=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/servconf.c,v retrieving revision 1.40.2.3 retrieving revision 1.40.2.4 diff -u -r1.40.2.3 -r1.40.2.4 --- src/usr.bin/ssh/servconf.c 2000/11/08 21:31:12 1.40.2.3 +++ src/usr.bin/ssh/servconf.c 2001/03/12 15:44:14 1.40.2.4 @@ -10,16 +10,33 @@ */ #include "includes.h" -RCSID("$OpenBSD: servconf.c,v 1.40.2.3 2000/11/08 21:31:12 jason Exp $"); +RCSID("$OpenBSD: servconf.c,v 1.40.2.4 2001/03/12 15:44:14 jason Exp $"); +#ifdef KRB4 +#include +#endif +#ifdef AFS +#include +#endif + #include "ssh.h" +#include "log.h" #include "servconf.h" #include "xmalloc.h" #include "compat.h" +#include "pathnames.h" +#include "tildexpand.h" +#include "misc.h" +#include "cipher.h" +#include "kex.h" +#include "mac.h" /* add listen address */ void add_listen_addr(ServerOptions *options, char *addr); +/* AF_UNSPEC or AF_INET or AF_INET6 */ +extern int IPv4or6; + /* Initializes the server options to their default values. */ void @@ -29,13 +46,12 @@ options->num_ports = 0; options->ports_from_cmdline = 0; options->listen_addrs = NULL; - options->host_key_file = NULL; - options->host_dsa_key_file = NULL; + options->num_host_key_files = 0; options->pid_file = NULL; options->server_key_bits = -1; options->login_grace_time = -1; options->key_regeneration_time = -1; - options->permit_root_login = -1; + options->permit_root_login = PERMIT_NOT_SET; options->ignore_rhosts = -1; options->ignore_user_known_hosts = -1; options->print_motd = -1; @@ -50,7 +66,7 @@ options->rhosts_authentication = -1; options->rhosts_rsa_authentication = -1; options->rsa_authentication = -1; - options->dsa_authentication = -1; + options->pubkey_authentication = -1; #ifdef KRB4 options->kerberos_authentication = -1; options->kerberos_or_local_passwd = -1; @@ -62,9 +78,7 @@ #endif options->password_authentication = -1; options->kbd_interactive_authentication = -1; -#ifdef SKEY - options->skey_authentication = -1; -#endif + options->challenge_reponse_authentication = -1; options->permit_empty_passwd = -1; options->use_login = -1; options->allow_tcp_forwarding = -1; @@ -73,35 +87,43 @@ options->num_allow_groups = 0; options->num_deny_groups = 0; options->ciphers = NULL; + options->macs = NULL; options->protocol = SSH_PROTO_UNKNOWN; options->gateway_ports = -1; options->num_subsystems = 0; options->max_startups_begin = -1; options->max_startups_rate = -1; options->max_startups = -1; + options->banner = NULL; + options->reverse_mapping_check = -1; } void fill_default_server_options(ServerOptions *options) { + if (options->protocol == SSH_PROTO_UNKNOWN) + options->protocol = SSH_PROTO_1|SSH_PROTO_2; + if (options->num_host_key_files == 0) { + /* fill default hostkeys for protocols */ + if (options->protocol & SSH_PROTO_1) + options->host_key_files[options->num_host_key_files++] = _PATH_HOST_KEY_FILE; + if (options->protocol & SSH_PROTO_2) + options->host_key_files[options->num_host_key_files++] = _PATH_HOST_DSA_KEY_FILE; + } if (options->num_ports == 0) options->ports[options->num_ports++] = SSH_DEFAULT_PORT; if (options->listen_addrs == NULL) add_listen_addr(options, NULL); - if (options->host_key_file == NULL) - options->host_key_file = HOST_KEY_FILE; - if (options->host_dsa_key_file == NULL) - options->host_dsa_key_file = HOST_DSA_KEY_FILE; if (options->pid_file == NULL) - options->pid_file = SSH_DAEMON_PID_FILE; + options->pid_file = _PATH_SSH_DAEMON_PID_FILE; if (options->server_key_bits == -1) options->server_key_bits = 768; if (options->login_grace_time == -1) options->login_grace_time = 600; if (options->key_regeneration_time == -1) options->key_regeneration_time = 3600; - if (options->permit_root_login == -1) - options->permit_root_login = 1; /* yes */ + if (options->permit_root_login == PERMIT_NOT_SET) + options->permit_root_login = PERMIT_YES; if (options->ignore_rhosts == -1) options->ignore_rhosts = 1; if (options->ignore_user_known_hosts == -1) @@ -132,8 +154,8 @@ options->rhosts_rsa_authentication = 0; if (options->rsa_authentication == -1) options->rsa_authentication = 1; - if (options->dsa_authentication == -1) - options->dsa_authentication = 1; + if (options->pubkey_authentication == -1) + options->pubkey_authentication = 1; #ifdef KRB4 if (options->kerberos_authentication == -1) options->kerberos_authentication = (access(KEYFILE, R_OK) == 0); @@ -152,18 +174,14 @@ options->password_authentication = 1; if (options->kbd_interactive_authentication == -1) options->kbd_interactive_authentication = 0; -#ifdef SKEY - if (options->skey_authentication == -1) - options->skey_authentication = 1; -#endif + if (options->challenge_reponse_authentication == -1) + options->challenge_reponse_authentication = 1; if (options->permit_empty_passwd == -1) options->permit_empty_passwd = 0; if (options->use_login == -1) options->use_login = 0; if (options->allow_tcp_forwarding == -1) options->allow_tcp_forwarding = 1; - if (options->protocol == SSH_PROTO_UNKNOWN) - options->protocol = SSH_PROTO_1|SSH_PROTO_2; if (options->gateway_ports == -1) options->gateway_ports = 0; if (options->max_startups == -1) @@ -172,6 +190,8 @@ options->max_startups_rate = 100; /* 100% */ if (options->max_startups_begin == -1) options->max_startups_begin = options->max_startups; + if (options->reverse_mapping_check == -1) + options->reverse_mapping_check = 0; } /* Keyword tokens. */ @@ -186,16 +206,15 @@ #ifdef AFS sKerberosTgtPassing, sAFSTokenPassing, #endif -#ifdef SKEY - sSkeyAuthentication, -#endif + sChallengeResponseAuthentication, sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail, sUseLogin, sAllowTcpForwarding, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, - sIgnoreUserKnownHosts, sHostDSAKeyFile, sCiphers, sProtocol, sPidFile, - sGatewayPorts, sDSAAuthentication, sXAuthLocation, sSubsystem, sMaxStartups + sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, + sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, + sBanner, sReverseMappingCheck } ServerOpCodes; /* Textual representation of the tokens. */ @@ -205,8 +224,8 @@ } keywords[] = { { "port", sPort }, { "hostkey", sHostKeyFile }, - { "hostdsakey", sHostDSAKeyFile }, - { "pidfile", sPidFile }, + { "hostdsakey", sHostKeyFile }, /* alias */ + { "pidfile", sPidFile }, { "serverkeybits", sServerKeyBits }, { "logingracetime", sLoginGraceTime }, { "keyregenerationinterval", sKeyRegenerationTime }, @@ -216,7 +235,8 @@ { "rhostsauthentication", sRhostsAuthentication }, { "rhostsrsaauthentication", sRhostsRSAAuthentication }, { "rsaauthentication", sRSAAuthentication }, - { "dsaauthentication", sDSAAuthentication }, + { "pubkeyauthentication", sPubkeyAuthentication }, + { "dsaauthentication", sPubkeyAuthentication }, /* alias */ #ifdef KRB4 { "kerberosauthentication", sKerberosAuthentication }, { "kerberosorlocalpasswd", sKerberosOrLocalPasswd }, @@ -228,9 +248,8 @@ #endif { "passwordauthentication", sPasswordAuthentication }, { "kbdinteractiveauthentication", sKbdInteractiveAuthentication }, -#ifdef SKEY - { "skeyauthentication", sSkeyAuthentication }, -#endif + { "challengeresponseauthentication", sChallengeResponseAuthentication }, + { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */ { "checkmail", sCheckMail }, { "listenaddress", sListenAddress }, { "printmotd", sPrintMotd }, @@ -250,10 +269,13 @@ { "allowgroups", sAllowGroups }, { "denygroups", sDenyGroups }, { "ciphers", sCiphers }, + { "macs", sMacs }, { "protocol", sProtocol }, { "gatewayports", sGatewayPorts }, { "subsystem", sSubsystem }, { "maxstartups", sMaxStartups }, + { "banner", sBanner }, + { "reversemappingcheck", sReverseMappingCheck }, { NULL, 0 } }; @@ -266,7 +288,7 @@ parse_token(const char *cp, const char *filename, int linenum) { - unsigned int i; + u_int i; for (i = 0; keywords[i].name; i++) if (strcasecmp(cp, keywords[i].name) == 0) @@ -283,7 +305,6 @@ void add_listen_addr(ServerOptions *options, char *addr) { - extern int IPv4or6; struct addrinfo hints, *ai, *aitop; char strport[NI_MAXSERV]; int gaierr; @@ -334,8 +355,10 @@ /* Ignore leading whitespace */ if (*arg == '\0') arg = strdelim(&cp); - if (!*arg || *arg == '#') + if (!arg || !*arg || *arg == '#') continue; + intptr = NULL; + charptr = NULL; opcode = parse_token(arg, filename, linenum); switch (opcode) { case sBadOption: @@ -389,9 +412,13 @@ break; case sHostKeyFile: - case sHostDSAKeyFile: - charptr = (opcode == sHostKeyFile ) ? - &options->host_key_file : &options->host_dsa_key_file; + intptr = &options->num_host_key_files; + if (*intptr >= MAX_HOSTKEYS) { + fprintf(stderr, "%s line %d: to many host keys specified (max %d).\n", + filename, linenum, MAX_HOSTKEYS); + exit(1); + } + charptr = &options->host_key_files[*intptr]; parse_filename: arg = strdelim(&cp); if (!arg || *arg == '\0') { @@ -399,8 +426,12 @@ filename, linenum); exit(1); } - if (*charptr == NULL) + if (*charptr == NULL) { *charptr = tilde_expand_filename(arg, getuid()); + /* increase optional counter */ + if (intptr != NULL) + *intptr = *intptr + 1; + } break; case sPidFile: @@ -422,14 +453,17 @@ exit(1); } if (strcmp(arg, "without-password") == 0) - value = 2; + value = PERMIT_NO_PASSWD; + else if (strcmp(arg, "forced-commands-only") == 0) + value = PERMIT_FORCED_ONLY; else if (strcmp(arg, "yes") == 0) - value = 1; + value = PERMIT_YES; else if (strcmp(arg, "no") == 0) - value = 0; + value = PERMIT_NO; else { - fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n", - filename, linenum, arg); + fprintf(stderr, "%s line %d: Bad yes/" + "without-password/forced-commands-only/no " + "argument: %s\n", filename, linenum, arg); exit(1); } if (*intptr == -1) @@ -474,8 +508,8 @@ intptr = &options->rsa_authentication; goto parse_flag; - case sDSAAuthentication: - intptr = &options->dsa_authentication; + case sPubkeyAuthentication: + intptr = &options->pubkey_authentication; goto parse_flag; #ifdef KRB4 @@ -514,11 +548,9 @@ intptr = &options->check_mail; goto parse_flag; -#ifdef SKEY - case sSkeyAuthentication: - intptr = &options->skey_authentication; + case sChallengeResponseAuthentication: + intptr = &options->challenge_reponse_authentication; goto parse_flag; -#endif case sPrintMotd: intptr = &options->print_motd; @@ -535,7 +567,7 @@ case sXAuthLocation: charptr = &options->xauth_location; goto parse_filename; - + case sStrictModes: intptr = &options->strict_modes; goto parse_flag; @@ -556,6 +588,10 @@ intptr = &options->gateway_ports; goto parse_flag; + case sReverseMappingCheck: + intptr = &options->reverse_mapping_check; + goto parse_flag; + case sLogFacility: intptr = (int *) &options->log_facility; arg = strdelim(&cp); @@ -629,6 +665,17 @@ options->ciphers = xstrdup(arg); break; + case sMacs: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: Missing argument.", filename, linenum); + if (!mac_valid(arg)) + fatal("%s line %d: Bad SSH2 mac spec '%s'.", + filename, linenum, arg ? arg : ""); + if (options->macs == NULL) + options->macs = xstrdup(arg); + break; + case sProtocol: intptr = &options->protocol; arg = strdelim(&cp); @@ -684,13 +731,17 @@ intptr = &options->max_startups; goto parse_int; + case sBanner: + charptr = &options->banner; + goto parse_filename; + default: fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n", filename, linenum, arg, opcode); exit(1); } if ((arg = strdelim(&cp)) != NULL && *arg != '\0') { - fprintf(stderr, + fprintf(stderr, "%s line %d: garbage at end of line; \"%.200s\".\n", filename, linenum, arg); exit(1);