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freebsd/crypto/openssh/readconf.c

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/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
* Functions for reading the configuration files.
*
* 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".
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*/
#include "includes.h"
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RCSID("$OpenBSD: readconf.c,v 1.95 2002/02/04 12:15:25 markus Exp $");
RCSID("$FreeBSD$");
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#include "ssh.h"
#include "xmalloc.h"
#include "compat.h"
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#include "cipher.h"
#include "pathnames.h"
#include "log.h"
#include "readconf.h"
#include "match.h"
#include "misc.h"
#include "kex.h"
#include "mac.h"
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/* Format of the configuration file:
# Configuration data is parsed as follows:
# 1. command line options
# 2. user-specific file
# 3. system-wide file
# Any configuration value is only changed the first time it is set.
# Thus, host-specific definitions should be at the beginning of the
# configuration file, and defaults at the end.
# Host-specific declarations. These may override anything above. A single
# host may match multiple declarations; these are processed in the order
# that they are given in.
Host *.ngs.fi ngs.fi
FallBackToRsh no
Host fake.com
HostName another.host.name.real.org
User blaah
Port 34289
ForwardX11 no
ForwardAgent no
Host books.com
RemoteForward 9999 shadows.cs.hut.fi:9999
Cipher 3des
Host fascist.blob.com
Port 23123
User tylonen
RhostsAuthentication no
PasswordAuthentication no
Host puukko.hut.fi
User t35124p
ProxyCommand ssh-proxy %h %p
Host *.fr
UseRsh yes
Host *.su
Cipher none
PasswordAuthentication no
# Defaults for various options
Host *
ForwardAgent no
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ForwardX11 no
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RhostsAuthentication yes
PasswordAuthentication yes
RSAAuthentication yes
RhostsRSAAuthentication yes
FallBackToRsh no
UseRsh no
StrictHostKeyChecking yes
KeepAlives no
IdentityFile ~/.ssh/identity
Port 22
EscapeChar ~
*/
/* Keyword tokens. */
typedef enum {
oBadOption,
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
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oChallengeResponseAuthentication, oXAuthLocation,
#if defined(KRB4) || defined(KRB5)
oKerberosAuthentication,
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#endif
#if defined(AFS) || defined(KRB5)
oKerberosTgtPassing,
#endif
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#ifdef AFS
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oAFSTokenPassing,
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#endif
oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
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oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts,
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
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oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
oClearAllForwardings, oNoHostAuthenticationForLocalhost
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} OpCodes;
/* Textual representations of the tokens. */
static struct {
const char *name;
OpCodes opcode;
} keywords[] = {
{ "forwardagent", oForwardAgent },
{ "forwardx11", oForwardX11 },
{ "xauthlocation", oXAuthLocation },
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{ "gatewayports", oGatewayPorts },
{ "useprivilegedport", oUsePrivilegedPort },
{ "rhostsauthentication", oRhostsAuthentication },
{ "passwordauthentication", oPasswordAuthentication },
{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
{ "kbdinteractivedevices", oKbdInteractiveDevices },
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{ "rsaauthentication", oRSAAuthentication },
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{ "pubkeyauthentication", oPubkeyAuthentication },
{ "dsaauthentication", oPubkeyAuthentication }, /* alias */
{ "rhostsrsaauthentication", oRhostsRSAAuthentication },
{ "hostbasedauthentication", oHostbasedAuthentication },
{ "challengeresponseauthentication", oChallengeResponseAuthentication },
{ "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
{ "tisauthentication", oChallengeResponseAuthentication }, /* alias */
#if defined(KRB4) || defined(KRB5)
{ "kerberosauthentication", oKerberosAuthentication },
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#endif
#if defined(AFS) || defined(KRB5)
{ "kerberostgtpassing", oKerberosTgtPassing },
#endif
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#ifdef AFS
{ "afstokenpassing", oAFSTokenPassing },
#endif
{ "fallbacktorsh", oFallBackToRsh },
{ "usersh", oUseRsh },
{ "identityfile", oIdentityFile },
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{ "identityfile2", oIdentityFile }, /* alias */
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{ "hostname", oHostName },
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{ "hostkeyalias", oHostKeyAlias },
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{ "proxycommand", oProxyCommand },
{ "port", oPort },
{ "cipher", oCipher },
{ "ciphers", oCiphers },
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{ "macs", oMacs },
{ "protocol", oProtocol },
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{ "remoteforward", oRemoteForward },
{ "localforward", oLocalForward },
{ "user", oUser },
{ "host", oHost },
{ "escapechar", oEscapeChar },
{ "globalknownhostsfile", oGlobalKnownHostsFile },
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{ "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */
{ "globalknownhostsfile2", oGlobalKnownHostsFile2 },
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{ "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
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{ "connectionattempts", oConnectionAttempts },
{ "batchmode", oBatchMode },
{ "checkhostip", oCheckHostIP },
{ "stricthostkeychecking", oStrictHostKeyChecking },
{ "compression", oCompression },
{ "compressionlevel", oCompressionLevel },
{ "keepalive", oKeepAlives },
{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
{ "loglevel", oLogLevel },
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{ "dynamicforward", oDynamicForward },
{ "preferredauthentications", oPreferredAuthentications },
{ "hostkeyalgorithms", oHostKeyAlgorithms },
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{ "bindaddress", oBindAddress },
{ "smartcarddevice", oSmartcardDevice },
{ "clearallforwardings", oClearAllForwardings },
{ "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
{ NULL, oBadOption }
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};
/*
* Adds a local TCP/IP port forward to options. Never returns if there is an
* error.
*/
void
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add_local_forward(Options *options, u_short port, const char *host,
u_short host_port)
{
Forward *fwd;
extern uid_t original_real_uid;
if (port < IPPORT_RESERVED && original_real_uid != 0)
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fatal("Privileged ports can only be forwarded by root.");
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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;
}
/*
* Adds a remote TCP/IP port forward to options. Never returns if there is
* an error.
*/
void
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add_remote_forward(Options *options, u_short port, const char *host,
u_short host_port)
{
Forward *fwd;
if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
fatal("Too many remote forwards (max %d).",
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SSH_MAX_FORWARDS_PER_DIRECTION);
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fwd = &options->remote_forwards[options->num_remote_forwards++];
fwd->port = port;
fwd->host = xstrdup(host);
fwd->host_port = host_port;
}
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static void
clear_forwardings(Options *options)
{
int i;
for (i = 0; i < options->num_local_forwards; i++)
xfree(options->local_forwards[i].host);
options->num_local_forwards = 0;
for (i = 0; i < options->num_remote_forwards; i++)
xfree(options->remote_forwards[i].host);
options->num_remote_forwards = 0;
}
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/*
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* Returns the number of the token pointed to by cp or oBadOption.
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*/
static OpCodes
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parse_token(const char *cp, const char *filename, int linenum)
{
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u_int i;
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for (i = 0; keywords[i].name; i++)
if (strcasecmp(cp, keywords[i].name) == 0)
return keywords[i].opcode;
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error("%s: line %d: Bad configuration option: %s",
filename, linenum, cp);
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return oBadOption;
}
/*
* Processes a single option line as used in the configuration files. This
* only sets those values that have not already been set.
*/
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;
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int opcode, *intptr, value;
u_short fwd_port, fwd_host_port;
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char sfwd_host_port[6];
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s = line;
/* Get the keyword. (Each line is supposed to begin with a keyword). */
keyword = strdelim(&s);
/* Ignore leading whitespace. */
if (*keyword == '\0')
keyword = strdelim(&s);
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if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
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return 0;
opcode = parse_token(keyword, filename, linenum);
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switch (opcode) {
case oBadOption:
/* don't panic, but count bad options */
return -1;
/* NOTREACHED */
case oForwardAgent:
intptr = &options->forward_agent;
parse_flag:
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
value = 0; /* To avoid compiler warning... */
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
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value = 1;
else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
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value = 0;
else
fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
if (*activep && *intptr == -1)
*intptr = value;
break;
case oForwardX11:
intptr = &options->forward_x11;
goto parse_flag;
case oGatewayPorts:
intptr = &options->gateway_ports;
goto parse_flag;
case oUsePrivilegedPort:
intptr = &options->use_privileged_port;
goto parse_flag;
case oRhostsAuthentication:
intptr = &options->rhosts_authentication;
goto parse_flag;
case oPasswordAuthentication:
intptr = &options->password_authentication;
goto parse_flag;
case oKbdInteractiveAuthentication:
intptr = &options->kbd_interactive_authentication;
goto parse_flag;
case oKbdInteractiveDevices:
charptr = &options->kbd_interactive_devices;
goto parse_string;
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case oPubkeyAuthentication:
intptr = &options->pubkey_authentication;
goto parse_flag;
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case oRSAAuthentication:
intptr = &options->rsa_authentication;
goto parse_flag;
case oRhostsRSAAuthentication:
intptr = &options->rhosts_rsa_authentication;
goto parse_flag;
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case oHostbasedAuthentication:
intptr = &options->hostbased_authentication;
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goto parse_flag;
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case oChallengeResponseAuthentication:
intptr = &options->challenge_response_authentication;
goto parse_flag;
#if defined(KRB4) || defined(KRB5)
case oKerberosAuthentication:
intptr = &options->kerberos_authentication;
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goto parse_flag;
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#endif
#if defined(AFS) || defined(KRB5)
case oKerberosTgtPassing:
intptr = &options->kerberos_tgt_passing;
goto parse_flag;
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#endif
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#ifdef AFS
case oAFSTokenPassing:
intptr = &options->afs_token_passing;
goto parse_flag;
#endif
case oFallBackToRsh:
intptr = &options->fallback_to_rsh;
goto parse_flag;
case oUseRsh:
intptr = &options->use_rsh;
goto parse_flag;
case oBatchMode:
intptr = &options->batch_mode;
goto parse_flag;
case oCheckHostIP:
intptr = &options->check_host_ip;
goto parse_flag;
case oStrictHostKeyChecking:
intptr = &options->strict_host_key_checking;
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing yes/no/ask argument.",
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filename, linenum);
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value = 0; /* To avoid compiler warning... */
if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
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value = 1;
else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
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value = 0;
else if (strcmp(arg, "ask") == 0)
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value = 2;
else
fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
if (*activep && *intptr == -1)
*intptr = value;
break;
case oCompression:
intptr = &options->compression;
goto parse_flag;
case oKeepAlives:
intptr = &options->keepalives;
goto parse_flag;
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case oNoHostAuthenticationForLocalhost:
intptr = &options->no_host_authentication_for_localhost;
goto parse_flag;
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case oNumberOfPasswordPrompts:
intptr = &options->number_of_password_prompts;
goto parse_int;
case oCompressionLevel:
intptr = &options->compression_level;
goto parse_int;
case oIdentityFile:
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing argument.", filename, linenum);
if (*activep) {
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intptr = &options->num_identity_files;
if (*intptr >= SSH_MAX_IDENTITY_FILES)
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fatal("%.200s line %d: Too many identity files specified (max %d).",
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filename, linenum, SSH_MAX_IDENTITY_FILES);
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charptr = &options->identity_files[*intptr];
*charptr = xstrdup(arg);
*intptr = *intptr + 1;
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}
break;
case oXAuthLocation:
charptr=&options->xauth_location;
goto parse_string;
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case oUser:
charptr = &options->user;
parse_string:
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing argument.", filename, linenum);
if (*activep && *charptr == NULL)
*charptr = xstrdup(arg);
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break;
case oGlobalKnownHostsFile:
charptr = &options->system_hostfile;
goto parse_string;
case oUserKnownHostsFile:
charptr = &options->user_hostfile;
goto parse_string;
case oGlobalKnownHostsFile2:
charptr = &options->system_hostfile2;
goto parse_string;
case oUserKnownHostsFile2:
charptr = &options->user_hostfile2;
goto parse_string;
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case oHostName:
charptr = &options->hostname;
goto parse_string;
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case oHostKeyAlias:
charptr = &options->host_key_alias;
goto parse_string;
case oPreferredAuthentications:
charptr = &options->preferred_authentications;
goto parse_string;
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case oBindAddress:
charptr = &options->bind_address;
goto parse_string;
case oSmartcardDevice:
charptr = &options->smartcard_device;
goto parse_string;
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case oProxyCommand:
charptr = &options->proxy_command;
string = xstrdup("");
while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
string = xrealloc(string, strlen(string) + strlen(arg) + 2);
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strcat(string, " ");
strcat(string, arg);
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}
if (*activep && *charptr == NULL)
*charptr = string;
else
xfree(string);
return 0;
case oPort:
intptr = &options->port;
parse_int:
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing argument.", filename, linenum);
if (arg[0] < '0' || arg[0] > '9')
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fatal("%.200s line %d: Bad number.", filename, linenum);
/* Octal, decimal, or hex format? */
value = strtol(arg, &endofnumber, 0);
if (arg == endofnumber)
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fatal("%.200s line %d: Bad number.", filename, linenum);
if (*activep && *intptr == -1)
*intptr = value;
break;
case oConnectionAttempts:
intptr = &options->connection_attempts;
goto parse_int;
case oCipher:
intptr = &options->cipher;
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
value = cipher_number(arg);
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if (value == -1)
fatal("%.200s line %d: Bad cipher '%s'.",
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filename, linenum, arg ? arg : "<NONE>");
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if (*activep && *intptr == -1)
*intptr = value;
break;
case oCiphers:
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!ciphers_valid(arg))
fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
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filename, linenum, arg ? arg : "<NONE>");
if (*activep && options->ciphers == NULL)
options->ciphers = xstrdup(arg);
break;
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case oMacs:
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!mac_valid(arg))
fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
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filename, linenum, arg ? arg : "<NONE>");
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if (*activep && options->macs == NULL)
options->macs = xstrdup(arg);
break;
case oHostKeyAlgorithms:
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (!key_names_valid2(arg))
fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
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filename, linenum, arg ? arg : "<NONE>");
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if (*activep && options->hostkeyalgorithms == NULL)
options->hostkeyalgorithms = xstrdup(arg);
break;
case oProtocol:
intptr = &options->protocol;
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
value = proto_spec(arg);
if (value == SSH_PROTO_UNKNOWN)
fatal("%.200s line %d: Bad protocol spec '%s'.",
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filename, linenum, arg ? arg : "<NONE>");
if (*activep && *intptr == SSH_PROTO_UNKNOWN)
*intptr = value;
break;
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case oLogLevel:
intptr = (int *) &options->log_level;
arg = strdelim(&s);
value = log_level_number(arg);
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if (value == SYSLOG_LEVEL_NOT_SET)
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fatal("%.200s line %d: unsupported log level '%s'",
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filename, linenum, arg ? arg : "<NONE>");
if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET)
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*intptr = (LogLevel) value;
break;
case oLocalForward:
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case oRemoteForward:
arg = strdelim(&s);
if (!arg || *arg == '\0')
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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')
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fatal("%.200s line %d: Missing second argument.",
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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)
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);
else if (opcode == oRemoteForward)
add_remote_forward(options, fwd_port, buf,
fwd_host_port);
}
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break;
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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);
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if (*activep)
add_local_forward(options, fwd_port, "socks4", 0);
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break;
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case oClearAllForwardings:
intptr = &options->clear_forwardings;
goto parse_flag;
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case oHost:
*activep = 0;
while ((arg = strdelim(&s)) != NULL && *arg != '\0')
if (match_pattern(host, arg)) {
debug("Applying options for %.100s", arg);
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*activep = 1;
break;
}
/* Avoid garbage check below, as strdelim is done. */
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return 0;
case oEscapeChar:
intptr = &options->escape_char;
arg = strdelim(&s);
if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing argument.", filename, linenum);
if (arg[0] == '^' && arg[2] == 0 &&
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(u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
value = (u_char) arg[1] & 31;
else if (strlen(arg) == 1)
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value = (u_char) arg[0];
else if (strcmp(arg, "none") == 0)
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value = SSH_ESCAPECHAR_NONE;
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else {
fatal("%.200s line %d: Bad escape character.",
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filename, linenum);
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/* NOTREACHED */
value = 0; /* Avoid compiler warning. */
}
if (*activep && *intptr == -1)
*intptr = value;
break;
default:
fatal("process_config_line: Unimplemented opcode %d", opcode);
}
/* Check that there is no garbage at end of line. */
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if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
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filename, linenum, arg);
}
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return 0;
}
/*
* Reads the config file and modifies the options accordingly. Options
* should already be initialized before this call. This never returns if
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* there is an error. If the file does not exist, this returns 0.
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*/
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int
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read_config_file(const char *filename, const char *host, Options *options)
{
FILE *f;
char line[1024];
int active, linenum;
int bad_options = 0;
/* Open the file. */
f = fopen(filename, "r");
if (!f)
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return 0;
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debug("Reading configuration data %.200s", filename);
/*
* Mark that we are now processing the options. This flag is turned
* on/off by Host specifications.
*/
active = 1;
linenum = 0;
while (fgets(line, sizeof(line), f)) {
/* Update line number counter. */
linenum++;
if (process_config_line(options, host, line, filename, linenum, &active) != 0)
bad_options++;
}
fclose(f);
if (bad_options > 0)
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fatal("%s: terminating, %d bad configuration options",
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filename, bad_options);
return 1;
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}
/*
* Initializes options to special values that indicate that they have not yet
* been set. Read_config_file will only set options with this value. Options
* are processed in the following order: command line, user config file,
* system config file. Last, fill_default_options is called.
*/
void
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initialize_options(Options * options)
{
memset(options, 'X', sizeof(*options));
options->forward_agent = -1;
options->forward_x11 = -1;
options->xauth_location = NULL;
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options->gateway_ports = -1;
options->use_privileged_port = -1;
options->rhosts_authentication = -1;
options->rsa_authentication = -1;
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options->pubkey_authentication = -1;
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options->challenge_response_authentication = -1;
#if defined(KRB4) || defined(KRB5)
options->kerberos_authentication = -1;
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#endif
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#if defined(AFS) || defined(KRB5)
options->kerberos_tgt_passing = -1;
#endif
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#ifdef AFS
options->afs_token_passing = -1;
#endif
options->password_authentication = -1;
options->kbd_interactive_authentication = -1;
options->kbd_interactive_devices = NULL;
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options->rhosts_rsa_authentication = -1;
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options->hostbased_authentication = -1;
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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->compression_level = -1;
options->port = -1;
options->connection_attempts = -1;
options->number_of_password_prompts = -1;
options->cipher = -1;
options->ciphers = NULL;
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options->macs = NULL;
options->hostkeyalgorithms = NULL;
options->protocol = SSH_PROTO_UNKNOWN;
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options->num_identity_files = 0;
options->hostname = NULL;
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options->host_key_alias = NULL;
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options->proxy_command = NULL;
options->user = NULL;
options->escape_char = -1;
options->system_hostfile = NULL;
options->user_hostfile = NULL;
options->system_hostfile2 = NULL;
options->user_hostfile2 = NULL;
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options->num_local_forwards = 0;
options->num_remote_forwards = 0;
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options->clear_forwardings = -1;
options->log_level = SYSLOG_LEVEL_NOT_SET;
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options->preferred_authentications = NULL;
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options->bind_address = NULL;
options->smartcard_device = NULL;
options->no_host_authentication_for_localhost = - 1;
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}
/*
* Called after processing other sources of option data, this fills those
* options for which no value has been specified with their default values.
*/
void
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fill_default_options(Options * options)
{
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int len;
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if (options->forward_agent == -1)
options->forward_agent = 0;
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if (options->forward_x11 == -1)
options->forward_x11 = 0;
if (options->xauth_location == NULL)
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options->xauth_location = _PATH_XAUTH;
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if (options->gateway_ports == -1)
options->gateway_ports = 0;
if (options->use_privileged_port == -1)
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options->use_privileged_port = 0;
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if (options->rhosts_authentication == -1)
options->rhosts_authentication = 1;
if (options->rsa_authentication == -1)
options->rsa_authentication = 1;
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if (options->pubkey_authentication == -1)
options->pubkey_authentication = 1;
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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;
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#endif
#if defined(AFS) || defined(KRB5)
if (options->kerberos_tgt_passing == -1)
options->kerberos_tgt_passing = 1;
#endif
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#ifdef AFS
if (options->afs_token_passing == -1)
options->afs_token_passing = 1;
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#endif
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if (options->password_authentication == -1)
options->password_authentication = 1;
if (options->kbd_interactive_authentication == -1)
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options->kbd_interactive_authentication = 1;
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if (options->rhosts_rsa_authentication == -1)
options->rhosts_rsa_authentication = 1;
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if (options->hostbased_authentication == -1)
options->hostbased_authentication = 0;
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if (options->fallback_to_rsh == -1)
options->fallback_to_rsh = 0;
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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->check_host_ip = 0;
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if (options->strict_host_key_checking == -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->compression_level == -1)
options->compression_level = 6;
if (options->port == -1)
options->port = 0; /* Filled in ssh_connect. */
if (options->connection_attempts == -1)
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options->connection_attempts = 1;
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if (options->number_of_password_prompts == -1)
options->number_of_password_prompts = 3;
/* Selected in ssh_login(). */
if (options->cipher == -1)
options->cipher = SSH_CIPHER_NOT_SET;
/* options->ciphers, default set in myproposals.h */
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/* options->macs, default set in myproposals.h */
/* options->hostkeyalgorithms, default set in myproposals.h */
if (options->protocol == SSH_PROTO_UNKNOWN)
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options->protocol = SSH_PROTO_1|SSH_PROTO_2;
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if (options->num_identity_files == 0) {
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if (options->protocol & SSH_PROTO_1) {
len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1;
options->identity_files[options->num_identity_files] =
xmalloc(len);
snprintf(options->identity_files[options->num_identity_files++],
len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
}
if (options->protocol & SSH_PROTO_2) {
len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1;
options->identity_files[options->num_identity_files] =
xmalloc(len);
snprintf(options->identity_files[options->num_identity_files++],
len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA);
len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1;
options->identity_files[options->num_identity_files] =
xmalloc(len);
snprintf(options->identity_files[options->num_identity_files++],
len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
}
}
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if (options->escape_char == -1)
options->escape_char = '~';
if (options->system_hostfile == NULL)
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options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
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if (options->user_hostfile == NULL)
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options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
if (options->system_hostfile2 == NULL)
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options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
if (options->user_hostfile2 == NULL)
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options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
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if (options->log_level == SYSLOG_LEVEL_NOT_SET)
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options->log_level = SYSLOG_LEVEL_INFO;
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if (options->clear_forwardings == 1)
clear_forwardings(options);
if (options->no_host_authentication_for_localhost == - 1)
options->no_host_authentication_for_localhost = 0;
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/* 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 */
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/* options->host_key_alias should not be set by default */
/* options->preferred_authentications will be set in ssh */
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}