X-Git-Url: http://andersk.mit.edu/gitweb/gssapi-openssh.git/blobdiff_plain/2c06c99bdf88232ed9b4bdd395241e526a65f00a..fe53310bc2e7636f1dd16001684d0c5d936cd292:/openssh/readconf.c diff --git a/openssh/readconf.c b/openssh/readconf.c index 1fbf597..0f29417 100644 --- a/openssh/readconf.c +++ b/openssh/readconf.c @@ -1,3 +1,4 @@ +/* $OpenBSD: readconf.c,v 1.176 2009/02/12 03:00:56 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -12,17 +13,33 @@ */ #include "includes.h" -RCSID("$OpenBSD: readconf.c,v 1.145 2005/12/08 18:34:11 reyk Exp $"); -#include "ssh.h" +#include +#include +#include + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + #include "xmalloc.h" +#include "ssh.h" #include "compat.h" #include "cipher.h" #include "pathnames.h" #include "log.h" +#include "key.h" #include "readconf.h" #include "match.h" #include "misc.h" +#include "buffer.h" #include "kex.h" #include "mac.h" @@ -94,6 +111,7 @@ RCSID("$OpenBSD: readconf.c,v 1.145 2005/12/08 18:34:11 reyk Exp $"); typedef enum { oBadOption, oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts, + oExitOnForwardFailure, oPasswordAuthentication, oRSAAuthentication, oChallengeResponseAuthentication, oXAuthLocation, oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, @@ -109,9 +127,13 @@ typedef enum { oClearAllForwardings, oNoHostAuthenticationForLocalhost, oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout, oAddressFamily, oGssAuthentication, oGssDelegateCreds, + oGssTrustDns, oGssKeyEx, oGssClientIdentity, oGssRenewalRekey, oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly, oSendEnv, oControlPath, oControlMaster, oHashKnownHosts, oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, + oVisualHostKey, oZeroKnowledgePasswordAuthentication, + oNoneEnabled, oTcpRcvBufPoll, oTcpRcvBuf, oNoneSwitch, oHPNDisabled, + oHPNBufferSize, oDeprecated, oUnsupported } OpCodes; @@ -124,6 +146,7 @@ static struct { { "forwardagent", oForwardAgent }, { "forwardx11", oForwardX11 }, { "forwardx11trusted", oForwardX11Trusted }, + { "exitonforwardfailure", oExitOnForwardFailure }, { "xauthlocation", oXAuthLocation }, { "gatewayports", oGatewayPorts }, { "useprivilegedport", oUsePrivilegedPort }, @@ -144,15 +167,23 @@ static struct { { "afstokenpassing", oUnsupported }, #if defined(GSSAPI) { "gssapiauthentication", oGssAuthentication }, + { "gssapikeyexchange", oGssKeyEx }, { "gssapidelegatecredentials", oGssDelegateCreds }, + { "gssapitrustdns", oGssTrustDns }, + { "gssapiclientidentity", oGssClientIdentity }, + { "gssapirenewalforcesrekey", oGssRenewalRekey }, #else { "gssapiauthentication", oUnsupported }, + { "gssapikeyexchange", oUnsupported }, { "gssapidelegatecredentials", oUnsupported }, + { "gssapitrustdns", oUnsupported }, + { "gssapiclientidentity", oUnsupported }, + { "gssapirenewalforcesrekey", oUnsupported }, #endif { "fallbacktorsh", oDeprecated }, { "usersh", oDeprecated }, { "identityfile", oIdentityFile }, - { "identityfile2", oIdentityFile }, /* alias */ + { "identityfile2", oIdentityFile }, /* obsolete */ { "identitiesonly", oIdentitiesOnly }, { "hostname", oHostName }, { "hostkeyalias", oHostKeyAlias }, @@ -168,8 +199,8 @@ static struct { { "host", oHost }, { "escapechar", oEscapeChar }, { "globalknownhostsfile", oGlobalKnownHostsFile }, - { "userknownhostsfile", oUserKnownHostsFile }, /* obsolete */ - { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, + { "globalknownhostsfile2", oGlobalKnownHostsFile2 }, /* obsolete */ + { "userknownhostsfile", oUserKnownHostsFile }, { "userknownhostsfile2", oUserKnownHostsFile2 }, /* obsolete */ { "connectionattempts", oConnectionAttempts }, { "batchmode", oBatchMode }, @@ -207,6 +238,19 @@ static struct { { "tunneldevice", oTunnelDevice }, { "localcommand", oLocalCommand }, { "permitlocalcommand", oPermitLocalCommand }, + { "visualhostkey", oVisualHostKey }, +#ifdef JPAKE + { "zeroknowledgepasswordauthentication", + oZeroKnowledgePasswordAuthentication }, +#else + { "zeroknowledgepasswordauthentication", oUnsupported }, +#endif + { "noneenabled", oNoneEnabled }, + { "tcprcvbufpoll", oTcpRcvBufPoll }, + { "tcprcvbuf", oTcpRcvBuf }, + { "noneswitch", oNoneSwitch }, + { "hpndisabled", oHPNDisabled }, + { "hpnbuffersize", oHPNBufferSize }, { NULL, oBadOption } }; @@ -228,10 +272,9 @@ add_local_forward(Options *options, const Forward *newfwd) fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION); fwd = &options->local_forwards[options->num_local_forwards++]; - fwd->listen_host = (newfwd->listen_host == NULL) ? - NULL : xstrdup(newfwd->listen_host); + fwd->listen_host = newfwd->listen_host; fwd->listen_port = newfwd->listen_port; - fwd->connect_host = xstrdup(newfwd->connect_host); + fwd->connect_host = newfwd->connect_host; fwd->connect_port = newfwd->connect_port; } @@ -249,10 +292,9 @@ add_remote_forward(Options *options, const Forward *newfwd) SSH_MAX_FORWARDS_PER_DIRECTION); fwd = &options->remote_forwards[options->num_remote_forwards++]; - fwd->listen_host = (newfwd->listen_host == NULL) ? - NULL : xstrdup(newfwd->listen_host); + fwd->listen_host = newfwd->listen_host; fwd->listen_port = newfwd->listen_port; - fwd->connect_host = xstrdup(newfwd->connect_host); + fwd->connect_host = newfwd->connect_host; fwd->connect_port = newfwd->connect_port; } @@ -306,7 +348,9 @@ process_config_line(Options *options, const char *host, int *activep) { char *s, **charptr, *endofnumber, *keyword, *arg, *arg2, fwdarg[256]; - int opcode, *intptr, value, value2; + int opcode, *intptr, value, value2, scale; + LogLevel *log_level_ptr; + long long orig, val64; size_t len; Forward fwd; @@ -319,7 +363,8 @@ process_config_line(Options *options, const char *host, s = line; /* Get the keyword. (Each line is supposed to begin with a keyword). */ - keyword = strdelim(&s); + if ((keyword = strdelim(&s)) == NULL) + return 0; /* Ignore leading whitespace. */ if (*keyword == '\0') keyword = strdelim(&s); @@ -343,7 +388,7 @@ parse_time: if ((value = convtime(arg)) == -1) fatal("%s line %d: invalid time value.", filename, linenum); - if (*intptr == -1) + if (*activep && *intptr == -1) *intptr = value; break; @@ -376,6 +421,10 @@ parse_flag: intptr = &options->gateway_ports; goto parse_flag; + case oExitOnForwardFailure: + intptr = &options->exit_on_forward_failure; + goto parse_flag; + case oUsePrivilegedPort: intptr = &options->use_privileged_port; goto parse_flag; @@ -384,6 +433,10 @@ parse_flag: intptr = &options->password_authentication; goto parse_flag; + case oZeroKnowledgePasswordAuthentication: + intptr = &options->zero_knowledge_password_authentication; + goto parse_flag; + case oKbdInteractiveAuthentication: intptr = &options->kbd_interactive_authentication; goto parse_flag; @@ -416,10 +469,26 @@ parse_flag: intptr = &options->gss_authentication; goto parse_flag; + case oGssKeyEx: + intptr = &options->gss_keyex; + goto parse_flag; + case oGssDelegateCreds: intptr = &options->gss_deleg_creds; goto parse_flag; + case oGssTrustDns: + intptr = &options->gss_trust_dns; + goto parse_flag; + + case oGssClientIdentity: + charptr = &options->gss_client_identity; + goto parse_string; + + case oGssRenewalRekey: + intptr = &options->gss_renewal_rekey; + goto parse_flag; + case oBatchMode: intptr = &options->batch_mode; goto parse_flag; @@ -428,6 +497,37 @@ parse_flag: intptr = &options->check_host_ip; goto parse_flag; + case oNoneEnabled: + intptr = &options->none_enabled; + goto parse_flag; + + /* we check to see if the command comes from the */ + /* command line or not. If it does then enable it */ + /* otherwise fail. NONE should never be a default configuration */ + case oNoneSwitch: + if(strcmp(filename,"command-line")==0) + { + intptr = &options->none_switch; + goto parse_flag; + } else { + error("NoneSwitch is found in %.200s.\nYou may only use this configuration option from the command line", filename); + error("Continuing..."); + debug("NoneSwitch directive found in %.200s.", filename); + return 0; + } + + case oHPNDisabled: + intptr = &options->hpn_disabled; + goto parse_flag; + + case oHPNBufferSize: + intptr = &options->hpn_buffer_size; + goto parse_int; + + case oTcpRcvBufPoll: + intptr = &options->tcp_rcv_buf_poll; + goto parse_flag; + case oVerifyHostKeyDNS: intptr = &options->verify_host_key_dns; goto parse_yesnoask; @@ -473,28 +573,41 @@ parse_yesnoask: goto parse_int; case oRekeyLimit: - intptr = &options->rekey_limit; arg = strdelim(&s); if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); if (arg[0] < '0' || arg[0] > '9') fatal("%.200s line %d: Bad number.", filename, linenum); - value = strtol(arg, &endofnumber, 10); + orig = val64 = strtoll(arg, &endofnumber, 10); if (arg == endofnumber) fatal("%.200s line %d: Bad number.", filename, linenum); switch (toupper(*endofnumber)) { + case '\0': + scale = 1; + break; case 'K': - value *= 1<<10; + scale = 1<<10; break; case 'M': - value *= 1<<20; + scale = 1<<20; break; case 'G': - value *= 1<<30; + scale = 1<<30; break; + default: + fatal("%.200s line %d: Invalid RekeyLimit suffix", + filename, linenum); } - if (*activep && *intptr == -1) - *intptr = value; + val64 *= scale; + /* detect integer wrap and too-large limits */ + if ((val64 / scale) != orig || val64 > UINT_MAX) + fatal("%.200s line %d: RekeyLimit too large", + filename, linenum); + if (val64 < 16) + fatal("%.200s line %d: RekeyLimit too small", + filename, linenum); + if (*activep && options->rekey_limit == -1) + options->rekey_limit = (u_int32_t)val64; break; case oIdentityFile: @@ -506,7 +619,7 @@ parse_yesnoask: if (*intptr >= SSH_MAX_IDENTITY_FILES) fatal("%.200s line %d: Too many identity files specified (max %d).", filename, linenum, SSH_MAX_IDENTITY_FILES); - charptr = &options->identity_files[*intptr]; + charptr = &options->identity_files[*intptr]; *charptr = xstrdup(arg); *intptr = *intptr + 1; } @@ -593,6 +706,10 @@ parse_int: intptr = &options->connection_attempts; goto parse_int; + case oTcpRcvBuf: + intptr = &options->tcp_rcv_buf; + goto parse_int; + case oCipher: intptr = &options->cipher; arg = strdelim(&s); @@ -653,68 +770,52 @@ parse_int: break; case oLogLevel: - intptr = (int *) &options->log_level; + log_level_ptr = &options->log_level; arg = strdelim(&s); value = log_level_number(arg); if (value == SYSLOG_LEVEL_NOT_SET) fatal("%.200s line %d: unsupported log level '%s'", filename, linenum, arg ? arg : ""); - if (*activep && (LogLevel) *intptr == SYSLOG_LEVEL_NOT_SET) - *intptr = (LogLevel) value; + if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET) + *log_level_ptr = (LogLevel) value; break; case oLocalForward: case oRemoteForward: + case oDynamicForward: arg = strdelim(&s); if (arg == NULL || *arg == '\0') fatal("%.200s line %d: Missing port argument.", filename, linenum); - arg2 = strdelim(&s); - if (arg2 == NULL || *arg2 == '\0') - fatal("%.200s line %d: Missing target argument.", - filename, linenum); - /* construct a string for parse_forward */ - snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); + if (opcode == oLocalForward || + opcode == oRemoteForward) { + arg2 = strdelim(&s); + if (arg2 == NULL || *arg2 == '\0') + fatal("%.200s line %d: Missing target argument.", + filename, linenum); + + /* construct a string for parse_forward */ + snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2); + } else if (opcode == oDynamicForward) { + strlcpy(fwdarg, arg, sizeof(fwdarg)); + } - if (parse_forward(&fwd, fwdarg) == 0) + if (parse_forward(&fwd, fwdarg, + opcode == oDynamicForward ? 1 : 0, + opcode == oRemoteForward ? 1 : 0) == 0) fatal("%.200s line %d: Bad forwarding specification.", filename, linenum); if (*activep) { - if (opcode == oLocalForward) + if (opcode == oLocalForward || + opcode == oDynamicForward) add_local_forward(options, &fwd); else if (opcode == oRemoteForward) add_remote_forward(options, &fwd); } break; - case oDynamicForward: - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing port argument.", - filename, linenum); - memset(&fwd, '\0', sizeof(fwd)); - fwd.connect_host = "socks"; - fwd.listen_host = hpdelim(&arg); - if (fwd.listen_host == NULL || - strlen(fwd.listen_host) >= NI_MAXHOST) - fatal("%.200s line %d: Bad forwarding specification.", - filename, linenum); - if (arg) { - fwd.listen_port = a2port(arg); - fwd.listen_host = cleanhostname(fwd.listen_host); - } else { - fwd.listen_port = a2port(fwd.listen_host); - fwd.listen_host = NULL; - } - if (fwd.listen_port == 0) - fatal("%.200s line %d: Badly formatted port number.", - filename, linenum); - if (*activep) - add_local_forward(options, &fwd); - break; - case oClearAllForwardings: intptr = &options->clear_forwardings; goto parse_flag; @@ -876,6 +977,10 @@ parse_int: intptr = &options->permit_local_command; goto parse_flag; + case oVisualHostKey: + intptr = &options->visual_host_key; + goto parse_flag; + case oDeprecated: debug("%s line %d: Deprecated option \"%s\"", filename, linenum, keyword); @@ -914,7 +1019,6 @@ read_config_file(const char *filename, const char *host, Options *options, int active, linenum; int bad_options = 0; - /* Open the file. */ if ((f = fopen(filename, "r")) == NULL) return 0; @@ -963,6 +1067,7 @@ initialize_options(Options * options) options->forward_agent = -1; options->forward_x11 = -1; options->forward_x11_trusted = -1; + options->exit_on_forward_failure = -1; options->xauth_location = NULL; options->gateway_ports = -1; options->use_privileged_port = -1; @@ -970,7 +1075,11 @@ initialize_options(Options * options) options->pubkey_authentication = -1; options->challenge_response_authentication = -1; options->gss_authentication = -1; + options->gss_keyex = -1; options->gss_deleg_creds = -1; + options->gss_trust_dns = -1; + options->gss_renewal_rekey = -1; + options->gss_client_identity = NULL; options->password_authentication = -1; options->kbd_interactive_authentication = -1; options->kbd_interactive_devices = NULL; @@ -1025,6 +1134,26 @@ initialize_options(Options * options) options->tun_remote = -1; options->local_command = NULL; options->permit_local_command = -1; + options->none_switch = -1; + options->none_enabled = -1; + options->hpn_disabled = -1; + options->hpn_buffer_size = -1; + options->tcp_rcv_buf_poll = -1; + options->tcp_rcv_buf = -1; + options->visual_host_key = -1; + options->none_switch = -1; + options->none_enabled = -1; + options->hpn_disabled = -1; + options->hpn_buffer_size = -1; + options->tcp_rcv_buf_poll = -1; + options->tcp_rcv_buf = -1; + options->zero_knowledge_password_authentication = -1; + options->none_switch = -1; + options->none_enabled = -1; + options->hpn_disabled = -1; + options->hpn_buffer_size = -1; + options->tcp_rcv_buf_poll = -1; + options->tcp_rcv_buf = -1; } /* @@ -1043,6 +1172,8 @@ fill_default_options(Options * options) options->forward_x11 = 0; if (options->forward_x11_trusted == -1) options->forward_x11_trusted = 0; + if (options->exit_on_forward_failure == -1) + options->exit_on_forward_failure = 0; if (options->xauth_location == NULL) options->xauth_location = _PATH_XAUTH; if (options->gateway_ports == -1) @@ -1056,9 +1187,15 @@ fill_default_options(Options * options) if (options->challenge_response_authentication == -1) options->challenge_response_authentication = 1; if (options->gss_authentication == -1) - options->gss_authentication = 0; + options->gss_authentication = 1; + if (options->gss_keyex == -1) + options->gss_keyex = 1; if (options->gss_deleg_creds == -1) - options->gss_deleg_creds = 0; + options->gss_deleg_creds = 1; + if (options->gss_trust_dns == -1) + options->gss_trust_dns = 1; + if (options->gss_renewal_rekey == -1) + options->gss_renewal_rekey = 0; if (options->password_authentication == -1) options->password_authentication = 1; if (options->kbd_interactive_authentication == -1) @@ -1145,6 +1282,29 @@ fill_default_options(Options * options) options->server_alive_interval = 0; if (options->server_alive_count_max == -1) options->server_alive_count_max = 3; + if (options->none_switch == -1) + options->none_switch = 0; + if (options->hpn_disabled == -1) + options->hpn_disabled = 0; + if (options->hpn_buffer_size > -1) + { + /* if a user tries to set the size to 0 set it to 1KB */ + if (options->hpn_buffer_size == 0) + options->hpn_buffer_size = 1024; + /*limit the buffer to 64MB*/ + if (options->hpn_buffer_size > 65536) + { + options->hpn_buffer_size = 65536*1024; + debug("User requested buffer larger than 64MB. Request reverted to 64MB"); + } + debug("hpn_buffer_size set to %d", options->hpn_buffer_size); + } + if (options->tcp_rcv_buf == 0) + options->tcp_rcv_buf = 1; + if (options->tcp_rcv_buf > -1) + options->tcp_rcv_buf *=1024; + if (options->tcp_rcv_buf_poll == -1) + options->tcp_rcv_buf_poll = 1; if (options->control_master == -1) options->control_master = 0; if (options->hash_known_hosts == -1) @@ -1157,6 +1317,10 @@ fill_default_options(Options * options) 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->zero_knowledge_password_authentication == -1) + options->zero_knowledge_password_authentication = 0; /* options->local_command should not be set by default */ /* options->proxy_command should not be set by default */ /* options->user will be set in the main program if appropriate */ @@ -1168,11 +1332,14 @@ fill_default_options(Options * options) /* * parse_forward * parses a string containing a port forwarding specification of the form: + * dynamicfwd == 0 * [listenhost:]listenport:connecthost:connectport + * dynamicfwd == 1 + * [listenhost:]listenport * returns number of arguments parsed or zero on error */ int -parse_forward(Forward *fwd, const char *fwdspec) +parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd) { int i; char *p, *cp, *fwdarg[4]; @@ -1182,18 +1349,30 @@ parse_forward(Forward *fwd, const char *fwdspec) cp = p = xstrdup(fwdspec); /* skip leading spaces */ - while (*cp && isspace(*cp)) + while (isspace(*cp)) cp++; for (i = 0; i < 4; ++i) if ((fwdarg[i] = hpdelim(&cp)) == NULL) break; - /* Check for trailing garbage in 4-arg case*/ + /* Check for trailing garbage */ if (cp != NULL) i = 0; /* failure */ switch (i) { + case 1: + fwd->listen_host = NULL; + fwd->listen_port = a2port(fwdarg[0]); + fwd->connect_host = xstrdup("socks"); + break; + + case 2: + fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); + fwd->listen_port = a2port(fwdarg[1]); + fwd->connect_host = xstrdup("socks"); + break; + case 3: fwd->listen_host = NULL; fwd->listen_port = a2port(fwdarg[0]); @@ -1213,19 +1392,37 @@ parse_forward(Forward *fwd, const char *fwdspec) xfree(p); - if (fwd->listen_port == 0 && fwd->connect_port == 0) + if (dynamicfwd) { + if (!(i == 1 || i == 2)) + goto fail_free; + } else { + if (!(i == 3 || i == 4)) + goto fail_free; + if (fwd->connect_port <= 0) + goto fail_free; + } + + if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0)) goto fail_free; if (fwd->connect_host != NULL && strlen(fwd->connect_host) >= NI_MAXHOST) goto fail_free; + if (fwd->listen_host != NULL && + strlen(fwd->listen_host) >= NI_MAXHOST) + goto fail_free; + return (i); fail_free: - if (fwd->connect_host != NULL) + if (fwd->connect_host != NULL) { xfree(fwd->connect_host); - if (fwd->listen_host != NULL) + fwd->connect_host = NULL; + } + if (fwd->listen_host != NULL) { xfree(fwd->listen_host); + fwd->listen_host = NULL; + } return (0); }