/*
- *
- * servconf.c
- *
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- *
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
*
- * Created: Mon Aug 21 15:48:58 1995 ylo
- *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
*/
#include "includes.h"
-RCSID("$OpenBSD: servconf.c,v 1.49 2000/07/14 22:59:46 markus Exp $");
+RCSID("$OpenBSD: servconf.c,v 1.71 2001/03/05 15:44:51 stevesk Exp $");
+
+#ifdef KRB4
+#include <krb.h>
+#endif
+#ifdef AFS
+#include <kafs.h>
+#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
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;
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;
options->afs_token_passing = -1;
#endif
options->password_authentication = -1;
-#ifdef SKEY
- options->skey_authentication = -1;
-#endif
+ options->kbd_interactive_authentication = -1;
+ options->challenge_reponse_authentication = -1;
options->permit_empty_passwd = -1;
options->use_login = -1;
+ options->allow_tcp_forwarding = -1;
options->num_allow_users = 0;
options->num_deny_users = 0;
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)
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);
#endif /* AFS */
if (options->password_authentication == -1)
options->password_authentication = 1;
-#ifdef SKEY
- if (options->skey_authentication == -1)
- options->skey_authentication = 1;
-#endif
+ if (options->kbd_interactive_authentication == -1)
+ options->kbd_interactive_authentication = 0;
+ 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->protocol == SSH_PROTO_UNKNOWN)
- options->protocol = SSH_PROTO_1|SSH_PROTO_2;
+ if (options->allow_tcp_forwarding == -1)
+ options->allow_tcp_forwarding = 1;
if (options->gateway_ports == -1)
options->gateway_ports = 0;
if (options->max_startups == -1)
options->max_startups = 10;
+ if (options->max_startups_rate == -1)
+ 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. */
#ifdef AFS
sKerberosTgtPassing, sAFSTokenPassing,
#endif
-#ifdef SKEY
- sSkeyAuthentication,
-#endif
- sPasswordAuthentication, sListenAddress,
+ sChallengeResponseAuthentication,
+ sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset,
- sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail,
- sUseLogin, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
- sIgnoreUserKnownHosts, sHostDSAKeyFile, sCiphers, sProtocol, sPidFile,
- sGatewayPorts, sDSAAuthentication, sXAuthLocation, sSubsystem, sMaxStartups
+ sStrictModes, sEmptyPasswd, sKeepAlives, sCheckMail,
+ sUseLogin, sAllowTcpForwarding,
+ sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
+ sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
+ sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
+ sBanner, sReverseMappingCheck
} ServerOpCodes;
/* Textual representation of the tokens. */
} keywords[] = {
{ "port", sPort },
{ "hostkey", sHostKeyFile },
- { "hostdsakey", sHostDSAKeyFile },
- { "pidfile", sPidFile },
+ { "hostdsakey", sHostKeyFile }, /* alias */
+ { "pidfile", sPidFile },
{ "serverkeybits", sServerKeyBits },
{ "logingracetime", sLoginGraceTime },
{ "keyregenerationinterval", sKeyRegenerationTime },
{ "rhostsauthentication", sRhostsAuthentication },
{ "rhostsrsaauthentication", sRhostsRSAAuthentication },
{ "rsaauthentication", sRSAAuthentication },
- { "dsaauthentication", sDSAAuthentication },
+ { "pubkeyauthentication", sPubkeyAuthentication },
+ { "dsaauthentication", sPubkeyAuthentication }, /* alias */
#ifdef KRB4
{ "kerberosauthentication", sKerberosAuthentication },
{ "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
{ "afstokenpassing", sAFSTokenPassing },
#endif
{ "passwordauthentication", sPasswordAuthentication },
-#ifdef SKEY
- { "skeyauthentication", sSkeyAuthentication },
-#endif
+ { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
+ { "challengeresponseauthentication", sChallengeResponseAuthentication },
+ { "skeyauthentication", sChallengeResponseAuthentication }, /* alias */
{ "checkmail", sCheckMail },
{ "listenaddress", sListenAddress },
{ "printmotd", sPrintMotd },
{ "strictmodes", sStrictModes },
{ "permitemptypasswords", sEmptyPasswd },
{ "uselogin", sUseLogin },
- { "randomseed", sRandomSeedFile },
{ "keepalive", sKeepAlives },
+ { "allowtcpforwarding", sAllowTcpForwarding },
{ "allowusers", sAllowUsers },
{ "denyusers", sDenyUsers },
{ "allowgroups", sAllowGroups },
{ "denygroups", sDenyGroups },
{ "ciphers", sCiphers },
+ { "macs", sMacs },
{ "protocol", sProtocol },
{ "gatewayports", sGatewayPorts },
{ "subsystem", sSubsystem },
{ "maxstartups", sMaxStartups },
+ { "banner", sBanner },
+ { "reversemappingcheck", sReverseMappingCheck },
{ NULL, 0 }
};
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)
void
add_listen_addr(ServerOptions *options, char *addr)
{
- extern int IPv4or6;
struct addrinfo hints, *ai, *aitop;
char strport[NI_MAXSERV];
int gaierr;
hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
snprintf(strport, sizeof strport, "%d", options->ports[i]);
if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
- fatal("bad addr or host: %s (%s)\n",
+ fatal("bad addr or host: %s (%s)",
addr ? addr : "<NULL>",
gai_strerror(gaierr));
for (ai = aitop; ai->ai_next; ai = ai->ai_next)
/* 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:
fatal("%s line %d: ports must be specified before "
"ListenAdress.\n", filename, linenum);
if (options->num_ports >= MAX_PORTS)
- fatal("%s line %d: too many ports.\n",
+ fatal("%s line %d: too many ports.",
filename, linenum);
arg = strdelim(&cp);
if (!arg || *arg == '\0')
- fatal("%s line %d: missing port number.\n",
+ fatal("%s line %d: missing port number.",
filename, linenum);
options->ports[options->num_ports++] = atoi(arg);
break;
case sListenAddress:
arg = strdelim(&cp);
if (!arg || *arg == '\0')
- fatal("%s line %d: missing inet addr.\n",
+ fatal("%s line %d: missing inet addr.",
filename, linenum);
add_listen_addr(options, arg);
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: too 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') {
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:
charptr = &options->pid_file;
goto parse_filename;
- case sRandomSeedFile:
- fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n",
- filename, linenum);
- arg = strdelim(&cp);
- break;
-
case sPermitRootLogin:
intptr = &options->permit_root_login;
arg = strdelim(&cp);
if (!arg || *arg == '\0') {
- fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n",
- filename, linenum);
+ fprintf(stderr, "%s line %d: missing yes/"
+ "without-password/forced-commands-only/no "
+ "argument.\n", filename, linenum);
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)
intptr = &options->rsa_authentication;
goto parse_flag;
- case sDSAAuthentication:
- intptr = &options->dsa_authentication;
+ case sPubkeyAuthentication:
+ intptr = &options->pubkey_authentication;
goto parse_flag;
#ifdef KRB4
intptr = &options->password_authentication;
goto parse_flag;
+ case sKbdInteractiveAuthentication:
+ intptr = &options->kbd_interactive_authentication;
+ goto parse_flag;
+
case sCheckMail:
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;
case sXAuthLocation:
charptr = &options->xauth_location;
goto parse_filename;
-
+
case sStrictModes:
intptr = &options->strict_modes;
goto parse_flag;
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);
value = log_facility_number(arg);
if (value == (SyslogFacility) - 1)
- fatal("%.200s line %d: unsupported log facility '%s'\n",
+ fatal("%.200s line %d: unsupported log facility '%s'",
filename, linenum, arg ? arg : "<NONE>");
if (*intptr == -1)
*intptr = (SyslogFacility) value;
arg = strdelim(&cp);
value = log_level_number(arg);
if (value == (LogLevel) - 1)
- fatal("%.200s line %d: unsupported log level '%s'\n",
+ fatal("%.200s line %d: unsupported log level '%s'",
filename, linenum, arg ? arg : "<NONE>");
if (*intptr == -1)
*intptr = (LogLevel) value;
break;
+ case sAllowTcpForwarding:
+ intptr = &options->allow_tcp_forwarding;
+ goto parse_flag;
+
case sAllowUsers:
while ((arg = strdelim(&cp)) && *arg != '\0') {
if (options->num_allow_users >= MAX_ALLOW_USERS)
- fatal("%s line %d: too many allow users.\n",
+ fatal("%s line %d: too many allow users.",
filename, linenum);
options->allow_users[options->num_allow_users++] = xstrdup(arg);
}
case sDenyUsers:
while ((arg = strdelim(&cp)) && *arg != '\0') {
if (options->num_deny_users >= MAX_DENY_USERS)
- fatal( "%s line %d: too many deny users.\n",
+ fatal( "%s line %d: too many deny users.",
filename, linenum);
options->deny_users[options->num_deny_users++] = xstrdup(arg);
}
case sAllowGroups:
while ((arg = strdelim(&cp)) && *arg != '\0') {
if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
- fatal("%s line %d: too many allow groups.\n",
+ fatal("%s line %d: too many allow groups.",
filename, linenum);
options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
}
case sDenyGroups:
while ((arg = strdelim(&cp)) && *arg != '\0') {
if (options->num_deny_groups >= MAX_DENY_GROUPS)
- fatal("%s line %d: too many deny groups.\n",
+ fatal("%s line %d: too many deny groups.",
filename, linenum);
options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
}
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 : "<NONE>");
+ if (options->macs == NULL)
+ options->macs = xstrdup(arg);
+ break;
+
case sProtocol:
intptr = &options->protocol;
arg = strdelim(&cp);
break;
case sMaxStartups:
+ arg = strdelim(&cp);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: Missing MaxStartups spec.",
+ filename, linenum);
+ if (sscanf(arg, "%d:%d:%d",
+ &options->max_startups_begin,
+ &options->max_startups_rate,
+ &options->max_startups) == 3) {
+ if (options->max_startups_begin >
+ options->max_startups ||
+ options->max_startups_rate > 100 ||
+ options->max_startups_rate < 1)
+ fatal("%s line %d: Illegal MaxStartups spec.",
+ filename, linenum);
+ break;
+ }
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);
andersk / openssh.git / blobdiff