/*
-
-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
-
-*/
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * 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("$Id$");
+RCSID("$OpenBSD: servconf.c,v 1.62 2001/01/21 19:05:55 markus 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"
+
+
+/* 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 initialize_server_options(ServerOptions *options)
+void
+initialize_server_options(ServerOptions *options)
{
- memset(options, 0, sizeof(*options));
- options->port = -1;
- options->listen_addr.s_addr = htonl(INADDR_ANY);
- options->host_key_file = NULL;
- options->server_key_bits = -1;
- options->login_grace_time = -1;
- options->key_regeneration_time = -1;
- options->permit_root_login = -1;
- options->ignore_rhosts = -1;
- options->print_motd = -1;
- options->check_mail = -1;
- options->x11_forwarding = -1;
- options->x11_display_offset = -1;
- options->strict_modes = -1;
- options->keepalives = -1;
- options->log_facility = (SyslogFacility)-1;
- options->log_level = (LogLevel)-1;
- options->rhosts_authentication = -1;
- options->rhosts_rsa_authentication = -1;
- options->rsa_authentication = -1;
+ memset(options, 0, sizeof(*options));
+ options->num_ports = 0;
+ options->ports_from_cmdline = 0;
+ options->listen_addrs = 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->ignore_rhosts = -1;
+ options->ignore_user_known_hosts = -1;
+ options->print_motd = -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->log_level = (LogLevel) - 1;
+ options->rhosts_authentication = -1;
+ options->rhosts_rsa_authentication = -1;
+ options->rsa_authentication = -1;
+ options->pubkey_authentication = -1;
#ifdef KRB4
- options->kerberos_authentication = -1;
- options->kerberos_or_local_passwd = -1;
- options->kerberos_ticket_cleanup = -1;
+ options->kerberos_authentication = -1;
+ options->kerberos_or_local_passwd = -1;
+ options->kerberos_ticket_cleanup = -1;
#endif
#ifdef AFS
- options->kerberos_tgt_passing = -1;
- options->afs_token_passing = -1;
-#endif
- options->password_authentication = -1;
-#ifdef SKEY
- options->skey_authentication = -1;
+ options->kerberos_tgt_passing = -1;
+ options->afs_token_passing = -1;
#endif
- options->permit_empty_passwd = -1;
- options->use_login = -1;
- options->num_allow_users = 0;
- options->num_deny_users = 0;
- options->num_allow_groups = 0;
- options->num_deny_groups = 0;
+ options->password_authentication = -1;
+ options->kbd_interactive_authentication = -1;
+ options->skey_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->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;
}
-void fill_default_server_options(ServerOptions *options)
+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->host_key_file == NULL)
- options->host_key_file = HOST_KEY_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->ignore_rhosts == -1)
- options->ignore_rhosts = 0;
- if (options->check_mail == -1)
- options->check_mail = 0;
- if (options->print_motd == -1)
- options->print_motd = 1;
- if (options->x11_forwarding == -1)
- options->x11_forwarding = 1;
- if (options->x11_display_offset == -1)
- options->x11_display_offset = 1;
- if (options->strict_modes == -1)
- options->strict_modes = 1;
- if (options->keepalives == -1)
- options->keepalives = 1;
- if (options->log_facility == (SyslogFacility)(-1))
- options->log_facility = SYSLOG_FACILITY_AUTH;
- if (options->log_level == (LogLevel)(-1))
- 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 = 1;
- if (options->rsa_authentication == -1)
- options->rsa_authentication = 1;
+ 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->pid_file == NULL)
+ 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->ignore_rhosts == -1)
+ options->ignore_rhosts = 1;
+ if (options->ignore_user_known_hosts == -1)
+ options->ignore_user_known_hosts = 0;
+ if (options->check_mail == -1)
+ options->check_mail = 0;
+ if (options->print_motd == -1)
+ options->print_motd = 1;
+ if (options->x11_forwarding == -1)
+ options->x11_forwarding = 0;
+ if (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)
+ options->keepalives = 1;
+ if (options->log_facility == (SyslogFacility) (-1))
+ options->log_facility = SYSLOG_FACILITY_AUTH;
+ if (options->log_level == (LogLevel) (-1))
+ 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->rsa_authentication == -1)
+ options->rsa_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);
- if (options->kerberos_or_local_passwd == -1)
- options->kerberos_or_local_passwd = 1;
- if (options->kerberos_ticket_cleanup == -1)
- options->kerberos_ticket_cleanup = 1;
+ if (options->kerberos_authentication == -1)
+ options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
+ if (options->kerberos_or_local_passwd == -1)
+ options->kerberos_or_local_passwd = 1;
+ if (options->kerberos_ticket_cleanup == -1)
+ options->kerberos_ticket_cleanup = 1;
#endif /* KRB4 */
#ifdef AFS
- if (options->kerberos_tgt_passing == -1)
- options->kerberos_tgt_passing = 0;
- if (options->afs_token_passing == -1)
- options->afs_token_passing = k_hasafs();
+ if (options->kerberos_tgt_passing == -1)
+ options->kerberos_tgt_passing = 0;
+ if (options->afs_token_passing == -1)
+ options->afs_token_passing = k_hasafs();
#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->permit_empty_passwd == -1)
- options->permit_empty_passwd = 1;
- if (options->use_login == -1)
- options->use_login = 0;
+ if (options->password_authentication == -1)
+ options->password_authentication = 1;
+ if (options->kbd_interactive_authentication == -1)
+ options->kbd_interactive_authentication = 0;
+ if (options->skey_authentication == -1)
+ options->skey_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->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;
}
-#define WHITESPACE " \t\r\n"
-
/* Keyword tokens. */
-typedef enum
-{
- sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
- sPermitRootLogin, sLogFacility, sLogLevel,
- sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
+typedef enum {
+ sBadOption, /* == unknown option */
+ sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
+ sPermitRootLogin, sLogFacility, sLogLevel,
+ sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
#ifdef KRB4
- sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
+ sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
#endif
#ifdef AFS
- sKerberosTgtPassing, sAFSTokenPassing,
+ sKerberosTgtPassing, sAFSTokenPassing,
#endif
-#ifdef SKEY
- sSkeyAuthentication,
-#endif
- sPasswordAuthentication, sListenAddress,
- sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset,
- sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail,
- sUseLogin, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups
-
+ sSkeyAuthentication,
+ sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
+ sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset,
+ sStrictModes, sEmptyPasswd, sRandomSeedFile, sKeepAlives, sCheckMail,
+ sUseLogin, sAllowTcpForwarding,
+ sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
+ sIgnoreUserKnownHosts, sCiphers, sProtocol, sPidFile,
+ sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
+ sBanner
} ServerOpCodes;
/* Textual representation of the tokens. */
-static struct
-{
- const char *name;
- ServerOpCodes opcode;
-} keywords[] =
-{
- { "port", sPort },
- { "hostkey", sHostKeyFile },
- { "serverkeybits", sServerKeyBits },
- { "logingracetime", sLoginGraceTime },
- { "keyregenerationinterval", sKeyRegenerationTime },
- { "permitrootlogin", sPermitRootLogin },
- { "syslogfacility", sLogFacility },
- { "loglevel", sLogLevel },
- { "rhostsauthentication", sRhostsAuthentication },
- { "rhostsrsaauthentication", sRhostsRSAAuthentication },
- { "rsaauthentication", sRSAAuthentication },
+static struct {
+ const char *name;
+ ServerOpCodes opcode;
+} keywords[] = {
+ { "port", sPort },
+ { "hostkey", sHostKeyFile },
+ { "hostdsakey", sHostKeyFile }, /* alias */
+ { "pidfile", sPidFile },
+ { "serverkeybits", sServerKeyBits },
+ { "logingracetime", sLoginGraceTime },
+ { "keyregenerationinterval", sKeyRegenerationTime },
+ { "permitrootlogin", sPermitRootLogin },
+ { "syslogfacility", sLogFacility },
+ { "loglevel", sLogLevel },
+ { "rhostsauthentication", sRhostsAuthentication },
+ { "rhostsrsaauthentication", sRhostsRSAAuthentication },
+ { "rsaauthentication", sRSAAuthentication },
+ { "pubkeyauthentication", sPubkeyAuthentication },
+ { "dsaauthentication", sPubkeyAuthentication }, /* alias */
#ifdef KRB4
- { "kerberosauthentication", sKerberosAuthentication },
- { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
- { "kerberosticketcleanup", sKerberosTicketCleanup },
+ { "kerberosauthentication", sKerberosAuthentication },
+ { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
+ { "kerberosticketcleanup", sKerberosTicketCleanup },
#endif
#ifdef AFS
- { "kerberostgtpassing", sKerberosTgtPassing },
- { "afstokenpassing", sAFSTokenPassing },
-#endif
- { "passwordauthentication", sPasswordAuthentication },
-#ifdef SKEY
- { "skeyauthentication", sSkeyAuthentication },
+ { "kerberostgtpassing", sKerberosTgtPassing },
+ { "afstokenpassing", sAFSTokenPassing },
#endif
- { "checkmail", sCheckMail },
- { "listenaddress", sListenAddress },
- { "printmotd", sPrintMotd },
- { "ignorerhosts", sIgnoreRhosts },
- { "x11forwarding", sX11Forwarding },
- { "x11displayoffset", sX11DisplayOffset },
- { "strictmodes", sStrictModes },
- { "permitemptypasswords", sEmptyPasswd },
- { "uselogin", sUseLogin },
- { "randomseed", sRandomSeedFile },
- { "keepalive", sKeepAlives },
- { "allowusers", sAllowUsers },
- { "denyusers", sDenyUsers },
- { "allowgroups", sAllowGroups },
- { "denygroups", sDenyGroups },
- { NULL, 0 }
+ { "passwordauthentication", sPasswordAuthentication },
+ { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
+ { "skeyauthentication", sSkeyAuthentication },
+ { "checkmail", sCheckMail },
+ { "listenaddress", sListenAddress },
+ { "printmotd", sPrintMotd },
+ { "ignorerhosts", sIgnoreRhosts },
+ { "ignoreuserknownhosts", sIgnoreUserKnownHosts },
+ { "x11forwarding", sX11Forwarding },
+ { "x11displayoffset", sX11DisplayOffset },
+ { "xauthlocation", sXAuthLocation },
+ { "strictmodes", sStrictModes },
+ { "permitemptypasswords", sEmptyPasswd },
+ { "uselogin", sUseLogin },
+ { "randomseed", sRandomSeedFile },
+ { "keepalive", sKeepAlives },
+ { "allowtcpforwarding", sAllowTcpForwarding },
+ { "allowusers", sAllowUsers },
+ { "denyusers", sDenyUsers },
+ { "allowgroups", sAllowGroups },
+ { "denygroups", sDenyGroups },
+ { "ciphers", sCiphers },
+ { "protocol", sProtocol },
+ { "gatewayports", sGatewayPorts },
+ { "subsystem", sSubsystem },
+ { "maxstartups", sMaxStartups },
+ { "banner", sBanner },
+ { NULL, 0 }
};
-static struct
-{
- const char *name;
- SyslogFacility facility;
-} log_facilities[] =
-{
- { "DAEMON", SYSLOG_FACILITY_DAEMON },
- { "USER", SYSLOG_FACILITY_USER },
- { "AUTH", SYSLOG_FACILITY_AUTH },
- { "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
- { "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
- { "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
- { "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
- { "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
- { "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
- { "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
- { "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
- { NULL, 0 }
-};
+/*
+ * Returns the number of the token pointed to by cp of length len. Never
+ * returns if the token is not known.
+ */
-static struct
-{
- const char *name;
- LogLevel level;
-} log_levels[] =
+static ServerOpCodes
+parse_token(const char *cp, const char *filename,
+ int linenum)
{
- { "QUIET", SYSLOG_LEVEL_QUIET },
- { "FATAL", SYSLOG_LEVEL_FATAL },
- { "ERROR", SYSLOG_LEVEL_ERROR },
- { "INFO", SYSLOG_LEVEL_INFO },
- { "CHAT", SYSLOG_LEVEL_CHAT },
- { "DEBUG", SYSLOG_LEVEL_DEBUG },
- { NULL, 0 }
-};
+ u_int i;
-/* Returns the number of the token pointed to by cp of length len.
- Never returns if the token is not known. */
+ for (i = 0; keywords[i].name; i++)
+ if (strcasecmp(cp, keywords[i].name) == 0)
+ return keywords[i].opcode;
-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)
- return keywords[i].opcode;
+ fprintf(stderr, "%s: line %d: Bad configuration option: %s\n",
+ filename, linenum, cp);
+ return sBadOption;
+}
- fprintf(stderr, "%s line %d: Bad configuration option: %s\n",
- filename, linenum, cp);
- exit(1);
+/*
+ * add listen address
+ */
+void
+add_listen_addr(ServerOptions *options, char *addr)
+{
+ 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 read_server_config(ServerOptions *options, const char *filename)
+void
+read_server_config(ServerOptions *options, const char *filename)
{
- FILE *f;
- char line[1024];
- char *cp, **charptr;
- int linenum, *intptr, i, value;
- ServerOpCodes opcode;
-
- f = fopen(filename, "r");
- if (!f)
- {
- perror(filename);
- exit(1);
- }
-
- linenum = 0;
- while (fgets(line, sizeof(line), f))
- {
- linenum++;
- 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);
- switch (opcode)
- {
- case sPort:
- intptr = &options->port;
- parse_int:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing integer value.\n",
- filename, linenum);
- exit(1);
- }
- value = atoi(cp);
- 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;
-
- case sKeyRegenerationTime:
- intptr = &options->key_regeneration_time;
- 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);
- break;
-
- case sHostKeyFile:
- charptr = &options->host_key_file;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing file name.\n",
- filename, linenum);
- exit(1);
- }
- if (*charptr == NULL)
- *charptr = tilde_expand_filename(cp, getuid());
- break;
-
- case sRandomSeedFile:
- fprintf(stderr, "%s line %d: \"randomseed\" option is obsolete.\n",
- filename, linenum);
- cp = strtok(NULL, WHITESPACE);
- break;
-
- case sPermitRootLogin:
- intptr = &options->permit_root_login;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing yes/without-password/no argument.\n",
- filename, linenum);
- exit(1);
- }
- if (strcmp(cp, "without-password") == 0)
- value = 2;
- else if (strcmp(cp, "yes") == 0)
- value = 1;
- else if (strcmp(cp, "no") == 0)
- value = 0;
- else
- {
- fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n",
- filename, linenum, cp);
- exit(1);
- }
- if (*intptr == -1)
- *intptr = value;
- break;
-
- case sIgnoreRhosts:
- intptr = &options->ignore_rhosts;
- parse_flag:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing yes/no argument.\n",
- filename, linenum);
- exit(1);
- }
- if (strcmp(cp, "yes") == 0)
- value = 1;
- else
- if (strcmp(cp, "no") == 0)
- value = 0;
- else
- {
- fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n",
- filename, linenum, cp);
+ FILE *f;
+ char line[1024];
+ char *cp, **charptr, *arg;
+ int linenum, *intptr, value;
+ int bad_options = 0;
+ ServerOpCodes opcode;
+ int i;
+
+ f = fopen(filename, "r");
+ if (!f) {
+ perror(filename);
exit(1);
- }
- if (*intptr == -1)
- *intptr = value;
- break;
-
- case sRhostsAuthentication:
- intptr = &options->rhosts_authentication;
- goto parse_flag;
-
- case sRhostsRSAAuthentication:
- intptr = &options->rhosts_rsa_authentication;
- goto parse_flag;
-
- case sRSAAuthentication:
- intptr = &options->rsa_authentication;
- goto parse_flag;
-
+ }
+ linenum = 0;
+ while (fgets(line, sizeof(line), f)) {
+ linenum++;
+ cp = line;
+ arg = strdelim(&cp);
+ /* Ignore leading whitespace */
+ if (*arg == '\0')
+ arg = strdelim(&cp);
+ if (!arg || !*arg || *arg == '#')
+ continue;
+ intptr = NULL;
+ charptr = NULL;
+ opcode = parse_token(arg, filename, linenum);
+ switch (opcode) {
+ case sBadOption:
+ bad_options++;
+ continue;
+ case sPort:
+ /* 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 = strdelim(&cp);
+ 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:
+ arg = strdelim(&cp);
+ if (!arg || *arg == '\0') {
+ fprintf(stderr, "%s line %d: missing integer value.\n",
+ filename, linenum);
+ exit(1);
+ }
+ value = atoi(arg);
+ if (*intptr == -1)
+ *intptr = value;
+ break;
+
+ case sLoginGraceTime:
+ intptr = &options->login_grace_time;
+ goto parse_int;
+
+ case sKeyRegenerationTime:
+ intptr = &options->key_regeneration_time;
+ goto parse_int;
+
+ case sListenAddress:
+ arg = strdelim(&cp);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing inet addr.\n",
+ filename, linenum);
+ add_listen_addr(options, arg);
+ break;
+
+ case sHostKeyFile:
+ 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') {
+ fprintf(stderr, "%s line %d: missing file name.\n",
+ filename, linenum);
+ exit(1);
+ }
+ 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);
+ exit(1);
+ }
+ if (strcmp(arg, "without-password") == 0)
+ value = 2;
+ else if (strcmp(arg, "yes") == 0)
+ value = 1;
+ else if (strcmp(arg, "no") == 0)
+ value = 0;
+ else {
+ fprintf(stderr, "%s line %d: Bad yes/without-password/no argument: %s\n",
+ filename, linenum, arg);
+ exit(1);
+ }
+ if (*intptr == -1)
+ *intptr = value;
+ break;
+
+ case sIgnoreRhosts:
+ intptr = &options->ignore_rhosts;
+parse_flag:
+ arg = strdelim(&cp);
+ if (!arg || *arg == '\0') {
+ fprintf(stderr, "%s line %d: missing yes/no argument.\n",
+ filename, linenum);
+ exit(1);
+ }
+ if (strcmp(arg, "yes") == 0)
+ value = 1;
+ else if (strcmp(arg, "no") == 0)
+ value = 0;
+ else {
+ fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n",
+ filename, linenum, arg);
+ exit(1);
+ }
+ if (*intptr == -1)
+ *intptr = value;
+ break;
+
+ case sIgnoreUserKnownHosts:
+ 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;
+
+ case sRSAAuthentication:
+ intptr = &options->rsa_authentication;
+ goto parse_flag;
+
+ case sPubkeyAuthentication:
+ intptr = &options->pubkey_authentication;
+ goto parse_flag;
+
#ifdef KRB4
- case sKerberosAuthentication:
- intptr = &options->kerberos_authentication;
- goto parse_flag;
-
- case sKerberosOrLocalPasswd:
- intptr = &options->kerberos_or_local_passwd;
- goto parse_flag;
-
- case sKerberosTicketCleanup:
- intptr = &options->kerberos_ticket_cleanup;
- goto parse_flag;
-#endif
-
-#ifdef AFS
- case sKerberosTgtPassing:
- intptr = &options->kerberos_tgt_passing;
- goto parse_flag;
+ case sKerberosAuthentication:
+ intptr = &options->kerberos_authentication;
+ goto parse_flag;
- case sAFSTokenPassing:
- intptr = &options->afs_token_passing;
- goto parse_flag;
-#endif
+ case sKerberosOrLocalPasswd:
+ intptr = &options->kerberos_or_local_passwd;
+ goto parse_flag;
- case sPasswordAuthentication:
- intptr = &options->password_authentication;
- goto parse_flag;
+ case sKerberosTicketCleanup:
+ intptr = &options->kerberos_ticket_cleanup;
+ goto parse_flag;
+#endif
- case sCheckMail:
- intptr = &options->check_mail;
- goto parse_flag;
+#ifdef AFS
+ case sKerberosTgtPassing:
+ intptr = &options->kerberos_tgt_passing;
+ goto parse_flag;
-#ifdef SKEY
- case sSkeyAuthentication:
- intptr = &options->skey_authentication;
- goto parse_flag;
+ case sAFSTokenPassing:
+ intptr = &options->afs_token_passing;
+ goto parse_flag;
#endif
- case sPrintMotd:
- intptr = &options->print_motd;
- goto parse_flag;
-
- case sX11Forwarding:
- intptr = &options->x11_forwarding;
- goto parse_flag;
-
- case sX11DisplayOffset:
- intptr = &options->x11_display_offset;
- goto parse_int;
-
- case sStrictModes:
- intptr = &options->strict_modes;
- goto parse_flag;
-
- case sKeepAlives:
- intptr = &options->keepalives;
- goto parse_flag;
-
- case sEmptyPasswd:
- intptr = &options->permit_empty_passwd;
- goto parse_flag;
-
- case sUseLogin:
- intptr = &options->use_login;
- goto parse_flag;
-
- case sLogFacility:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing facility name.\n",
- filename, linenum);
- exit(1);
- }
- for (i = 0; log_facilities[i].name; i++)
- if (strcasecmp(log_facilities[i].name, cp) == 0)
- break;
- if (!log_facilities[i].name)
- {
- fprintf(stderr, "%s line %d: unsupported log facility %s\n",
- filename, linenum, cp);
- exit(1);
- }
- if (options->log_facility == (SyslogFacility)(-1))
- options->log_facility = log_facilities[i].facility;
- break;
-
- case sLogLevel:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- {
- fprintf(stderr, "%s line %d: missing level name.\n",
- filename, linenum);
- exit(1);
- }
- for (i = 0; log_levels[i].name; i++)
- if (strcasecmp(log_levels[i].name, cp) == 0)
- break;
- if (!log_levels[i].name)
- {
- fprintf(stderr, "%s line %d: unsupported log level %s\n",
- filename, linenum, cp);
- exit(1);
- }
- if (options->log_level == (LogLevel)(-1))
- options->log_level = log_levels[i].level;
- 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);
- }
- 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);
+ case sPasswordAuthentication:
+ 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;
+
+ case sSkeyAuthentication:
+ intptr = &options->skey_authentication;
+ goto parse_flag;
+
+ case sPrintMotd:
+ intptr = &options->print_motd;
+ goto parse_flag;
+
+ case sX11Forwarding:
+ intptr = &options->x11_forwarding;
+ goto parse_flag;
+
+ case sX11DisplayOffset:
+ 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;
+
+ case sKeepAlives:
+ intptr = &options->keepalives;
+ goto parse_flag;
+
+ case sEmptyPasswd:
+ intptr = &options->permit_empty_passwd;
+ goto parse_flag;
+
+ case sUseLogin:
+ intptr = &options->use_login;
+ goto parse_flag;
+
+ case sGatewayPorts:
+ intptr = &options->gateway_ports;
+ 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",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*intptr == -1)
+ *intptr = (SyslogFacility) value;
+ break;
+
+ case sLogLevel:
+ intptr = (int *) &options->log_level;
+ arg = strdelim(&cp);
+ value = log_level_number(arg);
+ if (value == (LogLevel) - 1)
+ fatal("%.200s line %d: unsupported log level '%s'\n",
+ 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",
+ filename, linenum);
+ options->allow_users[options->num_allow_users++] = xstrdup(arg);
+ }
+ break;
+
+ 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",
+ filename, linenum);
+ options->deny_users[options->num_deny_users++] = xstrdup(arg);
+ }
+ break;
+
+ 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",
+ filename, linenum);
+ options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
+ }
+ break;
+
+ 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",
+ filename, linenum);
+ options->deny_groups[options->num_deny_groups++] = xstrdup(arg);
+ }
+ break;
+
+ case sCiphers:
+ arg = strdelim(&cp);
+ 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 = strdelim(&cp);
+ 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 = strdelim(&cp);
+ 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 = strdelim(&cp);
+ 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:
+ 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);
}
- options->deny_users[options->num_deny_users++] = xstrdup(cp);
- }
- 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);
+ if ((arg = strdelim(&cp)) != NULL && *arg != '\0') {
+ fprintf(stderr,
+ "%s line %d: garbage at end of line; \"%.200s\".\n",
+ filename, linenum, arg);
+ exit(1);
}
- options->allow_groups[options->num_allow_groups++] = xstrdup(cp);
- }
- 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);
- }
- break;
-
- default:
- fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n",
- filename, linenum, cp, opcode);
- exit(1);
}
- if (strtok(NULL, WHITESPACE) != NULL)
- {
- fprintf(stderr, "%s line %d: garbage at end of line.\n",
- filename, linenum);
- exit(1);
+ fclose(f);
+ if (bad_options > 0) {
+ fprintf(stderr, "%s: terminating, %d bad configuration options\n",
+ filename, bad_options);
+ exit(1);
}
- }
- fclose(f);
}
andersk / openssh.git / blobdiff