+/* $OpenBSD: readconf.c,v 1.182 2010/01/09 23:04:13 dtucker Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: readconf.c,v 1.90 2001/09/19 19:24:18 stevesk Exp $");
-#include "ssh.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
#include "xmalloc.h"
+#include "ssh.h"
#include "compat.h"
#include "cipher.h"
#include "pathnames.h"
#include "log.h"
+#include "key.h"
#include "readconf.h"
#include "match.h"
#include "misc.h"
+#include "buffer.h"
#include "kex.h"
#include "mac.h"
# that they are given in.
Host *.ngs.fi ngs.fi
- FallBackToRsh no
+ User foo
Host fake.com
HostName another.host.name.real.org
Host fascist.blob.com
Port 23123
User tylonen
- RhostsAuthentication no
PasswordAuthentication no
Host puukko.hut.fi
ProxyCommand ssh-proxy %h %p
Host *.fr
- UseRsh yes
+ PublicKeyAuthentication no
Host *.su
Cipher none
PasswordAuthentication no
+ Host vpn.fake.com
+ Tunnel yes
+ TunnelDevice 3
+
# Defaults for various options
Host *
ForwardAgent no
ForwardX11 no
- RhostsAuthentication yes
PasswordAuthentication yes
RSAAuthentication yes
RhostsRSAAuthentication yes
- FallBackToRsh no
- UseRsh no
StrictHostKeyChecking yes
- KeepAlives no
+ TcpKeepAlive no
IdentityFile ~/.ssh/identity
Port 22
EscapeChar ~
typedef enum {
oBadOption,
- oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
- oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
+ oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
+ oExitOnForwardFailure,
+ oPasswordAuthentication, oRSAAuthentication,
oChallengeResponseAuthentication, oXAuthLocation,
-#if defined(KRB4) || defined(KRB5)
- oKerberosAuthentication,
-#endif
-#if defined(AFS) || defined(KRB5)
- oKerberosTgtPassing,
-#endif
-#ifdef AFS
- oAFSTokenPassing,
-#endif
oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
- oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts,
+ oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
- oClearAllForwardings
+ oClearAllForwardings, oNoHostAuthenticationForLocalhost,
+ oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
+ oAddressFamily, oGssAuthentication, oGssDelegateCreds,
+ oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
+ oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
+ oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
+ oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication,
+ oDeprecated, oUnsupported
} OpCodes;
/* Textual representations of the tokens. */
} keywords[] = {
{ "forwardagent", oForwardAgent },
{ "forwardx11", oForwardX11 },
+ { "forwardx11trusted", oForwardX11Trusted },
+ { "exitonforwardfailure", oExitOnForwardFailure },
{ "xauthlocation", oXAuthLocation },
{ "gatewayports", oGatewayPorts },
{ "useprivilegedport", oUsePrivilegedPort },
- { "rhostsauthentication", oRhostsAuthentication },
+ { "rhostsauthentication", oDeprecated },
{ "passwordauthentication", oPasswordAuthentication },
{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
{ "kbdinteractivedevices", oKbdInteractiveDevices },
{ "challengeresponseauthentication", oChallengeResponseAuthentication },
{ "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
{ "tisauthentication", oChallengeResponseAuthentication }, /* alias */
-#if defined(KRB4) || defined(KRB5)
- { "kerberosauthentication", oKerberosAuthentication },
+ { "kerberosauthentication", oUnsupported },
+ { "kerberostgtpassing", oUnsupported },
+ { "afstokenpassing", oUnsupported },
+#if defined(GSSAPI)
+ { "gssapiauthentication", oGssAuthentication },
+ { "gssapidelegatecredentials", oGssDelegateCreds },
+#else
+ { "gssapiauthentication", oUnsupported },
+ { "gssapidelegatecredentials", oUnsupported },
#endif
-#if defined(AFS) || defined(KRB5)
- { "kerberostgtpassing", oKerberosTgtPassing },
-#endif
-#ifdef AFS
- { "afstokenpassing", oAFSTokenPassing },
-#endif
- { "fallbacktorsh", oFallBackToRsh },
- { "usersh", oUseRsh },
+ { "fallbacktorsh", oDeprecated },
+ { "usersh", oDeprecated },
{ "identityfile", oIdentityFile },
- { "identityfile2", oIdentityFile }, /* alias */
+ { "identityfile2", oIdentityFile }, /* obsolete */
+ { "identitiesonly", oIdentitiesOnly },
{ "hostname", oHostName },
{ "hostkeyalias", oHostKeyAlias },
{ "proxycommand", oProxyCommand },
{ "host", oHost },
{ "escapechar", oEscapeChar },
{ "globalknownhostsfile", oGlobalKnownHostsFile },
- { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
- { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
+ { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */
+ { "userknownhostsfile", oUserKnownHostsFile },
{ "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
{ "connectionattempts", oConnectionAttempts },
{ "batchmode", oBatchMode },
{ "stricthostkeychecking", oStrictHostKeyChecking },
{ "compression", oCompression },
{ "compressionlevel", oCompressionLevel },
- { "keepalive", oKeepAlives },
+ { "tcpkeepalive", oTCPKeepAlive },
+ { "keepalive", oTCPKeepAlive }, /* obsolete */
{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
{ "loglevel", oLogLevel },
{ "dynamicforward", oDynamicForward },
{ "preferredauthentications", oPreferredAuthentications },
{ "hostkeyalgorithms", oHostKeyAlgorithms },
{ "bindaddress", oBindAddress },
+#ifdef SMARTCARD
{ "smartcarddevice", oSmartcardDevice },
- { "clearallforwardings", oClearAllForwardings },
- { NULL, 0 }
+#else
+ { "smartcarddevice", oUnsupported },
+#endif
+ { "clearallforwardings", oClearAllForwardings },
+ { "enablesshkeysign", oEnableSSHKeysign },
+ { "verifyhostkeydns", oVerifyHostKeyDNS },
+ { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
+ { "rekeylimit", oRekeyLimit },
+ { "connecttimeout", oConnectTimeout },
+ { "addressfamily", oAddressFamily },
+ { "serveraliveinterval", oServerAliveInterval },
+ { "serveralivecountmax", oServerAliveCountMax },
+ { "sendenv", oSendEnv },
+ { "controlpath", oControlPath },
+ { "controlmaster", oControlMaster },
+ { "hashknownhosts", oHashKnownHosts },
+ { "tunnel", oTunnel },
+ { "tunneldevice", oTunnelDevice },
+ { "localcommand", oLocalCommand },
+ { "permitlocalcommand", oPermitLocalCommand },
+ { "visualhostkey", oVisualHostKey },
+ { "useroaming", oUseRoaming },
+#ifdef JPAKE
+ { "zeroknowledgepasswordauthentication",
+ oZeroKnowledgePasswordAuthentication },
+#else
+ { "zeroknowledgepasswordauthentication", oUnsupported },
+#endif
+
+ { NULL, oBadOption }
};
/*
*/
void
-add_local_forward(Options *options, u_short port, const char *host,
- u_short host_port)
+add_local_forward(Options *options, const Forward *newfwd)
{
Forward *fwd;
-#ifndef HAVE_CYGWIN
+#ifndef NO_IPPORT_RESERVED_CONCEPT
extern uid_t original_real_uid;
- if (port < IPPORT_RESERVED && original_real_uid != 0)
+ if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0)
fatal("Privileged ports can only be forwarded by root.");
#endif
if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
fwd = &options->local_forwards[options->num_local_forwards++];
- fwd->port = port;
- fwd->host = xstrdup(host);
- fwd->host_port = host_port;
+
+ fwd->listen_host = newfwd->listen_host;
+ fwd->listen_port = newfwd->listen_port;
+ fwd->connect_host = newfwd->connect_host;
+ fwd->connect_port = newfwd->connect_port;
}
/*
*/
void
-add_remote_forward(Options *options, u_short port, const char *host,
- u_short host_port)
+add_remote_forward(Options *options, const Forward *newfwd)
{
Forward *fwd;
if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
fatal("Too many remote forwards (max %d).",
- SSH_MAX_FORWARDS_PER_DIRECTION);
+ SSH_MAX_FORWARDS_PER_DIRECTION);
fwd = &options->remote_forwards[options->num_remote_forwards++];
- fwd->port = port;
- fwd->host = xstrdup(host);
- fwd->host_port = host_port;
+
+ fwd->listen_host = newfwd->listen_host;
+ fwd->listen_port = newfwd->listen_port;
+ fwd->connect_host = newfwd->connect_host;
+ fwd->connect_port = newfwd->connect_port;
}
static void
{
int i;
- for (i = 0; i < options->num_local_forwards; i++)
- xfree(options->local_forwards[i].host);
+ for (i = 0; i < options->num_local_forwards; i++) {
+ if (options->local_forwards[i].listen_host != NULL)
+ xfree(options->local_forwards[i].listen_host);
+ xfree(options->local_forwards[i].connect_host);
+ }
options->num_local_forwards = 0;
- for (i = 0; i < options->num_remote_forwards; i++)
- xfree(options->remote_forwards[i].host);
+ for (i = 0; i < options->num_remote_forwards; i++) {
+ if (options->remote_forwards[i].listen_host != NULL)
+ xfree(options->remote_forwards[i].listen_host);
+ xfree(options->remote_forwards[i].connect_host);
+ }
options->num_remote_forwards = 0;
+ options->tun_open = SSH_TUNMODE_NO;
}
/*
* Processes a single option line as used in the configuration files. This
* only sets those values that have not already been set.
*/
+#define WHITESPACE " \t\r\n"
int
process_config_line(Options *options, const char *host,
char *line, const char *filename, int linenum,
int *activep)
{
- char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg;
- int opcode, *intptr, value;
- u_short fwd_port, fwd_host_port;
- char sfwd_host_port[6];
+ char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256];
+ int opcode, *intptr, value, value2, scale;
+ LogLevel *log_level_ptr;
+ long long orig, val64;
+ size_t len;
+ Forward fwd;
+
+ /* Strip trailing whitespace */
+ for (len = strlen(line) - 1; len > 0; len--) {
+ if (strchr(WHITESPACE, line[len]) == NULL)
+ break;
+ line[len] = '\0';
+ }
s = line;
/* Get the keyword. (Each line is supposed to begin with a keyword). */
- keyword = strdelim(&s);
+ if ((keyword = strdelim(&s)) == NULL)
+ return 0;
/* Ignore leading whitespace. */
if (*keyword == '\0')
keyword = strdelim(&s);
/* don't panic, but count bad options */
return -1;
/* NOTREACHED */
+ case oConnectTimeout:
+ intptr = &options->connection_timeout;
+parse_time:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing time value.",
+ filename, linenum);
+ if ((value = convtime(arg)) == -1)
+ fatal("%s line %d: invalid time value.",
+ filename, linenum);
+ if (*activep && *intptr == -1)
+ *intptr = value;
+ break;
+
case oForwardAgent:
intptr = &options->forward_agent;
parse_flag:
intptr = &options->forward_x11;
goto parse_flag;
+ case oForwardX11Trusted:
+ intptr = &options->forward_x11_trusted;
+ goto parse_flag;
+
case oGatewayPorts:
intptr = &options->gateway_ports;
goto parse_flag;
- case oUsePrivilegedPort:
- intptr = &options->use_privileged_port;
+ case oExitOnForwardFailure:
+ intptr = &options->exit_on_forward_failure;
goto parse_flag;
- case oRhostsAuthentication:
- intptr = &options->rhosts_authentication;
+ case oUsePrivilegedPort:
+ intptr = &options->use_privileged_port;
goto parse_flag;
case oPasswordAuthentication:
intptr = &options->password_authentication;
goto parse_flag;
+ case oZeroKnowledgePasswordAuthentication:
+ intptr = &options->zero_knowledge_password_authentication;
+ goto parse_flag;
+
case oKbdInteractiveAuthentication:
intptr = &options->kbd_interactive_authentication;
goto parse_flag;
case oChallengeResponseAuthentication:
intptr = &options->challenge_response_authentication;
goto parse_flag;
-#if defined(KRB4) || defined(KRB5)
- case oKerberosAuthentication:
- intptr = &options->kerberos_authentication;
- goto parse_flag;
-#endif
-#if defined(AFS) || defined(KRB5)
- case oKerberosTgtPassing:
- intptr = &options->kerberos_tgt_passing;
- goto parse_flag;
-#endif
-#ifdef AFS
- case oAFSTokenPassing:
- intptr = &options->afs_token_passing;
- goto parse_flag;
-#endif
- case oFallBackToRsh:
- intptr = &options->fallback_to_rsh;
+
+ case oGssAuthentication:
+ intptr = &options->gss_authentication;
goto parse_flag;
- case oUseRsh:
- intptr = &options->use_rsh;
+ case oGssDelegateCreds:
+ intptr = &options->gss_deleg_creds;
goto parse_flag;
case oBatchMode:
intptr = &options->check_host_ip;
goto parse_flag;
+ case oVerifyHostKeyDNS:
+ intptr = &options->verify_host_key_dns;
+ goto parse_yesnoask;
+
case oStrictHostKeyChecking:
intptr = &options->strict_host_key_checking;
+parse_yesnoask:
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing yes/no/ask argument.",
- filename, linenum);
+ filename, linenum);
value = 0; /* To avoid compiler warning... */
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
value = 1;
intptr = &options->compression;
goto parse_flag;
- case oKeepAlives:
- intptr = &options->keepalives;
+ case oTCPKeepAlive:
+ intptr = &options->tcp_keep_alive;
+ goto parse_flag;
+
+ case oNoHostAuthenticationForLocalhost:
+ intptr = &options->no_host_authentication_for_localhost;
goto parse_flag;
case oNumberOfPasswordPrompts:
intptr = &options->compression_level;
goto parse_int;
+ case oRekeyLimit:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (arg[0] < '0' || arg[0] > '9')
+ fatal("%.200s line %d: Bad number.", filename, linenum);
+ orig = val64 = strtoll(arg, &endofnumber, 10);
+ if (arg == endofnumber)
+ fatal("%.200s line %d: Bad number.", filename, linenum);
+ switch (toupper(*endofnumber)) {
+ case '\0':
+ scale = 1;
+ break;
+ case 'K':
+ scale = 1<<10;
+ break;
+ case 'M':
+ scale = 1<<20;
+ break;
+ case 'G':
+ scale = 1<<30;
+ break;
+ default:
+ fatal("%.200s line %d: Invalid RekeyLimit suffix",
+ filename, linenum);
+ }
+ val64 *= scale;
+ /* detect integer wrap and too-large limits */
+ if ((val64 / scale) != orig || val64 > UINT_MAX)
+ fatal("%.200s line %d: RekeyLimit too large",
+ filename, linenum);
+ if (val64 < 16)
+ fatal("%.200s line %d: RekeyLimit too small",
+ filename, linenum);
+ if (*activep && options->rekey_limit == -1)
+ options->rekey_limit = (u_int32_t)val64;
+ break;
+
case oIdentityFile:
arg = strdelim(&s);
if (!arg || *arg == '\0')
intptr = &options->num_identity_files;
if (*intptr >= SSH_MAX_IDENTITY_FILES)
fatal("%.200s line %d: Too many identity files specified (max %d).",
- filename, linenum, SSH_MAX_IDENTITY_FILES);
- charptr = &options->identity_files[*intptr];
+ filename, linenum, SSH_MAX_IDENTITY_FILES);
+ charptr = &options->identity_files[*intptr];
*charptr = xstrdup(arg);
*intptr = *intptr + 1;
}
case oProxyCommand:
charptr = &options->proxy_command;
- string = xstrdup("");
- while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
- string = xrealloc(string, strlen(string) + strlen(arg) + 2);
- strcat(string, " ");
- strcat(string, arg);
- }
+parse_command:
+ if (s == NULL)
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ len = strspn(s, WHITESPACE "=");
if (*activep && *charptr == NULL)
- *charptr = string;
- else
- xfree(string);
+ *charptr = xstrdup(s + len);
return 0;
case oPort:
value = cipher_number(arg);
if (value == -1)
fatal("%.200s line %d: Bad cipher '%s'.",
- filename, linenum, arg ? arg : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && *intptr == -1)
*intptr = value;
break;
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!ciphers_valid(arg))
fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
- filename, linenum, arg ? arg : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && options->ciphers == NULL)
options->ciphers = xstrdup(arg);
break;
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!mac_valid(arg))
fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
- filename, linenum, arg ? arg : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && options->macs == NULL)
options->macs = xstrdup(arg);
break;
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!key_names_valid2(arg))
fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
- filename, linenum, arg ? arg : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && options->hostkeyalgorithms == NULL)
options->hostkeyalgorithms = xstrdup(arg);
break;
value = proto_spec(arg);
if (value == SSH_PROTO_UNKNOWN)
fatal("%.200s line %d: Bad protocol spec '%s'.",
- filename, linenum, arg ? arg : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && *intptr == SSH_PROTO_UNKNOWN)
*intptr = value;
break;
case oLogLevel:
- intptr = (int *) &options->log_level;
+ log_level_ptr = &options->log_level;
arg = strdelim(&s);
value = log_level_number(arg);
- if (value == (LogLevel) - 1)
+ if (value == SYSLOG_LEVEL_NOT_SET)
fatal("%.200s line %d: unsupported log level '%s'",
- filename, linenum, arg ? arg : "<NONE>");
- if (*activep && (LogLevel) * intptr == -1)
- *intptr = (LogLevel) value;
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
+ *log_level_ptr = (LogLevel) value;
break;
case oLocalForward:
case oRemoteForward:
+ case oDynamicForward:
arg = strdelim(&s);
- if (!arg || *arg == '\0')
+ if (arg == NULL || *arg == '\0')
fatal("%.200s line %d: Missing port argument.",
filename, linenum);
- if ((fwd_port = a2port(arg)) == 0)
- fatal("%.200s line %d: Bad listen port.",
- filename, linenum);
- arg = strdelim(&s);
- if (!arg || *arg == '\0')
- fatal("%.200s line %d: Missing second argument.",
- filename, linenum);
- if (sscanf(arg, "%255[^:]:%5[0-9]", buf, sfwd_host_port) != 2 &&
- sscanf(arg, "%255[^/]/%5[0-9]", buf, sfwd_host_port) != 2)
+
+ if (opcode == oLocalForward ||
+ opcode == oRemoteForward) {
+ arg2 = strdelim(&s);
+ if (arg2 == NULL || *arg2 == '\0')
+ fatal("%.200s line %d: Missing target argument.",
+ filename, linenum);
+
+ /* construct a string for parse_forward */
+ snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
+ } else if (opcode == oDynamicForward) {
+ strlcpy(fwdarg, arg, sizeof(fwdarg));
+ }
+
+ if (parse_forward(&fwd, fwdarg,
+ opcode == oDynamicForward ? 1 : 0,
+ opcode == oRemoteForward ? 1 : 0) == 0)
fatal("%.200s line %d: Bad forwarding specification.",
filename, linenum);
- if ((fwd_host_port = a2port(sfwd_host_port)) == 0)
- fatal("%.200s line %d: Bad forwarding port.",
- filename, linenum);
+
if (*activep) {
- if (opcode == oLocalForward)
- add_local_forward(options, fwd_port, buf,
- fwd_host_port);
+ if (opcode == oLocalForward ||
+ opcode == oDynamicForward)
+ add_local_forward(options, &fwd);
else if (opcode == oRemoteForward)
- add_remote_forward(options, fwd_port, buf,
- fwd_host_port);
+ add_remote_forward(options, &fwd);
}
break;
- case oDynamicForward:
- arg = strdelim(&s);
- if (!arg || *arg == '\0')
- fatal("%.200s line %d: Missing port argument.",
- filename, linenum);
- fwd_port = a2port(arg);
- if (fwd_port == 0)
- fatal("%.200s line %d: Badly formatted port number.",
- filename, linenum);
- if (*activep)
- add_local_forward(options, fwd_port, "socks4", 0);
- break;
-
case oClearAllForwardings:
intptr = &options->clear_forwardings;
goto parse_flag;
value = SSH_ESCAPECHAR_NONE;
else {
fatal("%.200s line %d: Bad escape character.",
- filename, linenum);
+ filename, linenum);
/* NOTREACHED */
value = 0; /* Avoid compiler warning. */
}
*intptr = value;
break;
+ case oAddressFamily:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing address family.",
+ filename, linenum);
+ intptr = &options->address_family;
+ 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("Unsupported AddressFamily \"%s\"", arg);
+ if (*activep && *intptr == -1)
+ *intptr = value;
+ break;
+
+ case oEnableSSHKeysign:
+ intptr = &options->enable_ssh_keysign;
+ goto parse_flag;
+
+ case oIdentitiesOnly:
+ intptr = &options->identities_only;
+ goto parse_flag;
+
+ case oServerAliveInterval:
+ intptr = &options->server_alive_interval;
+ goto parse_time;
+
+ case oServerAliveCountMax:
+ intptr = &options->server_alive_count_max;
+ goto parse_int;
+
+ case oSendEnv:
+ while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
+ if (strchr(arg, '=') != NULL)
+ fatal("%s line %d: Invalid environment name.",
+ filename, linenum);
+ if (!*activep)
+ continue;
+ if (options->num_send_env >= MAX_SEND_ENV)
+ fatal("%s line %d: too many send env.",
+ filename, linenum);
+ options->send_env[options->num_send_env++] =
+ xstrdup(arg);
+ }
+ break;
+
+ case oControlPath:
+ charptr = &options->control_path;
+ goto parse_string;
+
+ case oControlMaster:
+ intptr = &options->control_master;
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing ControlMaster argument.",
+ filename, linenum);
+ value = 0; /* To avoid compiler warning... */
+ if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
+ value = SSHCTL_MASTER_YES;
+ else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
+ value = SSHCTL_MASTER_NO;
+ else if (strcmp(arg, "auto") == 0)
+ value = SSHCTL_MASTER_AUTO;
+ else if (strcmp(arg, "ask") == 0)
+ value = SSHCTL_MASTER_ASK;
+ else if (strcmp(arg, "autoask") == 0)
+ value = SSHCTL_MASTER_AUTO_ASK;
+ else
+ fatal("%.200s line %d: Bad ControlMaster argument.",
+ filename, linenum);
+ if (*activep && *intptr == -1)
+ *intptr = value;
+ break;
+
+ case oHashKnownHosts:
+ intptr = &options->hash_known_hosts;
+ goto parse_flag;
+
+ case oTunnel:
+ intptr = &options->tun_open;
+ arg = strdelim(&s);
+ 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_DEFAULT;
+ 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 (*activep)
+ *intptr = value;
+ break;
+
+ case oTunnelDevice:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ value = a2tun(arg, &value2);
+ if (value == SSH_TUNID_ERR)
+ fatal("%.200s line %d: Bad tun device.", filename, linenum);
+ if (*activep) {
+ options->tun_local = value;
+ options->tun_remote = value2;
+ }
+ break;
+
+ case oLocalCommand:
+ charptr = &options->local_command;
+ goto parse_command;
+
+ case oPermitLocalCommand:
+ intptr = &options->permit_local_command;
+ goto parse_flag;
+
+ case oVisualHostKey:
+ intptr = &options->visual_host_key;
+ goto parse_flag;
+
+ case oUseRoaming:
+ intptr = &options->use_roaming;
+ goto parse_flag;
+
+ case oDeprecated:
+ debug("%s line %d: Deprecated option \"%s\"",
+ filename, linenum, keyword);
+ return 0;
+
+ case oUnsupported:
+ error("%s line %d: Unsupported option \"%s\"",
+ filename, linenum, keyword);
+ return 0;
+
default:
fatal("process_config_line: Unimplemented opcode %d", opcode);
}
/* Check that there is no garbage at end of line. */
if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
- filename, linenum, arg);
+ filename, linenum, arg);
}
return 0;
}
*/
int
-read_config_file(const char *filename, const char *host, Options *options)
+read_config_file(const char *filename, const char *host, Options *options,
+ int checkperm)
{
FILE *f;
char line[1024];
int active, linenum;
int bad_options = 0;
- /* Open the file. */
- f = fopen(filename, "r");
- if (!f)
+ if ((f = fopen(filename, "r")) == NULL)
return 0;
+ if (checkperm) {
+ struct stat sb;
+
+ if (fstat(fileno(f), &sb) == -1)
+ fatal("fstat %s: %s", filename, strerror(errno));
+ if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
+ (sb.st_mode & 022) != 0))
+ fatal("Bad owner or permissions on %s", filename);
+ }
+
debug("Reading configuration data %.200s", filename);
/*
fclose(f);
if (bad_options > 0)
fatal("%s: terminating, %d bad configuration options",
- filename, bad_options);
+ filename, bad_options);
return 1;
}
memset(options, 'X', sizeof(*options));
options->forward_agent = -1;
options->forward_x11 = -1;
+ options->forward_x11_trusted = -1;
+ options->exit_on_forward_failure = -1;
options->xauth_location = NULL;
options->gateway_ports = -1;
options->use_privileged_port = -1;
- options->rhosts_authentication = -1;
options->rsa_authentication = -1;
options->pubkey_authentication = -1;
options->challenge_response_authentication = -1;
-#if defined(KRB4) || defined(KRB5)
- options->kerberos_authentication = -1;
-#endif
-#if defined(AFS) || defined(KRB5)
- options->kerberos_tgt_passing = -1;
-#endif
-#ifdef AFS
- options->afs_token_passing = -1;
-#endif
+ options->gss_authentication = -1;
+ options->gss_deleg_creds = -1;
options->password_authentication = -1;
options->kbd_interactive_authentication = -1;
options->kbd_interactive_devices = NULL;
options->rhosts_rsa_authentication = -1;
options->hostbased_authentication = -1;
- options->fallback_to_rsh = -1;
- options->use_rsh = -1;
options->batch_mode = -1;
options->check_host_ip = -1;
options->strict_host_key_checking = -1;
options->compression = -1;
- options->keepalives = -1;
+ options->tcp_keep_alive = -1;
options->compression_level = -1;
options->port = -1;
+ options->address_family = -1;
options->connection_attempts = -1;
+ options->connection_timeout = -1;
options->number_of_password_prompts = -1;
options->cipher = -1;
options->ciphers = NULL;
options->num_local_forwards = 0;
options->num_remote_forwards = 0;
options->clear_forwardings = -1;
- options->log_level = (LogLevel) - 1;
+ options->log_level = SYSLOG_LEVEL_NOT_SET;
options->preferred_authentications = NULL;
options->bind_address = NULL;
options->smartcard_device = NULL;
+ options->enable_ssh_keysign = - 1;
+ options->no_host_authentication_for_localhost = - 1;
+ options->identities_only = - 1;
+ options->rekey_limit = - 1;
+ options->verify_host_key_dns = -1;
+ options->server_alive_interval = -1;
+ options->server_alive_count_max = -1;
+ options->num_send_env = 0;
+ options->control_path = NULL;
+ options->control_master = -1;
+ options->hash_known_hosts = -1;
+ options->tun_open = -1;
+ options->tun_local = -1;
+ options->tun_remote = -1;
+ options->local_command = NULL;
+ options->permit_local_command = -1;
+ options->use_roaming = -1;
+ options->visual_host_key = -1;
+ options->zero_knowledge_password_authentication = -1;
}
/*
options->forward_agent = 0;
if (options->forward_x11 == -1)
options->forward_x11 = 0;
-#ifdef _PATH_XAUTH
+ if (options->forward_x11_trusted == -1)
+ options->forward_x11_trusted = 0;
+ if (options->exit_on_forward_failure == -1)
+ options->exit_on_forward_failure = 0;
if (options->xauth_location == NULL)
options->xauth_location = _PATH_XAUTH;
-#endif
if (options->gateway_ports == -1)
options->gateway_ports = 0;
if (options->use_privileged_port == -1)
options->use_privileged_port = 0;
- if (options->rhosts_authentication == -1)
- options->rhosts_authentication = 1;
if (options->rsa_authentication == -1)
options->rsa_authentication = 1;
if (options->pubkey_authentication == -1)
options->pubkey_authentication = 1;
if (options->challenge_response_authentication == -1)
options->challenge_response_authentication = 1;
-#if defined(KRB4) || defined(KRB5)
- if (options->kerberos_authentication == -1)
- options->kerberos_authentication = 1;
-#endif
-#if defined(AFS) || defined(KRB5)
- if (options->kerberos_tgt_passing == -1)
- options->kerberos_tgt_passing = 1;
-#endif
-#ifdef AFS
- if (options->afs_token_passing == -1)
- options->afs_token_passing = 1;
-#endif
+ if (options->gss_authentication == -1)
+ options->gss_authentication = 0;
+ if (options->gss_deleg_creds == -1)
+ options->gss_deleg_creds = 0;
if (options->password_authentication == -1)
options->password_authentication = 1;
if (options->kbd_interactive_authentication == -1)
options->kbd_interactive_authentication = 1;
if (options->rhosts_rsa_authentication == -1)
- options->rhosts_rsa_authentication = 1;
+ options->rhosts_rsa_authentication = 0;
if (options->hostbased_authentication == -1)
options->hostbased_authentication = 0;
- if (options->fallback_to_rsh == -1)
- options->fallback_to_rsh = 0;
- if (options->use_rsh == -1)
- options->use_rsh = 0;
if (options->batch_mode == -1)
options->batch_mode = 0;
if (options->check_host_ip == -1)
options->strict_host_key_checking = 2; /* 2 is default */
if (options->compression == -1)
options->compression = 0;
- if (options->keepalives == -1)
- options->keepalives = 1;
+ if (options->tcp_keep_alive == -1)
+ options->tcp_keep_alive = 1;
if (options->compression_level == -1)
options->compression_level = 6;
if (options->port == -1)
options->port = 0; /* Filled in ssh_connect. */
+ if (options->address_family == -1)
+ options->address_family = AF_UNSPEC;
if (options->connection_attempts == -1)
options->connection_attempts = 1;
if (options->number_of_password_prompts == -1)
/* options->macs, default set in myproposals.h */
/* options->hostkeyalgorithms, default set in myproposals.h */
if (options->protocol == SSH_PROTO_UNKNOWN)
- options->protocol = SSH_PROTO_1|SSH_PROTO_2;
+ options->protocol = SSH_PROTO_2;
if (options->num_identity_files == 0) {
if (options->protocol & SSH_PROTO_1) {
len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
if (options->user_hostfile2 == NULL)
options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
- if (options->log_level == (LogLevel) - 1)
+ if (options->log_level == SYSLOG_LEVEL_NOT_SET)
options->log_level = SYSLOG_LEVEL_INFO;
if (options->clear_forwardings == 1)
clear_forwardings(options);
+ if (options->no_host_authentication_for_localhost == - 1)
+ options->no_host_authentication_for_localhost = 0;
+ if (options->identities_only == -1)
+ options->identities_only = 0;
+ if (options->enable_ssh_keysign == -1)
+ options->enable_ssh_keysign = 0;
+ if (options->rekey_limit == -1)
+ options->rekey_limit = 0;
+ if (options->verify_host_key_dns == -1)
+ options->verify_host_key_dns = 0;
+ if (options->server_alive_interval == -1)
+ options->server_alive_interval = 0;
+ if (options->server_alive_count_max == -1)
+ options->server_alive_count_max = 3;
+ if (options->control_master == -1)
+ options->control_master = 0;
+ if (options->hash_known_hosts == -1)
+ options->hash_known_hosts = 0;
+ if (options->tun_open == -1)
+ options->tun_open = SSH_TUNMODE_NO;
+ if (options->tun_local == -1)
+ options->tun_local = SSH_TUNID_ANY;
+ if (options->tun_remote == -1)
+ options->tun_remote = SSH_TUNID_ANY;
+ if (options->permit_local_command == -1)
+ options->permit_local_command = 0;
+ if (options->use_roaming == -1)
+ options->use_roaming = 1;
+ if (options->visual_host_key == -1)
+ options->visual_host_key = 0;
+ if (options->zero_knowledge_password_authentication == -1)
+ options->zero_knowledge_password_authentication = 0;
+ /* options->local_command should not be set by default */
/* options->proxy_command should not be set by default */
/* options->user will be set in the main program if appropriate */
/* options->hostname will be set in the main program if appropriate */
/* options->host_key_alias should not be set by default */
/* options->preferred_authentications will be set in ssh */
}
+
+/*
+ * parse_forward
+ * parses a string containing a port forwarding specification of the form:
+ * dynamicfwd == 0
+ * [listenhost:]listenport:connecthost:connectport
+ * dynamicfwd == 1
+ * [listenhost:]listenport
+ * returns number of arguments parsed or zero on error
+ */
+int
+parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
+{
+ int i;
+ char *p, *cp, *fwdarg[4];
+
+ memset(fwd, '\0', sizeof(*fwd));
+
+ cp = p = xstrdup(fwdspec);
+
+ /* skip leading spaces */
+ while (isspace(*cp))
+ cp++;
+
+ for (i = 0; i < 4; ++i)
+ if ((fwdarg[i] = hpdelim(&cp)) == NULL)
+ break;
+
+ /* Check for trailing garbage */
+ if (cp != NULL)
+ i = 0; /* failure */
+
+ switch (i) {
+ case 1:
+ fwd->listen_host = NULL;
+ fwd->listen_port = a2port(fwdarg[0]);
+ fwd->connect_host = xstrdup("socks");
+ break;
+
+ case 2:
+ fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
+ fwd->listen_port = a2port(fwdarg[1]);
+ fwd->connect_host = xstrdup("socks");
+ break;
+
+ case 3:
+ fwd->listen_host = NULL;
+ fwd->listen_port = a2port(fwdarg[0]);
+ fwd->connect_host = xstrdup(cleanhostname(fwdarg[1]));
+ fwd->connect_port = a2port(fwdarg[2]);
+ break;
+
+ case 4:
+ fwd->listen_host = xstrdup(cleanhostname(fwdarg[0]));
+ fwd->listen_port = a2port(fwdarg[1]);
+ fwd->connect_host = xstrdup(cleanhostname(fwdarg[2]));
+ fwd->connect_port = a2port(fwdarg[3]);
+ break;
+ default:
+ i = 0; /* failure */
+ }
+
+ xfree(p);
+
+ if (dynamicfwd) {
+ if (!(i == 1 || i == 2))
+ goto fail_free;
+ } else {
+ if (!(i == 3 || i == 4))
+ goto fail_free;
+ if (fwd->connect_port <= 0)
+ goto fail_free;
+ }
+
+ if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0))
+ goto fail_free;
+
+ if (fwd->connect_host != NULL &&
+ strlen(fwd->connect_host) >= NI_MAXHOST)
+ goto fail_free;
+ if (fwd->listen_host != NULL &&
+ strlen(fwd->listen_host) >= NI_MAXHOST)
+ goto fail_free;
+
+
+ return (i);
+
+ fail_free:
+ if (fwd->connect_host != NULL) {
+ xfree(fwd->connect_host);
+ fwd->connect_host = NULL;
+ }
+ if (fwd->listen_host != NULL) {
+ xfree(fwd->listen_host);
+ fwd->listen_host = NULL;
+ }
+ return (0);
+}
andersk / openssh.git / blobdiff