE);
1151: if (*activep && options->adm_forced_command == NULL)
1152: options->adm_forced_command = xstrdup(cp + len);
1153: return 0;
1154:
1.94 markus 1155: case sDeprecated:
1.117 itojun 1156: logit("%s line %d: Deprecated option %s",
1.121 jakob 1157: filename, linenum, arg);
1158: while (arg)
1159: arg = strdelim(&cp);
1160: break;
1161:
1162: case sUnsupported:
1163: logit("%s line %d: Unsupported option %s",
1.94 markus 1164: filename, linenum, arg);
1165: while (arg)
1166: arg = strdelim(&cp);
1167: break;
1168:
1169: default:
1170: fatal("%s line %d: Missing handler for opcode %s (%d)",
1171: filename, linenum, arg, opcode);
1172: }
1173: if ((arg = strdelim(&cp)) != NULL && *arg != '\0')
1174: fatal("%s line %d: garbage at end of line; \"%.200s\".",
1175: filename, linenum, arg);
1176: return 0;
1177: }
1178:
1179: /* Reads the server configuration file. */
1.25 markus 1180:
1.94 markus 1181: void
1.134 djm 1182: load_server_config(const char *filename, Buffer *conf)
1.94 markus 1183: {
1.134 djm 1184: char line[1024], *cp;
1.94 markus 1185: FILE *f;
1.81 stevesk 1186:
1.134 djm 1187: debug2("%s: filename %s", __func__, filename);
1188: if ((f = fopen(filename, "r")) == NULL) {
1.94 markus 1189: perror(filename);
1190: exit(1);
1191: }
1.134 djm 1192: buffer_clear(conf);
1193: while (fgets(line, sizeof(line), f)) {
1194: /*
1195: * Trim out comments and strip whitespace
1.135 deraadt 1196: * NB - preserve newlines, they are needed to reproduce
1.134 djm 1197: * line numbers later for error messages
1198: */
1199: if ((cp = strchr(line, '#')) != NULL)
1200: memcpy(cp, "\n", 2);
1201: cp = line + strspn(line, " \t\r");
1202:
1203: buffer_append(conf, cp, strlen(cp));
1204: }
1205: buffer_append(conf, "\0", 1);
1206: fclose(f);
1207: debug2("%s: done config len = %d", __func__, buffer_len(conf));
1208: }
1209:
1210: void
1.153 dtucker 1211: parse_server_match_config(ServerOptions *options, const char *user,
1212: const char *host, const char *address)
1213: {
1214: ServerOptions mo;
1215:
1216: initialize_server_options(&mo);
1217: parse_server_config(&mo, "reprocess config", &cfg, user, host, address);
1218: copy_set_server_options(options, &mo);
1219: }
1220:
1221: /* Copy any (supported) values that are set */
1222: void
1223: copy_set_server_options(ServerOptions *dst, ServerOptions *src)
1224: {
1225: if (src->allow_tcp_forwarding != -1)
1226: dst->allow_tcp_forwarding = src->allow_tcp_forwarding;
1227: if (src->gateway_ports != -1)
1228: dst->gateway_ports = src->gateway_ports;
1.158 dtucker 1229: if (src->adm_forced_command != NULL) {
1230: if (dst->adm_forced_command != NULL)
1231: xfree(dst->adm_forced_command);
1232: dst->adm_forced_command = src->adm_forced_command;
1233: }
1.157 dtucker 1234: if (src->x11_display_offset != -1)
1235: dst->x11_display_offset = src->x11_display_offset;
1236: if (src->x11_forwarding != -1)
1237: dst->x11_forwarding = src->x11_forwarding;
1238: if (src->x11_use_localhost != -1)
1239: dst->x11_use_localhost = src->x11_use_localhost;
1.153 dtucker 1240: }
1241:
1242: void
1243: parse_server_config(ServerOptions *options, const char *filename, Buffer *conf,
1244: const char *user, const char *host, const char *address)
1.134 djm 1245: {
1.153 dtucker 1246: int active, linenum, bad_options = 0;
1.136 dtucker 1247: char *cp, *obuf, *cbuf;
1.134 djm 1248:
1249: debug2("%s: config %s len %d", __func__, filename, buffer_len(conf));
1250:
1.136 dtucker 1251: obuf = cbuf = xstrdup(buffer_ptr(conf));
1.153 dtucker 1252: active = user ? 0 : 1;
1.137 dtucker 1253: linenum = 1;
1.140 deraadt 1254: while ((cp = strsep(&cbuf, "\n")) != NULL) {
1.134 djm 1255: if (process_server_config_line(options, cp, filename,
1.153 dtucker 1256: linenum++, &active, user, host, address) != 0)
1.94 markus 1257: bad_options++;
1.1 deraadt 1258: }
1.136 dtucker 1259: xfree(obuf);
1.78 stevesk 1260: if (bad_options > 0)
1261: fatal("%s: terminating, %d bad configuration options",
1262: filename, bad_options);
1.1 deraadt 1263: }
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