+/* $OpenBSD: readconf.c,v 1.179 2009/10/28 16:38:18 reyk Exp $ */
/*
+ * 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".
+ */
-readconf.c
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
+#include "includes.h"
-Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
-Created: Sat Apr 22 00:03:10 1995 ylo
+#include <netinet/in.h>
-Functions for reading the configuration files.
-
-*/
-
-#include "includes.h"
-RCSID("$Id$");
+#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 "xmalloc.h"
+#include "match.h"
+#include "misc.h"
+#include "buffer.h"
+#include "kex.h"
+#include "mac.h"
/* Format of the configuration file:
# 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 yes
- RhostsAuthentication yes
+ ForwardX11 no
PasswordAuthentication yes
RSAAuthentication yes
RhostsRSAAuthentication yes
- FallBackToRsh no
- UseRsh no
StrictHostKeyChecking yes
- KeepAlives no
+ TcpKeepAlive no
IdentityFile ~/.ssh/identity
Port 22
EscapeChar ~
/* Keyword tokens. */
-typedef enum
-{
- oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
- oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
-#ifdef KRB4
- oKerberosAuthentication,
-#endif /* KRB4 */
-#ifdef AFS
- oKerberosTgtPassing, oAFSTokenPassing,
-#endif
- oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
- oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
- oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
- oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
- oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication,
- oUsePrivilegedPort, oLogLevel
+typedef enum {
+ oBadOption,
+ oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
+ oExitOnForwardFailure,
+ oPasswordAuthentication, oRSAAuthentication,
+ oChallengeResponseAuthentication, oXAuthLocation,
+ oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
+ oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
+ oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
+ oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
+ oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
+ oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
+ oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
+ oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
+ oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
+ oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
+ oClearAllForwardings, oNoHostAuthenticationForLocalhost,
+ oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
+ oAddressFamily, oGssAuthentication, oGssDelegateCreds,
+ oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
+ oSendEnv, oControlPath, oControlMaster, oHashKnownHosts,
+ oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
+ oVisualHostKey, oUseRoaming, oRDomain,
+ oZeroKnowledgePasswordAuthentication, oDeprecated, oUnsupported
} OpCodes;
/* Textual representations of the tokens. */
-static struct
-{
- const char *name;
- OpCodes opcode;
-} keywords[] =
-{
- { "forwardagent", oForwardAgent },
- { "forwardx11", oForwardX11 },
- { "gatewayports", oGatewayPorts },
- { "useprivilegedport", oUsePrivilegedPort },
- { "rhostsauthentication", oRhostsAuthentication },
- { "passwordauthentication", oPasswordAuthentication },
- { "rsaauthentication", oRSAAuthentication },
-#ifdef KRB4
- { "kerberosauthentication", oKerberosAuthentication },
-#endif /* KRB4 */
-#ifdef AFS
- { "kerberostgtpassing", oKerberosTgtPassing },
- { "afstokenpassing", oAFSTokenPassing },
+static struct {
+ const char *name;
+ OpCodes opcode;
+} keywords[] = {
+ { "forwardagent", oForwardAgent },
+ { "forwardx11", oForwardX11 },
+ { "forwardx11trusted", oForwardX11Trusted },
+ { "exitonforwardfailure", oExitOnForwardFailure },
+ { "xauthlocation", oXAuthLocation },
+ { "gatewayports", oGatewayPorts },
+ { "useprivilegedport", oUsePrivilegedPort },
+ { "rhostsauthentication", oDeprecated },
+ { "passwordauthentication", oPasswordAuthentication },
+ { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
+ { "kbdinteractivedevices", oKbdInteractiveDevices },
+ { "rsaauthentication", oRSAAuthentication },
+ { "pubkeyauthentication", oPubkeyAuthentication },
+ { "dsaauthentication", oPubkeyAuthentication }, /* alias */
+ { "rhostsrsaauthentication", oRhostsRSAAuthentication },
+ { "hostbasedauthentication", oHostbasedAuthentication },
+ { "challengeresponseauthentication", oChallengeResponseAuthentication },
+ { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
+ { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
+ { "kerberosauthentication", oUnsupported },
+ { "kerberostgtpassing", oUnsupported },
+ { "afstokenpassing", oUnsupported },
+#if defined(GSSAPI)
+ { "gssapiauthentication", oGssAuthentication },
+ { "gssapidelegatecredentials", oGssDelegateCreds },
+#else
+ { "gssapiauthentication", oUnsupported },
+ { "gssapidelegatecredentials", oUnsupported },
+#endif
+ { "fallbacktorsh", oDeprecated },
+ { "usersh", oDeprecated },
+ { "identityfile", oIdentityFile },
+ { "identityfile2", oIdentityFile }, /* obsolete */
+ { "identitiesonly", oIdentitiesOnly },
+ { "hostname", oHostName },
+ { "hostkeyalias", oHostKeyAlias },
+ { "proxycommand", oProxyCommand },
+ { "port", oPort },
+ { "cipher", oCipher },
+ { "ciphers", oCiphers },
+ { "macs", oMacs },
+ { "protocol", oProtocol },
+ { "remoteforward", oRemoteForward },
+ { "localforward", oLocalForward },
+ { "user", oUser },
+ { "host", oHost },
+ { "escapechar", oEscapeChar },
+ { "globalknownhostsfile", oGlobalKnownHostsFile },
+ { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */
+ { "userknownhostsfile", oUserKnownHostsFile },
+ { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */
+ { "connectionattempts", oConnectionAttempts },
+ { "batchmode", oBatchMode },
+ { "checkhostip", oCheckHostIP },
+ { "stricthostkeychecking", oStrictHostKeyChecking },
+ { "compression", oCompression },
+ { "compressionlevel", oCompressionLevel },
+ { "tcpkeepalive", oTCPKeepAlive },
+ { "keepalive", oTCPKeepAlive }, /* obsolete */
+ { "numberofpasswordprompts", oNumberOfPasswordPrompts },
+ { "loglevel", oLogLevel },
+ { "dynamicforward", oDynamicForward },
+ { "preferredauthentications", oPreferredAuthentications },
+ { "hostkeyalgorithms", oHostKeyAlgorithms },
+ { "bindaddress", oBindAddress },
+#ifdef SMARTCARD
+ { "smartcarddevice", oSmartcardDevice },
+#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 },
+ { "rdomain", oRDomain },
+#ifdef JPAKE
+ { "zeroknowledgepasswordauthentication",
+ oZeroKnowledgePasswordAuthentication },
+#else
+ { "zeroknowledgepasswordauthentication", oUnsupported },
#endif
- { "fallbacktorsh", oFallBackToRsh },
- { "usersh", oUseRsh },
- { "identityfile", oIdentityFile },
- { "hostname", oHostName },
- { "proxycommand", oProxyCommand },
- { "port", oPort },
- { "cipher", oCipher },
- { "remoteforward", oRemoteForward },
- { "localforward", oLocalForward },
- { "user", oUser },
- { "host", oHost },
- { "escapechar", oEscapeChar },
- { "rhostsrsaauthentication", oRhostsRSAAuthentication },
- { "globalknownhostsfile", oGlobalKnownHostsFile },
- { "userknownhostsfile", oUserKnownHostsFile },
- { "connectionattempts", oConnectionAttempts },
- { "batchmode", oBatchMode },
- { "checkhostip", oCheckHostIP },
- { "stricthostkeychecking", oStrictHostKeyChecking },
- { "compression", oCompression },
- { "compressionlevel", oCompressionLevel },
- { "keepalive", oKeepAlives },
- { "numberofpasswordprompts", oNumberOfPasswordPrompts },
- { "tisauthentication", oTISAuthentication },
- { "loglevel", oLogLevel },
- { NULL, 0 }
-};
-
-/* textual representation of log-levels */
-static struct
-{
- const char *name;
- LogLevel level;
-} log_levels[] =
-{
- { "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 }
+ { NULL, oBadOption }
};
-/* Characters considered whitespace in strtok calls. */
-#define WHITESPACE " \t\r\n"
+/*
+ * Adds a local TCP/IP port forward to options. Never returns if there is an
+ * error.
+ */
+void
+add_local_forward(Options *options, const Forward *newfwd)
+{
+ Forward *fwd;
+#ifndef NO_IPPORT_RESERVED_CONCEPT
+ extern uid_t original_real_uid;
+ 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->listen_host = newfwd->listen_host;
+ fwd->listen_port = newfwd->listen_port;
+ fwd->connect_host = newfwd->connect_host;
+ fwd->connect_port = newfwd->connect_port;
+}
-/* Adds a local TCP/IP port forward to options. Never returns if there
- is an error. */
+/*
+ * Adds a remote TCP/IP port forward to options. Never returns if there is
+ * an error.
+ */
-void add_local_forward(Options *options, int port, const char *host,
- int host_port)
+void
+add_remote_forward(Options *options, const Forward *newfwd)
{
- Forward *fwd;
- extern uid_t original_real_uid;
- if ((port & 0xffff) != port)
- fatal("Requested forwarding of nonexistent port %d.", port);
- if (port < IPPORT_RESERVED && original_real_uid != 0)
- fatal("Privileged ports can only be forwarded by root.\n");
- 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;
+ Forward *fwd;
+ if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
+ fatal("Too many remote forwards (max %d).",
+ SSH_MAX_FORWARDS_PER_DIRECTION);
+ fwd = &options->remote_forwards[options->num_remote_forwards++];
+
+ fwd->listen_host = newfwd->listen_host;
+ fwd->listen_port = newfwd->listen_port;
+ fwd->connect_host = newfwd->connect_host;
+ fwd->connect_port = newfwd->connect_port;
}
-/* Adds a remote TCP/IP port forward to options. Never returns if there
- is an error. */
-
-void add_remote_forward(Options *options, int port, const char *host,
- int host_port)
+static void
+clear_forwardings(Options *options)
{
- Forward *fwd;
- if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
- fatal("Too many remote forwards (max %d).",
- 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;
+ int i;
+
+ 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++) {
+ 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;
}
-/* Returns the number of the token pointed to by cp of length len.
- Never returns if the token is not known. */
+/*
+ * Returns the number of the token pointed to by cp or oBadOption.
+ */
-static OpCodes parse_token(const char *cp, const char *filename, int linenum)
+static OpCodes
+parse_token(const char *cp, const char *filename, int linenum)
{
- unsigned int i;
+ u_int i;
- for (i = 0; keywords[i].name; i++)
- if (strcmp(cp, keywords[i].name) == 0)
- return keywords[i].opcode;
+ for (i = 0; keywords[i].name; i++)
+ if (strcasecmp(cp, keywords[i].name) == 0)
+ return keywords[i].opcode;
- fatal("%.200s line %d: Bad configuration option.",
- filename, linenum);
- /*NOTREACHED*/
- return 0;
+ error("%s: line %d: Bad configuration option: %s",
+ filename, linenum, cp);
+ return oBadOption;
}
-/* Processes a single option line as used in the configuration files.
- This only sets those values that have not already been set. */
+/*
+ * 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"
-void process_config_line(Options *options, const char *host,
- char *line, const char *filename, int linenum,
- int *activep)
+int
+process_config_line(Options *options, const char *host,
+ char *line, const char *filename, int linenum,
+ int *activep)
{
- char buf[256], *cp, *string, **charptr;
- int opcode, *intptr, value, fwd_port, fwd_host_port, i;
-
- /* Skip leading whitespace. */
- cp = line + strspn(line, WHITESPACE);
- if (!*cp || *cp == '\n' || *cp == '#')
- return;
-
- /* Get the keyword. (Each line is supposed to begin with a keyword). */
- 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 oForwardAgent:
- intptr = &options->forward_agent;
- parse_flag:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
- value = 0; /* To avoid compiler warning... */
- if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
- value = 1;
- else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
- 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 oRSAAuthentication:
- intptr = &options->rsa_authentication;
- goto parse_flag;
-
- case oRhostsRSAAuthentication:
- intptr = &options->rhosts_rsa_authentication;
- goto parse_flag;
-
-#ifdef KRB4
- case oKerberosAuthentication:
- intptr = &options->kerberos_authentication;
- goto parse_flag;
-#endif /* KRB4 */
-
-#ifdef AFS
- case oKerberosTgtPassing:
- intptr = &options->kerberos_tgt_passing;
- goto parse_flag;
-
- 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;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing yes/no argument.",
- filename, linenum);
- value = 0; /* To avoid compiler warning... */
- if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
- value = 1;
- else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
- value = 0;
- else if (strcmp(cp, "ask") == 0)
- 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;
-
- case oNumberOfPasswordPrompts:
- intptr = &options->number_of_password_prompts;
- goto parse_int;
-
- case oTISAuthentication:
- cp = strtok(NULL, WHITESPACE);
- if (cp != 0 && (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0))
- fprintf(stderr,
- "%.99s line %d: Warning, TIS is not supported.\n",
- filename,
- linenum);
- break;
-
- case oCompressionLevel:
- intptr = &options->compression_level;
- goto parse_int;
-
- case oIdentityFile:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (*activep)
- {
- if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
- fatal("%.200s line %d: Too many identity files specified (max %d).",
- filename, linenum, SSH_MAX_IDENTITY_FILES);
- options->identity_files[options->num_identity_files++] = xstrdup(cp);
+ 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';
}
- break;
-
- case oUser:
- charptr = &options->user;
- parse_string:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (*activep && *charptr == NULL)
- *charptr = xstrdup(cp);
- break;
-
- case oGlobalKnownHostsFile:
- charptr = &options->system_hostfile;
- goto parse_string;
-
- case oUserKnownHostsFile:
- charptr = &options->user_hostfile;
- goto parse_string;
-
- case oHostName:
- charptr = &options->hostname;
- goto parse_string;
-
- case oProxyCommand:
- charptr = &options->proxy_command;
- string = xstrdup("");
- while ((cp = strtok(NULL, WHITESPACE)) != NULL)
- {
- string = xrealloc(string, strlen(string) + strlen(cp) + 2);
- strcat(string, " ");
- strcat(string, cp);
+
+ s = line;
+ /* Get the keyword. (Each line is supposed to begin with a keyword). */
+ if ((keyword = strdelim(&s)) == NULL)
+ return 0;
+ /* Ignore leading whitespace. */
+ if (*keyword == '\0')
+ keyword = strdelim(&s);
+ if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
+ return 0;
+
+ opcode = parse_token(keyword, filename, linenum);
+
+ switch (opcode) {
+ case oBadOption:
+ /* 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:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ 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)
+ value = 1;
+ else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
+ 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 oForwardX11Trusted:
+ intptr = &options->forward_x11_trusted;
+ goto parse_flag;
+
+ case oGatewayPorts:
+ intptr = &options->gateway_ports;
+ goto parse_flag;
+
+ case oExitOnForwardFailure:
+ intptr = &options->exit_on_forward_failure;
+ goto parse_flag;
+
+ 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 oKbdInteractiveDevices:
+ charptr = &options->kbd_interactive_devices;
+ goto parse_string;
+
+ case oPubkeyAuthentication:
+ intptr = &options->pubkey_authentication;
+ goto parse_flag;
+
+ case oRSAAuthentication:
+ intptr = &options->rsa_authentication;
+ goto parse_flag;
+
+ case oRhostsRSAAuthentication:
+ intptr = &options->rhosts_rsa_authentication;
+ goto parse_flag;
+
+ case oHostbasedAuthentication:
+ intptr = &options->hostbased_authentication;
+ goto parse_flag;
+
+ case oChallengeResponseAuthentication:
+ intptr = &options->challenge_response_authentication;
+ goto parse_flag;
+
+ case oGssAuthentication:
+ intptr = &options->gss_authentication;
+ goto parse_flag;
+
+ case oGssDelegateCreds:
+ intptr = &options->gss_deleg_creds;
+ goto parse_flag;
+
+ case oBatchMode:
+ intptr = &options->batch_mode;
+ goto parse_flag;
+
+ case oCheckHostIP:
+ 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);
+ value = 0; /* To avoid compiler warning... */
+ if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
+ value = 1;
+ else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
+ value = 0;
+ else if (strcmp(arg, "ask") == 0)
+ 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 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->number_of_password_prompts;
+ goto parse_int;
+
+ case oCompressionLevel:
+ 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')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (*activep) {
+ 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];
+ *charptr = xstrdup(arg);
+ *intptr = *intptr + 1;
+ }
+ break;
+
+ case oXAuthLocation:
+ charptr=&options->xauth_location;
+ goto parse_string;
+
+ case oUser:
+ charptr = &options->user;
+parse_string:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (*activep && *charptr == NULL)
+ *charptr = xstrdup(arg);
+ 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;
+
+ case oHostName:
+ charptr = &options->hostname;
+ goto parse_string;
+
+ case oHostKeyAlias:
+ charptr = &options->host_key_alias;
+ goto parse_string;
+
+ case oPreferredAuthentications:
+ charptr = &options->preferred_authentications;
+ goto parse_string;
+
+ case oBindAddress:
+ charptr = &options->bind_address;
+ goto parse_string;
+
+ case oSmartcardDevice:
+ charptr = &options->smartcard_device;
+ goto parse_string;
+
+ case oProxyCommand:
+ charptr = &options->proxy_command;
+parse_command:
+ if (s == NULL)
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ len = strspn(s, WHITESPACE "=");
+ if (*activep && *charptr == NULL)
+ *charptr = xstrdup(s + len);
+ return 0;
+
+ case oPort:
+ intptr = &options->port;
+parse_int:
+ 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);
+
+ /* Octal, decimal, or hex format? */
+ value = strtol(arg, &endofnumber, 0);
+ if (arg == endofnumber)
+ 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);
+ if (value == -1)
+ fatal("%.200s line %d: Bad cipher '%s'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ 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'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*activep && options->ciphers == NULL)
+ options->ciphers = xstrdup(arg);
+ break;
+
+ 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'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ 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'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ 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'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*activep && *intptr == SSH_PROTO_UNKNOWN)
+ *intptr = value;
+ break;
+
+ case oLogLevel:
+ log_level_ptr = &options->log_level;
+ arg = strdelim(&s);
+ value = log_level_number(arg);
+ if (value == SYSLOG_LEVEL_NOT_SET)
+ fatal("%.200s line %d: unsupported log level '%s'",
+ 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 == NULL || *arg == '\0')
+ fatal("%.200s line %d: Missing port argument.",
+ filename, linenum);
+
+ 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 (*activep) {
+ if (opcode == oLocalForward ||
+ opcode == oDynamicForward)
+ add_local_forward(options, &fwd);
+ else if (opcode == oRemoteForward)
+ add_remote_forward(options, &fwd);
+ }
+ break;
+
+ case oClearAllForwardings:
+ intptr = &options->clear_forwardings;
+ goto parse_flag;
+
+ case oHost:
+ *activep = 0;
+ while ((arg = strdelim(&s)) != NULL && *arg != '\0')
+ if (match_pattern(host, arg)) {
+ debug("Applying options for %.100s", arg);
+ *activep = 1;
+ break;
+ }
+ /* Avoid garbage check below, as strdelim is done. */
+ return 0;
+
+ case oEscapeChar:
+ intptr = &options->escape_char;
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (arg[0] == '^' && arg[2] == 0 &&
+ (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
+ value = (u_char) arg[1] & 31;
+ else if (strlen(arg) == 1)
+ value = (u_char) arg[0];
+ else if (strcmp(arg, "none") == 0)
+ value = SSH_ESCAPECHAR_NONE;
+ else {
+ fatal("%.200s line %d: Bad escape character.",
+ filename, linenum);
+ /* NOTREACHED */
+ value = 0; /* Avoid compiler warning. */
+ }
+ if (*activep && *intptr == -1)
+ *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 oRDomain:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.",
+ filename, linenum);
+ value = a2port(arg);
+ if (value == -1)
+ fatal("%.200s line %d: Bad rdomain.",
+ filename, linenum);
+ if (*activep)
+ options->rdomain = value;
+ break;
+
+ 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);
}
- if (*activep && *charptr == NULL)
- *charptr = string;
- else
- xfree(string);
- return;
-
- case oPort:
- intptr = &options->port;
- parse_int:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
- fatal("%.200s line %d: Bad number.", filename, linenum);
-#if 0
- value = atoi(cp);
-#else
- {
- char *ptr;
- value = strtol(cp, &ptr, 0); /* Octal, decimal, or hex format? */
- if (cp == ptr)
- fatal("%.200s line %d: Bad number.", filename, linenum);
- }
-#endif
- if (*activep && *intptr == -1)
- *intptr = value;
- break;
-
- case oConnectionAttempts:
- intptr = &options->connection_attempts;
- goto parse_int;
-
- case oCipher:
- intptr = &options->cipher;
- cp = strtok(NULL, WHITESPACE);
- value = cipher_number(cp);
- if (value == -1)
- fatal("%.200s line %d: Bad cipher.", filename, linenum);
- if (*activep && *intptr == -1)
- *intptr = value;
- break;
-
- case oLogLevel:
- 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 oRemoteForward:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
- fatal("%.200s line %d: Badly formatted port number.",
- filename, linenum);
- fwd_port = atoi(cp);
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing second argument.",
- filename, linenum);
- if (sscanf(cp, "%255[^:]:%d", buf, &fwd_host_port) != 2)
- fatal("%.200s line %d: Badly formatted host:port.",
- filename, linenum);
- if (*activep)
- add_remote_forward(options, fwd_port, buf, fwd_host_port);
- break;
-
- case oLocalForward:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
- fatal("%.200s line %d: Badly formatted port number.",
- filename, linenum);
- fwd_port = atoi(cp);
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing second argument.",
- filename, linenum);
- if (sscanf(cp, "%255[^:]:%d", buf, &fwd_host_port) != 2)
- fatal("%.200s line %d: Badly formatted host:port.",
- filename, linenum);
- if (*activep)
- add_local_forward(options, fwd_port, buf, fwd_host_port);
- break;
-
- case oHost:
- *activep = 0;
- while ((cp = strtok(NULL, WHITESPACE)) != NULL)
- if (match_pattern(host, cp))
- {
- debug("Applying options for %.100s", cp);
- *activep = 1;
- break;
- }
- /* Avoid garbage check below, as strtok already returned NULL. */
- return;
-
- case oEscapeChar:
- intptr = &options->escape_char;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] == '^' && cp[2] == 0 &&
- (unsigned char)cp[1] >= 64 && (unsigned char)cp[1] < 128)
- value = (unsigned char)cp[1] & 31;
- else
- if (strlen(cp) == 1)
- value = (unsigned char)cp[0];
- else
- if (strcmp(cp, "none") == 0)
- value = -2;
- else
- {
- fatal("%.200s line %d: Bad escape character.",
- filename, linenum);
- /*NOTREACHED*/
- value = 0; /* Avoid compiler warning. */
- }
- if (*activep && *intptr == -1)
- *intptr = value;
- break;
-
- default:
- fatal("parse_config_file: Unimplemented opcode %d", opcode);
- }
-
- /* Check that there is no garbage at end of line. */
- if (strtok(NULL, WHITESPACE) != NULL)
- fatal("%.200s line %d: garbage at end of line.",
- filename, linenum);
-}
+ /* 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);
+ }
+ return 0;
+}
-/* Reads the config file and modifies the options accordingly. Options should
- already be initialized before this call. This never returns if there
- is an error. If the file does not exist, this returns immediately. */
-void read_config_file(const char *filename, const char *host, Options *options)
+/*
+ * Reads the config file and modifies the options accordingly. Options
+ * should already be initialized before this call. This never returns if
+ * there is an error. If the file does not exist, this returns 0.
+ */
+
+int
+read_config_file(const char *filename, const char *host, Options *options,
+ int checkperm)
{
- FILE *f;
- char line[1024];
- int active, linenum;
-
- /* Open the file. */
- f = fopen(filename, "r");
- if (!f)
- return;
-
- 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++;
-
- process_config_line(options, host, line, filename, linenum, &active);
- }
- fclose(f);
-}
+ FILE *f;
+ char line[1024];
+ int active, linenum;
+ int bad_options = 0;
+
+ 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);
+ }
-/* 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. */
+ 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)
+ fatal("%s: terminating, %d bad configuration options",
+ filename, bad_options);
+ return 1;
+}
-void initialize_options(Options *options)
+/*
+ * 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
+initialize_options(Options * options)
{
- memset(options, 'X', sizeof(*options));
- options->forward_agent = -1;
- options->forward_x11 = -1;
- options->gateway_ports = -1;
- options->use_privileged_port = -1;
- options->rhosts_authentication = -1;
- options->rsa_authentication = -1;
-#ifdef KRB4
- options->kerberos_authentication = -1;
-#endif
-#ifdef AFS
- options->kerberos_tgt_passing = -1;
- options->afs_token_passing = -1;
-#endif
- options->password_authentication = -1;
- options->rhosts_rsa_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->compression_level = -1;
- options->port = -1;
- options->connection_attempts = -1;
- options->number_of_password_prompts = -1;
- options->cipher = -1;
- options->num_identity_files = 0;
- options->hostname = NULL;
- options->proxy_command = NULL;
- options->user = NULL;
- options->escape_char = -1;
- options->system_hostfile = NULL;
- options->user_hostfile = NULL;
- options->num_local_forwards = 0;
- options->num_remote_forwards = 0;
- options->log_level = (LogLevel)-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->rsa_authentication = -1;
+ options->pubkey_authentication = -1;
+ options->challenge_response_authentication = -1;
+ 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->batch_mode = -1;
+ options->check_host_ip = -1;
+ options->strict_host_key_checking = -1;
+ options->compression = -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->macs = NULL;
+ options->hostkeyalgorithms = NULL;
+ options->protocol = SSH_PROTO_UNKNOWN;
+ options->num_identity_files = 0;
+ options->hostname = NULL;
+ options->host_key_alias = NULL;
+ 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;
+ options->num_local_forwards = 0;
+ options->num_remote_forwards = 0;
+ options->clear_forwardings = -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->rdomain = -1;
+ options->visual_host_key = -1;
+ options->zero_knowledge_password_authentication = -1;
}
-/* Called after processing other sources of option data, this fills those
- options for which no value has been specified with their default values. */
+/*
+ * Called after processing other sources of option data, this fills those
+ * options for which no value has been specified with their default values.
+ */
-void fill_default_options(Options *options)
+void
+fill_default_options(Options * options)
{
- if (options->forward_agent == -1)
- options->forward_agent = 1;
- if (options->forward_x11 == -1)
- options->forward_x11 = 1;
- if (options->gateway_ports == -1)
- options->gateway_ports = 0;
- if (options->use_privileged_port == -1)
- options->use_privileged_port = 1;
- if (options->rhosts_authentication == -1)
- options->rhosts_authentication = 1;
- if (options->rsa_authentication == -1)
- options->rsa_authentication = 1;
-#ifdef KRB4
- if (options->kerberos_authentication == -1)
- options->kerberos_authentication = 1;
-#endif /* KRB4 */
-#ifdef AFS
- if (options->kerberos_tgt_passing == -1)
- options->kerberos_tgt_passing = 1;
- if (options->afs_token_passing == -1)
- options->afs_token_passing = 1;
-#endif /* AFS */
- if (options->password_authentication == -1)
- options->password_authentication = 1;
- if (options->rhosts_rsa_authentication == -1)
- options->rhosts_rsa_authentication = 1;
- if (options->fallback_to_rsh == -1)
- options->fallback_to_rsh = 1;
- 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 = 1;
- 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)
- options->connection_attempts = 4;
- if (options->number_of_password_prompts == -1)
- options->number_of_password_prompts = 3;
- if (options->cipher == -1)
- options->cipher = SSH_CIPHER_NOT_SET; /* Selected in ssh_login(). */
- if (options->num_identity_files == 0)
- {
- options->identity_files[0] =
- xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1);
- sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY);
- options->num_identity_files = 1;
- }
- if (options->escape_char == -1)
- options->escape_char = '~';
- if (options->system_hostfile == NULL)
- options->system_hostfile = SSH_SYSTEM_HOSTFILE;
- if (options->user_hostfile == NULL)
- options->user_hostfile = SSH_USER_HOSTFILE;
- if (options->log_level == (LogLevel)-1)
- options->log_level = SYSLOG_LEVEL_INFO;
- /* 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 */
+ int len;
+
+ if (options->forward_agent == -1)
+ options->forward_agent = 0;
+ if (options->forward_x11 == -1)
+ options->forward_x11 = 0;
+ 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;
+ if (options->gateway_ports == -1)
+ options->gateway_ports = 0;
+ if (options->use_privileged_port == -1)
+ options->use_privileged_port = 0;
+ 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 (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 = 0;
+ if (options->hostbased_authentication == -1)
+ options->hostbased_authentication = 0;
+ if (options->batch_mode == -1)
+ options->batch_mode = 0;
+ if (options->check_host_ip == -1)
+ options->check_host_ip = 1;
+ 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->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->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 */
+ /* options->macs, default set in myproposals.h */
+ /* options->hostkeyalgorithms, default set in myproposals.h */
+ if (options->protocol == SSH_PROTO_UNKNOWN)
+ 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->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);
+ }
+ }
+ if (options->escape_char == -1)
+ options->escape_char = '~';
+ if (options->system_hostfile == NULL)
+ options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
+ if (options->user_hostfile == NULL)
+ options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
+ if (options->system_hostfile2 == NULL)
+ options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
+ if (options->user_hostfile2 == NULL)
+ options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
+ 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 */
+ /* options->rdomain should not be set by default */
}
+/*
+ * 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