diff options
author | des <des@FreeBSD.org> | 2008-07-22 19:01:18 +0000 |
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committer | des <des@FreeBSD.org> | 2008-07-22 19:01:18 +0000 |
commit | f1596419c2717cb81dd4b676d5e0cf1a3e30e98c (patch) | |
tree | 9827eb822991aa369cf5d220fce40c3d2011c19f /crypto/openssh/readconf.c | |
parent | 666aa9cc1660793c97ef29a6cb66dfbb894dde8f (diff) | |
download | FreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.zip FreeBSD-src-f1596419c2717cb81dd4b676d5e0cf1a3e30e98c.tar.gz |
Properly flatten openssh/dist.
Diffstat (limited to 'crypto/openssh/readconf.c')
-rw-r--r-- | crypto/openssh/readconf.c | 1273 |
1 files changed, 0 insertions, 1273 deletions
diff --git a/crypto/openssh/readconf.c b/crypto/openssh/readconf.c deleted file mode 100644 index 4cacf60..0000000 --- a/crypto/openssh/readconf.c +++ /dev/null @@ -1,1273 +0,0 @@ -/* $OpenBSD: readconf.c,v 1.159 2006/08/03 03:34:42 deraadt 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". - */ - -#include "includes.h" - -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/socket.h> - -#include <netinet/in.h> - -#include <ctype.h> -#include <errno.h> -#include <netdb.h> -#include <signal.h> -#include <stdarg.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#include "xmalloc.h" -#include "ssh.h" -#include "compat.h" -#include "cipher.h" -#include "pathnames.h" -#include "log.h" -#include "key.h" -#include "readconf.h" -#include "match.h" -#include "misc.h" -#include "buffer.h" -#include "kex.h" -#include "mac.h" - -/* 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 - User foo - - 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 - PasswordAuthentication no - - Host puukko.hut.fi - User t35124p - ProxyCommand ssh-proxy %h %p - - Host *.fr - PublicKeyAuthentication no - - Host *.su - Cipher none - PasswordAuthentication no - - Host vpn.fake.com - Tunnel yes - TunnelDevice 3 - - # Defaults for various options - Host * - ForwardAgent no - ForwardX11 no - PasswordAuthentication yes - RSAAuthentication yes - RhostsRSAAuthentication yes - StrictHostKeyChecking yes - TcpKeepAlive no - IdentityFile ~/.ssh/identity - Port 22 - EscapeChar ~ - -*/ - -/* Keyword tokens. */ - -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, - oDeprecated, oUnsupported -} OpCodes; - -/* Textual representations of the tokens. */ - -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 }, /* alias */ - { "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 }, - { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ - { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, - { "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 }, - { NULL, oBadOption } -}; - -/* - * 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 == NULL) ? - NULL : xstrdup(newfwd->listen_host); - fwd->listen_port = newfwd->listen_port; - fwd->connect_host = xstrdup(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, const Forward *newfwd) -{ - Forward *fwd; - if (options->num_remote_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION) - fatal("Too many remote forwards (max %d).", - SSH_MAX_FORWARDS_PER_DIRECTION); - fwd = &options->remote_forwards[options->num_remote_forwards++]; - - fwd->listen_host = (newfwd->listen_host == NULL) ? - NULL : xstrdup(newfwd->listen_host); - fwd->listen_port = newfwd->listen_port; - fwd->connect_host = xstrdup(newfwd->connect_host); - fwd->connect_port = newfwd->connect_port; -} - -static void -clear_forwardings(Options *options) -{ - 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 or oBadOption. - */ - -static OpCodes -parse_token(const char *cp, const char *filename, int linenum) -{ - u_int i; - - for (i = 0; keywords[i].name; i++) - if (strcasecmp(cp, keywords[i].name) == 0) - return keywords[i].opcode; - - 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. - */ -#define WHITESPACE " \t\r\n" - -int -process_config_line(Options *options, const char *host, - char *line, const char *filename, int linenum, - int *activep) -{ - char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; - int opcode, *intptr, value, value2, scale; - long long orig, val64; - size_t len; - Forward fwd; - - /* Strip trailing whitespace */ - for (len = strlen(line) - 1; len > 0; len--) { - if (strchr(WHITESPACE, line[len]) == NULL) - break; - line[len] = '\0'; - } - - s = line; - /* Get the keyword. (Each line is supposed to begin with a keyword). */ - 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 (*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 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: - intptr = &options->rekey_limit; - 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 > INT_MAX) - fatal("%.200s line %d: RekeyLimit too large", - filename, linenum); - if (val64 < 16) - fatal("%.200s line %d: RekeyLimit too small", - filename, linenum); - if (*activep && *intptr == -1) - *intptr = (int)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: - intptr = (int *) &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 && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) - *intptr = (LogLevel) value; - break; - - case oLocalForward: - case oRemoteForward: - arg = strdelim(&s); - if (arg == NULL || *arg == '\0') - fatal("%.200s line %d: Missing port argument.", - filename, linenum); - 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); - - if (parse_forward(&fwd, fwdarg) == 0) - fatal("%.200s line %d: Bad forwarding specification.", - filename, linenum); - - if (*activep) { - if (opcode == oLocalForward) - add_local_forward(options, &fwd); - else if (opcode == oRemoteForward) - add_remote_forward(options, &fwd); - } - break; - - case oDynamicForward: - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing port argument.", - filename, linenum); - memset(&fwd, '\0', sizeof(fwd)); - fwd.connect_host = "socks"; - fwd.listen_host = hpdelim(&arg); - if (fwd.listen_host == NULL || - strlen(fwd.listen_host) >= NI_MAXHOST) - fatal("%.200s line %d: Bad forwarding specification.", - filename, linenum); - if (arg) { - fwd.listen_port = a2port(arg); - fwd.listen_host = cleanhostname(fwd.listen_host); - } else { - fwd.listen_port = a2port(fwd.listen_host); - fwd.listen_host = NULL; - } - if (fwd.listen_port == 0) - fatal("%.200s line %d: Badly formatted port number.", - filename, linenum); - if (*activep) - add_local_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 oDeprecated: - debug("%s line %d: Deprecated option \"%s\"", - filename, linenum, keyword); - return 0; - - case oUnsupported: - error("%s line %d: Unsupported option \"%s\"", - filename, linenum, keyword); - return 0; - - default: - fatal("process_config_line: Unimplemented opcode %d", opcode); - } - - /* Check that there is no garbage at end of line. */ - if ((arg = strdelim(&s)) != NULL && *arg != '\0') { - fatal("%.200s line %d: garbage at end of line; \"%.200s\".", - filename, linenum, arg); - } - 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 0. - */ - -int -read_config_file(const char *filename, const char *host, Options *options, - int checkperm) -{ - FILE *f; - char line[1024]; - int active, linenum; - int bad_options = 0; - - /* Open the file. */ - if ((f = fopen(filename, "r")) == NULL) - return 0; - - if (checkperm) { - struct stat sb; - - if (fstat(fileno(f), &sb) == -1) - fatal("fstat %s: %s", filename, strerror(errno)); - if (((sb.st_uid != 0 && sb.st_uid != getuid()) || - (sb.st_mode & 022) != 0)) - fatal("Bad owner or permissions on %s", filename); - } - - debug("Reading configuration data %.200s", filename); - - /* - * 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; -} - -/* - * 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->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; -} - -/* - * 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) -{ - 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_1|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; - /* options->local_command should not be set by default */ - /* options->proxy_command should not be set by default */ - /* options->user will be set in the main program if appropriate */ - /* options->hostname will be set in the main program if appropriate */ - /* options->host_key_alias should not be set by default */ - /* options->preferred_authentications will be set in ssh */ -} - -/* - * parse_forward - * parses a string containing a port forwarding specification of the form: - * [listenhost:]listenport:connecthost:connectport - * returns number of arguments parsed or zero on error - */ -int -parse_forward(Forward *fwd, const char *fwdspec) -{ - int i; - char *p, *cp, *fwdarg[4]; - - memset(fwd, '\0', sizeof(*fwd)); - - cp = p = xstrdup(fwdspec); - - /* skip leading spaces */ - while (*cp && isspace(*cp)) - cp++; - - for (i = 0; i < 4; ++i) - if ((fwdarg[i] = hpdelim(&cp)) == NULL) - break; - - /* Check for trailing garbage in 4-arg case*/ - if (cp != NULL) - i = 0; /* failure */ - - switch (i) { - 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 (fwd->listen_port == 0 && fwd->connect_port == 0) - goto fail_free; - - if (fwd->connect_host != NULL && - strlen(fwd->connect_host) >= NI_MAXHOST) - goto fail_free; - - return (i); - - fail_free: - if (fwd->connect_host != NULL) - xfree(fwd->connect_host); - if (fwd->listen_host != NULL) - xfree(fwd->listen_host); - return (0); -} |