X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/b06b11ad56f83ad92a22db5a587fd9a029162b32..18fc231cd2e005ccb43cef12d2f3863ed665337e:/servconf.c diff --git a/servconf.c b/servconf.c index a737f4b4..7923f5df 100644 --- a/servconf.c +++ b/servconf.c @@ -10,27 +10,6 @@ */ #include "includes.h" -RCSID("$OpenBSD: servconf.c,v 1.121 2003/05/15 14:02:47 jakob Exp $"); - -#if defined(KRB4) -#include -#endif - -#if defined(KRB5) -# ifdef HEIMDAL -# include -# else -/* - * XXX: Bodge - but then, so is using the kerberos IV KEYFILE to get a - * Kerberos V keytab - */ -# define KEYFILE "/etc/krb5.keytab" -# endif -#endif - -#ifdef AFS -#include -#endif #include "ssh.h" #include "log.h" @@ -38,7 +17,6 @@ RCSID("$OpenBSD: servconf.c,v 1.121 2003/05/15 14:02:47 jakob Exp $"); #include "xmalloc.h" #include "compat.h" #include "pathnames.h" -#include "tildexpand.h" #include "misc.h" #include "cipher.h" #include "kex.h" @@ -47,8 +25,6 @@ RCSID("$OpenBSD: servconf.c,v 1.121 2003/05/15 14:02:47 jakob Exp $"); static void add_listen_addr(ServerOptions *, char *, u_short); static void add_one_listen_addr(ServerOptions *, char *, u_short); -/* AF_UNSPEC or AF_INET or AF_INET6 */ -extern int IPv4or6; /* Use of privilege separation or not */ extern int use_privsep; @@ -66,6 +42,7 @@ initialize_server_options(ServerOptions *options) options->num_ports = 0; options->ports_from_cmdline = 0; options->listen_addrs = NULL; + options->address_family = -1; options->num_host_key_files = 0; options->pid_file = NULL; options->server_key_bits = -1; @@ -81,10 +58,9 @@ initialize_server_options(ServerOptions *options) options->x11_use_localhost = -1; options->xauth_location = NULL; options->strict_modes = -1; - options->keepalives = -1; + options->tcp_keep_alive = -1; options->log_facility = SYSLOG_FACILITY_NOT_SET; options->log_level = SYSLOG_LEVEL_NOT_SET; - options->rhosts_authentication = -1; options->rhosts_rsa_authentication = -1; options->hostbased_authentication = -1; options->hostbased_uses_name_from_packet_only = -1; @@ -93,8 +69,9 @@ initialize_server_options(ServerOptions *options) options->kerberos_authentication = -1; options->kerberos_or_local_passwd = -1; options->kerberos_ticket_cleanup = -1; - options->kerberos_tgt_passing = -1; - options->afs_token_passing = -1; + options->kerberos_get_afs_token = -1; + options->gss_authentication=-1; + options->gss_cleanup_creds = -1; options->password_authentication = -1; options->kbd_interactive_authentication = -1; options->challenge_response_authentication = -1; @@ -115,12 +92,15 @@ initialize_server_options(ServerOptions *options) options->max_startups_begin = -1; options->max_startups_rate = -1; options->max_startups = -1; + options->max_authtries = -1; options->banner = NULL; - options->verify_reverse_mapping = -1; + options->use_dns = -1; options->client_alive_interval = -1; options->client_alive_count_max = -1; options->authorized_keys_file = NULL; options->authorized_keys_file2 = NULL; + options->num_accept_env = 0; + options->permit_tun = -1; /* Needs to be accessable in many places */ use_privsep = -1; @@ -131,7 +111,7 @@ fill_default_server_options(ServerOptions *options) { /* Portable-specific options */ if (options->use_pam == -1) - options->use_pam = 1; + options->use_pam = 0; /* Standard Options */ if (options->protocol == SSH_PROTO_UNKNOWN) @@ -180,14 +160,12 @@ fill_default_server_options(ServerOptions *options) options->xauth_location = _PATH_XAUTH; if (options->strict_modes == -1) options->strict_modes = 1; - if (options->keepalives == -1) - options->keepalives = 1; + if (options->tcp_keep_alive == -1) + options->tcp_keep_alive = 1; if (options->log_facility == SYSLOG_FACILITY_NOT_SET) options->log_facility = SYSLOG_FACILITY_AUTH; if (options->log_level == SYSLOG_LEVEL_NOT_SET) options->log_level = SYSLOG_LEVEL_INFO; - if (options->rhosts_authentication == -1) - options->rhosts_authentication = 0; if (options->rhosts_rsa_authentication == -1) options->rhosts_rsa_authentication = 0; if (options->hostbased_authentication == -1) @@ -204,10 +182,12 @@ fill_default_server_options(ServerOptions *options) options->kerberos_or_local_passwd = 1; if (options->kerberos_ticket_cleanup == -1) options->kerberos_ticket_cleanup = 1; - if (options->kerberos_tgt_passing == -1) - options->kerberos_tgt_passing = 0; - if (options->afs_token_passing == -1) - options->afs_token_passing = 0; + if (options->kerberos_get_afs_token == -1) + options->kerberos_get_afs_token = 0; + if (options->gss_authentication == -1) + options->gss_authentication = 0; + if (options->gss_cleanup_creds == -1) + options->gss_cleanup_creds = 1; if (options->password_authentication == -1) options->password_authentication = 1; if (options->kbd_interactive_authentication == -1) @@ -221,7 +201,7 @@ fill_default_server_options(ServerOptions *options) if (options->use_login == -1) options->use_login = 0; if (options->compression == -1) - options->compression = 1; + options->compression = COMP_DELAYED; if (options->allow_tcp_forwarding == -1) options->allow_tcp_forwarding = 1; if (options->gateway_ports == -1) @@ -232,8 +212,10 @@ fill_default_server_options(ServerOptions *options) options->max_startups_rate = 100; /* 100% */ if (options->max_startups_begin == -1) options->max_startups_begin = options->max_startups; - if (options->verify_reverse_mapping == -1) - options->verify_reverse_mapping = 0; + if (options->max_authtries == -1) + options->max_authtries = DEFAULT_AUTH_FAIL_MAX; + if (options->use_dns == -1) + options->use_dns = 1; if (options->client_alive_interval == -1) options->client_alive_interval = 0; if (options->client_alive_count_max == -1) @@ -247,6 +229,8 @@ fill_default_server_options(ServerOptions *options) } if (options->authorized_keys_file == NULL) options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS; + if (options->permit_tun == -1) + options->permit_tun = SSH_TUNMODE_NO; /* Turn privilege separation on by default */ if (use_privsep == -1) @@ -271,20 +255,24 @@ typedef enum { /* Standard Options */ sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, sPermitRootLogin, sLogFacility, sLogLevel, - sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication, + sRhostsRSAAuthentication, sRSAAuthentication, sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, - sKerberosTgtPassing, sAFSTokenPassing, sChallengeResponseAuthentication, - sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, + sKerberosGetAFSToken, + sKerberosTgtPassing, sChallengeResponseAuthentication, + sPasswordAuthentication, sKbdInteractiveAuthentication, + sListenAddress, sAddressFamily, sPrintMotd, sPrintLastLog, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, - sStrictModes, sEmptyPasswd, sKeepAlives, + sStrictModes, sEmptyPasswd, sTCPKeepAlive, sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, - sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, - sBanner, sVerifyReverseMapping, sHostbasedAuthentication, + sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, + sMaxStartups, sMaxAuthTries, + sBanner, sUseDNS, sHostbasedAuthentication, sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2, + sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, sUsePrivilegeSeparation, sDeprecated, sUnsupported } ServerOpCodes; @@ -296,10 +284,11 @@ static struct { } keywords[] = { /* Portable-specific options */ #ifdef USE_PAM - { "UsePAM", sUsePAM }, + { "usepam", sUsePAM }, #else - { "UsePAM", sUnsupported }, + { "usepam", sUnsupported }, #endif + { "pamauthenticationviakbdint", sDeprecated }, /* Standard Options */ { "port", sPort }, { "hostkey", sHostKeyFile }, @@ -311,28 +300,36 @@ static struct { { "permitrootlogin", sPermitRootLogin }, { "syslogfacility", sLogFacility }, { "loglevel", sLogLevel }, - { "rhostsauthentication", sRhostsAuthentication }, + { "rhostsauthentication", sDeprecated }, { "rhostsrsaauthentication", sRhostsRSAAuthentication }, { "hostbasedauthentication", sHostbasedAuthentication }, { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, { "rsaauthentication", sRSAAuthentication }, { "pubkeyauthentication", sPubkeyAuthentication }, { "dsaauthentication", sPubkeyAuthentication }, /* alias */ -#if defined(KRB4) || defined(KRB5) +#ifdef KRB5 { "kerberosauthentication", sKerberosAuthentication }, { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, { "kerberosticketcleanup", sKerberosTicketCleanup }, - { "kerberostgtpassing", sKerberosTgtPassing }, +#ifdef USE_AFS + { "kerberosgetafstoken", sKerberosGetAFSToken }, +#else + { "kerberosgetafstoken", sUnsupported }, +#endif #else { "kerberosauthentication", sUnsupported }, { "kerberosorlocalpasswd", sUnsupported }, { "kerberosticketcleanup", sUnsupported }, - { "kerberostgtpassing", sUnsupported }, + { "kerberosgetafstoken", sUnsupported }, #endif -#if defined(AFS) - { "afstokenpassing", sAFSTokenPassing }, -#else + { "kerberostgtpassing", sUnsupported }, { "afstokenpassing", sUnsupported }, +#ifdef GSSAPI + { "gssapiauthentication", sGssAuthentication }, + { "gssapicleanupcredentials", sGssCleanupCreds }, +#else + { "gssapiauthentication", sUnsupported }, + { "gssapicleanupcredentials", sUnsupported }, #endif { "passwordauthentication", sPasswordAuthentication }, { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, @@ -340,6 +337,7 @@ static struct { { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ { "checkmail", sDeprecated }, { "listenaddress", sListenAddress }, + { "addressfamily", sAddressFamily }, { "printmotd", sPrintMotd }, { "printlastlog", sPrintLastLog }, { "ignorerhosts", sIgnoreRhosts }, @@ -353,7 +351,8 @@ static struct { { "permituserenvironment", sPermitUserEnvironment }, { "uselogin", sUseLogin }, { "compression", sCompression }, - { "keepalive", sKeepAlives }, + { "tcpkeepalive", sTCPKeepAlive }, + { "keepalive", sTCPKeepAlive }, /* obsolete alias */ { "allowtcpforwarding", sAllowTcpForwarding }, { "allowusers", sAllowUsers }, { "denyusers", sDenyUsers }, @@ -365,14 +364,18 @@ static struct { { "gatewayports", sGatewayPorts }, { "subsystem", sSubsystem }, { "maxstartups", sMaxStartups }, + { "maxauthtries", sMaxAuthTries }, { "banner", sBanner }, - { "verifyreversemapping", sVerifyReverseMapping }, - { "reversemappingcheck", sVerifyReverseMapping }, + { "usedns", sUseDNS }, + { "verifyreversemapping", sDeprecated }, + { "reversemappingcheck", sDeprecated }, { "clientaliveinterval", sClientAliveInterval }, { "clientalivecountmax", sClientAliveCountMax }, { "authorizedkeysfile", sAuthorizedKeysFile }, { "authorizedkeysfile2", sAuthorizedKeysFile2 }, { "useprivilegeseparation", sUsePrivilegeSeparation}, + { "acceptenv", sAcceptEnv }, + { "permittunnel", sPermitTunnel }, { NULL, sBadOption } }; @@ -398,10 +401,12 @@ parse_token(const char *cp, const char *filename, static void add_listen_addr(ServerOptions *options, char *addr, u_short port) { - int i; + u_int i; if (options->num_ports == 0) options->ports[options->num_ports++] = SSH_DEFAULT_PORT; + if (options->address_family == -1) + options->address_family = AF_UNSPEC; if (port == 0) for (i = 0; i < options->num_ports; i++) add_one_listen_addr(options, addr, options->ports[i]); @@ -417,7 +422,7 @@ add_one_listen_addr(ServerOptions *options, char *addr, u_short port) int gaierr; memset(&hints, 0, sizeof(hints)); - hints.ai_family = IPv4or6; + hints.ai_family = options->address_family; hints.ai_socktype = SOCK_STREAM; hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; snprintf(strport, sizeof strport, "%u", port); @@ -436,11 +441,14 @@ process_server_config_line(ServerOptions *options, char *line, const char *filename, int linenum) { char *cp, **charptr, *arg, *p; - int *intptr, value, i, n; + int *intptr, value, n; ServerOpCodes opcode; + u_short port; + u_int i; cp = line; - arg = strdelim(&cp); + if ((arg = strdelim(&cp)) != NULL) + return 0; /* Ignore leading whitespace */ if (*arg == '\0') arg = strdelim(&cp); @@ -510,39 +518,49 @@ parse_time: case sListenAddress: arg = strdelim(&cp); - if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) - fatal("%s line %d: missing inet addr.", + if (arg == NULL || *arg == '\0') + fatal("%s line %d: missing address", filename, linenum); - if (*arg == '[') { - if ((p = strchr(arg, ']')) == NULL) - fatal("%s line %d: bad ipv6 inet addr usage.", - filename, linenum); - arg++; - memmove(p, p+1, strlen(p+1)+1); - } else if (((p = strchr(arg, ':')) == NULL) || - (strchr(p+1, ':') != NULL)) { + /* check for bare IPv6 address: no "[]" and 2 or more ":" */ + if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL + && strchr(p+1, ':') != NULL) { add_listen_addr(options, arg, 0); break; } - if (*p == ':') { - u_short port; + p = hpdelim(&arg); + if (p == NULL) + fatal("%s line %d: bad address:port usage", + filename, linenum); + p = cleanhostname(p); + if (arg == NULL) + port = 0; + else if ((port = a2port(arg)) == 0) + fatal("%s line %d: bad port number", filename, linenum); - p++; - if (*p == '\0') - fatal("%s line %d: bad inet addr:port usage.", - filename, linenum); - else { - *(p-1) = '\0'; - if ((port = a2port(p)) == 0) - fatal("%s line %d: bad port number.", - filename, linenum); - add_listen_addr(options, arg, port); - } - } else if (*p == '\0') - add_listen_addr(options, arg, 0); - else - fatal("%s line %d: bad inet addr usage.", + add_listen_addr(options, p, port); + + break; + + case sAddressFamily: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing address family.", filename, linenum); + intptr = &options->address_family; + if (options->listen_addrs != NULL) + fatal("%s line %d: address family must be specified before " + "ListenAddress.", filename, linenum); + if (strcasecmp(arg, "inet") == 0) + value = AF_INET; + else if (strcasecmp(arg, "inet6") == 0) + value = AF_INET6; + else if (strcasecmp(arg, "any") == 0) + value = AF_UNSPEC; + else + fatal("%s line %d: unsupported address family \"%s\".", + filename, linenum, arg); + if (*intptr == -1) + *intptr = value; break; case sHostKeyFile: @@ -615,10 +633,6 @@ parse_flag: intptr = &options->ignore_user_known_hosts; goto parse_flag; - case sRhostsAuthentication: - intptr = &options->rhosts_authentication; - goto parse_flag; - case sRhostsRSAAuthentication: intptr = &options->rhosts_rsa_authentication; goto parse_flag; @@ -651,12 +665,16 @@ parse_flag: intptr = &options->kerberos_ticket_cleanup; goto parse_flag; - case sKerberosTgtPassing: - intptr = &options->kerberos_tgt_passing; + case sKerberosGetAFSToken: + intptr = &options->kerberos_get_afs_token; goto parse_flag; - case sAFSTokenPassing: - intptr = &options->afs_token_passing; + case sGssAuthentication: + intptr = &options->gss_authentication; + goto parse_flag; + + case sGssCleanupCreds: + intptr = &options->gss_cleanup_creds; goto parse_flag; case sPasswordAuthentication: @@ -699,8 +717,8 @@ parse_flag: intptr = &options->strict_modes; goto parse_flag; - case sKeepAlives: - intptr = &options->keepalives; + case sTCPKeepAlive: + intptr = &options->tcp_keep_alive; goto parse_flag; case sEmptyPasswd: @@ -717,14 +735,46 @@ parse_flag: case sCompression: intptr = &options->compression; - goto parse_flag; + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing yes/no/delayed " + "argument.", filename, linenum); + value = 0; /* silence compiler */ + if (strcmp(arg, "delayed") == 0) + value = COMP_DELAYED; + else if (strcmp(arg, "yes") == 0) + value = COMP_ZLIB; + else if (strcmp(arg, "no") == 0) + value = COMP_NONE; + else + fatal("%s line %d: Bad yes/no/delayed " + "argument: %s", filename, linenum, arg); + if (*intptr == -1) + *intptr = value; + break; case sGatewayPorts: intptr = &options->gateway_ports; - goto parse_flag; + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing yes/no/clientspecified " + "argument.", filename, linenum); + value = 0; /* silence compiler */ + if (strcmp(arg, "clientspecified") == 0) + value = 2; + else if (strcmp(arg, "yes") == 0) + value = 1; + else if (strcmp(arg, "no") == 0) + value = 0; + else + fatal("%s line %d: Bad yes/no/clientspecified " + "argument: %s", filename, linenum, arg); + if (*intptr == -1) + *intptr = value; + break; - case sVerifyReverseMapping: - intptr = &options->verify_reverse_mapping; + case sUseDNS: + intptr = &options->use_dns; goto parse_flag; case sLogFacility: @@ -875,6 +925,10 @@ parse_flag: options->max_startups = options->max_startups_begin; break; + case sMaxAuthTries: + intptr = &options->max_authtries; + goto parse_int; + case sBanner: charptr = &options->banner; goto parse_filename; @@ -899,6 +953,41 @@ parse_flag: intptr = &options->client_alive_count_max; goto parse_int; + case sAcceptEnv: + while ((arg = strdelim(&cp)) && *arg != '\0') { + if (strchr(arg, '=') != NULL) + fatal("%s line %d: Invalid environment name.", + filename, linenum); + if (options->num_accept_env >= MAX_ACCEPT_ENV) + fatal("%s line %d: too many allow env.", + filename, linenum); + options->accept_env[options->num_accept_env++] = + xstrdup(arg); + } + break; + + case sPermitTunnel: + intptr = &options->permit_tun; + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: Missing yes/point-to-point/" + "ethernet/no argument.", filename, linenum); + value = 0; /* silence compiler */ + if (strcasecmp(arg, "ethernet") == 0) + value = SSH_TUNMODE_ETHERNET; + else if (strcasecmp(arg, "point-to-point") == 0) + value = SSH_TUNMODE_POINTOPOINT; + else if (strcasecmp(arg, "yes") == 0) + value = SSH_TUNMODE_YES; + else if (strcasecmp(arg, "no") == 0) + value = SSH_TUNMODE_NO; + else + fatal("%s line %d: Bad yes/point-to-point/ethernet/" + "no argument: %s", filename, linenum, arg); + if (*intptr == -1) + *intptr = value; + break; + case sDeprecated: logit("%s line %d: Deprecated option %s", filename, linenum, arg); @@ -926,26 +1015,50 @@ parse_flag: /* Reads the server configuration file. */ void -read_server_config(ServerOptions *options, const char *filename) +load_server_config(const char *filename, Buffer *conf) { - int linenum, bad_options = 0; - char line[1024]; + char line[1024], *cp; FILE *f; - debug2("read_server_config: filename %s", filename); - f = fopen(filename, "r"); - if (!f) { + debug2("%s: filename %s", __func__, filename); + if ((f = fopen(filename, "r")) == NULL) { perror(filename); exit(1); } - linenum = 0; + buffer_clear(conf); while (fgets(line, sizeof(line), f)) { - /* Update line number counter. */ - linenum++; - if (process_server_config_line(options, line, filename, linenum) != 0) - bad_options++; + /* + * Trim out comments and strip whitespace + * NB - preserve newlines, they are needed to reproduce + * line numbers later for error messages + */ + if ((cp = strchr(line, '#')) != NULL) + memcpy(cp, "\n", 2); + cp = line + strspn(line, " \t\r"); + + buffer_append(conf, cp, strlen(cp)); } + buffer_append(conf, "\0", 1); fclose(f); + debug2("%s: done config len = %d", __func__, buffer_len(conf)); +} + +void +parse_server_config(ServerOptions *options, const char *filename, Buffer *conf) +{ + int linenum, bad_options = 0; + char *cp, *obuf, *cbuf; + + debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); + + obuf = cbuf = xstrdup(buffer_ptr(conf)); + linenum = 1; + while ((cp = strsep(&cbuf, "\n")) != NULL) { + if (process_server_config_line(options, cp, filename, + linenum++) != 0) + bad_options++; + } + xfree(obuf); if (bad_options > 0) fatal("%s: terminating, %d bad configuration options", filename, bad_options);