/*
- *
+ *
* 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
- *
+ *
*/
#include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: servconf.c,v 1.47 2000/07/10 16:30:25 ho Exp $");
#include "ssh.h"
#include "servconf.h"
#include "xmalloc.h"
+#include "compat.h"
+
+/* add listen address */
+void add_listen_addr(ServerOptions *options, char *addr);
/* Initializes the server options to their default values. */
-void
+void
initialize_server_options(ServerOptions *options)
{
memset(options, 0, sizeof(*options));
- options->port = -1;
- options->listen_addr.s_addr = htonl(INADDR_ANY);
+ 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->pid_file = NULL;
options->server_key_bits = -1;
options->login_grace_time = -1;
options->key_regeneration_time = -1;
options->check_mail = -1;
options->x11_forwarding = -1;
options->x11_display_offset = -1;
+ options->xauth_location = NULL;
options->strict_modes = -1;
options->keepalives = -1;
options->log_facility = (SyslogFacility) - 1;
options->rhosts_authentication = -1;
options->rhosts_rsa_authentication = -1;
options->rsa_authentication = -1;
+ options->dsa_authentication = -1;
#ifdef KRB4
options->kerberos_authentication = -1;
options->kerberos_or_local_passwd = -1;
options->num_deny_users = 0;
options->num_allow_groups = 0;
options->num_deny_groups = 0;
+ options->ciphers = NULL;
+ options->protocol = SSH_PROTO_UNKNOWN;
+ options->gateway_ports = -1;
+ options->num_subsystems = 0;
+ options->max_startups = -1;
}
-void
+void
fill_default_server_options(ServerOptions *options)
{
- if (options->port == -1) {
- struct servent *sp;
-
- sp = getservbyname(SSH_SERVICE_NAME, "tcp");
- if (sp)
- options->port = ntohs(sp->s_port);
- else
- options->port = SSH_DEFAULT_PORT;
- endservent();
- }
+ 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;
if (options->server_key_bits == -1)
options->server_key_bits = 768;
if (options->login_grace_time == -1)
if (options->permit_root_login == -1)
options->permit_root_login = 1; /* yes */
if (options->ignore_rhosts == -1)
- options->ignore_rhosts = 0;
+ options->ignore_rhosts = 1;
if (options->ignore_user_known_hosts == -1)
options->ignore_user_known_hosts = 0;
if (options->check_mail == -1)
if (options->print_motd == -1)
options->print_motd = 1;
if (options->x11_forwarding == -1)
- options->x11_forwarding = 1;
+ options->x11_forwarding = 0;
if (options->x11_display_offset == -1)
- options->x11_display_offset = 1;
+ options->x11_display_offset = 10;
+#ifdef XAUTH_PATH
+ if (options->xauth_location == NULL)
+ options->xauth_location = XAUTH_PATH;
+#endif /* XAUTH_PATH */
if (options->strict_modes == -1)
options->strict_modes = 1;
if (options->keepalives == -1)
if (options->rhosts_authentication == -1)
options->rhosts_authentication = 0;
if (options->rhosts_rsa_authentication == -1)
- options->rhosts_rsa_authentication = 1;
+ options->rhosts_rsa_authentication = 0;
if (options->rsa_authentication == -1)
options->rsa_authentication = 1;
+ if (options->dsa_authentication == -1)
+ options->dsa_authentication = 1;
#ifdef KRB4
if (options->kerberos_authentication == -1)
options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
options->skey_authentication = 1;
#endif
if (options->permit_empty_passwd == -1)
- 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->gateway_ports == -1)
+ options->gateway_ports = 0;
+ if (options->max_startups == -1)
+ options->max_startups = 10;
}
-#define WHITESPACE " \t\r\n"
+#define WHITESPACE " \t\r\n="
/* Keyword tokens. */
typedef enum {
sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset,
sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail,
sUseLogin, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
- sIgnoreUserKnownHosts
+ sIgnoreUserKnownHosts, sHostDSAKeyFile, sCiphers, sProtocol, sPidFile,
+ sGatewayPorts, sDSAAuthentication, sXAuthLocation, sSubsystem, sMaxStartups
} ServerOpCodes;
/* Textual representation of the tokens. */
} keywords[] = {
{ "port", sPort },
{ "hostkey", sHostKeyFile },
+ { "hostdsakey", sHostDSAKeyFile },
+ { "pidfile", sPidFile },
{ "serverkeybits", sServerKeyBits },
{ "logingracetime", sLoginGraceTime },
{ "keyregenerationinterval", sKeyRegenerationTime },
{ "rhostsauthentication", sRhostsAuthentication },
{ "rhostsrsaauthentication", sRhostsRSAAuthentication },
{ "rsaauthentication", sRSAAuthentication },
+ { "dsaauthentication", sDSAAuthentication },
#ifdef KRB4
{ "kerberosauthentication", sKerberosAuthentication },
{ "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
{ "ignoreuserknownhosts", sIgnoreUserKnownHosts },
{ "x11forwarding", sX11Forwarding },
{ "x11displayoffset", sX11DisplayOffset },
+ { "xauthlocation", sXAuthLocation },
{ "strictmodes", sStrictModes },
{ "permitemptypasswords", sEmptyPasswd },
{ "uselogin", sUseLogin },
{ "denyusers", sDenyUsers },
{ "allowgroups", sAllowGroups },
{ "denygroups", sDenyGroups },
+ { "ciphers", sCiphers },
+ { "protocol", sProtocol },
+ { "gatewayports", sGatewayPorts },
+ { "subsystem", sSubsystem },
+ { "maxstartups", sMaxStartups },
{ NULL, 0 }
};
-/* Returns the number of the token pointed to by cp of length len.
- Never returns if the token is not known. */
+/*
+ * Returns the number of the token pointed to by cp of length len. Never
+ * returns if the token is not known.
+ */
-static ServerOpCodes
+static ServerOpCodes
parse_token(const char *cp, const char *filename,
int linenum)
{
unsigned int i;
for (i = 0; keywords[i].name; i++)
- if (strcmp(cp, keywords[i].name) == 0)
+ if (strcasecmp(cp, keywords[i].name) == 0)
return keywords[i].opcode;
fprintf(stderr, "%s: line %d: Bad configuration option: %s\n",
return sBadOption;
}
+/*
+ * add listen address
+ */
+void
+add_listen_addr(ServerOptions *options, char *addr)
+{
+ extern int IPv4or6;
+ struct addrinfo hints, *ai, *aitop;
+ char strport[NI_MAXSERV];
+ int gaierr;
+ int i;
+
+ if (options->num_ports == 0)
+ options->ports[options->num_ports++] = SSH_DEFAULT_PORT;
+ for (i = 0; i < options->num_ports; i++) {
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = IPv4or6;
+ hints.ai_socktype = SOCK_STREAM;
+ 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",
+ addr ? addr : "<NULL>",
+ gai_strerror(gaierr));
+ for (ai = aitop; ai->ai_next; ai = ai->ai_next)
+ ;
+ ai->ai_next = options->listen_addrs;
+ options->listen_addrs = aitop;
+ }
+}
+
/* Reads the server configuration file. */
-void
+void
read_server_config(ServerOptions *options, const char *filename)
{
FILE *f;
char line[1024];
- char *cp, **charptr;
+ char *cp, **charptr, *arg;
int linenum, *intptr, value;
int bad_options = 0;
ServerOpCodes opcode;
+ int i;
f = fopen(filename, "r");
if (!f) {
cp = line + strspn(line, WHITESPACE);
if (!*cp || *cp == '#')
continue;
- cp = strtok(cp, WHITESPACE);
- {
- char *t = cp;
- for (; *t != 0; t++)
- if ('A' <= *t && *t <= 'Z')
- *t = *t - 'A' + 'a'; /* tolower */
-
- }
- opcode = parse_token(cp, filename, linenum);
+ arg = strsep(&cp, WHITESPACE);
+ opcode = parse_token(arg, filename, linenum);
switch (opcode) {
case sBadOption:
bad_options++;
continue;
case sPort:
- intptr = &options->port;
+ /* ignore ports from configfile if cmdline specifies ports */
+ if (options->ports_from_cmdline)
+ continue;
+ if (options->listen_addrs != NULL)
+ 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",
+ filename, linenum);
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing port number.\n",
+ filename, linenum);
+ options->ports[options->num_ports++] = atoi(arg);
+ break;
+
+ case sServerKeyBits:
+ intptr = &options->server_key_bits;
parse_int:
- cp = strtok(NULL, WHITESPACE);
- if (!cp) {
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0') {
fprintf(stderr, "%s line %d: missing integer value.\n",
filename, linenum);
exit(1);
}
- value = atoi(cp);
+ value = atoi(arg);
if (*intptr == -1)
*intptr = value;
break;
- case sServerKeyBits:
- intptr = &options->server_key_bits;
- goto parse_int;
-
case sLoginGraceTime:
intptr = &options->login_grace_time;
goto parse_int;
goto parse_int;
case sListenAddress:
- cp = strtok(NULL, WHITESPACE);
- if (!cp) {
- fprintf(stderr, "%s line %d: missing inet addr.\n",
- filename, linenum);
- exit(1);
- }
- options->listen_addr.s_addr = inet_addr(cp);
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing inet addr.\n",
+ filename, linenum);
+ add_listen_addr(options, arg);
break;
case sHostKeyFile:
- charptr = &options->host_key_file;
- cp = strtok(NULL, WHITESPACE);
- if (!cp) {
+ case sHostDSAKeyFile:
+ charptr = (opcode == sHostKeyFile ) ?
+ &options->host_key_file : &options->host_dsa_key_file;
+parse_filename:
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0') {
fprintf(stderr, "%s line %d: missing file name.\n",
- filename, linenum);
+ filename, linenum);
exit(1);
}
if (*charptr == NULL)
- *charptr = tilde_expand_filename(cp, getuid());
+ *charptr = tilde_expand_filename(arg, getuid());
break;
+ case sPidFile:
+ charptr = &options->pid_file;
+ goto parse_filename;
+
case sRandomSeedFile:
fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n",
filename, linenum);
- cp = strtok(NULL, WHITESPACE);
+ arg = strsep(&cp, WHITESPACE);
break;
case sPermitRootLogin:
intptr = &options->permit_root_login;
- cp = strtok(NULL, WHITESPACE);
- if (!cp) {
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0') {
fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n",
filename, linenum);
exit(1);
}
- if (strcmp(cp, "without-password") == 0)
+ if (strcmp(arg, "without-password") == 0)
value = 2;
- else if (strcmp(cp, "yes") == 0)
+ else if (strcmp(arg, "yes") == 0)
value = 1;
- else if (strcmp(cp, "no") == 0)
+ else if (strcmp(arg, "no") == 0)
value = 0;
else {
fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n",
- filename, linenum, cp);
+ filename, linenum, arg);
exit(1);
}
if (*intptr == -1)
case sIgnoreRhosts:
intptr = &options->ignore_rhosts;
parse_flag:
- cp = strtok(NULL, WHITESPACE);
- if (!cp) {
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0') {
fprintf(stderr, "%s line %d: missing yes/no argument.\n",
filename, linenum);
exit(1);
}
- if (strcmp(cp, "yes") == 0)
+ if (strcmp(arg, "yes") == 0)
value = 1;
- else if (strcmp(cp, "no") == 0)
+ else if (strcmp(arg, "no") == 0)
value = 0;
else {
fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n",
- filename, linenum, cp);
+ filename, linenum, arg);
exit(1);
}
if (*intptr == -1)
case sIgnoreUserKnownHosts:
intptr = &options->ignore_user_known_hosts;
- goto parse_int;
+ goto parse_flag;
case sRhostsAuthentication:
intptr = &options->rhosts_authentication;
intptr = &options->rsa_authentication;
goto parse_flag;
+ case sDSAAuthentication:
+ intptr = &options->dsa_authentication;
+ goto parse_flag;
+
#ifdef KRB4
case sKerberosAuthentication:
intptr = &options->kerberos_authentication;
intptr = &options->x11_display_offset;
goto parse_int;
+ case sXAuthLocation:
+ charptr = &options->xauth_location;
+ goto parse_filename;
+
case sStrictModes:
intptr = &options->strict_modes;
goto parse_flag;
intptr = &options->use_login;
goto parse_flag;
+ case sGatewayPorts:
+ intptr = &options->gateway_ports;
+ goto parse_flag;
+
case sLogFacility:
intptr = (int *) &options->log_facility;
- cp = strtok(NULL, WHITESPACE);
- value = log_facility_number(cp);
+ arg = strsep(&cp, WHITESPACE);
+ value = log_facility_number(arg);
if (value == (SyslogFacility) - 1)
fatal("%.200s line %d: unsupported log facility '%s'\n",
- filename, linenum, cp ? cp : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*intptr == -1)
*intptr = (SyslogFacility) value;
break;
case sLogLevel:
intptr = (int *) &options->log_level;
- cp = strtok(NULL, WHITESPACE);
- value = log_level_number(cp);
+ arg = strsep(&cp, WHITESPACE);
+ value = log_level_number(arg);
if (value == (LogLevel) - 1)
fatal("%.200s line %d: unsupported log level '%s'\n",
- filename, linenum, cp ? cp : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*intptr == -1)
*intptr = (LogLevel) value;
break;
case sAllowUsers:
- while ((cp = strtok(NULL, WHITESPACE))) {
- if (options->num_allow_users >= MAX_ALLOW_USERS) {
- fprintf(stderr, "%s line %d: too many allow users.\n",
- filename, linenum);
- exit(1);
- }
- options->allow_users[options->num_allow_users++] = xstrdup(cp);
+ while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+ if (options->num_allow_users >= MAX_ALLOW_USERS)
+ fatal("%s line %d: too many allow users.\n",
+ filename, linenum);
+ options->allow_users[options->num_allow_users++] = xstrdup(arg);
}
break;
case sDenyUsers:
- while ((cp = strtok(NULL, WHITESPACE))) {
- if (options->num_deny_users >= MAX_DENY_USERS) {
- fprintf(stderr, "%s line %d: too many deny users.\n",
- filename, linenum);
- exit(1);
- }
- options->deny_users[options->num_deny_users++] = xstrdup(cp);
+ while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+ if (options->num_deny_users >= MAX_DENY_USERS)
+ fatal( "%s line %d: too many deny users.\n",
+ filename, linenum);
+ options->deny_users[options->num_deny_users++] = xstrdup(arg);
}
break;
case sAllowGroups:
- while ((cp = strtok(NULL, WHITESPACE))) {
- if (options->num_allow_groups >= MAX_ALLOW_GROUPS) {
- fprintf(stderr, "%s line %d: too many allow groups.\n",
- filename, linenum);
- exit(1);
- }
- options->allow_groups[options->num_allow_groups++] = xstrdup(cp);
+ while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+ if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
+ fatal("%s line %d: too many allow groups.\n",
+ filename, linenum);
+ options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
}
break;
case sDenyGroups:
- while ((cp = strtok(NULL, WHITESPACE))) {
- if (options->num_deny_groups >= MAX_DENY_GROUPS) {
- fprintf(stderr, "%s line %d: too many deny groups.\n",
- filename, linenum);
- exit(1);
- }
- options->deny_groups[options->num_deny_groups++] = xstrdup(cp);
+ while ((arg = strsep(&cp, WHITESPACE)) && *arg != '\0') {
+ if (options->num_deny_groups >= MAX_DENY_GROUPS)
+ fatal("%s line %d: too many deny groups.\n",
+ filename, linenum);
+ options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
}
break;
+ case sCiphers:
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: Missing argument.", filename, linenum);
+ if (!ciphers_valid(arg))
+ fatal("%s line %d: Bad SSH2 cipher spec '%s'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (options->ciphers == NULL)
+ options->ciphers = xstrdup(arg);
+ break;
+
+ case sProtocol:
+ intptr = &options->protocol;
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: Missing argument.", filename, linenum);
+ value = proto_spec(arg);
+ if (value == SSH_PROTO_UNKNOWN)
+ fatal("%s line %d: Bad protocol spec '%s'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*intptr == SSH_PROTO_UNKNOWN)
+ *intptr = value;
+ break;
+
+ case sSubsystem:
+ if(options->num_subsystems >= MAX_SUBSYSTEMS) {
+ fatal("%s line %d: too many subsystems defined.",
+ filename, linenum);
+ }
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: Missing subsystem name.",
+ filename, linenum);
+ for (i = 0; i < options->num_subsystems; i++)
+ if(strcmp(arg, options->subsystem_name[i]) == 0)
+ fatal("%s line %d: Subsystem '%s' already defined.",
+ filename, linenum, arg);
+ options->subsystem_name[options->num_subsystems] = xstrdup(arg);
+ arg = strsep(&cp, WHITESPACE);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: Missing subsystem command.",
+ filename, linenum);
+ options->subsystem_command[options->num_subsystems] = xstrdup(arg);
+ options->num_subsystems++;
+ break;
+
+ case sMaxStartups:
+ intptr = &options->max_startups;
+ goto parse_int;
+
default:
fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n",
- filename, linenum, cp, opcode);
+ filename, linenum, arg, opcode);
exit(1);
}
- if (strtok(NULL, WHITESPACE) != NULL) {
- fprintf(stderr, "%s line %d: garbage at end of line.\n",
- filename, linenum);
+ if ((arg = strsep(&cp, WHITESPACE)) != NULL && *arg != '\0') {
+ fprintf(stderr,
+ "%s line %d: garbage at end of line; \"%.200s\".\n",
+ filename, linenum, arg);
exit(1);
}
}
andersk / openssh.git / blobdiff