Revert to upstream's default. Using VerifyHostKeyDNS may depend on a
trusted nameserver and network path.
This reverts commit 83c6a5242c
.
Reported by: David Leadbeater, G-Research
Reviewed by: gordon
Relnotes: Yes
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D38648
3495 lines
98 KiB
C
3495 lines
98 KiB
C
/* $OpenBSD: readconf.c,v 1.372 2023/01/13 02:58:20 dtucker Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Functions for reading the configuration files.
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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#include "includes.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <netdb.h>
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#ifdef HAVE_PATHS_H
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# include <paths.h>
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#endif
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#include <pwd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#ifdef USE_SYSTEM_GLOB
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# include <glob.h>
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#else
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# include "openbsd-compat/glob.h"
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#endif
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#ifdef HAVE_UTIL_H
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#include <util.h>
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#endif
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#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
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# include <vis.h>
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#endif
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#include "xmalloc.h"
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#include "ssh.h"
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#include "ssherr.h"
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#include "compat.h"
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#include "cipher.h"
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#include "pathnames.h"
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#include "log.h"
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#include "sshkey.h"
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#include "misc.h"
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#include "readconf.h"
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#include "match.h"
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#include "kex.h"
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#include "mac.h"
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#include "uidswap.h"
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#include "myproposal.h"
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#include "digest.h"
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/* Format of the configuration file:
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# Configuration data is parsed as follows:
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# 1. command line options
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# 2. user-specific file
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# 3. system-wide file
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# Any configuration value is only changed the first time it is set.
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# Thus, host-specific definitions should be at the beginning of the
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# configuration file, and defaults at the end.
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# Host-specific declarations. These may override anything above. A single
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# host may match multiple declarations; these are processed in the order
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# that they are given in.
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Host *.ngs.fi ngs.fi
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User foo
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Host fake.com
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Hostname another.host.name.real.org
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User blaah
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Port 34289
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ForwardX11 no
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ForwardAgent no
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Host books.com
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RemoteForward 9999 shadows.cs.hut.fi:9999
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Ciphers 3des-cbc
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Host fascist.blob.com
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Port 23123
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User tylonen
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PasswordAuthentication no
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Host puukko.hut.fi
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User t35124p
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ProxyCommand ssh-proxy %h %p
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Host *.fr
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PublicKeyAuthentication no
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Host *.su
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Ciphers aes128-ctr
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PasswordAuthentication no
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Host vpn.fake.com
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Tunnel yes
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TunnelDevice 3
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# Defaults for various options
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Host *
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ForwardAgent no
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ForwardX11 no
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PasswordAuthentication yes
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StrictHostKeyChecking yes
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TcpKeepAlive no
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IdentityFile ~/.ssh/identity
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Port 22
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EscapeChar ~
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*/
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static int read_config_file_depth(const char *filename, struct passwd *pw,
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const char *host, const char *original_host, Options *options,
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int flags, int *activep, int *want_final_pass, int depth);
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static int process_config_line_depth(Options *options, struct passwd *pw,
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const char *host, const char *original_host, char *line,
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const char *filename, int linenum, int *activep, int flags,
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int *want_final_pass, int depth);
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/* Keyword tokens. */
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typedef enum {
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oBadOption,
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oHost, oMatch, oInclude,
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oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
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oGatewayPorts, oExitOnForwardFailure,
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oPasswordAuthentication,
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oXAuthLocation,
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oIdentityFile, oHostname, oPort, oRemoteForward, oLocalForward,
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oPermitRemoteOpen,
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oCertificateFile, oAddKeysToAgent, oIdentityAgent,
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oUser, oEscapeChar, oProxyCommand,
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oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
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oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
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oTCPKeepAlive, oNumberOfPasswordPrompts,
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oLogFacility, oLogLevel, oLogVerbose, oCiphers, oMacs,
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oPubkeyAuthentication,
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oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
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oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
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oHostKeyAlgorithms, oBindAddress, oBindInterface, oPKCS11Provider,
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oClearAllForwardings, oNoHostAuthenticationForLocalhost,
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oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
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oAddressFamily, oGssAuthentication, oGssDelegateCreds,
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oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
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oSendEnv, oSetEnv, oControlPath, oControlMaster, oControlPersist,
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oHashKnownHosts,
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oTunnel, oTunnelDevice,
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oLocalCommand, oPermitLocalCommand, oRemoteCommand,
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oVisualHostKey,
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oKexAlgorithms, oIPQoS, oRequestTTY, oSessionType, oStdinNull,
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oForkAfterAuthentication, oIgnoreUnknown, oProxyUseFdpass,
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oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
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oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
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oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
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oFingerprintHash, oUpdateHostkeys, oHostbasedAcceptedAlgorithms,
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oPubkeyAcceptedAlgorithms, oCASignatureAlgorithms, oProxyJump,
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oSecurityKeyProvider, oKnownHostsCommand, oRequiredRSASize,
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oEnableEscapeCommandline,
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oIgnore, oIgnoredUnknownOption, oDeprecated, oUnsupported
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} OpCodes;
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/* Textual representations of the tokens. */
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static struct {
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const char *name;
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OpCodes opcode;
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} keywords[] = {
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/* Deprecated options */
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{ "protocol", oIgnore }, /* NB. silently ignored */
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{ "cipher", oDeprecated },
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{ "fallbacktorsh", oDeprecated },
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{ "globalknownhostsfile2", oDeprecated },
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{ "rhostsauthentication", oDeprecated },
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{ "userknownhostsfile2", oDeprecated },
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{ "useroaming", oDeprecated },
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{ "usersh", oDeprecated },
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{ "useprivilegedport", oDeprecated },
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/* Unsupported options */
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{ "afstokenpassing", oUnsupported },
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{ "kerberosauthentication", oUnsupported },
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{ "kerberostgtpassing", oUnsupported },
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{ "rsaauthentication", oUnsupported },
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{ "rhostsrsaauthentication", oUnsupported },
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{ "compressionlevel", oUnsupported },
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/* Sometimes-unsupported options */
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#if defined(GSSAPI)
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{ "gssapiauthentication", oGssAuthentication },
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{ "gssapidelegatecredentials", oGssDelegateCreds },
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# else
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{ "gssapiauthentication", oUnsupported },
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{ "gssapidelegatecredentials", oUnsupported },
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#endif
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#ifdef ENABLE_PKCS11
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{ "pkcs11provider", oPKCS11Provider },
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{ "smartcarddevice", oPKCS11Provider },
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# else
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{ "smartcarddevice", oUnsupported },
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{ "pkcs11provider", oUnsupported },
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#endif
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{ "forwardagent", oForwardAgent },
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{ "forwardx11", oForwardX11 },
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{ "forwardx11trusted", oForwardX11Trusted },
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{ "forwardx11timeout", oForwardX11Timeout },
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{ "exitonforwardfailure", oExitOnForwardFailure },
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{ "xauthlocation", oXAuthLocation },
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{ "gatewayports", oGatewayPorts },
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{ "passwordauthentication", oPasswordAuthentication },
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{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
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{ "kbdinteractivedevices", oKbdInteractiveDevices },
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{ "challengeresponseauthentication", oKbdInteractiveAuthentication }, /* alias */
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{ "skeyauthentication", oKbdInteractiveAuthentication }, /* alias */
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{ "tisauthentication", oKbdInteractiveAuthentication }, /* alias */
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{ "pubkeyauthentication", oPubkeyAuthentication },
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{ "dsaauthentication", oPubkeyAuthentication }, /* alias */
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{ "hostbasedauthentication", oHostbasedAuthentication },
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{ "identityfile", oIdentityFile },
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{ "identityfile2", oIdentityFile }, /* obsolete */
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{ "identitiesonly", oIdentitiesOnly },
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{ "certificatefile", oCertificateFile },
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{ "addkeystoagent", oAddKeysToAgent },
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{ "identityagent", oIdentityAgent },
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{ "hostname", oHostname },
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{ "hostkeyalias", oHostKeyAlias },
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{ "proxycommand", oProxyCommand },
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{ "port", oPort },
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{ "ciphers", oCiphers },
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{ "macs", oMacs },
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{ "remoteforward", oRemoteForward },
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{ "localforward", oLocalForward },
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{ "permitremoteopen", oPermitRemoteOpen },
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{ "user", oUser },
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{ "host", oHost },
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{ "match", oMatch },
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{ "escapechar", oEscapeChar },
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{ "globalknownhostsfile", oGlobalKnownHostsFile },
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{ "userknownhostsfile", oUserKnownHostsFile },
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{ "connectionattempts", oConnectionAttempts },
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{ "batchmode", oBatchMode },
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{ "checkhostip", oCheckHostIP },
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{ "stricthostkeychecking", oStrictHostKeyChecking },
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{ "compression", oCompression },
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{ "tcpkeepalive", oTCPKeepAlive },
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{ "keepalive", oTCPKeepAlive }, /* obsolete */
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{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
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{ "syslogfacility", oLogFacility },
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{ "loglevel", oLogLevel },
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{ "logverbose", oLogVerbose },
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{ "dynamicforward", oDynamicForward },
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{ "preferredauthentications", oPreferredAuthentications },
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{ "hostkeyalgorithms", oHostKeyAlgorithms },
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{ "casignaturealgorithms", oCASignatureAlgorithms },
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{ "bindaddress", oBindAddress },
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{ "bindinterface", oBindInterface },
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{ "clearallforwardings", oClearAllForwardings },
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{ "enablesshkeysign", oEnableSSHKeysign },
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{ "verifyhostkeydns", oVerifyHostKeyDNS },
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{ "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
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{ "rekeylimit", oRekeyLimit },
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{ "connecttimeout", oConnectTimeout },
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{ "addressfamily", oAddressFamily },
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{ "serveraliveinterval", oServerAliveInterval },
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{ "serveralivecountmax", oServerAliveCountMax },
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{ "sendenv", oSendEnv },
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{ "setenv", oSetEnv },
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{ "controlpath", oControlPath },
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{ "controlmaster", oControlMaster },
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{ "controlpersist", oControlPersist },
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{ "hashknownhosts", oHashKnownHosts },
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{ "include", oInclude },
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{ "tunnel", oTunnel },
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{ "tunneldevice", oTunnelDevice },
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{ "localcommand", oLocalCommand },
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{ "permitlocalcommand", oPermitLocalCommand },
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{ "remotecommand", oRemoteCommand },
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{ "visualhostkey", oVisualHostKey },
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{ "kexalgorithms", oKexAlgorithms },
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{ "ipqos", oIPQoS },
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{ "requesttty", oRequestTTY },
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{ "sessiontype", oSessionType },
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{ "stdinnull", oStdinNull },
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{ "forkafterauthentication", oForkAfterAuthentication },
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{ "proxyusefdpass", oProxyUseFdpass },
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{ "canonicaldomains", oCanonicalDomains },
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{ "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
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{ "canonicalizehostname", oCanonicalizeHostname },
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{ "canonicalizemaxdots", oCanonicalizeMaxDots },
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{ "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
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{ "streamlocalbindmask", oStreamLocalBindMask },
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{ "streamlocalbindunlink", oStreamLocalBindUnlink },
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{ "revokedhostkeys", oRevokedHostKeys },
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{ "fingerprinthash", oFingerprintHash },
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{ "updatehostkeys", oUpdateHostkeys },
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{ "hostbasedacceptedalgorithms", oHostbasedAcceptedAlgorithms },
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{ "hostbasedkeytypes", oHostbasedAcceptedAlgorithms }, /* obsolete */
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{ "pubkeyacceptedalgorithms", oPubkeyAcceptedAlgorithms },
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{ "pubkeyacceptedkeytypes", oPubkeyAcceptedAlgorithms }, /* obsolete */
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{ "ignoreunknown", oIgnoreUnknown },
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{ "proxyjump", oProxyJump },
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{ "securitykeyprovider", oSecurityKeyProvider },
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{ "knownhostscommand", oKnownHostsCommand },
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{ "requiredrsasize", oRequiredRSASize },
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{ "enableescapecommandline", oEnableEscapeCommandline },
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{ "hpndisabled", oDeprecated },
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{ "hpnbuffersize", oDeprecated },
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{ "tcprcvbufpoll", oDeprecated },
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{ "tcprcvbuf", oDeprecated },
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{ "noneenabled", oUnsupported },
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{ "noneswitch", oUnsupported },
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{ "versionaddendum", oDeprecated },
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{ NULL, oBadOption }
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};
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static const char *lookup_opcode_name(OpCodes code);
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const char *
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kex_default_pk_alg(void)
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{
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static char *pkalgs;
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if (pkalgs == NULL) {
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char *all_key;
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all_key = sshkey_alg_list(0, 0, 1, ',');
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pkalgs = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
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free(all_key);
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}
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return pkalgs;
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}
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char *
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ssh_connection_hash(const char *thishost, const char *host, const char *portstr,
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const char *user)
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{
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struct ssh_digest_ctx *md;
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u_char conn_hash[SSH_DIGEST_MAX_LENGTH];
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if ((md = ssh_digest_start(SSH_DIGEST_SHA1)) == NULL ||
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ssh_digest_update(md, thishost, strlen(thishost)) < 0 ||
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ssh_digest_update(md, host, strlen(host)) < 0 ||
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ssh_digest_update(md, portstr, strlen(portstr)) < 0 ||
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ssh_digest_update(md, user, strlen(user)) < 0 ||
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ssh_digest_final(md, conn_hash, sizeof(conn_hash)) < 0)
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fatal_f("mux digest failed");
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ssh_digest_free(md);
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return tohex(conn_hash, ssh_digest_bytes(SSH_DIGEST_SHA1));
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}
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/*
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* Adds a local TCP/IP port forward to options. Never returns if there is an
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* error.
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*/
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void
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add_local_forward(Options *options, const struct Forward *newfwd)
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{
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struct Forward *fwd;
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int i;
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/* Don't add duplicates */
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for (i = 0; i < options->num_local_forwards; i++) {
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if (forward_equals(newfwd, options->local_forwards + i))
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return;
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}
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options->local_forwards = xreallocarray(options->local_forwards,
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options->num_local_forwards + 1,
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sizeof(*options->local_forwards));
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fwd = &options->local_forwards[options->num_local_forwards++];
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fwd->listen_host = newfwd->listen_host;
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fwd->listen_port = newfwd->listen_port;
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fwd->listen_path = newfwd->listen_path;
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fwd->connect_host = newfwd->connect_host;
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fwd->connect_port = newfwd->connect_port;
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fwd->connect_path = newfwd->connect_path;
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}
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/*
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* Adds a remote TCP/IP port forward to options. Never returns if there is
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* an error.
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*/
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void
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add_remote_forward(Options *options, const struct Forward *newfwd)
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{
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struct Forward *fwd;
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int i;
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/* Don't add duplicates */
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for (i = 0; i < options->num_remote_forwards; i++) {
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if (forward_equals(newfwd, options->remote_forwards + i))
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return;
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}
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options->remote_forwards = xreallocarray(options->remote_forwards,
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options->num_remote_forwards + 1,
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sizeof(*options->remote_forwards));
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fwd = &options->remote_forwards[options->num_remote_forwards++];
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fwd->listen_host = newfwd->listen_host;
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fwd->listen_port = newfwd->listen_port;
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fwd->listen_path = newfwd->listen_path;
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fwd->connect_host = newfwd->connect_host;
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fwd->connect_port = newfwd->connect_port;
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fwd->connect_path = newfwd->connect_path;
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fwd->handle = newfwd->handle;
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fwd->allocated_port = 0;
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}
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static void
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clear_forwardings(Options *options)
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{
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int i;
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for (i = 0; i < options->num_local_forwards; i++) {
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free(options->local_forwards[i].listen_host);
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free(options->local_forwards[i].listen_path);
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free(options->local_forwards[i].connect_host);
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free(options->local_forwards[i].connect_path);
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}
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if (options->num_local_forwards > 0) {
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free(options->local_forwards);
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options->local_forwards = NULL;
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}
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options->num_local_forwards = 0;
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for (i = 0; i < options->num_remote_forwards; i++) {
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free(options->remote_forwards[i].listen_host);
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free(options->remote_forwards[i].listen_path);
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free(options->remote_forwards[i].connect_host);
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free(options->remote_forwards[i].connect_path);
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}
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if (options->num_remote_forwards > 0) {
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free(options->remote_forwards);
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options->remote_forwards = NULL;
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}
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options->num_remote_forwards = 0;
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options->tun_open = SSH_TUNMODE_NO;
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}
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void
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add_certificate_file(Options *options, const char *path, int userprovided)
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{
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int i;
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if (options->num_certificate_files >= SSH_MAX_CERTIFICATE_FILES)
|
|
fatal("Too many certificate files specified (max %d)",
|
|
SSH_MAX_CERTIFICATE_FILES);
|
|
|
|
/* Avoid registering duplicates */
|
|
for (i = 0; i < options->num_certificate_files; i++) {
|
|
if (options->certificate_file_userprovided[i] == userprovided &&
|
|
strcmp(options->certificate_files[i], path) == 0) {
|
|
debug2_f("ignoring duplicate key %s", path);
|
|
return;
|
|
}
|
|
}
|
|
|
|
options->certificate_file_userprovided[options->num_certificate_files] =
|
|
userprovided;
|
|
options->certificate_files[options->num_certificate_files++] =
|
|
xstrdup(path);
|
|
}
|
|
|
|
void
|
|
add_identity_file(Options *options, const char *dir, const char *filename,
|
|
int userprovided)
|
|
{
|
|
char *path;
|
|
int i;
|
|
|
|
if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
|
|
fatal("Too many identity files specified (max %d)",
|
|
SSH_MAX_IDENTITY_FILES);
|
|
|
|
if (dir == NULL) /* no dir, filename is absolute */
|
|
path = xstrdup(filename);
|
|
else if (xasprintf(&path, "%s%s", dir, filename) >= PATH_MAX)
|
|
fatal("Identity file path %s too long", path);
|
|
|
|
/* Avoid registering duplicates */
|
|
for (i = 0; i < options->num_identity_files; i++) {
|
|
if (options->identity_file_userprovided[i] == userprovided &&
|
|
strcmp(options->identity_files[i], path) == 0) {
|
|
debug2_f("ignoring duplicate key %s", path);
|
|
free(path);
|
|
return;
|
|
}
|
|
}
|
|
|
|
options->identity_file_userprovided[options->num_identity_files] =
|
|
userprovided;
|
|
options->identity_files[options->num_identity_files++] = path;
|
|
}
|
|
|
|
int
|
|
default_ssh_port(void)
|
|
{
|
|
static int port;
|
|
struct servent *sp;
|
|
|
|
if (port == 0) {
|
|
sp = getservbyname(SSH_SERVICE_NAME, "tcp");
|
|
port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
|
|
}
|
|
return port;
|
|
}
|
|
|
|
/*
|
|
* Execute a command in a shell.
|
|
* Return its exit status or -1 on abnormal exit.
|
|
*/
|
|
static int
|
|
execute_in_shell(const char *cmd)
|
|
{
|
|
char *shell;
|
|
pid_t pid;
|
|
int status;
|
|
|
|
if ((shell = getenv("SHELL")) == NULL)
|
|
shell = _PATH_BSHELL;
|
|
|
|
if (access(shell, X_OK) == -1) {
|
|
fatal("Shell \"%s\" is not executable: %s",
|
|
shell, strerror(errno));
|
|
}
|
|
|
|
debug("Executing command: '%.500s'", cmd);
|
|
|
|
/* Fork and execute the command. */
|
|
if ((pid = fork()) == 0) {
|
|
char *argv[4];
|
|
|
|
if (stdfd_devnull(1, 1, 0) == -1)
|
|
fatal_f("stdfd_devnull failed");
|
|
closefrom(STDERR_FILENO + 1);
|
|
|
|
argv[0] = shell;
|
|
argv[1] = "-c";
|
|
argv[2] = xstrdup(cmd);
|
|
argv[3] = NULL;
|
|
|
|
execv(argv[0], argv);
|
|
error("Unable to execute '%.100s': %s", cmd, strerror(errno));
|
|
/* Die with signal to make this error apparent to parent. */
|
|
ssh_signal(SIGTERM, SIG_DFL);
|
|
kill(getpid(), SIGTERM);
|
|
_exit(1);
|
|
}
|
|
/* Parent. */
|
|
if (pid == -1)
|
|
fatal_f("fork: %.100s", strerror(errno));
|
|
|
|
while (waitpid(pid, &status, 0) == -1) {
|
|
if (errno != EINTR && errno != EAGAIN)
|
|
fatal_f("waitpid: %s", strerror(errno));
|
|
}
|
|
if (!WIFEXITED(status)) {
|
|
error("command '%.100s' exited abnormally", cmd);
|
|
return -1;
|
|
}
|
|
debug3("command returned status %d", WEXITSTATUS(status));
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Parse and execute a Match directive.
|
|
*/
|
|
static int
|
|
match_cfg_line(Options *options, char **condition, struct passwd *pw,
|
|
const char *host_arg, const char *original_host, int final_pass,
|
|
int *want_final_pass, const char *filename, int linenum)
|
|
{
|
|
char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
|
|
const char *ruser;
|
|
int r, port, this_result, result = 1, attributes = 0, negate;
|
|
char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
|
|
char uidstr[32];
|
|
|
|
/*
|
|
* Configuration is likely to be incomplete at this point so we
|
|
* must be prepared to use default values.
|
|
*/
|
|
port = options->port <= 0 ? default_ssh_port() : options->port;
|
|
ruser = options->user == NULL ? pw->pw_name : options->user;
|
|
if (final_pass) {
|
|
host = xstrdup(options->hostname);
|
|
} else if (options->hostname != NULL) {
|
|
/* NB. Please keep in sync with ssh.c:main() */
|
|
host = percent_expand(options->hostname,
|
|
"h", host_arg, (char *)NULL);
|
|
} else {
|
|
host = xstrdup(host_arg);
|
|
}
|
|
|
|
debug2("checking match for '%s' host %s originally %s",
|
|
cp, host, original_host);
|
|
while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
|
|
/* Terminate on comment */
|
|
if (*attrib == '#') {
|
|
cp = NULL; /* mark all arguments consumed */
|
|
break;
|
|
}
|
|
arg = criteria = NULL;
|
|
this_result = 1;
|
|
if ((negate = attrib[0] == '!'))
|
|
attrib++;
|
|
/* Criterion "all" has no argument and must appear alone */
|
|
if (strcasecmp(attrib, "all") == 0) {
|
|
if (attributes > 1 || ((arg = strdelim(&cp)) != NULL &&
|
|
*arg != '\0' && *arg != '#')) {
|
|
error("%.200s line %d: '%s' cannot be combined "
|
|
"with other Match attributes",
|
|
filename, linenum, oattrib);
|
|
result = -1;
|
|
goto out;
|
|
}
|
|
if (arg != NULL && *arg == '#')
|
|
cp = NULL; /* mark all arguments consumed */
|
|
if (result)
|
|
result = negate ? 0 : 1;
|
|
goto out;
|
|
}
|
|
attributes++;
|
|
/* criteria "final" and "canonical" have no argument */
|
|
if (strcasecmp(attrib, "canonical") == 0 ||
|
|
strcasecmp(attrib, "final") == 0) {
|
|
/*
|
|
* If the config requests "Match final" then remember
|
|
* this so we can perform a second pass later.
|
|
*/
|
|
if (strcasecmp(attrib, "final") == 0 &&
|
|
want_final_pass != NULL)
|
|
*want_final_pass = 1;
|
|
r = !!final_pass; /* force bitmask member to boolean */
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
debug3("%.200s line %d: %smatched '%s'",
|
|
filename, linenum,
|
|
this_result ? "" : "not ", oattrib);
|
|
continue;
|
|
}
|
|
/* All other criteria require an argument */
|
|
if ((arg = strdelim(&cp)) == NULL ||
|
|
*arg == '\0' || *arg == '#') {
|
|
error("Missing Match criteria for %s", attrib);
|
|
result = -1;
|
|
goto out;
|
|
}
|
|
if (strcasecmp(attrib, "host") == 0) {
|
|
criteria = xstrdup(host);
|
|
r = match_hostname(host, arg) == 1;
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
} else if (strcasecmp(attrib, "originalhost") == 0) {
|
|
criteria = xstrdup(original_host);
|
|
r = match_hostname(original_host, arg) == 1;
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
} else if (strcasecmp(attrib, "user") == 0) {
|
|
criteria = xstrdup(ruser);
|
|
r = match_pattern_list(ruser, arg, 0) == 1;
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
} else if (strcasecmp(attrib, "localuser") == 0) {
|
|
criteria = xstrdup(pw->pw_name);
|
|
r = match_pattern_list(pw->pw_name, arg, 0) == 1;
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
} else if (strcasecmp(attrib, "exec") == 0) {
|
|
char *conn_hash_hex, *keyalias;
|
|
|
|
if (gethostname(thishost, sizeof(thishost)) == -1)
|
|
fatal("gethostname: %s", strerror(errno));
|
|
strlcpy(shorthost, thishost, sizeof(shorthost));
|
|
shorthost[strcspn(thishost, ".")] = '\0';
|
|
snprintf(portstr, sizeof(portstr), "%d", port);
|
|
snprintf(uidstr, sizeof(uidstr), "%llu",
|
|
(unsigned long long)pw->pw_uid);
|
|
conn_hash_hex = ssh_connection_hash(thishost, host,
|
|
portstr, ruser);
|
|
keyalias = options->host_key_alias ?
|
|
options->host_key_alias : host;
|
|
|
|
cmd = percent_expand(arg,
|
|
"C", conn_hash_hex,
|
|
"L", shorthost,
|
|
"d", pw->pw_dir,
|
|
"h", host,
|
|
"k", keyalias,
|
|
"l", thishost,
|
|
"n", original_host,
|
|
"p", portstr,
|
|
"r", ruser,
|
|
"u", pw->pw_name,
|
|
"i", uidstr,
|
|
(char *)NULL);
|
|
free(conn_hash_hex);
|
|
if (result != 1) {
|
|
/* skip execution if prior predicate failed */
|
|
debug3("%.200s line %d: skipped exec "
|
|
"\"%.100s\"", filename, linenum, cmd);
|
|
free(cmd);
|
|
continue;
|
|
}
|
|
r = execute_in_shell(cmd);
|
|
if (r == -1) {
|
|
fatal("%.200s line %d: match exec "
|
|
"'%.100s' error", filename,
|
|
linenum, cmd);
|
|
}
|
|
criteria = xstrdup(cmd);
|
|
free(cmd);
|
|
/* Force exit status to boolean */
|
|
r = r == 0;
|
|
if (r == (negate ? 1 : 0))
|
|
this_result = result = 0;
|
|
} else {
|
|
error("Unsupported Match attribute %s", attrib);
|
|
result = -1;
|
|
goto out;
|
|
}
|
|
debug3("%.200s line %d: %smatched '%s \"%.100s\"' ",
|
|
filename, linenum, this_result ? "": "not ",
|
|
oattrib, criteria);
|
|
free(criteria);
|
|
}
|
|
if (attributes == 0) {
|
|
error("One or more attributes required for Match");
|
|
result = -1;
|
|
goto out;
|
|
}
|
|
out:
|
|
if (result != -1)
|
|
debug2("match %sfound", result ? "" : "not ");
|
|
*condition = cp;
|
|
free(host);
|
|
return result;
|
|
}
|
|
|
|
/* Remove environment variable by pattern */
|
|
static void
|
|
rm_env(Options *options, const char *arg, const char *filename, int linenum)
|
|
{
|
|
u_int i, j, onum_send_env = options->num_send_env;
|
|
|
|
/* Remove an environment variable */
|
|
for (i = 0; i < options->num_send_env; ) {
|
|
if (!match_pattern(options->send_env[i], arg + 1)) {
|
|
i++;
|
|
continue;
|
|
}
|
|
debug3("%s line %d: removing environment %s",
|
|
filename, linenum, options->send_env[i]);
|
|
free(options->send_env[i]);
|
|
options->send_env[i] = NULL;
|
|
for (j = i; j < options->num_send_env - 1; j++) {
|
|
options->send_env[j] = options->send_env[j + 1];
|
|
options->send_env[j + 1] = NULL;
|
|
}
|
|
options->num_send_env--;
|
|
/* NB. don't increment i */
|
|
}
|
|
if (onum_send_env != options->num_send_env) {
|
|
options->send_env = xrecallocarray(options->send_env,
|
|
onum_send_env, options->num_send_env,
|
|
sizeof(*options->send_env));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the number of the token pointed to by cp or oBadOption.
|
|
*/
|
|
static OpCodes
|
|
parse_token(const char *cp, const char *filename, int linenum,
|
|
const char *ignored_unknown)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; keywords[i].name; i++)
|
|
if (strcmp(cp, keywords[i].name) == 0)
|
|
return keywords[i].opcode;
|
|
if (ignored_unknown != NULL &&
|
|
match_pattern_list(cp, ignored_unknown, 1) == 1)
|
|
return oIgnoredUnknownOption;
|
|
error("%s: line %d: Bad configuration option: %s",
|
|
filename, linenum, cp);
|
|
return oBadOption;
|
|
}
|
|
|
|
/* Multistate option parsing */
|
|
struct multistate {
|
|
char *key;
|
|
int value;
|
|
};
|
|
static const struct multistate multistate_flag[] = {
|
|
{ "true", 1 },
|
|
{ "false", 0 },
|
|
{ "yes", 1 },
|
|
{ "no", 0 },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_yesnoask[] = {
|
|
{ "true", 1 },
|
|
{ "false", 0 },
|
|
{ "yes", 1 },
|
|
{ "no", 0 },
|
|
{ "ask", 2 },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_strict_hostkey[] = {
|
|
{ "true", SSH_STRICT_HOSTKEY_YES },
|
|
{ "false", SSH_STRICT_HOSTKEY_OFF },
|
|
{ "yes", SSH_STRICT_HOSTKEY_YES },
|
|
{ "no", SSH_STRICT_HOSTKEY_OFF },
|
|
{ "ask", SSH_STRICT_HOSTKEY_ASK },
|
|
{ "off", SSH_STRICT_HOSTKEY_OFF },
|
|
{ "accept-new", SSH_STRICT_HOSTKEY_NEW },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_yesnoaskconfirm[] = {
|
|
{ "true", 1 },
|
|
{ "false", 0 },
|
|
{ "yes", 1 },
|
|
{ "no", 0 },
|
|
{ "ask", 2 },
|
|
{ "confirm", 3 },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_addressfamily[] = {
|
|
{ "inet", AF_INET },
|
|
{ "inet6", AF_INET6 },
|
|
{ "any", AF_UNSPEC },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_controlmaster[] = {
|
|
{ "true", SSHCTL_MASTER_YES },
|
|
{ "yes", SSHCTL_MASTER_YES },
|
|
{ "false", SSHCTL_MASTER_NO },
|
|
{ "no", SSHCTL_MASTER_NO },
|
|
{ "auto", SSHCTL_MASTER_AUTO },
|
|
{ "ask", SSHCTL_MASTER_ASK },
|
|
{ "autoask", SSHCTL_MASTER_AUTO_ASK },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_tunnel[] = {
|
|
{ "ethernet", SSH_TUNMODE_ETHERNET },
|
|
{ "point-to-point", SSH_TUNMODE_POINTOPOINT },
|
|
{ "true", SSH_TUNMODE_DEFAULT },
|
|
{ "yes", SSH_TUNMODE_DEFAULT },
|
|
{ "false", SSH_TUNMODE_NO },
|
|
{ "no", SSH_TUNMODE_NO },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_requesttty[] = {
|
|
{ "true", REQUEST_TTY_YES },
|
|
{ "yes", REQUEST_TTY_YES },
|
|
{ "false", REQUEST_TTY_NO },
|
|
{ "no", REQUEST_TTY_NO },
|
|
{ "force", REQUEST_TTY_FORCE },
|
|
{ "auto", REQUEST_TTY_AUTO },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_sessiontype[] = {
|
|
{ "none", SESSION_TYPE_NONE },
|
|
{ "subsystem", SESSION_TYPE_SUBSYSTEM },
|
|
{ "default", SESSION_TYPE_DEFAULT },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_canonicalizehostname[] = {
|
|
{ "true", SSH_CANONICALISE_YES },
|
|
{ "false", SSH_CANONICALISE_NO },
|
|
{ "yes", SSH_CANONICALISE_YES },
|
|
{ "no", SSH_CANONICALISE_NO },
|
|
{ "always", SSH_CANONICALISE_ALWAYS },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_pubkey_auth[] = {
|
|
{ "true", SSH_PUBKEY_AUTH_ALL },
|
|
{ "false", SSH_PUBKEY_AUTH_NO },
|
|
{ "yes", SSH_PUBKEY_AUTH_ALL },
|
|
{ "no", SSH_PUBKEY_AUTH_NO },
|
|
{ "unbound", SSH_PUBKEY_AUTH_UNBOUND },
|
|
{ "host-bound", SSH_PUBKEY_AUTH_HBOUND },
|
|
{ NULL, -1 }
|
|
};
|
|
static const struct multistate multistate_compression[] = {
|
|
#ifdef WITH_ZLIB
|
|
{ "yes", COMP_ZLIB },
|
|
#endif
|
|
{ "no", COMP_NONE },
|
|
{ NULL, -1 }
|
|
};
|
|
|
|
static int
|
|
parse_multistate_value(const char *arg, const char *filename, int linenum,
|
|
const struct multistate *multistate_ptr)
|
|
{
|
|
int i;
|
|
|
|
if (!arg || *arg == '\0') {
|
|
error("%s line %d: missing argument.", filename, linenum);
|
|
return -1;
|
|
}
|
|
for (i = 0; multistate_ptr[i].key != NULL; i++) {
|
|
if (strcasecmp(arg, multistate_ptr[i].key) == 0)
|
|
return multistate_ptr[i].value;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Processes a single option line as used in the configuration files. This
|
|
* only sets those values that have not already been set.
|
|
*/
|
|
int
|
|
process_config_line(Options *options, struct passwd *pw, const char *host,
|
|
const char *original_host, char *line, const char *filename,
|
|
int linenum, int *activep, int flags)
|
|
{
|
|
return process_config_line_depth(options, pw, host, original_host,
|
|
line, filename, linenum, activep, flags, NULL, 0);
|
|
}
|
|
|
|
#define WHITESPACE " \t\r\n"
|
|
static int
|
|
process_config_line_depth(Options *options, struct passwd *pw, const char *host,
|
|
const char *original_host, char *line, const char *filename,
|
|
int linenum, int *activep, int flags, int *want_final_pass, int depth)
|
|
{
|
|
char *str, **charptr, *endofnumber, *keyword, *arg, *arg2, *p;
|
|
char **cpptr, ***cppptr, fwdarg[256];
|
|
u_int i, *uintptr, uvalue, max_entries = 0;
|
|
int r, oactive, negated, opcode, *intptr, value, value2, cmdline = 0;
|
|
int remotefwd, dynamicfwd;
|
|
LogLevel *log_level_ptr;
|
|
SyslogFacility *log_facility_ptr;
|
|
long long val64;
|
|
size_t len;
|
|
struct Forward fwd;
|
|
const struct multistate *multistate_ptr;
|
|
struct allowed_cname *cname;
|
|
glob_t gl;
|
|
const char *errstr;
|
|
char **oav = NULL, **av;
|
|
int oac = 0, ac;
|
|
int ret = -1;
|
|
|
|
if (activep == NULL) { /* We are processing a command line directive */
|
|
cmdline = 1;
|
|
activep = &cmdline;
|
|
}
|
|
|
|
/* Strip trailing whitespace. Allow \f (form feed) at EOL only */
|
|
if ((len = strlen(line)) == 0)
|
|
return 0;
|
|
for (len--; len > 0; len--) {
|
|
if (strchr(WHITESPACE "\f", line[len]) == NULL)
|
|
break;
|
|
line[len] = '\0';
|
|
}
|
|
|
|
str = line;
|
|
/* Get the keyword. (Each line is supposed to begin with a keyword). */
|
|
if ((keyword = strdelim(&str)) == NULL)
|
|
return 0;
|
|
/* Ignore leading whitespace. */
|
|
if (*keyword == '\0')
|
|
keyword = strdelim(&str);
|
|
if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
|
|
return 0;
|
|
/* Match lowercase keyword */
|
|
lowercase(keyword);
|
|
|
|
/* Prepare to parse remainder of line */
|
|
if (str != NULL)
|
|
str += strspn(str, WHITESPACE);
|
|
if (str == NULL || *str == '\0') {
|
|
error("%s line %d: no argument after keyword \"%s\"",
|
|
filename, linenum, keyword);
|
|
return -1;
|
|
}
|
|
opcode = parse_token(keyword, filename, linenum,
|
|
options->ignored_unknown);
|
|
if (argv_split(str, &oac, &oav, 1) != 0) {
|
|
error("%s line %d: invalid quotes", filename, linenum);
|
|
return -1;
|
|
}
|
|
ac = oac;
|
|
av = oav;
|
|
|
|
switch (opcode) {
|
|
case oBadOption:
|
|
/* don't panic, but count bad options */
|
|
goto out;
|
|
case oIgnore:
|
|
argv_consume(&ac);
|
|
break;
|
|
case oIgnoredUnknownOption:
|
|
debug("%s line %d: Ignored unknown option \"%s\"",
|
|
filename, linenum, keyword);
|
|
argv_consume(&ac);
|
|
break;
|
|
case oConnectTimeout:
|
|
intptr = &options->connection_timeout;
|
|
parse_time:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%s line %d: missing time value.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (strcmp(arg, "none") == 0)
|
|
value = -1;
|
|
else if ((value = convtime(arg)) == -1) {
|
|
error("%s line %d: invalid time value.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case oForwardAgent:
|
|
intptr = &options->forward_agent;
|
|
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%s line %d: missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
|
|
value = -1;
|
|
multistate_ptr = multistate_flag;
|
|
for (i = 0; multistate_ptr[i].key != NULL; i++) {
|
|
if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
|
|
value = multistate_ptr[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (value != -1) {
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
}
|
|
/* ForwardAgent wasn't 'yes' or 'no', assume a path */
|
|
if (*activep && *intptr == -1)
|
|
*intptr = 1;
|
|
|
|
charptr = &options->forward_agent_sock_path;
|
|
goto parse_agent_path;
|
|
|
|
case oForwardX11:
|
|
intptr = &options->forward_x11;
|
|
parse_flag:
|
|
multistate_ptr = multistate_flag;
|
|
parse_multistate:
|
|
arg = argv_next(&ac, &av);
|
|
if ((value = parse_multistate_value(arg, filename, linenum,
|
|
multistate_ptr)) == -1) {
|
|
error("%s line %d: unsupported option \"%s\".",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case oForwardX11Trusted:
|
|
intptr = &options->forward_x11_trusted;
|
|
goto parse_flag;
|
|
|
|
case oForwardX11Timeout:
|
|
intptr = &options->forward_x11_timeout;
|
|
goto parse_time;
|
|
|
|
case oGatewayPorts:
|
|
intptr = &options->fwd_opts.gateway_ports;
|
|
goto parse_flag;
|
|
|
|
case oExitOnForwardFailure:
|
|
intptr = &options->exit_on_forward_failure;
|
|
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:
|
|
multistate_ptr = multistate_pubkey_auth;
|
|
intptr = &options->pubkey_authentication;
|
|
goto parse_multistate;
|
|
|
|
case oHostbasedAuthentication:
|
|
intptr = &options->hostbased_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;
|
|
multistate_ptr = multistate_yesnoask;
|
|
goto parse_multistate;
|
|
|
|
case oStrictHostKeyChecking:
|
|
intptr = &options->strict_host_key_checking;
|
|
multistate_ptr = multistate_strict_hostkey;
|
|
goto parse_multistate;
|
|
|
|
case oCompression:
|
|
intptr = &options->compression;
|
|
multistate_ptr = multistate_compression;
|
|
goto parse_multistate;
|
|
|
|
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 oRekeyLimit:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.", filename,
|
|
linenum);
|
|
goto out;
|
|
}
|
|
if (strcmp(arg, "default") == 0) {
|
|
val64 = 0;
|
|
} else {
|
|
if (scan_scaled(arg, &val64) == -1) {
|
|
error("%.200s line %d: Bad number '%s': %s",
|
|
filename, linenum, arg, strerror(errno));
|
|
goto out;
|
|
}
|
|
if (val64 != 0 && val64 < 16) {
|
|
error("%.200s line %d: RekeyLimit too small",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
}
|
|
if (*activep && options->rekey_limit == -1)
|
|
options->rekey_limit = val64;
|
|
if (ac != 0) { /* optional rekey interval present */
|
|
if (strcmp(av[0], "none") == 0) {
|
|
(void)argv_next(&ac, &av); /* discard */
|
|
break;
|
|
}
|
|
intptr = &options->rekey_interval;
|
|
goto parse_time;
|
|
}
|
|
break;
|
|
|
|
case oIdentityFile:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep) {
|
|
intptr = &options->num_identity_files;
|
|
if (*intptr >= SSH_MAX_IDENTITY_FILES) {
|
|
error("%.200s line %d: Too many identity files "
|
|
"specified (max %d).", filename, linenum,
|
|
SSH_MAX_IDENTITY_FILES);
|
|
goto out;
|
|
}
|
|
add_identity_file(options, NULL,
|
|
arg, flags & SSHCONF_USERCONF);
|
|
}
|
|
break;
|
|
|
|
case oCertificateFile:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep) {
|
|
intptr = &options->num_certificate_files;
|
|
if (*intptr >= SSH_MAX_CERTIFICATE_FILES) {
|
|
error("%.200s line %d: Too many certificate "
|
|
"files specified (max %d).",
|
|
filename, linenum,
|
|
SSH_MAX_CERTIFICATE_FILES);
|
|
goto out;
|
|
}
|
|
add_certificate_file(options, arg,
|
|
flags & SSHCONF_USERCONF);
|
|
}
|
|
break;
|
|
|
|
case oXAuthLocation:
|
|
charptr=&options->xauth_location;
|
|
goto parse_string;
|
|
|
|
case oUser:
|
|
charptr = &options->user;
|
|
parse_string:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case oGlobalKnownHostsFile:
|
|
cpptr = (char **)&options->system_hostfiles;
|
|
uintptr = &options->num_system_hostfiles;
|
|
max_entries = SSH_MAX_HOSTS_FILES;
|
|
parse_char_array:
|
|
i = 0;
|
|
value = *uintptr == 0; /* was array empty when we started? */
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
/* Allow "none" only in first position */
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
}
|
|
i++;
|
|
if (*activep && value) {
|
|
if ((*uintptr) >= max_entries) {
|
|
error("%s line %d: too many %s "
|
|
"entries.", filename, linenum,
|
|
keyword);
|
|
goto out;
|
|
}
|
|
cpptr[(*uintptr)++] = xstrdup(arg);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case oUserKnownHostsFile:
|
|
cpptr = (char **)&options->user_hostfiles;
|
|
uintptr = &options->num_user_hostfiles;
|
|
max_entries = SSH_MAX_HOSTS_FILES;
|
|
goto parse_char_array;
|
|
|
|
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 oBindInterface:
|
|
charptr = &options->bind_interface;
|
|
goto parse_string;
|
|
|
|
case oPKCS11Provider:
|
|
charptr = &options->pkcs11_provider;
|
|
goto parse_string;
|
|
|
|
case oSecurityKeyProvider:
|
|
charptr = &options->sk_provider;
|
|
goto parse_string;
|
|
|
|
case oKnownHostsCommand:
|
|
charptr = &options->known_hosts_command;
|
|
goto parse_command;
|
|
|
|
case oProxyCommand:
|
|
charptr = &options->proxy_command;
|
|
/* Ignore ProxyCommand if ProxyJump already specified */
|
|
if (options->jump_host != NULL)
|
|
charptr = &options->jump_host; /* Skip below */
|
|
parse_command:
|
|
if (str == NULL) {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
len = strspn(str, WHITESPACE "=");
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(str + len);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case oProxyJump:
|
|
if (str == NULL) {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
len = strspn(str, WHITESPACE "=");
|
|
/* XXX use argv? */
|
|
if (parse_jump(str + len, options, *activep) == -1) {
|
|
error("%.200s line %d: Invalid ProxyJump \"%s\"",
|
|
filename, linenum, str + len);
|
|
goto out;
|
|
}
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case oPort:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
value = a2port(arg);
|
|
if (value <= 0) {
|
|
error("%.200s line %d: Bad port '%s'.",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (*activep && options->port == -1)
|
|
options->port = value;
|
|
break;
|
|
|
|
case oConnectionAttempts:
|
|
intptr = &options->connection_attempts;
|
|
parse_int:
|
|
arg = argv_next(&ac, &av);
|
|
if ((errstr = atoi_err(arg, &value)) != NULL) {
|
|
error("%s line %d: integer value %s.",
|
|
filename, linenum, errstr);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case oCiphers:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*arg != '-' &&
|
|
!ciphers_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)){
|
|
error("%.200s line %d: Bad SSH2 cipher spec '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*activep && options->ciphers == NULL)
|
|
options->ciphers = xstrdup(arg);
|
|
break;
|
|
|
|
case oMacs:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*arg != '-' &&
|
|
!mac_valid(*arg == '+' || *arg == '^' ? arg + 1 : arg)) {
|
|
error("%.200s line %d: Bad SSH2 MAC spec '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*activep && options->macs == NULL)
|
|
options->macs = xstrdup(arg);
|
|
break;
|
|
|
|
case oKexAlgorithms:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*arg != '-' &&
|
|
!kex_names_valid(*arg == '+' || *arg == '^' ?
|
|
arg + 1 : arg)) {
|
|
error("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*activep && options->kex_algorithms == NULL)
|
|
options->kex_algorithms = xstrdup(arg);
|
|
break;
|
|
|
|
case oHostKeyAlgorithms:
|
|
charptr = &options->hostkeyalgorithms;
|
|
parse_pubkey_algos:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*arg != '-' &&
|
|
!sshkey_names_valid2(*arg == '+' || *arg == '^' ?
|
|
arg + 1 : arg, 1)) {
|
|
error("%s line %d: Bad key types '%s'.",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case oCASignatureAlgorithms:
|
|
charptr = &options->ca_sign_algorithms;
|
|
goto parse_pubkey_algos;
|
|
|
|
case oLogLevel:
|
|
log_level_ptr = &options->log_level;
|
|
arg = argv_next(&ac, &av);
|
|
value = log_level_number(arg);
|
|
if (value == SYSLOG_LEVEL_NOT_SET) {
|
|
error("%.200s line %d: unsupported log level '%s'",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
|
|
*log_level_ptr = (LogLevel) value;
|
|
break;
|
|
|
|
case oLogFacility:
|
|
log_facility_ptr = &options->log_facility;
|
|
arg = argv_next(&ac, &av);
|
|
value = log_facility_number(arg);
|
|
if (value == SYSLOG_FACILITY_NOT_SET) {
|
|
error("%.200s line %d: unsupported log facility '%s'",
|
|
filename, linenum, arg ? arg : "<NONE>");
|
|
goto out;
|
|
}
|
|
if (*log_facility_ptr == -1)
|
|
*log_facility_ptr = (SyslogFacility) value;
|
|
break;
|
|
|
|
case oLogVerbose:
|
|
cppptr = &options->log_verbose;
|
|
uintptr = &options->num_log_verbose;
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
/* Allow "none" only in first position */
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
}
|
|
i++;
|
|
if (*activep && *uintptr == 0) {
|
|
*cppptr = xrecallocarray(*cppptr, *uintptr,
|
|
*uintptr + 1, sizeof(**cppptr));
|
|
(*cppptr)[(*uintptr)++] = xstrdup(arg);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case oLocalForward:
|
|
case oRemoteForward:
|
|
case oDynamicForward:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
|
|
remotefwd = (opcode == oRemoteForward);
|
|
dynamicfwd = (opcode == oDynamicForward);
|
|
|
|
if (!dynamicfwd) {
|
|
arg2 = argv_next(&ac, &av);
|
|
if (arg2 == NULL || *arg2 == '\0') {
|
|
if (remotefwd)
|
|
dynamicfwd = 1;
|
|
else {
|
|
error("%.200s line %d: Missing target "
|
|
"argument.", filename, linenum);
|
|
goto out;
|
|
}
|
|
} else {
|
|
/* construct a string for parse_forward */
|
|
snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg,
|
|
arg2);
|
|
}
|
|
}
|
|
if (dynamicfwd)
|
|
strlcpy(fwdarg, arg, sizeof(fwdarg));
|
|
|
|
if (parse_forward(&fwd, fwdarg, dynamicfwd, remotefwd) == 0) {
|
|
error("%.200s line %d: Bad forwarding specification.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
|
|
if (*activep) {
|
|
if (remotefwd) {
|
|
add_remote_forward(options, &fwd);
|
|
} else {
|
|
add_local_forward(options, &fwd);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case oPermitRemoteOpen:
|
|
uintptr = &options->num_permitted_remote_opens;
|
|
cppptr = &options->permitted_remote_opens;
|
|
uvalue = *uintptr; /* modified later */
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
arg2 = xstrdup(arg);
|
|
/* Allow any/none only in first position */
|
|
if (strcasecmp(arg, "none") == 0 ||
|
|
strcasecmp(arg, "any") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"%s\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword, arg);
|
|
goto out;
|
|
}
|
|
} else {
|
|
p = hpdelim(&arg);
|
|
if (p == NULL) {
|
|
fatal("%s line %d: missing host in %s",
|
|
filename, linenum,
|
|
lookup_opcode_name(opcode));
|
|
}
|
|
p = cleanhostname(p);
|
|
/*
|
|
* don't want to use permitopen_port to avoid
|
|
* dependency on channels.[ch] here.
|
|
*/
|
|
if (arg == NULL || (strcmp(arg, "*") != 0 &&
|
|
a2port(arg) <= 0)) {
|
|
fatal("%s line %d: bad port number "
|
|
"in %s", filename, linenum,
|
|
lookup_opcode_name(opcode));
|
|
}
|
|
}
|
|
if (*activep && uvalue == 0) {
|
|
opt_array_append(filename, linenum,
|
|
lookup_opcode_name(opcode),
|
|
cppptr, uintptr, arg2);
|
|
}
|
|
free(arg2);
|
|
i++;
|
|
}
|
|
if (i == 0)
|
|
fatal("%s line %d: missing %s specification",
|
|
filename, linenum, lookup_opcode_name(opcode));
|
|
break;
|
|
|
|
case oClearAllForwardings:
|
|
intptr = &options->clear_forwardings;
|
|
goto parse_flag;
|
|
|
|
case oHost:
|
|
if (cmdline) {
|
|
error("Host directive not supported as a command-line "
|
|
"option");
|
|
goto out;
|
|
}
|
|
*activep = 0;
|
|
arg2 = NULL;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
if ((flags & SSHCONF_NEVERMATCH) != 0) {
|
|
argv_consume(&ac);
|
|
break;
|
|
}
|
|
negated = *arg == '!';
|
|
if (negated)
|
|
arg++;
|
|
if (match_pattern(host, arg)) {
|
|
if (negated) {
|
|
debug("%.200s line %d: Skipping Host "
|
|
"block because of negated match "
|
|
"for %.100s", filename, linenum,
|
|
arg);
|
|
*activep = 0;
|
|
argv_consume(&ac);
|
|
break;
|
|
}
|
|
if (!*activep)
|
|
arg2 = arg; /* logged below */
|
|
*activep = 1;
|
|
}
|
|
}
|
|
if (*activep)
|
|
debug("%.200s line %d: Applying options for %.100s",
|
|
filename, linenum, arg2);
|
|
break;
|
|
|
|
case oMatch:
|
|
if (cmdline) {
|
|
error("Host directive not supported as a command-line "
|
|
"option");
|
|
goto out;
|
|
}
|
|
value = match_cfg_line(options, &str, pw, host, original_host,
|
|
flags & SSHCONF_FINAL, want_final_pass,
|
|
filename, linenum);
|
|
if (value < 0) {
|
|
error("%.200s line %d: Bad Match condition", filename,
|
|
linenum);
|
|
goto out;
|
|
}
|
|
*activep = (flags & SSHCONF_NEVERMATCH) ? 0 : value;
|
|
/*
|
|
* If match_cfg_line() didn't consume all its arguments then
|
|
* arrange for the extra arguments check below to fail.
|
|
*/
|
|
|
|
if (str == NULL || *str == '\0')
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case oEscapeChar:
|
|
intptr = &options->escape_char;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (strcmp(arg, "none") == 0)
|
|
value = SSH_ESCAPECHAR_NONE;
|
|
else if (arg[1] == '\0')
|
|
value = (u_char) arg[0];
|
|
else if (arg[0] == '^' && arg[2] == 0 &&
|
|
(u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
|
|
value = (u_char) arg[1] & 31;
|
|
else {
|
|
error("%.200s line %d: Bad escape character.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case oAddressFamily:
|
|
intptr = &options->address_family;
|
|
multistate_ptr = multistate_addressfamily;
|
|
goto parse_multistate;
|
|
|
|
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 = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0' || strchr(arg, '=') != NULL) {
|
|
error("%s line %d: Invalid environment name.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (!*activep)
|
|
continue;
|
|
if (*arg == '-') {
|
|
/* Removing an env var */
|
|
rm_env(options, arg, filename, linenum);
|
|
continue;
|
|
}
|
|
opt_array_append(filename, linenum,
|
|
lookup_opcode_name(opcode),
|
|
&options->send_env, &options->num_send_env, arg);
|
|
}
|
|
break;
|
|
|
|
case oSetEnv:
|
|
value = options->num_setenv;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (strchr(arg, '=') == NULL) {
|
|
error("%s line %d: Invalid SetEnv.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (!*activep || value != 0)
|
|
continue;
|
|
if (lookup_setenv_in_list(arg, options->setenv,
|
|
options->num_setenv) != NULL) {
|
|
debug2("%s line %d: ignoring duplicate env "
|
|
"name \"%.64s\"", filename, linenum, arg);
|
|
continue;
|
|
}
|
|
opt_array_append(filename, linenum,
|
|
lookup_opcode_name(opcode),
|
|
&options->setenv, &options->num_setenv, arg);
|
|
}
|
|
break;
|
|
|
|
case oControlPath:
|
|
charptr = &options->control_path;
|
|
goto parse_string;
|
|
|
|
case oControlMaster:
|
|
intptr = &options->control_master;
|
|
multistate_ptr = multistate_controlmaster;
|
|
goto parse_multistate;
|
|
|
|
case oControlPersist:
|
|
/* no/false/yes/true, or a time spec */
|
|
intptr = &options->control_persist;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing ControlPersist"
|
|
" argument.", filename, linenum);
|
|
goto out;
|
|
}
|
|
value = 0;
|
|
value2 = 0; /* timeout */
|
|
if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
|
|
value = 0;
|
|
else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
|
|
value = 1;
|
|
else if ((value2 = convtime(arg)) >= 0)
|
|
value = 1;
|
|
else {
|
|
error("%.200s line %d: Bad ControlPersist argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1) {
|
|
*intptr = value;
|
|
options->control_persist_timeout = value2;
|
|
}
|
|
break;
|
|
|
|
case oHashKnownHosts:
|
|
intptr = &options->hash_known_hosts;
|
|
goto parse_flag;
|
|
|
|
case oTunnel:
|
|
intptr = &options->tun_open;
|
|
multistate_ptr = multistate_tunnel;
|
|
goto parse_multistate;
|
|
|
|
case oTunnelDevice:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
value = a2tun(arg, &value2);
|
|
if (value == SSH_TUNID_ERR) {
|
|
error("%.200s line %d: Bad tun device.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && options->tun_local == -1) {
|
|
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 oRemoteCommand:
|
|
charptr = &options->remote_command;
|
|
goto parse_command;
|
|
|
|
case oVisualHostKey:
|
|
intptr = &options->visual_host_key;
|
|
goto parse_flag;
|
|
|
|
case oInclude:
|
|
if (cmdline) {
|
|
error("Include directive not supported as a "
|
|
"command-line option");
|
|
goto out;
|
|
}
|
|
value = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Ensure all paths are anchored. User configuration
|
|
* files may begin with '~/' but system configurations
|
|
* must not. If the path is relative, then treat it
|
|
* as living in ~/.ssh for user configurations or
|
|
* /etc/ssh for system ones.
|
|
*/
|
|
if (*arg == '~' && (flags & SSHCONF_USERCONF) == 0) {
|
|
error("%.200s line %d: bad include path %s.",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (!path_absolute(arg) && *arg != '~') {
|
|
xasprintf(&arg2, "%s/%s",
|
|
(flags & SSHCONF_USERCONF) ?
|
|
"~/" _PATH_SSH_USER_DIR : SSHDIR, arg);
|
|
} else
|
|
arg2 = xstrdup(arg);
|
|
memset(&gl, 0, sizeof(gl));
|
|
r = glob(arg2, GLOB_TILDE, NULL, &gl);
|
|
if (r == GLOB_NOMATCH) {
|
|
debug("%.200s line %d: include %s matched no "
|
|
"files",filename, linenum, arg2);
|
|
free(arg2);
|
|
continue;
|
|
} else if (r != 0) {
|
|
error("%.200s line %d: glob failed for %s.",
|
|
filename, linenum, arg2);
|
|
goto out;
|
|
}
|
|
free(arg2);
|
|
oactive = *activep;
|
|
for (i = 0; i < gl.gl_pathc; i++) {
|
|
debug3("%.200s line %d: Including file %s "
|
|
"depth %d%s", filename, linenum,
|
|
gl.gl_pathv[i], depth,
|
|
oactive ? "" : " (parse only)");
|
|
r = read_config_file_depth(gl.gl_pathv[i],
|
|
pw, host, original_host, options,
|
|
flags | SSHCONF_CHECKPERM |
|
|
(oactive ? 0 : SSHCONF_NEVERMATCH),
|
|
activep, want_final_pass, depth + 1);
|
|
if (r != 1 && errno != ENOENT) {
|
|
error("Can't open user config file "
|
|
"%.100s: %.100s", gl.gl_pathv[i],
|
|
strerror(errno));
|
|
globfree(&gl);
|
|
goto out;
|
|
}
|
|
/*
|
|
* don't let Match in includes clobber the
|
|
* containing file's Match state.
|
|
*/
|
|
*activep = oactive;
|
|
if (r != 1)
|
|
value = -1;
|
|
}
|
|
globfree(&gl);
|
|
}
|
|
if (value != 0)
|
|
ret = value;
|
|
break;
|
|
|
|
case oIPQoS:
|
|
arg = argv_next(&ac, &av);
|
|
if ((value = parse_ipqos(arg)) == -1) {
|
|
error("%s line %d: Bad IPQoS value: %s",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
arg = argv_next(&ac, &av);
|
|
if (arg == NULL)
|
|
value2 = value;
|
|
else if ((value2 = parse_ipqos(arg)) == -1) {
|
|
error("%s line %d: Bad IPQoS value: %s",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (*activep && options->ip_qos_interactive == -1) {
|
|
options->ip_qos_interactive = value;
|
|
options->ip_qos_bulk = value2;
|
|
}
|
|
break;
|
|
|
|
case oRequestTTY:
|
|
intptr = &options->request_tty;
|
|
multistate_ptr = multistate_requesttty;
|
|
goto parse_multistate;
|
|
|
|
case oSessionType:
|
|
intptr = &options->session_type;
|
|
multistate_ptr = multistate_sessiontype;
|
|
goto parse_multistate;
|
|
|
|
case oStdinNull:
|
|
intptr = &options->stdin_null;
|
|
goto parse_flag;
|
|
|
|
case oForkAfterAuthentication:
|
|
intptr = &options->fork_after_authentication;
|
|
goto parse_flag;
|
|
|
|
case oIgnoreUnknown:
|
|
charptr = &options->ignored_unknown;
|
|
goto parse_string;
|
|
|
|
case oProxyUseFdpass:
|
|
intptr = &options->proxy_use_fdpass;
|
|
goto parse_flag;
|
|
|
|
case oCanonicalDomains:
|
|
value = options->num_canonical_domains != 0;
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
if (*arg == '\0') {
|
|
error("%s line %d: keyword %s empty argument",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
/* Allow "none" only in first position */
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
}
|
|
i++;
|
|
if (!valid_domain(arg, 1, &errstr)) {
|
|
error("%s line %d: %s", filename, linenum,
|
|
errstr);
|
|
goto out;
|
|
}
|
|
if (!*activep || value)
|
|
continue;
|
|
if (options->num_canonical_domains >=
|
|
MAX_CANON_DOMAINS) {
|
|
error("%s line %d: too many hostname suffixes.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
options->canonical_domains[
|
|
options->num_canonical_domains++] = xstrdup(arg);
|
|
}
|
|
break;
|
|
|
|
case oCanonicalizePermittedCNAMEs:
|
|
value = options->num_permitted_cnames != 0;
|
|
i = 0;
|
|
while ((arg = argv_next(&ac, &av)) != NULL) {
|
|
/*
|
|
* Either 'none' (only in first position), '*' for
|
|
* everything or 'list:list'
|
|
*/
|
|
if (strcasecmp(arg, "none") == 0) {
|
|
if (i > 0 || ac > 0) {
|
|
error("%s line %d: keyword %s \"none\" "
|
|
"argument must appear alone.",
|
|
filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
arg2 = "";
|
|
} else if (strcmp(arg, "*") == 0) {
|
|
arg2 = arg;
|
|
} else {
|
|
lowercase(arg);
|
|
if ((arg2 = strchr(arg, ':')) == NULL ||
|
|
arg2[1] == '\0') {
|
|
error("%s line %d: "
|
|
"Invalid permitted CNAME \"%s\"",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
*arg2 = '\0';
|
|
arg2++;
|
|
}
|
|
i++;
|
|
if (!*activep || value)
|
|
continue;
|
|
if (options->num_permitted_cnames >=
|
|
MAX_CANON_DOMAINS) {
|
|
error("%s line %d: too many permitted CNAMEs.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
cname = options->permitted_cnames +
|
|
options->num_permitted_cnames++;
|
|
cname->source_list = xstrdup(arg);
|
|
cname->target_list = xstrdup(arg2);
|
|
}
|
|
break;
|
|
|
|
case oCanonicalizeHostname:
|
|
intptr = &options->canonicalize_hostname;
|
|
multistate_ptr = multistate_canonicalizehostname;
|
|
goto parse_multistate;
|
|
|
|
case oCanonicalizeMaxDots:
|
|
intptr = &options->canonicalize_max_dots;
|
|
goto parse_int;
|
|
|
|
case oCanonicalizeFallbackLocal:
|
|
intptr = &options->canonicalize_fallback_local;
|
|
goto parse_flag;
|
|
|
|
case oStreamLocalBindMask:
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing StreamLocalBindMask "
|
|
"argument.", filename, linenum);
|
|
goto out;
|
|
}
|
|
/* Parse mode in octal format */
|
|
value = strtol(arg, &endofnumber, 8);
|
|
if (arg == endofnumber || value < 0 || value > 0777) {
|
|
error("%.200s line %d: Bad mask.", filename, linenum);
|
|
goto out;
|
|
}
|
|
options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
|
|
break;
|
|
|
|
case oStreamLocalBindUnlink:
|
|
intptr = &options->fwd_opts.streamlocal_bind_unlink;
|
|
goto parse_flag;
|
|
|
|
case oRevokedHostKeys:
|
|
charptr = &options->revoked_host_keys;
|
|
goto parse_string;
|
|
|
|
case oFingerprintHash:
|
|
intptr = &options->fingerprint_hash;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if ((value = ssh_digest_alg_by_name(arg)) == -1) {
|
|
error("%.200s line %d: Invalid hash algorithm \"%s\".",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (*activep && *intptr == -1)
|
|
*intptr = value;
|
|
break;
|
|
|
|
case oUpdateHostkeys:
|
|
intptr = &options->update_hostkeys;
|
|
multistate_ptr = multistate_yesnoask;
|
|
goto parse_multistate;
|
|
|
|
case oHostbasedAcceptedAlgorithms:
|
|
charptr = &options->hostbased_accepted_algos;
|
|
goto parse_pubkey_algos;
|
|
|
|
case oPubkeyAcceptedAlgorithms:
|
|
charptr = &options->pubkey_accepted_algos;
|
|
goto parse_pubkey_algos;
|
|
|
|
case oAddKeysToAgent:
|
|
arg = argv_next(&ac, &av);
|
|
arg2 = argv_next(&ac, &av);
|
|
value = parse_multistate_value(arg, filename, linenum,
|
|
multistate_yesnoaskconfirm);
|
|
value2 = 0; /* unlimited lifespan by default */
|
|
if (value == 3 && arg2 != NULL) {
|
|
/* allow "AddKeysToAgent confirm 5m" */
|
|
if ((value2 = convtime(arg2)) == -1 ||
|
|
value2 > INT_MAX) {
|
|
error("%s line %d: invalid time value.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
} else if (value == -1 && arg2 == NULL) {
|
|
if ((value2 = convtime(arg)) == -1 ||
|
|
value2 > INT_MAX) {
|
|
error("%s line %d: unsupported option",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
value = 1; /* yes */
|
|
} else if (value == -1 || arg2 != NULL) {
|
|
error("%s line %d: unsupported option",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
if (*activep && options->add_keys_to_agent == -1) {
|
|
options->add_keys_to_agent = value;
|
|
options->add_keys_to_agent_lifespan = value2;
|
|
}
|
|
break;
|
|
|
|
case oIdentityAgent:
|
|
charptr = &options->identity_agent;
|
|
arg = argv_next(&ac, &av);
|
|
if (!arg || *arg == '\0') {
|
|
error("%.200s line %d: Missing argument.",
|
|
filename, linenum);
|
|
goto out;
|
|
}
|
|
parse_agent_path:
|
|
/* Extra validation if the string represents an env var. */
|
|
if ((arg2 = dollar_expand(&r, arg)) == NULL || r) {
|
|
error("%.200s line %d: Invalid environment expansion "
|
|
"%s.", filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
free(arg2);
|
|
/* check for legacy environment format */
|
|
if (arg[0] == '$' && arg[1] != '{' &&
|
|
!valid_env_name(arg + 1)) {
|
|
error("%.200s line %d: Invalid environment name %s.",
|
|
filename, linenum, arg);
|
|
goto out;
|
|
}
|
|
if (*activep && *charptr == NULL)
|
|
*charptr = xstrdup(arg);
|
|
break;
|
|
|
|
case oEnableEscapeCommandline:
|
|
intptr = &options->enable_escape_commandline;
|
|
goto parse_flag;
|
|
|
|
case oRequiredRSASize:
|
|
intptr = &options->required_rsa_size;
|
|
goto parse_int;
|
|
|
|
case oDeprecated:
|
|
debug("%s line %d: Deprecated option \"%s\"",
|
|
filename, linenum, keyword);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
case oUnsupported:
|
|
error("%s line %d: Unsupported option \"%s\"",
|
|
filename, linenum, keyword);
|
|
argv_consume(&ac);
|
|
break;
|
|
|
|
default:
|
|
error("%s line %d: Unimplemented opcode %d",
|
|
filename, linenum, opcode);
|
|
goto out;
|
|
}
|
|
|
|
/* Check that there is no garbage at end of line. */
|
|
if (ac > 0) {
|
|
error("%.200s line %d: keyword %s extra arguments "
|
|
"at end of line", filename, linenum, keyword);
|
|
goto out;
|
|
}
|
|
|
|
/* success */
|
|
ret = 0;
|
|
out:
|
|
argv_free(oav, oac);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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, struct passwd *pw, const char *host,
|
|
const char *original_host, Options *options, int flags,
|
|
int *want_final_pass)
|
|
{
|
|
int active = 1;
|
|
|
|
return read_config_file_depth(filename, pw, host, original_host,
|
|
options, flags, &active, want_final_pass, 0);
|
|
}
|
|
|
|
#define READCONF_MAX_DEPTH 16
|
|
static int
|
|
read_config_file_depth(const char *filename, struct passwd *pw,
|
|
const char *host, const char *original_host, Options *options,
|
|
int flags, int *activep, int *want_final_pass, int depth)
|
|
{
|
|
FILE *f;
|
|
char *line = NULL;
|
|
size_t linesize = 0;
|
|
int linenum;
|
|
int bad_options = 0;
|
|
|
|
if (depth < 0 || depth > READCONF_MAX_DEPTH)
|
|
fatal("Too many recursive configuration includes");
|
|
|
|
if ((f = fopen(filename, "r")) == NULL)
|
|
return 0;
|
|
|
|
if (flags & SSHCONF_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.
|
|
*/
|
|
linenum = 0;
|
|
while (getline(&line, &linesize, f) != -1) {
|
|
/* Update line number counter. */
|
|
linenum++;
|
|
/*
|
|
* Trim out comments and strip whitespace.
|
|
* NB - preserve newlines, they are needed to reproduce
|
|
* line numbers later for error messages.
|
|
*/
|
|
if (process_config_line_depth(options, pw, host, original_host,
|
|
line, filename, linenum, activep, flags, want_final_pass,
|
|
depth) != 0)
|
|
bad_options++;
|
|
}
|
|
free(line);
|
|
fclose(f);
|
|
if (bad_options > 0)
|
|
fatal("%s: terminating, %d bad configuration options",
|
|
filename, bad_options);
|
|
return 1;
|
|
}
|
|
|
|
/* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
|
|
int
|
|
option_clear_or_none(const char *o)
|
|
{
|
|
return o == NULL || strcasecmp(o, "none") == 0;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if CanonicalizePermittedCNAMEs have been specified, 0 otherwise.
|
|
* Allowed to be called on non-final configuration.
|
|
*/
|
|
int
|
|
config_has_permitted_cnames(Options *options)
|
|
{
|
|
if (options->num_permitted_cnames == 1 &&
|
|
strcasecmp(options->permitted_cnames[0].source_list, "none") == 0 &&
|
|
strcmp(options->permitted_cnames[0].target_list, "") == 0)
|
|
return 0;
|
|
return options->num_permitted_cnames > 0;
|
|
}
|
|
|
|
/*
|
|
* 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->host_arg = NULL;
|
|
options->forward_agent = -1;
|
|
options->forward_agent_sock_path = NULL;
|
|
options->forward_x11 = -1;
|
|
options->forward_x11_trusted = -1;
|
|
options->forward_x11_timeout = -1;
|
|
options->stdio_forward_host = NULL;
|
|
options->stdio_forward_port = 0;
|
|
options->clear_forwardings = -1;
|
|
options->exit_on_forward_failure = -1;
|
|
options->xauth_location = NULL;
|
|
options->fwd_opts.gateway_ports = -1;
|
|
options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
|
|
options->fwd_opts.streamlocal_bind_unlink = -1;
|
|
options->pubkey_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->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->port = -1;
|
|
options->address_family = -1;
|
|
options->connection_attempts = -1;
|
|
options->connection_timeout = -1;
|
|
options->number_of_password_prompts = -1;
|
|
options->ciphers = NULL;
|
|
options->macs = NULL;
|
|
options->kex_algorithms = NULL;
|
|
options->hostkeyalgorithms = NULL;
|
|
options->ca_sign_algorithms = NULL;
|
|
options->num_identity_files = 0;
|
|
memset(options->identity_keys, 0, sizeof(options->identity_keys));
|
|
options->num_certificate_files = 0;
|
|
memset(options->certificates, 0, sizeof(options->certificates));
|
|
options->hostname = NULL;
|
|
options->host_key_alias = NULL;
|
|
options->proxy_command = NULL;
|
|
options->jump_user = NULL;
|
|
options->jump_host = NULL;
|
|
options->jump_port = -1;
|
|
options->jump_extra = NULL;
|
|
options->user = NULL;
|
|
options->escape_char = -1;
|
|
options->num_system_hostfiles = 0;
|
|
options->num_user_hostfiles = 0;
|
|
options->local_forwards = NULL;
|
|
options->num_local_forwards = 0;
|
|
options->remote_forwards = NULL;
|
|
options->num_remote_forwards = 0;
|
|
options->permitted_remote_opens = NULL;
|
|
options->num_permitted_remote_opens = 0;
|
|
options->log_facility = SYSLOG_FACILITY_NOT_SET;
|
|
options->log_level = SYSLOG_LEVEL_NOT_SET;
|
|
options->num_log_verbose = 0;
|
|
options->log_verbose = NULL;
|
|
options->preferred_authentications = NULL;
|
|
options->bind_address = NULL;
|
|
options->bind_interface = NULL;
|
|
options->pkcs11_provider = NULL;
|
|
options->sk_provider = NULL;
|
|
options->enable_ssh_keysign = - 1;
|
|
options->no_host_authentication_for_localhost = - 1;
|
|
options->identities_only = - 1;
|
|
options->rekey_limit = - 1;
|
|
options->rekey_interval = -1;
|
|
options->verify_host_key_dns = -1;
|
|
options->server_alive_interval = -1;
|
|
options->server_alive_count_max = -1;
|
|
options->send_env = NULL;
|
|
options->num_send_env = 0;
|
|
options->setenv = NULL;
|
|
options->num_setenv = 0;
|
|
options->control_path = NULL;
|
|
options->control_master = -1;
|
|
options->control_persist = -1;
|
|
options->control_persist_timeout = 0;
|
|
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->remote_command = NULL;
|
|
options->add_keys_to_agent = -1;
|
|
options->add_keys_to_agent_lifespan = -1;
|
|
options->identity_agent = NULL;
|
|
options->visual_host_key = -1;
|
|
options->ip_qos_interactive = -1;
|
|
options->ip_qos_bulk = -1;
|
|
options->request_tty = -1;
|
|
options->session_type = -1;
|
|
options->stdin_null = -1;
|
|
options->fork_after_authentication = -1;
|
|
options->proxy_use_fdpass = -1;
|
|
options->ignored_unknown = NULL;
|
|
options->num_canonical_domains = 0;
|
|
options->num_permitted_cnames = 0;
|
|
options->canonicalize_max_dots = -1;
|
|
options->canonicalize_fallback_local = -1;
|
|
options->canonicalize_hostname = -1;
|
|
options->revoked_host_keys = NULL;
|
|
options->fingerprint_hash = -1;
|
|
options->update_hostkeys = -1;
|
|
options->hostbased_accepted_algos = NULL;
|
|
options->pubkey_accepted_algos = NULL;
|
|
options->known_hosts_command = NULL;
|
|
options->required_rsa_size = -1;
|
|
options->enable_escape_commandline = -1;
|
|
}
|
|
|
|
/*
|
|
* A petite version of fill_default_options() that just fills the options
|
|
* needed for hostname canonicalization to proceed.
|
|
*/
|
|
void
|
|
fill_default_options_for_canonicalization(Options *options)
|
|
{
|
|
if (options->canonicalize_max_dots == -1)
|
|
options->canonicalize_max_dots = 1;
|
|
if (options->canonicalize_fallback_local == -1)
|
|
options->canonicalize_fallback_local = 1;
|
|
if (options->canonicalize_hostname == -1)
|
|
options->canonicalize_hostname = SSH_CANONICALISE_NO;
|
|
}
|
|
|
|
/*
|
|
* Called after processing other sources of option data, this fills those
|
|
* options for which no value has been specified with their default values.
|
|
*/
|
|
int
|
|
fill_default_options(Options * options)
|
|
{
|
|
char *all_cipher, *all_mac, *all_kex, *all_key, *all_sig;
|
|
char *def_cipher, *def_mac, *def_kex, *def_key, *def_sig;
|
|
int ret = 0, r;
|
|
|
|
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->forward_x11_timeout == -1)
|
|
options->forward_x11_timeout = 1200;
|
|
/*
|
|
* stdio forwarding (-W) changes the default for these but we defer
|
|
* setting the values so they can be overridden.
|
|
*/
|
|
if (options->exit_on_forward_failure == -1)
|
|
options->exit_on_forward_failure =
|
|
options->stdio_forward_host != NULL ? 1 : 0;
|
|
if (options->clear_forwardings == -1)
|
|
options->clear_forwardings =
|
|
options->stdio_forward_host != NULL ? 1 : 0;
|
|
if (options->clear_forwardings == 1)
|
|
clear_forwardings(options);
|
|
|
|
if (options->xauth_location == NULL)
|
|
options->xauth_location = xstrdup(_PATH_XAUTH);
|
|
if (options->fwd_opts.gateway_ports == -1)
|
|
options->fwd_opts.gateway_ports = 0;
|
|
if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
|
|
options->fwd_opts.streamlocal_bind_mask = 0177;
|
|
if (options->fwd_opts.streamlocal_bind_unlink == -1)
|
|
options->fwd_opts.streamlocal_bind_unlink = 0;
|
|
if (options->pubkey_authentication == -1)
|
|
options->pubkey_authentication = SSH_PUBKEY_AUTH_ALL;
|
|
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->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 = 0;
|
|
if (options->strict_host_key_checking == -1)
|
|
options->strict_host_key_checking = SSH_STRICT_HOSTKEY_ASK;
|
|
if (options->compression == -1)
|
|
options->compression = 0;
|
|
if (options->tcp_keep_alive == -1)
|
|
options->tcp_keep_alive = 1;
|
|
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;
|
|
/* options->hostkeyalgorithms, default set in myproposals.h */
|
|
if (options->add_keys_to_agent == -1) {
|
|
options->add_keys_to_agent = 0;
|
|
options->add_keys_to_agent_lifespan = 0;
|
|
}
|
|
if (options->num_identity_files == 0) {
|
|
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
|
|
#ifdef OPENSSL_HAS_ECC
|
|
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
|
|
add_identity_file(options, "~/",
|
|
_PATH_SSH_CLIENT_ID_ECDSA_SK, 0);
|
|
#endif
|
|
add_identity_file(options, "~/",
|
|
_PATH_SSH_CLIENT_ID_ED25519, 0);
|
|
add_identity_file(options, "~/",
|
|
_PATH_SSH_CLIENT_ID_ED25519_SK, 0);
|
|
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_XMSS, 0);
|
|
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_DSA, 0);
|
|
}
|
|
if (options->escape_char == -1)
|
|
options->escape_char = '~';
|
|
if (options->num_system_hostfiles == 0) {
|
|
options->system_hostfiles[options->num_system_hostfiles++] =
|
|
xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
|
|
options->system_hostfiles[options->num_system_hostfiles++] =
|
|
xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
|
|
}
|
|
if (options->update_hostkeys == -1) {
|
|
if (options->verify_host_key_dns <= 0 &&
|
|
(options->num_user_hostfiles == 0 ||
|
|
(options->num_user_hostfiles == 1 && strcmp(options->
|
|
user_hostfiles[0], _PATH_SSH_USER_HOSTFILE) == 0)))
|
|
options->update_hostkeys = SSH_UPDATE_HOSTKEYS_YES;
|
|
else
|
|
options->update_hostkeys = SSH_UPDATE_HOSTKEYS_NO;
|
|
}
|
|
if (options->num_user_hostfiles == 0) {
|
|
options->user_hostfiles[options->num_user_hostfiles++] =
|
|
xstrdup(_PATH_SSH_USER_HOSTFILE);
|
|
options->user_hostfiles[options->num_user_hostfiles++] =
|
|
xstrdup(_PATH_SSH_USER_HOSTFILE2);
|
|
}
|
|
if (options->log_level == SYSLOG_LEVEL_NOT_SET)
|
|
options->log_level = SYSLOG_LEVEL_INFO;
|
|
if (options->log_facility == SYSLOG_FACILITY_NOT_SET)
|
|
options->log_facility = SYSLOG_FACILITY_USER;
|
|
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->rekey_interval == -1)
|
|
options->rekey_interval = 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->control_persist == -1) {
|
|
options->control_persist = 0;
|
|
options->control_persist_timeout = 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->visual_host_key == -1)
|
|
options->visual_host_key = 0;
|
|
if (options->ip_qos_interactive == -1)
|
|
options->ip_qos_interactive = IPTOS_DSCP_AF21;
|
|
if (options->ip_qos_bulk == -1)
|
|
options->ip_qos_bulk = IPTOS_DSCP_CS1;
|
|
if (options->request_tty == -1)
|
|
options->request_tty = REQUEST_TTY_AUTO;
|
|
if (options->session_type == -1)
|
|
options->session_type = SESSION_TYPE_DEFAULT;
|
|
if (options->stdin_null == -1)
|
|
options->stdin_null = 0;
|
|
if (options->fork_after_authentication == -1)
|
|
options->fork_after_authentication = 0;
|
|
if (options->proxy_use_fdpass == -1)
|
|
options->proxy_use_fdpass = 0;
|
|
if (options->canonicalize_max_dots == -1)
|
|
options->canonicalize_max_dots = 1;
|
|
if (options->canonicalize_fallback_local == -1)
|
|
options->canonicalize_fallback_local = 1;
|
|
if (options->canonicalize_hostname == -1)
|
|
options->canonicalize_hostname = SSH_CANONICALISE_NO;
|
|
if (options->fingerprint_hash == -1)
|
|
options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
|
|
#ifdef ENABLE_SK_INTERNAL
|
|
if (options->sk_provider == NULL)
|
|
options->sk_provider = xstrdup("internal");
|
|
#else
|
|
if (options->sk_provider == NULL)
|
|
options->sk_provider = xstrdup("$SSH_SK_PROVIDER");
|
|
#endif
|
|
if (options->required_rsa_size == -1)
|
|
options->required_rsa_size = SSH_RSA_MINIMUM_MODULUS_SIZE;
|
|
if (options->enable_escape_commandline == -1)
|
|
options->enable_escape_commandline = 0;
|
|
|
|
/* Expand KEX name lists */
|
|
all_cipher = cipher_alg_list(',', 0);
|
|
all_mac = mac_alg_list(',');
|
|
all_kex = kex_alg_list(',');
|
|
all_key = sshkey_alg_list(0, 0, 1, ',');
|
|
all_sig = sshkey_alg_list(0, 1, 1, ',');
|
|
/* remove unsupported algos from default lists */
|
|
def_cipher = match_filter_allowlist(KEX_CLIENT_ENCRYPT, all_cipher);
|
|
def_mac = match_filter_allowlist(KEX_CLIENT_MAC, all_mac);
|
|
def_kex = match_filter_allowlist(KEX_CLIENT_KEX, all_kex);
|
|
def_key = match_filter_allowlist(KEX_DEFAULT_PK_ALG, all_key);
|
|
def_sig = match_filter_allowlist(SSH_ALLOWED_CA_SIGALGS, all_sig);
|
|
#define ASSEMBLE(what, defaults, all) \
|
|
do { \
|
|
if ((r = kex_assemble_names(&options->what, \
|
|
defaults, all)) != 0) { \
|
|
error_fr(r, "%s", #what); \
|
|
goto fail; \
|
|
} \
|
|
} while (0)
|
|
ASSEMBLE(ciphers, def_cipher, all_cipher);
|
|
ASSEMBLE(macs, def_mac, all_mac);
|
|
ASSEMBLE(kex_algorithms, def_kex, all_kex);
|
|
ASSEMBLE(hostbased_accepted_algos, def_key, all_key);
|
|
ASSEMBLE(pubkey_accepted_algos, def_key, all_key);
|
|
ASSEMBLE(ca_sign_algorithms, def_sig, all_sig);
|
|
#undef ASSEMBLE
|
|
|
|
#define CLEAR_ON_NONE(v) \
|
|
do { \
|
|
if (option_clear_or_none(v)) { \
|
|
free(v); \
|
|
v = NULL; \
|
|
} \
|
|
} while(0)
|
|
CLEAR_ON_NONE(options->local_command);
|
|
CLEAR_ON_NONE(options->remote_command);
|
|
CLEAR_ON_NONE(options->proxy_command);
|
|
CLEAR_ON_NONE(options->control_path);
|
|
CLEAR_ON_NONE(options->revoked_host_keys);
|
|
CLEAR_ON_NONE(options->pkcs11_provider);
|
|
CLEAR_ON_NONE(options->sk_provider);
|
|
CLEAR_ON_NONE(options->known_hosts_command);
|
|
if (options->jump_host != NULL &&
|
|
strcmp(options->jump_host, "none") == 0 &&
|
|
options->jump_port == 0 && options->jump_user == NULL) {
|
|
free(options->jump_host);
|
|
options->jump_host = NULL;
|
|
}
|
|
if (options->num_permitted_cnames == 1 &&
|
|
!config_has_permitted_cnames(options)) {
|
|
/* clean up CanonicalizePermittedCNAMEs=none */
|
|
free(options->permitted_cnames[0].source_list);
|
|
free(options->permitted_cnames[0].target_list);
|
|
memset(options->permitted_cnames, '\0',
|
|
sizeof(*options->permitted_cnames));
|
|
options->num_permitted_cnames = 0;
|
|
}
|
|
/* options->identity_agent distinguishes NULL from 'none' */
|
|
/* 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 */
|
|
|
|
/* success */
|
|
ret = 0;
|
|
fail:
|
|
free(all_cipher);
|
|
free(all_mac);
|
|
free(all_kex);
|
|
free(all_key);
|
|
free(all_sig);
|
|
free(def_cipher);
|
|
free(def_mac);
|
|
free(def_kex);
|
|
free(def_key);
|
|
free(def_sig);
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
free_options(Options *o)
|
|
{
|
|
int i;
|
|
|
|
if (o == NULL)
|
|
return;
|
|
|
|
#define FREE_ARRAY(type, n, a) \
|
|
do { \
|
|
type _i; \
|
|
for (_i = 0; _i < (n); _i++) \
|
|
free((a)[_i]); \
|
|
} while (0)
|
|
|
|
free(o->forward_agent_sock_path);
|
|
free(o->xauth_location);
|
|
FREE_ARRAY(u_int, o->num_log_verbose, o->log_verbose);
|
|
free(o->log_verbose);
|
|
free(o->ciphers);
|
|
free(o->macs);
|
|
free(o->hostkeyalgorithms);
|
|
free(o->kex_algorithms);
|
|
free(o->ca_sign_algorithms);
|
|
free(o->hostname);
|
|
free(o->host_key_alias);
|
|
free(o->proxy_command);
|
|
free(o->user);
|
|
FREE_ARRAY(u_int, o->num_system_hostfiles, o->system_hostfiles);
|
|
FREE_ARRAY(u_int, o->num_user_hostfiles, o->user_hostfiles);
|
|
free(o->preferred_authentications);
|
|
free(o->bind_address);
|
|
free(o->bind_interface);
|
|
free(o->pkcs11_provider);
|
|
free(o->sk_provider);
|
|
for (i = 0; i < o->num_identity_files; i++) {
|
|
free(o->identity_files[i]);
|
|
sshkey_free(o->identity_keys[i]);
|
|
}
|
|
for (i = 0; i < o->num_certificate_files; i++) {
|
|
free(o->certificate_files[i]);
|
|
sshkey_free(o->certificates[i]);
|
|
}
|
|
free(o->identity_agent);
|
|
for (i = 0; i < o->num_local_forwards; i++) {
|
|
free(o->local_forwards[i].listen_host);
|
|
free(o->local_forwards[i].listen_path);
|
|
free(o->local_forwards[i].connect_host);
|
|
free(o->local_forwards[i].connect_path);
|
|
}
|
|
free(o->local_forwards);
|
|
for (i = 0; i < o->num_remote_forwards; i++) {
|
|
free(o->remote_forwards[i].listen_host);
|
|
free(o->remote_forwards[i].listen_path);
|
|
free(o->remote_forwards[i].connect_host);
|
|
free(o->remote_forwards[i].connect_path);
|
|
}
|
|
free(o->remote_forwards);
|
|
free(o->stdio_forward_host);
|
|
FREE_ARRAY(u_int, o->num_send_env, o->send_env);
|
|
free(o->send_env);
|
|
FREE_ARRAY(u_int, o->num_setenv, o->setenv);
|
|
free(o->setenv);
|
|
free(o->control_path);
|
|
free(o->local_command);
|
|
free(o->remote_command);
|
|
FREE_ARRAY(int, o->num_canonical_domains, o->canonical_domains);
|
|
for (i = 0; i < o->num_permitted_cnames; i++) {
|
|
free(o->permitted_cnames[i].source_list);
|
|
free(o->permitted_cnames[i].target_list);
|
|
}
|
|
free(o->revoked_host_keys);
|
|
free(o->hostbased_accepted_algos);
|
|
free(o->pubkey_accepted_algos);
|
|
free(o->jump_user);
|
|
free(o->jump_host);
|
|
free(o->jump_extra);
|
|
free(o->ignored_unknown);
|
|
explicit_bzero(o, sizeof(*o));
|
|
#undef FREE_ARRAY
|
|
}
|
|
|
|
struct fwdarg {
|
|
char *arg;
|
|
int ispath;
|
|
};
|
|
|
|
/*
|
|
* parse_fwd_field
|
|
* parses the next field in a port forwarding specification.
|
|
* sets fwd to the parsed field and advances p past the colon
|
|
* or sets it to NULL at end of string.
|
|
* returns 0 on success, else non-zero.
|
|
*/
|
|
static int
|
|
parse_fwd_field(char **p, struct fwdarg *fwd)
|
|
{
|
|
char *ep, *cp = *p;
|
|
int ispath = 0;
|
|
|
|
if (*cp == '\0') {
|
|
*p = NULL;
|
|
return -1; /* end of string */
|
|
}
|
|
|
|
/*
|
|
* A field escaped with square brackets is used literally.
|
|
* XXX - allow ']' to be escaped via backslash?
|
|
*/
|
|
if (*cp == '[') {
|
|
/* find matching ']' */
|
|
for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
|
|
if (*ep == '/')
|
|
ispath = 1;
|
|
}
|
|
/* no matching ']' or not at end of field. */
|
|
if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
|
|
return -1;
|
|
/* NUL terminate the field and advance p past the colon */
|
|
*ep++ = '\0';
|
|
if (*ep != '\0')
|
|
*ep++ = '\0';
|
|
fwd->arg = cp + 1;
|
|
fwd->ispath = ispath;
|
|
*p = ep;
|
|
return 0;
|
|
}
|
|
|
|
for (cp = *p; *cp != '\0'; cp++) {
|
|
switch (*cp) {
|
|
case '\\':
|
|
memmove(cp, cp + 1, strlen(cp + 1) + 1);
|
|
if (*cp == '\0')
|
|
return -1;
|
|
break;
|
|
case '/':
|
|
ispath = 1;
|
|
break;
|
|
case ':':
|
|
*cp++ = '\0';
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
fwd->arg = *p;
|
|
fwd->ispath = ispath;
|
|
*p = cp;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* parse_forward
|
|
* parses a string containing a port forwarding specification of the form:
|
|
* dynamicfwd == 0
|
|
* [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
|
|
* listenpath:connectpath
|
|
* dynamicfwd == 1
|
|
* [listenhost:]listenport
|
|
* returns number of arguments parsed or zero on error
|
|
*/
|
|
int
|
|
parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
|
|
{
|
|
struct fwdarg fwdargs[4];
|
|
char *p, *cp;
|
|
int i, err;
|
|
|
|
memset(fwd, 0, sizeof(*fwd));
|
|
memset(fwdargs, 0, sizeof(fwdargs));
|
|
|
|
/*
|
|
* We expand environment variables before checking if we think they're
|
|
* paths so that if ${VAR} expands to a fully qualified path it is
|
|
* treated as a path.
|
|
*/
|
|
cp = p = dollar_expand(&err, fwdspec);
|
|
if (p == NULL || err)
|
|
return 0;
|
|
|
|
/* skip leading spaces */
|
|
while (isspace((u_char)*cp))
|
|
cp++;
|
|
|
|
for (i = 0; i < 4; ++i) {
|
|
if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
|
|
break;
|
|
}
|
|
|
|
/* Check for trailing garbage */
|
|
if (cp != NULL && *cp != '\0') {
|
|
i = 0; /* failure */
|
|
}
|
|
|
|
switch (i) {
|
|
case 1:
|
|
if (fwdargs[0].ispath) {
|
|
fwd->listen_path = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = PORT_STREAMLOCAL;
|
|
} else {
|
|
fwd->listen_host = NULL;
|
|
fwd->listen_port = a2port(fwdargs[0].arg);
|
|
}
|
|
fwd->connect_host = xstrdup("socks");
|
|
break;
|
|
|
|
case 2:
|
|
if (fwdargs[0].ispath && fwdargs[1].ispath) {
|
|
fwd->listen_path = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = PORT_STREAMLOCAL;
|
|
fwd->connect_path = xstrdup(fwdargs[1].arg);
|
|
fwd->connect_port = PORT_STREAMLOCAL;
|
|
} else if (fwdargs[1].ispath) {
|
|
fwd->listen_host = NULL;
|
|
fwd->listen_port = a2port(fwdargs[0].arg);
|
|
fwd->connect_path = xstrdup(fwdargs[1].arg);
|
|
fwd->connect_port = PORT_STREAMLOCAL;
|
|
} else {
|
|
fwd->listen_host = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = a2port(fwdargs[1].arg);
|
|
fwd->connect_host = xstrdup("socks");
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
if (fwdargs[0].ispath) {
|
|
fwd->listen_path = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = PORT_STREAMLOCAL;
|
|
fwd->connect_host = xstrdup(fwdargs[1].arg);
|
|
fwd->connect_port = a2port(fwdargs[2].arg);
|
|
} else if (fwdargs[2].ispath) {
|
|
fwd->listen_host = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = a2port(fwdargs[1].arg);
|
|
fwd->connect_path = xstrdup(fwdargs[2].arg);
|
|
fwd->connect_port = PORT_STREAMLOCAL;
|
|
} else {
|
|
fwd->listen_host = NULL;
|
|
fwd->listen_port = a2port(fwdargs[0].arg);
|
|
fwd->connect_host = xstrdup(fwdargs[1].arg);
|
|
fwd->connect_port = a2port(fwdargs[2].arg);
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
fwd->listen_host = xstrdup(fwdargs[0].arg);
|
|
fwd->listen_port = a2port(fwdargs[1].arg);
|
|
fwd->connect_host = xstrdup(fwdargs[2].arg);
|
|
fwd->connect_port = a2port(fwdargs[3].arg);
|
|
break;
|
|
default:
|
|
i = 0; /* failure */
|
|
}
|
|
|
|
free(p);
|
|
|
|
if (dynamicfwd) {
|
|
if (!(i == 1 || i == 2))
|
|
goto fail_free;
|
|
} else {
|
|
if (!(i == 3 || i == 4)) {
|
|
if (fwd->connect_path == NULL &&
|
|
fwd->listen_path == NULL)
|
|
goto fail_free;
|
|
}
|
|
if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
|
|
goto fail_free;
|
|
}
|
|
|
|
if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
|
|
(!remotefwd && fwd->listen_port == 0))
|
|
goto fail_free;
|
|
if (fwd->connect_host != NULL &&
|
|
strlen(fwd->connect_host) >= NI_MAXHOST)
|
|
goto fail_free;
|
|
/*
|
|
* XXX - if connecting to a remote socket, max sun len may not
|
|
* match this host
|
|
*/
|
|
if (fwd->connect_path != NULL &&
|
|
strlen(fwd->connect_path) >= PATH_MAX_SUN)
|
|
goto fail_free;
|
|
if (fwd->listen_host != NULL &&
|
|
strlen(fwd->listen_host) >= NI_MAXHOST)
|
|
goto fail_free;
|
|
if (fwd->listen_path != NULL &&
|
|
strlen(fwd->listen_path) >= PATH_MAX_SUN)
|
|
goto fail_free;
|
|
|
|
return (i);
|
|
|
|
fail_free:
|
|
free(fwd->connect_host);
|
|
fwd->connect_host = NULL;
|
|
free(fwd->connect_path);
|
|
fwd->connect_path = NULL;
|
|
free(fwd->listen_host);
|
|
fwd->listen_host = NULL;
|
|
free(fwd->listen_path);
|
|
fwd->listen_path = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
parse_jump(const char *s, Options *o, int active)
|
|
{
|
|
char *orig, *sdup, *cp;
|
|
char *host = NULL, *user = NULL;
|
|
int r, ret = -1, port = -1, first;
|
|
|
|
active &= o->proxy_command == NULL && o->jump_host == NULL;
|
|
|
|
orig = sdup = xstrdup(s);
|
|
|
|
/* Remove comment and trailing whitespace */
|
|
if ((cp = strchr(orig, '#')) != NULL)
|
|
*cp = '\0';
|
|
rtrim(orig);
|
|
|
|
first = active;
|
|
do {
|
|
if (strcasecmp(s, "none") == 0)
|
|
break;
|
|
if ((cp = strrchr(sdup, ',')) == NULL)
|
|
cp = sdup; /* last */
|
|
else
|
|
*cp++ = '\0';
|
|
|
|
if (first) {
|
|
/* First argument and configuration is active */
|
|
r = parse_ssh_uri(cp, &user, &host, &port);
|
|
if (r == -1 || (r == 1 &&
|
|
parse_user_host_port(cp, &user, &host, &port) != 0))
|
|
goto out;
|
|
} else {
|
|
/* Subsequent argument or inactive configuration */
|
|
r = parse_ssh_uri(cp, NULL, NULL, NULL);
|
|
if (r == -1 || (r == 1 &&
|
|
parse_user_host_port(cp, NULL, NULL, NULL) != 0))
|
|
goto out;
|
|
}
|
|
first = 0; /* only check syntax for subsequent hosts */
|
|
} while (cp != sdup);
|
|
/* success */
|
|
if (active) {
|
|
if (strcasecmp(s, "none") == 0) {
|
|
o->jump_host = xstrdup("none");
|
|
o->jump_port = 0;
|
|
} else {
|
|
o->jump_user = user;
|
|
o->jump_host = host;
|
|
o->jump_port = port;
|
|
o->proxy_command = xstrdup("none");
|
|
user = host = NULL;
|
|
if ((cp = strrchr(s, ',')) != NULL && cp != s) {
|
|
o->jump_extra = xstrdup(s);
|
|
o->jump_extra[cp - s] = '\0';
|
|
}
|
|
}
|
|
}
|
|
ret = 0;
|
|
out:
|
|
free(orig);
|
|
free(user);
|
|
free(host);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
parse_ssh_uri(const char *uri, char **userp, char **hostp, int *portp)
|
|
{
|
|
char *user = NULL, *host = NULL, *path = NULL;
|
|
int r, port;
|
|
|
|
r = parse_uri("ssh", uri, &user, &host, &port, &path);
|
|
if (r == 0 && path != NULL)
|
|
r = -1; /* path not allowed */
|
|
if (r == 0) {
|
|
if (userp != NULL) {
|
|
*userp = user;
|
|
user = NULL;
|
|
}
|
|
if (hostp != NULL) {
|
|
*hostp = host;
|
|
host = NULL;
|
|
}
|
|
if (portp != NULL)
|
|
*portp = port;
|
|
}
|
|
free(user);
|
|
free(host);
|
|
free(path);
|
|
return r;
|
|
}
|
|
|
|
/* XXX the following is a near-vebatim copy from servconf.c; refactor */
|
|
static const char *
|
|
fmt_multistate_int(int val, const struct multistate *m)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; m[i].key != NULL; i++) {
|
|
if (m[i].value == val)
|
|
return m[i].key;
|
|
}
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
static const char *
|
|
fmt_intarg(OpCodes code, int val)
|
|
{
|
|
if (val == -1)
|
|
return "unset";
|
|
switch (code) {
|
|
case oAddressFamily:
|
|
return fmt_multistate_int(val, multistate_addressfamily);
|
|
case oVerifyHostKeyDNS:
|
|
case oUpdateHostkeys:
|
|
return fmt_multistate_int(val, multistate_yesnoask);
|
|
case oStrictHostKeyChecking:
|
|
return fmt_multistate_int(val, multistate_strict_hostkey);
|
|
case oControlMaster:
|
|
return fmt_multistate_int(val, multistate_controlmaster);
|
|
case oTunnel:
|
|
return fmt_multistate_int(val, multistate_tunnel);
|
|
case oRequestTTY:
|
|
return fmt_multistate_int(val, multistate_requesttty);
|
|
case oSessionType:
|
|
return fmt_multistate_int(val, multistate_sessiontype);
|
|
case oCanonicalizeHostname:
|
|
return fmt_multistate_int(val, multistate_canonicalizehostname);
|
|
case oAddKeysToAgent:
|
|
return fmt_multistate_int(val, multistate_yesnoaskconfirm);
|
|
case oPubkeyAuthentication:
|
|
return fmt_multistate_int(val, multistate_pubkey_auth);
|
|
case oFingerprintHash:
|
|
return ssh_digest_alg_name(val);
|
|
default:
|
|
switch (val) {
|
|
case 0:
|
|
return "no";
|
|
case 1:
|
|
return "yes";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char *
|
|
lookup_opcode_name(OpCodes code)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; keywords[i].name != NULL; i++)
|
|
if (keywords[i].opcode == code)
|
|
return(keywords[i].name);
|
|
return "UNKNOWN";
|
|
}
|
|
|
|
static void
|
|
dump_cfg_int(OpCodes code, int val)
|
|
{
|
|
printf("%s %d\n", lookup_opcode_name(code), val);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_fmtint(OpCodes code, int val)
|
|
{
|
|
printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val));
|
|
}
|
|
|
|
static void
|
|
dump_cfg_string(OpCodes code, const char *val)
|
|
{
|
|
if (val == NULL)
|
|
return;
|
|
printf("%s %s\n", lookup_opcode_name(code), val);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_strarray(OpCodes code, u_int count, char **vals)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
printf("%s %s\n", lookup_opcode_name(code), vals[i]);
|
|
}
|
|
|
|
static void
|
|
dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals)
|
|
{
|
|
u_int i;
|
|
|
|
printf("%s", lookup_opcode_name(code));
|
|
if (count == 0)
|
|
printf(" none");
|
|
for (i = 0; i < count; i++)
|
|
printf(" %s", vals[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
static void
|
|
dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds)
|
|
{
|
|
const struct Forward *fwd;
|
|
u_int i;
|
|
|
|
/* oDynamicForward */
|
|
for (i = 0; i < count; i++) {
|
|
fwd = &fwds[i];
|
|
if (code == oDynamicForward && fwd->connect_host != NULL &&
|
|
strcmp(fwd->connect_host, "socks") != 0)
|
|
continue;
|
|
if (code == oLocalForward && fwd->connect_host != NULL &&
|
|
strcmp(fwd->connect_host, "socks") == 0)
|
|
continue;
|
|
printf("%s", lookup_opcode_name(code));
|
|
if (fwd->listen_port == PORT_STREAMLOCAL)
|
|
printf(" %s", fwd->listen_path);
|
|
else if (fwd->listen_host == NULL)
|
|
printf(" %d", fwd->listen_port);
|
|
else {
|
|
printf(" [%s]:%d",
|
|
fwd->listen_host, fwd->listen_port);
|
|
}
|
|
if (code != oDynamicForward) {
|
|
if (fwd->connect_port == PORT_STREAMLOCAL)
|
|
printf(" %s", fwd->connect_path);
|
|
else if (fwd->connect_host == NULL)
|
|
printf(" %d", fwd->connect_port);
|
|
else {
|
|
printf(" [%s]:%d",
|
|
fwd->connect_host, fwd->connect_port);
|
|
}
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
void
|
|
dump_client_config(Options *o, const char *host)
|
|
{
|
|
int i, r;
|
|
char buf[8], *all_key;
|
|
|
|
/*
|
|
* Expand HostKeyAlgorithms name lists. This isn't handled in
|
|
* fill_default_options() like the other algorithm lists because
|
|
* the host key algorithms are by default dynamically chosen based
|
|
* on the host's keys found in known_hosts.
|
|
*/
|
|
all_key = sshkey_alg_list(0, 0, 1, ',');
|
|
if ((r = kex_assemble_names(&o->hostkeyalgorithms, kex_default_pk_alg(),
|
|
all_key)) != 0)
|
|
fatal_fr(r, "expand HostKeyAlgorithms");
|
|
free(all_key);
|
|
|
|
/* Most interesting options first: user, host, port */
|
|
dump_cfg_string(oHost, o->host_arg);
|
|
dump_cfg_string(oUser, o->user);
|
|
dump_cfg_string(oHostname, host);
|
|
dump_cfg_int(oPort, o->port);
|
|
|
|
/* Flag options */
|
|
dump_cfg_fmtint(oAddressFamily, o->address_family);
|
|
dump_cfg_fmtint(oBatchMode, o->batch_mode);
|
|
dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local);
|
|
dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname);
|
|
dump_cfg_fmtint(oCheckHostIP, o->check_host_ip);
|
|
dump_cfg_fmtint(oCompression, o->compression);
|
|
dump_cfg_fmtint(oControlMaster, o->control_master);
|
|
dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign);
|
|
dump_cfg_fmtint(oClearAllForwardings, o->clear_forwardings);
|
|
dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure);
|
|
dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash);
|
|
dump_cfg_fmtint(oForwardX11, o->forward_x11);
|
|
dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted);
|
|
dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports);
|
|
#ifdef GSSAPI
|
|
dump_cfg_fmtint(oGssAuthentication, o->gss_authentication);
|
|
dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds);
|
|
#endif /* GSSAPI */
|
|
dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts);
|
|
dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication);
|
|
dump_cfg_fmtint(oIdentitiesOnly, o->identities_only);
|
|
dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication);
|
|
dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost);
|
|
dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication);
|
|
dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command);
|
|
dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass);
|
|
dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication);
|
|
dump_cfg_fmtint(oRequestTTY, o->request_tty);
|
|
dump_cfg_fmtint(oSessionType, o->session_type);
|
|
dump_cfg_fmtint(oStdinNull, o->stdin_null);
|
|
dump_cfg_fmtint(oForkAfterAuthentication, o->fork_after_authentication);
|
|
dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink);
|
|
dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking);
|
|
dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive);
|
|
dump_cfg_fmtint(oTunnel, o->tun_open);
|
|
dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns);
|
|
dump_cfg_fmtint(oVisualHostKey, o->visual_host_key);
|
|
dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys);
|
|
dump_cfg_fmtint(oEnableEscapeCommandline, o->enable_escape_commandline);
|
|
|
|
/* Integer options */
|
|
dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots);
|
|
dump_cfg_int(oConnectionAttempts, o->connection_attempts);
|
|
dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout);
|
|
dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts);
|
|
dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max);
|
|
dump_cfg_int(oServerAliveInterval, o->server_alive_interval);
|
|
dump_cfg_int(oRequiredRSASize, o->required_rsa_size);
|
|
|
|
/* String options */
|
|
dump_cfg_string(oBindAddress, o->bind_address);
|
|
dump_cfg_string(oBindInterface, o->bind_interface);
|
|
dump_cfg_string(oCiphers, o->ciphers);
|
|
dump_cfg_string(oControlPath, o->control_path);
|
|
dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms);
|
|
dump_cfg_string(oHostKeyAlias, o->host_key_alias);
|
|
dump_cfg_string(oHostbasedAcceptedAlgorithms, o->hostbased_accepted_algos);
|
|
dump_cfg_string(oIdentityAgent, o->identity_agent);
|
|
dump_cfg_string(oIgnoreUnknown, o->ignored_unknown);
|
|
dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices);
|
|
dump_cfg_string(oKexAlgorithms, o->kex_algorithms);
|
|
dump_cfg_string(oCASignatureAlgorithms, o->ca_sign_algorithms);
|
|
dump_cfg_string(oLocalCommand, o->local_command);
|
|
dump_cfg_string(oRemoteCommand, o->remote_command);
|
|
dump_cfg_string(oLogLevel, log_level_name(o->log_level));
|
|
dump_cfg_string(oMacs, o->macs);
|
|
#ifdef ENABLE_PKCS11
|
|
dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
|
|
#endif
|
|
dump_cfg_string(oSecurityKeyProvider, o->sk_provider);
|
|
dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
|
|
dump_cfg_string(oPubkeyAcceptedAlgorithms, o->pubkey_accepted_algos);
|
|
dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
|
|
dump_cfg_string(oXAuthLocation, o->xauth_location);
|
|
dump_cfg_string(oKnownHostsCommand, o->known_hosts_command);
|
|
|
|
/* Forwards */
|
|
dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards);
|
|
dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards);
|
|
dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards);
|
|
|
|
/* String array options */
|
|
dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files);
|
|
dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains);
|
|
dump_cfg_strarray(oCertificateFile, o->num_certificate_files, o->certificate_files);
|
|
dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles);
|
|
dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles);
|
|
dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env);
|
|
dump_cfg_strarray(oSetEnv, o->num_setenv, o->setenv);
|
|
dump_cfg_strarray_oneline(oLogVerbose,
|
|
o->num_log_verbose, o->log_verbose);
|
|
|
|
/* Special cases */
|
|
|
|
/* PermitRemoteOpen */
|
|
if (o->num_permitted_remote_opens == 0)
|
|
printf("%s any\n", lookup_opcode_name(oPermitRemoteOpen));
|
|
else
|
|
dump_cfg_strarray_oneline(oPermitRemoteOpen,
|
|
o->num_permitted_remote_opens, o->permitted_remote_opens);
|
|
|
|
/* AddKeysToAgent */
|
|
if (o->add_keys_to_agent_lifespan <= 0)
|
|
dump_cfg_fmtint(oAddKeysToAgent, o->add_keys_to_agent);
|
|
else {
|
|
printf("addkeystoagent%s %d\n",
|
|
o->add_keys_to_agent == 3 ? " confirm" : "",
|
|
o->add_keys_to_agent_lifespan);
|
|
}
|
|
|
|
/* oForwardAgent */
|
|
if (o->forward_agent_sock_path == NULL)
|
|
dump_cfg_fmtint(oForwardAgent, o->forward_agent);
|
|
else
|
|
dump_cfg_string(oForwardAgent, o->forward_agent_sock_path);
|
|
|
|
/* oConnectTimeout */
|
|
if (o->connection_timeout == -1)
|
|
printf("connecttimeout none\n");
|
|
else
|
|
dump_cfg_int(oConnectTimeout, o->connection_timeout);
|
|
|
|
/* oTunnelDevice */
|
|
printf("tunneldevice");
|
|
if (o->tun_local == SSH_TUNID_ANY)
|
|
printf(" any");
|
|
else
|
|
printf(" %d", o->tun_local);
|
|
if (o->tun_remote == SSH_TUNID_ANY)
|
|
printf(":any");
|
|
else
|
|
printf(":%d", o->tun_remote);
|
|
printf("\n");
|
|
|
|
/* oCanonicalizePermittedCNAMEs */
|
|
printf("canonicalizePermittedcnames");
|
|
if (o->num_permitted_cnames == 0)
|
|
printf(" none");
|
|
for (i = 0; i < o->num_permitted_cnames; i++) {
|
|
printf(" %s:%s", o->permitted_cnames[i].source_list,
|
|
o->permitted_cnames[i].target_list);
|
|
}
|
|
printf("\n");
|
|
|
|
/* oControlPersist */
|
|
if (o->control_persist == 0 || o->control_persist_timeout == 0)
|
|
dump_cfg_fmtint(oControlPersist, o->control_persist);
|
|
else
|
|
dump_cfg_int(oControlPersist, o->control_persist_timeout);
|
|
|
|
/* oEscapeChar */
|
|
if (o->escape_char == SSH_ESCAPECHAR_NONE)
|
|
printf("escapechar none\n");
|
|
else {
|
|
vis(buf, o->escape_char, VIS_WHITE, 0);
|
|
printf("escapechar %s\n", buf);
|
|
}
|
|
|
|
/* oIPQoS */
|
|
printf("ipqos %s ", iptos2str(o->ip_qos_interactive));
|
|
printf("%s\n", iptos2str(o->ip_qos_bulk));
|
|
|
|
/* oRekeyLimit */
|
|
printf("rekeylimit %llu %d\n",
|
|
(unsigned long long)o->rekey_limit, o->rekey_interval);
|
|
|
|
/* oStreamLocalBindMask */
|
|
printf("streamlocalbindmask 0%o\n",
|
|
o->fwd_opts.streamlocal_bind_mask);
|
|
|
|
/* oLogFacility */
|
|
printf("syslogfacility %s\n", log_facility_name(o->log_facility));
|
|
|
|
/* oProxyCommand / oProxyJump */
|
|
if (o->jump_host == NULL)
|
|
dump_cfg_string(oProxyCommand, o->proxy_command);
|
|
else {
|
|
/* Check for numeric addresses */
|
|
i = strchr(o->jump_host, ':') != NULL ||
|
|
strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
|
|
snprintf(buf, sizeof(buf), "%d", o->jump_port);
|
|
printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
|
|
/* optional additional jump spec */
|
|
o->jump_extra == NULL ? "" : o->jump_extra,
|
|
o->jump_extra == NULL ? "" : ",",
|
|
/* optional user */
|
|
o->jump_user == NULL ? "" : o->jump_user,
|
|
o->jump_user == NULL ? "" : "@",
|
|
/* opening [ if hostname is numeric */
|
|
i ? "[" : "",
|
|
/* mandatory hostname */
|
|
o->jump_host,
|
|
/* closing ] if hostname is numeric */
|
|
i ? "]" : "",
|
|
/* optional port number */
|
|
o->jump_port <= 0 ? "" : ":",
|
|
o->jump_port <= 0 ? "" : buf);
|
|
}
|
|
}
|