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