*/
#include "includes.h"
-RCSID("$OpenBSD: readconf.c,v 1.100 2002/06/19 00:27:55 deraadt Exp $");
+RCSID("$OpenBSD: readconf.c,v 1.134 2004/07/11 17:48:47 deraadt Exp $");
#include "ssh.h"
#include "xmalloc.h"
Host fascist.blob.com
Port 23123
User tylonen
- RhostsAuthentication no
PasswordAuthentication no
Host puukko.hut.fi
Host *
ForwardAgent no
ForwardX11 no
- RhostsAuthentication yes
PasswordAuthentication yes
RSAAuthentication yes
RhostsRSAAuthentication yes
StrictHostKeyChecking yes
- KeepAlives no
+ TcpKeepAlive no
IdentityFile ~/.ssh/identity
Port 22
EscapeChar ~
typedef enum {
oBadOption,
- oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
+ oForwardAgent, oForwardX11, oForwardX11Trusted, oGatewayPorts,
oPasswordAuthentication, oRSAAuthentication,
oChallengeResponseAuthentication, oXAuthLocation,
-#if defined(KRB4) || defined(KRB5)
- oKerberosAuthentication,
-#endif
-#if defined(AFS) || defined(KRB5)
- oKerberosTgtPassing,
-#endif
-#ifdef AFS
- oAFSTokenPassing,
-#endif
oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
- oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts,
+ oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
oHostKeyAlgorithms, oBindAddress, oSmartcardDevice,
oClearAllForwardings, oNoHostAuthenticationForLocalhost,
- oDeprecated
+ oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
+ oAddressFamily, oGssAuthentication, oGssDelegateCreds,
+ oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
+ oSendEnv, oControlPath, oControlMaster,
+ oDeprecated, oUnsupported
} OpCodes;
/* Textual representations of the tokens. */
} keywords[] = {
{ "forwardagent", oForwardAgent },
{ "forwardx11", oForwardX11 },
+ { "forwardx11trusted", oForwardX11Trusted },
{ "xauthlocation", oXAuthLocation },
{ "gatewayports", oGatewayPorts },
{ "useprivilegedport", oUsePrivilegedPort },
- { "rhostsauthentication", oRhostsAuthentication },
+ { "rhostsauthentication", oDeprecated },
{ "passwordauthentication", oPasswordAuthentication },
{ "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
{ "kbdinteractivedevices", oKbdInteractiveDevices },
{ "challengeresponseauthentication", oChallengeResponseAuthentication },
{ "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
{ "tisauthentication", oChallengeResponseAuthentication }, /* alias */
-#if defined(KRB4) || defined(KRB5)
- { "kerberosauthentication", oKerberosAuthentication },
-#endif
-#if defined(AFS) || defined(KRB5)
- { "kerberostgtpassing", oKerberosTgtPassing },
-#endif
-#ifdef AFS
- { "afstokenpassing", oAFSTokenPassing },
+ { "kerberosauthentication", oUnsupported },
+ { "kerberostgtpassing", oUnsupported },
+ { "afstokenpassing", oUnsupported },
+#if defined(GSSAPI)
+ { "gssapiauthentication", oGssAuthentication },
+ { "gssapidelegatecredentials", oGssDelegateCreds },
+#else
+ { "gssapiauthentication", oUnsupported },
+ { "gssapidelegatecredentials", oUnsupported },
#endif
{ "fallbacktorsh", oDeprecated },
{ "usersh", oDeprecated },
{ "identityfile", oIdentityFile },
{ "identityfile2", oIdentityFile }, /* alias */
+ { "identitiesonly", oIdentitiesOnly },
{ "hostname", oHostName },
{ "hostkeyalias", oHostKeyAlias },
{ "proxycommand", oProxyCommand },
{ "stricthostkeychecking", oStrictHostKeyChecking },
{ "compression", oCompression },
{ "compressionlevel", oCompressionLevel },
- { "keepalive", oKeepAlives },
+ { "tcpkeepalive", oTCPKeepAlive },
+ { "keepalive", oTCPKeepAlive }, /* obsolete */
{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
{ "loglevel", oLogLevel },
{ "dynamicforward", oDynamicForward },
{ "preferredauthentications", oPreferredAuthentications },
{ "hostkeyalgorithms", oHostKeyAlgorithms },
{ "bindaddress", oBindAddress },
+#ifdef SMARTCARD
{ "smartcarddevice", oSmartcardDevice },
+#else
+ { "smartcarddevice", oUnsupported },
+#endif
{ "clearallforwardings", oClearAllForwardings },
+ { "enablesshkeysign", oEnableSSHKeysign },
+ { "verifyhostkeydns", oVerifyHostKeyDNS },
{ "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
+ { "rekeylimit", oRekeyLimit },
+ { "connecttimeout", oConnectTimeout },
+ { "addressfamily", oAddressFamily },
+ { "serveraliveinterval", oServerAliveInterval },
+ { "serveralivecountmax", oServerAliveCountMax },
+ { "sendenv", oSendEnv },
+ { "controlpath", oControlPath },
+ { "controlmaster", oControlMaster },
{ NULL, oBadOption }
};
* Processes a single option line as used in the configuration files. This
* only sets those values that have not already been set.
*/
+#define WHITESPACE " \t\r\n"
int
process_config_line(Options *options, const char *host,
char *line, const char *filename, int linenum,
int *activep)
{
- char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg;
+ char buf[256], *s, **charptr, *endofnumber, *keyword, *arg;
int opcode, *intptr, value;
+ size_t len;
u_short fwd_port, fwd_host_port;
char sfwd_host_port[6];
+ /* Strip trailing whitespace */
+ for(len = strlen(line) - 1; len > 0; len--) {
+ if (strchr(WHITESPACE, line[len]) == NULL)
+ break;
+ line[len] = '\0';
+ }
+
s = line;
/* Get the keyword. (Each line is supposed to begin with a keyword). */
keyword = strdelim(&s);
/* don't panic, but count bad options */
return -1;
/* NOTREACHED */
+ case oConnectTimeout:
+ intptr = &options->connection_timeout;
+parse_time:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%s line %d: missing time value.",
+ filename, linenum);
+ if ((value = convtime(arg)) == -1)
+ fatal("%s line %d: invalid time value.",
+ filename, linenum);
+ if (*intptr == -1)
+ *intptr = value;
+ break;
+
case oForwardAgent:
intptr = &options->forward_agent;
parse_flag:
intptr = &options->forward_x11;
goto parse_flag;
+ case oForwardX11Trusted:
+ intptr = &options->forward_x11_trusted;
+ goto parse_flag;
+
case oGatewayPorts:
intptr = &options->gateway_ports;
goto parse_flag;
intptr = &options->use_privileged_port;
goto parse_flag;
- case oRhostsAuthentication:
- intptr = &options->rhosts_authentication;
- goto parse_flag;
-
case oPasswordAuthentication:
intptr = &options->password_authentication;
goto parse_flag;
case oChallengeResponseAuthentication:
intptr = &options->challenge_response_authentication;
goto parse_flag;
-#if defined(KRB4) || defined(KRB5)
- case oKerberosAuthentication:
- intptr = &options->kerberos_authentication;
- goto parse_flag;
-#endif
-#if defined(AFS) || defined(KRB5)
- case oKerberosTgtPassing:
- intptr = &options->kerberos_tgt_passing;
+
+ case oGssAuthentication:
+ intptr = &options->gss_authentication;
goto parse_flag;
-#endif
-#ifdef AFS
- case oAFSTokenPassing:
- intptr = &options->afs_token_passing;
+
+ case oGssDelegateCreds:
+ intptr = &options->gss_deleg_creds;
goto parse_flag;
-#endif
+
case oBatchMode:
intptr = &options->batch_mode;
goto parse_flag;
intptr = &options->check_host_ip;
goto parse_flag;
+ case oVerifyHostKeyDNS:
+ intptr = &options->verify_host_key_dns;
+ goto parse_yesnoask;
+
case oStrictHostKeyChecking:
intptr = &options->strict_host_key_checking;
+parse_yesnoask:
arg = strdelim(&s);
if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing yes/no/ask argument.",
intptr = &options->compression;
goto parse_flag;
- case oKeepAlives:
- intptr = &options->keepalives;
+ case oTCPKeepAlive:
+ intptr = &options->tcp_keep_alive;
goto parse_flag;
case oNoHostAuthenticationForLocalhost:
intptr = &options->compression_level;
goto parse_int;
+ case oRekeyLimit:
+ intptr = &options->rekey_limit;
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (arg[0] < '0' || arg[0] > '9')
+ fatal("%.200s line %d: Bad number.", filename, linenum);
+ value = strtol(arg, &endofnumber, 10);
+ if (arg == endofnumber)
+ fatal("%.200s line %d: Bad number.", filename, linenum);
+ switch (toupper(*endofnumber)) {
+ case 'K':
+ value *= 1<<10;
+ break;
+ case 'M':
+ value *= 1<<20;
+ break;
+ case 'G':
+ value *= 1<<30;
+ break;
+ }
+ if (*activep && *intptr == -1)
+ *intptr = value;
+ break;
+
case oIdentityFile:
arg = strdelim(&s);
if (!arg || *arg == '\0')
goto parse_string;
case oProxyCommand:
+ if (s == NULL)
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
charptr = &options->proxy_command;
- string = xstrdup("");
- while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
- string = xrealloc(string, strlen(string) + strlen(arg) + 2);
- strcat(string, " ");
- strcat(string, arg);
- }
+ len = strspn(s, WHITESPACE "=");
if (*activep && *charptr == NULL)
- *charptr = string;
- else
- xfree(string);
+ *charptr = xstrdup(s + len);
return 0;
case oPort:
fatal("%.200s line %d: Badly formatted port number.",
filename, linenum);
if (*activep)
- add_local_forward(options, fwd_port, "socks4", 0);
+ add_local_forward(options, fwd_port, "socks", 0);
break;
case oClearAllForwardings:
*intptr = value;
break;
+ case oAddressFamily:
+ arg = strdelim(&s);
+ intptr = &options->address_family;
+ if (strcasecmp(arg, "inet") == 0)
+ value = AF_INET;
+ else if (strcasecmp(arg, "inet6") == 0)
+ value = AF_INET6;
+ else if (strcasecmp(arg, "any") == 0)
+ value = AF_UNSPEC;
+ else
+ fatal("Unsupported AddressFamily \"%s\"", arg);
+ if (*activep && *intptr == -1)
+ *intptr = value;
+ break;
+
+ case oEnableSSHKeysign:
+ intptr = &options->enable_ssh_keysign;
+ goto parse_flag;
+
+ case oIdentitiesOnly:
+ intptr = &options->identities_only;
+ goto parse_flag;
+
+ case oServerAliveInterval:
+ intptr = &options->server_alive_interval;
+ goto parse_time;
+
+ case oServerAliveCountMax:
+ intptr = &options->server_alive_count_max;
+ goto parse_int;
+
+ case oSendEnv:
+ while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
+ if (strchr(arg, '=') != NULL)
+ fatal("%s line %d: Invalid environment name.",
+ filename, linenum);
+ if (options->num_send_env >= MAX_SEND_ENV)
+ fatal("%s line %d: too many send env.",
+ filename, linenum);
+ options->send_env[options->num_send_env++] =
+ xstrdup(arg);
+ }
+ break;
+
+ case oControlPath:
+ charptr = &options->control_path;
+ goto parse_string;
+
+ case oControlMaster:
+ intptr = &options->control_master;
+ goto parse_yesnoask;
+
case oDeprecated:
debug("%s line %d: Deprecated option \"%s\"",
filename, linenum, keyword);
return 0;
+ case oUnsupported:
+ error("%s line %d: Unsupported option \"%s\"",
+ filename, linenum, keyword);
+ return 0;
+
default:
fatal("process_config_line: Unimplemented opcode %d", opcode);
}
*/
int
-read_config_file(const char *filename, const char *host, Options *options)
+read_config_file(const char *filename, const char *host, Options *options,
+ int checkperm)
{
FILE *f;
char line[1024];
int bad_options = 0;
/* Open the file. */
- f = fopen(filename, "r");
- if (!f)
+ if ((f = fopen(filename, "r")) == NULL)
return 0;
+ if (checkperm) {
+ struct stat sb;
+
+ if (fstat(fileno(f), &sb) == -1)
+ fatal("fstat %s: %s", filename, strerror(errno));
+ if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
+ (sb.st_mode & 022) != 0))
+ fatal("Bad owner or permissions on %s", filename);
+ }
+
debug("Reading configuration data %.200s", filename);
/*
memset(options, 'X', sizeof(*options));
options->forward_agent = -1;
options->forward_x11 = -1;
+ options->forward_x11_trusted = -1;
options->xauth_location = NULL;
options->gateway_ports = -1;
options->use_privileged_port = -1;
- options->rhosts_authentication = -1;
options->rsa_authentication = -1;
options->pubkey_authentication = -1;
options->challenge_response_authentication = -1;
-#if defined(KRB4) || defined(KRB5)
- options->kerberos_authentication = -1;
-#endif
-#if defined(AFS) || defined(KRB5)
- options->kerberos_tgt_passing = -1;
-#endif
-#ifdef AFS
- options->afs_token_passing = -1;
-#endif
+ options->gss_authentication = -1;
+ options->gss_deleg_creds = -1;
options->password_authentication = -1;
options->kbd_interactive_authentication = -1;
options->kbd_interactive_devices = NULL;
options->check_host_ip = -1;
options->strict_host_key_checking = -1;
options->compression = -1;
- options->keepalives = -1;
+ options->tcp_keep_alive = -1;
options->compression_level = -1;
options->port = -1;
+ options->address_family = -1;
options->connection_attempts = -1;
+ options->connection_timeout = -1;
options->number_of_password_prompts = -1;
options->cipher = -1;
options->ciphers = NULL;
options->preferred_authentications = NULL;
options->bind_address = NULL;
options->smartcard_device = NULL;
+ options->enable_ssh_keysign = - 1;
options->no_host_authentication_for_localhost = - 1;
+ options->identities_only = - 1;
+ options->rekey_limit = - 1;
+ options->verify_host_key_dns = -1;
+ options->server_alive_interval = -1;
+ options->server_alive_count_max = -1;
+ options->num_send_env = 0;
+ options->control_path = NULL;
+ options->control_master = -1;
}
/*
options->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->xauth_location == NULL)
options->xauth_location = _PATH_XAUTH;
if (options->gateway_ports == -1)
options->gateway_ports = 0;
if (options->use_privileged_port == -1)
options->use_privileged_port = 0;
- if (options->rhosts_authentication == -1)
- options->rhosts_authentication = 0;
if (options->rsa_authentication == -1)
options->rsa_authentication = 1;
if (options->pubkey_authentication == -1)
options->pubkey_authentication = 1;
if (options->challenge_response_authentication == -1)
options->challenge_response_authentication = 1;
-#if defined(KRB4) || defined(KRB5)
- if (options->kerberos_authentication == -1)
- options->kerberos_authentication = 1;
-#endif
-#if defined(AFS) || defined(KRB5)
- if (options->kerberos_tgt_passing == -1)
- options->kerberos_tgt_passing = 1;
-#endif
-#ifdef AFS
- if (options->afs_token_passing == -1)
- options->afs_token_passing = 1;
-#endif
+ 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->strict_host_key_checking = 2; /* 2 is default */
if (options->compression == -1)
options->compression = 0;
- if (options->keepalives == -1)
- options->keepalives = 1;
+ if (options->tcp_keep_alive == -1)
+ options->tcp_keep_alive = 1;
if (options->compression_level == -1)
options->compression_level = 6;
if (options->port == -1)
options->port = 0; /* Filled in ssh_connect. */
+ if (options->address_family == -1)
+ options->address_family = AF_UNSPEC;
if (options->connection_attempts == -1)
options->connection_attempts = 1;
if (options->number_of_password_prompts == -1)
clear_forwardings(options);
if (options->no_host_authentication_for_localhost == - 1)
options->no_host_authentication_for_localhost = 0;
+ if (options->identities_only == -1)
+ options->identities_only = 0;
+ if (options->enable_ssh_keysign == -1)
+ options->enable_ssh_keysign = 0;
+ if (options->rekey_limit == -1)
+ options->rekey_limit = 0;
+ if (options->verify_host_key_dns == -1)
+ options->verify_host_key_dns = 0;
+ if (options->server_alive_interval == -1)
+ options->server_alive_interval = 0;
+ if (options->server_alive_count_max == -1)
+ options->server_alive_count_max = 3;
+ if (options->control_master == -1)
+ options->control_master = 0;
/* options->proxy_command should not be set by default */
/* options->user will be set in the main program if appropriate */
/* options->hostname will be set in the main program if appropriate */
andersk / openssh.git / blobdiff